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Musale V, Murdoch CE, Banah AK, Hasib A, Hennayake CK, Dong B, Lang CC, Wasserman DH, Kang L. Limiting extracellular matrix expansion in diet-induced obese mice reduces cardiac insulin resistance and prevents myocardial remodelling. Mol Metab 2024; 86:101970. [PMID: 38908792 DOI: 10.1016/j.molmet.2024.101970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Revised: 05/16/2024] [Accepted: 06/14/2024] [Indexed: 06/24/2024] Open
Abstract
OBJECTIVE Obesity increases deposition of extracellular matrix (ECM) components of cardiac tissue. Since obesity aggregates with insulin resistance and heart disease, it is imperative to determine whether the increased ECM deposition contributes to this disease cluster. The hypotheses tested in this study were that in cardiac tissue of obese mice i) increased deposition of ECM components (collagens and hyaluronan) contributes to cardiac insulin resistance and that a reduction in these components improves cardiac insulin action and ii) reducing excess collagens and hyaluronan mitigates obesity-associated cardiac dysfunction. METHODS Genetic and pharmacological approaches that manipulated collagen and hyaluronan contents were employed in obese C57BL/6 mice fed a high fat (HF) diet. Cardiac insulin sensitivity was measured by hyperinsulinemic-euglycemic clamp and cardiac function was measured by pressure-volume loop analysis in vivo. RESULTS We demonstrated a tight association between increased ECM deposition with cardiac insulin resistance. Increased collagen deposition by genetic deletion of matrix metalloproteinase 9 (MMP9) exacerbated cardiac insulin resistance and pirfenidone, a clinically available anti-fibrotic medication which inhibits collagen expression, improved cardiac insulin resistance in obese mice. Furthermore, decreased hyaluronan deposition by treatment with PEGylated human recombinant hyaluronidase PH20 (PEGPH20) improved cardiac insulin resistance in obese mice. These relationships corresponded to functional changes in the heart. Both PEGPH20 and pirfenidone treatment in obese mice ameliorated HF diet-induced abnormal myocardial remodelling. CONCLUSION Our results provide important new insights into the role of ECM deposition in the pathogenesis of cardiac insulin resistance and associated dysfunction in obesity of distinct mouse models. These findings support the novel therapeutic potential of targeting early cardiac ECM abnormalities in the prevention and treatment of obesity-related cardiovascular complications.
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Affiliation(s)
- Vishal Musale
- Division of Cellular and Systems Medicine, School of Medicine, University of Dundee, Dundee, Scotland, UK
| | - Colin E Murdoch
- Division of Cellular and Systems Medicine, School of Medicine, University of Dundee, Dundee, Scotland, UK
| | - Ayman K Banah
- Division of Cellular and Systems Medicine, School of Medicine, University of Dundee, Dundee, Scotland, UK
| | - Annie Hasib
- Division of Cellular and Systems Medicine, School of Medicine, University of Dundee, Dundee, Scotland, UK
| | - Chandani K Hennayake
- Division of Cellular and Systems Medicine, School of Medicine, University of Dundee, Dundee, Scotland, UK
| | - Bo Dong
- Department of Cardiology, Shandong Provincial Hospital Affiliated to Shandong University, Shandong, Jinan, China
| | - Chim C Lang
- Division of Molecular and Clinical Medicine, School of Medicine, University of Dundee, Dundee, Scotland, UK
| | - David H Wasserman
- Department of Molecular Physiology and Biophysics, Mouse Metabolic Phenotyping Center, Vanderbilt University, Nashville, TN, USA
| | - Li Kang
- Division of Cellular and Systems Medicine, School of Medicine, University of Dundee, Dundee, Scotland, UK. https://twitter.com/Kang_Lab
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Su M, Hou Y, Cai S, Li W, Wei Y, Wang R, Wu M, Liu M, Chang J, Yang K, Yiu K, Chen C. Elevated ITGA1 levels in type 2 diabetes: implications for cardiac function impairment. Diabetologia 2024; 67:850-863. [PMID: 38413438 PMCID: PMC10954979 DOI: 10.1007/s00125-024-06109-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 01/04/2024] [Indexed: 02/29/2024]
Abstract
AIMS/HYPOTHESIS Type 2 diabetes mellitus is known to contribute to the development of heart failure with preserved ejection fraction (HFpEF). However, identifying HFpEF in individuals with type 2 diabetes early on is often challenging due to a limited array of biomarkers. This study aims to investigate specific biomarkers associated with the progression of HFpEF in individuals with type 2 diabetes, for the purpose of enabling early detection and more effective management strategies. METHODS Blood samples were collected from individuals with type 2 diabetes, both with and without HFpEF, for proteomic analysis. Plasma integrin α1 (ITGA1) levels were measured and compared between the two groups. Participants were further categorised based on ITGA1 levels and underwent detailed transthoracic echocardiography at baseline and during a median follow-up period of 30 months. Multivariable linear and Cox regression analyses were conducted separately to assess the associations between plasma ITGA1 levels and changes in echocardiography indicators and re-hospitalisation