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Baldness caused by alopecia could soon be treatable

Baldness caused by alopecia could soon be treatable

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Baldness caused by alopecia areata could soon be treated safely and effectively, after an international University of Melbourne-led trial found two new drugs to be safe and effective.

Until now there has been no effective treatment for the debilitating condition that causes patchy hair loss and affects up to 147 million people globally. About 15 per cent of people with the condition experience total or universal hair loss.

The Phase 2a, randomised placebo-controlled study evaluated the efficacy and safety of two drugs known as Janus Kinase (JAK) Inhibitors, PF-06651600 and PF 06700841, in alopecia areata over 24 weeks.

The treatment program found both medications were effective, well tolerated by patients and safe. While promising, the results are yet to be peer reviewed or published.

University of Melbourne Professor of Dermatology Rodney Sinclair presented the findings at the 27th Congress of the European Academy of Dermatology and Venereology in Paris on Saturday, 15 September.

Professor Sinclair said new molecules used in the trial drugs had also been tested for atopic dermatitis, but this was the first trial conducted in alopecia. He said the latest results were potentially life-changing for those living with alopecia.

“This is a game changer,” he said. “Both compounds performed significantly better than placebo in patients with alopecia totalis and alopecia universalis. Both JAK inhibitors were safe and well tolerated.”

Professor Sinclair said the new drugs inhibited alopecia’s progression and allowed hair to regrow.

“Other medications that target this pathway have been used to treat rheumatoid arthritis and to correct blood disorders,” he said. “Some of these drugs also work in eczema, psoriasis and a range of other inflammatory and autoimmune conditions.”

Professor Sinclair said several patients in the trial experienced adverse events, including infections, gastrointestinal and skin/subcutaneous tissue issues. Two experienced a serious adverse event (rhabdomyolysis) but the patients were asymptomatic and recovered completely when the medication was ceased. There were no serious infections or herpes zoster reactivation.

The first trial has closed but suitable patients may be able to join Phase 3 trials due to start in the next six to twelve months. Patients can check their eligibility with their dermatologist.

The trials involve clinics and universities in Victoria, New South Wales, Queensland, Manitoba, Ontario, Alabama, California, Colorado, Connecticut, Florida, Georgia, Illinois, Indiana, Massachusetts, New York, Oklahoma, South Dakota, Utah and Virginia.

Pfizer sponsored and collaborated on the project, which involved patients aged 18-75 with chronic and moderate to severe alopecia areata affecting their scalp.

What are Janus Kinase inhibitors and how are they used to treat alopecia?

Autoimmune diseases, allergies, and even malignancies are often due to a persistent imbalance within complex immune mechanisms. The actions of several cytokines underlie these complex processes, as they play a critical role in the control of the immune responses and inflammatory processes.

Several studies have linked various cytokines, and the receptors or molecules involved in their chemical reactions, to immune-mediated and inflammatory diseases. Therefore, cytokine function modulation has been the focus of intensive research and drug development. Drugs targeting cytokines or their receptors have become the main weapon of physicians dealing with autoimmune diseases such as alopecia areata.

The four JAKs (JAK1, 2, 3 and TYK2) have been shown to be critical components of cytokine-mediated effects.


Explore further:
What causes alopecia areata and can you treat this type of hair loss?

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