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Beneficial effects of metformin on energy metabolism and visceral fat volume through a possible mechanism of fatty acid oxidation in human subjects and rats.

OBJECTIVEMetformin is known to have a beneficial effect on body weight and body composition, although the precise mechanism has not been elucidated yet. The aim of this study is to investigate the effects of metformin on energy metabolism and anthropometric factors in both human subjects and rats. M... Full description

Journal Title: PloS one 2017, Vol.12(2), p.e0171293
Main Author: Tokubuchi, Ichiro
Other Authors: Tajiri, Yuji , Iwata, Shimpei , Hara, Kento , Wada, Nobuhiko , Hashinaga, Toshihiko , Nakayama, Hitomi , Mifune, Hiroharu , Yamada, Kentaro
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: E-ISSN: 1932-6203 ; DOI: 1932-6203 ; DOI: 10.1371/journal.pone.0171293
Link: http://search.proquest.com/docview/1865557253/?pq-origsite=primo
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title: Beneficial effects of metformin on energy metabolism and visceral fat volume through a possible mechanism of fatty acid oxidation in human subjects and rats.
format: Article
creator:
  • Tokubuchi, Ichiro
  • Tajiri, Yuji
  • Iwata, Shimpei
  • Hara, Kento
  • Wada, Nobuhiko
  • Hashinaga, Toshihiko
  • Nakayama, Hitomi
  • Mifune, Hiroharu
  • Yamada, Kentaro
subjects:
  • Adult–Blood
  • Animals–Metabolism
  • Biomarkers–Drug Effects
  • Case-Control Studies–Metabolism
  • Diabetes Mellitus, Type 2–Anatomy & Histology
  • Energy Metabolism–Drug Effects
  • Fatty Acids–Pharmacology
  • Female–Drug Effects
  • Humans–Drug Effects
  • Intra-Abdominal Fat–Drug Effects
  • Lipid Metabolism–Drug Effects
  • Male–Drug Effects
  • Metformin–Drug Effects
  • Middle Aged–Drug Effects
  • Oxidation-Reduction–Drug Effects
  • Postprandial Period–Drug Effects
  • Rats–Drug Effects
  • Biomarkers
  • Fatty Acids
  • Metformin
ispartof: PloS one, 2017, Vol.12(2), p.e0171293
description: OBJECTIVEMetformin is known to have a beneficial effect on body weight and body composition, although the precise mechanism has not been elucidated yet. The aim of this study is to investigate the effects of metformin on energy metabolism and anthropometric factors in both human subjects and rats. METHODSIn human studies, metformin (1500mg/day) was administered to 23 healthy subjects and 18 patients with type 2 diabetes for 2 weeks. Metabolic parameters and energy metabolism were measured during a meal tolerance test in the morning before and after the treatment of metformin. In animal studies, 13 weeks old SD rats were fed 25-26 g of standard chow only during 12-hours dark phase with either treated by metformin (2.5mg/ml in drinking water) or not for 2 weeks, and metabolic parameters, anthropometric factors and energy metabolism together with expressions related to fat oxidation and adaptive thermogenesis were measured either in fasting or post-prandial state at 15 weeks old. RESULTSPost-prandial plasma lactate concentration was significantly increased after the metformin treatment in both healthy subjects and diabetic patients. Although energy expenditure (EE) did not change, baseline respiratory quotient (RQ) was significantly decreased and post-prandial RQ was significantly increased vice versa following the metformin treatment in both groups. By the administration of metformin to SD rats for 2 weeks, plasma levels of lactate and pyruvate were significantly increased in both fasting and post-prandial states. RQ during a fasting state was significantly decreased in metformin-treated rats compared to controls with no effect on EE. Metformin treatment brought about a significant reduction of visceral fat mass compared to controls accompanied by an up-regulation of fat oxidation-related enzyme in the liver, UCP-1 in the brown adipose tissue and UCP-3 in the skeletal muscle. CONCLUSIONFrom the results obtained, beneficial effects of metformin on visceral fat reduction has been demonstrated probably through a mechanism for a potential shift of fuel resource into fat oxidation and an upregulation of adaptive thermogenesis independent of an anorexigenic effect of this drug.