risk. Additionally, proteomic data for the individuals' left ventricles, from ProteomeXchange database, were analysed to uncover mechanisms underlying the change in ITGA1 levels in HFpEF. RESULTS Individuals with type 2 diabetes and HFpEF showed significantly higher plasma ITGA1 levels than the individuals with type 2 diabetes without HFpEF. These elevated ITGA1 levels were associated with left ventricular remodelling and impaired diastolic function. Furthermore, during a median follow-up of 30 months, multivariable analysis revealed that elevated ITGA1 levels independently correlated with deterioration of both diastolic and systolic cardiac functions. Additionally, higher baseline plasma ITGA1 levels independently predicted re-hospitalisation risk (HR 2.331 [95% CI 1.387, 3.917], p=0.001). Proteomic analysis of left ventricular myocardial tissue provided insights into the impact of increased ITGA1 levels on cardiac fibrosis-related pathways and the contribution made by these changes to the development and progression of HFpEF. CONCLUSIONS/INTERPRETATION ITGA1 serves as a biomarker for monitoring cardiac structural and functional damage, can be used to accurately diagnose the presence of HFpEF, and can be used to predict potential deterioration in cardiac structure and function as well as re-hospitalisation for individuals with type 2 diabetes. Its measurement holds promise for facilitating risk stratification and early intervention to mitigate the adverse cardiovascular effects associated with diabetes. DATA AVAILABILITY The proteomic data of left ventricular myocardial tissue from individuals with type 2 diabetes, encompassing both those with and without HFpEF, is available from the ProteomeXchange database at http://proteomecentral.proteomexchange.org .
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Affiliation(s)
- Mengqi Su
- Department of Cardiology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
- Institute of Biomedicine and Biotechnology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Yilin Hou
- Department of Otorhinolaryngology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Sidong Cai
- Department of Cardiology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Wenpeng Li
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Yinxia Wei
- Department of Cardiology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Run Wang
- Department of Cardiology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Min Wu
- Department of Cardiology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Mingya Liu
- Department of Cardiology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Junlei Chang
- Institute of Biomedicine and Biotechnology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Kelaier Yang
- Department of Endocrinology and Metabolism, Shenzhen University General Hospital, Shenzhen, China
| | - Kaihang Yiu
- Department of Cardiology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China.
- Department of Cardiology, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China.
| | - Cong Chen
- Department of Cardiology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China.
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Musale V, Murdoch CE, Banah AK, Hasib A, Hennayake CK, Dong B, Lang CC, Wasserman DH, Kang L. Extracellular Matrix Abnormalities Contribute to Cardiac Insulin Resistance and Associated Dysfunction in Diet-induced Obese Mice. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.14.567128. [PMID: 38014154 PMCID: PMC10680679 DOI: 10.1101/2023.11.14.567128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Increased deposition of extracellular matrix (ECM) components such as collagens and hyaluronan contributes to the pathogenesis of obesity-associated insulin resistance in muscle, liver, and adipose tissue. Despite the significance of the heart in cardiovascular and metabolic diseases, maladaptive ECM remodelling in obesity-associated cardiac insulin resistance and cardiac dysfunction has not been studied. Using genetic and pharmacological approaches in mice fed a high fat (HF) diet, we demonstrated a tight association between increased ECM deposition with cardiac insulin resistance. Increased collagen deposition by genetic deletion of matrix metalloproteinase 9 (MMP9) exacerbated cardiac insulin resistance and decreased hyaluronan deposition by treatment with PEGylated human recombinant hyaluronidase PH20 (PEGPH20) improved cardiac insulin resistance in obese mice. These relationships corresponded to functional changes in the heart. PEGPH20 treatment in obese mice ameliorated HF diet-induced abnormal myocardial remodelling. In addition to hyaluronan, increased collagen deposition is a characteristic of the obese mouse heart. We further demonstrated that pirfenidone, a clinically available anti-fibrotic medication which inhibits collagen expression, improved cardiac insulin resistance and cardiac function in obese mice. Our results provide important new insights into the role of ECM remodelling in the pathogenesis of cardiac insulin resistance and associated dysfunction in obesity of distinct mouse models. These findings support the novel therapeutic potential of targeting early cardiac ECM abnormalities in the prevention and treatment of obesity-related cardiovascular complications.
