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Kawai S, Yamakage H, Kotani K, Noda M, Satoh-Asahara N, Hashimoto K. Differences in metabolic characteristics between Metabolically Healthy Obesity (MHO) and Metabolically Unhealthy Obesity (MUO) in weight reduction therapy. Endocr J 2023; 70:1175-1186. [PMID: 37793817 DOI: 10.1507/endocrj.ej23-0189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/06/2023] Open
Abstract
Metabolically Healthy Obesity (MHO) is generally recognized as the absence of any metabolic disorders and cardiovascular diseases, including type 2 diabetes, dyslipidemia, and hypertension, in obese individuals; however, it is not clearly defined. Therefore, the present study investigated differences in metabolic characteristics between individuals with MHO and Metabolically Unhealthy Obesity (MUO) during weight reduction therapy. The key factors defining MHO and the importance of weight reduction therapy for MHO were also examined. Cohort data from the Japan Obesity and Metabolic Syndrome (JOMS) study were analyzed. Subjects were divided into the MHO (n = 25) and MUO (n = 120) groups. Prior to weight reduction therapy, serum adiponectin levels were significantly higher in the MHO group than in the MUO group. Serum adiponectin levels also negatively correlated with the area of subcutaneous adipose tissue (SAT) and Homeostasis model assessment (HOMA)-R in the MHO group, but not in the MUO group. Collectively, the present results suggest the importance of adiponectin for maintaining metabolic homeostasis in the MHO group. On the other hand, no significant differences were observed in inflammatory markers between the MHO and MUO groups, suggesting the presence of chronic inflammation in both groups. Furthermore, a positive correlation was noted between changes in serum cystatin C levels and waist circumference in the MHO group, which indicated that despite the absence of metabolic disorders, the MHO group exhibited anti-inflammatory responses during weight reduction therapy. These results underscore the significance of weight reduction even for individuals with MHO.
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Affiliation(s)
- Shiori Kawai
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Saitama 343-8555, Japan
- Department of Diabetes Mellitus, Saitama Cooperative Hospital, Saitama 333-0831, Japan
| | - Hajime Yamakage
- Division of Diabetic Research, Clinical Research Institute, National Hospital Organization Kyoto Medical Center, Kyoto 612-8555, Japan
| | - Kazuhiko Kotani
- Division of Community and Family Medicine, Jichi Medical University, Tochigi 329-0498, Japan
| | - Mitsuhiko Noda
- Department of Diabetes, Metabolism and Endocrinology, Ichikawa Hospital, International University of Health and Welfare, Chiba 272-0827, Japan
- Department of Endocrinology and Diabetes, Saitama Medical University, Saitama 350-0495, Japan
| | - Noriko Satoh-Asahara
- Division of Diabetic Research, Clinical Research Institute, National Hospital Organization Kyoto Medical Center, Kyoto 612-8555, Japan
- Department of Metabolic Syndrome and Nutritional Science, Research Institute of Environmental Medicine, Nagoya University, Aichi 464-8601, Japan
| | - Koshi Hashimoto
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Saitama 343-8555, Japan
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Zeinabi A, Ghaedi H, Hosseini SA. Soluble Fiber Effect on Human Serum Leptin and Adiponectin: A Systematic Review and Dose-Response Meta-Analysis. Clin Nutr Res 2023; 12:320-335. [PMID: 37969941 PMCID: PMC10641331 DOI: 10.7762/cnr.2023.12.4.320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 08/16/2023] [Accepted: 10/16/2023] [Indexed: 11/17/2023] Open
Abstract
Literature showed that soluble fiber has beneficial effects on cardiometabolic risk factors and leptin and adiponectin serum levels. Our aim in this meta-analysis was to determine the effect of soluble fiber supplementation on leptin and adiponectin serum levels. A systematic search was conducted using PubMed, Scopus, and ISI Web of Science for eligible trials up to December 2021. A random-effects model was used to pool calculated effect sizes. Our analysis showed that soluble fiber supplementation did not significantly affect adiponectin (standardized mean difference [SMD], -0.49 Hedges's, 95% confidence interval [CI], -1.20, 0.21, p value = 0.167; I2 = 95.4, p value < 0.001) and leptin (SMD, -0.8 Hedges's, 95% CI, -1.70, 0.08, p value = 0.076; I2 = 94.6, p value < 0.001) concentrations in comparison with placebo. However, in the subgroup, soluble fiber supplementation had a significant improvement in leptin concentration in overweight and obese patients (SMD, -0.22 Hedges's, 95% CI, -0.43, -0.01, p value = 0.048) and a non-significant beneficial effect in adiponectin level in female (SMD, 0.29 Hedges's, 95% CI, -0.13, 0.71, p value = 0.183) and diabetic patients (SMD, 0.32 Hedges's, 95% CI, -0.67, 1.32, p value = 0.526). A non-linear association between soluble fiber dosage and adiponectin (pnon-linearity < 0.001) was observed. Soluble fiber supplementation could not change the circulatory leptin and adiponectin levels. However, beneficial effects were seen in overweight and obese leptin, and increases in adiponectin may also be observed in female and diabetic patients. Further studies are needed to confirm this results.
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Affiliation(s)
- Ali Zeinabi
- Department of Sport Physiology, Lamerd Branch, Islamic Azad University, Lamerd 14696-69191, Iran
| | - Hadi Ghaedi
- Department of Sport Physiology, Lamerd Branch, Islamic Azad University, Lamerd 14696-69191, Iran
| | - Seyed Ali Hosseini
- Department of Sport Physiology, Marvdasht Branch, Islamic Azad University, Marvdasht 73711-13119, Iran
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Han W, Yang S, Xiao H, Wang M, Ye J, Cao L, Sun G. Role of Adiponectin in Cardiovascular Diseases Related to Glucose and Lipid Metabolism Disorders. Int J Mol Sci 2022; 23:15627. [PMID: 36555264 PMCID: PMC9779180 DOI: 10.3390/ijms232415627] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 12/06/2022] [Accepted: 12/07/2022] [Indexed: 12/13/2022] Open
Abstract
Lifestyle changes have led to increased incidence of cardiovascular disease (CVD); therefore, potential targets against CVD should be explored to mitigate its risks. Adiponectin (APN), an adipokine secreted by adipose tissue, has numerous beneficial effects against CVD related to glucose and lipid metabolism disorders, including regulation of glucose and lipid metabolism, increasing insulin sensitivity, reduction of oxidative stress and inflammation, protection of myocardial cells, and improvement in endothelial cell function. These effects demonstrate the anti-atherosclerotic and antihypertensive properties of APN, which could aid in improving myocardial hypertrophy, and reducing myocardial ischemia/reperfusion (MI/R) injury and myocardial infarction. APN can also be used for diagnosing and predicting heart failure. This review summarizes and discusses the role of APN in the treatment of CVD related to glucose and lipid metabolism disorders, and explores future APN research directions and clinical application prospects. Future studies should elucidate the signaling pathway network of APN cardiovascular protective effects, which will facilitate clinical trials targeting APN for CVD treatment in a clinical setting.
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Affiliation(s)
- Wen Han
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- Key Laboratory of Efficacy Evaluation of Chinese Medicine against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- National Medical Products Administration Key Laboratory for Research and Evaluation of Pharmacovigilance, Beijing 100193, China
- Key Laboratory of New Drug Discovery Based on Classic Chinese Medicine Prescription, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
| | - Shuxian Yang
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- Key Laboratory of Efficacy Evaluation of Chinese Medicine against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- National Medical Products Administration Key Laboratory for Research and Evaluation of Pharmacovigilance, Beijing 100193, China
- Key Laboratory of New Drug Discovery Based on Classic Chinese Medicine Prescription, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
| | - Haiyan Xiao
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- Key Laboratory of Efficacy Evaluation of Chinese Medicine against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- National Medical Products Administration Key Laboratory for Research and Evaluation of Pharmacovigilance, Beijing 100193, China
- Key Laboratory of New Drug Discovery Based on Classic Chinese Medicine Prescription, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
| | - Min Wang
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- Key Laboratory of Efficacy Evaluation of Chinese Medicine against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- National Medical Products Administration Key Laboratory for Research and Evaluation of Pharmacovigilance, Beijing 100193, China
- Key Laboratory of New Drug Discovery Based on Classic Chinese Medicine Prescription, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
| | - Jingxue Ye
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- Key Laboratory of Efficacy Evaluation of Chinese Medicine against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- National Medical Products Administration Key Laboratory for Research and Evaluation of Pharmacovigilance, Beijing 100193, China
- Key Laboratory of New Drug Discovery Based on Classic Chinese Medicine Prescription, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
| | - Li Cao
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- Key Laboratory of Efficacy Evaluation of Chinese Medicine against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- National Medical Products Administration Key Laboratory for Research and Evaluation of Pharmacovigilance, Beijing 100193, China
- Key Laboratory of New Drug Discovery Based on Classic Chinese Medicine Prescription, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
| | - Guibo Sun
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- Key Laboratory of Efficacy Evaluation of Chinese Medicine against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
- National Medical Products Administration Key Laboratory for Research and Evaluation of Pharmacovigilance, Beijing 100193, China
- Key Laboratory of New Drug Discovery Based on Classic Chinese Medicine Prescription, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
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Congenital adiponectin deficiency mitigates high-fat-diet-induced obesity in gonadally intact male and female, but not in ovariectomized mice. Sci Rep 2022; 12:16668. [PMID: 36198723 PMCID: PMC9534911 DOI: 10.1038/s41598-022-21228-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 09/23/2022] [Indexed: 11/24/2022] Open
Abstract
Epidemiological literature indicates that women are less susceptible to type II diabetes (T2D) than males. The general consensus is that estrogen is protective, whereas its deficiency in post-menopause is associated with adiposity and impaired insulin sensitivity. However, epidemiological data suggests that males are more prone to developing T2D, and at a lower BMI, compared to females during post-menopausal years; suggesting that another factor, other than estrogen, protects females. We proposed to determine if adiponectin (APN) serves as this protective factor. An initial experiment was performed in which gonadally intact male and female mice were fed either a purified low-fat diet (LFD) or high-fat diet (HFD) (40% kcals from fat) for 16 weeks. An additional group of HFD ovariectomy (OVX) mice were included to assess estrogen deficiency’s impact on obesity. Body composition, adipose tissue inflammation, ectopic lipid accumulation as well as glucose metabolism and insulin resistance were assessed. In corroboration with previous data, estrogen deficiency (OVX) exacerbated HFD-induced obesity in female mice. However, despite a higher body fat percentage and a similar degree of hepatic and skeletal muscle lipid accumulation, female OVX HFD-fed mice exhibited enhanced insulin sensitivity relative to HFD-fed males. Therefore, a subsequent HFD experiment was performed utilizing male and female (both gonadally intact and OVX) APN deficient mice (APN−/−) and wildtype littermates to determine if APN is the factor which protects OVX females from the similar degree of metabolic dysfunction as males in the setting of obesity. Indirect calorimetry was used to determine observed phenotype differences. APN deficiency limited adiposity and mitigated HFD-induced insulin resistance and adipose tissue inflammation in gonadally intact male and female, but not in OVX mice. Using indirect calorimetry, we uncovered that slight, but non-statistically significant differences in food intake and energy expenditure leading to a net difference in energy balance likely explain the reduced body weight exhibited by male APN-deficient mice. In conclusion, congenital APN deficiency is protective against obesity development in gonadally intact mice, however, in the setting of estrogen deficiency (OVX) this is not true. These findings suggest that gonadal status dictates the protective effects of congenital APN deficiency in the setting of HFD-induced obesity.
