1
|
Hajimohammadi S, Rameshrad M, Karimi G. Exploring the therapeutic effects of sulforaphane: an in-depth review on endoplasmic reticulum stress modulation across different disease contexts. Inflammopharmacology 2024; 32:2185-2201. [PMID: 38922526 DOI: 10.1007/s10787-024-01506-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Accepted: 06/06/2024] [Indexed: 06/27/2024]
Abstract
The endoplasmic reticulum (ER) is an intracellular organelle that contributes to the folding of proteins and calcium homeostasis. Numerous elements can disrupt its function, leading to the accumulation of proteins that are unfolded or misfolded in the lumen of the ER, a condition that is known as ER stress. This phenomenon can trigger cell death through the activation of apoptosis and inflammation. Glucoraphanin (GRA) is the predominant glucosinolate found in cruciferous vegetables. Various mechanical and biochemical processes activate the enzyme myrosinase, leading to the hydrolysis of glucoraphanin into the bioactive compound sulforaphane. Sulforaphane is an organosulfur compound that belongs to the isothiocyanate group. It possesses a wide range of activities and has shown remarkable potential as an anti-inflammatory, antioxidant, antitumor, and anti-angiogenic substance. Additionally, sulforaphane is resistant to oxidation, has been demonstrated to have low toxicity, and is considered well-tolerable in individuals. These properties make it a valuable natural dietary supplement for research purposes. Sulforaphane has been demonstrated as a potential candidate drug molecule for managing a range of diseases, primarily because of its potent antioxidant, anti-inflammatory, and anti-apoptotic properties, which can be mediated by modulation of ER stress pathways. This review seeks to cover a wealth of data supporting the broad range of protective functions of sulforaphane, improving various diseases, such as cardiovascular, central nervous system, liver, eye, and reproductive diseases, as well as diabetes, cancer, gastroenteritis, and osteoarthritis, through the amelioration of ER stress in both in vivo and in vitro studies.
Collapse
Affiliation(s)
- Samaneh Hajimohammadi
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
- Student Research Committee, Mashhad University of Medical Science, Mashhad, Iran
| | - Maryam Rameshrad
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Gholamreza Karimi
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.
- Pharmaceutical Research Center, Pharmaceutical Research Institute, Mashhad University of Medical Science, Mashhad, Iran.
| |
Collapse
|
2
|
Yan K. Recent advances in the effect of adipose tissue inflammation on insulin resistance. Cell Signal 2024; 120:111229. [PMID: 38763181 DOI: 10.1016/j.cellsig.2024.111229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 05/13/2024] [Accepted: 05/14/2024] [Indexed: 05/21/2024]
Abstract
Obesity is one of the major risk factors for diabetes. Excessive accumulation of fat leads to inflammation of adipose tissue, which can increase the risk of developing diabetes. Obesity-related chronic inflammation can result in anomalies in glucose-lipid metabolism and insulin resistance, and it is a major cause of β-cell dysfunction in diabetes mellitus. Thus, a long-term tissue inflammatory response is crucial for metabolic diseases, particularly type 2 diabetes. Chronic inflammation associated with obesity increases oxidative stress, secretes inflammatory factors, modifies endocrine variables, and interferes with insulin signalling pathways, all of which contribute to insulin resistance and glucose tolerance. Insulin resistance and diabetes are ultimately caused by chronic inflammation in the stomach, pancreas, liver, muscle, and fat tissues. In this article, we systematically summarize the latest research progress on the mechanisms of adipose tissue inflammation and insulin resistance, as well as the mechanisms of cross-talk between adipose tissue inflammation and insulin resistance, with a view to providing some meaningful therapeutic strategies for the treatment of insulin resistance by controlling adipose tissue inflammation.
Collapse
Affiliation(s)
- Kaiyi Yan
- The Second Clinical College of China Medical University, Shenyang, Liaoning 110122, China.
| |
Collapse
|
3
|
Chatterjee B, Fatima F, Seth S, Sinha Roy S. Moderate Elevation of Homocysteine Induces Endothelial Dysfunction through Adaptive UPR Activation and Metabolic Rewiring. Cells 2024; 13:214. [PMID: 38334606 PMCID: PMC10854856 DOI: 10.3390/cells13030214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 11/25/2023] [Indexed: 02/10/2024] Open
Abstract
Elevation of the intermediate amino acid metabolite Homocysteine (Hcy) causes Hyperhomocysteinemia (HHcy), a metabolic disorder frequently associated with mutations in the methionine-cysteine metabolic cycle as well as with nutritional deficiency and aging. The previous literature suggests that HHcy is a strong risk factor for cardiovascular diseases. Severe HHcy is well-established to correlate with vascular pathologies primarily via endothelial cell death. Though moderate HHcy is more prevalent and associated with an increased risk of cardiovascular abnormalities in later part of life, its precise role in endothelial physiology is largely unknown. In this study, we report that moderate elevation of Hcy causes endothelial dysfunction through impairment of their migration and proliferation. We established that unlike severe elevation of Hcy, moderate HHcy is not associated with suppression of endothelial VEGF/VEGFR transcripts and ROS induction. We further showed that moderate HHcy induces a sub-lethal ER stress that causes defective endothelial migration through abnormal actin cytoskeletal remodeling. We also found that sub-lethal increase in Hcy causes endothelial proliferation defect by suppressing mitochondrial respiration and concomitantly increases glycolysis to compensate the consequential ATP loss and maintain overall energy homeostasis. Finally, analyzing a previously published microarray dataset, we confirmed that these hallmarks of moderate HHcy are conserved in adult endothelial cells as well. Thus, we identified adaptive UPR and metabolic rewiring as two key mechanistic signatures in moderate HHcy-associated endothelial dysfunction. As HHcy is clinically associated with enhanced vascular inflammation and hypercoagulability, identifying these mechanistic pathways may serve as future targets to regulate endothelial function and health.
Collapse
Affiliation(s)
- Barun Chatterjee
- CSIR-Institute of Genomics & Integrative Biology, New Delhi 110025, India; (B.C.); (F.F.); (S.S.)
- Academy of Scientific & Innovative Research, Ghaziabad 201002, India
| | - Fabeha Fatima
- CSIR-Institute of Genomics & Integrative Biology, New Delhi 110025, India; (B.C.); (F.F.); (S.S.)
| | - Surabhi Seth
- CSIR-Institute of Genomics & Integrative Biology, New Delhi 110025, India; (B.C.); (F.F.); (S.S.)
- Academy of Scientific & Innovative Research, Ghaziabad 201002, India
| | - Soumya Sinha Roy
- CSIR-Institute of Genomics & Integrative Biology, New Delhi 110025, India; (B.C.); (F.F.); (S.S.)
- Academy of Scientific & Innovative Research, Ghaziabad 201002, India
| |
Collapse
|
4
|
Gawargi FI, Mishra PK. Ironing out the details: ferroptosis and its relevance to diabetic cardiomyopathy. Am J Physiol Regul Integr Comp Physiol 2023; 325:R665-R681. [PMID: 37746707 PMCID: PMC11178299 DOI: 10.1152/ajpregu.00117.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 09/05/2023] [Accepted: 09/14/2023] [Indexed: 09/26/2023]
Abstract
Ferroptosis is a newly identified myocardial cell death mechanism driven by iron-dependent lipid peroxidation. The presence of elevated intramyocardial lipid levels and excessive iron in patients with diabetes suggest a predominant role of ferroptosis in diabetic cardiomyopathy. As myocardial cell death is a precursor of heart failure, and intensive glycemic control cannot abate the increased risk of heart failure in patients with diabetes, targeting myocardial cell death via ferroptosis is a promising therapeutic avenue to prevent and/or treat diabetic cardiomyopathy. This review provides updated and comprehensive molecular mechanisms underpinning ferroptosis, clarifies several misconceptions about ferroptosis, emphasizes the importance of ferroptosis in diabetes-induced myocardial cell death, and offers valuable approaches to evaluate and target ferroptosis in the diabetic heart. Furthermore, basic concepts and ideas presented in this review, including glutathione peroxidase-4-independent and mitochondrial mechanisms of ferroptosis, are also important for investigating ferroptosis in other diabetic organs, as well as nondiabetic and metabolically compromised hearts.
