XBiotech Announces First Patient in Phase 2 Study Evaluating MABp1 in Patients with Atopic Dermatitis

First Patient Begins Therapy with MABp1 for Treatment of Atopic Dermatitis

XBiotech Inc. (NASDAQ:XBIT) announced today that the first patient has been enrolled in its Phase 2 open label, dose escalation clinical study evaluating MABp1 in patients with moderate to severe Atopic Dermatitis (AD). The patient began treatment at Florida Academic Dermatology Center under the care of the Study’s Chair, Dr. Francisco Kerdel.

Dr. Kerdel commented, “Atopic dermatitis is a chronic inflammatory disease characterized by dry and scaly skin and severe, unrelenting itching. An inflammatory substance released by keratinocytes known as IL-1alpha, is believed to be a key trigger of inflammation in the disease. By neutralizing the activity of IL-1alpha, the new agent we are testing may arrest the disease process and offer relief from the debilitating symptoms. Today we treated a patient and I can report that within one hour of treatment, there was an unequivocal reduction in erythema [redness of the skin] and the patient reported an almost immediate reduction in associated pruritus [itching]. This is an extremely intriguing start for this promising therapy.”

John Simard, the Company’s President and CEO, added, “Interleukin-1alpha is emerging as a key therapeutic target in inflammatory skin diseases. We are extremely excited about the potential of our antibody to represent a breakthrough treatment for atopic dermatitis.”

XBiotech is developing a human-derived antibody which neutralizes IL-1 alpha (IL-1alpha), an inflammatory cytokine that plays a key role in the pathophysiology of a wide range of inflammatory skin disorder1. Three phase II studies sponsored by XBiotech have been completed in dermatologic indications (acne, psoriasis, pyoderma gangrenosum) as well as one investigator sponsored study in Hidradenitis Suppurativa. In these studies, MABp1 was well tolerated and showed good therapeutic responses2,3,4.

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