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de la Fuente-Fernández M, de la Fuente-Muñoz M, Román-Carmena M, Amor S, García-Redondo AB, Blanco-Rivero J, González-Hedström D, Espinel AE, García-Villalón ÁL, Granado M. Carob Extract Supplementation Together with Caloric Restriction and Aerobic Training Accelerates the Recovery of Cardiometabolic Health in Mice with Metabolic Syndrome. Antioxidants (Basel) 2022; 11:antiox11091803. [PMID: 36139877 PMCID: PMC9495762 DOI: 10.3390/antiox11091803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 09/08/2022] [Accepted: 09/09/2022] [Indexed: 11/16/2022] Open
Abstract
Carob, the fruit of Ceratonia siliqua L. exerts antidiabetic, anti-inflammatory, and antioxidant effects and could be a useful strategy for the treatment and/or prevention of metabolic syndrome (MetS). The aim of this study was to analyze whether supplementation with a carob fruit extract (CSAT+®), alone or in combination with aerobic training, accelerates the recovery of cardiometabolic health in mice with MetS subjected to a caloric restriction. For this purpose, mice were fed with a high fat (58% kcal from fat)/high sugar diet for 23 weeks to induce MetS. During the next two weeks, mice with MetS were switched to a diet with a lower caloric content (25% kcal from fat) supplemented or not with CSAT+® (4.8%) and/or subjected to aerobic training. Both caloric reduction and aerobic training improved the lipid profile and attenuated MetS-induced insulin resistance measured as HOMA-IR. However, only supplementation with CSAT+® enhanced body weight loss, increased the circulating levels of adiponectin, and lowered the plasma levels of IL-6. Moreover, CSAT+® supplementation was the only effective strategy to reduce the weight of epidydimal adipose tissue and to improve insulin sensitivity in the liver and in skeletal muscle. Although all interventions improved endothelial function in aorta segments, only supplementation with CSAT+® reduced obesity-induced hypertension, prevented endothelial dysfunction in mesenteric arteries, and decreased the vascular response of aorta segments to the vasoconstrictor AngII. The beneficial cardiometabolic effects of CSAT+® supplementation, alone or in combination with aerobic training, were associated with decreased mRNA levels of pro-inflammatory markers such as MCP-1, TNFα, IL-1β, and IL-6 and with increased gene expression of antioxidant enzymes, such as GSR, GPX-3, and SOD-1 in the liver, gastrocnemius, retroperitoneal adipose tissue, and aorta. In conclusion, supplementation with CSAT+®, alone or in combination with aerobic training, to mice with MetS subjected to caloric restriction for two weeks enhances body weight loss, improves the lipid profile and insulin sensitivity, and exerts antihypertensive effects through its anti-inflammatory and antioxidant properties.
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Affiliation(s)
| | - Mario de la Fuente-Muñoz
- Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain
| | - Marta Román-Carmena
- Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain
| | - Sara Amor
- Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain
| | - Ana Belén García-Redondo
- Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain
- Instituto de Investigación Sanitaria La Paz (IdiPaz), 28029 Madrid, Spain
- CIBER Enfermedades Cardiovasculares, Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Javier Blanco-Rivero
- Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain
- Instituto de Investigación Sanitaria La Paz (IdiPaz), 28029 Madrid, Spain
- CIBER Enfermedades Cardiovasculares, Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Daniel González-Hedström
- R&D Department, Pharmactive Biotech Products S.L.U., Parque Científico de Madrid, Calle Faraday 7, 28049 Madrid, Spain
| | - Alberto E. Espinel
- R&D Department, Pharmactive Biotech Products S.L.U., Parque Científico de Madrid, Calle Faraday 7, 28049 Madrid, Spain
| | | | - Miriam Granado
- Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición. Instituto de Salud Carlos III, 28029 Madrid, Spain
- Correspondence:
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Bernacchioni C, Squecco R, Gamberi T, Ghini V, Schumacher F, Mannelli M, Garella R, Idrizaj E, Cencetti F, Puliti E, Bruni P, Turano P, Fiaschi T, Donati C. S1P Signalling Axis Is Necessary for Adiponectin-Directed Regulation of Electrophysiological Properties and Oxidative Metabolism in C2C12 Myotubes. Cells 2022; 11:cells11040713. [PMID: 35203362 PMCID: PMC8869893 DOI: 10.3390/cells11040713] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 02/12/2022] [Accepted: 02/14/2022] [Indexed: 02/04/2023] Open
Abstract
Background: Adiponectin (Adn), released by adipocytes and other cell types such as skeletal muscle, has insulin-sensitizing and anti-inflammatory properties. Sphingosine 1-phosphate (S1P) is reported to act as effector of diverse biological actions of Adn in different tissues. S1P is a bioactive sphingolipid synthesized by the phosphorylation of sphingosine catalyzed by sphingosine kinase (SK) 1 and 2. Consolidated findings support the key role of S1P in the biology of skeletal muscle. Methods and Results: Here we provide experimental evidence that S1P signalling is modulated by globular Adn treatment being able to increase the phosphorylation of SK1/2 as well as the mRNA expression levels of S1P4 in C2C12 myotubes. These findings were confirmed by LC-MS/MS that showed an increase of S1P levels after Adn treatment. Notably, the involvement of S1P axis in Adn action was highlighted since, when SK1 and 2 were inhibited by PF543 and ABC294640 inhibitors, respectively, not only the electrophysiological changes but also the increase of oxygen consumption and of aminoacid levels induced by the hormone, were significantly inhibited. Conclusion: Altogether, these findings show that S1P biosynthesis is necessary for the electrophysiological properties and oxidative metabolism of Adn in skeletal muscle cells.
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Affiliation(s)
- Caterina Bernacchioni
- Department of Experimental and Clinical Biomedical Sciences “M. Serio”, University of Florence, 50134 Florence, Italy; (C.B.); (T.G.); (M.M.); (F.C.); (E.P.); (P.B.); (T.F.)
| | - Roberta Squecco
- Section of Physiological Sciences, Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy; (R.S.); (R.G.); (E.I.)
| | - Tania Gamberi
- Department of Experimental and Clinical Biomedical Sciences “M. Serio”, University of Florence, 50134 Florence, Italy; (C.B.); (T.G.); (M.M.); (F.C.); (E.P.); (P.B.); (T.F.)
| | - Veronica Ghini
- Magnetic Resonance Center (CERM), University of Florence, 50019 Florence, Italy; (V.G.); (P.T.)
| | - Fabian Schumacher
- Institute of Pharmacy, Freie Universität Berlin, Königin-Luise-Str. 2+4, 14195 Berlin, Germany;
| | - Michele Mannelli
- Department of Experimental and Clinical Biomedical Sciences “M. Serio”, University of Florence, 50134 Florence, Italy; (C.B.); (T.G.); (M.M.); (F.C.); (E.P.); (P.B.); (T.F.)
| | - Rachele Garella
- Section of Physiological Sciences, Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy; (R.S.); (R.G.); (E.I.)
| | - Eglantina Idrizaj
- Section of Physiological Sciences, Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy; (R.S.); (R.G.); (E.I.)
| | - Francesca Cencetti
- Department of Experimental and Clinical Biomedical Sciences “M. Serio”, University of Florence, 50134 Florence, Italy; (C.B.); (T.G.); (M.M.); (F.C.); (E.P.); (P.B.); (T.F.)
| | - Elisa Puliti
- Department of Experimental and Clinical Biomedical Sciences “M. Serio”, University of Florence, 50134 Florence, Italy; (C.B.); (T.G.); (M.M.); (F.C.); (E.P.); (P.B.); (T.F.)
| | - Paola Bruni
- Department of Experimental and Clinical Biomedical Sciences “M. Serio”, University of Florence, 50134 Florence, Italy; (C.B.); (T.G.); (M.M.); (F.C.); (E.P.); (P.B.); (T.F.)
| | - Paola Turano
- Magnetic Resonance Center (CERM), University of Florence, 50019 Florence, Italy; (V.G.); (P.T.)
| | - Tania Fiaschi
- Department of Experimental and Clinical Biomedical Sciences “M. Serio”, University of Florence, 50134 Florence, Italy; (C.B.); (T.G.); (M.M.); (F.C.); (E.P.); (P.B.); (T.F.)
| | - Chiara Donati
- Department of Experimental and Clinical Biomedical Sciences “M. Serio”, University of Florence, 50134 Florence, Italy; (C.B.); (T.G.); (M.M.); (F.C.); (E.P.); (P.B.); (T.F.)
- Correspondence: ; Tel.: +39-275-1232
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7
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Zhu Y, Fang Y, Medina D, Bartke A, Yuan R. Metformin treatment of juvenile mice alters aging-related developmental and metabolic phenotypes. Mech Ageing Dev 2022; 201:111597. [PMID: 34780856 PMCID: PMC8755607 DOI: 10.1016/j.mad.2021.111597] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 11/01/2021] [Accepted: 11/04/2021] [Indexed: 01/03/2023]
Abstract
Accumulating evidence suggests that the influence on developmental traits might have long-term effects on aging and health later in life. Metformin is a widely used drug for treating type 2 diabetes and is also used for delaying sexual maturation in girls with precocious puberty. The current report focuses on investigating the effects of metformin on development and metabolic traits. Heterogeneous mice (UM-HET3) were treated with i.p. metformin between the ages of 15 and 56 days. Our results show that body weight and food consumption were increased in both sexes, and sexual maturation was delayed in females. Tail length and circulating insulin-like growth factor 1 (IGF1) levels were significantly increased in both sexes. No significant difference was found in insulin tolerance test, but glucose tolerance was significantly reduced in the males. Circulating adiponectin and insulin levels were altered by metformin treatment in a sex-specific manner. Analysis of quantitative insulin sensitivity check index (QUICKI) suggests that metformin treatment increased insulin sensitivity in female pups, but had opposite effect in male pups. This study revealed that early life metformin treatment alters development and metabolism of mice in both sex-specific and non-specific manners. These effects of metformin may have long-term impacts on aging-related traits.