Collapse
Affiliation(s)
- Flobater I Gawargi
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, Nebraska, United States
| | - Paras K Mishra
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, Nebraska, United States
| |
Collapse
|
5
|
Tang Q, Liu M, Zhao H, Chen L. Glycogen-binding protein STBD1: Molecule and role in pathophysiology. J Cell Physiol 2023; 238:2010-2025. [PMID: 37435888 DOI: 10.1002/jcp.31078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 06/19/2023] [Accepted: 06/23/2023] [Indexed: 07/13/2023]
Abstract
Starch-binding domain-containing protein 1 (STBD1) is a glycogen-binding protein discovered in skeletal muscle gene differential expression that is pivotal to cellular energy metabolism. Recent studies have indicated that STBD1 is involved in many physiological processes, such as glycophagy, glycogen accumulation, and lipid droplet formation. Moreover, dysregulation of STBD1 causes multiple diseases, including cardiovascular disease, metabolic disease, and even cancer. Deletions and/or mutations in STBD1 promote tumorigenesis. Therefore, STBD1 has garnered considerable interest in the pathology community. In this review, we first summarized the current understanding of STBD1, including its structure, subcellular localization, tissue distribution, and biological functions. Next, we examined the roles and molecular mechanisms of STBD1 in related diseases. Based on available research, we discussed the novel function and future of STBD1, including its potential application as a therapeutic target in glycogen-related diseases. Given the significance of STBD1 in energy metabolism, an in-depth understanding of the protein is crucial for understanding physiological processes and developing therapeutic strategies for related diseases.
Collapse
Affiliation(s)
- Qiannan Tang
- Hunan Provincial Key Laboratory of Tumor Microenvironment Responsive Drug Research, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy and Pharmacology, Hengyang Medical School, University of South China, Hengyang, China
| | - Meiqing Liu
- Key Laboratory of Cardiovascular Diseases of Yunnan Province, Key Laboratory of Tumor Immunological Prevention and Treatment of Yunnan Province, Central Laboratory of Yan'an Hospital Affiliated to Kunming Medical University, Kunming, China
| | - Hong Zhao
- Nursing College, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Linxi Chen
- Hunan Provincial Key Laboratory of Tumor Microenvironment Responsive Drug Research, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy and Pharmacology, Hengyang Medical School, University of South China, Hengyang, China
| |
Collapse
|
6
|
Bravo-Sagua R, Lopez-Crisosto C, Criollo A, Inagi R, Lavandero S. Organelle Communication: Joined in Sickness and in Health. Physiology (Bethesda) 2023; 38:0. [PMID: 36856309 DOI: 10.1152/physiol.00024.2022] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023] Open
Abstract
Organelles are membrane-lined structures that compartmentalize subcellular biochemical functions. Therefore, interorganelle communication is crucial for cellular responses that require the coordination of such functions. Multiple principles govern interorganelle interactions, which arise from the complex nature of organelles: position, multilingualism, continuity, heterogeneity, proximity, and bidirectionality, among others. Given their importance, alterations in organelle communication have been linked to many diseases. Among the different types of contacts, endoplasmic reticulum mitochondria interactions are the best known; however, mounting evidence indicates that other organelles also have something to say in the pathophysiological conversation.
Collapse
Affiliation(s)
- Roberto Bravo-Sagua
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Pharmaceutical and Chemical Sciences and Faculty of Medicine, Universidad de Chile, Santiago, Chile.,Laboratory of Obesity and Metabolism (OMEGA), Institute of Nutrition and Food Technology (INTA), Universidad de Chile, Santiago, Chile.,Interuniversity Center for Healthy Aging (CIES), Consortium of Universities of the State of Chile (CUECH), Santiago, Chile
| | - Camila Lopez-Crisosto
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Pharmaceutical and Chemical Sciences and Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Alfredo Criollo
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Pharmaceutical and Chemical Sciences and Faculty of Medicine, Universidad de Chile, Santiago, Chile.,Cellular and Molecular Biology Laboratory, Institute in Dentistry Sciences, Dentistry Faculty, Universidad de Chile, Santiago, Chile
| | - Reiko Inagi
- Division of Chronic Kidney Disease Pathophysiology, The University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Sergio Lavandero
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Pharmaceutical and Chemical Sciences and Faculty of Medicine, Universidad de Chile, Santiago, Chile.,Department of Internal Medicine, Cardiology Division, University of Texas Southwestern Medical Center, Dallas, Texas, United States
| |
Collapse
|
7
|
Nieblas B, Pérez-Treviño P, García N. Role of mitochondria-associated endoplasmic reticulum membranes in insulin sensitivity, energy metabolism, and contraction of skeletal muscle. Front Mol Biosci 2022; 9:959844. [PMID: 36275635 PMCID: PMC9585326 DOI: 10.3389/fmolb.2022.959844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 08/04/2022] [Indexed: 11/29/2022] Open
Abstract
Skeletal muscle has a critical role in the regulation of the energy balance of the organism, particularly as the principal tissue responsible for insulin-stimulated glucose disposal and as the major site of peripheral insulin resistance (IR), which has been related to accumulation of lipid intermediates, reduced oxidative capacity of mitochondria and endoplasmic reticulum (ER) stress. These organelles form contact sites, known as mitochondria-associated ER membranes (MAMs). This interconnection seems to be involved in various cellular processes, including Ca2+ transport and energy metabolism; therefore, MAMs could play an important role in maintaining cellular homeostasis. Evidence suggests that alterations in MAMs may contribute to IR. However, the evidence does not refer to a specific subcellular location, which is of interest due to the fact that skeletal muscle is constituted by oxidative and glycolytic fibers as well as different mitochondrial populations that appear to respond differently to stimuli and pathological conditions. In this review, we show the available evidence of possible differential responses in the formation of MAMs in skeletal muscle as well as its role in insulin signaling and the beneficial effect it could have in the regulation of energetic metabolism and muscular contraction.
Collapse
Affiliation(s)
- Bianca Nieblas
- Escuela de Medicina y Ciencias de la Salud, Tecnologico de Monterrey, Monterrey, Nuevo León, México
- Experimental Medicine and Advanced Therapies, The Institute for Obesity Research, Tecnologico de Monterrey, Monterrey, Nuevo León, México
| | - Perla Pérez-Treviño
- Experimental Medicine and Advanced Therapies, The Institute for Obesity Research, Tecnologico de Monterrey, Monterrey, Nuevo León, México
| | - Noemí García
- Escuela de Medicina y Ciencias de la Salud, Tecnologico de Monterrey, Monterrey, Nuevo León, México
- Experimental Medicine and Advanced Therapies, The Institute for Obesity Research, Tecnologico de Monterrey, Monterrey, Nuevo León, México
- *Correspondence: Noemí García,
| |
Collapse
|
8
|
Ramaiah P, Patra I, Abbas A, Fadhil AA, Abohassan M, Al-Qaim ZH, Hameed NM, Al-Gazally ME, Kemil Almotlaq SS, Mustafa YF, Shiravand Y. Mitofusin-2 in cancer: Friend or foe? Arch Biochem Biophys 2022; 730:109395. [PMID: 36176224 DOI: 10.1016/j.abb.2022.109395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 08/30/2022] [Accepted: 09/07/2022] [Indexed: 11/19/2022]
Abstract
Cancer is a category of disorders characterized by excessive cell proliferation with the ability to infiltrate or disseminate to other organs of the body. Mitochondrial dysfunction, as one of the most prominent hallmarks of cancer cells, has been related to the onset and development of various cancers. Mitofusin 2 (MFN2) is a major mediator of mitochondrial fusion, endoplasmic reticulum (ER)-mitochondria interaction, mitophagy and axonal transport of mitochondria. Available data have shown that MFN2, which its alterations have been associated with mitochondrial dysfunction, could affect cancer initiation and progression. In fact, it showed that MFN2 may have a double-edged sword effect on cancer fate. Precisely, it demonstrated that MFN2, as a tumor suppressor, induces cancer cell apoptosis and inhibits cell proliferation via Ca2+ and Bax-mediated apoptosis and increases P21 and p27 levels, respectively. It also could suppress cell survival via inhibiting PI3K/Akt, Ras-ERK1/2-cyclin D1 and mTORC2/Akt signaling pathways. On the other hand, MFN2, as an oncogene, could increase cancer invasion via snail-mediated epithelial-mesenchymal transition (EMT) and in vivo tumorigenesis. While remarkable progress has been achieved in recent decades, further exploration is required to elucidate whether MFN2 could be a friend or it's an enemy. This study aimed to highlight the different functions of MFN2 in various cancers.
