Home | Medical News | Medical Info. | Q & A | Contact Us | Contributions | About Us

 

MAY 2000 News

 

DON'T RACE TO INFERTILITY CLINIC


UPI - A Dutch fertility expert is trying to spread the word that couples wanting to conceive shouldn't seek help from drugs or procedures too quickly. Dr. Egbert te Velde, head of the Department of Reproductive Medicine at the Utrecht Medical Centre, says natural conception can easily occur outside the year of regular intercourse that many people have adopted as standard.
Combined with increasing numbers of competing clinics, says te Velde, many couples are simply pressing for assisted reproductive technology too soon. He advises, "Before considering treatment, couples should be counselled about their chances of conceiving spontaneously. ART is not without
complications and side effects," such as possible repercussions of ovarian hyperstimulation and risk of multiple births.


All rights reserved.

Back

 

 

BELIEFS ABOUT AGING CAN AFFECT HEART
 
UPI-Medical researchers can now show that how you feel about aging as you get older influences the health of your heart. In what they call "the first study of its kind," investigators led by epidemiologist Becca Levy of Yale School of Medicine found that exposing study participants to positive ideas about aging lowered their blood pressure readings during times of mild stress. Conversely, those exposed to negative ideas about aging subsequently registered higher values of systolic and diastolic blood pressure. Levy's team structured the 54-participant study to deliver subliminal messages via flashes of words across a computer screen. Positive words included "wisdom" and "creative," and negative words included "senile" and "dying." Levy says, "The study suggests that negative stereotypes of aging may contribute to health problems in the elderly without their awareness." She and her team publish the findings in the Journal of Gerontology.


All rights reserved.

Back

 

 

CHICKENPOX OR SHOT:
KIDS CHOOSE SHOT

UPI- A nationwide survey of children and their parents has found that most kids would choose enduring a shot to prevent chickenpox over acquiring immunity the old-fashioned way: enduring the itchy spots themselves. According to the survey, seven out of 10 children rated chickenpox as worse than having a cold, earache or other common ailments. Four out of 10 reported chickenpox made them "upset," often because they missed out on social activities or school in addition to feeling sick. The verdict of seven out of 10: they'd prefer taking the shot. The survey also indicated that many parents are not aware of the virus's potential complications, including pneumonia, bacterial infection and neurological problems. The varicella, or chickenpox, vaccine was approved by the U.S. Food and Drug Administration five years ago and is recommended by most medical organizations. The survey was conducted by Yankelovich Partners, Inc. for the National Association of Pediatric Nurse Associates and Practitioners.


All rights reserved.

 Back

 

 

PRESCRIPTION COSTS RISING MOST FOR SENIORS

UPI- A report examining prescription drug costs last year finds the average cost of a prescription rose 9.6 percent. Older patients are being hit even harder, however-their costs rose a record 17.4 percent. The 1999 Drug Trend Report, presented by pharmacy benefit manager Express Scripts Inc, points to a number of reasons for the jumps. In addition to higher prices, patients are also receiving more pills per prescription than previously. Changes in chemical composition, including strength and dosage forms, are partially responsible for the price hike as well. Barrett Toan, Express Scripts chief executive offier, says the St. Louis-based company predicts prescription drug costs will nearly double over the next five years. Toan champions a responsibly run program for prescription drug coverage among seniors.

All rights reserved.

Back

 

Painless Heart Attacks More Common
More Deadly

By MIKE SANTANGELO, CHICAGO, June 27 (UPI)

Painless heart attacks may be more deadly and more common than you think, researchers say.
A third of all patients who show up at hospitals with heart attacks have no chest pains and that lack of pain apparently is deceptively fatal, doctors are reporting in Wednesday's issue of the Journal of the American Medical Association. They tend to delay by about 2 1/2 hours their trip to the hospital, and once in the emergency room, doctors tend to miss the diagnosis, identifying heart attacks in just 22 percent of cases.
The result is that no pain may more than double a heart patient's chance of dying, according to the JAMA study of 400,000 heart attack victims.
The stealth heart attack patients were prescribed lifesaving clot-buster drugs in 28 percent of cases while 48 percent of patients with chest pains received the drugs. Only 25 percent with no pain were given angioplasty, against 74 percent of the chest pain group.
The delay in diagnosis was found to slow down treatment for more than two hours, leaving the patient dead or with permanent heart damage. The surprising results come from a study of the records of more than 434,877 people who had attacks between June 1994 and March 1998.
Leader of the study, Dr. John Canto, director of the University of Alabama at BIrmingham's Chest Pain Center, told UPI, "Chest pain is an important symptom, but not the only one."
Canto says absence of chest pain will increase a person's chance of dying by more than 200 percent.
The heart specialist says indigestion, a cold sweat, shortness of breath, even a pain in the foot or low blood pressure can be an indication of an attack.
The doctor says women are especially at risk for the stealth coronaries with 49 percent of the victims being female. Another high-risk group are minorities (blacks, Hispanics, Asians), a third of those in the study fell into that group. The doctor says the reason for the extra risk is not known.
Canto says, "We need to educate both the public and medical providers on the other symptoms of heart attacks." The Birmingham study found six factors that appear to be associated with the absence of chest pains. The most important factor is a prior episode of heart failure, next comes stroke, old age, diabetes, being female or belonging to a minority group.
A person with two or more of the risk factors is 50 percent more likely to die as a result of a heart attack. Canto says that anyone with more than one of the risk factors should "go and have a talk with their doctor," so the physician will be alerted to look for other symptoms that could indicate a heart blockage.
The large number of stealth heart attacks found by the study was "a surprise," said Dr. Joshua Kerstein, assistant director of cardiology at Maimonides Medical Center, in Brooklyn, New York. Kerstein told UPI that cardiologists have been aware of no-chest pain heart attacks for a long time, "But one-third is a very significant number, I didn't know it was in such numbers."
Kerstein said the greatest danger for the patient was that the delay in getting to a hospital for treatment. He says, "Treatment is needed within six hours" to prevent permanent damage.
Kerstein, who teaches at Maimonides says he constantly tells young doctors to look for the other symptoms that go along with a heart attack. He says the most serious is a cold sweat. "If you have nausea, and are sweating, come into the hospital, don't blame it all on the stomach, even if you just ate chili."

All rights reserved.