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Affiliation(s)
- Yun Zhu
- Deparment of Medical Microbiology, Immunology, and Cell Biology, Southern Illinois School of Medicine, 801 N. Rutledge, P. O. Box 19628, Springfield, Illinois 62794-9628, USA,Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P. O. Box 19628, Springfield, Illinois 62794-9628, USA
| | - Yimin Fang
- Department of Neurology, Southern Illinois University School of Medicine, 801 N. Rutledge, P. O. Box 19628, Springfield, Illinois 62794-9628, USA
| | - David Medina
- Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P. O. Box 19628, Springfield, Illinois 62794-9628, USA
| | - Andrzej Bartke
- Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P. O. Box 19628, Springfield, Illinois 62794-9628, USA
| | - Rong Yuan
- Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P. O. Box 19628, Springfield, Illinois 62794-9628, USA
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8
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Qiu Y, Li M, Zhang Y, Liu Y, Zhao Y, Zhang J, Jia Q, Li J. Berberine treatment for weight gain in patients with schizophrenia by regulating leptin rather than adiponectin. Asian J Psychiatr 2022; 67:102896. [PMID: 34773803 DOI: 10.1016/j.ajp.2021.102896] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 10/04/2021] [Accepted: 10/20/2021] [Indexed: 12/13/2022]
Abstract
BACKGROUND Berberine could improve antipsychotic-induced weight gain in obese cell lines and animal models. This study aimed to exam the effect of berberine on weight gain in patients with schizophrenia. METHODS Each subject who met DSM-IV-TR criteria for schizophrenia had been on stable dose of a single antipsychotic for at least one month. In an 8-week randomized, double-blind, placebo-controlled study, subjects received either berberine (900 mg per day) or placebo. Anthropometric parameters, leptin and adiponectin were measured at baseline, week 4, and week 8. RESULTS A total of 65 patients were enrolled, 49 of which completed the treatment. At the 8th week, the mean weight of patients in the berberine group (N = 27) lost 1.10 kg, while in the placebo group (N = 22) gained 1.45 kg. There were significant differences in body weight (Ftime*group=10.493, P = 0.001), BMI (Ftime*group=9.344, P = 0.002) and leptin (Ftime*group=6.265, P = 0.003). Further, the change of leptin had significant positive correlations with the changes of body weight(r = 0.395, P = 0.041) and BMI(r = 0.389, P = 0.045). There was no significant difference in adverse events between the two groups (P > 0.05). CONCLUSION This study suggests that berberine is a potential weight loss and weight maintenance drug for patients with schizophrenia. The effect of berberine on weight gain may be related to the regulation of leptin, but not adiponectin.
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Affiliation(s)
- Yuying Qiu
- Laboratory of Biological Psychiatry, Institute of Mental Health, Tianjin Anding Hospital, Mental Health Center of Tianjin Medical University, Tianjin, China
| | - Meijuan Li
- Laboratory of Biological Psychiatry, Institute of Mental Health, Tianjin Anding Hospital, Mental Health Center of Tianjin Medical University, Tianjin, China
| | - Yonghui Zhang
- Laboratory of Biological Psychiatry, Institute of Mental Health, Tianjin Anding Hospital, Mental Health Center of Tianjin Medical University, Tianjin, China
| | - Ying Liu
- Laboratory of Biological Psychiatry, Institute of Mental Health, Tianjin Anding Hospital, Mental Health Center of Tianjin Medical University, Tianjin, China
| | - Yongping Zhao
- Laboratory of Biological Psychiatry, Institute of Mental Health, Tianjin Anding Hospital, Mental Health Center of Tianjin Medical University, Tianjin, China
| | - Jing Zhang
- Institute of Mental Health, Suzhou Psychiatric Hospital, The Affiliated Guangji Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Qiong Jia
- Laboratory of Biological Psychiatry, Institute of Mental Health, Tianjin Anding Hospital, Mental Health Center of Tianjin Medical University, Tianjin, China
| | - Jie Li
- Laboratory of Biological Psychiatry, Institute of Mental Health, Tianjin Anding Hospital, Mental Health Center of Tianjin Medical University, Tianjin, China.
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9
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Adiponectin: Structure, Physiological Functions, Role in Diseases, and Effects of Nutrition. Nutrients 2021; 13:nu13041180. [PMID: 33918360 PMCID: PMC8066826 DOI: 10.3390/nu13041180] [Citation(s) in RCA: 98] [Impact Index Per Article: 32.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 03/28/2021] [Accepted: 03/29/2021] [Indexed: 12/12/2022] Open
Abstract
Adiponectin (a protein consisting of 244 amino acids and characterized by a molecular weight of 28 kDa) is a cytokine that is secreted from adipose tissues (adipokine). Available evidence suggests that adiponectin is involved in a variety of physiological functions, molecular and cellular events, including lipid metabolism, energy regulation, immune response and inflammation, and insulin sensitivity. It has a protective effect on neurons and neural stem cells. Adiponectin levels have been reported to be negatively correlated with cancer, cardiovascular disease, and diabetes, and shown to be affected (i.e., significantly increased) by proper healthy nutrition. The present review comprehensively overviews the role of adiponectin in a range of diseases, showing that it can be used as a biomarker for diagnosing these disorders as well as a target for monitoring the effectiveness of preventive and treatment interventions.
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10
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Goossens GH, Jocken JWE, Blaak EE. Sexual dimorphism in cardiometabolic health: the role of adipose tissue, muscle and liver. Nat Rev Endocrinol 2021; 17:47-66. [PMID: 33173188 DOI: 10.1038/s41574-020-00431-8] [Citation(s) in RCA: 151] [Impact Index Per Article: 50.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/02/2020] [Indexed: 12/11/2022]
Abstract
Obesity is associated with many adverse health effects, such as an increased cardiometabolic risk. Despite higher adiposity for a given BMI, premenopausal women are at lower risk of cardiometabolic disease than men of the same age. This cardiometabolic advantage in women seems to disappear after the menopause or when type 2 diabetes mellitus develops. Sexual dimorphism in substrate supply and utilization, deposition of excess lipids and mobilization of stored lipids in various key metabolic organs (such as adipose tissue, skeletal muscle and the liver) are associated with differences in tissue-specific insulin sensitivity and cardiometabolic risk profiles between men and women. Moreover, lifestyle-related factors and epigenetic and genetic mechanisms seem to affect metabolic complications and disease risk in a sex-specific manner. This Review provides insight into sexual dimorphism in adipose tissue distribution, adipose tissue, skeletal muscle and liver substrate metabolism and tissue-specific insulin sensitivity in humans, as well as the underlying mechanisms, and addresses the effect of these sex differences on cardiometabolic health. Additionally, this Review highlights the implications of sexual dimorphism in the pathophysiology of obesity-related cardiometabolic risk for the development of sex-specific prevention and treatment strategies.
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Affiliation(s)
- Gijs H Goossens
- Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, Netherlands.
| | - Johan W E Jocken
- Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, Netherlands
| | - Ellen E Blaak
- Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, Netherlands.
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11
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Spurny M, Jiang Y, Sowah SA, Schübel R, Nonnenmacher T, Bertheau R, Kirsten R, Johnson T, Hillengass J, Schlett CL, von Stackelberg O, Ulrich CM, Kaaks R, Kauczor HU, Kühn T, Nattenmüller J. Changes in Bone Marrow Fat upon Dietary-Induced Weight Loss. Nutrients 2020; 12:nu12051509. [PMID: 32455947 PMCID: PMC7284630 DOI: 10.3390/nu12051509] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 05/09/2020] [Accepted: 05/18/2020] [Indexed: 12/12/2022] Open
Abstract
Background: Bone marrow fat is implicated in metabolism, bone health and haematological diseases. Thus, this study aims to analyse the impact of moderate weight loss on bone marrow fat content (BMFC) in obese, healthy individuals. Methods: Data of the HELENA-Trial (Healthy nutrition and energy restriction as cancer prevention strategies: a randomized controlled intervention trial), a randomized controlled trial (RCT) among 137 non-smoking, overweight or obese participants, were analysed to quantify the Magnetic Resonance Imaging (MRI)-derived BMFC at baseline, after a 12-week dietary intervention phase, and after a 50-week follow-up. The study cohort was classified into quartiles based on changes in body weight between baseline and week 12. Changes in BMFC in respect of weight loss were analysed by linear mixed models. Spearman’s coefficients were used to assess correlations between anthropometric parameters, blood biochemical markers, blood cells and BMFC. Results: Relative changes in BMFC from baseline to week 12 were 0.0 ± 0.2%, −3.2 ± 0.1%, −6.1 ± 0.2% and −11.5 ± 0.6% for Q1 to Q4. Across all four quartiles and for the two-group comparison, Q1 versus Q4, there was a significant difference (p < 0.05) for changes in BMFC. BMFC was not associated with blood cell counts and showed only weaker correlations (<0.3) with metabolic biomarkers. Conclusion: Weight loss is associated with a decrease of BMFC. However, BMFC showed no stronger associations with inflammatory and metabolic biomarkers.
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Affiliation(s)
- Manuela Spurny
- Heidelberg University Hospital, Diagnostic and Interventional Radiology, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany; (M.S.); (Y.J.); (R.S.); (T.N.); (R.B.); (O.v.S.); (H.-U.K.)
| | - Yixin Jiang
- Heidelberg University Hospital, Diagnostic and Interventional Radiology, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany; (M.S.); (Y.J.); (R.S.); (T.N.); (R.B.); (O.v.S.); (H.-U.K.)
| | - Solomon A. Sowah
- German Cancer Research Center (DKFZ), Division of Cancer Epidemiology, Im Neuenheimer Feld 581, 69120 Heidelberg, Germany; (S.A.S.); (R.K.); (T.J.); (R.K.); (T.K.)
| | - Ruth Schübel
- Heidelberg University Hospital, Diagnostic and Interventional Radiology, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany; (M.S.); (Y.J.); (R.S.); (T.N.); (R.B.); (O.v.S.); (H.-U.K.)
- German Cancer Research Center (DKFZ), Division of Cancer Epidemiology, Im Neuenheimer Feld 581, 69120 Heidelberg, Germany; (S.A.S.); (R.K.); (T.J.); (R.K.); (T.K.)
| | - Tobias Nonnenmacher
- Heidelberg University Hospital, Diagnostic and Interventional Radiology, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany; (M.S.); (Y.J.); (R.S.); (T.N.); (R.B.); (O.v.S.); (H.-U.K.)
| | - Robert Bertheau
- Heidelberg University Hospital, Diagnostic and Interventional Radiology, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany; (M.S.); (Y.J.); (R.S.); (T.N.); (R.B.); (O.v.S.); (H.-U.K.)
| | - Romy Kirsten
- German Cancer Research Center (DKFZ), Division of Cancer Epidemiology, Im Neuenheimer Feld 581, 69120 Heidelberg, Germany; (S.A.S.); (R.K.); (T.J.); (R.K.); (T.K.)
| | - Theron Johnson
- German Cancer Research Center (DKFZ), Division of Cancer Epidemiology, Im Neuenheimer Feld 581, 69120 Heidelberg, Germany; (S.A.S.); (R.K.); (T.J.); (R.K.); (T.K.)
| | - Jens Hillengass
- Roswell Park Comprehensive Cancer Center, Elm & Carlton Streets, Buffalo, New York 14263, USA;
| | - Christopher L. Schlett
- Department of Diagnostic and Interventional Radiology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Straße 55, D-79106 Freiburg, Germany;
| | - Oyunbileg von Stackelberg
- Heidelberg University Hospital, Diagnostic and Interventional Radiology, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany; (M.S.); (Y.J.); (R.S.); (T.N.); (R.B.); (O.v.S.); (H.-U.K.)
| | - Cornelia M. Ulrich
- Huntsman Cancer Institute and Department of Population Health Sciences, University of Utah, 2000 Circle of Hope, Salt Lake City, UT 84112-5550, USA;
| | - Rudolf Kaaks
- German Cancer Research Center (DKFZ), Division of Cancer Epidemiology, Im Neuenheimer Feld 581, 69120 Heidelberg, Germany; (S.A.S.); (R.K.); (T.J.); (R.K.); (T.K.)
| | - Hans-Ulrich Kauczor
- Heidelberg University Hospital, Diagnostic and Interventional Radiology, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany; (M.S.); (Y.J.); (R.S.); (T.N.); (R.B.); (O.v.S.); (H.-U.K.)
| | - Tilman Kühn
- German Cancer Research Center (DKFZ), Division of Cancer Epidemiology, Im Neuenheimer Feld 581, 69120 Heidelberg, Germany; (S.A.S.); (R.K.); (T.J.); (R.K.); (T.K.)
| | - Johanna Nattenmüller
- Heidelberg University Hospital, Diagnostic and Interventional Radiology, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany; (M.S.); (Y.J.); (R.S.); (T.N.); (R.B.); (O.v.S.); (H.-U.K.)
