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Uryash A, Umlas J, Mijares A, Adams JA, Lopez JR. Enhancing Muscle Intracellular Ca 2+ Homeostasis and Glucose Uptake: Passive Pulsatile Shear Stress Treatment in Type 2 Diabetes. Biomedicines 2023; 11:2596. [PMID: 37892970 PMCID: PMC10604129 DOI: 10.3390/biomedicines11102596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 09/19/2023] [Accepted: 09/19/2023] [Indexed: 10/29/2023] Open
Abstract
Type 2 diabetes mellitus (T2D) is a significant global public health problem that has seen a substantial increase in the number of affected individuals in recent decades. In a murine model of T2D (db/db), we found several abnormalities, including aberrant intracellular calcium concentration ([Ca2+]i), decreased glucose transport, increased production of reactive oxygen species (ROS), elevated levels of pro-inflammatory interleukins and creatine phosphokinase (CK), and muscle weakness. Previously, we demonstrated that passive pulsatile shear stress, generated by sinusoidal (headward-forward) motion, using a motion platform that provides periodic acceleration of the whole body in the Z plane (pGz), induces the synthesis of nitric oxide (NO) mediated by constitutive nitric oxide synthase (eNOS and nNOS). We investigated the effect of pGz on db/db a rodent model of T2D. The treatment of db/db mice with pGz resulted in several beneficial effects. It reduced [Ca2+]i overload; enhanced muscle glucose transport; and decreased ROS levels, interleukins, and CK. Furthermore, pGz treatment increased the expression of endothelial nitric oxide synthase (eNOS), phosphorylated eNOS (p-eNOS), and neuronal nitric oxide synthase (nNOS); reduced inducible nitric oxide synthase (iNOS); and improved muscle strength. The cytoprotective effects of pGz appear to be mediated by NO, since pretreatment with L-NAME, a nonspecific NOS inhibitor, abolished the effects of pGz on [Ca2+]i and ROS production. Our findings suggest that a non-pharmacological strategy such as pGz has therapeutic potential as an adjunct treatment to T2D.
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Affiliation(s)
- Arkady Uryash
- Division of Neonatology, Mount Sinai Medical Center, Miami, FL 33140, USA; (A.U.); (J.A.A.)
| | - Jordan Umlas
- Division of Neonatology, Mount Sinai Medical Center, Miami, FL 33140, USA; (A.U.); (J.A.A.)
| | - Alfredo Mijares
- Centro de Biofísica y Bioquímica, Instituto Venezolano de Investigaciones Científicas, Caracas 21827, Venezuela;
| | - Jose A. Adams
- Division of Neonatology, Mount Sinai Medical Center, Miami, FL 33140, USA; (A.U.); (J.A.A.)
| | - Jose R. Lopez
- Department of Research, Mount Sinai Medical Center, Miami Beach, FL 33140, USA
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AlSabagh AT, Rao MS, Renno WM. The impact of heat therapy on neuromuscular function and muscle atrophy in diabetic rats. Front Physiol 2023; 13:1039588. [PMID: 36685197 PMCID: PMC9849254 DOI: 10.3389/fphys.2022.1039588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 12/05/2022] [Indexed: 01/06/2023] Open
Abstract
Introduction: Diabetes Mellitus (DM) is the most common metabolic disease worldwide and is associated with many systemic complications. Muscle atrophy is one of the significant complications in DM patients, making routine tasks laborious as atrophy continues. It is known that heat stress stimulates heat shock proteins and other proteins that maintain muscle mass; however, it is not thoroughly studied in diabetic conditions. This study addressed whether heat therapy can attenuate muscle atrophy in STZ-induced diabetic rats and explored its mechanism of action on specific muscle proteins. Methods: Male Sprague Dawley rats were randomly divided into short-term (3 weeks) and long-term (6 weeks) experiments. In each experiment rats were divided into control, heat therapy, diabetic and diabetic + heat therapy groups. Rats in heat therapy groups were exposed to heat therapy for 30 min daily for three or six weeks in a temperature-controlled (42°C) chamber. Results: The attenuation of neuromuscular functions assessed by Rotarod, Kondziella's inverted screen, and extensor postural thrust tests showed that diabetic rats exposed to heat therapy performed significantly better than diabetic controls. Muscle cross sectional area data established that heat therapy reduced muscle atrophy by 34.3% within 3 weeks and 44.1% within 6 weeks in the diabetic groups. Further, heat therapy significantly decreased muscle atrophy markers (CD68, KLF, and MAFbx) and significantly elevated muscle hypertrophy markers (AKT, mTOR, and HSP70). Conclusions: This study shows the relevance and clinical significance of utilizing heat therapy as a viable treatment to attenuate muscle atrophy in diabetic patients.
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Mosaad YO, Hussein MA, Ateyya H, Mohamed AH, Ali AA, Ramadan Youssuf A, Wink M, El-Kholy AA. Vanin 1 Gene Role in Modulation of iNOS/MCP-1/TGF-β1 Signaling Pathway in Obese Diabetic Patients. J Inflamm Res 2022; 15:6745-6759. [PMID: 36540060 PMCID: PMC9760040 DOI: 10.2147/jir.s386506] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 11/23/2022] [Indexed: 01/15/2024] Open
Abstract
INTRODUCTION Cysteamine, a powerful endogenous antioxidant, is produced mostly by the vanin-1 with pantetheinase activity. With regard to glycemic, inflammatory, and redox factors, the current study sought to evaluate the association between the expression of the vanin-1 gene, oxidative stress, and inflammatory and iNOS signaling pathway in obese diabetic patients. METHODS We enrolled 67 male subjects with an average age of 53.5 ± 5.0 years, divided into 4 groups according to the WHO guideline. We determined their plasma levels of glucose, insulin, IRI, HbA1c, TC, TG, HDL-C, TNF- α, MCP-1, TGF-β1, SOD, CAT, and TBARs, as well as expression of the iNOS and Vanin1 genes. RESULTS Overweight and obese class I and II diabetics had significantly higher levels of plasma glucose, insulin, HbA1c, TNF-α, MCP-1, TGF-β1, CAT, and TBAR as well as iNOS and vanin-1 gene expression compared to healthy control individuals. In addition, as compared to healthy control individuals, overweight obese class I and II diabetics' plasma HDL-C levels and blood SOD activity were significantly lower. In addition, ultrasound and computed tomography showed that the presence of a mild obscuring fatty liver with mild hepatic echogenicity appeared in overweight, class I and II obese diabetic patients. CONCLUSION These findings provide important information for understanding the correlation between Vanin 1 and glycemic, inflammatory, and redox factors in obese patients. Furthermore, US and CT analysis were performed to visualize the observed images of fatty liver due to obesity.
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Affiliation(s)
- Yasser O Mosaad
- Department of Pharmacy, Practice & Clinical Pharmacy, Faculty of Pharmacy, Future University, Cairo, Egypt
| | - Mohammed Abdalla Hussein
- Department of Biotechnology, Faculty of Applied Health Science, October 6th University, October 6th City, Egypt
| | - Hayam Ateyya
- Department of Medical Pharmacology, Faculty of Medicine, Cairo University, Cairo, Egypt
- Department of Pharmacy Practice and Clinical Pharmacy, Faculty of Pharmacy, Future University, Cairo, Egypt
| | - Ahmed H Mohamed
- Department of Radiology and Medical Imaging, Faculty of Applied Health Science Technology, October 6th University, October 6th City, Egypt
| | - Ali A Ali
- Food Sciences Department, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
| | - Alaa Ramadan Youssuf
- Consultant and Head of Cardiology Department, AL-AHRAR Teaching Hospital, Zagazig University, Zagazig, Egypt
| | - Michael Wink
- Heidelberg University, Institute of Pharmacy and Molecular Biotechnology, Heidelberg, Germany
| | - Amal A El-Kholy
- Department of Clinical Pharmacy, Faculty of Pharmacy, Ain-Shams University, Cairo, Egypt
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Kim JH, Cha HN, Kim YW, Park SY. Peroxiredoxin 2 deficiency does not affect insulin resistance and oxidative stress in high-fat diet-fed obese mice. Arch Physiol Biochem 2022; 128:859-868. [PMID: 32141337 DOI: 10.1080/13813455.2020.1733026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
OBJECTIVE To examine if peroxiredoxin 2 (Prx2) deficiency aggravates high-fat diet-induced insulin resistance. MATERIAL AND METHODS Insulin sensitivity was measured in Prx2 knockout (KO) and wild-type (WT) littermates using the hyperinsulinemic-euglycemic clamp. RESULTS Whole body glucose turnover, glucose uptake, and levels of glucose transporter 4 (Glut4) protein in the skeletal muscle were found to be lower. This was followed by increased expression of oxidative stress markers in Prx2 KO mice than that in WT mice in the control diet group. Although, a 12-week high-fat diet induced insulin resistance and enhanced oxidative stress in both genotypes, there was no difference between WT and Prx2 KO mice with respect to insulin sensitivity and the level of oxidative stress markers. Accordingly, the levels of phosphorylated Akt and Glut4 were similar between the two genotypes. CONCLUSION These results suggest that Prx2 does not affect high-fat diet-induced oxidative stress and insulin resistance in mice.
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Affiliation(s)
- Jae-Ho Kim
- Department of Urology, Soon Chun Hyung University Hospital, Gumi, Korea
- Department of Physiology, College of Medicine, Yeungnam University, Daegu, Korea
| | - Hye-Na Cha
- Department of Physiology, College of Medicine, Yeungnam University, Daegu, Korea
- Smart-aging Convergence Research Center, College of Medicine, Yeungnam University, Daegu, Korea
| | - Yong-Woon Kim
- Department of Physiology, College of Medicine, Yeungnam University, Daegu, Korea
| | - So-Young Park
- Department of Physiology, College of Medicine, Yeungnam University, Daegu, Korea
- Smart-aging Convergence Research Center, College of Medicine, Yeungnam University, Daegu, Korea
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Vafaei-Nezhad S, Niknazar S, Payvandi AA, Shirazi Tehrani A, Ahmady Roozbahany N, Ahrabi B, Abbaszadeh HA, Darabi S. Therapeutic Effects of Photobiomodulation Therapy on Multiple Sclerosis by Regulating the Inflammatory Process and Controlling Immune Cell Activity: A Novel Promising Treatment Target. J Lasers Med Sci 2022; 13:e32. [PMID: 36743142 PMCID: PMC9841388 DOI: 10.34172/jlms.2022.32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 06/25/2022] [Indexed: 11/22/2022]
Abstract
Introduction: Multiple sclerosis (MS) is one of the autoimmune and chronic diseases of the central nervous system; this disease occurs more frequently in young people and women and leads to neurological symptoms. Oxidative stress, inflammatory processes, and oligodendrocyte dysfunction have a pivotal role in the pathophysiology of this disease. Nowadays it is reported that photobiomodulation (PBM) as a non-invasive treatment has neuroprotective potential, but the exact mechanisms are not understood. Methods: In this study, we reviewed the effects of PBM on MS. In this regard, we used the keywords "Photobiomodulation", "Laser therapy", and "Low-level laser therapy" on MS to find related studies on this subject in PubMed, Google scholar, Elsevier, Medline, and Scopus databases. Results: PBM has positive effects on MS by regulating the inflammatory process, controlling immune cell activity and mitochondrial functions, as well as inhibiting free radicals production which finally leads to a reduction in neurological defects and an improvement in the functional status of patients. Conclusion: Overall, researchers have suggested the use of laser therapy in neurodegenerative diseases due to its numerous therapeutic effects.
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Affiliation(s)
- Saeed Vafaei-Nezhad
- Department of Anatomical Sciences, School of Medicine, Cellular and Molecular Research Center, Birjand University of Medical Sciences, Birjand, Iran,Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Somayeh Niknazar
- Functional Neurosurgery Research Center, Shohada Tajrish Comprehensive Neurosurgical Center of Excellence, Shahid Beheshti University of Medical Sciences, Tehran, Iran,Hearing Disorders Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ali Asghar Payvandi
- Hearing Disorders Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Atefeh Shirazi Tehrani
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Navid Ahmady Roozbahany
- Hearing Disorders Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Behnaz Ahrabi
- Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran,Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hojjat Allah Abbaszadeh
- Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran,Hearing Disorders Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran,Correspondence to Hojjat Allah Abbaszadeh, Hearing Disorders Research Center, Loghman Hakim Hospital;
; Shahram Darabi, Cellular and Molecular Research Center, Research Institute for NonCommunicable Diseases, Qazvin University of Medical Sciences, Qazvin, Iran;
| | - Shahram Darabi
- Cellular and Molecular Research Center, Research Institute for Non-Communicable Diseases, Qazvin University of Medical Sciences, Qazvin, Iran,Correspondence to Hojjat Allah Abbaszadeh, Hearing Disorders Research Center, Loghman Hakim Hospital;
; Shahram Darabi, Cellular and Molecular Research Center, Research Institute for NonCommunicable Diseases, Qazvin University of Medical Sciences, Qazvin, Iran;
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Vilela VR, Samson N, Nachbar R, Perazza LR, Lachance G, Rokatoarivelo V, Centano-Baez C, Zancan P, Sola-Penna M, Bellmann K, Di Marzo V, Laplante M, Marette A. Adipocyte-specific Nos2 deletion improves insulin resistance and dyslipidemia through brown fat activation in diet-induced obese mice. Mol Metab 2022; 57:101437. [PMID: 35033724 PMCID: PMC8802131 DOI: 10.1016/j.molmet.2022.101437] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 12/22/2021] [Accepted: 01/03/2022] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVE Inducible nitric oxide (NO) synthase (NOS2) is a well documented inflammatory mediator of insulin resistance in obesity. NOS2 expression is induced in both adipocytes and macrophages within adipose tissue during high-fat (HF)-induced obesity. METHODS Eight week old male mice with adipocyte selective deletion of the Nos2 gene (Nos2AD-KO) and their wildtype littermates (Nos2fl/fl) were subjected to chow or high-fat high-sucrose (HFHS) diet for 10 weeks followed by metabolic phenotyping and determination of brown adipose tissue (BAT) thermogenesis. The direct impact of NO on BAT mitochondrial respiration was also assessed in brown adipocytes. RESULTS Here, we show that HFHS-fed Nos2AD-KO mice had improved insulin sensitivity as compared to Nos2fl/fl littermates. Nos2AD-KO mice were also protected from HF-induced dyslipidemia and exhibited increased energy expenditure compared to Nos2fl/fl mice. This was linked to activation of BAT in HFHS-fed Nos2AD-KO mice as shown by increased Ucp1 and Ucp2 gene expression and augmented respiratory capacity of BAT mitochondria. Furthermore, mitochondrial respiration was inhibited by NO, or upon cytokine-induced NOS2 activation, but improved by NOS2 inhibition in brown adipocytes. CONCLUSIONS These results demonstrate a key role for adipocyte NOS2 in the development of obesity-linked insulin resistance and dyslipidemia, partly through NO dependent inhibition of BAT mitochondrial bioenergetics.