Collapse
Affiliation(s)
| | | | - Anum Abbas
- Basic Health Unit, Foundation University Medical College, Islamabad, Pakistan.
| | - Ali Abdulhussain Fadhil
- College of Medical Technology, Medical Lab Techniques, Al-farahidi University, Baghdad, Iraq
| | - Mohammad Abohassan
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, Abha, 9088, Saudi Arabia
| | | | | | | | | | - Yasser Fakri Mustafa
- Department of Pharmaceutical Chemistry, College of Pharmacy, University of Mosul, Mosul-41001, Iraq
| | - Yavar Shiravand
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80138, Naples, Italy.
| |
Collapse
|
9
|
Jin C, Felli E, Lange NF, Berzigotti A, Gracia-Sancho J, Dufour JF. Endoplasmic Reticulum and Mitochondria Contacts Correlate with the Presence and Severity of NASH in Humans. Int J Mol Sci 2022; 23:ijms23158348. [PMID: 35955482 PMCID: PMC9369179 DOI: 10.3390/ijms23158348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 07/25/2022] [Accepted: 07/25/2022] [Indexed: 11/17/2022] Open
Abstract
The interaction between the mitochondria and the endoplasmic reticulum (ER) is essential for hepatocyte function. An increase in ER–mitochondria contacts (ERMCs) is associated with various metabolic diseases. Non-alcoholic fatty liver disease (NAFLD) is associated with obesity and type 2 diabetes, and its progressive form non-alcoholic steatohepatitis (NASH) can lead to cirrhosis and hepatocellular carcinoma. However, the role of ERMCs in the progression of NAFL to NASH is still unclear. We assessed whether ERMCs could correlate with NAFLD severity. We used a proximity ligation assay to measure the abundance of ERMCs in liver biopsies from patients with biopsy-proven NAFLD (n = 48) and correlated the results with histological and metabolic syndrome (MetS) features. NAFLD patients were included according to inclusion and exclusion criteria, and then assigned to NAFL (n = 9) and NASH (n = 39) groups. ERMCs density could discriminate NASH from NAFL (sensitivity 61.5%, specificity 100%). ERMCs abundance correlated with hepatocellular ballooning. Moreover, the density of ERMCs increased with an increase in the number of MetS features. In conclusion, ERMCs increased from NAFL to NASH, in parallel with the number of MetS features, supporting a role for this interaction in the pathophysiology of NASH.
Collapse
Affiliation(s)
- Chaonan Jin
- Department of Visceral Surgery and Medicine, Inselspital, Bern University Hospital, University of Bern, 3012 Bern, Switzerland; (C.J.); (E.F.); (N.F.L.); (A.B.)
- Department for BioMedical Research, Hepatology, University of Bern, 3012 Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, 3012 Bern, Switzerland
| | - Eric Felli
- Department of Visceral Surgery and Medicine, Inselspital, Bern University Hospital, University of Bern, 3012 Bern, Switzerland; (C.J.); (E.F.); (N.F.L.); (A.B.)
- Department for BioMedical Research, Hepatology, University of Bern, 3012 Bern, Switzerland
| | - Naomi Franziska Lange
- Department of Visceral Surgery and Medicine, Inselspital, Bern University Hospital, University of Bern, 3012 Bern, Switzerland; (C.J.); (E.F.); (N.F.L.); (A.B.)
- Graduate School for Health Sciences, University of Bern, 3012 Bern, Switzerland
| | - Annalisa Berzigotti
- Department of Visceral Surgery and Medicine, Inselspital, Bern University Hospital, University of Bern, 3012 Bern, Switzerland; (C.J.); (E.F.); (N.F.L.); (A.B.)
- Department for BioMedical Research, Hepatology, University of Bern, 3012 Bern, Switzerland
| | - Jordi Gracia-Sancho
- Department of Visceral Surgery and Medicine, Inselspital, Bern University Hospital, University of Bern, 3012 Bern, Switzerland; (C.J.); (E.F.); (N.F.L.); (A.B.)
- Department for BioMedical Research, Hepatology, University of Bern, 3012 Bern, Switzerland
- Liver Vascular Biology Research Group, CIBEREHD, IDIBAPS Research Institute, 08036 Barcelona, Spain
- Correspondence: (J.G.-S.); (J.-F.D.)
| | - Jean-François Dufour
- Department for BioMedical Research, Hepatology, University of Bern, 3012 Bern, Switzerland
- Correspondence: (J.G.-S.); (J.-F.D.)
| |
Collapse
|
10
|
Kyriakoudi S, Theodoulou A, Potamiti L, Schumacher F, Zachariou M, Papacharalambous R, Kleuser B, Panayiotidis MI, Drousiotou A, Petrou PP. Stbd1-deficient mice display insulin resistance associated with enhanced hepatic ER-mitochondria contact. Biochimie 2022; 200:172-183. [PMID: 35691532 DOI: 10.1016/j.biochi.2022.06.003] [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: 01/25/2022] [Revised: 05/19/2022] [Accepted: 06/07/2022] [Indexed: 11/25/2022]
Abstract
Starch binding domain-containing protein 1 (STBD1) is an endoplasmic reticulum (ER)-resident, glycogen-binding protein. In addition to glycogen, STBD1 has been shown to interact with several proteins implicated in glycogen synthesis and degradation, yet its function in glycogen metabolism remains largely unknown. In addition to the bulk of the ER, STBD1 has been reported to localize at regions of physical contact between mitochondria and the ER, known as Mitochondria-ER Contact sites (MERCs). Given the emerging correlation between distortions in the integrity of hepatic MERCs and insulin resistance, our study aimed to delineate the role of STBD1 in vivo by addressing potential abnormalities in glucose metabolism and ER-mitochondria communication associated with insulin resistance in mice with targeted inactivation of Stbd1 (Stbd1KO). We show that Stbd1KO mice at the age of 24 weeks displayed reduced hepatic glycogen content and aberrant control of glucose homeostasis, compatible with insulin resistance. In line with the above, Stbd1-deficient mice presented with increased fasting blood glucose and insulin levels, attenuated activation of insulin signaling in the liver and skeletal muscle and elevated liver sphingomyelin content, in the absence of hepatic steatosis. Furthermore, Stbd1KO mice were found to exhibit enhanced ER-mitochondria association and increased mitochondrial fragmentation in the liver. Nevertheless, the enzymatic activity of hepatic respiratory chain complexes and ER stress levels in the liver were not altered. Our findings identify a novel important role for STBD1 in the control of glucose metabolism, associated with the integrity of hepatic MERCs.
Collapse
Affiliation(s)
- Styliana Kyriakoudi
- Biochemical Genetics Department, The Cyprus Institute of Neurology and Genetics, P.O. Box 23462, 1683, Nicosia, Cyprus
| | - Andria Theodoulou
- Biochemical Genetics Department, The Cyprus Institute of Neurology and Genetics, P.O. Box 23462, 1683, Nicosia, Cyprus
| | - Louiza Potamiti
- Cancer Genetics, Therapeutics & Ultrastructural Pathology Department, The Cyprus Institute of Neurology and Genetics, P.O. Box 23462, 1683, Nicosia, Cyprus
| | - Fabian Schumacher
- Freie Universität Berlin, Institute of Pharmacy, Königin-Luise-Str. 2+4, Berlin, Germany
| | - Margarita Zachariou
- Bioinformatics Department, The Cyprus Institute of Neurology and Genetics, P.O. Box 23462, 1683, Nicosia, Cyprus
| | - Revekka Papacharalambous
- Neuropathology Lab, Center for Neuromuscular Disorders, The Cyprus Institute of Neurology and Generics, P.O. Box 23462, 1683, Nicosia, Cyprus
| | - Burkhard Kleuser
- Freie Universität Berlin, Institute of Pharmacy, Königin-Luise-Str. 2+4, Berlin, Germany
| | - Mihalis I Panayiotidis
- Cancer Genetics, Therapeutics & Ultrastructural Pathology Department, The Cyprus Institute of Neurology and Genetics, P.O. Box 23462, 1683, Nicosia, Cyprus
| | - Anthi Drousiotou
- Biochemical Genetics Department, The Cyprus Institute of Neurology and Genetics, P.O. Box 23462, 1683, Nicosia, Cyprus
| | - Petros P Petrou
- Biochemical Genetics Department, The Cyprus Institute of Neurology and Genetics, P.O. Box 23462, 1683, Nicosia, Cyprus.
