Laurie R Braun1,2, Meghan N Feldpausch1, Natalia Czerwonka1, Julian Weiss1, Karen Branch3, Hang Lee4, Edgar L Martinez-Salazar5, Martin Torriani5, Craig A Sponseller6, Steven K Grinspoon1, Takara L Stanley1,2. 1. Program in Nutritional Metabolism and Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts. 2. Department of Pediatrics, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts. 3. Clinical Research Center, Massachusetts General Hospital, Boston, Massachusetts. 4. Biostatistics Center, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts. 5. Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts. 6. Kowa Pharmaceuticals America, Montgomery, Alabama.
Abstract
Context:3-Hydroxy-3-methyl-glutaryl-coenzyme A reductase inhibitors (statins) are widely prescribed. Statins may have important metabolic effects on insulin sensitivity and liver fat, but limited studies have assessed these effects by using euglycemic hyperinsulinemic clamp, stable isotopes, and 1H magnetic resonance spectroscopy (MRS) for liver fat quantification. Objective: To study the effects of pitavastatin on hepatic fat and insulin sensitivity. Design: Six-month, double-blind, randomized, placebo-controlled trial. Setting: Academic clinical research center in Boston, Massachusetts. Participants: Overweight, insulin-resistant men aged 40 to 65 years who had not received statin therapy for ≥1 year. Interventions: Pitavastatin 4 mg or placebo daily. Outcome: The primary endpoints were changes in insulin sensitivity measured by euglycemic hyperinsulinemic clamp and liver fat measured by 1H MRS. Results:Pitavastatin showed no effect on endogenous glucose production (ΔRa glucose 0.07 ± 0.07 vs 0.04 ± 0.07 mg/kg/min, pitavastatin vs placebo, P = 0.76) or insulin-stimulated glucose uptake during "low dose" (ΔM 0.1 ± 0.1 vs -0.3 ± 0.2 mg/kg/min, P = 0.11) and "high dose" (ΔM -0.5 ± 0.3 vs -0.7 ± 0.4 mg/kg/min, P = 0.70) euglycemic hyperinsulinemic clamps. There was also no effect of pitavastatin on fasting glucose, HbA1c, and 2-hour glucose after 75-g glucose challenge. There was also no change in liver fat fraction (-1 ± 1 vs -0 ± 1%, P = 0.56). Conclusion: Compared with placebo, pitavastatin did not affect hepatic or whole-body insulin sensitivity, and it did not reduce liver fat.
RCT Entities:
Context: 3-Hydroxy-3-methyl-glutaryl-coenzyme A reductase inhibitors (statins) are widely prescribed. Statins may have important metabolic effects on insulin sensitivity and liver fat, but limited studies have assessed these effects by using euglycemic hyperinsulinemic clamp, stable isotopes, and 1H magnetic resonance spectroscopy (MRS) for liver fat quantification. Objective: To study the effects of pitavastatin on hepatic fat and insulin sensitivity. Design: Six-month, double-blind, randomized, placebo-controlled trial. Setting: Academic clinical research center in Boston, Massachusetts. Participants: Overweight, insulin-resistant men aged 40 to 65 years who had not received statin therapy for ≥1 year. Interventions: Pitavastatin 4 mg or placebo daily. Outcome: The primary endpoints were changes in insulin sensitivity measured by euglycemic hyperinsulinemic clamp and liver fat measured by 1HMRS. Results:Pitavastatin showed no effect on endogenous glucose production (ΔRa glucose 0.07 ± 0.07 vs 0.04 ± 0.07 mg/kg/min, pitavastatin vs placebo, P = 0.76) or insulin-stimulated glucose uptake during "low dose" (ΔM 0.1 ± 0.1 vs -0.3 ± 0.2 mg/kg/min, P = 0.11) and "high dose" (ΔM -0.5 ± 0.3 vs -0.7 ± 0.4 mg/kg/min, P = 0.70) euglycemic hyperinsulinemic clamps. There was also no effect of pitavastatin on fasting glucose, HbA1c, and 2-hour glucose after 75-g glucose challenge. There was also no change in liver fat fraction (-1 ± 1 vs -0 ± 1%, P = 0.56). Conclusion: Compared with placebo, pitavastatin did not affect hepatic or whole-body insulin sensitivity, and it did not reduce liver fat.
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