- Correspondence: ; Tel.: +49-6221-5636462
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12
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Bekkering S, Saner C, Riksen NP, Netea MG, Sabin MA, Saffery R, Stienstra R, Burgner DP. Trained Immunity: Linking Obesity and Cardiovascular Disease across the Life-Course? Trends Endocrinol Metab 2020; 31:378-389. [PMID: 32305098 DOI: 10.1016/j.tem.2020.01.008] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 12/17/2019] [Accepted: 01/09/2020] [Indexed: 02/06/2023]
Abstract
Obesity, a chronic inflammatory disease, is the most prevalent modifiable risk factor for cardiovascular disease. The mechanisms underlying inflammation in obesity are incompletely understood. Recent developments have challenged the dogma of immunological memory occurring exclusively in the adaptive immune system and show that the innate immune system has potential to be reprogrammed. This innate immune memory (trained immunity) is characterized by epigenetic and metabolic reprogramming of myeloid cells following endogenous or exogenous stimulation, resulting in enhanced inflammation to subsequent stimuli. Trained immunity phenotypes have now been reported for other immune and non-immune cells. Here, we provide a novel perspective on the putative role of trained immunity in mediating the adverse cardiovascular effects of obesity and highlight potential translational pathways.
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Affiliation(s)
- Siroon Bekkering
- Murdoch Children's Research Institute, The Royal Children's Hospital, Parkville, Victoria, Australia; Department of Internal Medicine and Radboud Institute for Molecular Life Sciences, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Christoph Saner
- Murdoch Children's Research Institute, The Royal Children's Hospital, Parkville, Victoria, Australia; Department of Endocrinology, The Royal Children's Hospital, Parkville, Victoria, Australia
| | - Niels P Riksen
- Department of Internal Medicine and Radboud Institute for Molecular Life Sciences, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Mihai G Netea
- Department of Internal Medicine and Radboud Institute for Molecular Life Sciences, Radboud University Medical Centre, Nijmegen, The Netherlands; Department for Immunology & Metabolism, Life and Medical Sciences Institute (LIMES), University of Bonn, Bonn, Germany
| | - Matthew A Sabin
- Murdoch Children's Research Institute, The Royal Children's Hospital, Parkville, Victoria, Australia; Department of Endocrinology, The Royal Children's Hospital, Parkville, Victoria, Australia; Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia
| | - Richard Saffery
- Murdoch Children's Research Institute, The Royal Children's Hospital, Parkville, Victoria, Australia; Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia
| | - Rinke Stienstra
- Department of Internal Medicine and Radboud Institute for Molecular Life Sciences, Radboud University Medical Centre, Nijmegen, The Netherlands; Division of Human Nutrition and Health, Wageningen University, Wageningen, The Netherlands
| | - David P Burgner
- Murdoch Children's Research Institute, The Royal Children's Hospital, Parkville, Victoria, Australia; Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia.
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13
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Kumar S, Hirani T, Patel V, Hirani S, Mohammed I, Shishoo D. Expression of apelin among the individuals of chronic periodontitis, with and without type ii diabetes mellitus: A study using enzyme-linked immunosorbent assay. ADVANCES IN HUMAN BIOLOGY 2020. [DOI: 10.4103/aihb.aihb_84_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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14
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Szkudelska K, Deniziak M, Hertig I, Wojciechowicz T, Tyczewska M, Jaroszewska M, Szkudelski T. Effects of Resveratrol in Goto-Kakizaki Rat, a Model of Type 2 Diabetes. Nutrients 2019; 11:nu11102488. [PMID: 31623226 PMCID: PMC6836277 DOI: 10.3390/nu11102488] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Revised: 10/05/2019] [Accepted: 10/11/2019] [Indexed: 12/19/2022] Open
Abstract
Resveratrol exhibits a pleiotropic, favorable action under various pathological conditions, including type 2 diabetes. However, its anti-diabetic effects in animal models and human trials have not been fully elucidated. The aim of the present study was to determine whether resveratrol is capable of inducing beneficial changes in the Goto-Kakizaki rat, a spontaneous model of diabetes, which in several aspects is similar to type 2 diabetes in humans. Goto-Kakizaki (GK) rats and control Sprague–Dawley (SD) rats were treated intragastrically with resveratrol (20 mg/kg b.w./day) for 10 weeks. Then, a glucose tolerance test was performed and levels of some adipokines in blood were measured. Moreover, lipid contents in skeletal muscle and liver tissues, along with the expression and phosphorylation of pivotal enzymes (AMP—activated protein kinase—AMPK, acetyl-CoA carboxylase—ACC, protein kinase B—Akt) in these tissues were determined. Histology of pancreatic islets was also compared. GK rats non-treated with resveratrol displayed a marked glucose intolerance and had increased lipid accumulation in the skeletal muscle. Moreover, upregulation of the expression and phosphorylation of AMPK, ACC and Akt was shown in the muscle tissue of GK rats. Those rats also had an abnormal structure of pancreatic islets compared with control animals. However, treatment with resveratrol improved glucose tolerance and prevented lipid accumulation in the skeletal muscle of GK rats. This effect was associated with a substantial normalization of expression and phosphorylation of ACC and Akt. In GK rats subjected to resveratrol therapy, the structure of pancreatic islets was also clearly improved. Moreover, blood adiponectin and leptin levels were partially normalized by resveratrol in GK rats. It was revealed that resveratrol ameliorates key symptoms of diabetes in GK rats. This compound improved glucose tolerance, which was largely linked to beneficial changes in skeletal muscle. Resveratrol also positively affected pancreatic islets. Our new findings show that resveratrol has therapeutic potential in GK rats.
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Affiliation(s)
- Katarzyna Szkudelska
- Department of Animal Physiology and Biochemistry, Poznan University of Life Sciences, Wołyńska 35, 60-637 Poznań, Poland.
| | - Marzanna Deniziak
- Department of Biochemistry and Cell Biology, University of Rzeszow, Zelwerowicza 4, 35-601 Rzeszów, Poland.
| | - Iwona Hertig
- Department of Animal Physiology and Biochemistry, Poznan University of Life Sciences, Wołyńska 35, 60-637 Poznań, Poland.
| | - Tatiana Wojciechowicz
- Department of Animal Physiology and Biochemistry, Poznan University of Life Sciences, Wołyńska 35, 60-637 Poznań, Poland.
| | - Marianna Tyczewska
- Department of Histology and Embryology, Poznan University of Medical Sciences, Święcickiego 6, 60-781 Poznań, Poland.
| | - Magdalena Jaroszewska
- Department of Animal Physiology and Biochemistry, Poznan University of Life Sciences, Wołyńska 35, 60-637 Poznań, Poland.
| | - Tomasz Szkudelski
- Department of Animal Physiology and Biochemistry, Poznan University of Life Sciences, Wołyńska 35, 60-637 Poznań, Poland.
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Barbe A, Bongrani A, Mellouk N, Estienne A, Kurowska P, Grandhaye J, Elfassy Y, Levy R, Rak A, Froment P, Dupont J. Mechanisms of Adiponectin Action in Fertility: An Overview from Gametogenesis to Gestation in Humans and Animal Models in Normal and Pathological Conditions. Int J Mol Sci 2019; 20:ijms20071526. [PMID: 30934676 PMCID: PMC6479753 DOI: 10.3390/ijms20071526] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 03/20/2019] [Accepted: 03/22/2019] [Indexed: 02/06/2023] Open
Abstract
Adiponectin is the most abundant plasma adipokine. It mainly derives from white adipose tissue and plays a key role in the control of energy metabolism thanks to its insulin-sensitising, anti-inflammatory, and antiatherogenic properties. In vitro and in vivo evidence shows that adiponectin could also be one of the hormones controlling the interaction between energy balance and fertility in several species, including humans. Indeed, its two receptors—AdipoR1 and AdipoR2—are expressed in hypothalamic–pituitary–gonadal axis and their activation regulates Kiss, GnRH and gonadotropin expression and/or secretion. In male gonads, adiponectin modulates several functions of both somatic and germ cells, such as steroidogenesis, proliferation, apoptosis, and oxidative stress. In females, it controls steroidogenesis of ovarian granulosa and theca cells, oocyte maturation, and embryo development. Adiponectin receptors were also found in placental and endometrial cells, suggesting that this adipokine might play a crucial role in embryo implantation, trophoblast invasion and foetal growth. The aim of this review is to characterise adiponectin expression and its mechanism of action in male and female reproductive tract. Further, since features of metabolic syndrome are associated with some reproductive diseases, such as polycystic ovary syndrome, gestational diabetes mellitus, preeclampsia, endometriosis, foetal growth restriction and ovarian and endometrial cancers, evidence regarding the emerging role of adiponectin in these disorders is also discussed.
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Affiliation(s)
- Alix Barbe
- INRA UMR85 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.
- CNRS UMR7247 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.
- Université François Rabelais de Tours, F-37041 Tours, France.
| | - Alice Bongrani
- INRA UMR85 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.
- CNRS UMR7247 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.
- Université François Rabelais de Tours, F-37041 Tours, France.
| | - Namya Mellouk
- INRA UMR85 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.
- CNRS UMR7247 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.
- Université François Rabelais de Tours, F-37041 Tours, France.
| | - Anthony Estienne
- INRA UMR85 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.
- CNRS UMR7247 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.
- Université François Rabelais de Tours, F-37041 Tours, France.
| | - Patrycja Kurowska
- Department of Physiology and Toxicology of Reproduction, Institute of Zoology and Biomedical Research, Jagiellonian University, 31-007 Krakow, Poland.
| | - Jérémy Grandhaye
- INRA UMR85 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.
- CNRS UMR7247 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.
- Université François Rabelais de Tours, F-37041 Tours, France.
| | - Yaelle Elfassy
- Assistance Publique des Hôpitaux de Paris, Hôpital Tenon, Service de Biologie de la Reproduction, F-75020 Paris, France.
- Université Pierre et Marie Curie Paris 6, F-75005 Paris, France.
- INSERM UMRS_938, Centre de Recherche Saint-Antoine, F-75571 Paris, France.
| | - Rachel Levy
- Assistance Publique des Hôpitaux de Paris, Hôpital Tenon, Service de Biologie de la Reproduction, F-75020 Paris, France.
- Université Pierre et Marie Curie Paris 6, F-75005 Paris, France.
- INSERM UMRS_938, Centre de Recherche Saint-Antoine, F-75571 Paris, France.
| | - Agnieszka Rak
- CNRS UMR7247 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.
| | - Pascal Froment
- INRA UMR85 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.
- CNRS UMR7247 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.
- Université François Rabelais de Tours, F-37041 Tours, France.
| | - Joëlle Dupont
- INRA UMR85 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.
- CNRS UMR7247 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.
- Université François Rabelais de Tours, F-37041 Tours, France.
