Drugs containing an activity regulator of CD300a expressing cells related to allergic diseases, and use of CD300a gene-deficient mice and CD300a expressing cells

摘要

The present invention provides medicaments for allergic diseases (atopic dermatitis, asthma, and the like), and a tool useful for pathology analysis of allergic diseases. A medicament containing as an effective component an activity modulator for suppressing inhibitory signal transduction of a CD300a-expressing myeloid cell, which activity modulator contains a substance that inhibits binding of CD300a to phosphatidyl serine, can be used for treatment or prophylaxis of an allergic disease. A CD300a gene-deficient mouse can be used as a model mouse in which the allergic disease is hardly induced after administration of a substance that induces the allergic disease, which may be used for carrying out pathology analysis of an allergic disease, or for screening of a possible candidate substance for an effective component of a therapeutic agent or prophylactic agent for the disease.