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Affiliation(s)
| | - Nolwenn Samson
- Quebec Heart & Lung Institute, Université Laval, 2725 Ch Ste-Foy, Québec, QC, G1V 4G5, Canada
| | - Renato Nachbar
- Quebec Heart & Lung Institute, Université Laval, 2725 Ch Ste-Foy, Québec, QC, G1V 4G5, Canada
| | - Lia Rossi Perazza
- Quebec Heart & Lung Institute, Université Laval, 2725 Ch Ste-Foy, Québec, QC, G1V 4G5, Canada
| | - Gabriel Lachance
- Quebec Heart & Lung Institute, Université Laval, 2725 Ch Ste-Foy, Québec, QC, G1V 4G5, Canada
| | - Volatiana Rokatoarivelo
- Quebec Heart & Lung Institute, Université Laval, 2725 Ch Ste-Foy, Québec, QC, G1V 4G5, Canada
| | - Carolina Centano-Baez
- Quebec Heart & Lung Institute, Université Laval, 2725 Ch Ste-Foy, Québec, QC, G1V 4G5, Canada
| | - Patricia Zancan
- Quebec Heart & Lung Institute, Université Laval, 2725 Ch Ste-Foy, Québec, QC, G1V 4G5, Canada
| | - Mauro Sola-Penna
- Quebec Heart & Lung Institute, Université Laval, 2725 Ch Ste-Foy, Québec, QC, G1V 4G5, Canada
| | - Kerstin Bellmann
- Quebec Heart & Lung Institute, Université Laval, 2725 Ch Ste-Foy, Québec, QC, G1V 4G5, Canada
| | - Vincenzo Di Marzo
- Quebec Heart & Lung Institute, Université Laval, 2725 Ch Ste-Foy, Québec, QC, G1V 4G5, Canada; Institute of Nutrition and Functional Foods, Centre NUTRISS, Université Laval, 2440 Boulevard Hochelaga Suite 1710, Québec, QC, G1V 0A6, Canada; Canada Excellence Research Chair Microbiome-Endocannabinoidome Axis in Metabolic Health (CERC-MEND)
| | - Mathieu Laplante
- Quebec Heart & Lung Institute, Université Laval, 2725 Ch Ste-Foy, Québec, QC, G1V 4G5, Canada
| | - André Marette
- Quebec Heart & Lung Institute, Université Laval, 2725 Ch Ste-Foy, Québec, QC, G1V 4G5, Canada; Institute of Nutrition and Functional Foods, Centre NUTRISS, Université Laval, 2440 Boulevard Hochelaga Suite 1710, Québec, QC, G1V 0A6, Canada.
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Hossein-khannazer N, Kazem Arki M, Keramatinia A, Rezaei-Tavirani M. The Role of Low-Level Laser Therapy in the Treatment of Multiple Sclerosis: A Review Study. J Lasers Med Sci 2021; 12:e88. [PMID: 35155173 PMCID: PMC8837843 DOI: 10.34172/jlms.2021.88] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 12/25/2021] [Indexed: 11/12/2023]
Abstract
Introduction: Multiple sclerosis (MS) is an autoimmune disease. Inflammatory cells, cytokines and chemokines play a major role in the pathogenesis of the disease. Low-level laser therapy (LLLT) as a photobiostimulation approach could affect a wide range of cellular responses. LLLT inhibits the inflammatory signaling pathway, improves cell viability, inhibits apoptosis, modulates immune responses and induces the production of growth factors. Methods: In this review, we discuss the effect of LLLT on cellular responses and its application in the treatment of MS. Such keywords as "low-level laser therapy", "photobiomodulation" and "multiple sclerosis" were used to find studies related to laser therapy in MS in Google scholar, PubMed and Medline databases. Results: LLLT reduced the inflammatory immune cells and mediators. It also enhanced the regeneration of neurons. Conclusion: Investigations showed that besides current treatment strategies, LLLT could be a promising therapeutic approach for the treatment of MS.
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Affiliation(s)
- Nikoo Hossein-khannazer
- Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mandana Kazem Arki
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Aliasghar Keramatinia
- Department of Social Medicine, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Cancer Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mostafa Rezaei-Tavirani
- Proteomics Research Center, Faculty of Paramedical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Youssef AM, Mohamed DA, Hussein S, Abdullah DM, Abdelrahman SA. Effects of Quercetin and Coenzyme Q10 on Biochemical, Molecular, and Morphological Parameters of Skeletal Muscle in Trained Diabetic Rats. Curr Mol Pharmacol 2021; 15:239-251. [PMID: 34061009 DOI: 10.2174/1874467214666210521170339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 01/28/2021] [Accepted: 01/29/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Diabetes mellitus (DM) affects the musculoskeletal system through its metabolic perturbations. Exercise modulates blood sugar levels and increases the body's sensitivity to insulin in patients with DM. OBJECTIVE This study aimed to investigate the potential effects of combined quercetin and coenzyme Q10 (CoQ10) supplements with or without exercise on the histological, biochemical and molecular structures of diabetic rat's skeletal muscle. METHOD A total of 64 adult male albino rats were divided into six groups: control, trained nondiabetic, non-trained diabetic, diabetic rats treated with combined CoQ10 and quercetin, diabetic rats with treadmill training, and diabetic rats treated with treadmill training and CoQ10 and quercetin. Blood and skeletal muscle samples were obtained from all groups for routine histological examination and biochemical determination of cytokine levels and protein activities. Quantitative real-time polymerase chain reaction (qRT-PCR) and morphometric analysis of PAS and Bax expressions were also performed. RESULTS Biochemical analysis revealed improvement in all studied parameters with combined CoQ10 and quercetin than exercise training alone. Combined treatment and exercise showed significant improvement in all parameters especially interleukin 6 and malondialdehyde. Fibronectin type III domain-containing protein 5 (FNDC5) expression and irisin levels increased in all trained groups but combined treatment with exercise significantly increased their levels than exercise alone. Histological analysis revealed improvement after exercise or combined treatment; however, when exercise was combined with CoQ10 and quercetin, marked improvement was observed. CONCLUSION the combination of CoQ10 and quercetin could be promising in preserving musculoskeletal function in patients with DM concomitantly with physical exercise.
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Affiliation(s)
- Amal M Youssef
- Department of Physiology, Faculty of Medicine, Taibah University, Medinah, Saudi Arabia
| | - Dalia A Mohamed
- Medical Histology and Cell Biology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Samia Hussein
- Medical Biochemistry and Molecular Biology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Doaa M Abdullah
- Pharmacology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Shaimaa A Abdelrahman
- Medical Histology and Cell Biology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
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Park S, Park SY. Can antioxidants be effective therapeutics for type 2 diabetes? Yeungnam Univ J Med 2020; 38:83-94. [PMID: 33028055 PMCID: PMC8016622 DOI: 10.12701/yujm.2020.00563] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 08/31/2020] [Indexed: 12/14/2022] Open
Abstract
The global obesity epidemic and the growing elderly population largely contribute to the increasing incidence of type 2 diabetes. Insulin resistance acts as a critical link between the present obesity pandemic and type 2 diabetes. Naturally occurring reactive oxygen species (ROS) regulate intracellular signaling and are kept in balance by the antioxidant system. However, the imbalance between ROS production and antioxidant capacity causes ROS accumulation and induces oxidative stress. Oxidative stress interrupts insulin-mediated intracellular signaling pathways, as supported by studies involving genetic modification of antioxidant enzymes in experimental rodents. In addition, a close association between oxidative stress and insulin resistance has been reported in numerous human studies. However, the controversial results with the use of antioxidants in type 2 diabetes raise the question of whether oxidative stress plays a critical role in insulin resistance. In this review article, we discuss the relevance of oxidative stress to insulin resistance based on genetically modified animal models and human trials.
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Affiliation(s)
- Soyoung Park
- Department of Physiology and Smart-aging Convergence Research Center, Yeungnam University College of Medicine, Daegu, Korea
| | - So-Young Park
- Department of Physiology and Smart-aging Convergence Research Center, Yeungnam University College of Medicine, Daegu, Korea
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Stožer A, Vodopivc P, Križančić Bombek L. Pathophysiology of exercise-induced muscle damage and its structural, functional, metabolic, and clinical consequences. Physiol Res 2020; 69:565-598. [PMID: 32672048 DOI: 10.33549/physiolres.934371] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Extreme or unaccustomed eccentric exercise can cause exercise-induced muscle damage, characterized by structural changes involving sarcomere, cytoskeletal, and membrane damage, with an increased permeability of sarcolemma for proteins. From a functional point of view, disrupted force transmission, altered calcium homeostasis, disruption of excitation-contraction coupling, as well as metabolic changes bring about loss of strength. Importantly, the trauma also invokes an inflammatory response and clinically presents itself by swelling, decreased range of motion, increased passive tension, soreness, and a transient decrease in insulin sensitivity. While being damaging and influencing heavily the ability to perform repeated bouts of exercise, changes produced by exercise-induced muscle damage seem to play a crucial role in myofibrillar adaptation. Additionally, eccentric exercise yields greater hypertrophy than isometric or concentric contractions and requires less in terms of metabolic energy and cardiovascular stress, making it especially suitable for the elderly and people with chronic diseases. This review focuses on our current knowledge of the mechanisms underlying exercise-induced muscle damage, their dependence on genetic background, as well as their consequences at the structural, functional, metabolic, and clinical level. A comprehensive understanding of these is a prerequisite for proper inclusion of eccentric training in health promotion, rehabilitation, and performance enhancement.
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Affiliation(s)
- A Stožer
- Institute of Physiology, Faculty of Medicine, University of Maribor, Slovenia.
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Jiang T, Yang W, Zhang H, Song Z, Liu T, Lv X. Hydrogen Sulfide Ameliorates Lung Ischemia-Reperfusion Injury Through SIRT1 Signaling Pathway in Type 2 Diabetic Rats. Front Physiol 2020; 11:596. [PMID: 32695008 PMCID: PMC7338566 DOI: 10.3389/fphys.2020.00596] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 05/13/2020] [Indexed: 12/13/2022] Open
Abstract
Lung ischemia-reperfusion (IR) injury remains a significant factor for the early mortality of lung transplantations. Diabetes mellitus (DM) is an independent risk factor for 5-year mortality following lung transplantation. Our previous study showed that DM aggravated lung IR injury and that oxidative stress played a key role in this process. Previously, we demonstrated that hydrogen sulfide (H2S) protected against diabetic lung IR injury by suppressing oxidative damage. This study aimed to examine the mechanism by which H2S affects diabetic lung IR injury. High-fat-diet-fed streptozotocin-induced type 2 diabetic rats were exposed to GYY4137, a slow-releasing H2S donor with or without administration of EX527 (a SIRT1 inhibitor), and then subjected to a surgical model of IR injury of the lung. Lung function, oxidative stress, cell apoptosis, and inflammation were assessed. We found that impairment of lung SIRT1 signaling under type 2 diabetic conditions was further exacerbated by IR injury. GYY4137 treatment markedly activated SIRT1 signaling and ameliorated lung IR injury in type 2 DM animals by improving lung functional recovery, diminishing oxidative damage, reducing inflammation, and suppressing cell apoptosis. However, these effects were largely compromised by EX527. Additionally, treatment with GYY4137 significantly activated the Nrf2/HO-1 antioxidant signaling pathway and increased eNOS phosphorylation. However, these effects were largely abolished by EX527. Together, our results indicate that GYY4137 treatment effectively attenuated lung IR injury under type 2 diabetic conditions via activation of lung SIRT1 signaling. SIRT1 activation upregulated Nrf2/HO-1 and activated the eNOS-mediated antioxidant signaling pathway, thus reducing cell apoptosis and inflammation and eventually preserving lung function.
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Affiliation(s)
- Tao Jiang
- Department of Anesthesiology (Hei Long Jiang Province Key Lab of Research on Anesthesiology and Critical Care Medicine), The Second Affiliated Hospital, Harbin Medical University, Harbin, China
| | - Weiwei Yang
- Department of Pathology, Harbin Medical University, Harbin, China
| | - Hongli Zhang
- Department of Ophthalmology, Daqing Fifth Hospital, Daqing, China
| | - Zhiqiang Song
- Department of Geriatrics, The Second Affiliated Hospital, Harbin Medical University, Harbin, China
| | - Tianhua Liu
- Department of Anesthesiology (Hei Long Jiang Province Key Lab of Research on Anesthesiology and Critical Care Medicine), The Second Affiliated Hospital, Harbin Medical University, Harbin, China
| | - Xiangqi Lv
- Department of Anesthesiology (Hei Long Jiang Province Key Lab of Research on Anesthesiology and Critical Care Medicine), The Second Affiliated Hospital, Harbin Medical University, Harbin, China
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12
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Koka S, Xi L, Kukreja RC. Chronic inhibition of phosphodiesterase 5 with tadalafil affords cardioprotection in a mouse model of metabolic syndrome: role of nitric oxide. Mol Cell Biochem 2020; 468:47-58. [PMID: 32162053 PMCID: PMC10726535 DOI: 10.1007/s11010-020-03710-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 03/04/2020] [Indexed: 01/21/2023]
Abstract
Patients with metabolic syndrome (MetS) often exhibit generalized endothelial and cardiac dysfunction with decreased nitric oxide (NO) production and/or bioavailability. Since phosphodiesterase 5 (PDE5) inhibitors restore NO signaling, we hypothesized that chronic treatment with long-acting PDE5 inhibitor tadalafil may enhance plasma NO levels and reduce cardiac dysfunction following ischemia/reperfusion (I/R) injury in C57BL/6NCrl-Leprdb-lb/Crl mice with MetS phenotypes. Adult male MetS mice were randomized to receive vehicle solvent or tadalafil (1 mg/kg,i.p.) daily for 28 days and C57BL/6NCrl mice served as healthy wild-type controls. After 28 days, cardiac function was assessed by echocardiography and hearts from a subset of mice were isolated and subjected to 30 min of global ischemia followed by 60 min of reperfusion (I/R) in ex vivo Langendorff mode. Body weight, blood lipids, and glucose levels were elevated in MetS mice as compared with wild-type controls. The dyslipidemia in MetS was ameliorated following tadalafil treatment. Although left ventricular (LV) systolic function was minimally altered in the MetS mice, there was a significant diastolic dysfunction as indicated by reduction in the ratio of peak velocity of early to late filling of the mitral inflow, which was significantly improved by tadalafil treatment. Post-ischemic cardiac function, heart rate, and coronary flow decreased significantly in MetS mice compared to wild-type controls, but preserved by tadalafil treatment. Myocardial infarct size was significantly smaller following I/R, which was associated with higher plasma levels of nitrate and nitrite in the tadalafil-treated MetS mice. In conclusion, tadalafil induces significant cardioprotective effects as shown by improvement of LV diastolic function, lipid profile, and reduced infarct size following I/R. Tadalafil treatment enhanced NO production, which may have contributed to the cardioprotective effects.