Back

 

 

Expectant dads: Pass the pickles, please
 TORONTO,UPI June 22 (UPI)

Fatherhood may in fact come naturally. Just as women's hormone levels change as they are about to become mothers, male hormone levels shift significantly throughout the course of their wives' pregnancy, researchers are reporting.
"This validates the experience of men becoming fathers," said lead researcher Katherine E. Wynne-Edwards of Queen's University in Kingston, Ontario. "Things are changing on a biologic level." While Wynne-Edwards didn't link changing hormones to parenting behaviors, animal studies indicate that hormones affect the male's willingness to take care of his offspring. Animal studies have linked nurturing with lower testosterone levels, for example. Sure enough, Wynne-Edwards found that average testosterone levels were significantly lower in 13 expectant fathers compared to 14 guys who had no children. Testosterone levels began to rise in the new dads soon after their wives gave birth, she said, but remained lower than in guys who did not have children.
More soon-to-be dads had detectable amounts of estrogen, the female sex hormone, in their saliva than did men whose partners were not expecting, she reported in Toronto at the annual meeting of The Endocrine Society. Estrogen levels rose after the birth of their child, Wynne-Edwards said.
Each of the 17 men in the study -- and their partners -- spit into test tubes at the same time every day. The researchers collected the vials and analyzed the contents for levels of testosterone, estrogen, and cortisol, a stress hormone. Cortisol levels were lower in expectant dads and did not change after the baby was born.
"This is very exciting data," said Lorraine A. Fitzpatrick of the Mayo Clinic in Rochester, Minn. "With mothers we talk about nesting and bonding but there's been nothing to date on what happens with fathers." Behaviors and hormones are pretty tightly linked, she said, so it's hard to tell from this study which comes first. There's probably a feedback loop so that hormones and behavioral changes "are working hand in hand" to promote nurturing behaviors, she said. The men in the study were all first time fathers or had no children. They were in their early 20s to early 30s, and their wives were slightly younger. All of the men in this study were taking prenatal classes with their wives. Men who are less involved in parenting may have different hormonal responses. But men who are less motivated about becoming a parent are probably going to be less motivated to participate in scientific studies, Wynne-Edwards said. So she hopes to look at hormone levels in men from different cultures who may have different expectations about the degree of involvement being a committed dad means.
She also plans to try manipulating hormone levels in hamsters to identify behaviors that in and of themselves influence hormone levels. Ultimately, such research might lead to ideas for how to help moms who have difficulty bonding with their newborn, she said.

All rights reserved.

Back

 

 

Genes may play a role in diabetic kidney disease
 TORONTO, UPI,June 22 (UPI)

Three newly discovered genes may play a role in protecting the kidneys of people with diabetes from damage, researchers reported at a major endocrinology meeting. The findings may be the first step in developing therapies to hold kidney failure at bay in people with diabetes, they said.
Kidney damage is a common complication of diabetes, occurring in up to three million people with diabetes. Diabetes, characterized by high blood sugar that results from the body's inability to produce insulin or use it effectively, affects about 16 million Americans.
Understanding how these genes work in the kidney could open up new paths to treat diabetic patients already suffering from kidney disease, said Karen Coschigano of the Edison Biotechnology Institute at the University of Ohio in Athens. Potentially, she said in Toronto at the annual meeting of The Endocrine Society, kidney disease that is caught early might be reversed with such treatment.
Almost all patients with kidney failure have diabetes, said Daniel Drucker, an endocrinologist at Toronto General Hospital in Toronto. "This is a huge, huge problem...if we could figure out why diabetics get kidney disease it would have a significant public health impact," he said.
Coschigano and her colleagues first found that mice genetically engineered to produce bovine growth hormone develop kidney problems similar to those found in diabetic mice. In contrast, mice engineered to lack genes for the growth hormone receptor -- the protein on the surface of cells that recognizes growth hormone -- do not develop kidney damage, even if the researchers induce diabetes.
But growth hormone plays an important role in metabolism and regulation of muscle mass, and disrupting its function would probably cause many side effects, Coschigano said. So she and her colleagues then looked at the expression of genes in the damaged kidneys of diabetic mice, the healthy kidneys of normal mice, and the healthy kidneys of diabetic mice missing growth hormone receptors. They found two genes that were active in mice that didn't develop kidney disease but were not active in mice that did. They also found a gene that is active in mice that develop kidney damage but inactive in mice that do not.
It isn't clear yet what those genes do, Coschigano said, but there's good reason to suspect similar genes may be active in protecting people from diabetes-related kidney damage. Some people produce too much growth hormone in adulthood, perhaps because of pituitary tumors, Coschigano said. People with this condition, called acromegaly, suffer from overgrowth of bones including the jaw and the brow, and are also likely to develop heart disease, she said. As treatments get better and these patients live longer, she said, "there's increasing evidence that they are also prone to kidney damage." Many other researchers are looking at genes -- in mice and humans -- that predispose people with diabetes to develop kidney disease, Drucker said.
However, Coschigano points out that she and her colleagues are the only group actively looking for genes that may protect against the disease.

All rights reserved.

 Back

 

 

Neurologist ranks top 10 migraine web sites
 B MONTREAL,UPI, June 23 (UPI)

Finding reliable information on migraine from Internet sources can be, well, a headache.
"If you write in 'migraine' in any common search engine you can get to choose from around 30,000 web pages," said Dr. Stephen J. Peroutka, a clinical migraine researcher, from Burlingame, Calif. "There is a massive amount of good information out there, but for the consumer, it's like looking at cable TV with 100 stations but with no TV Guide." Peroutka decided to rate the most promising sites. He took the top 10 sites from 10 popular search engines -- including Yahoo!, America Online (AOL), Web Crawler and others, and scrutinized the list. "There was some duplications and some of the sites were no longer functioning, so I was left with 63 active sites." He evaluated the sites using a system of 100 possible points, assigning 0 to 20 points each for content, accuracy, references and design, and 0 to 5 points each for author, sponsor, date of last update and medical disclaimer.
"A lot of the commercial sites and pharmaceutical sites won't link to other information sites," Peroutka said. "The drug sites don't seem to want you to know that there might be another migraine medicine out there.
Obviously, it had to be somewhat subjective, but I approached it from the physician and consumer perspective, looking for what I would want my patients to see," said Peroutka.
He noted that "when you type 'migraine' into a typical search engine, what comes up first is not ranked by quality of the site, but how much traffic the site gets, how often it refers to other web sites and other factors. Of the 10 sites that most often popped up first, there were only two or three sites I thought were good." Peroutka described his Top 10 migraine sites at the annual scientific meeting of the American Headache Society in Montreal.
The sites are:

