Rats were fed for 16, 24, and 32 weeks and then kidney tissues were collected, which showed that the rates of IgA nephropathy-like glomerulonephritis lesions evaluated by histopathological and immunochemical staining using an anti-IgA antibody were 4.2% (1/24), 26.1% (6/23,) and 51.7% (15/29), respectively. Here, CD79A is linked to IgA glomerulonephritis.