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Affiliation(s)
- Saisudha Koka
- Pauley Heart Center, Division of Cardiology, Department of Internal Medicine, Virginia Commonwealth University Medical Center, Richmond, VA, 23298-0204, USA
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, University of Houston, Houston, TX, 77204, USA
| | - Lei Xi
- Pauley Heart Center, Division of Cardiology, Department of Internal Medicine, Virginia Commonwealth University Medical Center, Richmond, VA, 23298-0204, USA
| | - Rakesh C Kukreja
- Pauley Heart Center, Division of Cardiology, Department of Internal Medicine, Virginia Commonwealth University Medical Center, Richmond, VA, 23298-0204, USA.
- Division of Cardiology, Virginia Commonwealth University, 1101 East Marshall Street, Room 7-020D, Box 980204, Richmond, VA, 23298-0204, USA.
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13
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Agrimi J, Baroni C, Anakor E, Lionetti V. Perioperative Heart-Brain Axis Protection in Obese Surgical Patients: The Nutrigenomic Approach. Curr Med Chem 2020; 27:258-281. [PMID: 30324875 DOI: 10.2174/0929867325666181015145225] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 08/01/2018] [Accepted: 09/25/2018] [Indexed: 02/06/2023]
Abstract
The number of obese patients undergoing cardiac and noncardiac surgery is rapidly increasing because they are more prone to concomitant diseases, such as diabetes, thrombosis, sleep-disordered breathing, cardiovascular and cerebrovascular disorders. Even if guidelines are already available to manage anesthesia and surgery of obese patients, the assessment of the perioperative morbidity and mortality from heart and brain disorders in morbidly obese surgical patients will be challenging in the next years. The present review will recapitulate the new mechanisms underlying the Heart-brain Axis (HBA) vulnerability during the perioperative period in healthy and morbidly obese patients. Finally, we will describe the nutrigenomics approach, an emerging noninvasive dietary tool, to maintain a healthy body weight and to minimize the HBA propensity to injury in obese individuals undergoing all types of surgery by personalized intake of plant compounds that may regulate the switch from health to disease in an epigenetic manner. Our review provides current insights into the mechanisms underlying HBA response in obese surgical patients and how they are modulated by epigenetically active food constituents.
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Affiliation(s)
- Jacopo Agrimi
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
| | - Carlotta Baroni
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy.,Department of Surgical, Medical and Molecular Pathology and Critical Care Medicine, University of Pisa, Pisa, Italy
| | - Ekene Anakor
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
| | - Vincenzo Lionetti
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy.,UOS Anesthesiology, Fondazione Toscana G. Monasterio, Pisa, Italy
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14
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Bahadoran Z, Mirmiran P, Ghasemi A. Role of Nitric Oxide in Insulin Secretion and Glucose Metabolism. Trends Endocrinol Metab 2020; 31:118-130. [PMID: 31690508 DOI: 10.1016/j.tem.2019.10.001] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Revised: 09/29/2019] [Accepted: 10/03/2019] [Indexed: 01/20/2023]
Abstract
Nitric oxide (NO) contributes to carbohydrate metabolism and decreased NO bioavailability is involved in the development of type 2 diabetes mellitus (T2DM). NO donors may improve insulin signaling and glucose homeostasis in T2DM and insulin resistance (IR), suggesting the potential clinical importance of NO-based interventions. In this review, site-specific roles of the NO synthase (NOS)-NO pathway in carbohydrate metabolism are discussed. In addition, the metabolic effects of physiological low levels of NO produced by constitutive NOS (cNOS) versus pathological high levels of NO produced by inducible NOS (iNOS) in pancreatic β-cells, adipocytes, hepatocytes, and skeletal muscle cells are summarized. A better understanding of the NOS-NO system in the regulation of glucose homeostasis can hopefully facilitate the development of new treatments for T2DM.
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Affiliation(s)
- Zahra Bahadoran
- Nutrition and Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Parvin Mirmiran
- Department of Clinical Nutrition and Human Dietetics, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Asghar Ghasemi
- Endocrine Physiology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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15
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Anavi S, Tirosh O. iNOS as a metabolic enzyme under stress conditions. Free Radic Biol Med 2020; 146:16-35. [PMID: 31672462 DOI: 10.1016/j.freeradbiomed.2019.10.411] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 10/22/2019] [Accepted: 10/23/2019] [Indexed: 12/18/2022]
Abstract
Nitric oxide (NO) is a free radical acting as a cellular signaling molecule in many different biochemical processes. NO is synthesized from l-arginine through the action of the nitric oxide synthase (NOS) family of enzymes, which includes three isoforms: endothelial NOS (eNOS), neuronal NOS (nNOS) and inducible NOS (iNOS). iNOS-derived NO has been associated with the pathogenesis and progression of several diseases, including liver diseases, insulin resistance, obesity and diseases of the cardiovascular system. However, transient NO production can modulate metabolism to survive and cope with stress conditions. Accumulating evidence strongly imply that iNOS-derived NO plays a central role in the regulation of several biochemical pathways and energy metabolism including glucose and lipid metabolism during inflammatory conditions. This review summarizes current evidence for the regulation of glucose and lipid metabolism by iNOS during inflammation, and argues for the role of iNOS as a metabolic enzyme in immune and non-immune cells.
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Affiliation(s)
- Sarit Anavi
- Institute of Biochemistry, Food Science and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Israel; Peres Academic Center, Rehovot, Israel
| | - Oren Tirosh
- Institute of Biochemistry, Food Science and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Israel.
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16
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Ruan D, Liu W, Shi Y, Tan M, Yang L, Wang Z, Zhou Y, Wang R. Protective Effects of Aqueous Extract of Radix Isatidis on Lipopolysaccharide-Induced Sepsis in C57BL/6J Mice. J Med Food 2019; 23:79-89. [PMID: 31765267 DOI: 10.1089/jmf.2019.4476] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Endotoxic shock exhibits a considerably high mortality risk. It is defined as a systemic inflammatory response syndrome caused by a microbial infection. Radix Isatidis has anti-inflammatory, antiviral, and antipyretic effects and is used worldwide. This study investigated the antiendotoxin sepsis effects of an aqueous R. Isatidis extract (RIE) and explored the possible pharmacological molecular mechanisms. Male C57BL/6J mice were intravenously injected with 15 mg/kg lipopolysaccharide (LPS) to induce endotoxic shock. The results demonstrated that the survival rate of mice pretreated with RIE increased, and LPS-induced liver and lung damage were reduced by inhibiting inflammation. For elucidating detailed molecular mechanisms, we focused on LPS-induced transcription factors: nuclear factor-κB (NF-κB) and interferon regulatory factor 3 (IRF3). Our results demonstrated that the protective effects of RIE were strongly dependent on IRF3-induced interferon-β, not on NF-κB-induced tumor necrosis factor-α and interleukin-1β. In addition, RIE suppressed the phosphorylation of IRF3, not NF-κB. In conclusion, this study revealed the antiendotoxic properties of RIE on LPS-induced sepsis and provided mechanistic evidence for the beneficial effects of RIE.
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Affiliation(s)
- Deqing Ruan
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Wenjing Liu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yanhong Shi
- The MOE Key Laboratory for Standardization of Chinese Medicines and The SUTCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Menghui Tan
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Li Yang
- The MOE Key Laboratory for Standardization of Chinese Medicines and The SUTCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Shanghai R&D Centre for Standardization of Chinese Medicines, Shanghai, China
| | - Zhengtao Wang
- The MOE Key Laboratory for Standardization of Chinese Medicines and The SUTCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Shanghai R&D Centre for Standardization of Chinese Medicines, Shanghai, China
| | - Yue Zhou
- The MOE Key Laboratory for Standardization of Chinese Medicines and The SUTCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Rui Wang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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17
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Cha HN, Park S, Dan Y, Kim JR, Park SY. Peroxiredoxin2 Deficiency Aggravates Aging-Induced Insulin Resistance and Declines Muscle Strength. J Gerontol A Biol Sci Med Sci 2019; 74:147-154. [PMID: 29733327 DOI: 10.1093/gerona/gly113] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 05/03/2018] [Indexed: 12/11/2022] Open
Abstract
This study examined the role of peroxiredoxin2 (Prx2) in aging-induced insulin resistance and reduction in skeletal muscle function in young (2-month-old) and old (24-month-old) Prx2 knockout (KO) and wild-type mice. Plasma insulin levels increased with aging in Prx2 KO mice but not in wild-type mice. Insulin sensitivity in the whole-body and skeletal muscle as assessed with the hyperinsulinemic-euglycemic clamp was lower in Prx2 KO mice than in wild-type mice in the old group but was not significantly different between the two genotypes in the young group. Insulin-induced activation of intracellular signaling molecules was also suppressed in old Prx2 KO mice compared to their wild-type littermates. Oxidative stress, inflammation, and p53 expression levels in skeletal muscle were higher in Prx2 KO mice than in wild-type mice in the old group but were not different between the two genotypes in the young group. p53 expression was negatively correlated with skeletal muscle insulin sensitivity in old mice. Skeletal muscle mass was similar between the two genotypes but grip strength was reduced in old Prx2 KO mice compared to old wild-type mice. These results suggest that Prx2 plays a protective role in aging-induced insulin resistance and declines in muscle strength by suppressing oxidative stress.
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Affiliation(s)
- Hye-Na Cha
- Department of Physiology, College of Medicine, Yeungnam University, Daegu, Korea.,Smart-Aging Convergence Research Center, College of Medicine, Yeungnam University, Daegu, Korea
| | - Soyoung Park
- Department of Physiology, College of Medicine, Yeungnam University, Daegu, Korea.,Smart-Aging Convergence Research Center, College of Medicine, Yeungnam University, Daegu, Korea
| | - Yongwook Dan
- Weinberg College of Art and Sciences, Northwestern University, Chicago, Illinois
| | - Jae-Ryong Kim
- Smart-Aging Convergence Research Center, College of Medicine, Yeungnam University, Daegu, Korea.,Department of Biochemistry and Molecular Biology, College of Medicine, Yeungnam University, Daegu, Korea
| | - So-Young Park
- Department of Physiology, College of Medicine, Yeungnam University, Daegu, Korea.,Smart-Aging Convergence Research Center, College of Medicine, Yeungnam University, Daegu, Korea
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18
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Ghrelin Signaling in Immunometabolism and Inflamm-Aging. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1090:165-182. [PMID: 30390290 DOI: 10.1007/978-981-13-1286-1_9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Intracellular changes in immune cells lead to metabolic dysfunction, which is termed immunometabolism. Chronic inflammation is a hallmark of aging; this phenomenon is described as inflamm-aging. Immunometabolism and inflamm-aging are closely linked to obesity, insulin resistance, type 2 diabetes (T2D), cardiovascular diseases, and cancers, which consequently reduce life span and health span of the elderly. Ghrelin is an orexigenic hormone that regulates appetite and food intake. Ghrelin's functions are mediated through its receptor, growth hormone secretagogue receptor (GHS-R). Ghrelin and GHS-R have important roles in age-associated obesity, insulin resistance, and T2D. In this chapter, we have discussed the roles of ghrelin signaling in diet-induced obesity and normal aging as it relates to energy metabolism and inflammation in key metabolic tissues and organs. The new findings reveal that ghrelin signaling is an important regulatory mechanism for immunometabolism and inflamm-aging. Ghrelin signaling offers an exciting novel therapeutic strategy for treatment of obesity and insulin resistance of the elderly.
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19
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Zhong L, Tran T, Baguley TD, Lee SJ, Henke A, To A, Li S, Yu S, Grieco FA, Roland J, Schultz PG, Eizirik DL, Rogers N, Chartterjee AK, Tremblay MS, Shen W. A novel inhibitor of inducible NOS dimerization protects against cytokine-induced rat beta cell dysfunction. Br J Pharmacol 2018; 175:3470-3485. [PMID: 29888783 PMCID: PMC6086989 DOI: 10.1111/bph.14388] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 05/14/2018] [Accepted: 05/28/2018] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND AND PURPOSE Beta cell apoptosis is a major feature of type 1 diabetes, and pro-inflammatory cytokines are key drivers of the deterioration of beta cell mass through induction of apoptosis. Mitochondrial stress plays a critical role in mediating apoptosis by releasing cytochrome C into the cytoplasm, directly activating caspase-9 and its downstream signalling cascade. We aimed to identify new compounds that protect beta cells from cytokine-induced activation of the intrinsic (mitochondrial) pathway of apoptosis. EXPERIMENTAL APPROACH Diabetogenic media, composed of IL-1β, IFN-γ and high glucose, were used to induce mitochondrial stress in rat insulin-producing INS1E cells, and a high-content image-based screen of small molecule modulators of Casp9 pathway was performed. KEY RESULTS A novel small molecule, ATV399, was identified from a high-content image-based screen for compounds that inhibit cleaved caspase-9 activation and subsequent beta cell apoptosis induced by a combination of IL-1β, IFN-γ and high glucose, which together mimic the pathogenic diabetic milieu. Through medicinal chemistry optimization, potency was markedly improved (6-30 fold), with reduced inhibitory effects on CYP3A4. Improved analogues, such as CAT639, improved beta cell viability and insulin secretion in cytokine-treated rat insulin-producing INS1E cells and primary dispersed islet cells. Mechanistically, CAT639 reduced the production of NO by allosterically inhibiting dimerization of inducible NOS (iNOS) without affecting its mRNA levels. CONCLUSION AND IMPLICATIONS Taken together, these studies demonstrate a successful phenotypic screening campaign resulting in identification of an inhibitor of iNOS dimerization that protects beta cell viability and function through modulation of mitochondrial stress induced by cytokines.
