TNF and Nephropathy: Cytokines of the TNF family [35,36,37], TNF SNPs [38,39], IL-6 serum levels [40,41], and IL6 gene SNPs [42,43,44], as well as macrophage inhibiting factor (MIF) and MIF gene variants [45,46,47,48], might play a role in favoring kidney damage and have been studied.