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July 9th, 2010
12:12 PM ET

Longevity study may have flaws

Last week CNN reported that scientists had identified 150 genes involved in living a very long life, and that researchers could predict with 77 predict accuracy who could live to 100.

But now some experts are saying that the researchers used a flawed DNA chip to get their results. Newsweek reports that this flaw could be addressed with follow-up research, using a different chip, but that the study authors should have done that before publication.

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July 9th, 2010
11:53 AM ET

Have your say on menu labeling requirement

How should the government carry out new requirements for all chain restaurants (that have more than 20 locations) to display calorie information on menus?

The Food and Drug Administration is seeking public comments on the new federal law that requires calorie content and nutritional information for foods sold in restaurants and vending machines. This was part of the sweeping health care reform law that passed in March. FULL POST


July 9th, 2010
11:49 AM ET

HIV antibody discovery a step toward vaccine

After years of disappointment, researchers have finally found a potential basis for an HIV vaccine.  Scientists at the National Institute of Allergy and Infectious Diseases  say they have discovered three human antibodies that neutralize more than 90 percent of the current circulating HIV-1 strains.

"This is significant because we've now found antibodies that are good templates for HIV vaccine development," explains Peter Kwong, chief of structural biology for the institute, and co-author of the study published Thursday in the journal Science. "You can potentially inactivate the virus," he says.

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July 9th, 2010
11:47 AM ET

FDA pokes holes in study defending Avandia

The Food and Drug Administration this morning posted a blistering analysis of a study on the popular diabetes drug Avandia, a study the drug’s maker has pointed to repeatedly as evidence that Avandia is safe. The study, known as RECORD, involved more than 4,447 patients and compared Avandia with two older diabetes drugs, metformin and sulfonylurea, and found no increased risk of heart problems. But the analysis by Dr. Thomas Marciniak says researchers repeatedly submitted sloppy data and failed to follow up on reports of problems in patients – including reports of patient deaths. He also called the design of the study “inappropriate and biased.” The end result was to provide a more favorable picture of Avandia than the data warrant, according to Marciniak.

His analysis was submitted last month to an FDA panel that next week will debate the fate of Avandia, which other studies have linked to an increased risk of heart attacks, stroke and heart failure. It was posted today by the FDA, along with other materials the panel will consider during its meeting next week.

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July 9th, 2010
11:17 AM ET

Heart imaging may expose patients to unneeded radiation

Some patients undergoing nuclear stress tests for cardiac imaging may be exposing themselves to unnecessary radiation, says a new study published in the Journal of the American College of Cardiology.

An analysis found that nearly one  out of every 10 patients under age 65 had at least one cardiac imaging procedure over a three-year period, which exposed them to high doses of ionizing radiation, a type of carcinogen.

"Clinicians and patients must consider tradeoffs between the benefits of cardiac imaging procedures and their potential long term risks due to radiation," say the authors say in the report.

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July 9th, 2010
10:32 AM ET

Triathlete ready, hopes to encourage others

Back in January, CNN selected six lucky viewers to compete alongside Chief Medical Correspondent Dr. Sanjay Gupta in the Nautica New York City Triathlon this July. Among the "six pack" was Meredith Clark, a newspaper columnist from Tallahassee, Florida.

When Meredith first sent in her iReport, she talked about her personal goals – losing weight and completing a triathlon by the time she was 30 – but also spoke of her desire to use the triathlon as a means to educate her peers.

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July 9th, 2010
02:00 AM ET

Obese kids at risk for acid reflux

Overweight and obese children are at risk for getting even more adult illnesses, researchers warn.

The Centers for Disease Control and Prevention estimates that 17 percent of children and teens ages 2-19 are obese in the United States. Previous studies have linked childhood obesity to high blood pressure and diabetes. Now a new study says overweight and obese kids face another illness usually seen in adults: Gastro-esophageal reflux disease or GERD.

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About this blog

Get a behind-the-scenes look at the latest stories from CNN Chief Medical Correspondent, Dr. Sanjay Gupta, Senior Medical Correspondent Elizabeth Cohen and the CNN Medical Unit producers. They'll share news and views on health and medical trends - info that will help you take better care of yourself and the people you love.

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