Background & Aims: Excess weight and type 2 diabetes lead to increased susceptibility to infections. Our aim was to investigate the role of diabetes-induced decreased arginine (Arg) availability and of a possible dysregulation of Arg metabolism in macrophages favoring inflammation and dysimmunity via altered nitric oxide (NO) and cytokine productions.
Methods: Isolated peritoneal macrophages from Zucker Diabetic Fatty (ZDF) or lean rats were incubated with increasing Arg concentration (0-2 mM) and Arg metabolism and regulatory properties were studied.