Dapagliflozin Reduces Fat Mass without Affecting Muscle Mass in Type 2 Diabetes

Seigo Sugiyama, Hideaki Jinnouchi, Noboru Kurinami, Kunio Hieshima, Akira Yoshida, Katsunori Jinnouchi, Hiroyuki Nishimura, Tomoko Suzuki, Fumio Miyamoto, Keizo Kajiwara, Tomio Jinnouchi, Seigo Sugiyama, Hideaki Jinnouchi, Noboru Kurinami, Kunio Hieshima, Akira Yoshida, Katsunori Jinnouchi, Hiroyuki Nishimura, Tomoko Suzuki, Fumio Miyamoto, Keizo Kajiwara, Tomio Jinnouchi

Abstract

Aim: Sodium-glucose co-transporter 2 inhibitor (SGLT2i) therapy has been demonstrated to improve glycemic control and reduce body weight and fat mass in type 2 diabetes mellitus (T2DM). Here, our aim was to investigate the effects of SGLT2i dapagliflozin-treatment on body muscle mass and muscle fat content in patients with T2DM.

Methods: We prospectively recruited uncontrolled (hemoglobin A1c [HbA1c] >7%) Japanese T2DM patients who had a body mass index (BMI) <35 kg/m2. Patients were treated with dapagliflozin (5 mg/day) or non-SGLT2i medicines for six months to improve HbA1c. We investigated changes in body composition using bioelectrical impedance analysis and changes in psoas muscle mass using abdominal computed tomography (CT).

Results: Subjects were 50 T2DM patients (72% male) with a mean age of 56.1 years, mean BMI of 27.1 kg/m2 and mean HbA1c of 7.9%. HbA1c, body weight, and BMI were significantly decreased in both treatment groups, and the HbA1c decrease was not significantly different between groups. Dapagliflozin treatment significantly decreased body weight and total fat mass without affecting skeletal muscle mass. The absolute change in soft lean mass and skeletal muscle mass was not significantly different between groups. Dapagliflozin treatment did not significantly decrease psoas muscle index, and the absolute change in this index was not significantly different between groups. Dapagliflozin therapy also produced a significant increase in CT radiation attenuation in the third lumbar paraspinal muscles compared with non-SGLT2i therapy.

Conclusions: Treatment with dapagliflozin for six months significantly improved glycemic control and reduced body weight without reducing muscle mass in T2DM patients.

Keywords: Fat mass; Muscle mass; Sarcopenia; Sodium-glucose co-transporter 2 inhibitor; Type 2 diabetes.

Conflict of interest statement

Dr. Seigo Sugiyama has received Speaker's Bureau from MSD, Inc., AstraZeneca Pharmaceuticals LP, Ono Pharmaceutical Co., Ltd., Eli Lilly Japan K.K., Novo Nordisk Inc., Daiichi-Sankyo Co., Ltd., and Boehringer Ingelheim Pharmaceuticals, Inc.

Dr. Hideaki Jinnouchi has received Consultant from Sanofi U.S., and Novo Nordisk Inc.; Research support from Eli Lilly Japan K.K., Novo Nordisk Inc., Boehringer Ingelheim Pharmaceuticals, Inc., Sumitomo Dainippon Pharma Co., Ltd., GlaxoSmithKline, Takeda Pharmaceutical Company Limited, Daiichi- Sankyo Co., Ltd., Taisho Pharmaceutical Co., Ltd., Astellas Pharma US, Inc., and AstraZeneca Pharmaceuticals LP; Speaker's Bureau from Sanofi U.S., Eli Lilly Japan K.K., Takeda Pharmaceutical Company Limited, Astellas Pharma US, Inc., Mitsubishi Tanabe Pharma Corporation, Daiichi-Sankyo Co., Ltd., Boehringer Ingelheim Pharmaceuticals, Inc., Kissei Pharmaceutical Co., Ltd., Kowa Pharmaceuticals, Novartis Pharmaceuticals Corporation, AstraZeneca Pharmaceuticals LP, MSD, Inc., and Mochida Pharmaceutical Co., Ltd.

All other authors declare that they have no conflict of interest.

Figures

Fig. 1.
Fig. 1.
Dot plot of soft lean mass before and after 6 months of dapagliflozin or non-sodium-glucose co-transporter 2 inhibitor (SGLT2i) therapy as measured using a bioelectrical impedance analyzer Soft lean mass of each patient before and after each therapy presented as a dot plot, with black circles and bars representing the mean and standard error of the mean, respectively.
Fig. 2.
Fig. 2.
Dot plot of skeletal muscle mass before and after 6 months of dapagliflozin or non-sodium-glucose co-transporter 2 inhibitor (SGLT2i) therapy as measured using a bioelectrical impedance analyzer Skeletal muscle mass of each patient before and after each therapy presented as a dot plot, with black circles and bars representing the mean and standard error of the mean, respectively.
Fig. 3.
Fig. 3.
Dot plot of the psoas muscle index before and after 6 months of dapagliflozin or non-sodium-glucose co-transporter 2 inhibitor (SGLT2i) therapy as assessed by abdominal computed tomography Psoas muscle index of each patient before and after each therapy presented as a dot plot, with black circles and bars representing the mean and standard error of the mean, respectively.

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Source: PubMed

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