  1. "JAMA Migraine Information Center" (85 points): <http://www.ama-assn.org/special/migraine/migraine.htm>
     He said that the site is compiled by the Journal of the American Medical Association, this excellent overview of migraine combines news updates, general information and links to other relevant sites.
  2. "Migraine Diagnosis" (85 points):
    <http://www.upstate.edu/haasd/hpmidx.htm>
    Perourtka said the site was created by Dr. David C. Haas, professor of neurology and a headache specialist at SUNY Upstate Medical University in Syracuse, New York. "This is a good site for knowledgeable patients and provides outstanding visual effects of aura," Peroutka said.
  3. "AMA Health Insight: Migraine" (80 points): <http://www.ama-assn.org/insight/spec_con/migraine/migraine.htm>
  4. "Ronda's Migraine Page" (80 points):
    <http://www.migrainepage.com>
    "Compiled by Ronda Solberg, a woman who has had migraine headaches her entire life, this is an interesting and successful mix of information from a patient's perspective," Peroutka said.
  5. "Women's Health Interactive: Headache Center/Migraine Headache" (80 points) <http://www.womens-health.com/health_center/headache/migraine.html>
  6. "Migraine Awareness Group: A National Understanding for Migraineurs (M.A.G.N.U.M.)" (65 points): <http://www.migraines.org/>
  7. "Your Migraines. American Council for Headache Education (ACHE)" (60 points)The site is organized by the American Headache Society.:
    <http://www.achenet.org/your/
  8. "Migraines: You are Not Alone" (60 points): <http://www.geocities.com/HotSprings/Spa/7379/migraine.html>
    Peroutka said this patient web site, compiled by Karen Cohen, a longtime sufferer of migraine headaches, "could be better organized, but offers an excellent, wide assortment of information and links for migraine patients."
  9. "Discovery Health: Headaches" (55 points): <http://www.discoveryhealth.com/DH/ihtIH/WSDSC000/20707/9347/210168.html?d=d >
  10. "Migraine Action Association" (55 points):
    <http://www.migraine.org.uk>
    He said this site, organized by a British nonprofit association for migraine sufferers, "is an excellent resource for people with migraine."

All rights reserved.

Back

 

Cholesterol lowering drugs may build strong bones

 WASHINGTON, UPI, June 23, 2000

Two new studies suggest that a single medication may protect against heart attack at the same time that it can reduce by half the risk of fractures associated with osteoporosis, a finding that has taken osteoporosis experts by surprise.
The two new studies -- both case-controlled observational studies -- are published in the June 24 issue of The Lancet.
Dr. Gregory Mundy, the scientist whose work with tissue cultures and rats turned other researchers onto the possibility that drugs called statins may actually increase bone density, says he was taken by surprise by the Lancet studies.
Mundy published a study in Science last December that reported statins could stimulate bone growth in rats and in tissue culture. Since then he has been working on developing a skin patch containing hydrooxymethylglutaryl-coenzyme A reductase, the chemical name for the drugs, so that more of the drug gets to the bone.
"Oral statins are really very poorly distributed to the bone because they are designed to target the liver," Mundy said in a telephone interview. He said he thought that a "bone" statin would be needed to see a real effect in humans." But with these new studies showing a 50% reduction in fracture risk maybe we don't need that," he said.
In one of the two Lancet studies Dr. K. Arnold Chan, assistant professor of medicine, Channing Laboratory, Brigham and Women's Hospital and Harvard Medical School, and his co-authors studied medical records from 928 women with osteoporosis-associated fractures and compared them to records of 2,747 healthy women of the same age.Chan says, "we found that using statins for at least 2 years reduced fracture risk by 50 percent." In the second Lancet paper, Dr. Chris Edwards of St. Thomas' Hospital, London reports that 41 women who are taking statins had bone mineral density that was an average of 8 percent higher than 100 women who don't take statins.
Edwards said, "There is really nothing out there that you can take on a regular basis to increase BMD. This is really something new and it needs to be confirmed in prospective studies." He said he is interested in using statins to stimulate bone growth for healing of joints in patients with osteoarthritis.
Mundy, a professor of medicine at the University of Texas Health Sciences Center San Antonio, says that it is very likely that statins could play a role in "all types of situations where new bone is needed: fractures, fixation of prostheses, spinal injury and so on." But Mundy says the biggest role may be for the treatment and prevention of osteoporosis, which currently affects more than 10 million Americans, most of the elderly women. Mundy is on the scientific advisory board of the National Osteoporosis Foundation (NOF) and he says that one real benefit of statins is their tolerability.
Fosamax, the bisphonsponate currently approved for osteoporosis, can cause gastrointestinal problems making it difficult to take. Evista, chemical name raloxifene, a new drug from a class called selective estrogen receptor modulators or SERMs, is better tolerated but not as good at preventing fracture, he says.
That leaves calcium and vitamin D, both considered less than optimum, and estrogen, the hormone that was long held to be the best way to protect against osteoporosis and heart disease in post-menopausal women. New clinical studies have questioned the value of estrogen and many women are fearful of taking it because of a possible link to increased risk of breast cancer.
Those considerations combine to make statins very attractive, says Dr.
Felicia Cosman, clinical director of NOF. She says a drug that could deliver a one-two punch, knocking out both heart disease and osteoporosis would be "major. It's a very exciting prospect." Statins are now used to lower LDL, the so-called bad cholesterol, and some of them also increase HDL, the good cholesterol. It is widely believed - based on clinical trials - that statins can reduce the risk of heart attack and stroke. Cosman cautions, however, that the findings need to be confirmed by prospective studies. She says that too often findings from observational studies are disproved when held up to the more rigorous standards of a prospective, placebo-controlled trial.

All rights reserved.

Back

 

 

 

AMA seek curbs on non-doctor testing

CHICAGO, June 14 (UPI)

After contentious debate that spilled over two days, doctors at the American Medical Association annual meeting voted Wednesday to have the AMA seek legislation to restrict pharmacists and other non-physicians from performing and/or interpreting medical tests.
Much of the debate over a perceived increase in expansion of the ability of non-physicians to perform such tests as cholesterol and diabetes screening centered on who could prescribe medications, tests and other procedures.
"The idea is to keep pharmacists from performing cholesterol tests and then advising patients whether to change their medication up or down," said Dr. Sandra Olson, a Chicago neurologist.
The resolution decried legislative expansion of the scope of practice of non-physicians and specifically cited pharmacists as lacking "the clinical education and training to assess appropriately the accuracy, reliability or appropriateness of laboratory tests."
Speakers noted that in certain situations dentists, midwives, podiatrists and other medical professionals might be able to prescribe such tests. The debate included numerous time-consuming amendments and attempts to refer the matter to a committee for further study. The debate took up so much time on Tuesday that leaders agreed to table the issue until Wednesday to allow rewriting the resolution, agreeing with internist Dr. Melvyn Sterling of Orange, Calif., that "if we don't take the time and end up doing the wrong thing we will regret it."
The physicians regrouped on Wednesday and finally agreed that the AMA "through appropriate legislative and regulatory efforts, seek to ensure that diagnostic laboratory testing should only be performed by those individuals who possess appropriate clinical education and training, under the
supervision of licensed physicians and licensed dentists."
In other matter at the AMA annual meeting delegates Wednesday:
--Requested that the Consumer Products Safety Board issue warning labels over the potential eye damage that can occur with the use of "bungee cords" used to secure loads.
It might sound like a trivial problem, but Dr. Bruce Scott, a member of the AMA Board of Trustees and an otolarnygologist from Louisville, Ky., said "when people are being blinded by these objects there is a need to inform and warn the public about their use." He said the cords are used in numerous products, including in children's toys.
--Supported increased efforts to reduce use of products containing mercury in order to lower risks of environmental and health contamination. The delegates rejected an outright ban on mercury in light of testimony that mercury-free instruments for calibrating some conditions -- especially high blood pressure -- might still require further technological advances. "The delegates urged the development of suitable alternatives for mercury and its suitable disposal," noted Dr. Myron Genel, professor of pediatrics at Yale University School of Medicine and chairman of the AMA's Council on scientific Affairs.
--Rejected a proposal that would have urged regulators to demand padding on dishwasher doors to prevent leg injuries. Dr. Diana Dell of Toronto, a psychiatrist and chairman of the public health committee that heard testimony on the issue, said there was no data presented to indicate how often serious injuries due to walking or running into open doors occurs.
--Elected Dr. Nancy Nielsen, an infectious disease specialist from Buffalo, N.Y., as vice speaker. Nielsen is the first women in the 153-year history of the AMA to hold that position. The speaker is the leading officer of the House of Delegates, the AMA's policy-making body.
--Asked its Council on Scientific Affairs to monitor the use of anti-microbials in consumer products, specifically scrutinizing if those products are adversely affecting resistant to antibacterial and antifungal
medications.