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Zeng Q, Gao H, Yin S, Peng Y, Yang F, Fu Y, Deng X, Chen Y, Hou X, Wang Q, Jin Z, Song G, He J, Yin Y, Xu K. Genome-Wide Association Study and Identification of Candidate Genes for Intramuscular Fat Fatty Acid Composition in Ningxiang Pigs. Animals (Basel) 2023; 13:3192. [PMID: 37893916 PMCID: PMC10603709 DOI: 10.3390/ani13203192] [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: 07/27/2023] [Revised: 10/03/2023] [Accepted: 10/12/2023] [Indexed: 10/29/2023] Open
Abstract
Ningxiang pigs exhibit a diverse array of fatty acids, making them an intriguing model for exploring the genetic underpinnings of fatty acid metabolism. We conducted a genome-wide association study using a dataset comprising 50,697 single-nucleotide polymorphisms (SNPs) and samples from over 600 Ningxiang pigs. Our investigation yielded novel candidate genes linked to five saturated fatty acids (SFAs), four monounsaturated fatty acids (MUFAs), and five polyunsaturated fatty acids (PUFAs). Significant associations with SFAs, MUFAs, and PUFAs were found for 37, 21, and 16 SNPs, respectively. Notably, some SNPs have significant PVE, such as ALGA0047587, which can explain 89.85% variation in Arachidic acid (C20:0); H3GA0046208 and DRGA0016063 can explain a total of 76.76% variation in Elaidic Acid (C18:1n-9(t)), and the significant SNP ALGA0031262 of Arachidonic acid (C20:4n-6) can explain 31.76% of the variation. Several significant SNPs were positioned proximally to previously reported genes. In total, we identified 11 candidate genes (hnRNPU, CEPT1, ATP1B1, DPT, DKK1, PRKG1, EXT2, MEF2C, IL17RA, ITGA1 and ALOX5), six candidate genes (ALOX5AP, MEDAG, ISL1, RXRB, CRY1, and CDKAL1), and five candidate genes (NDUFA4L2, SLC16A7, OTUB1, EIF4E and ROBO2) associated with SFAs, MUFAs, and PUFAs, respectively. These findings hold great promise for advancing breeding strategies aimed at optimizing meat quality and enhancing lipid metabolism within the intramuscular fat (IMF) of Ningxiang pigs.
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Affiliation(s)
- Qinghua Zeng
- Animal Nutrition Genome and Germplasm Innovation Research Center, College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China
| | - Hu Gao
- Animal Nutrition Genome and Germplasm Innovation Research Center, College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China
- Laboratory of Animal Nutrition Physiology and Metabolism, The Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Shishu Yin
- Animal Nutrition Genome and Germplasm Innovation Research Center, College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China
| | - Yinglin Peng
- Hunan Institute of Animal & Veterinary Science, Changsha 410131, China
| | - Fang Yang
- Animal Nutrition Genome and Germplasm Innovation Research Center, College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China
| | - Yawei Fu
- Animal Nutrition Genome and Germplasm Innovation Research Center, College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China
- Laboratory of Animal Nutrition Physiology and Metabolism, The Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Xiaoxiao Deng
- Laboratory of Animal Nutrition Physiology and Metabolism, The Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Yue Chen
- Laboratory of Animal Nutrition Physiology and Metabolism, The Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Xiaohong Hou
- Laboratory of Animal Nutrition Physiology and Metabolism, The Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Qian Wang
- Animal Nutrition Genome and Germplasm Innovation Research Center, College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China
- Laboratory of Animal Nutrition Physiology and Metabolism, The Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Zhao Jin
- Animal Nutrition Genome and Germplasm Innovation Research Center, College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China
- Laboratory of Animal Nutrition Physiology and Metabolism, The Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Gang Song
- Animal Nutrition Genome and Germplasm Innovation Research Center, College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China
- Laboratory of Animal Nutrition Physiology and Metabolism, The Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Jun He
- Animal Nutrition Genome and Germplasm Innovation Research Center, College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China
| | - Yulong Yin
- Animal Nutrition Genome and Germplasm Innovation Research Center, College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China
- Laboratory of Animal Nutrition Physiology and Metabolism, The Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
| | - Kang Xu
- Laboratory of Animal Nutrition Physiology and Metabolism, The Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
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Garcia NA, Mellergaard M, Gonzalez-King H, Salomon C, Handberg A. Comprehensive Strategy for Identifying Extracellular Vesicle Surface Proteins as Biomarkers for Non-Alcoholic Fatty Liver Disease. Int J Mol Sci 2023; 24:13326. [PMID: 37686134 PMCID: PMC10487973 DOI: 10.3390/ijms241713326] [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: 07/18/2023] [Revised: 08/21/2023] [Accepted: 08/25/2023] [Indexed: 09/10/2023] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is a liver disorder that has become a global health concern due to its increasing prevalence. There is a need for reliable biomarkers to aid in the diagnosis and prognosis of NAFLD. Extracellular vesicles (EVs) are promising candidates in biomarker discovery, as they carry proteins that reflect the pathophysiological state of the liver. In this review, we developed a list of EV proteins that could be used as diagnostic biomarkers for NAFLD. We employed a multi-step strategy that involved reviewing and comparing various sources of information. Firstly, we reviewed papers that have studied EVs proteins as biomarkers in NAFLD and papers that have studied circulating proteins as biomarkers in NAFLD. To further identify potential candidates, we utilized the EV database Vesiclepedia.org to qualify each protein. Finally, we consulted the Human Protein Atlas to search for candidates' localization, focusing on membrane proteins. By integrating these sources of information, we developed a comprehensive list of potential EVs membrane protein biomarkers that could aid in diagnosing and monitoring NAFLD. In conclusion, our multi-step strategy for identifying EV-based protein biomarkers for NAFLD provides a comprehensive approach that can also be applied to other diseases. The protein candidates identified through this approach could have significant implications for the development of non-invasive diagnostic tests for NAFLD and improve the management and treatment of this prevalent liver disorder.
