About Cathepsin S & Autoimmune Diseases

Cathepsin S plays a key role in the pathology of autoimmune disease and in the maintenance of neuropathic pain. Genetic and pharmacologic inhibition of cathepsin S results in amelioration of disease in pharmacology models.

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Cathepsin S inhibitor: VBY-285

VBY-285 is a next generation cathepsin S inhibitor. It is structurally distinct from the cathepsin S inhibitors, VBY-129, VBY-891 and VBY-036.

VBY-285 is a potent, competitive and reversible inhibitor of purified cathepsin S. It has picomolar inhibitory potency against the cathepsin S enzyme and nanomolar inhibitory potency in cellular assays. VBY-285 is selective against other human cathepsins (B, F, L and K). Sustained cathepsin S inhibition after oral dosing has been demonstrated in vivo through the use of a biomarker.  VBY-285 shows potent inhibitory activity in models of autoimmunity and neuropathic pain.

VBY-285 is orally bioavailable in preclinical pharmacokinetic studies.