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Affiliation(s)
- Linlin Zhong
- California Institute for Biomedical Research (Calibr)La JollaCA92037USA
| | - Tuan Tran
- California Institute for Biomedical Research (Calibr)La JollaCA92037USA
| | - Tyler D Baguley
- California Institute for Biomedical Research (Calibr)La JollaCA92037USA
| | - Sang Jun Lee
- California Institute for Biomedical Research (Calibr)La JollaCA92037USA
| | - Adam Henke
- California Institute for Biomedical Research (Calibr)La JollaCA92037USA
| | - Andrew To
- California Institute for Biomedical Research (Calibr)La JollaCA92037USA
| | - Sijia Li
- California Institute for Biomedical Research (Calibr)La JollaCA92037USA
| | - Shan Yu
- California Institute for Biomedical Research (Calibr)La JollaCA92037USA
| | - Fabio A Grieco
- ULB Center for Diabetes ResearchUniversite´ Libre de Bruxelles (ULB)Brussels1070Belgium
| | - Jason Roland
- California Institute for Biomedical Research (Calibr)La JollaCA92037USA
| | - Peter G Schultz
- California Institute for Biomedical Research (Calibr)La JollaCA92037USA
- Department of ChemistryThe Scripps Research InstituteLa JollaCA92037USA
| | - Decio L Eizirik
- ULB Center for Diabetes ResearchUniversite´ Libre de Bruxelles (ULB)Brussels1070Belgium
| | - Nikki Rogers
- California Institute for Biomedical Research (Calibr)La JollaCA92037USA
| | | | | | - Weijun Shen
- California Institute for Biomedical Research (Calibr)La JollaCA92037USA
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20
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Cha SH, Hwang Y, Kim KN, Jun HS. Palmitate induces nitric oxide production and inflammatory cytokine expression in zebrafish. FISH & SHELLFISH IMMUNOLOGY 2018; 79:163-167. [PMID: 29772372 DOI: 10.1016/j.fsi.2018.05.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 04/27/2018] [Accepted: 05/13/2018] [Indexed: 06/08/2023]
Abstract
Inflammation markers in zebrafish embryos reflect a toxic response that is common to other animal models and humans. Free fatty acids (FFAs) are known to cause damage in various tissues by inducing inflammation. In this study, we investigated whether a FFA (palmitate) induces inflammation in zebrafish embryos. Nitrous oxide (NO) production and cyclooxygenase-2 (COX-2) mRNA expression were increased in palmitate-treated zebrafish embryos in a dose-dependent manner. mRNA expression of pro-inflammatory cytokines, interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF- α), were also increased. Additionally, the mRNA expression of p65 nuclear factor-kB and I-kB-α were significantly increased after palmitate-treatment. Increased reactive oxygen species (ROS) expression was observed in palmitate-treated zebrafish embryos as well as pericardial edema. Additionally, mRNA expression of pro-inflammatory cytokines were increased in zebrafish liver and pancreas fed with palmitate-contained diet. Taken together, these results indicated that palmitate increases pro-inflammatory mediators in zebrafish embryos, suggesting that zebrafish could be an alternative animal model for inflammatory disease including diabetes.
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Affiliation(s)
- Seon-Heui Cha
- College of Pharmacy, Gachon University, Incheon 21936, Republic of Korea; Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon 21936, Republic of Korea; Gachon Medical and Convergence Institute, Gachon Gil Medical Center, Incheon 21565, Republic of Korea
| | - Yongha Hwang
- College of Pharmacy, Gachon University, Incheon 21936, Republic of Korea; Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon 21936, Republic of Korea
| | - Kil-Nam Kim
- Chuncheon Center, Korea Basic Science Institute (KBSI), Chuncheon 24341, Republic of Korea
| | - Hee-Sook Jun
- College of Pharmacy, Gachon University, Incheon 21936, Republic of Korea; Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon 21936, Republic of Korea; Gachon Medical and Convergence Institute, Gachon Gil Medical Center, Incheon 21565, Republic of Korea.
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21
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Subiela JV, Torres SH, De Sanctis JB, Hernández N. Cardiorespiratory responses, nitric oxide production and inflammatory factors in patients with myocardial infarction after rehabilitation. Nitric Oxide 2018. [DOI: 10.1016/j.niox.2018.03.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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22
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lyoussi B, Cherkaoui-Tangi K, Morel N, Wibo M. Characterization of vascular dysregulation in meriones shawi after high-calorie diet feeding. Clin Exp Hypertens 2018; 40:353-362. [DOI: 10.1080/10641963.2017.1377219] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Badiaa lyoussi
- Laboratoire de physiologie-pharmacologie et santé environnementale, Faculté des Sciences Dhar-Mahraz, Université Sidi Mohamed Ben Abdallah, POBox 1976 Fès Atlas, Fès, Morocco
| | - khadija Cherkaoui-Tangi
- Laboratoire de physiologie-pharmacologie et santé environnementale, Faculté des Sciences Dhar-Mahraz, Université Sidi Mohamed Ben Abdallah, POBox 1976 Fès Atlas, Fès, Morocco
- Secteur des Sciences de la Santé, Université catholique de Louvain, Bruxelles, Belgium
| | - Nicole Morel
- Secteur des Sciences de la Santé, Université catholique de Louvain, Bruxelles, Belgium
| | - Maurice Wibo
- Secteur des Sciences de la Santé, Université catholique de Louvain, Bruxelles, Belgium
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23
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Liu D, Morales FE, IglayReger HB, Treutelaar MK, Rothberg AE, Hubal MJ, Nadler EP, Robidoux J, Barakat H, Horowitz JF, Hoffman EP, Burant CF, Gordon PM. Expression of macrophage genes within skeletal muscle correlates inversely with adiposity and insulin resistance in humans. Appl Physiol Nutr Metab 2017; 43:187-193. [PMID: 29035695 DOI: 10.1139/apnm-2017-0228] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Local inflammation in obese adipose tissue has been shown to contribute to insulin resistance; however, the role of macrophage infiltration within skeletal muscle is still debatable. This study aimed to evaluate the association of skeletal muscle macrophage gene expression with adiposity levels and insulin sensitivity in obese patients. Twenty-two nondiabetic obese patients and 23 healthy lean controls were included. Obese patients underwent a 3-month weight loss intervention. Macrophage gene expression in skeletal muscle (quantitative real-time polymerase chain reaction), body composition (dual-energy X-ray absorptiometry), and insulin sensitivity (homeostatic model assessment (HOMA) and oral glucose tolerance test) were compared between groups and their associations were analyzed. To validate skeletal muscle findings, we repeated the analyses with macrophage gene expression in adipose tissue. Expression levels of macrophage genes (CD68, CD11b, CD206, CD16, CD40, and CD163) were lower in skeletal muscle tissue of obese versus lean participants. Macrophage gene expression was also found to be inversely associated with adiposity, fasting insulin, and HOMA (r = -0.4 ∼ -0.6, p < 0.05), as well as positively associated with insulin sensitivity (r = 0.4 ∼ 0.8, p < 0.05). On the other hand, adipose tissue macrophage gene expression showed higher levels in obese versus lean participants, presenting a positive association with adiposity levels. Macrophage gene expression, in both skeletal and adipose tissue samples, was only minimally affected by the weight loss intervention. In contrast with the established positive relationship between adiposity and macrophage gene expression, an unexpected inverse correlation between these 2 variables was observed in skeletal muscle tissue. Additionally, muscle macrophage gene expression was inversely correlated with insulin resistance.
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Affiliation(s)
- Dongmei Liu
- a Department of Physical Medicine & Rehabilitation, University of Michigan, Ann Arbor, MI 48108, USA.,b School of Kinesiology, Shanghai University of Sports, Shanghai 200433, China
| | - Flor Elisa Morales
- c Department of Health, Human Performance and Recreation, Baylor University, Waco, TX 76798, USA
| | - Heidi B IglayReger
- a Department of Physical Medicine & Rehabilitation, University of Michigan, Ann Arbor, MI 48108, USA.,d Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48105, USA
| | - Mary K Treutelaar
- d Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48105, USA
| | - Amy E Rothberg
- d Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48105, USA
| | - Monica J Hubal
- e Children's National Medical Center, Washington, DC 20010, USA
| | - Evan P Nadler
- e Children's National Medical Center, Washington, DC 20010, USA
| | - Jacques Robidoux
- f Department of Pharmacology and Toxicology, East Carolina University, Greenville, NC 27858, USA
| | - Hisham Barakat
- f Department of Pharmacology and Toxicology, East Carolina University, Greenville, NC 27858, USA
| | - Jeffrey F Horowitz
- g School of Kinesiology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Eric P Hoffman
- e Children's National Medical Center, Washington, DC 20010, USA
| | - Charles F Burant
- d Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48105, USA
| | - Paul M Gordon
- a Department of Physical Medicine & Rehabilitation, University of Michigan, Ann Arbor, MI 48108, USA.,c Department of Health, Human Performance and Recreation, Baylor University, Waco, TX 76798, USA
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24
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Kellogg DL, McCammon KM, Hinchee-Rodriguez KS, Adamo ML, Roman LJ. Neuronal nitric oxide synthase mediates insulin- and oxidative stress-induced glucose uptake in skeletal muscle myotubes. Free Radic Biol Med 2017; 110:261-269. [PMID: 28666850 PMCID: PMC5554434 DOI: 10.1016/j.freeradbiomed.2017.06.018] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 06/13/2017] [Accepted: 06/26/2017] [Indexed: 10/19/2022]
Abstract
Previously published studies strongly suggested that insulin- and exercise-induced skeletal muscle glucose uptake require nitric oxide (NO) production. However, the signal transduction mechanisms by which insulin and contraction regulated NO production and subsequent glucose transport are not known. In the present study, we utilized the myotube cell lines treated with insulin or hydrogen peroxide, the latter to mimic contraction-induced oxidative stress, to characterize these mechanisms. We found that insulin stimulation of neuronal nitric oxide synthase (nNOS) phosphorylation, NO production, and GLUT4 translocation were all significantly reduced by inhibition of either nNOS or Akt2. Hydrogen peroxide (H2O2) induced phosphorylation of nNOS at the same residue as did insulin, and also stimulated NO production and GLUT4 translocation. nNOS inhibition prevented H2O2-induced GLUT4 translocation. AMP activated protein kinase (AMPK) inhibition prevented H2O2 activation and phosphorylation of nNOS, leading to reduced NO production and significantly attenuated GLUT4 translocation. We conclude that nNOS phosphorylation and subsequently increased NO production are required for both insulin- and H2O2-stimulated glucose transport. Although the two stimuli result in phosphorylation of the same residue on nNOS, they do so through distinct protein kinases. Thus, insulin and H2O2-activated signaling pathways converge on nNOS, which is a common mediator of glucose uptake in both pathways. However, the fact that different kinases are utilized provides a basis for the use of exercise to activate glucose transport in the face of insulin resistance.
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Affiliation(s)
- Dean L Kellogg
- Department of Biochemistry and Structural Biology, The University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Dr., San Antonio, TX 78229, United States
| | - Karen M McCammon
- Department of Biochemistry and Structural Biology, The University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Dr., San Antonio, TX 78229, United States
| | - Kathryn S Hinchee-Rodriguez
- Department of Biochemistry and Structural Biology, The University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Dr., San Antonio, TX 78229, United States
| | - Martin L Adamo
- Department of Biochemistry and Structural Biology, The University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Dr., San Antonio, TX 78229, United States
| | - Linda J Roman
- Department of Biochemistry and Structural Biology, The University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Dr., San Antonio, TX 78229, United States.
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Corylin protects LPS-induced sepsis and attenuates LPS-induced inflammatory response. Sci Rep 2017; 7:46299. [PMID: 28397806 PMCID: PMC5387730 DOI: 10.1038/srep46299] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 03/14/2017] [Indexed: 01/04/2023] Open
Abstract
Corylin is a main compound isolated from Psoralea corylifolia L. (Fabaceae). A variety of pharmacological effects such as antioxidant, anti-proliferation, and anti-inflammatory properties of corylin have been reported. Nevertheless, the effect of corylin in microbial infection and sepsis remains unclear. In the present study, we investigated the anti-inflammatory effects of corylin. Our experimental results demonstrated that corylin inhibited the production of TNF-α, IL-6 and NO by both LPS-activated RAW 264.7 cells and LPS-activated murine peritoneal macrophages. Moreover, corylin suppressed the expression levels of iNOS and COX-2, reduced the production of PGE2 and HMGB1, blocked the translocation of HMGB1 from the nucleus to cytosol, and decreased the phosphorylation of MAPKs in LPS-activated RAW 264.7 cells as well as suppressed the activity of NF-κB in LPS-activated J-Blue cells. In addition, the administration of corylin reduced the production of NO and TNF-α, decreased LPS-induced liver damage markers (AST and ALT) and kidney damage markers (BUN and CRE), attenuated infiltration of inflammatory cells and tissue damage of lung, liver and kidney, and enhanced the survival rate of LPS-challenged mice. Taken together, these results show the anti-inflammatory properties of corylin on LPS-induced inflammation and sepsis. Corylin could potentially be a novel anti-inflammatory and immunosuppressive drug candidate in the treatment of sepsis and septic shock.