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Affiliation(s)
| | - Maiken Mellergaard
- Department of Clinical Biochemistry, Aalborg University Hospital, Aalborg Hobrovej 18-22, 9000 Aalborg, Denmark
- Department of Clinical Medicine, The Faculty of Medicine, Aalborg University, 9000 Aalborg, Denmark
| | - Hernan Gonzalez-King
- Research and Early Development, Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, 431 50 Gothenburg, Sweden
| | - Carlos Salomon
- Translational Extracellular Vesicles in Obstetrics and Gynae-Oncology Group, University of Queensland, Brisbane, QLD 4029, Australia
| | - Aase Handberg
- Department of Clinical Biochemistry, Aalborg University Hospital, Aalborg Hobrovej 18-22, 9000 Aalborg, Denmark
- Department of Clinical Medicine, The Faculty of Medicine, Aalborg University, 9000 Aalborg, Denmark
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6
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Silva TDL, Gondro C, Fonseca PADS, da Silva DA, Vargas G, Neves HHDR, Carvalho Filho I, Teixeira CDS, de Albuquerque LG, Carvalheiro R. Feet and legs malformation in Nellore cattle: genetic analysis and prioritization of GWAS results. Front Genet 2023; 14:1118308. [PMID: 37662838 PMCID: PMC10468598 DOI: 10.3389/fgene.2023.1118308] [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: 12/07/2022] [Accepted: 08/01/2023] [Indexed: 09/05/2023] Open
Abstract
Beef cattle affected by feet and legs malformations (FLM) cannot perform their productive and reproductive functions satisfactorily, resulting in significant economic losses. Accelerated weight gain in young animals due to increased fat deposition can lead to ligaments, tendon and joint strain and promote gene expression patterns that lead to changes in the normal architecture of the feet and legs. The possible correlated response in the FLM due to yearling weight (YW) selection suggest that this second trait could be used as an indirect selection criterion. Therefore, FLM breeding values and the genetic correlation between FLM and yearling weight (YW) were estimated for 295,031 Nellore animals by fitting a linear-threshold model in a Bayesian approach. A genome-wide association study was performed to identify genomic windows and positional candidate genes associated with FLM. The effects of single nucleotide polymorphisms (SNPs) on FLM phenotypes (affected or unaffected) were estimated using the weighted single-step genomic BLUP method, based on genotypes of 12,537 animals for 461,057 SNPs. Twelve non-overlapping windows of 20 adjacent SNPs explaining more than 1% of the additive genetic variance were selected for candidate gene annotation. Functional and gene prioritization analysis of candidate genes identified six genes (ATG7, EXT1, ITGA1, PPARD, SCUBE3, and SHOX) that may play a role in FLM expression due to their known role in skeletal muscle development, aberrant bone growth, lipid metabolism, intramuscular fat deposition and skeletogenesis. Identifying genes linked to foot and leg malformations enables selective breeding for healthier herds by reducing the occurrence of these conditions. Genetic markers can be used to develop tests that identify carriers of these mutations, assisting breeders in making informed breeding decisions to minimize the incidence of malformations in future generations, resulting in greater productivity and animal welfare.
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Affiliation(s)
- Thales de Lima Silva
- Department of Animal Science, School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil
| | - Cedric Gondro
- Department of Animal Science, College of Agriculture and Natural Resources, Michigan State University, East Lansing, MI, United States
| | | | | | - Giovana Vargas
- Department of Animal Science, School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil
| | | | - Ivan Carvalho Filho
- Department of Animal Science, School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil
| | - Caio de Souza Teixeira
- Department of Animal Science, School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil
| | - Lucia Galvão de Albuquerque
- Department of Animal Science, School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil
- Researcher at National Council for Scientific and Technological Development (CNPq), Brasília, Brazil
| | - Roberto Carvalheiro
- Department of Animal Science, School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil
- Researcher at National Council for Scientific and Technological Development (CNPq), Brasília, Brazil
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Musale V, Wasserman DH, Kang L. Extracellular matrix remodelling in obesity and metabolic disorders. LIFE METABOLISM 2023; 2:load021. [PMID: 37383542 PMCID: PMC10299575 DOI: 10.1093/lifemeta/load021] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/30/2023]
Abstract
Obesity causes extracellular matrix (ECM) remodelling which can develop into serious pathology and fibrosis, having metabolic effects in insulin-sensitive tissues. The ECM components may be increased in response to overnutrition. This review will focus on specific obesity-associated molecular and pathophysiological mechanisms of ECM remodelling and the impact of specific interactions on tissue metabolism. In obesity, complex network of signalling molecules such as cytokines and growth factors have been implicated in fibrosis. Increased ECM deposition contributes to the pathogenesis of insulin resistance at least in part through activation of cell surface integrin receptors and CD44 signalling cascades. These cell surface receptors transmit signals to the cell adhesome which orchestrates an intracellular response that adapts to the extracellular environment. Matrix proteins, glycoproteins, and polysaccharides interact through ligand-specific cell surface receptors that interact with the cytosolic adhesion proteins to elicit specific actions. Cell adhesion proteins may have catalytic activity or serve as scaffolds. The vast number of cell surface receptors and the complexity of the cell adhesome have made study of their roles challenging in health and disease. Further complicating the role of ECM-cell receptor interactions is the variation between cell types. This review will focus on recent insights gained from studies of two highly conserved, ubiquitously axes and how they contribute to insulin resistance and metabolic dysfunction in obesity. These are the collagen-integrin receptor-IPP (ILK-PINCH-Parvin) axis and the hyaluronan-CD44 interaction. We speculate that targeting ECM components or their receptor-mediated cell signalling may provide novel insights into the treatment of obesity-associated cardiometabolic complications.
