1. The SGLT2 Inhibitor Dapagliflozin Reduces Liver Fat but Does Not Affect Tissue Insulin Sensitivity: A Randomized, Double-Blind, Placebo-Controlled Study With 8-Week Treatment in Type 2 Diabetes Patients
- Author
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Nina Mononen, Lars Johansson, Jarna C. Hannukainen, Jan Oscarsson, Anna K. Kirjavainen, Pirjo Nuutila, Virva Saunavaara, Miikka-Juhani Honka, Juha Saltevo, Joel Kullberg, Aino Latva-Rasku, Patricia Iozzo, and Terho Lehtimäki
- Subjects
Adult ,Blood Glucose ,Male ,medicine.medical_specialty ,Endocrinology, Diabetes and Metabolism ,Urology ,Adipose tissue ,030209 endocrinology & metabolism ,Type 2 diabetes ,Dipeptidyl peptidase-4 inhibitor ,Placebos ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Double-Blind Method ,Glucosides ,Diabetes mellitus ,Brown adipose tissue ,Internal Medicine ,Humans ,Hypoglycemic Agents ,Insulin ,Medicine ,030212 general & internal medicine ,Benzhydryl Compounds ,Dapagliflozin ,Sodium-Glucose Transporter 2 Inhibitors ,Aged ,Glycemic ,Advanced and Specialized Nursing ,business.industry ,Middle Aged ,Lipid Metabolism ,medicine.disease ,Metformin ,Fatty Liver ,medicine.anatomical_structure ,Diabetes Mellitus, Type 2 ,Liver ,chemistry ,Female ,Insulin Resistance ,business ,medicine.drug - Abstract
OBJECTIVE The aim of this study was to investigate tissue-specific effects of dapagliflozin on insulin sensitivity and liver and body fat in patients with type 2 diabetes. RESEARCH DESIGN AND METHODS This randomized, double-blind, parallel group, placebo-controlled study recruited 32 patients with type 2 diabetes. Enrolled patients were to have HbA1c 6.5–10.5% (48–91 mmol/mol) and ≥3 months of stable treatment with metformin, dipeptidyl peptidase 4 inhibitor, or their combination. Patients were randomized 1:1 to receive 10 mg dapagliflozin or placebo daily for 8 weeks. Before and after the intervention, tissue insulin sensitivity was measured using [18F]-fluorodeoxyglucose and positron emission tomography during hyperinsulinemic-euglycemic clamp. Liver proton density fat fraction (PDFF) and adipose tissue volumes were assessed using MRI, and blood biomarkers were analyzed. RESULTS After 8 weeks, glycemic control was improved by dapagliflozin (placebo-corrected change in HbA1c −0.39%, P < 0.01), but whole-body glucose uptake was not increased (P = 0.90). Tissue-specific insulin-stimulated glucose uptake did not change in skeletal muscle, liver, myocardium, or white and brown adipose tissue, and endogenous glucose production remained unaffected. However, there were significant placebo-corrected decreases in liver PDFF (−3.74%, P < 0.01), liver volume (−0.10 L, P < 0.05), visceral adipose tissue volume (−0.35 L, P < 0.01), interleukin-6 (−1.87 pg/mL, P < 0.05), and N-terminal prohormone of brain natriuretic peptide (−96 ng/L, P = 0.03). CONCLUSIONS In this study, 8 weeks of treatment with dapagliflozin reduced liver PDFF and the volume of visceral adipose tissue in obese patients with type 2 diabetes. Although glycemic control was improved, no effect on tissue-level insulin sensitivity was observed.
- Published
- 2019
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