Expression of GADD45B in Renal Tissue of Children with IgA Nephropathy and Correlation with Mesangial Hypercellularity

Background: We correlated the expression of growth arrest and DNA damage-inducible protein beta (GADD45B) in renal tissue with IgA nephropathy (IgAN) with clinical characteristics and mesangial hypercellularity. Materials and methods: Biopsies from IgAN children were divided into M0 and M1 groups based on the Oxford classification, and biopsies with minimal change disease (MCD) were selected as controls. The mesangial cell proliferation area was evaluated on PAS-stained tissues, and the relative level of GADD45B in renal tissue was assessed by immunohistochemical staining (IHC). Results: Compared with the MCD group, levels of GADD45B in the M0 and M1 groups were significantly higher (p < 0.05). Levels of GADD45B positively correlated with mesangial cell proliferation, proteinuria, and total cholesterol, negatively correlated with Alb levels. Conclusions: It is suggested that high expression of GADD45B may play a regulatory role in mesangial hypercellularity.