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Affiliation(s)
- Vishal Musale
- Division of Systems Medicine, School of Medicine, University of Dundee, Dundee, Scotland DD1 9SY, UK
| | - David H. Wasserman
- Department of Molecular Physiology and Biophysics, Mouse Metabolic Phenotyping Center, Vanderbilt University, Nashville, TN 37235, USA
| | - Li Kang
- Division of Systems Medicine, School of Medicine, University of Dundee, Dundee, Scotland DD1 9SY, UK
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8
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Rahimi A, Rasouli M, Heidari Keshel S, Ebrahimi M, Pakdel F. Is obesity-induced ECM remodeling a prelude to the development of various diseases? Obes Res Clin Pract 2023; 17:95-101. [PMID: 36863919 DOI: 10.1016/j.orcp.2023.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 02/04/2023] [Accepted: 02/10/2023] [Indexed: 03/04/2023]
Abstract
Due to the increasing incidence rate of obesity worldwide and the associated complications such as type 2 diabetes and cardiovascular diseases, research on the adipose tissue physiology and the role of the extracellular matrix (ECM) has gained tremendous attention. The ECM, one of the most crucial components in body tissues, undergoes remodeling and regeneration of its constituents to guarantee normal tissue function. There is a crosstalk between fat tissue and various body organs, including but not limited to the liver, heart, kidney, skeletal muscle, and so forth. These organs respond to fat tissue signals through changes in ECM, function, and their secretory products. Obesity can cause ECM remodeling, inflammation, fibrosis, insulin resistance, and disrupted metabolism in different organs. However, the mechanisms underlying the reciprocal communication between various organs during obesity are still not fully elucidated. Gaining a profound knowledge of ECM alterations during the progression of obesity will pave the way toward developing potential strategies to either circumvent pathological conditions or open an avenue to treat complications associated with obesity.
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Affiliation(s)
- Azam Rahimi
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehdi Rasouli
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Saeed Heidari Keshel
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Maryam Ebrahimi
- Department of Ophthalmic Plastic & Reconstructive Surgery, Farabi Eye Hospital, Tehran, Iran
| | - Farzad Pakdel
- Ophthalmology Department, Eye Research Center, Tehran University of Medical Sciences, Tehran, Iran
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Lee SG, Chae J, Woo SM, Seo SU, Kim HJ, Kim SY, Schlaepfer DD, Kim IS, Park HS, Kwon TK, Nam JO. TGFBI remodels adipose metabolism by regulating the Notch-1 signaling pathway. Exp Mol Med 2023; 55:520-531. [PMID: 36854775 PMCID: PMC10073093 DOI: 10.1038/s12276-023-00947-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 12/17/2022] [Accepted: 01/17/2023] [Indexed: 03/02/2023] Open
Abstract
Extracellular matrix proteins are associated with metabolically healthy adipose tissue and regulate inflammation, fibrosis, angiogenesis, and subsequent metabolic deterioration. In this study, we demonstrated that transforming growth factor-beta (TGFBI), an extracellular matrix (ECM) component, plays an important role in adipose metabolism and browning during high-fat diet-induced obesity. TGFBI KO mice were resistant to adipose tissue hypertrophy, liver steatosis, and insulin resistance. Furthermore, adipose tissue from TGFBI KO mice contained a large population of CD11b+ and CD206+ M2 macrophages, which possibly control adipokine secretion through paracrine mechanisms. Mechanistically, we showed that inhibiting TGFBI-stimulated release of adipsin by Notch-1-dependent signaling resulted in adipocyte browning. TGFBI was physiologically bound to Notch-1 and stimulated its activation in adipocytes. Our findings revealed a novel protective effect of TGFBI deficiency in obesity that is realized via the activation of the Notch-1 signaling pathway.
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Affiliation(s)
- Seul Gi Lee
- Department of Food Science and Biotechnology, Kyungpook National University, Daegu, 41566, Republic of Korea
- Department of Immunology, School of Medicine, Keimyung University, Daegu, 42601, Republic of Korea
| | - Jongbeom Chae
- Department of Food Science and Biotechnology, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Seon Min Woo
- Department of Immunology, School of Medicine, Keimyung University, Daegu, 42601, Republic of Korea
| | - Seung Un Seo
- Department of Immunology, School of Medicine, Keimyung University, Daegu, 42601, Republic of Korea
| | - Ha-Jeong Kim
- Department of Physiology, School of Medicine, Kyungpook National University, Daegu, 41944, Republic of Korea
| | - Sang-Yeob Kim
- ASAN Institute for Life Sciences, ASAN Medical Center, Seoul, 05505, Republic of Korea
| | - David D Schlaepfer
- Moores Cancer Center, University of California, San Diego, La Jolla, CA, 92093, USA
| | - In-San Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
- Center for Theragnosis, Biomedical Research Institute, Korea Institute Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Hee-Sae Park
- School of Biological Sciences and Technology, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Taeg Kyu Kwon
- Department of Immunology, School of Medicine, Keimyung University, Daegu, 42601, Republic of Korea.