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Khakurel A, Park PH. Globular adiponectin protects hepatocytes from tunicamycin-induced cell death via modulation of the inflammasome and heme oxygenase-1 induction. Pharmacol Res 2018; 128:231-243. [DOI: 10.1016/j.phrs.2017.10.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 09/26/2017] [Accepted: 10/18/2017] [Indexed: 02/07/2023]
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Integrated Immunomodulatory Mechanisms through which Long-Chain n-3 Polyunsaturated Fatty Acids Attenuate Obese Adipose Tissue Dysfunction. Nutrients 2017; 9:nu9121289. [PMID: 29186929 PMCID: PMC5748740 DOI: 10.3390/nu9121289] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 11/14/2017] [Accepted: 11/16/2017] [Indexed: 12/13/2022] Open
Abstract
Obesity is a global health concern with rising prevalence that increases the risk of developing other chronic diseases. A causal link connecting overnutrition, the development of obesity and obesity-associated co-morbidities is visceral adipose tissue (AT) dysfunction, characterized by changes in the cellularity of various immune cell populations, altered production of inflammatory adipokines that sustain a chronic state of low-grade inflammation and, ultimately, dysregulated AT metabolic function. Therefore, dietary intervention strategies aimed to halt the progression of obese AT dysfunction through any of the aforementioned processes represent an important active area of research. In this connection, fish oil-derived dietary long-chain n-3 polyunsaturated fatty acids (PUFA) in the form of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) have been demonstrated to attenuate obese AT dysfunction through multiple mechanisms, ultimately affecting AT immune cellularity and function, adipokine production, and metabolic signaling pathways, all of which will be discussed herein.
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Abstract
PURPOSE OF REVIEW Adiponectin is an adipokine with anti-inflammatory, antioxidant, antiatherogenic, pro-angiogenic, vasoprotective and insulin-sensitizing properties. Several factors may influence adiponectin levels, such as genetic polymorphisms, obesity / body fat distribution, diet and exercise as well as cardiovascular risk factors such as sleep deprivation and smoking as well as medications. Adiponectin has been proposed as a potential prognostic biomarker and a therapeutic target in patients with cardiometabolic diseases. RECENT FINDINGS This narrative review discusses the associations of adiponectin with obesity-related metabolic disorders (metabolic syndrome, nonalcoholic fatty liver disease, hyperuricaemia and type 2 diabetes mellitus). We also focus on the links between adiponectin and lipid disorders and with coronary heart disease and noncardiac vascular diseases (i.e. stroke, peripheral artery disease, carotid artery disease, atherosclerotic renal artery stenosis, abdominal aortic aneurysms and chronic kidney disease). Further, the effects of lifestyle interventions and drug therapy on adiponectin levels are briefly reviewed. SUMMARY Based on available data, adiponectin represents a multifaceted biomarker that may beneficially affect atherosclerosis, inflammation and insulin resistance pathways. However, there are conflicting results with regard to the associations between adiponectin levels and the prevalence and outcomes of cardiometabolic diseases. Further research on the potential clinical implications of adiponectin in the diagnosis and treatment of such diseases is needed.
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Affiliation(s)
- Niki Katsiki
- aSecond Department of Propaedeutic Internal Medicine, Medical School, Aristotle University of Thessaloniki, Hippocration Hospital, Thessaloniki, Greece bDivision of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA cDepartment of Clinical Biochemistry, Royal Free Hospital Campus, University College London Medical School, University College London (UCL), London, UK
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Horowitz MC, Berry R, Holtrup B, Sebo Z, Nelson T, Fretz JA, Lindskog D, Kaplan JL, Ables G, Rodeheffer MS, Rosen CJ. Bone marrow adipocytes. Adipocyte 2017; 6:193-204. [PMID: 28872979 DOI: 10.1080/21623945.2017.1367881] [Citation(s) in RCA: 118] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Adipocytes were identified in human bone marrow more than a century ago, yet until recently little has been known about their origin, development, function or interactions with other cells in the bone marrow. Little functional significance has been attributed to these cells, a paradigm that still persists today. However, we now know that marrow adipose tissue increases with age and in response to a variety of physiologic induction signals. Bone marrow adipocytes have recently been shown to influence other cell populations within the marrow and can affect whole body metabolism by the secretion of a defined set of adipokines. Recent research shows that marrow adipocytes are distinct from white, brown and beige adipocytes, indicating that the bone marrow is a distinct adipose depot. This review will highlight recent data regarding these areas and the interactions of marrow adipose tissue (MAT) with cells within and outside of the bone marrow.
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Affiliation(s)
- Mark C. Horowitz
- Department of Orthopaedics and Rehabilitation, Yale University School of Medicine, New Haven, CT, USA
| | - Ryan Berry
- Department of Orthopaedics and Rehabilitation, Yale University School of Medicine, New Haven, CT, USA
| | - Brandon Holtrup
- Department of Molecular, Cell, and Developmental Biology, Yale University, New Haven, CT, USA
| | - Zachary Sebo
- Department of Molecular, Cell, and Developmental Biology, Yale University, New Haven, CT, USA
| | - Tracy Nelson
- Department of Orthopaedics and Rehabilitation, Yale University School of Medicine, New Haven, CT, USA
| | - Jackie A. Fretz
- Department of Orthopaedics and Rehabilitation, Yale University School of Medicine, New Haven, CT, USA
| | - Dieter Lindskog
- Department of Orthopaedics and Rehabilitation, Yale University School of Medicine, New Haven, CT, USA
| | - Jennifer L. Kaplan
- Department of Comparative Medicine and Molecular, Cellular, and Developmental Biology, Yale University School of Medicine, New Haven, CT, USA
| | - Gene Ables
- Orentreich Foundation for the Advancement of Science, Cold Spring, NY, USA
| | - Matthew S. Rodeheffer
- Department of Comparative Medicine and Molecular, Cellular, and Developmental Biology, Yale University School of Medicine, New Haven, CT, USA
| | - Clifford J. Rosen
- The Center for Clinical and Translational Research, Maine Medical Center Research Institute, Scarborough, ME, USA
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Wang Y, Ma XL, Lau WB. Cardiovascular Adiponectin Resistance: The Critical Role of Adiponectin Receptor Modification. Trends Endocrinol Metab 2017; 28:519-530. [PMID: 28473178 PMCID: PMC6391995 DOI: 10.1016/j.tem.2017.03.004] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2016] [Revised: 03/01/2017] [Accepted: 03/28/2017] [Indexed: 12/23/2022]
Abstract
For the past two decades, a great deal of research has been published concerning adiponectin (APN), an abundant protein responsible for regulating numerous biologic functions including antioxidative, antinitrative, anti-inflammatory, and cardioprotective effects. A review of APN and its two major receptors is timely because of new findings concerning the mechanisms by which APN signaling may be altered in pathologic processes such as diabetes and heart failure. In this review we elaborate on currently known information regarding the physiologic role of APN and the known mechanisms underlying pathologic APN resistance - namely, APN receptor downregulation and phosphorylation - and provide insight regarding the future directions of APN research including an assessment of the clinical applicability of preventing pathologic post-translational modification of the APN receptor.
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Affiliation(s)
- Yajing Wang
- Department of Emergency Medicine, Thomas Jefferson University, 1025 Walnut Street, Philadelphia, PA 19107, USA
| | - Xin L Ma
- Department of Emergency Medicine, Thomas Jefferson University, 1025 Walnut Street, Philadelphia, PA 19107, USA
| | - Wayne Bond Lau
- Department of Emergency Medicine, Thomas Jefferson University, 1025 Walnut Street, Philadelphia, PA 19107, USA.
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Orchard TJ, Cariou B, Connelly MA, Otvos JD, Zhang S, Antalis CJ, Ivanyi T, Hoogwerf BJ. The effects of basal insulin peglispro vs. insulin glargine on lipoprotein particles by NMR and liver fat content by MRI in patients with diabetes. Cardiovasc Diabetol 2017; 16:73. [PMID: 28587667 PMCID: PMC5461740 DOI: 10.1186/s12933-017-0555-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 05/26/2017] [Indexed: 12/23/2022] Open
Abstract
Background In Phase 2/3 studies of basal insulin peglispro (BIL) compared to insulin glargine, patients with type 1 or type 2 diabetes previously treated with insulin and randomized to BIL had an increase in serum triglycerides (TGs). To further understand lipoprotein changes, a lipid substudy which included liver fat content was designed to assess relationships among the measured variables for each diabetes cohort and compare the hepato-preferential insulin BIL to glargine. Methods In three cohorts of patients with diabetes (type 1, type 2 insulin naïve, and type 2 previously on insulin; n = 652), liver fat content (LFC) was determined by magnetic resonance imaging (MRI) and blood lipids were analyzed by nuclear magnetic resonance (NMR) spectroscopy at baseline, 26 and 52 weeks of treatment. Apolipoproteins, adiponectin, and other lipid parameters were also measured. Descriptive statistics were done, as well as correlation analyses to look for relationships among LFC and lipoproteins or other lipid measures. Results In patients with type 1 diabetes treated with BIL, but not glargine, small LDL and medium and large VLDL subclass concentrations increased from baseline. In patients with type 2 diabetes previously on insulin and treated with BIL, large VLDL concentration increased from baseline. In insulin naïve patients with type 2 diabetes treated with BIL, there were very few changes, while in those treated with glargine, small LDL and large VLDL decreased from baseline. Baseline LFC correlated significantly in one or more cohorts with baseline large VLDL, small LDL, VLDL size, and Apo C3. Changes in LFC by treatment showed generally weak correlations with lipoprotein changes, except for positive correlations with large VLDL and VLDL size. Adiponectin was higher in patients with type 1 diabetes compared to patients with type 2 diabetes, but decreased with treatment with both BIL and glargine. Conclusions The lipoprotein changes were in line with the observed changes in serum TGs; i.e., the cohorts experiencing increased TGs and LFC with BIL treatment had decreased LDL size and increased VLDL size. These data and analyses add to the currently available information on the metabolic effects of insulins in a very carefully characterized cohort of patients with diabetes. Clinicaltrials.gov registration numbers and dates NCT01481779 (2011), NCT01435616 (2011), NCT01454284 (2011), NCT01582451 (2012) Electronic supplementary material The online version of this article (doi:10.1186/s12933-017-0555-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Trevor J Orchard
- Department of Epidemiology, GSPH, University of Pittsburgh, Pittsburgh, PA, USA
| | - Bertrand Cariou
- l'Institut du Thorax, CHU Nantes INSERM, CNRS, UNIV Nantes, Nantes, France
| | - Margery A Connelly
- LipoScience, Laboratory Corporation of America Holdings, Morrisville, NC, 27560, USA
| | - James D Otvos
- LipoScience, Laboratory Corporation of America Holdings, Morrisville, NC, 27560, USA
| | - Shuyu Zhang
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN, 46285, USA
| | - Caryl J Antalis
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN, 46285, USA
| | | | - Byron J Hoogwerf
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN, 46285, USA.