All rights reserved.

Back

 

 

Caution urged for enzyme use
SAN FRANCISCO, June 14 (UPI)

The much publicized telomerase enzyme, shown to extend cells' lifespan, may have a link to cancer, researchers report.
Use of telomerase-based techniques for therapeutic purposes should be approached with caution, they said in an article to be published in the British journal Nature on Thursday.
Other scientists said the study was small, did not show any direct connection to tumors and should have no significant impact on current research in the field.
Biotechnology firms such as Geron Corp. in Menlo Park, Calif., which specializes in aging research, have been conducting a variety of laboratory experiments that take advantage of the special properties of the enzyme, discovered a decade ago in a single-celled protozoan, first connected to aging in 1986 and since then shown to repair key DNA strands at the ends of chromosomes -- called telomeres -- in immortal cancer cells, sperm and ovum and to significantly prolong life in other cells.
Telomerase has captured wide scientific attention because the ability to prolong the life of human cells holds promise in a wide array of biopharmaceutical research, including drug development, screening and
toxicology testing, investigators said.
"The development of better cellular models of human disease and production of human products are among the immediate applications of this new advance," Jerry Shay, professor of cell biology at the University of Texas Southwestern Medical Center in Dallas, told United Press International.
"For example, in the past scientists have used primary cultures derived from patients with chromosomal instability syndromes. Since many of these cell types do not grow well, it has been difficult to compare results between laboratories.... With the ability to...essentially immortalize human cells, there is clear utility in developing better cell culture models of human chromosomal disorders."
In addition, the technology to introduce telomerase into cells has the potential to produce unlimited quantities of normal human cells of virtually any tissue type and may have most immediate practical biomedical applications in transplantation medicine, scientists told UPI.
"In the future, it may be possible to take a person's own cells, manipulate and rejuvenate them without using up their lifespan and then give them back to the patient," Shay said. "In addition, genetic engineering of telomerase-immortalized cells could lead to the development of cell-based therapies for certain genetic disorders."
The idea is to use the enzyme's special features to induce normal human cells to proliferate for therapeutic purposes. The new study, conducted on human breast epithelial cells, indicates the process might present some level of cancer risk if the cells were put to clinical use, the authors
said.
The team found an unexpected side effect of treating cells with TERT, a component of telomerase, which keeps aging at bay by keeping chromosome ends in good shape. In the absence of telomerase, telomeres shrink with each cell division until they become so short, cells stop dividing.
Experiments in other laboratories had indicated producing telomerase to extend the lifespan of cultured cells did not appear to transform the cells into a cancerous state, but the new study pointed to at least one hallmark of cancer cells -- activation of the cancer-causing c-myc gene.
When TERT was used to prolong cell lifespan, the oncogene was activated, stimulating cells to produce two to three times the normal amount of the c-Myc protein, said lead study author David Beach of the Wolfson Institute for Biomedical Research at University College London.
While the immortalized cells were not fully transformed into a cancerous state, elevated c-myc production is a major step in the multi-phase process leading to malignancy, the scientists said.
Since the activation of the c-myc oncogene occurs in breast and other tumors and is observed in some 70,000 fatal cancers each year in the United States alone, "these findings indicate that the use of TERT for the expansion of normal human cells for therapeutic purposes must be approached with caution," Beach and his colleagues concluded.
"I would characterize our findings as a cautionary warning telling us we have to be careful," study co-author Gregory Hannon, associate professor in the Watson School of Biological Sciences at Cold Spring Harbor Laboratory in New York, said in an interview. "Cells that are produced in this way need to
be characterized in a very thorough manner before being used for therapeutic purposes."
The scientists were quite surprised at the outcome, expecting the opposite result, based on data from previous studies, Hannon said. "This paper is meant to raise concern and no more," he told UPI. "The idea that this is a neutral event has to be approached with caution."It was a small study related to one set of human mammary epithelial cells without biological data," Calvin Harley, chief scientific officer for Geron, said in an interview, adding that there was no evidence the increase observed in the production of the myc oncogene had any consequence or that it was the cell immortalization that caused the activation.
"The implications for our work are really zero," he said. "We're looking at regulated expression of telomerase in terms of in-vivo therapy. We're not proposing permanently immortalized cells in humans."
"I believe the observations reported are accurate, but this is a very brief report with many unanswered questions," Shay said.
"Many cells express both myc and TERT and are not tumor cells. Human reproductive cells have high levels of telomerase, and there is not an increased incidence of cancer in reproductive cells over other tissue types.
Telomerase by itself is not going to cause cancer, only provide the cells with unlimited divisions. The cells would have to accumulate many additional alterations to become a cancer cell. Thus, while it is appropriate to be cautious, I believe that putting TERT into cells that can be well characterized would not increase the risk of cancer very much and may be worth the risk in certain cases."
TERT has been confined mostly to basic laboratory research but is steadily encroaching into animal studies, researchers said.
In one recent investigation, a team led by Peter Hornsby of Baylor College of Medicine in Houston used TERT to prolong the lifespan of bovine adrenal cells, which were then placed in the kidney of a mouse with a suppressed immune system and with a missing adrenal gland. Such mice normally die within 25 days since they are unable to produce life-sustaining steroids called glucocorticoids. The treated mice produced the steroid and survived, said Hornsby, author of the study published in the journal Nature
Biotechnology.
Similarly, delivering the telomerase gene into mice with failing livers spared their lives in a study at the Dana-Farber Cancer Institute in Boston, reported in the journal Science.
In terms of human patients, researchers foresee initial therapy consisting of the removal of a few cells by fine needle or surgical biopsy and the resetting of the telomere clock in the laboratory, thus providing the cells with unlimited divisions. The cells could then be reintroduced into the patient, sparing him the possibility of immune rejection since they are his own, researchers said.
"In the case of a genetic disorder, the telomere clock could be reset, then the corrected gene inserted, and finally the cells reintroduced into the patient," Shay said. "In the future we may not need to permanently introduce the telomerase gene; hTERT (the gene) could be introduced to grow the telomeres and then be removed, or perhaps a small molecule will be discovered that can reset the telomere clock. This would avoid potential problems with having too much growth potential, and thus increased risk for cancer."
Genetic engineering of telomerase-immortalized human cells could lead to the development of cell-based therapies for certain genetic disorders, such as muscular dystrophy. Other areas of cell engineering within the realm of possibility include having an unlimited supply of skin cells for grafts for burn patients, for treating chronic (pressure or diabetic) ulcers or for generating cosmetic products for aging skin, scientists said.
Other potential future applications include treatments for patients with age-related conditions, blood diseases, AIDS or bone-marrow disorders.
"Producing an unlimited supply of pancreatic islet cells that are glucose responsive for the treatment of diabetes, telomere modifications of the endothelial lining of blood vessels to prevent arteriosclerosis, bone marrow stem cells for blood transplants, osteoprogenitor cells for rebuilding bone, hepatocytes to alleviate cirrhotic pathology (due to viral hepatitis) and in retinal cells for the treatment of macular degeneration (a leading cause of age-related blindness) are other areas being considered," Shay said.
"The results so far are important as they document that the introduction or activation of telomerase in normal cells is likely to have many applications and a major impact for the future of medicine."