| |
Collapse
|
11
|
Simsek HU, Albayrak MGB, Kasap M, Simsek T, Akpinar G, Guler SA, Canturk NZ. Elucidation of the changes occurring at the proteome level in ovaries of high-fat diet-induced obese rats. Cell Biochem Funct 2022; 40:278-297. [PMID: 35285971 DOI: 10.1002/cbf.3693] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 02/10/2022] [Accepted: 02/11/2022] [Indexed: 12/20/2022]
Abstract
High-fat diet-induced obesity adversely affects the female reproductive system. The metabolic changes that the high-fat diet causes on the ovaries have not been elucidated. Herein, to understand the molecular and cellular mechanisms underlying the effects of long-term high-fat diet-fed, the changes in the global proteomic profile of the rat ovaries were investigated. The female rats were randomly divided into two groups based on their diets: the ones that were fed with the high-fat diet and the other ones that were fed with the control diet for 18 weeks. To identify differentially expressed proteins, the changes in ovary proteomes were investigated by two-dimensional electrophoresis coupled to matrix-assisted laser desorption/ionization-time-of-flight/time-of-flight and label-free quantification with nano-high performance liquid chromatography to tandem mass spectrometry (nHPLC-MS/MS). A total of 80 proteins were differentially regulated. The upregulated proteins were involved in responses to chemical and organic substances, cytokines, external stimuli, and lipids. These proteins were particularly associated with vesicles, microbodies, and cell surface proteins. The downregulated proteins were involved in biological processes associated with cellular respiration. Those proteins created a network consisting of proteins involved in aerobic respiration and energy generation. Our results demonstrated that the mechanisms related to energy production in the ovary tissue were particularly affected by the high-fat diet.
Collapse
Affiliation(s)
- Hayal U Simsek
- Department of Obstetrics and Gynecology, Kocaeli University Faculty of Medicine, Izmit, Kocaeli, Turkey
| | - Merve G B Albayrak
- Department of Medical Biology, Kocaeli University Faculty of Medicine, Izmit, Kocaeli, Turkey
| | - Murat Kasap
- Department of Medical Biology, Kocaeli University Faculty of Medicine, Izmit, Kocaeli, Turkey
| | - Turgay Simsek
- Department of General Surgery, Kocaeli University Faculty of Medicine, Izmit, Kocaeli, Turkey
| | - Gurler Akpinar
- Department of Medical Biology, Kocaeli University Faculty of Medicine, Izmit, Kocaeli, Turkey
| | - Sertac A Guler
- Department of General Surgery, Kocaeli University Faculty of Medicine, Izmit, Kocaeli, Turkey
| | - Nuh Z Canturk
- Department of General Surgery, Kocaeli University Faculty of Medicine, Izmit, Kocaeli, Turkey
| |
Collapse
|
12
|
A theoretical argument to support the biological benefits for insulin stimulating mitochondrial oxidative phosphorylation. CURRENT OPINION IN PHYSIOLOGY 2022. [DOI: 10.1016/j.cophys.2022.100491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
13
|
Zhang P, Konja D, Zhang Y, Xu A, Lee IK, Jeon JH, Bashiri G, Mitra A, Wang Y. Clusterin is involved in mediating the metabolic function of adipose SIRT1. iScience 2022; 25:103709. [PMID: 35072003 PMCID: PMC8762396 DOI: 10.1016/j.isci.2021.103709] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 11/17/2021] [Accepted: 12/24/2021] [Indexed: 02/06/2023] Open
Abstract
SIRT1 is a metabolic sensor regulating energy homeostasis. The present study revealed that mice with selective overexpression of human SIRT1 in adipose tissue (Adipo-SIRT1) were protected from high-fat diet (HFD)-induced metabolic abnormalities. Adipose SIRT1 was enriched at mitochondria-ER contacts (MERCs) to trigger mitohormesis and unfolded protein response (UPRmt), in turn preventing ER stress. As a downstream target of UPRmt, clusterin was significantly upregulated and acted together with SIRT1 to regulate the protein and lipid compositions at MERCs of adipose tissue. In mice lacking clusterin, HFD-induced metabolic abnormalities were significantly enhanced and could not be prevented by overexpression of SIRT1 in adipose tissue. Treatment with ER stress inhibitors restored adipose SIRT1-mediated beneficial effects on systemic energy metabolism. In summary, adipose SIRT1 facilitated the dynamic interactions and communications between mitochondria and ER, via MERCs, in turn triggering a mild mitochondrial stress to instigate the defense responses against dietary obesity-induced metabolic dysfunctions.
Collapse
Affiliation(s)
- Pengcheng Zhang
- The State Key Laboratory of Pharmaceutical Biotechnology, 21 Sassoon Road, Pokfulam, Hong Kong SAR, China
- Department of Pharmacology and Pharmacy, 21 Sassoon Road, Pokfulam, Hong Kong SAR, China
| | - Daniels Konja
- The State Key Laboratory of Pharmaceutical Biotechnology, 21 Sassoon Road, Pokfulam, Hong Kong SAR, China
- Department of Pharmacology and Pharmacy, 21 Sassoon Road, Pokfulam, Hong Kong SAR, China
| | - Yiwei Zhang
- The State Key Laboratory of Pharmaceutical Biotechnology, 21 Sassoon Road, Pokfulam, Hong Kong SAR, China
- Department of Pharmacology and Pharmacy, 21 Sassoon Road, Pokfulam, Hong Kong SAR, China
| | - Aimin Xu
- The State Key Laboratory of Pharmaceutical Biotechnology, 21 Sassoon Road, Pokfulam, Hong Kong SAR, China
- Department of Pharmacology and Pharmacy, 21 Sassoon Road, Pokfulam, Hong Kong SAR, China
- Department of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - In-Kyu Lee
- Department of Internal Medicine, School of Medicine, Kyungpook National University Hospital, Daegu41944, South Korea
- Research Institute of Aging and Metabolism, Kyungpook National University, Daegu41404, South Korea
| | - Jae-Han Jeon
- Department of Internal Medicine, School of Medicine, Kyungpook National University Hospital, Daegu41944, South Korea
- Research Institute of Aging and Metabolism, Kyungpook National University, Daegu41404, South Korea
| | - Ghader Bashiri
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Alok Mitra
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Yu Wang
- The State Key Laboratory of Pharmaceutical Biotechnology, 21 Sassoon Road, Pokfulam, Hong Kong SAR, China
- Department of Pharmacology and Pharmacy, 21 Sassoon Road, Pokfulam, Hong Kong SAR, China
| |
Collapse
|
14
|
Jiang Z, Cai X, Kong J, Zhang R, Ding Y. Maternally transmitted diabetes mellitus may be associated with mitochondrial ND5 T12338C and tRNA Ala T5587C variants. Ir J Med Sci 2022; 191:2625-2633. [PMID: 34993838 DOI: 10.1007/s11845-021-02911-w] [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: 11/08/2021] [Accepted: 12/25/2021] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Mutations/variants in mitochondrial genomes are found to be associated with type 2 diabetes mellitus (T2DM), but the pathophysiology of this disease remains largely unknown. AIM The aim of this study is to investigate the relationship between mitochondrial DNA (mtDNA) variants and T2DM. METHODOLOGY A maternally inherited T2DM pedigree is underwent clinical, genetic, and molecular assessment. Moreover, the complete mitochondrial genomes of the matrilineal relatives of this family are PCR amplified and sequenced. We also utilize the phylogenetic conservation analysis, haplogroup classification, and the pathogenicity scoring system to determine the T2DM-associated potential pathogenic mtDNA variants. RESULT Four of seven matrilineal relatives of this pedigree suffered from T2DM with variable ages of onset. Screening for the entire mtDNA genes of matrilineal members reveals co-existence of ND5 T12338C and tRNAAla T5587C variants, as well as 21 genetic polymorphisms which belong to East Asian haplogroup F2. Interestingly, the T12338C variant causes the alternation of first amino acid Met to Thr, shortened two amino acids of ND5 protein. Furthermore, T5587C variant is located at position 73 in the 3'end of mt-tRNAAla and may have structural and functional consequences. CONCLUSIONS The co-occurrence of ND5 T12338C and tRNAAla T5587C variants may impair the mitochondrial function, which are associated with the development of T2DM in this family.