language: eng
source:
identifier: E-ISSN: 1932-6203 ; DOI: 1932-6203 ; DOI: 10.1371/journal.pone.0171293
fulltext: fulltext
issn:
  • 19326203
  • 1932-6203
url: Link


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titleBeneficial effects of metformin on energy metabolism and visceral fat volume through a possible mechanism of fatty acid oxidation in human subjects and rats.
creatorTokubuchi, Ichiro ; Tajiri, Yuji ; Iwata, Shimpei ; Hara, Kento ; Wada, Nobuhiko ; Hashinaga, Toshihiko ; Nakayama, Hitomi ; Mifune, Hiroharu ; Yamada, Kentaro
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subjectAdult–Blood ; Animals–Metabolism ; Biomarkers–Drug Effects ; Case-Control Studies–Metabolism ; Diabetes Mellitus, Type 2–Anatomy & Histology ; Energy Metabolism–Drug Effects ; Fatty Acids–Pharmacology ; Female–Drug Effects ; Humans–Drug Effects ; Intra-Abdominal Fat–Drug Effects ; Lipid Metabolism–Drug Effects ; Male–Drug Effects ; Metformin–Drug Effects ; Middle Aged–Drug Effects ; Oxidation-Reduction–Drug Effects ; Postprandial Period–Drug Effects ; Rats–Drug Effects ; Biomarkers ; Fatty Acids ; Metformin
descriptionOBJECTIVEMetformin is known to have a beneficial effect on body weight and body composition, although the precise mechanism has not been elucidated yet. The aim of this study is to investigate the effects of metformin on energy metabolism and anthropometric factors in both human subjects and rats. METHODSIn human studies, metformin (1500mg/day) was administered to 23 healthy subjects and 18 patients with type 2 diabetes for 2 weeks. Metabolic parameters and energy metabolism were measured during a meal tolerance test in the morning before and after the treatment of metformin. In animal studies, 13 weeks old SD rats were fed 25-26 g of standard chow only during 12-hours dark phase with either treated by metformin (2.5mg/ml in drinking water) or not for 2 weeks, and metabolic parameters, anthropometric factors and energy metabolism together with expressions related to fat oxidation and adaptive thermogenesis were measured either in fasting or post-prandial state at 15 weeks old. RESULTSPost-prandial plasma lactate concentration was significantly increased after the metformin treatment in both healthy subjects and diabetic patients. Although energy expenditure (EE) did not change, baseline respiratory quotient (RQ) was significantly decreased and post-prandial RQ was significantly increased vice versa following the metformin treatment in both groups. By the administration of metformin to SD rats for 2 weeks, plasma levels of lactate and pyruvate were significantly increased in both fasting and post-prandial states. RQ during a fasting state was significantly decreased in metformin-treated rats compared to controls with no effect on EE. Metformin treatment brought about a significant reduction of visceral fat mass compared to controls accompanied by an up-regulation of fat oxidation-related enzyme in the liver, UCP-1 in the brown adipose tissue and UCP-3 in the skeletal muscle. CONCLUSIONFrom the results obtained, beneficial effects of metformin on visceral fat reduction has been demonstrated probably through a mechanism for a potential shift of fuel resource into fat oxidation and an upregulation of adaptive thermogenesis independent of an anorexigenic effect of this drug.
