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    Glucagon-like peptide (GLP)-1 receptor agonists exert potent hypoglycemic effects in patients with type 2 diabetes (T2D) in a blood glucose concentration-dependent manner. Once-weekly subcutaneous administration of the GLP-1 receptor agonist semaglutide has beneficial effects on glycemic and body weight control, but it is currently unclear if semaglutide provides superior glycemic control compared to conventional GLP-1 receptor agonists in the Japanese population. We aim to compare the effects of once-weekly subcutaneous semaglutide with those of liraglutide or dulaglutide administration in Japanese patients with T2D. This study is a multicenter, prospective, randomized, open-label, blinded-endpoint, parallel-group trial. In total, 100 participants with T2D who have been treated with liraglutide (0.9-1.8 mg/day in plan A) or dulaglutide (0.75 mg/week in plan B) for more than 12 weeks and have a glycated hemoglobin (HbA1c) level of 6.0-9.9% and a body mass index (BMI) of ≥ 22 kg/m2 will be randomized to either continue using their existing GLP-1 receptor agonist or switch to subcutaneous semaglutide once weekly for 24 weeks. Biochemical analysis, physical assessment, and a quality-of-life questionnaire (DTSQ) will be completed at baseline and at the end of the study. The primary endpoint is the effect of semaglutide on the change in HbA1c. The secondary endpoints are the mean changes in total DTSQ score, body mass, abdominal circumference, systolic and diastolic blood pressure, pulse rate, factors associated with improvement in HbA1c and secondary endpoints, side effects, and other laboratory parameters. The results of the study will provide useful information regarding the effects of switching to semaglutide from other GLP-1 receptor agonists on glycemic control in patients with T2D. The Hokkaido University Certified Review Board (CRB no. 1180001) has approved the protocol (no. 018-005). The results will be disseminated in peer-reviewed journals and at scientific conferences. UMIN000042369 in the University Hospital Medical Information Network (UMIN); jRCT1011200008 in the Japan Registry of Clinical Trials (jRCT); pre-results.


    Hiroshi Nomoto, Chiho Oba-Yamamoto, Yuka Takahashi, Jun Takeuchi, So Nagai, Hiroki Yokoyama, Shinji Taneda, Yoshio Kurihara, Shin Aoki, Hiraku Kameda, Kyu Yong Cho, Akinobu Nakamura, Tatsuya Atsumi, Hideaki Miyoshi. Effects of Switching from Liraglutide or Dulaglutide to Subcutaneous Semaglutide on Glucose Metabolism and Treatment Satisfaction in Patients with Type 2 Diabetes: Protocol for a Multicenter, Prospective, Randomized, Open-Label, Blinded-Endpoint, Parallel-Group Comparison Study (The SWITCH-SEMA 1 Study). Diabetes therapy : research, treatment and education of diabetes and related disorders. 2021 Mar;12(3):955-964

    PMID: 33491111

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