All rights reserved.

Back

 

 

Lifespan lengthening more than expected
SAN FRANCISCO, June 16 (UPI)

Residents of key industrial nations are expected to live longer than anticipated by their governments whose, underestimates of longevity may have social and economic repercussions, researchers report. The overly conservative official mortality forecasts may carry implications of overextensions in health services and shortfalls in pension provisions, said the scientists from Mountain View Research in Los Altos, Calif., who analyzed 50 years of data on death rate decline in the so-called Group of 7 nations. 
The team of Shripad Tuljapurkar, Nan Li and Carl Boe found a persistent decline in mortality during the period 1950 to 1994 in Canada, France, Germany, Italy, Japan, the United Kingdom and the United States. Based on their study, the researchers came up with a new death rate forecast that suggests by the year 2050, populations in those countries may be living from 1.3 years -- in the UK -- to eight years -- in Japan -- longer than officials are projecting. The average lifespan has jumped from about 20 years for early humans to 80 or so for inhabitants of modern-day industrialized countries, with most of the increase occurring in the past 150 years, said Shiro Horiuchi of the Laboratory of Populations at Rockefeller University in New York, who wrote an accompanying News and Views article to the study published in the British journal Nature. 
"These days, the existence of a biological limit to human longevity is considered questionable," he said. "Overall, the evidence supports the expectation that scientific, technological and economic developments will lead to more effective control of degenerative diseases and aging processes, making it possible to sustain the rapid pace of mortality decline." Noting the remarkably regular pattern, the authors of the study funded by the National Institute on Aging (NIA) predicted that the 2050 dependency ratio -- those over 65 years of age to those 20 to 64 years of age who are in the workforce -- will exceed official forecasts by anywhere from 6 percent in the United Kingdom to 40 percent in Japan.
The study authors expect this rate to double in the United States in the next 50 years, from .22 to .40 residents over 65 for every working man and woman between 20 and 64. "Studies such as these are important in helping to forecast demographic shifts," said Richard Suzman, NIA associate director for Behavioral and Social Research. "Being able to predict how these populations will age has enormous implications for the planning and provision of services and support. Small increases in life expectancy translate into large increases in the population.
" The aging population is no news to demographers, and the coming of age of the U.S. "baby boomers" has been officially anticipated for some time, with the first boomer to turn 65 in 2011. But the new report talks of lower death rates over longer periods. The mortality data for the seven countries show a significant, steadfast death rate decline at all ages in every nation for the past half century -- a surprising pattern that is expected to continue alongside growing efforts to improve public health, scientists said. The current government estimates of life expectancy in 2050 and new median forecasts reported in the study are: Canada: 81.67 and 85.26, respectively France: 83.50 and 87.81 Germany: 81.50 and 83.12 Japan: 82.95 and 90.91 United Kingdom: 82.50 and 83.79 United States: 80.45 and 82.91. 
"The dependency ratio is often examined by demographers and planners because it is viewed as an important concept for planning retirement systems and health care programs," Tuljapurkar and team noted. If their models are correct, "in 2050, these ratios would be higher by between 6 percent (UK) and 40 percent (Japan), suggesting that programs for old-age support, which may be based on official life expectancy estimates, may need to be re-examined.
" Census Bureau officials said some of the U.S. government projections used in the study have since been updated and that other governments are also realizing the need to take a second look at their forecasts. "It is not surprising that government forecasts of life expectancy and the size of the elderly population in G7 countries are much more conservative than those of Tuljapurkar et al," said Horiuchi. "In the past, national governments, as well as international organizations and academic researchers, have almost invariably underpredicted life expectancy in industrialized market-economy countries." For example, in 1984 the United Nations prepared international population projections based on a human life expectancy of 75 years for males and 82.5 years for females, yet in 1998, the projected lifespans for men and women in Japan were 77.2 years and 82.5 years, respectively.
 "The reason for the underestimates is partly because forecasters regard conservative prospects as less controversial and so 'safe,'" Horiuchi concluded. "It looks as if the same error is still being made."

All rights reserved.

 Back

 

 

Pesticide spraying may begin Monday in NYC
NEW YORK, June 16 (UPI)

