Scientists develop antidote for new class of drugs

A new compound can quickly counteract the action of an emerging class of drugs, offering a way to reverse the drugs’ actions if a patient develops serious side effects, U.S. researchers said on Sunday.

They designed the compound to work with a new blood-thinner being developed for heart patients undergoing angioplasty to clear out blocked arteries.

Such patients need to take blood thinners to prevent blood clots during surgery, but bleeding is a common side effect.

Having an antidote on hand would make the treatments safer, said Bruce Sullenger of Duke University Medical Center, whose study was published in the journal Nature Medicine.

But instead of just reversing the effects of the blood thinner, the antidote agent appears to work against a whole new class of drugs called aptamers.

“Most drugs target proteins. The type of drugs we’re talking about are ribonucleic acids (RNAs) that target proteins,” Sullenger said in a telephone interview.

“Normally in our body we don’t have these types of molecules outside of cells,” Sullenger said.

The antidote agent takes advantage of this, targeting only nucleic acid compounds circulating freely outside the cells.

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Study finds potential way to make an AIDS vaccine

The discovery of immune system particles that attack the AIDS virus may finally open a way to make a vaccine that could protect people against the deadly and incurable infection, U.S. researchers said on Thursday.

They used new technology to troll through the blood of 1,800 people infected with the AIDS virus and identified two immune system compounds called antibodies that could neutralize the virus.

And they found a new part of the virus that the antibodies attack, offering a new way to design a vaccine, they reported in the journal Science.

“So now we may have a better chance of designing a vaccine that will elicit such broadly neutralizing antibodies, which we think are key to successful vaccine development,” said Dennis Burton of The Scripps Research Institute in La Jolla, California, who led the study.

“The findings themselves are an exciting advance toward the goal of an effective AIDS vaccine because now we’ve got a new, potentially better target on HIV to focus our efforts for vaccine design,” added Wayne Koff of the International AIDS Vaccine Initiative, or IAVI, which sponsored the study.

Since the AIDS pandemic started in the early 1980s, more than 25 million people globally have died from the virus. The World Health Organization estimates that 33 million are currently infected.

There is no cure, although a cocktail of drugs can help keep the virus under control. Efforts to make a vaccine have failed almost completely.

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Scientists develop antidote for new class of drugs

Scientists develop antidote for new class of drugs

Study finds potential way to make an AIDS vaccine

Study finds potential way to make an AIDS vaccine