Sections

Alphabetical list:

A B C D E F G H I J K L M N O P R S T U V W X Y Q Z 1 2 3 4 5 6 7 8 9

News: November 23, 2009

Genetic Variant Slows AIDS Progression

November 23, 2009

Scientists report that a genetic variation appears to play a major role in slowing disease progression in HIV-infected patients.
In fact, those with the variation appear to take years longer to develop AIDS and die of complications of the disease.
"We're honing in on factors that vary across individuals that make a person more or less susceptible to HIV, in terms of how rapidly someone develops the disease," said study co-author Mary Carrington, a senior principal investigator at the U.S. National Cancer Institute.
However, this new knowledge won't translate into immediate benefits for patients with HIV.
AIDS remains a major killer in many parts of the world, but HIV - the virus that causes it - doesn't affect infected people the same way. "People progress to AIDS at hugely different rates," Carrington explained. "Some people progress within a year, while some have been infected for 20 years and still control the virus and don't have the disease."
It appears that three factors affect how the disease strikes a person, she said. One is the environment: the world in which a person lives. Another is the patient's genetic makeup. And the third is the genetic makeup of the virus itself.
In the study, published in the Nov. 22 online edition of Nature Genetics, Carrington and colleagues looked at genetic and medical records for hundreds of HIV-infected men. They were trying to see if genetic variations affected how the men fared.
The researchers found that a variation linked to higher levels of a protein known as HLA-C boosted the men's ability to avoid progressing to AIDS. It appeared to delay both the progression to AIDS and to death by years, Carrington said.
The genetic variation makes it easier for the immune system to kill cells that have been infected with the virus, she said. It does this by allowing immune cells to gain greater access to the infected cells, she explained.
Carrington said this genetic variation isn't related to another gene-related trait that makes some people virtually immune to HIV.
The study "hints at ways we might ultimately develop a vaccine or immune-based therapies that could modify or maybe even prevent the development of HIV disease," said Rowena Johnston, vice president of research with the Foundation for AIDS Research in New York City.
"The finding that a single piece of DNA can be strongly associated with something as complex as the control of HIV soon after infection is especially intriguing, not least because we know that early control of infection sets the stage for the entire course of the disease," Johnston noted.
What's next? The ultimate goal, Carrington said, is "to have a complete list of every genetic variance that is affecting how rapidly the disease develops."
That, in turn, could help physicians figure out how to better treat patients.


Archive issues: (50)

Archive list: 1 2 [3] 4 5 6 7 8 9 10 11 12 13 14 15 16 17

December 08, 2009 | Tamiflu May Be Inneffective In Fighting Effects Of Flu

Washington (SmartAboutHealth) - According to a new review, the popular Tamiflu is weak when it comes to the effect it has in preventing effects of the flu, such as the development of pneumonia.  The ...

December 7, 2009 | Surprised? Black market steroids usually mislabeled

The risks of anabolic steroids - used by some athletes to build muscle mass - are by now well-documented. But it turns out, perhaps not surprisingly, that steroids bought illegally through "underground labs" and over ...

December 6, 2009 | Prostate Hormone Therapy May Up Heart Risks

Diabetes, heart attacks and other cardiovascular problems appear to be more common in men with prostate cancer who are treated with androgen deprivation therapy, which reduces or eliminates the male sex hormones that can promote cancer growth, a new study has found.  The finding indicates that ...

Archive list: 1 2 [3] 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Related articles:

Alprostadil

  Alprostadil can be injected into the penis or inserted using a special applicator - usually just before sexual intercourse. Alprostadil has also become available in some countries as a topical cream (under the brand name Befar), and preliminary studies have shown a clinical efficacy of up to 83%. It has an onset of action of 10-15 minutes and its effects can last over 4 hours.    

Section: Erectile Dysfunction

Chronic prostatitis/chronic pelvic pain syndrome - treatment

  No treatment required. It is standard practice for men with infertility and category IV prostatitis to be given a trial of antibiotics and/or anti-inflammatories however evidence for efficacy are weak. Since signs of asymptomatic prostatic inflammation may sometimes be associated with prostate cancer, this can be addressed by tests that assess the ratio of free-to-total PSA. The ...

Section: Prostatitis

Symptoms

  The symptoms of IC/PBS are often misdiagnosed as a "common" bladder infection (cystitis) or a UTI. However IC/PBS has not been shown to be caused by a bacterial infection, and the mis-prescribed treatment of antibiotics is ineffective. The symptoms of IC/PBS may also initially be attributed to prostatitis and epididymitis (in men) and endometriosis and uterine ...

Section: Interstitial cystitis

News

December 20, 2009

Wii, Xbox 360 and Other Video Games Offer Some Benefits

Wii, Xbox 360, PlayStation, and other video games are hot on holiday gift lists, but some parents wonder whether these games offer any benefits or are detrimental to kids. The results of a new study may put some minds at ease, while others may not.  According to the findings reported in the latest issue of Current Directions in Psychological Science, regular gamers transfer their ...

December 18, 2009

Should You Be Shoveling Snow?

Yes, the weather outside is frightful, and soon you will have to think about shoveling snow. But should you be the one doing the work? Who should and should not shovel snow, and how can you do it safely?  Every winter, approximately 1,200 Americans die from a heart attack or another type of cardiac incident during or after a snowstorm, and shoveling snow is ...

December 17, 2009

Athletes who take NSAID's to prevent pain may be doing more harm than good

According to Stuart Warden, a researcher who studies musculoskeletal health and sports medicine, athletes who ritualistically take NSAID's to prevent post event and workout soreness and inflammation may be depriving the body of healing, in addition to risking ...

Blogroll