- Center for Forensic Pharmaceutical Science, Keimyung University, Daegu, 42601, Republic of Korea.
| | - Ju-Ock Nam
- Department of Food Science and Biotechnology, Kyungpook National University, Daegu, 41566, Republic of Korea.
- Research Institute of Tailored Food Technology, Kyungpook National University, Daegu, 41566, Republic of Korea.
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Kahn D, Macias E, Zarini S, Garfield A, Zemski Berry K, MacLean P, Gerszten RE, Libby A, Solt C, Schoen J, Bergman BC. Exploring Visceral and Subcutaneous Adipose Tissue Secretomes in Human Obesity: Implications for Metabolic Disease. Endocrinology 2022; 163:6678177. [PMID: 36036084 PMCID: PMC9761573 DOI: 10.1210/endocr/bqac140] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Indexed: 11/19/2022]
Abstract
Adipose tissue secretions are depot-specific and vary based on anatomical location. Considerable attention has been focused on visceral (VAT) and subcutaneous (SAT) adipose tissue with regard to metabolic disease, yet our knowledge of the secretome from these depots is incomplete. We conducted a comprehensive analysis of VAT and SAT secretomes in the context of metabolic function. Conditioned media generated using SAT and VAT explants from individuals with obesity were analyzed using proteomics, mass spectrometry, and multiplex assays. Conditioned media were administered in vitro to rat hepatocytes and myotubes to assess the functional impact of adipose tissue signaling on insulin responsiveness. VAT secreted more cytokines (IL-12p70, IL-13, TNF-α, IL-6, and IL-8), adipokines (matrix metalloproteinase-1, PAI-1), and prostanoids (TBX2, PGE2) compared with SAT. Secretome proteomics revealed differences in immune/inflammatory response and extracellular matrix components. In vitro, VAT-conditioned media decreased hepatocyte and myotube insulin sensitivity, hepatocyte glucose handling, and increased basal activation of inflammatory signaling in myotubes compared with SAT. Depot-specific differences in adipose tissue secretome composition alter paracrine and endocrine signaling. The unique secretome of VAT has distinct and negative impact on hepatocyte and muscle insulin action.
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Affiliation(s)
- Darcy Kahn
- Division of Endocrinology, Metabolism and Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Emily Macias
- Division of Endocrinology, Metabolism and Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Simona Zarini
- Division of Endocrinology, Metabolism and Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Amanda Garfield
- Division of Endocrinology, Metabolism and Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Karin Zemski Berry
- Division of Endocrinology, Metabolism and Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Paul MacLean
- Division of Endocrinology, Metabolism and Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Robert E Gerszten
- The Cardiovascular Research Center and Cardiology Division, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Andrew Libby
- Division of Endocrinology, Metabolism and Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Claudia Solt
- Division of Endocrinology, Metabolism and Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Jonathan Schoen
- Department of Surgery, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Bryan C Bergman
- Correspondence: Bryan Bergman, PhD, Division of Endocrinology, Diabetes, and Metabolism, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA.
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11
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Liu J, Zhang Y, Zhou Y, Wang QQ, Ding K, Zhao S, Lu P, Liu JL. Cytoophidia coupling adipose architecture and metabolism. Cell Mol Life Sci 2022; 79:534. [PMID: 36180607 DOI: 10.1007/s00018-022-04567-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 09/19/2022] [Accepted: 09/20/2022] [Indexed: 01/05/2023]
Abstract
Tissue architecture determines its unique physiology and function. How these properties are intertwined has remained unclear. Here we show that the metabolic enzyme CTP synthase (CTPS) form filamentous structures termed cytoophidia along the adipocyte cortex in Drosophila adipose tissue. Loss of cytoophidia, whether due to reduced CTPS expression or a point mutation that specifically abrogates its polymerization ability, causes impaired adipocyte adhesion and defective adipose tissue architecture. Moreover, CTPS influences integrin distribution and dot-like deposition of type IV collagen (Col IV). Col IV-integrin signaling reciprocally regulates the assembly of cytoophidia in adipocytes. Our results demonstrate that a positive feedback signaling loop containing both cytoophidia and integrin adhesion complex couple tissue architecture and metabolism in Drosophila adipose tissue.
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Affiliation(s)
- Jingnan Liu
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Yuanbing Zhang
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China.,Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Youfang Zhou
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China.,Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Qiao-Qi Wang
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China.,Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Kang Ding
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China.,iHuman Institute, ShanghaiTech University, Shanghai, China
| | - Suwen Zhao
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China.,iHuman Institute, ShanghaiTech University, Shanghai, China
| | - Pengfei Lu
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Ji-Long Liu
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China. .,Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, OX1 3PT, UK.