The encephalitis virus was detected in New York City in a June 8 blood test and if a second test proves positive over the weekend, pesticide spraying to kill mosquitoes may begin Monday night. "We are waiting for confirmation on the blood test from the Centers for Disease Control (in Atlanta)," said Dr. Neil Cohen, the New York City's health commissioner. 
"A blood sample has also been sent to National Veterinary Lab in Ames, Iowa." The West Nile encephalitis virus had been found in two dead crow in Rockland County last week, but this may be the first sign that the live virus wintered over in the New York City area. The virus was detected in the blood of one "sentinel" chicken located near Flushing Meadow Park in Queens. The sentinel chickens have been posted in 60 coops around the city as an early warning system to detect the virus. The virus is harbored in birds and is spread to birds and mammals by mosquitoes. Infected birds cannot spread the virus to humans. 
Additional sentinel chickens have been also posted at the Canadian/U.S. border to detect the spread of the virus. If the blood test is found positive, spraying by trucks may begin as early as Monday in the Corona area of Queens. The pesticide Scourge, a pyrethroid-based substance that uses the active ingredient Resmethrin, is described as "relatively nontoxic to humans, dogs, cats and other mammals." It's considered less toxic than the pesticide Malathion used last year. 
After people became ill with the virus in 1999 every part of the city was sprayed with Malathion several times by air and by truck. The widespread spraying of Malathion came under fire and spraying this year is only to be done by truck and at night. However, the city health department commissioner urged people in the Queens section of Corona with asthma or respiratory conditions to stay indoors during the spraying and to keep their doors closed and air-conditioners turned off. The West Nile strain was detected for the first time in the Western Hemisphere last fall when 62 people were confirmed with the encephalitis virus in New York City. Seven more died from the disease that produces flu-like symptoms that at its worst causes inflammation of the brain. 
But most people infected with the virus do not demonstrate any symptoms but those with compromised immune systems such as the elderly or those with terminal diseases are considered most at risk. The city and the state are trying to pinpoint the possible spread of the virus using the live sentinel chickens and testing dead birds. "So far, the virus in dead birds has not been detected north of Rockland County," said state Department of Conservation wildlife specialist Ward Stone. 
"But we will continue to test birds and we want the public to report any dead birds found." New York City has been implementing an extensive campaign to kill mosquito larva and reduce mosquito breeding sites by using larvicide in its storm and sewer lines. The city is also using millions of tiny fish to eat the mosquito larvae in the city's waste treatment plants. Widespread pesticide spraying had been considered a "last resort" by the city under it "worse-case scenario." The state is urging areas as far north as the capital district, 150 miles north of New York City, to eliminate any standing pool of water that can serve as a breeding ground for mosquitoes. 
The state wants residents and landlords to unclog roof gutters, drain standing water and rain barrels, chlorinate pools, dispose of tires and change bird bath water every week. The state Department of Health has developed strategies to promote public cooperation in reducing man-made collections of polluted water in which "Culex" mosquitoes breed; help individuals reduce their risk of being bitten by mosquitoes; and educate health care providers about the virus and its prevention, and the diagnosis and treatment of human encephalitis.

All rights reserved.

 

Back

 

Catholic hospital policies debated by AMA

CHICAGO, June 12 (UPI)


Doctors from the around the country meeting in Chicago Monday debated whether they should back a proposal to force Catholic hospitals to provide reproductive services such as sterilization and contraception.
The delegates to an American Medical Association conference considered a resolution, submitted by delegates from California, that asked the AMA to support legislation that would require all hospitals accepting federal Medicare or Medicaid funds to offer a full range of reproductive services.
Proponents of the resolution, which pitted cries of religious freedom against claims of monopolistic policies, charge women were denied those services in some small communities where the only hospitals were run by a Catholic hospital.
The debate was joined by an invited appearance by Cardinal Francis George, archbishop of Chicago. "Clearly this includes requirements for contraception, sterilization and abortion with which Catholic hospitals simply cannot reply," the archbishop said. "Effectively, the AMA is being asked to help abolish Catholic health care in this country. I urge the AMA not to join this campaign against religious freedom."
Dr. Michael Cohen of Walnut Creek, Calif., said his state delegation brought the attention to the AMA following a scenario in Gilroy, Calif., in which a Catholic hospital group purchased the only other hospital in the 40,000-population community and began denying services such as tubal ligation following birth of a child.
Dr. David Priver of San Diego said that in denying such services at the time of delivery -- the optimum time for the sterilization procedure -- the patient was forced to seek another hospital, often considerable distance from home, under go another procedure and another round of anesthesia.
"That's lousy medical care, and the AMA should not side itself with lousy medical care," he said. Dr. Joseph English of New York said the issues was divisive to the AMA and probably impractical to achieve through federal legislation. He noted the difficulty in achieving passage of a Patients Bill of Rights in Congress when it was overwhelmingly favored by the American public, and doubted that the California proposal would achieve that kind of support. "We should not do anything that further separates us," he said.
In a statement submitted to the AMA committee on legislation that heard testimony on the matter, the Catholic Health Association of the United States said: "The resolution is a direct and blatant affront to religious freedom. In fact, it is a thinly veiled attack on the right of Catholic healthcare organizations to provide healthcare services in a manner that is consistent with their religious and ethical beliefs."
However, Dr. Deanna Dell of Durham, N.C., representing the American Medical Women's Association, said the issue wasn't about religion but about economic issues. "This is an issue about monopoly services. Once that hospital elects to become the only provider in an area and then takes what becomes a hidden agenda with regard to providing services for women in that community, then that institution is no longer entitled to the same things in places where it is not a monopoly."
The legislation reference committee which presided over the 90-minute debate will review the arguments, including a substitute proposal from the American College of Obstetricians and Gynecologists to soften the language of the resolution. The committee could recommend to the full House of Delegates of the AMA to either reject the resolution, accept the substitute resolution or refer the matter to committee for further study. The full delegate body which makes policy decisions for the AMA will get to vote on the issue later this week.

All rights reserved.

 

Back

 

 

Early treatment staves off diabetes in kids
SAN ANTONIO, Texas, June 12 (UPI)


New research underscores the value of prevention and treatment of diabetes in children, especially obese kids.
A study presented in San Antonio, Texas, at a diabetes conference shows that about 20 percent of obese children have signs of insulin resistance -- a hallmark for approaching diabetes. Further, in a separate study, scientists reported that children with type II diabetes benefit from tight blood sugar regulation, just as adults do.
Among 85 children from an obesity clinic in Connecticut, about 25 percent of 24 children who had not yet hit puberty were resistant to insulin -- a hormone that allows cells to absorb sugar from the blood. About 21 percent of 61 children who had already hit puberty showed signs of insulin resistance, said researcher Sonia Caprio of the Yale University School of Medicine in New Haven, Conn. "This is raising the question: We know there is borderline type II diabetes in these kids. Do we try to treat them to prevent it?" Caprio said at the 60th annual meeting of the American Diabetes Association.
Trials are currently underway in adults to see if getting insulin-resistant people to lose weight and exercise more, or using diabetes medications before they clinically develop the disease, can stave off the onset of diabetes, she said.
People with diabetes either do not produce enough or are resistant to the effects of insulin, and insulin resistance is considered a step along the road to diabetes. About 16 million Americans have diabetes.
Blindness, kidney failure, heart disease and amputations are common complications of the disease.
Strict control of blood sugar levels through an intensive intervention program targeted at lifestyle changes such as diet and weight and aggressive drug therapy if needed can stave off complications related to diabetes. These effects persist up to four years after the patients are returned to "normal" care with a primary care physician, said Neil White of the Washington University School of Medicine in St. Louis.
Among 164 diabetics who were under 18 when the intervention program began, those who received intensive therapy were 67 percent less likely to develop retinopathy, an eye disease that frequently leads to blindness, than were those teens who did not, White said.
"Intensive therapy is beneficial and should be started at an earlier stage in disease and at an earlier age," he said.