Collapse
Affiliation(s)
- Zhaochang Jiang
- Department of Pathology, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Xiaobo Cai
- Department of Pathology, Taizhou Central Hospital, Taizhou University Hospital, Taizhou, China
| | - Jing Kong
- Department of Endocrinology and Metabolism, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Ruyi Zhang
- Department of Pathology, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Yu Ding
- Central Laboratory, Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China.
| |
Collapse
|
15
|
Obesity, Body Image Dissatisfaction, and Sexual Dysfunction: A Narrative Review. SEXES 2022. [DOI: 10.3390/sexes3010002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
With approximately two-thirds of the United States adult population classified as overweight or obese, obesity remains a critical public health concern. Obesity not only contributes to several health complications including type 2 diabetes mellitus and cardiovascular disease, but the condition is also associated with sexual dysfunction in both women and men. Despite evidence linking obesity and its concomitant pathophysiology to sexual problems, the potential roles of psychosocial factors such as body image are understudied. This narrative review evaluates the research linkages between obesity and sexual dysfunction, with particular attention to the potential effects of body image dissatisfaction. A literature search of biomedical and psychological databases was used to identify research pertaining to obesity, sexual function, and/or body image constructs. The pathophysiological effects of obesity on sexual function are well-documented in mechanistic studies and animal trials, often with corroboration in human clinical samples. However, very few studies examine obesity, body image, and sexual function in tandem. Body image dissatisfaction appears to independently impinge upon the sexual response cycle and mental health outcomes, irrespective of body weight. While obesity is often associated with negative body image appraisal, it is unclear whether these constructs exert additive, synergistic, or antagonistic effects on sexual responsivity. Additionally, overweight/obese individuals who exhibit higher levels of body image satisfaction or self-confidence appear to be protected from the deleterious effects of obesity on sexual satisfaction, at least to some extent. Greater reliance upon conceptual/theoretical models from the body image literature may better clarify the relationships between these constructs.
Collapse
|
16
|
Chen CC, Hsu LW, Chen KD, Chiu KW, Chen CL, Huang KT. Emerging Roles of Calcium Signaling in the Development of Non-Alcoholic Fatty Liver Disease. Int J Mol Sci 2021; 23:ijms23010256. [PMID: 35008682 PMCID: PMC8745268 DOI: 10.3390/ijms23010256] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 12/22/2021] [Accepted: 12/22/2021] [Indexed: 01/10/2023] Open
Abstract
The liver plays a central role in energy metabolism. Dysregulated hepatic lipid metabolism is a major cause of non-alcoholic fatty liver disease (NAFLD), a chronic liver disorder closely linked to obesity and insulin resistance. NAFLD is rapidly emerging as a global health problem with currently no approved therapy. While early stages of NAFLD are often considered benign, the disease can progress to an advanced stage that involves chronic inflammation, with increased risk for developing end-stage disease including fibrosis and liver cancer. Hence, there is an urgent need to identify potential pharmacological targets. Ca2+ is an essential signaling molecule involved in a myriad of cellular processes. Intracellular Ca2+ is intricately compartmentalized, and the Ca2+ flow is tightly controlled by a network of Ca2+ transport and buffering proteins. Impaired Ca2+ signaling is strongly associated with endoplasmic reticulum stress, mitochondrial dysfunction and autophagic defects, all of which are etiological factors of NAFLD. In this review, we describe the recent advances that underscore the critical role of dysregulated Ca2+ homeostasis in lipid metabolic abnormalities and discuss the feasibility of targeting Ca2+ signaling as a potential therapeutic approach.
Collapse
Affiliation(s)
- Chien-Chih Chen
- Department of Psychiatry, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan;
| | - Li-Wen Hsu
- Liver Transplantation Center, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (L.-W.H.); (K.-D.C.); (K.-W.C.); (C.-L.C.)
| | - Kuang-Den Chen
- Liver Transplantation Center, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (L.-W.H.); (K.-D.C.); (K.-W.C.); (C.-L.C.)
- Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
| | - King-Wah Chiu
- Liver Transplantation Center, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (L.-W.H.); (K.-D.C.); (K.-W.C.); (C.-L.C.)
- Division of Hepato-Gastroenterology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
| | - Chao-Long Chen
- Liver Transplantation Center, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (L.-W.H.); (K.-D.C.); (K.-W.C.); (C.-L.C.)
| | - Kuang-Tzu Huang
- Liver Transplantation Center, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (L.-W.H.); (K.-D.C.); (K.-W.C.); (C.-L.C.)
- Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
- Correspondence: ; Tel.: +886-7-731-7123 (ext. 8193)
| |
Collapse
|
17
|
Townsend LK, Medak KD, Weber AJ, Dibe H, Shamshoum H, Wright DC. CHOP is Dispensable for Exercise-Induced Increases in GDF15. J Appl Physiol (1985) 2021; 132:413-422. [PMID: 34913737 DOI: 10.1152/japplphysiol.00698.2021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Growth differentiating factor-15 (GDF15) is expressed, and secreted, from a wide range of tissues and serves as a marker of cellular stress. A key transcriptional regulator of this hormone is the endoplasmic reticulum stress protein, CHOP (C/EBP Homologous Protein). Exercise increases GDF15 levels but the underlying mechanisms of this are not known. To test whether CHOP regulates GDF15 during exercise we used various models of altered ER stress. We examined the effects of acute exercise on circulating GDF15 and GDF15 mRNA expression in liver, triceps skeletal muscle, and epididymal white adipose tissue and examined the GDF15 response to acute exercise in lean and high-fat diet-induced obese mice, sedentary and exercise trained mice, and CHOP deficient mice. We found that obesity augments exercise-induced circulating GDF15 although ER stress markers were similar in lean and obese mice. Exercise-induced GDF15 was increased in trained and sedentary mice that ran at the same relative exercise intensity, despite trained mice being protected against increased markers of ER stress. Finally, exercise-induced increases in GDF15 at the tissue and whole-body level were intact in CHOP deficient mice. Together, these results provide evidence that exercise-induced GDF15 expression and secretion occurs independent of ER stress/CHOP.
Collapse
Affiliation(s)
- Logan K Townsend
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada.,Centre for Metabolism, Obesity and Diabetes Research, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Kyle D Medak
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Alyssa J Weber
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Hana Dibe
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Hesham Shamshoum
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - David C Wright
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| |
Collapse
|
18
|
PACS-2 attenuates diabetic kidney disease via the enhancement of mitochondria-associated endoplasmic reticulum membrane formation. Cell Death Dis 2021; 12:1107. [PMID: 34836936 PMCID: PMC8626491 DOI: 10.1038/s41419-021-04408-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 11/04/2021] [Accepted: 11/09/2021] [Indexed: 02/07/2023]
Abstract
The altered homeostasis of mitochondria-associated endoplasmic reticulum (ER) membranes (MAM) was closely associated with the pathological process of nervous system diseases and insulin resistance. Here, the exact implication of phosphofurin acidic cluster sorting protein 2 (PCAS-2), an anchor protein in the MAM interface, in diabetic kidney disease was investigated. In the kidneys of type 1 and type 2 diabetes mice and HG-induced HK-2 cells, a notable disruption of ER-mitochondria interactions, accompanied by a decreased PACS-2 expression in all subcellular fractions. Furthermore, PACS-2 knockout mice with diabetes displayed accelerated development of proteinuria, deterioration of kidney function, and aggravated disruption of MAM area, ER stress, mitochondrial dysfunction, renal apoptosis, and fibrosis. However, overexpression of PACS-2 effectively protected diabetic kidneys and HG-treated HK-2 cells from renal tubular impairments. Importantly, experimental uncoupling of ER-mitochondria contacts reversed the protective effects of PACS-2 restoration on HK-2 cells under HG conditions. In summary, our data indicate a pivotal role of PACS-2 in the development of diabetic renal tubular injury via the stabilization of MAM.