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Akai S, Oda S, Yokoi T. Establishment of a novel mouse model for pioglitazone-induced skeletal muscle injury. Toxicology 2017; 382:1-9. [PMID: 28263783 DOI: 10.1016/j.tox.2017.03.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 02/27/2017] [Accepted: 03/01/2017] [Indexed: 10/20/2022]
Abstract
Skeletal muscle (SKM) injury is one of the major safety concerns in risk assessment for drug development. However, no appropriate pre-clinical animal model exists to evaluate drug-induced SKM injury except that caused by fibrates and statins. Thiazolidinedione, a PPARγ agonistic drug for type 2 diabetes mellitus, is widely used clinically but can induce adverse effects such as hepatotoxicity and SKM injury, as has been reported in recent decades. Moreover, thiazolidinedione-induced SKM injury has only been reported in humans, and no evidence of SKM injury has been observed in rodents. To establish a drug-induced SKM injury mouse model, we administered pioglitazone with a glutathione biosynthesis inhibitor, L-buthionine-S,R-sulfoximine, to C57BL/6J mice for 2days and subsequently observed prominent increases in plasma aspartate aminotransferase and creatinine phosphokinase, which were associated with SKM lesions. Furthermore, plasma miR-206 (SKM-specific microRNA) level was significantly increased, whereas plasma miR-208 (heart-specific microRNA) was not detected, indicating that pioglitazone specifically caused SKM, not cardiac, injury. Furthermore, we revealed that pioglitazone-induced SKM injury was caused by oxidative stress that was independent of the PPARγ agonistic effect. This study demonstrated for the first time that the glutathione-depleted C57BL/6J mouse is a novel model for assessing drug-induced SKM injury in drug development.
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Affiliation(s)
- Sho Akai
- Department of Drug Safety Sciences, Division of Clinical Pharmacology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan.
| | - Shingo Oda
- Department of Drug Safety Sciences, Division of Clinical Pharmacology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan.
| | - Tsuyoshi Yokoi
- Department of Drug Safety Sciences, Division of Clinical Pharmacology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan.
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27
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Wu H, Ballantyne CM. Skeletal muscle inflammation and insulin resistance in obesity. J Clin Invest 2017; 127:43-54. [PMID: 28045398 DOI: 10.1172/jci88880] [Citation(s) in RCA: 362] [Impact Index Per Article: 51.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Obesity is associated with chronic inflammation, which contributes to insulin resistance and type 2 diabetes mellitus. Under normal conditions, skeletal muscle is responsible for the majority of insulin-stimulated whole-body glucose disposal; thus, dysregulation of skeletal muscle metabolism can strongly influence whole-body glucose homeostasis and insulin sensitivity. Increasing evidence suggests that inflammation occurs in skeletal muscle in obesity and is mainly manifested by increased immune cell infiltration and proinflammatory activation in intermyocellular and perimuscular adipose tissue. By secreting proinflammatory molecules, immune cells may induce myocyte inflammation, adversely regulate myocyte metabolism, and contribute to insulin resistance via paracrine effects. Increased influx of fatty acids and inflammatory molecules from other tissues, particularly visceral adipose tissue, can also induce muscle inflammation and negatively regulate myocyte metabolism, leading to insulin resistance.
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Heo JY, Cha HN, Kim KY, Lee E, Kim SJ, Kim YW, Kim JY, Lee IK, Gladyshev VN, Kim HY, Park SY. Methionine sulfoxide reductase B1 deficiency does not increase high-fat diet-induced insulin resistance in mice. Free Radic Res 2016; 51:24-37. [PMID: 27838938 DOI: 10.1080/10715762.2016.1261133] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Methionine-S-sulfoxide reductase (MsrA) protects against high-fat diet-induced insulin resistance due to its antioxidant effects. To determine whether its counterpart, methionine-R-sulfoxide reductase (MsrB) has similar effects, we compared MsrB1 knockout and wild-type mice using a hyperinsulinemic-euglycemic clamp technique. High-fat feeding for eight weeks increased body weights, fat masses, and plasma levels of glucose, insulin, and triglycerides to similar extents in wild-type and MsrB1 knockout mice. Intraperitoneal glucose tolerance test showed no difference in blood glucose levels between the two genotypes after eight weeks on the high-fat diet. The hyperglycemic-euglycemic clamp study showed that glucose infusion rates and whole body glucose uptakes were decreased to similar extents by the high-fat diet in both wild-type and MsrB1 knockout mice. Hepatic glucose production and glucose uptake of skeletal muscle were unaffected by MsrB1 deficiency. The high-fat diet-induced oxidative stress in skeletal muscle and liver was not aggravated in MsrB1-deficient mice. Interestingly, whereas MsrB1 deficiency reduced JNK protein levels to a great extent in skeletal muscle and liver, it markedly elevated phosphorylation of JNK, suggesting the involvement of MsrB1 in JNK protein activation. However, this JNK phosphorylation based on a p-JNK/JNK level did not positively correlate with insulin resistance in MsrB1-deficient mice. Taken together, our results show that, in contrast to MsrA deficiency, MsrB1 deficiency does not increase high-fat diet-induced insulin resistance in mice.
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Affiliation(s)
- Jung-Yoon Heo
- a Department of Physiology , College of Medicine, Yeungnam University , Daegu , Republic of Korea
| | - Hye-Na Cha
- a Department of Physiology , College of Medicine, Yeungnam University , Daegu , Republic of Korea
| | - Ki Young Kim
- b Department of Biochemistry and Molecular Biology, College of Medicine , Yeungnam University , Daegu , Republic of Korea
| | - Eujin Lee
- b Department of Biochemistry and Molecular Biology, College of Medicine , Yeungnam University , Daegu , Republic of Korea
| | - Suk-Jeong Kim
- a Department of Physiology , College of Medicine, Yeungnam University , Daegu , Republic of Korea
| | - Yong-Woon Kim
- a Department of Physiology , College of Medicine, Yeungnam University , Daegu , Republic of Korea
| | - Jong-Yeon Kim
- a Department of Physiology , College of Medicine, Yeungnam University , Daegu , Republic of Korea
| | - In-Kyu Lee
- c Department of Internal Medicine, School of Medicine , Kyungpook National University , Daegu , Republic of Korea
| | - Vadim N Gladyshev
- d Division of Genetics, Department of Medicine Brigham and Women's Hospital , Harvard Medical School , Boston , MA , USA
| | - Hwa-Young Kim
- b Department of Biochemistry and Molecular Biology, College of Medicine , Yeungnam University , Daegu , Republic of Korea
| | - So-Young Park
- a Department of Physiology , College of Medicine, Yeungnam University , Daegu , Republic of Korea
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Altered Interleukin-10 Signaling in Skeletal Muscle Regulates Obesity-Mediated Inflammation and Insulin Resistance. Mol Cell Biol 2016; 36:2956-2966. [PMID: 27644327 DOI: 10.1128/mcb.00181-16] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 09/13/2016] [Indexed: 12/20/2022] Open
Abstract
Skeletal muscle insulin resistance is a major characteristic of obesity and type 2 diabetes. Although obesity-mediated inflammation is causally associated with insulin resistance, the underlying mechanism is unclear. Here, we examined the effects of chronic obesity in mice with muscle-specific overexpression of interleukin-10 (MIL10). After 16 weeks of a high-fat diet (HFD), MIL10 mice became markedly obese but showed improved insulin action compared to that of wild-type mice, which was largely due to increased glucose metabolism and reduced inflammation in skeletal muscle. Since leptin regulates inflammation, the beneficial effects of interleukin-10 (IL-10) were further examined in leptin-deficient ob/ob mice. Muscle-specific overexpression of IL-10 in ob/ob mice (MCK-IL10ob/ob) did not affect spontaneous obesity, but MCK-IL10ob/ob mice showed increased glucose turnover compared to that in ob/ob mice. Last, mice with muscle-specific ablation of IL-10 receptor (M-IL10R-/-) were generated to determine whether IL-10 signaling in skeletal muscle is involved in IL-10 effects on glucose metabolism. After an HFD, M-IL10R-/- mice developed insulin resistance with reduced glucose metabolism compared to that in wild-type mice. Overall, these results demonstrate IL-10 effects to attenuate obesity-mediated inflammation and improve insulin sensitivity in skeletal muscle, and our findings implicate a potential therapeutic role of anti-inflammatory cytokines in treating insulin resistance and type 2 diabetes.
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Brinkmann C, Schulte-Körne B, Grau M, Obels S, Kemmerling R, Schiffer T, Bloch W, Brixius K. Effects of Endurance Training on the Skeletal Muscle Nitric Oxide Metabolism in Insulin-Independent Type 2 Diabetic Men-A Pilot Study. Metab Syndr Relat Disord 2016; 15:52-58. [PMID: 27782779 DOI: 10.1089/met.2016.0092] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Increases in the amount of inducible nitric oxide synthase (iNOS) protein and abnormal production of nitric oxide (NO) in skeletal muscle have been suggested to be associated with peripheral insulin resistance in patients with type 2 diabetes mellitus (T2DM). This pilot study analyzed whether a 3-month endurance training can affect iNOS protein and NO metabolite levels in the vastus lateralis muscle of insulin-independent T2DM men, thereby affecting the patients` glycemic control. Furthermore, serum molecules, which have been shown to activate iNOS protein expression in in vitro experiments, were quantified. METHODS Eight overweight/obese T2DM men (years = 61 ± 10) participated in the study. Muscle biopsies and venous blood collections were performed at T1 (6 weeks before training), T2 (1 week before training), and T3 (3 to 4 days after training). Protein contents (iNOS) were determined by Western blotting, nitrite concentrations by chemiluminescence, and serum molecule levels by enzyme-linked immunosorbent assay kits. RESULTS The training reduced iNOS protein contents significantly (T2-T3: approximately -31%, P = 0.018). Nitrite concentrations as well as fasting glucose and HbA1c decreased, but not significantly. Serum tumor necrosis factor-α, thiobarbituric acid-reactive substances (lipid peroxidation as an indirect measure of reactive oxygen species), lipopolysaccharide binding protein, interferon-γ, and interleukin-1β showed no significant changes. CONCLUSIONS The data indicate that the endurance training performed in the present study can reduce iNOS protein contents in insulin-independent T2DM men. Future studies should identify key molecules in iNOS regulation in vivo and fully clarify whether iNOS downregulation can help improve insulin sensitivity in T2DM patients in the long term.
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Affiliation(s)
- Christian Brinkmann
- 1 Department of Molecular and Cellular Sport Medicine, Institute of Cardiovascular Research and Sport Medicine, German Sport University Cologne , Cologne, Germany
| | - Benedikt Schulte-Körne
- 1 Department of Molecular and Cellular Sport Medicine, Institute of Cardiovascular Research and Sport Medicine, German Sport University Cologne , Cologne, Germany
| | - Marijke Grau
- 1 Department of Molecular and Cellular Sport Medicine, Institute of Cardiovascular Research and Sport Medicine, German Sport University Cologne , Cologne, Germany
| | - Sinja Obels
- 1 Department of Molecular and Cellular Sport Medicine, Institute of Cardiovascular Research and Sport Medicine, German Sport University Cologne , Cologne, Germany
| | - Roman Kemmerling
- 1 Department of Molecular and Cellular Sport Medicine, Institute of Cardiovascular Research and Sport Medicine, German Sport University Cologne , Cologne, Germany
| | - Thorsten Schiffer
- 2 Outpatient Clinic for Sports Traumatology and Public Health Consultation, German Sport University Cologne , Cologne, Germany
| | - Wilhelm Bloch
- 1 Department of Molecular and Cellular Sport Medicine, Institute of Cardiovascular Research and Sport Medicine, German Sport University Cologne , Cologne, Germany
| | - Klara Brixius
- 1 Department of Molecular and Cellular Sport Medicine, Institute of Cardiovascular Research and Sport Medicine, German Sport University Cologne , Cologne, Germany
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31
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Peroxynitrite: From interception to signaling. Arch Biochem Biophys 2016; 595:153-60. [PMID: 27095233 DOI: 10.1016/j.abb.2015.06.022] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Accepted: 06/12/2015] [Indexed: 12/18/2022]
Abstract
Peroxynitrite is a strong oxidant and nitrating species that mediates certain biological effects of superoxide and nitrogen monoxide. These biological effects include oxidative damage to proteins as well as the formation of 3-nitrotyrosyl moieties in proteins. As a consequence, such proteins may lose their activity, gain altered function, or become prone to proteolytic degradation - resulting in modulation of cellular protein turnover and in the modulation of signaling cascades. In analogy to hydrogen peroxide, peroxynitrite may be scavenged by selenoproteins like glutathione peroxidase-1 (GPx-1) or by selenocompounds with a GPx-like activity, such as ebselen; in further analogy to H2O2, peroxiredoxins have also been established as contributors to peroxynitrite reduction. This review covers three aspects of peroxynitrite biochemistry, (i) the interaction of selenocompounds/-proteins with peroxynitrite, (ii) peroxynitrite-induced modulation of cellular proteolysis, and (iii) peroxynitrite-induced modulation of cellular signaling.