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Nicolas A, Aubert R, Bellili-Muñoz N, Balkau B, Bonnet F, Tichet J, Velho G, Marre M, Roussel R, Fumeron F. T-cadherin gene variants are associated with type 2 diabetes and the Fatty Liver Index in the French population. DIABETES & METABOLISM 2017; 43:33-39. [DOI: 10.1016/j.diabet.2016.05.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 04/26/2016] [Accepted: 05/10/2016] [Indexed: 11/30/2022]
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Effect of Extended-Release Niacin/Laropiprant Combination on Plasma Adiponectin and Insulin Resistance in Chinese Patients with Dyslipidaemia. DISEASE MARKERS 2015; 2015:154014. [PMID: 26063948 PMCID: PMC4429190 DOI: 10.1155/2015/154014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Accepted: 04/09/2015] [Indexed: 12/15/2022]
Abstract
Objectives. This study examined whether the increase of adiponectin associated with extended-release (ER) niacin/laropiprant combination attenuates the adverse effect of niacin on glucose and insulin resistance in Hong Kong Chinese patients with dyslipidaemia. Methods. Patients (N = 121) were treated with ER niacin/laropiprant 1 g/20 mg for 4 weeks and then the dose was doubled for an additional 8 weeks. Measurements of fasting lipids, glucose, insulin, and adiponectin were performed at baseline and during the study. Results. There were significant (P < 0.001) increases in glucose (9.4 ± 13.1%), insulin (70.2 ± 91.0%), HOMA-IR (87.8 ± 103.9%), and adiponectin (169.3 ± 111.6%). The increase in adiponectin was significantly associated with increase in glucose (r = 0.221, P < 0.05), insulin (r = 0.184, P < 0.05), and HOMA-IR (r = 0.237, P < 0.01) and the association remained significant after adjustment for changes in body weight or body fat mass. Conclusion. Treatment with ER niacin/laropiprant led to a significant increase in adiponectin levels but worsening of glucose levels and insulin resistance, and the increase in adiponectin and insulin resistance were correlated suggesting the increase in adiponectin did not ameliorate the deterioration in insulin resistance. Clinical trial is registered with number on WHO-ICTRP: ChiCTR-ONC-10001038.
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24
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Bertrand C, Valet P, Castan-Laurell I. Apelin and energy metabolism. Front Physiol 2015; 6:115. [PMID: 25914650 PMCID: PMC4392293 DOI: 10.3389/fphys.2015.00115] [Citation(s) in RCA: 138] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 03/26/2015] [Indexed: 01/06/2023] Open
Abstract
A wide range of adipokines identified over the past years has allowed considering the white adipose tissue as a secretory organ closely integrated into overall physiological and metabolic control. Apelin, a ubiquitously expressed peptide was known to exert different physiological effects mainly on the cardiovascular system and the regulation of fluid homeostasis prior to its characterization as an adipokine. This has broadened its range of action and apelin now appears clearly as a new player in energy metabolism in addition to leptin and adiponectin. Apelin has been shown to act on glucose and lipid metabolism but also to modulate insulin secretion. Moreover, different studies in both animals and humans have shown that plasma apelin concentrations are usually increased during obesity and type 2 diabetes. This mini-review will focus on the various systemic apelin effects on energy metabolism by addressing its mechanisms of action. The advances concerning the role of apelin in metabolic diseases in relation with the recent reports on apelin concentrations in obese and/or diabetic subjects will also be discussed.
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Affiliation(s)
- Chantal Bertrand
- Institut National de la Santé et de la Recherche Médicale, U1048 Toulouse, France ; Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université Toulouse III-Paul Sabatier Toulouse, France
| | - Philippe Valet
- Institut National de la Santé et de la Recherche Médicale, U1048 Toulouse, France ; Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université Toulouse III-Paul Sabatier Toulouse, France
| | - Isabelle Castan-Laurell
- Institut National de la Santé et de la Recherche Médicale, U1048 Toulouse, France ; Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université Toulouse III-Paul Sabatier Toulouse, France
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25
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Maki KC, Yurko-Mauro K, Dicklin MR, Schild AL, Geohas JG. A new, microalgal DHA- and EPA-containing oil lowers triacylglycerols in adults with mild-to-moderate hypertriglyceridemia. Prostaglandins Leukot Essent Fatty Acids 2014; 91:141-8. [PMID: 25123060 DOI: 10.1016/j.plefa.2014.07.012] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Revised: 07/11/2014] [Accepted: 07/14/2014] [Indexed: 11/21/2022]
Abstract
In this double-blind, parallel trial, 93 healthy adults with hypertriglyceridemia (triacylglycerols [TAG] 150-499 mg/dL) were randomized to receive either a nutritional oil derived from marine algae (DHA-O; 2.4 g/day docosahexaenoic acid [DHA] and eicosapentaenoic acid [EPA] in a 2.7:1 ratio), fish oil (FO; 2.0 g/day DHA and EPA in a 0.7:1 ratio), or a corn oil/soy oil control as 4-1g softgel capsules/day with meals for 14 weeks; and were instructed to maintain their habitual diet. Percent changes from baseline for DHA-O, FO, and control, respectively, were TAG (-18.9, -22.9, 3.5; p<0.001 DHA-O and FO vs. control), low-density lipoprotein cholesterol (4.6, 6.8, -0.6; p<0.05 DHA-O and FO vs. control), and high-density lipoprotein cholesterol (4.3, 6.9, 0.6; p<0.05 FO vs. control). This study demonstrated that ingestion of microalgal DHA-O providing 2.4 g/day DHA+EPA lowered TAG levels to a degree that was not different from that of a standard fish oil product, and that was significantly more than for a corn oil/soy oil control.
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Affiliation(s)
- Kevin C Maki
- Biofortis Clinical Research, Addison, IL, United States.
| | | | | | | | - Jeffrey G Geohas
- Evanston Premier Healthcare Research, Evanston, IL, United States
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Gunawardana SC. Benefits of healthy adipose tissue in the treatment of diabetes. World J Diabetes 2014; 5:420-430. [PMID: 25126390 PMCID: PMC4127579 DOI: 10.4239/wjd.v5.i4.420] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 03/24/2014] [Accepted: 06/03/2014] [Indexed: 02/05/2023] Open
Abstract
The major malfunction in diabetes mellitus is severe perturbation of glucose homeostasis caused by deficiency of insulin. Insulin deficiency is either absolute due to destruction or failure of pancreatic β cells, or relative due to decreased sensitivity of peripheral tissues to insulin. The primary lesion being related to insulin, treatments for diabetes focus on insulin replacement and/or increasing sensitivity to insulin. These therapies have their own limitations and complications, some of which can be life-threatening. For example, exogenous insulin administration can lead to fatal hypoglycemic episodes; islet/pancreas transplantation requires life-long immunosuppressive therapy; and anti-diabetic drugs have dangerous side effects including edema, heart failure and lactic acidosis. Thus the need remains for better safer long term treatments for diabetes. The ultimate goal in treating diabetes is to re-establish glucose homeostasis, preferably through endogenously generated hormones. Recent studies increasingly show that extra-pancreatic hormones, particularly those arising from adipose tissue, can compensate for insulin, or entirely replace the function of insulin under appropriate circumstances. Adipose tissue is a versatile endocrine organ that secretes a variety of hormones with far-reaching effects on overall metabolism. While unhealthy adipose tissue can exacerbate diabetes through limiting circulation and secreting of pro-inflammatory cytokines, healthy uninflamed adipose tissue secretes beneficial adipokines with hypoglycemic and anti-inflammatory properties, which can complement and/or compensate for the function of insulin. Administration of specific adipokines is known to alleviate both type 1 and 2 diabetes, and leptin mono-therapy is reported to reverse type 1 diabetes independent of insulin. Although specific adipokines may correct diabetes, administration of individual adipokines still carries risks similar to those of insulin monotherapy. Thus a better approach is to achieve glucose homeostasis with endogenously-generated adipokines through transplantation or regeneration of healthy adipose tissue. Our recent studies on mouse models show that type 1 diabetes can be reversed without insulin through subcutaneous transplantation of embryonic brown adipose tissue, which leads to replenishment of recipients’ white adipose tissue; increase of a number of beneficial adipokines; and fast and long-lasting euglycemia. Insulin-independent glucose homeostasis is established through a combination of endogenously generated hormones arising from the transplant and/or newly-replenished white adipose tissue. Transplantation of healthy white adipose tissue is reported to alleviate type 2 diabetes in rodent models on several occasions, and increasing the content of endogenous brown adipose tissue is known to combat obesity and type 2 diabetes in both humans and animal models. While the underlying mechanisms are not fully documented, the beneficial effects of healthy adipose tissue in improving metabolism are increasingly reported, and are worthy of attention as a powerful tool in combating metabolic disease.
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Lindén J, Lensu S, Pohjanvirta R. Effect of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) on hormones of energy balance in a TCDD-sensitive and a TCDD-resistant rat strain. Int J Mol Sci 2014; 15:13938-66. [PMID: 25119860 PMCID: PMC4159833 DOI: 10.3390/ijms150813938] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 07/24/2014] [Accepted: 07/29/2014] [Indexed: 01/16/2023] Open
Abstract
One of the hallmarks of the acute toxicity of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) is a drastically reduced feed intake by an unknown mechanism. To further elucidate this wasting syndrome, we followed the effects of a single large dose (100 μg/kg) of TCDD on the serum levels of several energy balance-influencing hormones, clinical chemistry variables, and hepatic aryl hydrocarbon receptor (AHR) expression in two rat strains that differ widely in their TCDD sensitivities, for up to 10 days. TCDD affected most of the analytes in sensitive Long-Evans rats, while there were few alterations in the resistant Han/Wistar strain. However, analyses of feed-restricted unexposed Long-Evans rats indicated several of the perturbations to be secondary to energy deficiency. Notable increases in ghrelin and glucagon occurred in TCDD-treated Long-Evans rats alone, which links these hormones to the wasting syndrome. The newly found energy balance regulators, insulin-like growth factor 1 and fibroblast growth factor 21 (FGF-21), appeared to function in concert in body weight loss-induced metabolic state, and FGF-21 was putatively linked to increased lipolysis induced by TCDD. Finally, we demonstrate a reverse set of changes in the AHR protein and mRNA response to TCDD and feed restriction, suggesting that AHR might function also as a physiological regulator, possibly involved in the maintenance of energy balance.
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Affiliation(s)
- Jere Lindén
- Department of Veterinary Biosciences, Faculty of Veterinary Medicine, University of Helsinki, P.O. Box 66, FI-00014 Helsinki, Finland.
| | - Sanna Lensu
- Department of Biology of Physical Activity, Faculty of Sport and Health Sciences, University of Jyväskylä, P.O. Box 35, FI-40014 Jyväskylä, Finland.
| | - Raimo Pohjanvirta
- Department of Food Hygiene and Environmental Health, Faculty of Veterinary Medicine, University of Helsinki, P.O. Box 66, FI-00014 Helsinki, Finland.
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Fiaschi T, Magherini F, Gamberi T, Modesti PA, Modesti A. Adiponectin as a tissue regenerating hormone: more than a metabolic function. Cell Mol Life Sci 2014; 71:1917-25. [PMID: 24322911 PMCID: PMC11113778 DOI: 10.1007/s00018-013-1537-4] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 11/24/2013] [Accepted: 11/25/2013] [Indexed: 02/04/2023]
Abstract
The great interest that scientists have for adiponectin is primarily due to its central metabolic role. Indeed, the major function of this adipokine is the control of glucose homeostasis that it exerts regulating liver and muscle metabolism. Adiponectin has insulin-sensitizing action and leads to down-regulation of hepatic gluconeogenesis and an increase of fatty acid oxidation. In addition, adiponectin is reported to play an important role in the inhibition of inflammation. The hormone is secreted in full-length form, which can either assemble into complexes or be converted into globular form by proteolytic cleavage. Over the past few years, emerging publications reveal a more varied and pleiotropic action of this hormone. Many studies emphasize a key role of adiponectin during tissue regeneration and show that adiponectin deficiency greatly inhibits the mechanisms underlying tissue renewal. This review deals with the role of adiponectin in tissue regeneration, mainly referring to skeletal muscle regeneration, a process in which adiponectin is deeply involved. In this tissue, globular adiponectin increases proliferation, migration and myogenic properties of both resident stem cells (namely satellite cells) and non-resident muscle precursors (namely mesoangioblasts). Furthermore, skeletal muscle could be a site for the local production of the globular form that occurs in an inflamed environment. Overall, these recent findings contribute to highlight an intriguing function of adiponectin in addition to its well-recognized metabolic action.
