Dermatomyositis diagnostic method and diagnostic kit

摘要

An object of the present invention is to identify a corresponding antigen of an anti-CADM-140 antibody, to produce a recombinant protein, and to establish a measurement system by ELISA or the like. The present invention provides a diagnostic kit for dermatomyositis comprising the MDA5 protein represented by SEQ ID NO: 4 or a fragment thereof recognized by an anti-CADM-140 antibody.