Effect of PMA and IL-1 on matrix proteins with special reference to kidney mesangial cells.

Cytokines have different effects on the extracellular matrix proteins which were produced by a number of different cell lines. The extracellular matrix proteins fibronectin, collagen IV, vitronectin, laminin, proteoglycan, fetal proteoglycan and actin; and the cells human mesangial, BeWo, Hep G2 and BHK using APAAP and dot-blot assay were used. It was shown that IL-1 and PMA increased the staining intensity of proteoglycan, fibronectin and collagen IV and vitronectin and did not alter the intensity of staining. While PMA and IL-1 decreased but did not alter laminin, PMA increased the staining intensity of proteoglycan in mesangial cells but not altered in mesangial cells stimulated with IL-1. These results show that PMA and IL-1 altered the production and secretion of extracellular matrix proteins, these in turn could lead to the alteration of pore size, matrix properties and filtration of mesangial cells, and thus influence pathological conditions of renal diseases.