Method for screening blood IgA production inhibitor or preventive or therapeutic agent for diseases caused by excessive IgA in blood

摘要

A screening method suitable for screening for a blood IgA production inhibitor, a blood IgA production promoter, or a preventive or therapeutic agent for a disease caused by excess blood IgA, a blood IgA production inhibitor, and a blood IgA production promoter A method suitable for controlling the amount of IgA in the blood and a method for assessing the risk, degree or condition of the disease caused by excess IgA in the blood, and removal for preventing or treating the disease caused by excess IgA in the blood Provided is a method for presenting at least one selected from the group consisting of enterobacteria to be administered and enterobacteria to be administered. Inhibition of expression of antibacterial protein gene of intestinal innate immunity system, promotion of expression or activity of said antibacterial protein, or increase in reaction of said antibacterial protein as an index For screening for preventive or therapeutic agents for diseases caused by the disease.