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June 2012
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Studies: New drugs greatly lower cholesterol


WASHINGTON - A new class of experimental medicines can dramatically lower cholesterol, raising hopes of a fresh option for people who can't tolerate or don't get enough help from Lipitor and other statin drugs that have been used for this for decades.

The first large studies of these drugs were presented Saturday at an American College of Cardiology conference in Washington, and more will follow Sunday.

Several companies are developing these drugs, which are aimed at 70 million Americans and millions more worldwide who have high LDL or "bad" cholesterol, a major risk for heart disease.

Three studies of Amgen Inc.'s version of these drugs, called evolocumab, found it lowered LDL or "bad" cholesterol by 55 to 66 percent compared to a fake drug, and by nearly that much when compared to Merck's Zetia, another cholesterol medication.

As impressive as that is, it's still just part of the picture. Doctors want evidence that the way these drugs lower cholesterol also will lead to fewer heart attacks and deaths, because that proof already exists for statins. New studies are underway to test this, but Amgen said it will seek approval for its drug this year based on cholesterol-lowering alone.

That was enough to win approval for statins and Zetia, but use of Zetia has declined since 2008, when research showed it failed to help prevent heart attacks even though it cut cholesterol. Hopes are high that the new Amgen drug and others like it will do better.

"I would be happy to see it approved" on the cholesterol results alone, said Dr. Hadley Wilson, a cardiologist at Carolinas HealthCare System. "We need additional agents other than statins" to help patients, he said.

Nearly all current cholesterol medicines - fibrates, niacin and top-selling statins - are decades old. Statins such as Lipitor, Zocor and Crestor curb cholesterol production. Zetia, which came out about a decade ago, helps block the absorption of cholesterol from the intestine.

The new drugs block PCSK9, a substance that interferes with the liver's ability to remove cholesterol from the blood.

They have big drawbacks, though. Statins are pills sold as generics for as little as a dime a day. The new drugs are proteins rather than chemicals, and those tend to be very expensive to make. They also must be given as shots every two weeks or once a month. People can give the shots to themselves with a pen-like device. The companies developing the new medicines have not said what they might cost.

The three Amgen studies involved about 2,000 patients in all. Doctors tested the drug in people with high cholesterol not taking other medicines, as a long-term (one-year) treatment in people already taking various medications and in combination with statins and other drugs in people with an inherited cholesterol disorder.

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