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12
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Hughey CC, Puchalska P, Crawford PA. Integrating the contributions of mitochondrial oxidative metabolism to lipotoxicity and inflammation in NAFLD pathogenesis. Biochim Biophys Acta Mol Cell Biol Lipids 2022; 1867:159209. [DOI: 10.1016/j.bbalip.2022.159209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 06/25/2022] [Accepted: 07/27/2022] [Indexed: 11/28/2022]
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13
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Formulation and Characterization of O/W Nanoemulsions of Hemp Seed Oil for Protection from Steatohepatitis: Analysis of Hepatic Free Fatty Acids and Oxidation Markers. Pharmaceuticals (Basel) 2022; 15:ph15070864. [PMID: 35890162 PMCID: PMC9316199 DOI: 10.3390/ph15070864] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/30/2022] [Accepted: 07/05/2022] [Indexed: 12/04/2022] Open
Abstract
Non-alcoholic steatohepatitis (NASH) is a common type of metabolic liver disease which is characterized by fatty changes associated with hepatocyte injury, lobular inflammation, and/or liver fibrosis. Nanoemulsions are kinetically stable colloidal systems characterized by small droplet size. Hemp seed oil is a natural oil derived from Cannabis sativa seeds. The current study was designed to formulate nanoemulsion preparations of hemp seed oil with promising enhanced biological activity against high fat (HF) diet induced NASH in rats. Four nanoemulsion formulas (NEFs) were formulated based on high-pressure homogenization technique and evaluated for droplet size, zeta potential (ZP), polydispersity index (PDI), electrical conductivity, pH, and viscosity, as well as the preparation stability. The best NEF was selected to perform an in vivo rat study; selection was based on the smallest droplet size and highest physical stability. Results showed that NEF#4 showed the best physiochemical characters among the other preparations. Twenty male rats were assigned to four groups as follows: normal, NASH control, NASH + hemp seed oil and NASH + hemp seed oil NEF4. The rats were tested for body weight (BWt) change, insulin resistance (IR) and hepatic pathology. The hemp seed NEF#4 protected against NASH progression in rats and decreased the % of BWt gain compared to the original Hemp seed oil. NEF#4 of Hemp seed oil showed greater protective activity against experimental NASH and IR in rats. Hence, we can consider the nanoemulsion preparations as a useful tool for enhancing the biological action of the hemp seed oil, and further studies are warranted for application of this technique for preparing natural oils aiming at enhancing their activities.
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14
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Stocks B, Gonzalez-Franquesa A, Borg ML, Björnholm M, Niu L, Zierath JR, Deshmukh AS. Integrated liver and plasma proteomics in obese mice reveals complex metabolic regulation. Mol Cell Proteomics 2022; 21:100207. [PMID: 35093608 PMCID: PMC8928073 DOI: 10.1016/j.mcpro.2022.100207] [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: 12/23/2021] [Accepted: 01/23/2022] [Indexed: 11/28/2022] Open
Abstract
Obesity leads to the development of nonalcoholic fatty liver disease (NAFLD) and associated alterations to the plasma proteome. To elucidate the underlying changes associated with obesity, we performed liquid chromatography–tandem mass spectrometry in the liver and plasma of obese leptin-deficient ob/ob mice and integrated these data with publicly available transcriptomic and proteomic datasets of obesity and metabolic diseases in preclinical and clinical cohorts. We quantified 7173 and 555 proteins in the liver and plasma proteomes, respectively. The abundance of proteins related to fatty acid metabolism were increased, alongside peroxisomal proliferation in ob/ob liver. Putatively secreted proteins and the secretory machinery were also dysregulated in the liver, which was mirrored by a substantial alteration of the plasma proteome. Greater than 50% of the plasma proteins were differentially regulated, including NAFLD biomarkers, lipoproteins, the 20S proteasome, and the complement and coagulation cascades of the immune system. Integration of the liver and plasma proteomes identified proteins that were concomitantly regulated in the liver and plasma in obesity, suggesting that the systemic abundance of these plasma proteins is regulated by secretion from the liver. Many of these proteins are systemically regulated during type 2 diabetes and/or NAFLD in humans, indicating the clinical importance of liver–plasma cross talk and the relevance of our investigations in ob/ob mice. Together, these analyses yield a comprehensive insight into obesity and provide an extensive resource for obesity research in a prevailing model organism. Proteomics reveals liver-derived proteins systemically dysregulated in obesity. Obesity increases hepatic lipid metabolism via peroxisomal biogenesis. Obesity dysregulates secretory machinery and secreted proteins within the liver. Metabolic and immune proteins dysregulated in plasma of obese mice. Comparative proteomics of high-fat diet and monogenic (ob/ob) models of obesity.