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titleBeneficial effects of metformin on energy metabolism and visceral fat volume through a possible mechanism of fatty acid oxidation in human subjects and rats.
descriptionOBJECTIVEMetformin is known to have a beneficial effect on body weight and body composition, although the precise mechanism has not been elucidated yet. The aim of this study is to investigate the effects of metformin on energy metabolism and anthropometric factors in both human subjects and rats. METHODSIn human studies, metformin (1500mg/day) was administered to 23 healthy subjects and 18 patients with type 2 diabetes for 2 weeks. Metabolic parameters and energy metabolism were measured during a meal tolerance test in the morning before and after the treatment of metformin. In animal studies, 13 weeks old SD rats were fed 25-26 g of standard chow only during 12-hours dark phase with either treated by metformin (2.5mg/ml in drinking water) or not for 2 weeks, and metabolic parameters, anthropometric factors and energy metabolism together with expressions related to fat oxidation and adaptive thermogenesis were measured either in fasting or post-prandial state at 15 weeks old. RESULTSPost-prandial plasma lactate concentration was significantly increased after the metformin treatment in both healthy subjects and diabetic patients. Although energy expenditure (EE) did not change, baseline respiratory quotient (RQ) was significantly decreased and post-prandial RQ was significantly increased vice versa following the metformin treatment in both groups. By the administration of metformin to SD rats for 2 weeks, plasma levels of lactate and pyruvate were significantly increased in both fasting and post-prandial states. RQ during a fasting state was significantly decreased in metformin-treated rats compared to controls with no effect on EE. Metformin treatment brought about a significant reduction of visceral fat mass compared to controls accompanied by an up-regulation of fat oxidation-related enzyme in the liver, UCP-1 in the brown adipose tissue and UCP-3 in the skeletal muscle. CONCLUSIONFrom the results obtained, beneficial effects of metformin on visceral fat reduction has been demonstrated probably through a mechanism for a potential shift of fuel resource into fat oxidation and an upregulation of adaptive thermogenesis independent of an anorexigenic effect of this drug.
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titleBeneficial effects of metformin on energy metabolism and visceral fat volume through a possible mechanism of fatty acid oxidation in human subjects and rats.
authorTokubuchi, Ichiro ; Tajiri, Yuji ; Iwata, Shimpei ; Hara, Kento ; Wada, Nobuhiko ; Hashinaga, Toshihiko ; Nakayama, Hitomi ; Mifune, Hiroharu ; Yamada, Kentaro
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abstractOBJECTIVEMetformin is known to have a beneficial effect on body weight and body composition, although the precise mechanism has not been elucidated yet. The aim of this study is to investigate the effects of metformin on energy metabolism and anthropometric factors in both human subjects and rats. METHODSIn human studies, metformin (1500mg/day) was administered to 23 healthy subjects and 18 patients with type 2 diabetes for 2 weeks. Metabolic parameters and energy metabolism were measured during a meal tolerance test in the morning before and after the treatment of metformin. In animal studies, 13 weeks old SD rats were fed 25-26 g of standard chow only during 12-hours dark phase with either treated by metformin (2.5mg/ml in drinking water) or not for 2 weeks, and metabolic parameters, anthropometric factors and energy metabolism together with expressions related to fat oxidation and adaptive thermogenesis were measured either in fasting or post-prandial state at 15 weeks old. RESULTSPost-prandial plasma lactate concentration was significantly increased after the metformin treatment in both healthy subjects and diabetic patients. Although energy expenditure (EE) did not change, baseline respiratory quotient (RQ) was significantly decreased and post-prandial RQ was significantly increased vice versa following the metformin treatment in both groups. By the administration of metformin to SD rats for 2 weeks, plasma levels of lactate and pyruvate were significantly increased in both fasting and post-prandial states. RQ during a fasting state was significantly decreased in metformin-treated rats compared to controls with no effect on EE. Metformin treatment brought about a significant reduction of visceral fat mass compared to controls accompanied by an up-regulation of fat oxidation-related enzyme in the liver, UCP-1 in the brown adipose tissue and UCP-3 in the skeletal muscle. CONCLUSIONFrom the results obtained, beneficial effects of metformin on visceral fat reduction has been demonstrated probably through a mechanism for a potential shift of fuel resource into fat oxidation and an upregulation of adaptive thermogenesis independent of an anorexigenic effect of this drug.
doi10.1371/journal.pone.0171293
urlhttp://search.proquest.com/docview/1865557253/
date2017-01-01