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Mason SA, Della Gatta PA, Snow RJ, Russell AP, Wadley GD. Ascorbic acid supplementation improves skeletal muscle oxidative stress and insulin sensitivity in people with type 2 diabetes: Findings of a randomized controlled study. Free Radic Biol Med 2016; 93:227-38. [PMID: 26774673 DOI: 10.1016/j.freeradbiomed.2016.01.006] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 01/06/2016] [Accepted: 01/12/2016] [Indexed: 12/25/2022]
Abstract
AIM/HYPOTHESIS Skeletal muscle insulin resistance and oxidative stress are characteristic metabolic disturbances in people with type 2 diabetes. Studies in insulin resistant rodents show an improvement in skeletal muscle insulin sensitivity and oxidative stress following antioxidant supplementation. We therefore investigated the potential ameliorative effects of antioxidant ascorbic acid (AA) supplementation on skeletal muscle insulin sensitivity and oxidative stress in people with type 2 diabetes. METHODS Participants with stable glucose control commenced a randomized cross-over study involving four months of AA (2 × 500 mg/day) or placebo supplementation. Insulin sensitivity was assessed using a hyperinsulinaemic, euglycaemic clamp coupled with infusion of 6,6-D2 glucose. Muscle biopsies were measured for AA concentration and oxidative stress markers that included basal measures (2',7'-dichlorofluorescin [DCFH] oxidation, ratio of reduced-to-oxidized glutathione [GSH/GSSG] and F2-Isoprostanes) and insulin-stimulated measures (DCFH oxidation). Antioxidant concentrations, citrate synthase activity and protein abundances of sodium-dependent vitamin C transporter 2 (SVCT2), total Akt and phosphorylated Akt (ser473) were also measured in muscle samples. RESULTS AA supplementation significantly increased insulin-mediated glucose disposal (delta rate of glucose disappearance; ∆Rd) (p=0.009), peripheral insulin-sensitivity index (p=0.046), skeletal muscle AA concentration (p=0.017) and muscle SVCT2 protein expression (p=0.008); but significantly decreased skeletal muscle DCFH oxidation during hyperinsulinaemia (p=0.007) when compared with placebo. Total superoxide dismutase activity was also lower following AA supplementation when compared with placebo (p=0.006). Basal oxidative stress markers, citrate synthase activity, endogenous glucose production, HbA1C and muscle Akt expression were not significantly altered by AA supplementation. CONCLUSIONS/INTERPRETATION In summary, oral AA supplementation ameliorates skeletal muscle oxidative stress during hyperinsulinaemia and improves insulin-mediated glucose disposal in people with type 2 diabetes. Findings implicate AA supplementation as a potentially inexpensive, convenient, and effective adjunct therapy in the treatment of insulin resistance in people with type 2 diabetes.
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Affiliation(s)
- Shaun A Mason
- Centre for Physical Activity and Nutrition (C-PAN) Research, School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia
| | - Paul A Della Gatta
- Centre for Physical Activity and Nutrition (C-PAN) Research, School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia
| | - Rod J Snow
- Centre for Physical Activity and Nutrition (C-PAN) Research, School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia
| | - Aaron P Russell
- Centre for Physical Activity and Nutrition (C-PAN) Research, School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia
| | - Glenn D Wadley
- Centre for Physical Activity and Nutrition (C-PAN) Research, School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia.
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Johns M, Esmaeili Mohsen Abadi S, Malik N, Lee J, Neumann WL, Rausaria S, Imani-Nejad M, McPherson T, Schober J, Kwon G. Oral administration of SR-110, a peroxynitrite decomposing catalyst, enhances glucose homeostasis, insulin signaling, and islet architecture in B6D2F1 mice fed a high fat diet. Arch Biochem Biophys 2016; 596:126-37. [PMID: 26970045 DOI: 10.1016/j.abb.2016.03.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 02/23/2016] [Accepted: 03/02/2016] [Indexed: 01/03/2023]
Abstract
Peroxynitrite has been implicated in type 2 diabetes and diabetic complications. As a follow-up study to our previous work on SR-135 (Arch Biochem Biophys 577-578: 49-59, 2015), we provide evidence that this series of compounds are effective when administered orally, and their mechanisms of actions extend to the peripheral tissues. A more soluble analogue of SR-135, SR-110 (from a new class of Mn(III) bis(hydroxyphenyl)-dipyrromethene complexes) was orally administered for 2 weeks to B6D2F1 mice fed a high fat-diet (HFD). Mice fed a HFD for 4 months gained significantly higher body weights compared to lean diet-fed mice (52 ± 1.5 g vs 34 ± 1.3 g). SR-110 (10 mg/kg daily) treatment significantly reduced fasting blood glucose and insulin levels, and enhanced glucose tolerance as compared to HFD control or vehicle (peanut butter) group. SR-110 treatment enhanced insulin signaling in the peripheral organs, liver, heart, and skeletal muscle, and reduced lipid accumulation in the liver. Furthermore, SR-110 increased insulin content, restored islet architecture, decreased islet size, and reduced tyrosine nitration. These results suggest that a peroxynitrite decomposing catalyst is effective in improving glucose homeostasis and restoring islet morphology and β-cell insulin content under nutrient overload.
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Affiliation(s)
- Michael Johns
- Department of Biological Sciences, Southern Illinois University Edwardsville, Edwardsville, IL, 62026, USA
| | | | - Nehal Malik
- Department of Biological Sciences, Southern Illinois University Edwardsville, Edwardsville, IL, 62026, USA
| | - Joshua Lee
- School of Pharmacy, Southern Illinois University Edwardsville, Edwardsville, IL, 62026, USA
| | - William L Neumann
- School of Pharmacy, Southern Illinois University Edwardsville, Edwardsville, IL, 62026, USA
| | - Smita Rausaria
- School of Pharmacy, Southern Illinois University Edwardsville, Edwardsville, IL, 62026, USA
| | - Maryam Imani-Nejad
- School of Pharmacy, Southern Illinois University Edwardsville, Edwardsville, IL, 62026, USA
| | - Timothy McPherson
- School of Pharmacy, Southern Illinois University Edwardsville, Edwardsville, IL, 62026, USA
| | - Joseph Schober
- School of Pharmacy, Southern Illinois University Edwardsville, Edwardsville, IL, 62026, USA
| | - Guim Kwon
- School of Pharmacy, Southern Illinois University Edwardsville, Edwardsville, IL, 62026, USA.
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Nyberg M, Gliemann L, Hellsten Y. Vascular function in health, hypertension, and diabetes: effect of physical activity on skeletal muscle microcirculation. Scand J Med Sci Sports 2015; 25 Suppl 4:60-73. [DOI: 10.1111/sms.12591] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/28/2015] [Indexed: 12/31/2022]
Affiliation(s)
- M. Nyberg
- Department of Nutrition, Exercise and Sports; University of Copenhagen; Copenhagen Denmark
| | - L. Gliemann
- Department of Nutrition, Exercise and Sports; University of Copenhagen; Copenhagen Denmark
| | - Y. Hellsten
- Department of Nutrition, Exercise and Sports; University of Copenhagen; Copenhagen Denmark
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Reimann M, Vilser W, Gruber M, Bornstein SR, Ziemssen T. Insulin is a key determinant of elevated retinal arteriolar flicker response in insulin-resistant individuals. Diabetologia 2015; 58:2154-60. [PMID: 26003327 DOI: 10.1007/s00125-015-3639-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 04/29/2015] [Indexed: 10/23/2022]
Abstract
AIMS/HYPOTHESIS Insulin may link metabolic disorders to retinal microvascular pathology. The aim of the present study was to investigate the impact of early insulin resistance on retinal microcirculation. METHODS Retinal diameter responses to flicker-light stimulation were investigated in 81 clinically healthy participants (32 ± 6 years [mean ± SD], 59% women) who were recruited according to their BMI. All participants underwent an OGTT and euglycaemic-hyperinsulinaemic clamp (40 mU/m(2) · min(-1) insulin dose). After stratification by low and high insulin sensitivity based on a clamp-derived glucose disposal rate of ≤ or >4.9 mg/kg body mass, respectively, baseline retinal diameters and their relative changes to flicker stimulation were compared while controlling for mean arterial pressure, BMI and sex. RESULTS The arterial vasodilator response at the end of flicker stimulation (p = 0.044) and the area under the arterial reaction curve during flicker stimulation (p = 0.015) were significantly higher in individuals with low vs high insulin sensitivity. Vasodilatory responses of retinal veins to flicker stimulation and baseline retinal diameters did not differ between insulin-sensitive and insulin-resistant participants (p > 0.05). In a stepwise linear regression analysis, fasting insulin remained the only predictor of the arterial vasodilator response to flicker-light (p < 0.01). Waist circumference also contributed, although to a lesser extent, to the arterial vasodilator response (p = 0.023). CONCLUSIONS/INTERPRETATION Insulin sensitivity is an important determinant of retinal microvascular function. We propose that the elevated arterial flicker response in insulin-resistant states is a result of higher circulating insulin levels.
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Affiliation(s)
- Manja Reimann
- Autonomic and Neuroendocrinological Laboratory Dresden, Department of Neurology, University Hospital Carl Gustav Carus, Technische Universität Dresden, Fetscherstr. 74, 01307, Dresden, Germany,
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Unacylated ghrelin restores insulin and autophagic signaling in skeletal muscle of diabetic mice. Pflugers Arch 2015; 467:2555-69. [PMID: 26228926 DOI: 10.1007/s00424-015-1721-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 06/21/2015] [Accepted: 07/13/2015] [Indexed: 01/04/2023]
Abstract
Impairment of insulin signaling in skeletal muscle detrimentally affects insulin-stimulated disposal of glucose. Restoration of insulin signaling in skeletal muscle is important as muscle is one of the major sites for disposal of blood glucose. Recently, unacylated ghrelin (UnAG) has received attention in diabetic research due to its favorable actions on improving glucose tolerance, glycemic control, and insulin sensitivity. The investigation of UnAG has entered phase Ib clinical trial in type 2 diabetes and phase II clinical trial in hyperphagia in Prader-Willi syndrome. Nonetheless, the precise mechanisms responsible for the anti-diabetic actions of UnAG remain incompletely understood. In this study, we examined the effects of UnAG on restoring the impaired insulin signaling in skeletal muscle of db/db diabetic mice. Our results demonstrated that UnAG effectively restored the impaired insulin signaling in diabetic muscle. UnAG decreased insulin receptor substrate (IRS) phosphorylation, increased protein kinase B (Akt) phosphorylation, and, hence, suppressed mTOR signaling. Consequently, UnAG enhanced Glut4 localization and increased PDH activity in the diabetic skeletal muscle. Intriguingly, our data indicated that UnAG normalized the suppressed autophagic signaling in diabetic muscle. In conclusion, our findings illustrated that UnAG restored the impaired insulin and autophagic signaling in skeletal muscle of diabetic mice, which are valuable to understand the underlying mechanisms of the anti-diabetic action of UnAG at peripheral skeletal muscle level.
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Johns M, Fyalka R, Shea JA, Neumann WL, Rausaria S, Msengi EN, Imani-Nejad M, Zollars H, McPherson T, Schober J, Wooten J, Kwon G. SR-135, a peroxynitrite decomposing catalyst, enhances β-cell function and survival in B6D2F1 mice fed a high fat diet. Arch Biochem Biophys 2015; 577-578:49-59. [PMID: 25935364 DOI: 10.1016/j.abb.2015.04.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 04/14/2015] [Accepted: 04/17/2015] [Indexed: 02/07/2023]
Abstract
Peroxynitrite has been implicated in β-cell dysfunction and insulin resistance in obesity. Chemical catalysts that destroy peroxynitrite, therefore, may have therapeutic value for treating type 2 diabetes. To this end, we have recently demonstrated that Mn(III) bis(hydroxyphenyl)-dipyrromethene complexes, SR-135 and its analogs, can effectively catalyze the decomposition of peroxynitrite in vitro and in vivo through a 2-electron mechanism (Rausaria et al., 2011). To study the effects of SR-135 on glucose homeostasis in obesity, B6D2F1 mice were fed with a high fat-diet (HFD) for 12 weeks and treated with vehicle, SR-135 (5mg/kg), or a control drug SRB for 2 weeks. SR-135 significantly reduced fasting blood glucose and insulin levels, and enhanced glucose tolerance as compared to HFD control, vehicle or SRB. SR-135 also enhanced glucose-stimulated insulin secretion based on ex vivo studies. Moreover, SR-135 increased insulin content, restored islet architecture, decreased islet size, and reduced tyrosine nitration and apoptosis. These results suggest that a peroxynitrite decomposing catalyst enhances β-cell function and survival under nutrient overload.
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Affiliation(s)
- Michael Johns
- Department of Biological Sciences, Southern Illinois University Edwardsville, Edwardsville, IL 62026, United States
| | - Robert Fyalka
- Department of Biological Sciences, Southern Illinois University Edwardsville, Edwardsville, IL 62026, United States
| | - Jennifer A Shea
- Department of Biological Sciences, Southern Illinois University Edwardsville, Edwardsville, IL 62026, United States
| | - William L Neumann
- School of Pharmacy, Southern Illinois University Edwardsville, Edwardsville, IL 62026, United States
| | - Smita Rausaria
- School of Pharmacy, Southern Illinois University Edwardsville, Edwardsville, IL 62026, United States
| | - Eliwaza Naomi Msengi
- School of Pharmacy, Southern Illinois University Edwardsville, Edwardsville, IL 62026, United States
| | - Maryam Imani-Nejad
- School of Pharmacy, Southern Illinois University Edwardsville, Edwardsville, IL 62026, United States
| | - Harry Zollars
- School of Pharmacy, Southern Illinois University Edwardsville, Edwardsville, IL 62026, United States
| | - Timothy McPherson
- School of Pharmacy, Southern Illinois University Edwardsville, Edwardsville, IL 62026, United States
| | - Joseph Schober
- School of Pharmacy, Southern Illinois University Edwardsville, Edwardsville, IL 62026, United States
| | - Joshua Wooten
- Department of Kinesiology and Health Education, Southern Illinois University Edwardsville, Edwardsville, IL 62026, United States
| | - Guim Kwon
- School of Pharmacy, Southern Illinois University Edwardsville, Edwardsville, IL 62026, United States.
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Brown AE, Palsgaard J, Borup R, Avery P, Gunn DA, De Meyts P, Yeaman SJ, Walker M. p38 MAPK activation upregulates proinflammatory pathways in skeletal muscle cells from insulin-resistant type 2 diabetic patients. Am J Physiol Endocrinol Metab 2015; 308:E63-70. [PMID: 25370850 PMCID: PMC4281683 DOI: 10.1152/ajpendo.00115.2014] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Skeletal muscle is the key site of peripheral insulin resistance in type 2 diabetes. Insulin-stimulated glucose uptake is decreased in differentiated diabetic cultured myotubes, which is in keeping with a retained genetic/epigenetic defect of insulin action. We investigated differences in gene expression during differentiation between diabetic and control muscle cell cultures. Microarray analysis was performed using skeletal muscle cell cultures established from type 2 diabetic patients with a family history of type 2 diabetes and clinical evidence of marked insulin resistance and nondiabetic control subjects with no family history of diabetes. Genes and pathways upregulated with differentiation in the diabetic cultures, compared with controls, were identified using Gene Spring and Gene Set Enrichment Analysis. Gene sets upregulated in diabetic myotubes were associated predominantly with inflammation. p38 MAPK was identified as a key regulator of the expression of these proinflammatory gene sets, and p38 MAPK activation was found to be increased in the diabetic vs. control myotubes. Although inhibition of p38 MAPK activity decreased cytokine gene expression from the cultured diabetic myotubes significantly, it did not improve insulin-stimulated glucose uptake. Increased cytokine expression driven by increased p38 MAPK activation is a key feature of cultured myotubes derived from insulin-resistant type 2 diabetic patients. p38 MAPK inhibition decreased cytokine expression but did not affect the retained defect of impaired insulin action in the diabetic muscle cells.
