摘要Objective: To investigate the effects of DPP-4 inhibitor combined with metformin on blood glucose control, oxidative stress and inflammatory response in patients with type 2 diabetes mellitus (T2DM). Methods: A total of 138 patients with newly diagnosed T2DM who were treated in the hospital between March 2016 and April 2017 were divided into routine group (n=69) and combined treatment group (n=69) by random number table method. Routine group were treated with metformin alone and combined treatment group received DPP-4 inhibitor combined with metformin therapy. The differences in blood glucose control as well as oxidative stress-related indicator and inflammatory factor contents were compared between the two groups before and after treatment. Results: Before treatment, the differences in blood glucose index levels in peripheral blood as well as the oxidative stress index and inflammatory mediator contents in serum were not statistically significant between the two groups. After 4 weeks of treatment, blood glucose indexes FBG and HOMA-IR levels in peripheral blood of combined treatment group were lower than those of routine group; oxidative stress indexes MDA and LHP contents in serum were lower than those of routine group whereas GSH-Px and T-AOC contents were higher than those of routine group; inflammatory mediators hs-CRP, IL-1 and IL-6 contents in serum were lower than those of routine group. Conclusion: DPP-4 inhibitor combined with metformin therapy can effectively control the blood glucose and suppress the systemic oxidative stress and inflammatory response in T2DM paients.