Farshad Amirkhizi; Soudabeh Hamedi-Shahraki; Sonya Hosseinpour-Arjmand; Elnaz Vaghef-Mehrabany; Mehrangiz Ebrahimi-Mameghani
Volume 20, Issue 9 , 2018, Pages 1-11
Abstract
Background: Several mechanisms have been suggested to explain the pathogenesis of nonalcoholic fatty liver disease (NAFLD) and its progression, one of which is increased oxidative stress. Objectives: This study aimed to evaluate the effect of alpha-lipoic acid (ALA) supplementation on anthropometric ...
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Background: Several mechanisms have been suggested to explain the pathogenesis of nonalcoholic fatty liver disease (NAFLD) and its progression, one of which is increased oxidative stress. Objectives: This study aimed to evaluate the effect of alpha-lipoic acid (ALA) supplementation on anthropometric indices, dietary intake and oxidative stress-related parameters in obese patients with NAFLD. Methods: In this double-blind, placebo-controlled trial, 50 NAFLD patients were assigned to two groups of receiving 1200 mg ALA (two 600 mg capsules of ALA) and placebo (two 600 mg capsules of placebo) for 12 weeks. Serum liver enzymes, malondialdehyde (MDA) level, total antioxidant status (TAS), and the activities of copper-zinc superoxide dismutase (Cu/Zn-SOD) and glutathione per- oxidase (GSH-Px) were assessed at baseline and after 12 weeks of intervention. Results: Serum concentrations of liver enzymes decreased significantly in the ALA group (P < 0.05 for all), while a noticeable decline was observed for alanine aminotransferase (ALT) in the placebo group (32.5 ± 18.9 vs. 25.9 ± 11.2; P = 0.034). Nonetheless, there were no significant differences between the study groups concerning serum liver enzymes concentrations post-intervention. AlthoughALA supplementation significantly reduced the serum concentration of MDA (2.52 ± 0.35 vs. 2.77 ± 0.49; P < 0.040) and increased serum TAS (1.73 ± 0.55 vs. 1.52 ± 0.34; P < 0.048), other oxidative stress-related parameters such as Cu/Zn-SOD and GSH-Px activities were not affected. Conclusions: These findings suggest that daily supplementation of 1200 mg alpha-lipoic acid (ALA) for 12 weeks improves oxidative stress markers in patients with nonalcoholic fatty liver disease (NAFLD) and it could be considered as adjunctive therapy for the prevention of NAFLD progression.
Sonya Hosseinpour-Arjmand; Soudabeh Hamedi-Shahraki; Mehrangiz Ebrahimi-Mameghani; Farshad Amirkhizi
Volume 20, Issue 3 , 2018, Pages 1-11
Abstract
Background: Insulin resistance has a pivotal role in the occurrence of impaired glucose tolerance and dyslipidemia in patients with Non-Alcoholic Fatty Liver Disease (NAFLD). There is evidence of possible beneficial effects of Alpha-Lipoic Acid (ALA) on insulin resistance and metabolic disorders. Objectives: ...
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Background: Insulin resistance has a pivotal role in the occurrence of impaired glucose tolerance and dyslipidemia in patients with Non-Alcoholic Fatty Liver Disease (NAFLD). There is evidence of possible beneficial effects of Alpha-Lipoic Acid (ALA) on insulin resistance and metabolic disorders. Objectives: This study aimed at examining the effects of ALA supplementation on liver enzymes, insulin sensitivity, glucose markers, and lipid profile in obese patients with NAFLD.Methods: In this double-blind placebo-controlled randomized clinical trial, 50 obese patients with NAFLD were randomly allocated to “ALA group” (received 1200 mg ALA as two capsules per day) or “Placebo group” (received placebo containing cornstarch as two capsules per day) for 12 weeks. Anthropometric measures, dietary intakes, liver enzymes as well as glucose markers and lipid profile were assessed at baseline and after 12 weeks of intervention.Results: Forty-five patients completed the study (ALA group = 23; placebo group = 22). Liver enzymes were not significantly altered by the intervention group. Alpha Lipoic Acid supplementation led to a significant attenuation in serum levels of insulin (13.4 ± 5.4 vs. 18.1 ± 8.6; P = 0.019) and triglyceride (146.9 ± 60.6 vs. 186.3 ± 54.2; P = 0.037) in comparison with the placebo group, yet did not affect other lipid profile parameters, Fasting Serum Glucose (FSG) and β-cell function index (HOMA-B) in patients with NAFLD. furthermore, quantitative insulin sensitivity check index (QUICKI) increased significantly in the ALA group compared to the placebo (0.329 ± 0.025 versus 0.317 ± 0.020; P = 0.033).Conclusions: Patients with NAFLD may benefit from ALA supplementation, at least partially through augmented insulin sensitivity and improvement of lipid profile