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Affiliation(s)
- Audrey E Brown
- Institute of Cellular Medicine, Newcastle University, Newcastle, United Kingdom
| | - Jane Palsgaard
- Receptor Systems Biology Laboratory, Hagedorn Research Institute, Novo Nordisk, Gentofte, Denmark
| | - Rehannah Borup
- Department of Clinical Biochemistry, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Peter Avery
- School of Mathematics and Statistics, Newcastle University, Newcastle, United Kingdom; and
| | - David A Gunn
- Unilever Discover, Colworth Science Park, Sharnbrook, Bedford, United Kingdom
| | - Pierre De Meyts
- Receptor Systems Biology Laboratory, Hagedorn Research Institute, Novo Nordisk, Gentofte, Denmark
| | - Stephen J Yeaman
- Institute of Cellular Medicine, Newcastle University, Newcastle, United Kingdom
| | - Mark Walker
- Institute of Cellular Medicine, Newcastle University, Newcastle, United Kingdom;
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Cheng HS, Kong JMXF, Ng AXH, Chan WK, Ton SH, Abdul Kadir K. Novel Inhibitory Effects of Glycyrrhizic Acid on the Accumulation of Advanced Glycation End Product and Its Receptor Expression. NATURAL PRODUCTS AND BIOPROSPECTING 2014; 4:325-333. [PMID: 25369772 PMCID: PMC4250570 DOI: 10.1007/s13659-014-0044-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2014] [Accepted: 10/30/2014] [Indexed: 05/29/2023]
Abstract
Beneficial effects of glycyrrhizic acid (GA), a bioactive extract of licorice root, in the prevention of metabolic syndrome have been consistently reported while advanced glycation end products (AGE) and receptor for advanced glycation end product (RAGE) are the leading factors in the development of diabetes mellitus. The aim of this study was to investigate the effects of GA on the AGE-RAGE axis using high-fat/high-sucrose (HF/HS) diet-induced metabolic syndrome rat models. Twenty four male Sprague-Dawley rats were randomly assigned into three groups for 4 weeks: (1) Group A, normal diet with standard rat chow; (2) Group B, HF/HS diet; (3) Group C, HF/HS diet and oral administration of 100 mg/kg GA per day. The results showed that HF/HS diet elevated the fasting blood glucose level and insulin resistance index which was prevented by GA supplementation. GA treatment significantly lowered the circulating AGE independent of its glucose-lowering effect. HF/HS diet also triggered RAGE upregulation in the abdominal muscles while GA administration downregulated RAGE expression in the abdominal muscles, aorta and subcutaneous adipose tissues. In conclusion, HF/HS diet could cause glucose intolerance, insulin resistance and upregulation of RAGE expression while GA ameliorated the metabolic dysregulation besides exhibiting inhibitory effects on the AGE-RAGE axis.
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Affiliation(s)
- Hong Sheng Cheng
- School of Science, Monash University Malaysia, 46150 Bandar Sunway, Selangor, Malaysia.
| | | | - Athena Xin Hui Ng
- School of Science, Monash University Malaysia, 46150 Bandar Sunway, Selangor, Malaysia
| | - Weng Keong Chan
- School of Science, Monash University Malaysia, 46150 Bandar Sunway, Selangor, Malaysia
| | - So Ha Ton
- School of Science, Monash University Malaysia, 46150 Bandar Sunway, Selangor, Malaysia
| | - Khalid Abdul Kadir
- School of Medicine and Health Sciences, Monash University Malaysia, 46150 Bandar Sunway, Selangor, Malaysia
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Atawodi SEO, Yakubu OE, Liman ML, Iliemene DU. Effect of methanolic extract of Tetrapleura tetraptera (Schum and Thonn) Taub leaves on hyperglycemia and indices of diabetic complications in alloxan-induced diabetic rats. Asian Pac J Trop Biomed 2014; 4:272-8. [PMID: 25182550 DOI: 10.12980/apjtb.4.2014c73] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2013] [Accepted: 02/18/2014] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVE To investigate the ameliorative role of Tetrapleura tetraptera (Schum and Thonn) Taub (T. tetraptera) leaf in hyperglycemia with associated conditions like oxidative stress, kidney damage and disorders in lipid metabolism. METHODS Five groups of five rats each intraperitoneally received the following treatment schedules for 7 d: untreated normal control, untreated alloxan-diabetic control, diabetic treated with glibenclamide, normal rats treated with extract (50 mg/kg) and diabetic rats treated with the extract. Evaluations were made for fasting blood sugar, body weight changes, malondialdehyde, aspartate aminotransferase, alanine aminotransferase, bilirubin, superoxide dismutase, catalase, lipid profile, packed cell volume, hemoglobin, urea and creatinine in all the rats. RESULTS Whereas the untreated diabetic rats showed a significant decrease (P<0.05) in packed cell volume, superoxide dismutase, catalase and high-density lipoprotein-cholesterol with a concomitant increase in the levels of malondialdehyde, fasting blood sugar, aspartate aminotransferase, alanine aminotransferase, bilirubin, urea and creatinine, administration of methanolic extract of T. tetraptera leaf or glibenclamide alleviated these altered parameters in the treated rats. CONCLUSIONS Methanolic extract of T. tetraptera leaves possesses a potent capacity for treatment of diabetes and the accompanying complications, including oxidative stress and hyperlipidemia.
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Koka S, Aluri HS, Xi L, Lesnefsky EJ, Kukreja RC. Chronic inhibition of phosphodiesterase 5 with tadalafil attenuates mitochondrial dysfunction in type 2 diabetic hearts: potential role of NO/SIRT1/PGC-1α signaling. Am J Physiol Heart Circ Physiol 2014; 306:H1558-68. [PMID: 24727492 DOI: 10.1152/ajpheart.00865.2013] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Enhanced nitric oxide (NO) production is known to activate silent information regulator 1 (SIRT1), which is a histone deacetylase that regulates PGC-1α, a regulator of mitochondrial biogenesis and coactivator of transcription factors impacting energy homeostasis. Since phosphodiesterase-5 inhibitors potentiate NO signaling, we hypothesized that chronic treatment with phosphodiesterase-5 inhibitor tadalafil would activate SIRT1-PGC-1α signaling and protect against metabolic stress-induced mitochondrial dysfunction in diabetic hearts. Diabetic db/db mice (n = 32/group; 40 wk old) were randomized to receive DMSO (10%, 0.2 ml ip) or tadalafil (1 mg/kg ip in 10% DMSO) for 8 wk. Wild-type C57BL mice served as nondiabetic controls. The hearts were excised and homogenized to study SIRT1 activity and downstream protein targets. Mitochondrial function was determined by measuring oxidative phosphorylation (OXPHOS), and reactive oxygen species generation was studied in isolated mitochondria. Tadalafil-treated diabetic mice demonstrated significantly improved left ventricular function, which is associated with increased cardiac SIRT1 activity. Tadalafil also enhanced plasma NO oxidation levels, myocardial SIRT1, PGC-1α expression, and phosphorylation of eNOS, Akt, and AMPK in the diabetic hearts. OXPHOS with the complex I substrate glutamate was decreased by 50% in diabetic hearts compared with the nondiabetic controls. Tadalafil protected OXPHOS with an improved glutamate state 3 respiration rates. The increased reactive oxygen species production from complex I was significantly decreased by tadalafil treatment. In conclusion, chronic treatment with tadalafil activates NO-induced SIRT1-PGC-1α signaling and attenuates mitochondrial dysfunction in type 2 diabetic hearts.
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Affiliation(s)
- Saisudha Koka
- Division of Cardiology, Department of Internal Medicine, Pauley Heart Center, Virginia Commonwealth University, Richmond, Virginia
| | - Hema S Aluri
- Division of Cardiology, Department of Internal Medicine, Pauley Heart Center, Virginia Commonwealth University, Richmond, Virginia; Department of Physiology and Biophysics, Virginia Commonwealth University, Richmond, Virginia
| | - Lei Xi
- Division of Cardiology, Department of Internal Medicine, Pauley Heart Center, Virginia Commonwealth University, Richmond, Virginia
| | - Edward J Lesnefsky
- Division of Cardiology, Department of Internal Medicine, Pauley Heart Center, Virginia Commonwealth University, Richmond, Virginia; Cardiology Section, Medical Service, McGuire Veterans Affairs Medical Center, Richmond, Virginia; and Department of Physiology and Biophysics, Virginia Commonwealth University, Richmond, Virginia
| | - Rakesh C Kukreja
- Division of Cardiology, Department of Internal Medicine, Pauley Heart Center, Virginia Commonwealth University, Richmond, Virginia; Department of Physiology and Biophysics, Virginia Commonwealth University, Richmond, Virginia
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Liu CT, Hsu TW, Chen KM, Tan YP, Lii CK, Sheen LY. The Antidiabetic Effect of Garlic Oil is Associated with Ameliorated Oxidative Stress but Not Ameliorated Level of Pro-inflammatory Cytokines in Skeletal Muscle of Streptozotocin-induced Diabetic Rats. J Tradit Complement Med 2014; 2:135-44. [PMID: 24716126 PMCID: PMC3942916 DOI: 10.1016/s2225-4110(16)30087-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Oxidative stress and inflammatory condition has been broadly accepted being associated with the progression of diabetes. On the other hand, garlic (大蒜 dà suàn, bulb of Allium sativum) has been shown to possess both antioxidant and anti-inflammatory action in several clinical conditions. Our previous study demonstrated that treatment with garlic oil improves oral glucose tolerance and insulin tolerance and improves the insulin-stimulated utilization of glucose to synthesize glycogen in skeletal muscle in streptozotocin (STZ)-induced diabetes, in vivo and ex vivo, respectively. The aim of the present study is to investigate the antioxidant and anti-inflammatory effects of garlic oil (GO) in the skeletal muscle of diabetic rats. Rats with STZ-induced diabetes received GO (10, 50, or 100 mg/kg body weight) or corn oil by gavage every other day for 3 weeks. Control rats received corn oil only. GO dose-dependently improved insulin sensitivity, as assessed by the insulin tolerance test, and oral glucose tolerance. GO significantly elevated total glutathione and glutathione peroxidase activity and lowered the nitrate/nitrite content in skeletal muscle at 50 and 100 mg/kg and significantly elevated glutathione reductase activity and lowered lipid peroxidation at 100 mg/kg. By contrast, GO did not reverse diabetes-induced elevation of IL-1β and TNF-α in skeletal muscle at any tested dose. On the other hand, GO elevated the expression of GLUT4 in skeletal muscle along with glycogen content as observed with PAS staining. In conclusion, the antidiabetic effect of garlic oil is associated with ameliorated oxidative stress in skeletal muscle.
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Affiliation(s)
- Cheng-Tzu Liu
- School of Nutrition, Chung Shan Medical University, Taichung 402, Taiwan ; Department of Nutrition, Chung Shan Medical University Hospital, Taichung 402, Taiwan
| | - Tien-Wei Hsu
- School of Nutrition, Chung Shan Medical University, Taichung 402, Taiwan
| | - Ke-Ming Chen
- Department of Parasitology, Chung Shan Medical University, Taichung 402, Taiwan
| | - Ya-Ping Tan
- School of Nutrition, Chung Shan Medical University, Taichung 402, Taiwan
| | - Chong-Kuei Lii
- Department of Nutrition, China Medical University, Taichung 404, Taiwan
| | - Lee-Yan Sheen
- Graduate Institute of Food Science and Technology, National Taiwan University, Taipei, Taiwan
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Masoumipoor M, Jameie SB, Janzadeh A, Nasirinezhad F, Soleimani M, Kerdary M. Effects of 660- and 980-nm low-level laser therapy on neuropathic pain relief following chronic constriction injury in rat sciatic nerve. Lasers Med Sci 2014; 29:1593-8. [DOI: 10.1007/s10103-014-1552-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2013] [Accepted: 02/18/2014] [Indexed: 01/05/2023]
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Mason S, Wadley GD. Skeletal muscle reactive oxygen species: a target of good cop/bad cop for exercise and disease. Redox Rep 2014; 19:97-106. [PMID: 24620937 DOI: 10.1179/1351000213y.0000000077] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Metabolic stresses associated with disease, ageing, and exercise increase the levels of reactive oxygen species (ROS) in skeletal muscle. These ROS have been linked mechanistically to adaptations in skeletal muscle that can be favourable (i.e. in response to exercise) or detrimental (i.e. in response to disease). The magnitude, duration (acute versus chronic), and cellular origin of the ROS are important underlying factors in determining the metabolic perturbations associated with the ROS produced in skeletal muscle. In particular, insulin resistance has been linked to excess ROS production in skeletal muscle mitochondria. A chronic excess of mitochondrial ROS can impair normal insulin signalling pathways and glucose disposal in skeletal muscle. In contrast, ROS produced in skeletal muscle in response to exercise has been linked to beneficial metabolic adaptations including mitochondrial biogenesis and muscle hypertrophy. Moreover, unlike insulin resistance, exercise-induced ROS appears to be primarily of non-mitochondrial origin. The present review summarizes the diverse ROS-targeted metabolic outcomes associated with insulin resistance versus exercise in skeletal muscle, thus, presenting two contrasting perspectives of pathologically harmful versus physiologically beneficial ROS. Here, we discuss the key sites of ROS production during exercise and the effect of ROS in skeletal muscle of people with type 2 diabetes.
