Furthermore, increased expression of ER stress markers (such as ER chaperones or CHOP) in glomeruli has been detected in kidney biopsy samples of patients with MN, MCD, FSGS and proliferative glomerulonephritis (Cybulsky, 2013; Lindenmeyer et al., 2008). This evidence concerns the gene DDIT3 and focal segmental glomerulosclerosis.