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Affiliation(s)
- Tania Fiaschi
- Dipartimento di Scienze Biomediche, Sperimentali e Cliniche, Universita' degli Studi di Firenze, Viale Morgagni 50, 50134, Florence, Italy,
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Zhang W, Wu R, Zhang F, Xu Y, Liu B, Yang Y, Zhou H, Wang L, Wan K, Xiao X, Zhang X. Thiazolidinediones improve hepatic fibrosis in rats with non-alcoholic steatohepatitis by activating the adenosine monophosphate-activated protein kinase signalling pathway. Clin Exp Pharmacol Physiol 2014; 39:1026-33. [PMID: 23127227 DOI: 10.1111/1440-1681.12020] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2012] [Revised: 09/15/2012] [Accepted: 10/01/2012] [Indexed: 01/28/2023]
Abstract
Thiazolidinediones (TZDs) markedly reduce hepatic steatosis in both rodents and humans. However, the effects and mechanisms of action of TZDs on hepatic fibrosis remain unclear. The aim of the present study was to determine the effects of TZDs on histological changes in the liver and on the modulation by adiponectin via the AMP-activated protein kinase (AMPK) signalling pathway in rats with non-alcoholic steatohepatitis (NASH). Forty rats were divided into normal control, high-fat diet (HFD), pioglitazone control and pioglitazone intervention groups. After 24 weeks treatment with pioglitazone (10 mg/kg per day by gavage), changes in liver histology, serum aminotransaminase, triglyceride (TG), free fatty acid (FFA), glucose, insulin, adiponectin and transforming growth factor (TGF)-β1 concentrations and hepatic adiponectin, AMPK, α-smooth muscle actin (α-SMA) and collagen I expression were evaluated. The degree of hepatic steatosis and fibrosis was significantly higher in HFD-induced NASH rats compared with normal controls, as were serum concentrations of aminotransaminase, TG, FFA, glucose, insulin and TGF-β1 and hepatic expression of α-SMA and collagen I protein. Serum adiponectin concentrations and hepatic expression of adiponectin mRNA and AMPK protein were significantly lower in the HFD-induced NASH rats compared with the normal control. Pioglitazone significantly reduced the degree of hepatic steatosis and fibrosis, as well as serum concentrations of aminotransaminase, TG, FFA, glucose, insulin and TGF-β1 and hepatic expression of α-SMA and collagen I protein. In addition, pioglitazone significantly increased serum adiponectin concentrations and hepatic expression of adiponectin mRNA and AMPK protein. In conclusion, the TZD pioglitazone improved hepatic fibrosis in rats with NASH by upregulating adiponectin expression and activating AMPK, thus subsequently inhibiting the activation of hepatic stellate cells and the overproduction of extracellular matrix.
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Affiliation(s)
- Wei Zhang
- Departments of Gastroenterology and Hepatology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
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Zhang Y, Wang XL, Zhao J, Wang YJ, Lau WB, Yuan YX, Gao EH, Koch WJ, Ma XL. Adiponectin inhibits oxidative/nitrative stress during myocardial ischemia and reperfusion via PKA signaling. Am J Physiol Endocrinol Metab 2013; 305:E1436-43. [PMID: 24129398 PMCID: PMC3882378 DOI: 10.1152/ajpendo.00445.2013] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The cardioprotective effects of adiponectin (APN) against myocardial ischemia/reperfusion (MI/R) injury are well known. However, comprehension of the mechanisms mediating intracellular APN signaling remains incomplete. We recently demonstrate the antioxidant/antinitrative effects of APN are not dependent on AMPK. Protein kinase A (PKA) has been previously shown to be activated by APN, with uncertain relevance to APN cardiac protection. The current study determined whether the antioxidative/antinitrative effect of APN is mediated by PKA. Administration of APN (2 μg/g) 10 min before reperfusion significantly enhanced cardiac PKA activity, reduced oxidative stress, and decreased infarct size. Knockdown of cardiac PKA expression (PKA-KD) by intramyocardial injection of PKA-siRNAs (>70% suppression) significantly inhibited APN cardioprotection determined by cardiac apoptosis, infarct size, and cardiac function. Moreover, PKA-KD virtually abolished the suppressive effect of APN on MI/R-induced NADPH oxidase overexpression and superoxide overproduction and partially inhibited the effect of APN on nitrative protein modification in MI/R heart. Mechanistically, APN significantly inhibited MI/R-induced IKK/IκB phosphorylation and NF-κB activation, which were blocked in PKA-KD heart. Finally, the PKA-mediated antioxidant/antinitrative and cardioprotective effects of APN are intact in AMPK-deficient mice, suggesting that there is no cross talk between AMPK and PKA signaling in APN cardioprotection. Collectively, we demonstrate for the first time that APN inhibits oxidative/nitrative stress during MI/R via PKA-dependent NF-κB inhibition.
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Affiliation(s)
- Yanqing Zhang
- Department of Anesthesiology, Shanxi Medical University, Taiyuan, China
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Sahebkar A. Head-to-head comparison of fibrates versus statins for elevation of circulating adiponectin concentrations: a systematic review and meta-analysis. Metabolism 2013; 62:1876-85. [PMID: 24095632 DOI: 10.1016/j.metabol.2013.08.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Revised: 08/13/2013] [Accepted: 08/27/2013] [Indexed: 01/06/2023]
Abstract
BACKGROUND Elevation of adiponectin levels is a potential therapeutic tool against cardiovascular and metabolic diseases. Clinical evidence suggests differences between fibrates and statins in improving circulating concentrations of adiponectin. AIM To compare the efficacy of fibrates vs. statins on circulating concentrations of adiponectin by meta-analysis of randomized head-to-head trials. METHODS A systematic literature search of Medline was conducted to identify randomized head-to-head comparative trials investigating the efficacy of fibrates vs. statins on circulating levels of adiponectin. Inverse variance-weighted mean differences (WMDs) and 95% confidence intervals (CIs) were calculated for net changes in adiponectin concentrations using a random-effects model. Random-effects meta-regression was performed to assess the effect of putative moderators on adiponectin levels. RESULTS Six trials with a total of 326 subjects (166 in the fibrate and 160 in the statin group) met the eligibility criteria and were selected for this meta-analysis. The estimated effect size for fibrate versus statin therapy was 0.42 μg/mL (95% CI: -0.34-1.17). This effect size was robust in the leave-one-out sensitivity analysis and not sensitive to any single study. Meta-regression indicated a borderline significant association between duration of treatment and the effect of fibrates vs. statins on adiponectin concentrations (slope: -0.20; 95% CI: -0.41-0.01; p=0.06). However, baseline body mass index, glucose and lipid levels did not predict the effect of fibrate vs. statin therapy on circulating adiponectin concentrations (p>0.05). CONCLUSIONS Monotherapy with either fibrates or statins has comparable effects on circulating concentrations of adiponectin. Thus, differential effects of statins and fibrates on the occurrence of cardiovascular events may not be attributed to the corresponding changes in adiponectin levels.
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Affiliation(s)
- Amirhossein Sahebkar
- Biotechnology Research Center, Mashhad University of Medical Sciences, Mashhad 91775-1365, Iran; Cardiovascular Research Center, Mashhad University of Medical Sciences, Mashhad 91775-1365, Iran.
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High-resolution identification of human adiponectin oligomers and regulation by pioglitazone in type 2 diabetic patients. Anal Biochem 2013; 437:150-60. [DOI: 10.1016/j.ab.2013.02.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Revised: 02/03/2013] [Accepted: 02/07/2013] [Indexed: 11/24/2022]
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Wang H, Ducommun S, Quan C, Xie B, Li M, Wasserman D, Sakamoto K, Mackintosh C, Chen S. AS160 deficiency causes whole-body insulin resistance via composite effects in multiple tissues. Biochem J 2013; 449:479-89. [PMID: 23078342 PMCID: PMC3685216 DOI: 10.1042/bj20120702] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Revised: 10/02/2012] [Accepted: 10/19/2012] [Indexed: 11/17/2022]
Abstract
AS160 (Akt substrate of 160 kDa) is a Rab GTPase-activating protein implicated in insulin control of GLUT4 (glucose transporter 4) trafficking. In humans, a truncation mutation (R363X) in one allele of AS160 decreased the expression of the protein and caused severe postprandial hyperinsulinaemia during puberty. To complement the limited studies possible in humans, we generated an AS160-knockout mouse. In wild-type mice, AS160 expression is relatively high in adipose tissue and soleus muscle, low in EDL (extensor digitorum longus) muscle and detectable in liver only after enrichment. Despite having lower blood glucose levels under both fasted and random-fed conditions, the AS160-knockout mice exhibited insulin resistance in both muscle and liver in a euglycaemic clamp study. Consistent with this paradoxical phenotype, basal glucose uptake was higher in AS160-knockout primary adipocytes and normal in isolated soleus muscle, but their insulin-stimulated glucose uptake and overall GLUT4 levels were markedly decreased. In contrast, insulin-stimulated glucose uptake and GLUT4 levels were normal in EDL muscle. The liver also contributes to the AS160-knockout phenotype via hepatic insulin resistance, elevated hepatic expression of phosphoenolpyruvate carboxykinase isoforms and pyruvate intolerance, which are indicative of increased gluconeogenesis. Overall, as well as its catalytic function, AS160 influences expression of other proteins, and its loss deregulates basal and insulin-regulated glucose homoeostasis, not only in tissues that normally express AS160, but also by influencing liver function.