Collapse
|
19
|
Eshima H. Influence of Obesity and Type 2 Diabetes on Calcium Handling by Skeletal Muscle: Spotlight on the Sarcoplasmic Reticulum and Mitochondria. Front Physiol 2021; 12:758316. [PMID: 34795598 PMCID: PMC8592904 DOI: 10.3389/fphys.2021.758316] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Accepted: 10/14/2021] [Indexed: 12/25/2022] Open
Abstract
Obesity and diabetes have been shown to interfere with energy metabolism and cause peripheral insulin resistance in skeletal muscle. However, recent studies have focused on the effect metabolic insult has on the loss of muscle size, strength, and physical function. Contractile dysfunction has been linked to impaired intracellular Ca2+ concentration ([Ca2+]i) regulation. In skeletal muscle, [Ca2+]i homeostasis is highly regulated by Ca2+ transport across the sarcolemma/plasma membrane, the golgi apparatus, sarcoplasmic reticulum (SR), and mitochondria. Particularly, the SR and or mitochondria play an important role in the fine-tuning of this metabolic process. Recent studies showed that obesity and insulin resistance are associated with interactions between the SR and mitochondrial networks (the dynamic tubular reticulum formed by mitochondria), suggesting that metabolic disorders alter Ca2+ handling by these organelles. These interactions are facilitated by specific membrane proteins, including ion channels. This review considers the impact of metabolic disorders, such as obesity and type 2 diabetes, on the regulation of [Ca2+]i in skeletal muscle. It also discusses the mechanisms by which this occurs, focusing chiefly on the SR and mitochondria networks. A deeper understanding of the effect of metabolic disorders on calcium handling might be useful for therapeutic strategies.
Collapse
Affiliation(s)
- Hiroaki Eshima
- Department of International Tourism, Nagasaki International University, Nagasaki, Japan
| |
Collapse
|
20
|
Ding W, Liu H, Qin Z, Liu M, Zheng M, Cai D, Liu J. Dietary Antioxidant Anthocyanins Mitigate Type II Diabetes through Improving the Disorder of Glycometabolism and Insulin Resistance. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:13350-13363. [PMID: 34730960 DOI: 10.1021/acs.jafc.1c05630] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Insulin resistance (IR) is one of the pathological reasons for type II diabetes mellitus (T2DM). Therefore, it is important to prevent the body from developing T2DM by improving IR and maintaining glucose homeostasis. Anthocyanins (ACNs) are water-soluble pigments and are widely distributed in natural products. This article summarizes research on the bioavailability and metabolism of ACNs. Moreover, we further elaborate on how ACNs reduce IR and hyperglycemia during the development of T2DM based on studies over the past 20 years. Many studies have demonstrated that ACNs are small molecules that target the pancreatic, liver, muscle, and adipose tissues, preventing IR and hyperglycemia. However, the molecular mechanisms are still unclear. Therefore, we envision whether the molecular mechanism of reducing T2DM by ACNs could be more deeply investigated.
Collapse
Affiliation(s)
- Wei Ding
- College of Food Science and Engineering, Jilin Agricultural University, 130118 Changchun, China
- National Engineering Laboratory for Wheat and Corn Deep Processing, 130118 Changchun, China
| | - Huimin Liu
- College of Food Science and Engineering, Jilin Agricultural University, 130118 Changchun, China
- National Engineering Laboratory for Wheat and Corn Deep Processing, 130118 Changchun, China
| | - Ziqi Qin
- College of Food Science and Engineering, Jilin Agricultural University, 130118 Changchun, China
| | - Meihong Liu
- College of Food Science and Engineering, Jilin Agricultural University, 130118 Changchun, China
- National Engineering Laboratory for Wheat and Corn Deep Processing, 130118 Changchun, China
| | - Mingzhu Zheng
- College of Food Science and Engineering, Jilin Agricultural University, 130118 Changchun, China
- National Engineering Laboratory for Wheat and Corn Deep Processing, 130118 Changchun, China
| | - Dan Cai
- College of Food Science and Engineering, Jilin Agricultural University, 130118 Changchun, China
- National Engineering Laboratory for Wheat and Corn Deep Processing, 130118 Changchun, China
| | - Jingsheng Liu
- College of Food Science and Engineering, Jilin Agricultural University, 130118 Changchun, China
- National Engineering Laboratory for Wheat and Corn Deep Processing, 130118 Changchun, China
| |
Collapse
|
21
|
The Mitochondrial-Associated Endoplasmic Reticulum Membrane and Its Role in Diabetic Nephropathy. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:8054817. [PMID: 34777695 PMCID: PMC8589504 DOI: 10.1155/2021/8054817] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/20/2021] [Accepted: 10/17/2021] [Indexed: 12/17/2022]
Abstract
The mitochondrial-associated endoplasmic reticulum membrane (MAM) is located between the outer mitochondrial membrane and the endoplasmic reticulum membrane. The MAM is involved in a wide range of cellular functions, including calcium signaling, the division and fusion of mitochondria, endoplasmic reticulum stress, and the synthesis and transport of lipids. Recent studies have discovered that the MAM is involved in the pathogenesis of diabetic nephropathy (DN). In this article, we summarize the structure, function and role of the MAM in DN. We hope this study will provide clues and a theoretical basis for mechanistic and targeted drug research on DN.
Collapse
|
22
|
Casey T, Suarez-Trujillo AM, McCabe C, Beckett L, Klopp R, Brito L, Rocha Malacco VM, Hilger S, Donkin SS, Boerman J, Plaut K. Transcriptome analysis reveals disruption of circadian rhythms in late gestation dairy cows may increase risk for fatty liver and reduced mammary remodeling. Physiol Genomics 2021; 53:441-455. [PMID: 34643103 DOI: 10.1152/physiolgenomics.00028.2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Circadian disruption increased insulin resistance and decreased mammary development in late gestation, nonlactating (dry) cows. The objective was to measure the effect of circadian disruption on transcriptomes of the liver and mammary gland. At 35 days before expected calving (BEC), multiparous dry cows were assigned to either control (CON) or phase-shifted treatments (PS). CON was exposed to 16-h light and 8-h dark. PS was exposed to 16-h light to 8-h dark, but phase of the light-dark cycle was shifted 6 h every 3 days. On day 21 BEC, liver and mammary were biopsied. RNA was isolated (n = 6 CON, n = 6 PS per tissue), and libraries were prepared and sequenced using paired-end reads. Reads mapping to bovine genome averaged 27 ± 2 million and aligned to 14,222 protein-coding genes in liver and 15,480 in mammary analysis. In the liver, 834 genes, and in the mammary gland, 862 genes were different (nominal P < 0.05) between PS and CON. In the liver, genes upregulated in PS functioned in cholesterol biosynthesis, endoplasmic reticulum stress, wound healing, and inflammation. Genes downregulated in liver function in cholesterol efflux. In the mammary gland, genes upregulated functioned in mRNA processing and transcription and downregulated genes encoded extracellular matrix proteins and proteases, cathepsins and lysosomal proteases, lipid transporters, and regulated oxidative phosphorylation. Increased cholesterol synthesis and decreased efflux suggest that circadian disruption potentially increases the risk of fatty liver in cows. Decreased remodeling and lipid transport in mammary may decrease milk production capacity during lactation.
Collapse
Affiliation(s)
- Theresa Casey
- Department of Animal Sciences, Purdue University, West Lafayette, Indiana
| | | | - Conor McCabe
- Department of Animal Sciences, Purdue University, West Lafayette, Indiana
| | - Linda Beckett
- Department of Animal Sciences, Purdue University, West Lafayette, Indiana
| | - Rebecca Klopp
- Department of Animal Sciences, Purdue University, West Lafayette, Indiana
| | - Luiz Brito
- Department of Animal Sciences, Purdue University, West Lafayette, Indiana
| | | | - Susan Hilger
- Department of Animal Sciences, Purdue University, West Lafayette, Indiana
| | - Shawn S Donkin
- Department of Animal Sciences, Purdue University, West Lafayette, Indiana
| | - Jacquelyn Boerman
- Department of Animal Sciences, Purdue University, West Lafayette, Indiana
| | - Karen Plaut
- Department of Animal Sciences, Purdue University, West Lafayette, Indiana
| |
Collapse
|
23
|
Zhang LY, Lin RT, Chen HR, Yang YC, Lin MF, Tian LG, Pan ZQ, Lin L, Zhu LL, Gu ZJ, Chen XW, Li YJ, Chen S, Cai SY. High Glucose Activated Cardiac Fibroblasts by a Disruption of Mitochondria-Associated Membranes. Front Physiol 2021; 12:724470. [PMID: 34483973 PMCID: PMC8416471 DOI: 10.3389/fphys.2021.724470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Accepted: 07/13/2021] [Indexed: 11/13/2022] Open
Abstract
Cardiac fibrosis is evident even in the situation without a significant cardiomyocyte loss in diabetic cardiomyopathy and a high glucose (HG) level independently activates the cardiac fibroblasts (CFs) and promotes cell proliferation. Mitochondrial respiration and glycolysis, which are key for cell proliferation and the mitochondria-associated membranes (MAMs), are critically involved in this process. However, the roles and the underlying mechanism of MAMs in the proliferation of HG-induced CFs are largely unknown. The proliferation and apoptosis of CFs responding to HG treatment were evaluated. The MAMs were quantified, and the mitochondrial respiration and cellular glycolytic levels were determined using the Seahorse XF analyzer. The changes of signal transducer and activator of transcription 3 (STAT3) and mitofusin-2 (MFN2) in responding to HG were also determined, the effects of which on cell proliferation, MAMs, and mitochondrial respiration were assessed. The effects of STAT3 on MFN2 transcription was determined by the dual-luciferase reporter assay (DLRA) and chromatin immunoprecipitation (CHIP). HG-induced CFs proliferation increased the glycolytic levels and adenosine triphosphate (ATP) production, while mitochondrial respiration was inhibited. The MAMs and MFN2 expressions were significantly reduced on the HG treatment, and the restoration of MFN2 expression counteracted the effects of HG on cell proliferation, mitochondrial respiration of the MAMs, glycolytic levels, and ATP production. The mitochondrial STAT3 contents were not changed by HG, but the levels of phosphorylated STAT3 and nuclear STAT3 were increased. The inhibition of STAT3 reversed the reduction of MFN2 levels induced by HG. The DLRA and CHIP directly demonstrated the negative regulation of MFN2 by STAT3 at the transcription levels via interacting with the sequences in the MFN2 promoter region locating at about −400 bp counting from the start site of transcription. The present study demonstrated that the HG independently induced CFs proliferation via promoting STAT3 translocation to the nucleus, which switched the mitochondrial respiration to glycolysis to produce ATP by inhibiting MAMs in an MFN2-depression manner.