All rights reserved.

Back

 

 

Marital stress linked to development of diabetes
SAN ANTONIO, June 10 (UPI)


People experiencing stress because of their marriage were about twice as likely to develop diabetes as people not under the same pressures about their partnership, researchers reported at the 60th annual scientific meeting of the American Diabetes Association.
The researchers followed 1,733 people -- all of whom lived in or near San Antonio -- for seven to eight years. Of those people who initially reported feeling tense, annoyed, bored or angry when they thought of their spouse, about 18 percent developed diabetes over the course of the study, said Sharon P. Gaskill of the University of Texas Health Science Center at San Antonio. By comparison, 9 percent of those who reported being content or satisfied when they thought of their partner developed diabetes, she said.
The increased risk actually rose after the researchers took into account age, family history of diabetes, high blood pressure and abnormal blood lipid levels, all factors that increase the chance of a person developing diabetes, Gaskill said. "If our findings are confirmed by other studies...the risk of diabetes due to marital stress is close to that (posed by) hypertension," she said.
"There's no question that in a person at risk who is close to developing diabetes, significant stress could bring it out a little earlier," said Gerald Bernstein of Beth Israel Medical Center in New York and immediate past president of the American Diabetes Association. "But stress does not cause diabetes in and of itself."
Adult-onset, or type 2, diabetes affects nearly 16 million Americans. It is a condition in which the body does not make enough or is resistant to the effects of insulin, a hormone that helps sugar get into cells to provide energy. Hormones released when the body is under stress may counteract the effects of insulin, Bernstein said.
The extra burden might tip the scales towards diabetes-an inability to control blood sugar-in people who are already resistant to the effects of insulin. Regardless of the mechanism, stress is not something people or their doctors should ignore, Gaskill said. Other studies have shown that diabetics under stress have more trouble keeping their blood sugar under control. "Stress does not only affect whether a person will develop diabetes but how well it will be controlled," she said. "It's not enough in preventing or treating diabetes...to look just at blood sugar, hypertension and weight."
None of the study participants had diabetes initially; 194 people developed diabetes over the course of the study. About 150 of them were married, Gaskill said.

All rights reserved.

 Back

 

 

Migraine drug may offer hot flashes relief
By ALEX CUKAN, UPI


For millions of women suffering from hot flashes during menopause relief may come from a drug currently used to prevent migraines and seizures.
according to an article in the June 13 issue of Neurology.
"Anecdotally, (the drug) gabapentin has certainly been effective for patients who have tried it for hot flashes," said study author Dr. Thomas Guttuso Jr., a neurologist at the University of Rochester Medical Center in Rochester, NY. "It would be reasonable for patients suffering with menopausal or prescription-drug induced hot flashes to try gabapentin after consulting with their personal physician."
The study in the June 13 issue of the journal Neurology examines the cases of six patients who took gabapentin. Overall, the patients experienced an average 87 percent reduction in the frequency of hot flashes.
The first patient, a 52-year-old woman, reported 10 to 15 hot flashes per day following a hysterectomy and discontinuation of estrogen due to migraines.
Gabapentin was prescribed to prevent migraine. The woman's hot flashes stopped two days after starting the drug. To assess the drug's effect on the hot flashes, the woman agreed to stop taking gabapentin.
The first day off treatment the woman had 17 hot flashes. She resumed taking the drug the next morning and experienced no more hot flashes.
However, abrupt discontinuation can cause status epilepticus or an acute seizure episode and the drug should not be discontinued abruptly without a physician's consent.
This drug may produce side effects that impair mental alertness, such as dizziness or sleepiness, and driving or operating machinery should be avoided if symptoms appear.
In addition, those taking the medication are warned to avoid consuming alcohol or other central nervous system depressants while taking the drug because they may intensify the side effects.
However, no long-term or harmful side effects have been reported. "Estrogen therapy is currently the main treatment for hot flashes and has proven to be very effective in both medical studies and clinical practice," said Guttuso.
"However, the decision-making processes concerning estrogen therapy recommendations have become one of the most controversial topics in medicine today. Gabapentin therapy may prove to be a safe and effective alternative treatment for hot flashes in women who are medically unable to take estrogen therapy or in women whom decide against estrogen therapy for personal reasons."
Hot flashes, the most commonly reported symptom related to menopause, are experienced by up to 85 percent of menopausal women. Hot flashes occur when there is a decrease in previously well established circulating estrogen levels.
During menopause the decline in estrogen is thought to affect the temperature control center in the brain, resulting in a turning on of the body's heat-losing mechanism.
Blood flow is directed to the skin, which causes a visible flush, a sensation of heat, perspiration and a measurable drop in body temperature.
Hot flashes usually decrease in severity over the first two to three years after menopause and in the majority of women subside after five years.
However, up to one-third of women report hot flashes occurring for more than five years.
Estrogen replacement therapy is often recommended for the management of hot flashes and night sweats for women who lives are disrupted from the symptoms.
However, taking estrogen can promote breast cancer, and endometrial or uterine cancer. Adding a progestin, a progesterone-like substance, to estrogen reduces the cancer risk.
"Taking estrogen replacement therapy with progestin for the five or less years that menopausal symptoms appear is a low risk. The chance for cancer is about 4 per 1,000," Dr. Mary Sano, an associate professor at the Columbia University Medical School, told United Press International. "However, taking hormone replacement therapy to prevent the risk of heart disease or osteoporosis is a balancing act. The cancer risk is about 20 to 40 per 1,000 for long-term use after menopause, but if a woman is at risk for bone loss or heart disease she may choose taking the hormone replacement therapy if she's not at risk for breast cancer."
Guttuso also examined the case of a 38-year-old man with a history of childhood tuberculosis meningitis resulting in severe mental retardation, seizures and hypothalamic dysfunction causing hypothermia (a dramatic reduction in body temperature) that occurred about once every two years.
Gabapentin was prescribed for seizure control. Over the following six months, the man had 23 episodes of hypothermia and the drug was discontinued and the next hypothermic episode occurred 18 months later.
"Although this is only one case report of hypothermia associated with gabapentin use, it would be wise for physicians to avoid gabapentin treatment in patients with known hypothalamic dysfunction with episodes of hypothermia," cautioned Guttuso.
A clinical trial to test gabapentin's effect on hot flashes is currently underway.

Copyright 2000 by United Press International.
All rights reserved.