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Key Words
- akt substrate of 160 kda (as160)
- glucose transport
- insulin resistance
- liver
- muscle
- as160, akt substrate of 160 kda
- edl, extensor digitorum longus
- fbp-1, fructose-1,6-bisphosphatase 1
- gap, gtpase-activating protein
- gapdh, glyceraldehyde-3-phosphate dehydrogenase
- gir, glucose infusion rate
- glut, glucose transporter
- gsk3, glycogen synthase kinase 3
- mbp, myelin basic protein
- pck/pepck, phosphoenolpyruvate carboxykinase
- pkb, protein kinase b
- pm, plasma membrane
- rer, respiratory exchange ratio
- ta, tibialis anterior
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Affiliation(s)
- Hong Yu Wang
- *MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Nanjing University, Pukou District, Nanjing 210061, China
| | - Serge Ducommun
- †MRC Protein Phosphorylation Unit, College of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, U.K
- ‡Nestlé Institute of Health Sciences SA, Campus EPFL, Quartier de l'Innovation, Bâtiment G, 1015 Lausanne, Switzerland
| | - Chao Quan
- *MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Nanjing University, Pukou District, Nanjing 210061, China
| | - Bingxian Xie
- *MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Nanjing University, Pukou District, Nanjing 210061, China
| | - Min Li
- *MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Nanjing University, Pukou District, Nanjing 210061, China
| | - David H. Wasserman
- §Department of Molecular Physiology and Biophysics, Vanderbilt University, School of Medicine, 2200 Pierce Ave, Nashville, TN 37232, U.S.A
| | - Kei Sakamoto
- †MRC Protein Phosphorylation Unit, College of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, U.K
- ‡Nestlé Institute of Health Sciences SA, Campus EPFL, Quartier de l'Innovation, Bâtiment G, 1015 Lausanne, Switzerland
| | - Carol Mackintosh
- †MRC Protein Phosphorylation Unit, College of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, U.K
- ‖Division of Cell and Developmental Biology, College of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, U.K
| | - Shuai Chen
- *MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Nanjing University, Pukou District, Nanjing 210061, China
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Li Y, Ding L, Hassan W, Abdelkader D, Shang J. Adipokines and hepatic insulin resistance. J Diabetes Res 2013; 2013:170532. [PMID: 23762871 PMCID: PMC3670576 DOI: 10.1155/2013/170532] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Accepted: 04/24/2013] [Indexed: 01/25/2023] Open
Abstract
Obesity is a major risk factor for insulin resistance and type 2 diabetes. Adipose tissue is now considered to be an active endocrine organ that secretes various adipokines such as adiponectin, leptin, resistin, tumour necrosis factor-α, and interleukin-6. Recent studies have shown that these factors might provide a molecular link between increased adiposity and impaired insulin sensitivity. Since hepatic insulin resistance plays the key role in the whole body insulin resistance, clarification of the regulatory processes about hepatic insulin resistance by adipokines in rodents and human would seem essential in order to understand the mechanism of type 2 diabetes and for developing novel therapeutic strategies to treat it.
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Affiliation(s)
- Yu Li
- National Center for Drug Screening and State Key Laboratory of Natural Medicines, China Pharmaceutical University, Jiangsu Province 210009, China
| | - Lin Ding
- National Center for Drug Screening and State Key Laboratory of Natural Medicines, China Pharmaceutical University, Jiangsu Province 210009, China
| | - Waseem Hassan
- National Center for Drug Screening and State Key Laboratory of Natural Medicines, China Pharmaceutical University, Jiangsu Province 210009, China
- Department of Pharmacy, Bahauddin Zakariya University, Multan 60800, Pakistan
| | - Daoud Abdelkader
- National Center for Drug Screening and State Key Laboratory of Natural Medicines, China Pharmaceutical University, Jiangsu Province 210009, China
| | - Jing Shang
- National Center for Drug Screening and State Key Laboratory of Natural Medicines, China Pharmaceutical University, Jiangsu Province 210009, China
- *Jing Shang:
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Brockman DA, Chen X, Gallaher DD. Consumption of a high β-glucan barley flour improves glucose control and fatty liver and increases muscle acylcarnitines in the Zucker diabetic fatty rat. Eur J Nutr 2012. [PMID: 23229409 DOI: 10.1007/s00394‐012‐0478‐2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
PURPOSE The soluble fiber β-glucan, a natural component of barley, has been shown to lower the postprandial glucose response and is thought to improve insulin resistance. METHODS This study examined the effect of chronic consumption of the high β-glucan barley flour on glucose control, liver lipids and markers of muscle fatty acid oxidation in the Zucker diabetic fatty (ZDF) rat. Two groups of ZDF rats were fed diets containing either 6% β-glucan in the form of barley flour or cellulose as a control for 6 weeks. A group of Zucker lean rats served as a negative control. RESULTS The barley flour group had an increased small intestinal contents viscosity compared to the obese control group. After 6 weeks, the barley flour group had reduced glycated hemoglobin, lower relative kidney weights and a reduced area under the curve during a glucose tolerance test, indicating improved glucose control. Fasting plasma adiponectin levels increased in the barley flour group and were not different than the lean control group. ZDF rats on the barley flour diet had lower relative epididymal fat pad weights than the obese control and a greater food efficiency ratio. The barley flour group also had reduced liver weights and a decreased concentration of liver lipids. The barley flour group had significantly higher concentrations of muscle acylcarnitines, a metabolite generated during fatty acid oxidation. CONCLUSION These results show that chronic consumption of β-glucans can improve glucose control and decrease fatty liver in a model of diabetes with obesity.
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Affiliation(s)
- David A Brockman
- Department of Food Science and Nutrition, University of Minnesota-Twin Cities, 1334 Eckles Avenue, St. Paul, MN, 55108-1038, USA
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Consumption of a high β-glucan barley flour improves glucose control and fatty liver and increases muscle acylcarnitines in the Zucker diabetic fatty rat. Eur J Nutr 2012; 52:1743-53. [PMID: 23229409 DOI: 10.1007/s00394-012-0478-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2012] [Accepted: 11/27/2012] [Indexed: 01/21/2023]
Abstract
PURPOSE The soluble fiber β-glucan, a natural component of barley, has been shown to lower the postprandial glucose response and is thought to improve insulin resistance. METHODS This study examined the effect of chronic consumption of the high β-glucan barley flour on glucose control, liver lipids and markers of muscle fatty acid oxidation in the Zucker diabetic fatty (ZDF) rat. Two groups of ZDF rats were fed diets containing either 6% β-glucan in the form of barley flour or cellulose as a control for 6 weeks. A group of Zucker lean rats served as a negative control. RESULTS The barley flour group had an increased small intestinal contents viscosity compared to the obese control group. After 6 weeks, the barley flour group had reduced glycated hemoglobin, lower relative kidney weights and a reduced area under the curve during a glucose tolerance test, indicating improved glucose control. Fasting plasma adiponectin levels increased in the barley flour group and were not different than the lean control group. ZDF rats on the barley flour diet had lower relative epididymal fat pad weights than the obese control and a greater food efficiency ratio. The barley flour group also had reduced liver weights and a decreased concentration of liver lipids. The barley flour group had significantly higher concentrations of muscle acylcarnitines, a metabolite generated during fatty acid oxidation. CONCLUSION These results show that chronic consumption of β-glucans can improve glucose control and decrease fatty liver in a model of diabetes with obesity.
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Brockman DA, Chen X, Gallaher DD. Hydroxypropyl methylcellulose, a viscous soluble fiber, reduces insulin resistance and decreases fatty liver in Zucker Diabetic Fatty rats. Nutr Metab (Lond) 2012; 9:100. [PMID: 23146593 PMCID: PMC3565887 DOI: 10.1186/1743-7075-9-100] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Accepted: 11/05/2012] [Indexed: 12/13/2022] Open
Abstract
Background Diets producing a high glycemic response result in exaggerated insulin secretion which induces hepatic lipogenesis, contributing to development of insulin resistance and fatty liver. Viscous dietary fibers blunt the postprandial rise in blood glucose, however their effect on type 2 diabetes and obesity are not entirely known. This study examined the effect of chronic consumption of the viscous, non-fermentable dietary fiber, hydroxypropyl methylcellulose (HPMC), on glucose control, insulin resistance and liver lipids in an obese diabetic rat model. Methods Three groups of Zucker Diabetic Fatty (ZDF) rats were fed diets containing either 5% non-viscous cellulose (control), low viscosity HPMC (LV-HPMC) or high viscosity HPMC (HV- HPMC) for six weeks. Zucker lean littermates consuming cellulose served as a negative control. Markers of glucose control, including oral glucose tolerance test, glycated hemoglobin and urinary glucose, were measured as well as adiposity and the accumulation of liver lipids. Results The HPMC diets increased the viscosity of the small intestinal contents and reduced the postprandial rise in blood glucose. The food efficiency ratio was greater with HPMC feeding compared to the obese control and urinary excretion of glucose and ketone bodies was reduced. The two HPMC groups had lower glycated hemoglobin and kidney weights and a reduced area under the curve during a glucose tolerance test, indicating improved glucose control. Epididymal fat pad weight as percent of body weight was reduced in the HV-HPMC group compared to the obese control group. The HV-HPMC group also had lower concentrations of liver lipid and cholesterol and reduced liver weight. However, HV-HPMC feeding did not affect hepatic gene expression of SREBP-1c or FAS. Muscle concentration of acylcarnitines, a lipid intermediate in fatty acid β-oxidation, was not different between the HPMC groups and obese control, suggesting no change in muscle fatty acid oxidation by HPMC. Conclusions Consumption of the viscous non-fermentable fiber HPMC decreased diabetic wasting, improved glucose control and reduced insulin resistance and fatty liver in a model of obesity with diabetes.
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Affiliation(s)
- David A Brockman
- Department of Food Science and Nutrition, University of Minnesota-Twin Cities, 1334 Eckles Avenue, St, Paul, MN 55108-1038, USA.
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Gunawardana SC. Therapeutic value of brown adipose tissue: Correcting metabolic disease through generating healthy fat. Adipocyte 2012; 1:250-255. [PMID: 23700541 PMCID: PMC3609108 DOI: 10.4161/adip.21042] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Brown adipose tissue (BAT), an important endocrine organ long known for thermogenesis and energy consumption, has received much attention in recent years for its potential to combat obesity. In general, BAT can enhance metabolism and improve overall health. Our recent work demonstrates the ability of embryonic BAT transplants to correct type 1 diabetes (T1D) without insulin, via mechanisms somewhat different from those involved in BAT-associated weight loss. BAT transplants seem to reverse T1D by decreasing inflammation and increasing functionality in the surrounding white adipose tissue (WAT), thereby enabling it to secrete hypoglycemic adipokines, which compensate for the function of insulin. Thus BAT can transform unhealthy WAT to a healthy status, sufficient to replace the function of endocrine pancreas and establish insulin-independent glycemic regulation. Several studies, including ours, demonstrate the remarkable ability of BAT to correct metabolic disorders and hint at its beneficial effects on inflammation. Hence, addition of more BAT to the body, through transplantation or stimulating regeneration, may well be the therapy of the future for the simple correction of numerous diseases.
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Bastard JP, Fève B. The secretory face of the adipose cell: A tribute to two queens, leptin and adiponectin. Biochimie 2012; 94:2063-4. [DOI: 10.1016/j.biochi.2012.06.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Accepted: 06/25/2012] [Indexed: 12/23/2022]
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Abstract
Type 1 diabetes (T1D) is a serious disease with increasing incidence worldwide, with fatal consequences if untreated. Traditional therapies require direct or indirect insulin replacement, which involves numerous limitations and complications. While insulin is the major regulator of blood glucose, recent reports demonstrate the ability of several extra-pancreatic hormones to decrease blood glucose and improve metabolic homeostasis. Such hormones mainly include adipokines originating from adipose tissue (AT), while specific factors from the gut and liver also contribute to glucose homeostasis. Correction of T1D with adipokines is progressively becoming a realistic option, with the potential to overcome many problems associated with insulin replacement. Several recent studies demonstrate insulin-independent reversal or amelioration of T1D through administration of specific adipokines. Our recent work demonstrates the ability of healthy AT to compensate for the function of endocrine pancreas in long-term correction of T1D. This review discusses the potential of AT-related therapies for T1D as viable alternatives to insulin replacement.
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Affiliation(s)
- Subhadra C Gunawardana
- Department of Molecular Physiology and Biophysics, Vanderbilt University Medical Center, Nashville, TN 37232, USA.
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