Collapse
Affiliation(s)
- Ling-Yu Zhang
- Department of Cardiology, Maoming People's Hospital, Maoming, China
| | - Rui-Ting Lin
- Department of Cardiology, Maoming People's Hospital, Maoming, China
| | - Hao-Ran Chen
- Department of Cardiology, Maoming People's Hospital, Maoming, China
| | - Yong-Cong Yang
- Department of Cardiology, Maoming People's Hospital, Maoming, China
| | - Meng-Fei Lin
- Department of Cardiology, Maoming People's Hospital, Maoming, China
| | - Lei-Gang Tian
- Department of Cardiology, Maoming People's Hospital, Maoming, China
| | - Zhi-Qiong Pan
- Department of Cardiology, Maoming People's Hospital, Maoming, China
| | - Lin Lin
- Department of Cardiology, Maoming People's Hospital, Maoming, China
| | - Liang-Liang Zhu
- Department of Cardiology, Maoming People's Hospital, Maoming, China
| | - Zhen-Jie Gu
- Department of Cardiology, Maoming People's Hospital, Maoming, China
| | - Xue-Wen Chen
- Department of Cardiology, Maoming People's Hospital, Maoming, China
| | - Yu-Jing Li
- Department of Cardiology, Maoming People's Hospital, Maoming, China
| | - Shuai Chen
- Department of Cardiology, Maoming People's Hospital, Maoming, China
| | - Shi-Yun Cai
- Department of Cardiology, Maoming People's Hospital, Maoming, China
| |
Collapse
|
24
|
Structure and Function of Mitochondria-Associated Endoplasmic Reticulum Membranes (MAMs) and Their Role in Cardiovascular Diseases. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:4578809. [PMID: 34336092 PMCID: PMC8289621 DOI: 10.1155/2021/4578809] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 06/30/2021] [Indexed: 12/12/2022]
Abstract
Abnormal function of suborganelles such as mitochondria and endoplasmic reticulum often leads to abnormal function of cardiomyocytes or vascular endothelial cells and cardiovascular disease (CVD). Mitochondria-associated membrane (MAM) is involved in several important cellular functions. Increasing evidence shows that MAM is involved in the pathogenesis of CVD. MAM mediates multiple cellular processes, including calcium homeostasis regulation, lipid metabolism, unfolded protein response, ROS, mitochondrial dynamics, autophagy, apoptosis, and inflammation, which are key risk factors for CVD. In this review, we discuss the structure of MAM and MAM-associated proteins, their role in CVD progression, and the potential use of MAM as the therapeutic targets for CVD treatment.
Collapse
|
25
|
Kim AK, Kwon DW, Yeom E, Lee KP, Kwon KS, Yu K, Lee KS. Lipophorin receptor 1 (LpR1) in Drosophila muscle influences life span by regulating mitochondrial aging. Biochem Biophys Res Commun 2021; 568:95-102. [PMID: 34217014 DOI: 10.1016/j.bbrc.2021.06.080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 06/24/2021] [Indexed: 10/21/2022]
Abstract
Sarcopenia is a syndrome characterized by progressive loss of muscle mass and function during aging. Although mitochondrial dysfunction and related metabolic defects precede age-related changes in muscle, their contributions to muscle aging are still not well known. In this study, we used a Drosophila model to investigate the role of lipophorin receptors (LpRs), a Drosophila homologue of the mammalian very low-density lipoprotein receptor (VLDLR), in mitochondrial dynamics and muscle aging. Muscle-specific knockdown of LpR1 or LpR2 resulted in mitochondrial dysfunction and reduced proteostasis, which contributed to muscle aging. Activation of AMP-activated protein kinase (AMPK) ameliorated muscle dysfunction induced by LpR1 knockdown. These results suggest that LpR1/VLDLR is a novel key target that modulates age-dependent lipid remodeling and muscle homeostasis.
Collapse
Affiliation(s)
- Ae-Kyeong Kim
- Metabolism and Neurophysiology Research Group, KRIBB, Daejeon, 34141, South Korea
| | - Dae-Woo Kwon
- Metabolism and Neurophysiology Research Group, KRIBB, Daejeon, 34141, South Korea; Department of Functional Genomics, UST, Daejeon, 34113, South Korea
| | - Eunbyul Yeom
- Metabolism and Neurophysiology Research Group, KRIBB, Daejeon, 34141, South Korea; Tunneling Nanotube Research Cnter, Korea University, Seoul, 02841, South Korea
| | - Kwang-Pyo Lee
- Department of Functional Genomics, UST, Daejeon, 34113, South Korea; Aging Research Center, KRIBB, Daejeon, 34141, South Korea; Aventi Inc. Daejeon, 34141, South Korea
| | - Ki-Sun Kwon
- Department of Functional Genomics, UST, Daejeon, 34113, South Korea; Aging Research Center, KRIBB, Daejeon, 34141, South Korea; Aventi Inc. Daejeon, 34141, South Korea
| | - Kweon Yu
- Metabolism and Neurophysiology Research Group, KRIBB, Daejeon, 34141, South Korea; Department of Functional Genomics, UST, Daejeon, 34113, South Korea; Convergence Research Center of Dementia, KIST, Seoul, 02792, South Korea.
| | - Kyu-Sun Lee
- Metabolism and Neurophysiology Research Group, KRIBB, Daejeon, 34141, South Korea; Department of Functional Genomics, UST, Daejeon, 34113, South Korea.
| |
Collapse
|
26
|
Insulin rapidly increases skeletal muscle mitochondrial ADP sensitivity in the absence of a high lipid environment. Biochem J 2021; 478:2539-2553. [PMID: 34129667 DOI: 10.1042/bcj20210264] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 06/07/2021] [Accepted: 06/14/2021] [Indexed: 11/17/2022]
Abstract
Reductions in mitochondrial function have been proposed to cause insulin resistance, however the possibility that impairments in insulin signaling negatively affects mitochondrial bioenergetics has received little attention. Therefore, we tested the hypothesis that insulin could rapidly improve mitochondrial ADP sensitivity, a key process linked to oxidative phosphorylation and redox balance, and if this phenomenon would be lost following high-fat diet (HFD)-induced insulin resistance. Insulin acutely (60 min post I.P.) increased submaximal (100-1000 µM ADP) mitochondrial respiration ∼2-fold without altering maximal (>1000 µM ADP) respiration, suggesting insulin rapidly improves mitochondrial bioenergetics. The consumption of HFD impaired submaximal ADP-supported respiration ∼50%, however, despite the induction of insulin resistance, the ability of acute insulin to stimulate ADP sensitivity and increase submaximal respiration persisted. While these data suggest that insulin mitigates HFD-induced impairments in mitochondrial bioenergetics, the presence of a high intracellular lipid environment reflective of an HFD (i.e. presence of palmitoyl-CoA) completely prevented the beneficial effects of insulin. Altogether, these data show that while insulin rapidly stimulates mitochondrial bioenergetics through an improvement in ADP sensitivity, this phenomenon is possibly lost following HFD due to the presence of intracellular lipids.