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Baldelli S, Lettieri Barbato D, Tatulli G, Aquilano K, Ciriolo MR. The role of nNOS and PGC-1α in skeletal muscle cells. J Cell Sci 2014; 127:4813-20. [DOI: 10.1242/jcs.154229] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Neuronal nitric oxide synthase (nNOS) and peroxisome proliferator activated receptor γ co-activator 1α (PGC-1α) are two fundamental factors involved in the regulation of skeletal muscle cell metabolism. nNOS exists as several alternatively spliced variants, each having a specific pattern of subcellular localisation. Nitric oxide (NO) functions as a second messenger in signal transduction pathways that lead to the expression of metabolic genes involved in oxidative metabolism, vasodilatation and skeletal muscle contraction. PGC-1α is a transcriptional coactivator and represents a master regulator of mitochondrial biogenesis by promoting the transcription of mitochondrial genes. PGC-1α can be induced during physical exercise, and it plays a key role in coordinating the oxidation of intracellular fatty acids with mitochondrial remodelling. Several lines of evidence demonstrate that NO could act as a key regulator of PGC-1α expression; however, the link between nNOS and PGC-1α in skeletal muscle remains only poorly understood. In this Commentary, we review important metabolic pathways that are governed by nNOS and PGC-1α, and aim to highlight how they might intersect and cooperatively regulate skeletal muscle mitochondrial and lipid energetic metabolism and contraction.
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Mezghenna K, Leroy J, Azay-Milhau J, Tousch D, Castex F, Gervais S, Delgado-Betancourt V, Gross R, Lajoix AD. Counteracting neuronal nitric oxide synthase proteasomal degradation improves glucose transport in insulin-resistant skeletal muscle from Zucker fa/fa rats. Diabetologia 2014; 57:177-86. [PMID: 24186360 DOI: 10.1007/s00125-013-3084-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Accepted: 09/30/2013] [Indexed: 12/18/2022]
Abstract
AIMS/HYPOTHESIS Insulin-mediated glucose transport and utilisation are decreased in skeletal muscle from type 2 diabetic and glucose-intolerant individuals because of alterations in insulin receptor signalling, GLUT4 translocation to the plasma membrane and microvascular blood flow. Catalytic activity of the muscle-specific isoform of neuronal nitric oxide synthase (nNOS) also participates in the regulation of glucose transport and appears to be decreased in a relevant animal model of drastic insulin resistance, the obese Zucker fa/fa rat. Our objective was to determine the molecular mechanisms involved in this defect. METHODS Isolated rat muscles and primary cultures of myocytes were used for western blot analysis of protein expression, immunohistochemistry, glucose uptake measurements and GLUT4 translocation assays. RESULTS nNOS expression was reduced in skeletal muscle from fa/fa rats. This was caused by increased ubiquitination of the enzyme and subsequent degradation by the ubiquitin proteasome pathway. The degradation occurred through a greater interaction of nNOS with the chaperone heat-shock protein 70 and the co-chaperone, carboxyl terminus of Hsc70-interacting protein (CHIP). In addition, an alteration in nNOS sarcolemmal localisation was observed. We confirmed the implication of nNOS breakdown in defective insulin-induced glucose transport by demonstrating that blockade of proteasomal degradation or overexpression of nNOS improved basal and/or insulin-stimulated glucose uptake and GLUT4 translocation in primary cultures of insulin-resistant myocytes. CONCLUSIONS/INTERPRETATION Recovery of nNOS in insulin-resistant muscles should be considered a potential new approach to address insulin resistance.
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Affiliation(s)
- Karima Mezghenna
- Centre for Pharmacology and Innovation in Diabetes, University Montpellier 1, EA 7288, 15 Avenue Charles Flahault, BP 14491, 34093, Montpellier cedex 5, France
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Eghbalzadeh K, Brixius K, Bloch W, Brinkmann C. Skeletal muscle nitric oxide (NO) synthases and NO-signaling in "diabesity"--what about the relevance of exercise training interventions? Nitric Oxide 2013; 37:28-40. [PMID: 24368322 DOI: 10.1016/j.niox.2013.12.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 10/30/2013] [Accepted: 12/17/2013] [Indexed: 12/30/2022]
Abstract
Type 2 diabetes mellitus associated with obesity, or "diabesity", coincides with an altered nitric oxide (NO) metabolism in skeletal muscle. Three isoforms of nitric oxide synthase (NOS) exist in human skeletal muscle tissue. Both neuronal nitric oxide synthase (nNOS) and endothelial nitric oxide synthase (eNOS) are constitutively expressed under physiological conditions, producing low levels of NO, while the inducible nitric oxide synthase (iNOS) is strongly up-regulated only under pathophysiological conditions, excessively increasing NO concentrations. Due to chronic inflammation, overweight/obese type 2 diabetic patients exhibit up-regulated protein contents of iNOS and concomitant elevated amounts of NO in skeletal muscle. Low muscular NO levels are important for attaining an adequate cellular redox state--thereby maintaining metabolic integrity--while high NO levels are believed to destroy cellular components and to disturb metabolic processes, e.g., through strongly augmented posttranslational protein S-nitrosylation. Physical training with submaximal intensity has been shown to attenuate inflammatory profiles and iNOS protein contents in the long term. The present review summarizes signaling pathways which induce iNOS up-regulation under pathophysiological conditions and describes molecular mechanisms by which high NO concentrations are likely to contribute to triggering skeletal muscle insulin resistance and to reducing mitochondrial capacity during the development and progression of type 2 diabetes. Based on this information, it discusses the beneficial effects of regular physical exercise on the altered NO metabolism in the skeletal muscle of overweight/obese type 2 diabetic subjects, thus unearthing new perspectives on training strategies for this particular patient group.
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Affiliation(s)
- Kaveh Eghbalzadeh
- Department of Molecular and Cellular Sport Medicine, Institute of Cardiovascular Research and Sport Medicine, German Sport University Cologne, Germany
| | - Klara Brixius
- Department of Molecular and Cellular Sport Medicine, Institute of Cardiovascular Research and Sport Medicine, German Sport University Cologne, Germany
| | - Wilhelm Bloch
- Department of Molecular and Cellular Sport Medicine, Institute of Cardiovascular Research and Sport Medicine, German Sport University Cologne, Germany
| | - Christian Brinkmann
- Department of Molecular and Cellular Sport Medicine, Institute of Cardiovascular Research and Sport Medicine, German Sport University Cologne, Germany.
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Aoi W, Naito Y, Yoshikawa T. Role of oxidative stress in impaired insulin signaling associated with exercise-induced muscle damage. Free Radic Biol Med 2013; 65:1265-1272. [PMID: 24075894 DOI: 10.1016/j.freeradbiomed.2013.09.014] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 09/18/2013] [Accepted: 09/19/2013] [Indexed: 10/26/2022]
Abstract
Skeletal muscle is a major tissue that utilizes blood glucose. A single bout of exercise improves glucose uptake in skeletal muscle through insulin-dependent and insulin-independent signal transduction mechanisms. However, glucose utilization is decreased in muscle damage induced by acute, unaccustomed, or eccentric exercise. The decrease in glucose utilization is caused by decreased insulin-stimulated glucose uptake in damaged muscles with inhibition of the membrane translocation of glucose transporter 4 through phosphatidyl 3-kinase/Akt signaling. In addition to inflammatory cytokines, reactive oxygen species including 4-hydroxy-2-nonenal and peroxynitrate can induce degradation or inactivation of signaling proteins through posttranslational modification, thereby resulting in a disturbance in insulin signal transduction. In contrast, treatment with factors that attenuate oxidative stress in damaged muscle suppresses the impairment of insulin sensitivity. Muscle-damaging exercise may thus lead to decreased endurance capacity and muscle fatigue in exercise, and it may decrease the efficiency of exercise therapy for metabolic improvement.
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Affiliation(s)
- Wataru Aoi
- Laboratory of Health Science, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto 606-8522, Japan.
| | - Yuji Naito
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan
| | - Toshikazu Yoshikawa
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan
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Effects of 660 nm Low Level Laser Therapy on Neuropathic Pain Relief Following Chronic Constriction Injury in Rat Sciatic Nerve. ARCHIVES OF NEUROSCIENCE 2013. [DOI: 10.5812/archneurosci.13740] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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50
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Marzetti E, Calvani R, DuPree J, Lees HA, Giovannini S, Seo DO, Buford TW, Sweet K, Morgan D, Strehler KYE, Diz D, Borst SE, Moningka N, Krotova K, Carter CS. Late-life enalapril administration induces nitric oxide-dependent and independent metabolic adaptations in the rat skeletal muscle. AGE (DORDRECHT, NETHERLANDS) 2013; 35:1061-75. [PMID: 22639176 PMCID: PMC3705103 DOI: 10.1007/s11357-012-9428-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Accepted: 05/09/2012] [Indexed: 05/29/2023]
Abstract
Recently, we showed that administration of the angiotensin-converting enzyme inhibitor enalapril to aged rats attenuated muscle strength decline and mitigated apoptosis in the gastrocnemius muscle. The aim of the present study was to investigate possible mechanisms underlying the muscle-protective effects of enalapril. We also sought to discern the effects of enalapril mediated by nitric oxide (NO) from those independent of this signaling molecule. Eighty-seven male Fischer 344 × Brown Norway rats were randomly assigned to receive enalapril (n = 23), the NO synthase (NOS) inhibitor N(G)-nitro-L-arginine methyl ester (L-NAME; n = 22), enalapril + L-NAME (n = 19), or placebo (n = 23) from 24 to 27 months of age. Experiments were performed on the tibialis anterior muscle. Total NOS activity and the expression of neuronal, endothelial, and inducible NOS isoforms (nNOS, eNOS, and iNOS) were determined to investigate the effects of enalapril on NO signaling. Transcript levels of tumor necrosis factor-alpha (TNF-α) and peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α) were assessed to explore actions of enalapril on inflammation and mitochondrial biogenesis, respectively. Protein expression of energy-sensing and insulin signaling mediators, including protein kinase B (Akt-1), phosphorylated Akt-1 (pAkt-1), mammalian target of rapamycin (mTOR), AMP-activated protein kinase subunit alpha (AMPKα), phosphorylated AMPKα (pAMPKα), and the glucose transporter GLUT-4, was also determined. Finally, the generation of hydrogen peroxide (H2O2) was quantified in subsarcolemmal (SSM) and intermyofibrillar (IFM) mitochondria. Enalapril increased total NOS activity, which was prevented by L-NAME co-administration. eNOS protein content was enhanced by enalapril, but not by enalapril + L-NAME. Gene expression of iNOS was down-regulated by enalapril either alone or in combination with L-NAME. In contrast, protein levels of nNOS were unaltered by treatments. The mRNA abundance of TNF-α was reduced by enalapril relative to placebo, with no differences among any other group. PCG-1α gene expression was unaffected by enalapril and lowered by enalapril + L-NAME. No differences in protein expression of Akt-1, pAkt-1, AMPKα, pAMPKα, or GLUT-4 were detected among groups. However, mTOR protein levels were increased by enalapril compared with placebo. Finally, all treatment groups displayed reduced SSM, but not IFM H2O2 production relative to placebo. Our data indicate that enalapril induces a number of metabolic adaptations in aged skeletal muscle. These effects result from the concerted modulation of NO and angiotensin II signaling, rather than from a dichotomous action of enalapril on the two pathways. Muscle protection by enalapril administered late in life appears to be primarily mediated by mitigation of oxidative stress and pro-inflammatory signaling.
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Affiliation(s)
- Emanuele Marzetti
- />Department of Aging and Geriatric Research, Institute on Aging, University of Florida, PO Box 100143, Gainesville, FL 32610-0143 USA
- />Department of Geriatrics, Neurology and Orthopedics, Catholic University of the Sacred Heart, Rome, 00168 Italy
| | - Riccardo Calvani
- />Department of Geriatrics, Neurology and Orthopedics, Catholic University of the Sacred Heart, Rome, 00168 Italy
- />Institute of Crystallography, National Research Council (CNR), Bari, 70126 Italy
| | - Jameson DuPree
- />Department of Aging and Geriatric Research, Institute on Aging, University of Florida, PO Box 100143, Gainesville, FL 32610-0143 USA
| | - Hazel A. Lees
- />Department of Aging and Geriatric Research, Institute on Aging, University of Florida, PO Box 100143, Gainesville, FL 32610-0143 USA
| | - Silvia Giovannini
- />Department of Aging and Geriatric Research, Institute on Aging, University of Florida, PO Box 100143, Gainesville, FL 32610-0143 USA
- />Department of Geriatrics, Neurology and Orthopedics, Catholic University of the Sacred Heart, Rome, 00168 Italy
| | - Dong-oh Seo
- />Department of Aging and Geriatric Research, Institute on Aging, University of Florida, PO Box 100143, Gainesville, FL 32610-0143 USA
| | - Thomas W. Buford
- />Department of Aging and Geriatric Research, Institute on Aging, University of Florida, PO Box 100143, Gainesville, FL 32610-0143 USA
| | - Kindal Sweet
- />Department of Aging and Geriatric Research, Institute on Aging, University of Florida, PO Box 100143, Gainesville, FL 32610-0143 USA
| | - Drake Morgan
- />Department of Psychiatry, University of Florida, Gainesville, FL 32610 USA
| | - Kevin Y. E. Strehler
- />Department of Pharmacology and Therapeutics, University of Florida, Gainesville, FL 32610 USA
| | - Debra Diz
- />Department of General Surgery, Hypertension and Vascular Research Center, Wake Forest University School of Medicine, Winston-Salem, NC USA
| | - Stephen E. Borst
- />Department of Applied Kinesiology and VA Medical Center Geriatric Research, Education and Clinical Center, University of Florida, Gainesville, FL 32608 USA
| | - Natasha Moningka
- />Department of Physiology and Functional Genomics, University of Florida’s Hypertension Center, Gainesville, FL 32610 USA
| | - Karina Krotova
- />Department of Medicine, University of Florida, Gainesville, FL 32610 USA
| | - Christy S. Carter
- />Department of Aging and Geriatric Research, Institute on Aging, University of Florida, PO Box 100143, Gainesville, FL 32610-0143 USA
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