Liraglutide Reduces Visceral and Intrahepatic Fat Without Significant Loss of Muscle Mass in Obese Patients With Type 2 Diabetes: A Prospective Case Series

Satoshi Ishii, Yoshio Nagai, Yukiyoshi Sada, Hisashi Fukuda, Yuta Nakamura, Ren Matsuba, Tomoko Nakagawa, Hiroyuki Kato, Yasushi Tanaka

Abstract


Background: Glucagon-like peptide-1 receptor agonists have been reported to reduce body fat as well as improving glycemic control in obese patients with type 2 diabetes. However, the maximum dose of liraglutide is limited to 0.9 mg in Japan, while the international dose is 1.8 mg; and the effect of this low dose on body composition has not been assessed in detail. Accordingly, this study was performed to evaluate the effect of liraglutide on body composition when administered at 0.9 mg once daily for 24 weeks.

Methods: Nine patients were enrolled and started liraglutide at 0.3 mg once daily, which was titrated to 0.9 mg once daily after 1 - 2 weeks and continued for 24 weeks. To comprehensively investigate changes of body composition, the body fat and muscle weight were determined by dual energy absorptiometry, visceral fat volume (VFV) and abdominal subcutaneous fat volume (SFV) were measured by abdominal computed tomography (CT), and the intrahepatic lipid content (IHL) was assessed by proton magnetic resonance spectroscopy. Measurements were obtained before starting liraglutide therapy and after 12 and 24 weeks of treatment.

Results: Fasting plasma glucose was significantly reduced from 127 ± 22 to 101 ± 14 mg/dL at 24 weeks and hemoglobin A1c (HbA1c) showed significant reduction from 6.4±0.9% to 5.2±0.5%. Body weight was reduced from 103.4 ± 14.7 to 97.0 ± 12.4 kg (mean reduction: 11.7%) and BMI decreased from 37.4 ± 6.4 to 35.0 ± 5.3 kg/m2 (mean reduction: 5.8%). Furthermore, VFV and IHL decreased from 5,192 ± 1,730 to 4,513 ± 1,299 cm3 (mean reduction: 11.9%) and 32.1±12.6% to 15.2±9.2% (mean reduction: 49.2%), respectively, but SFV did not change. Moreover, the fat index was reduced from 14.8 ± 4.4 to 12.9 ± 3.4 kg/m2 (mean reduction: 10.9%), but the skeletal muscle index did not change.

Conclusions: In obese Japanese drug-naive patients who had type 2 diabetes, treatment with liraglutide (0.9 mg once daily for 24 weeks) reduced body fat, especially visceral fat and intrahepatic fat, while having no significant effect on skeletal muscle.




J Clin Med Res. 2019;11(3):219-224
doi: https://doi.org/10.14740/jocmr3647


Keywords


Liraglutide; Visceral fat volume; Subcutaneous fat volume; Intrahepatic lipid content; Skeletal muscle index

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