Collapse
|
27
|
Townsend LK, Weber AJ, Day EA, Shamshoum H, Shaw SJ, Perry CGR, Kemp BE, Steinberg GR, Wright DC. AMPK mediates energetic stress-induced liver GDF15. FASEB J 2021; 35:e21218. [PMID: 33337559 DOI: 10.1096/fj.202000954r] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 10/30/2020] [Accepted: 11/10/2020] [Indexed: 12/11/2022]
Abstract
Growth differentiating factor-15 (GDF15) is an emerging target for the treatment of obesity and metabolic disease partly due to its ability to suppress food intake. GDF15 expression and secretion are thought to be regulated by a cellular integrated stress response, which involves endoplasmic reticulum (ER) stress. AMPK is another cellular stress sensor, but the relationship between AMPK, ER stress, and GDF15 has not been assessed in vivo. Wildtype (WT), AMPK β1 deficient (AMPKβ1-/- ), and CHOP-/- mice were treated with three distinct AMPK activators; AICAR, which is converted to ZMP mimicking the effects of AMP on the AMPKγ isoform, R419, which indirectly activates AMPK through inhibition of mitochondrial respiration, or A769662, a direct AMPK activator which binds the AMPKβ1 isoform ADaM site causing allosteric activation. Following treatments, liver Gdf15, markers of ER-stress, AMPK activity, adenine nucleotides, circulating GDF15, and food intake were assessed. AICAR and R419 caused ER and energetic stress, increased GDF15 expression and secretion, and suppressed food intake. Direct activation of AMPK β1 containing complexes by A769662 increased hepatic Gdf15 expression, circulating GDF15, and suppressed food intake, independent of ER stress. The effects of AICAR, R419, and A769662 on GDF15 were attenuated in AMPKβ1-/- mice. AICAR and A769662 increased GDF15 to a similar extent in WT and CHOP-/- mice. Herein, we provide evidence that AMPK plays a role in mediating the induction of GDF15 under conditions of energetic stress in mouse liver in vivo.
Collapse
Affiliation(s)
- Logan K Townsend
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada.,Centre for Metabolism, Obesity and Diabetes Research and Division of Endocrinology and Metabolism, Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Alyssa J Weber
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada
| | - Emily A Day
- Centre for Metabolism, Obesity and Diabetes Research and Division of Endocrinology and Metabolism, Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Hesham Shamshoum
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada
| | - Simon J Shaw
- Rigel Pharmaceuticals Inc., South San Francisco, CA, USA
| | - Christopher G R Perry
- School of Kinesiology and Health Science, Muscle Health Research Centre, York University, Toronto, ON, Canada
| | - Bruce E Kemp
- Department of Medicine, St. Vincent's Institute, University of Melbourne, Melbourne, Vic, Australia.,Mary MacKillop Institute for Health Research, Australian Catholic University, Fitzroy, Victoria, Australia
| | - Gregory R Steinberg
- Centre for Metabolism, Obesity and Diabetes Research and Division of Endocrinology and Metabolism, Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - David C Wright
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada
| |
Collapse
|
28
|
Ding LN, Cheng Y, Xu LY, Zhou LQ, Guan L, Liu HM, Zhang YX, Li RM, Xu JW. The β3 Adrenergic Receptor Agonist CL316243 Ameliorates the Metabolic Abnormalities of High-Fat Diet-Fed Rats by Activating AMPK/PGC-1α Signaling in Skeletal Muscle. Diabetes Metab Syndr Obes 2021; 14:1233-1241. [PMID: 33776460 PMCID: PMC7987271 DOI: 10.2147/dmso.s297351] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 03/02/2021] [Indexed: 12/15/2022] Open
Abstract
PURPOSE Skeletal muscle has a major influence on whole-body metabolic homeostasis. In the present study, we aimed to determine the metabolic effects of the β3 adrenergic receptor agonist CL316243 (CL) in the skeletal muscle of high-fat diet-fed rats. METHODS Sprague-Dawley rats were randomly allocated to three groups, which were fed a control diet (C) or a high-fat diet (HF), and half of the latter were administered 1 mg/kg CL by gavage once weekly (HF+CL), for 12 weeks. At the end of this period, the serum lipid profile and glucose tolerance of the rats were evaluated. In addition, the phosphorylation and protein and mRNA expression of AMP-activated protein kinase (AMPK), peroxisome proliferator-activated receptor γ coactivator (PGC)-1α, and carnitine palmitoyl transferase (CPT)-1b in skeletal muscle were measured by Western blot analysis and qPCR. The direct effects of CL on the phosphorylation (p-) and expression of AMPK, PGC-1α, and CPT-1b were also evaluated by Western blotting and immunofluorescence in L6 myotubes. RESULTS CL administration ameliorated the abnormal lipid profile and glucose tolerance of the high-fat diet-fed rats. In addition, the expression of p-AMPK, PGC-1α, and CPT-1b in the soleus muscle was significantly increased by CL. CL (1 µM) also increased the protein expression of p-AMPK, PGC-1α, and CPT-1b in L6 myotubes. However, the effect of CL on PGC-1α protein expression was blocked by the AMPK antagonist compound C, which suggests that CL increases PGC-1α protein expression via AMPK. CONCLUSION Activation of the β3 adrenergic receptor in skeletal muscle ameliorates the metabolic abnormalities of high-fat diet-fed rats, at least in part via activation of the AMPK/PGC-1α pathway.
Collapse
Affiliation(s)
- Li-Na Ding
- The Research Center of Basic Integrative Medicine, Basic Medical College, Guangzhou University of Chinese Medicine, University Town, Guangzhou, 510006, People’s Republic of China
| | - Ya Cheng
- The Research Center of Basic Integrative Medicine, Basic Medical College, Guangzhou University of Chinese Medicine, University Town, Guangzhou, 510006, People’s Republic of China
| | - Lu-Yao Xu
- The Research Center of Basic Integrative Medicine, Basic Medical College, Guangzhou University of Chinese Medicine, University Town, Guangzhou, 510006, People’s Republic of China
| | - Le-Quan Zhou
- The Research Center of Basic Integrative Medicine, Basic Medical College, Guangzhou University of Chinese Medicine, University Town, Guangzhou, 510006, People’s Republic of China
- Department of Physiology, Basic Medical College, Guangzhou University of Chinese Medicine, University Town, Guangzhou, 510006, People’s Republic of China
| | - Li Guan
- The Research Center of Basic Integrative Medicine, Basic Medical College, Guangzhou University of Chinese Medicine, University Town, Guangzhou, 510006, People’s Republic of China
- Department of Physiology, Basic Medical College, Guangzhou University of Chinese Medicine, University Town, Guangzhou, 510006, People’s Republic of China
| | - Hai-Mei Liu
- The Research Center of Basic Integrative Medicine, Basic Medical College, Guangzhou University of Chinese Medicine, University Town, Guangzhou, 510006, People’s Republic of China
- Department of Physiology, Basic Medical College, Guangzhou University of Chinese Medicine, University Town, Guangzhou, 510006, People’s Republic of China
| | - Ya-Xing Zhang
- The Research Center of Basic Integrative Medicine, Basic Medical College, Guangzhou University of Chinese Medicine, University Town, Guangzhou, 510006, People’s Republic of China
- Department of Physiology, Basic Medical College, Guangzhou University of Chinese Medicine, University Town, Guangzhou, 510006, People’s Republic of China
| | - Run-Mei Li
- The Research Center of Basic Integrative Medicine, Basic Medical College, Guangzhou University of Chinese Medicine, University Town, Guangzhou, 510006, People’s Republic of China
| | - Jin-Wen Xu
- The Research Center of Basic Integrative Medicine, Basic Medical College, Guangzhou University of Chinese Medicine, University Town, Guangzhou, 510006, People’s Republic of China
- Department of Physiology, Basic Medical College, Guangzhou University of Chinese Medicine, University Town, Guangzhou, 510006, People’s Republic of China
- Correspondence: Jin-Wen Xu Guangzhou University of Chinese Medicine, University Town, Waihuan East Road 232, Guangzhou, 510006, People’s Republic of ChinaTel +86-20-39358028Fax +86-20-39358020 Email
| |
Collapse
|