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Cross-Over Study Comparing Postprandial Glycemic Increase After Addition of a Fixed-Dose Mitiglinide/Voglibose Combination or a Dipeptidyl Peptidase-4 Inhibitor to Basal Insulin Therapy in Patients with Type 2 Diabetes Mellitus

Noriko Ihana-Sugiyama, Ritsuko Yamamoto-Honda, Takehiro Sugiyama, Tetsuro Tsujimoto, Masafumi Kakei, Mitsuhiko Noda

(Department of Diabetes, Endocrinology and Metabolism, National Center for Global Health and Medicine Center Hospital, Tokyo, Japan)

Med Sci Monit Basic Res 2017; 23:36-44

DOI: 10.12659/MSMBR.902218

BACKGROUND: Although the efficacy of combination therapy consisting of basal insulin and oral hypoglycemic agents (OHAs) has been shown, which OHAs are the most efficient remains unclear.
MATERIAL AND METHODS: Five patients with type 2 diabetes were enrolled and treated with insulin degludec and metformin as a basal therapy. The patients were randomized in a cross-over fashion to receive a combination of mitiglinide (10 mg) and voglibose (0.2 mg) (M+V) 3 times daily or linagliptin (5 mg) (L) once daily for 8 weeks. After 8 weeks, 2 kinds of meal tolerance tests were performed as breakfast on 2 consecutive days. The first breakfast contained 460 kcal (carbohydrates, 49.1%; protein, 15.7%; fat, 35.2%), while the second contained 462 kcal (carbohydrates, 37.2%; protein, 19.6%; fat, 43.2%). Self-monitoring blood glucose levels were measured at 0, 30, 60, and 120 min after the meal tests, and the increase in the postprandial area under the curve (AUC)0–120 min was determined. The HbA1c, glycated albumin, and 1,5-anhydroglucitol (AG) levels were measured, and continuous glucose monitoring was performed.
RESULTS: The increase in the postprandial AUC0–120 min was significantly smaller in the M+V group than in the L group after both meals. The 24-h average, 24-h standard deviations, 24-h AUC, and mean amplitude of glycemic excursion (MAGE) were similar for both groups and after both meals. The change in 1,5-AG was higher in the M+V group than in the L group.
CONCLUSIONS: The combination of M+V with basal therapy improved postprandial glucose excursion more effectively than L in T2DM patients.

Keywords: Dipeptidyl Peptidase 4, Hyperglycemia, Incretins

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