Our objective was to study the indices of tumor necrosis factor-α (TNF-α), C-reactive protein (CRP), adiponectin, leptin, and resistin as links for triggering the mechanisms of development and progression of the low-grade chronic systemic inflammatory response in chronic pancreatitis (CP) patients with type 2 diabetes mellitus (T2DM). The gene discussed is RETN; the disease is diabetes mellitus.