Figure 1: The application of dipeptidyl peptidase-4 inhibitor to the virus genotypes 2 and 3. J Hepatol 48: 28-34. treatment for hepatitis C virus infection. Blank arrows indicate the potential effects of dipeptidyl peptidase 4 inhibitor. CXCL, C-X-C chemokine 10; DPP4, dipeptidyl peptidase 4; HCV, hepatitis C virus; IL-6, interleukin-6; TNF-α, tumor necrosis factor-α.