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Home - Findings - A Sickle Cell Milestone

A Sickle Cell Milestone

Work that began at OMRF in the 1980s gives birth to a life-changing medication

 

When Novartis announced in November that the U.S. Food and Drug Administration had approved the company’s new drug to treat sickle cell anemia, the press release didn’t mention Oklahoma. But it should have. The drug, known as Adakveo, is based on discoveries made by OMRF physician-scientist Dr. Rodger McEver.

The FDA’s decision came following a 52-week clinical trial showing treatment with the drug led to a significant reduction in pain crises for sickle cell patients. Adakveo is now available in hospitals and clinics in the U.S., with European approval currently pending.

“I’ve treated sickle cell patients, and their suffering is extreme,” says McEver, a hematologist and OMRF’s Vice President of Research. “It’s the dream of every physician, and certainly every scientist, to do something that can make a difference with patients.”

In sickle cell disease, red blood cells change from their customary round or oval shapes to form a crescent or “sickle.” The cells stack up in vessels, causing inflammation and excruciating pain. In some cases, the condition leads to organ damage, stroke and even death.

While the condition affects people of all races, it’s most prevalent in those of African heritage, who make up 90 percent of the sickle cell population. Health authorities estimate that 100,000 people in the U.S. and more than 1 million worldwide suffer from the disease.

In the lab, McEver developed an antibody that blocks the effects of P-selectin, a protein thought to be a driver in the development of pain crises for sickle cell patients. To explore clinical applications in humans, McEver helped create an Oklahoma-based biotechnology company, Selexys. The company fine-tuned the antibody, making an experimental drug that bound to human P-selectin and blocked the protein’s function.

The medication showed a 45 percent reduction in pain crises when administered intravenously every 4 weeks in a clinical trial involving 198 sickle cell patients. Based on those results, Novartis purchased Selexys and its experimental drug, now known as Adakveo.

“We know this drug can decrease the frequency of sickle cell pain crises in a significant and clinically meaningful way,” says Dr. Kenneth Ataga, who led the trial and serves as director of the Center for Sickle Cell Disease at the University of Tennessee Health Science Center at Memphis. The drug’s approval, he says, “is an important advancement for people living with this very difficult condition.”

For McEver, the drug represents the culmination of research that began in his lab more than three decades ago. “Pushing forward the body of knowledge is important,” he says. “I hope this drug will help a lot of patients.”

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