De novo cyclin A staining was observed in podocytes of children collapsing glomerulopathy [68] and FSGS [69]; in cellular lesion of FSGS positive signals were also reported for cyclin D [70]; an altered expression of 27 and p21 was reported in patients with minimal change disease, collapsing glomerulopathy and FSGS [70]. This evidence concerns the gene CCNA2 and focal segmental glomerulosclerosis.