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  • Title: Efficacy and safety of tofogliflozin in Japanese patients with type 2 diabetes mellitus with inadequate glycaemic control on insulin therapy (J-STEP/INS): Results of a 16-week randomized, double-blind, placebo-controlled multicentre trial.
    Author: Terauchi Y, Tamura M, Senda M, Gunji R, Kaku K.
    Journal: Diabetes Obes Metab; 2017 Oct; 19(10):1397-1407. PubMed ID: 28371205.
    Abstract:
    AIMS: To assess the effects of 16 weeks of tofogliflozin (sodium-glucose co-transporter-2 [SGLT2] inhibitor) treatment vs placebo on glycated haemoglobin (HbA1c) levels in Japanese patients with type 2 diabetes mellitus (T2DM) inadequately controlled with insulin monotherapy or insulin plus a dipeptidyl peptidase-4 (DPP-4) inhibitor. METHODS: The study comprised a 16-week, multicentre, double-blind, placebo-controlled period and a 36-week extension (NCT02201004). Men and women (aged ≥20 and ≤75 years) with T2DM (HbA1c ≥7.5% and ≤10.5%) were randomized 2:1 to tofogliflozin 20 mg once/day or placebo. The primary endpoint was change in HbA1c from baseline. Insulin reduction was not permitted during this study. RESULTS: A total of 211 patients were randomized (141 tofogliflozin, 70 placebo). Addition of tofogliflozin to insulin therapy was significantly superior to placebo for lowering HbA1c (-0.59 vs +0.48%; P < .0001), fasting plasma glucose (-27.2 vs +5.3 mg/dL; P < .0001), postprandial plasma glucose (-65.0 vs +3.2 mg/dL; P < 0.0001), serum uric acid (-0.18 vs +0.07 mg/dL; P = .0062), body weight (-1.34 vs +0.03 kg; P < .0001) and daily insulin dose (-1.3 vs -0.2 U, P = .0152). Hypoglycaemia occurred in 30.7% of patients receiving tofogliflozin vs 21.4% for placebo. Two patients treated with tofogliflozin each had a genital or urinary tract infection. CONCLUSIONS: This 16-week double-blind study indicated that, in patients with T2DM whose HbA1c levels were poorly controlled with insulin monotherapy or insulin plus a DPP-4 inhibitor, addition of tofogliflozin was an effective treatment option with an acceptable safety profile.
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