Back

 

FOOD ALLERGY PATHWAY DISCOVERED


Researchers at Children's Hospital Medical Center of Cincinnati have identified a critical pathway that plays a key role in the development of food allergy. The discovery, published in the June 6 edition of Proceedings of the National Academy of Sciences, could lead rapidly to clinical trials of new drugs. They found that the inflammatory response involved in allergic intestinal inflammation is governed by eotaxin, a protein. Eotaxin belongs to a family of molecules called chemokines, which acts to recruit eosinophils, a type of cell normally found in the blood, into inflammatory tissue. "Since agents that block eotaxin and similar chemokines are being actively developed by a number of pharmaceutical companies, these studies provide impetus for rapidly applying these new drugs to gut allergy," says Dr. Marc E.
Rothenberg, the study's senior author. Allergic diseases have reached epidemic proportions, inflicting nearly 30 percent of the population of most countries throughout the world a doubling in recent decades.
All rights reserved.
UPI

Back

 

 

BODY'S ANTIBODIES REPAIR NERVE SYSTEMS

Two antibodies, produced naturally by the human body, have the power to repair damage to the central nervous system according to scientists at the Mayo Clinic. The finding may open a new door in the search for treatments for multiple sclerosis and other paralyzing illnesses. In a study appearing in Tuesday's issue of the Proceedings of the National Academy of Sciences, researchers appeared to repair damage to the myelin sheath. The myelin sheath is a a coating consisting of a white fatty substance that protects the spinal cord in the same way insulation protects electrical wire. Damage to myelin, from accident or from disease, can prevent nerve impulses from passing through, leading to numbness, weakness and paralysis. "In the past it was thought that damage to myelin was permanent, and repair to myelin was not possible, but now, we know that antibodies, found in all of us, can be used for myelin repair," says neurologist Moses Rodriguez.
All rights reserved.
UPI

Back

 

 

POLIO VIRUS KILLS BRAIN TUMORS

Scientists say they have geneticallyaltered the polio virus and turned it into a weapon against brain cancer. In a report in Tuesday's issue of the Proceedings of the National Academy of Sciences, a team of cancer nvestigators replaced part of the polio virus with one of the bugs that cause common colds -- a rhinovirus. The altered polio virus was designed to bypass healthy tissues of the central nervous system, and head straight for the cancer. The gene-altered polio virus was injected into 25 mice with the brain tumor -- malignant gliomain. In 18 mice, the tumors disappeared after a single injection. However, in a commentary on the study, Eric Holland of the Houston-based M.D. Anderson Cancer Center, says that this is not the first time scientists have used viruses to kill brain cancers. One method, involving the use of a herpes virus looked promising in animal studies, but failed in human trials.
All rights reserved.
UPI

 Back

 

 

SOUNDING OUT INTERNAL INJURIES

Internal bleeding is only currently treatable through surgery, but that carries its own risks. Soon, physicians may be able to use high intensity ultrasound beams to treat internal injuries, according to a report in this week's New Scientist. A team from the University of Washington in Seattle has found that these beams can accelerate natural clotting mechanisms, sealing up wounds without harming tissue. The sound waves cause increased movement of the blood, which simulates an open wound environment and causes platelets to respond by sticking to membranes and each other, and thus initiating
clotting. The technique could provide an alternative when cauterizing internal wounds is too dangerous. "It's a phenomenon we are really excited about," says team member Lawrence Crum.
All rights reserved.
UPI

Back

 

PAP-LIKE SCREEN CAN FLAG ANAL CANCER


In the same way that Pap smears have slashed the incidence of cervical cancer by 80 percent, scientists say a similar test could save the lives of thousands of gay men in the earliest
stages of anal cancer. A cause of both types of cancer is human papillomavirus, a viral infection that is transmitted sexually. Dr. Sue Goldie and colleagues at the Harvard School of Public Health say the swab is a simple and inexpensive procedure. Should its results come back positive for abnormal or cancerous cells, the early detection would likely allow removal of any lesions before the cancer becomes serious. Each year, some 35 gay men per 100,000 develop anal cancer -- approximately the pre-Pap statistics for cervical cancer, the researchers say. Their study is published in the American Journal of Medicine.
ELIZABETH MANNING, UPI
All rights reserved

Back

 

 

MEDIA DON'T REPORT NEW DRUGS ACCURATELY

A study published in the New England Journal of Medicine concludes that newspaper and television reporters aren't doing a good job when it comes to describing new drugs. Co-author Lisa Bero says, ""The media perform a vital service to the public when they accurately report drug benefits and risks and when they identify potential conflicts of interest of experts quoted." Unfortunately, continues the University of California, San Francisco, pharmacy professor, 40 percent of 207 randomly selected stories did not quantify a drug's benefits at all. And of those that did, 83 percent couched them in relative and misleading terms such as "a 50 percent reduction" rather than absolute terms such as "a reduction from 2 to 1 percent." The researchers also say 53 percent of the stories did not describe potential side effects or complications. Finally, the study found that 60 percent of news reports did not mention any financial ties, possible conflicts of interest, between an expert cited andthe new drug.
ELIZABETH MANNING, UPI
All rights reserved

Back

 

 

DOCTORS RECORD 'FEEL' FOR VIRTUAL RE-EXAM

Doctors may soon be able to recreate the 'feel' of their patients for further reflection, to get a second opinion or to teach students, say engineers at the University at Buffalo. Thenkurussi Kesavadas and colleagues say it's all about virtual reality. Physicians will don a custom-made glove containing sensors in its fingertips. "While the physician is doing a palpation on a patient, the computer -- through the VR glove -- is picking up all the information about what anatomic-force characteristics the doctor's finger is feeling," says Kesavadas. Once in the computer, doctors can recreate the examination whenever they like. The research team will describe their progress at the World Congress on Medical Physics and Biomedical Engineering in July, but hope to have some devices available within about three years.
ELIZABETH MANNING, UPI
All rights reserved

 Back

 

 

MORNING SICKNESS MIGHT BE USEFUL

Now for a silver lining around a miserable cloud: Evolutionary biologists studying pregnancy outcomes suggest that morning sickness may be nature's way of protecting an unborn child from pathogens or chemicals its mother may ingest. Samuel Flaxman and PaulSherman of Cornell University report their study in the Quarterly Review of Biology. They say their analysis found that women who experienced morning sickness -- particularly those who actually vomited in addition to feeling nauseated-were significantly less likely to miscarry than those who did not.
The researchers point out that symptoms typically peak in the very weeks that the fetus is undergoing its most crucial development. Their hypothesis may also explain why many pregnant women develop an aversion to meat, eggs and certain vegetables -- menu items that might harbor food-borne illnesses or natural plant toxins. Flaxman says, "We should change the name to wellness insurance," while noting that many healthy babies are born to women blissfully unacquainted with morning sickness.
ELIZABETH MANNING, UPI
All rights reserved

Back

MAY 2000 News

 

Updated 29 August 2005
DoctorInternet | Enquiry Form | E-Mail
©1998, DoctorInternet - All material Protected by copyright
This site has been developed by A&R LTD