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Progress reported on drug to regrow hair

(CBS News) Researchers are reporting progress in the quest for a drug that can regrow hair.
In a study published Friday in the journal Science Advances, Dr. Angela Chistiano and colleagues at Columbia University Medical Center said they were able to grow hair in laboratory mice using two drugs already approved by the FDA.
One of the drugs, tofacitinib (Xeljanz), is used to treat rheumatoid arthritis, and the other is a blood cancer treatment called ruxolitinib (Jakafi). They're part of a class drugs known as JAK inhibitors.
Researchers discovered that when JAK inhibitors were applied as a topical solution directly to the skin, instead of taken orally, they triggered hair growth by activating cells in hair follicles…
[T]he treatment has not yet been tested on humans, and results that seem promising in lab animals don't always turn out to work in people. It's too early to know how the treatment would be formulated, how much a person would need to use, or what it would cost.
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