Re­gen­eron/Sanofi's an­ti­body un­der­whelms in asth­ma study — shares of ri­val Anap­tys­Bio pay the price

Al­though ex­pec­ta­tions were mut­ed, Re­gen­eron $REGN and Sanofi’s $SNY ex­per­i­men­tal IL-33 an­ti­body has un­der­whelmed in a proof-of-con­cept mid-stage asth­ma tri­al. Al­though the drug sig­nif­i­cant­ly im­proved the loss of asth­ma con­trol and lung func­tion as a monother­a­py com­pared to a place­bo, its ef­fect was nei­ther su­pe­ri­or to the es­tab­lished Dupix­ent, nor of val­ue when com­bined with the IL-4/IL-13 treat­ment.

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