Diseases with primary podocytopathies (MCD and FSGS) and cases with secondary podocytopathies due to sub epithelial immune complex formation (MGN) and mesangial immune complexes (IgAN) were not different in terms of expression of beta dystroglycan which is one of the integrins involved in podocyte basement membrane interaction. This evidence concerns the gene DAG1 and idiopathic membranous glomerulonephritis.