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15
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Bruce CR, Hamley S, Ang T, Howlett KF, Shaw CS, Kowalski GM. Translating glucose tolerance data from mice to humans: Insights from stable isotope labelled glucose tolerance tests. Mol Metab 2021; 53:101281. [PMID: 34175474 PMCID: PMC8313600 DOI: 10.1016/j.molmet.2021.101281] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/18/2021] [Accepted: 06/19/2021] [Indexed: 11/29/2022] Open
Abstract
Objective The glucose tolerance test (GTT) is widely used in human and animal biomedical and pharmaceutical research. Despite its prevalent use, particularly in mouse metabolic phenotyping, to the best of our knowledge we are not aware of any studies that have attempted to qualitatively compare the metabolic events during a GTT in mice with those performed in humans. Methods Stable isotope labelled oral glucose tolerance tests (siOGTTs; [6,6-2H2]glucose) were performed in both human and mouse cohorts to provide greater resolution into postprandial glucose kinetics. The siOGTT allows for the partitioning of circulating glucose into that derived from exogenous and endogenous sources. Young adults spanning the spectrum of normal glucose tolerance (n = 221), impaired fasting (n = 14), and impaired glucose tolerance (n = 19) underwent a 75g siOGTT, whereas a 50 mg siOGTT was performed on chow (n = 43) and high-fat high-sucrose fed C57Bl6 male mice (n = 46). Results During the siOGTT in humans, there is a long period (>3hr) of glucose absorption and, accordingly, a large, sustained insulin response and robust suppression of lipolysis and endogenous glucose production (EGP), even in the presence of glucose intolerance. In contrast, mice appear to be highly reliant on glucose effectiveness to clear exogenous glucose and experience only modest, transient insulin responses with little, if any, suppression of EGP. In addition to the impaired stimulation of glucose uptake, mice with the worst glucose tolerance appear to have a paradoxical and persistent rise in EGP during the OGTT, likely related to handling stress. Conclusions The metabolic response to the OGTT in mice and humans is highly divergent. The potential reasons for these differences and their impact on the interpretation of mouse glucose tolerance data and their translation to humans are discussed. We compared the mechanisms governing glucose handling in humans and mice. Humans and mice underwent stable isotope labelled oral glucose tolerance tests. Metabolic responses between humans and mice were highly divergent. Unlike humans, most mice exhibit little EGP suppression or insulin response.
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Affiliation(s)
- Clinton R Bruce
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Science, Deakin University, Geelong, Waurn Ponds, Victoria, 3216, Australia
| | - Steven Hamley
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Science, Deakin University, Geelong, Waurn Ponds, Victoria, 3216, Australia
| | - Teddy Ang
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Science, Deakin University, Geelong, Waurn Ponds, Victoria, 3216, Australia
| | - Kirsten F Howlett
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Science, Deakin University, Geelong, Waurn Ponds, Victoria, 3216, Australia
| | - Christopher S Shaw
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Science, Deakin University, Geelong, Waurn Ponds, Victoria, 3216, Australia
| | - Greg M Kowalski
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Science, Deakin University, Geelong, Waurn Ponds, Victoria, 3216, Australia; Metabolic Research Unit, School of Medicine, Deakin University, Geelong, Waurn Ponds, Victoria, 3216, Australia.
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16
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Abstract
Integrin linked kinase (ILK) is a vital signaling protein ubiquitously expressed throughout the body. It binds to intracellular integrins to help promote signaling related to cell adhesion, apoptosis, proliferation, migration, and a plethora of other common cellular functions. In this review, ILKs role in the liver is detailed. Studies have shown ILK to be a major participant in hepatic ECM organization, liver regeneration, insulin resistance, and hepatocellular carcinoma.
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Affiliation(s)
- Nicole Martucci
- Department of Pathology, University of Pittsburgh School of MedicinePittsburgh, PAUSA
| | | | - Wendy M Mars
- Department of Pathology, University of Pittsburgh School of MedicinePittsburgh, PAUSA
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17
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Datta R, Lizama CO, Soltani AK, Mckleroy W, Podolsky MJ, Yang CD, Huynh TL, Cautivo KM, Wang B, Koliwad SK, Abumrad NA, Atabai K. Autoregulation of insulin receptor signaling through MFGE8 and the αvβ5 integrin. Proc Natl Acad Sci U S A 2021; 118:e2102171118. [PMID: 33903257 PMCID: PMC8106306 DOI: 10.1073/pnas.2102171118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The role of integrins, in particular αv integrins, in regulating insulin resistance is incompletely understood. We have previously shown that the αvβ5 integrin ligand milk fat globule epidermal growth factor like 8 (MFGE8) regulates cellular uptake of fatty acids. In this work, we evaluated the impact of MFGE8 on glucose homeostasis. We show that acute blockade of the MFGE8/β5 pathway enhances while acute augmentation dampens insulin-stimulated glucose uptake. Moreover, we find that insulin itself induces cell-surface enrichment of MFGE8 in skeletal muscle, which then promotes interaction between the αvβ5 integrin and the insulin receptor leading to dampening of skeletal-muscle insulin receptor signaling. Blockade of the MFGE8/β5 pathway also enhances hepatic insulin sensitivity. Our work identifies an autoregulatory mechanism by which insulin-stimulated signaling through its cognate receptor is terminated through up-regulation of MFGE8 and its consequent interaction with the αvβ5 integrin, thereby establishing a pathway that can potentially be targeted to improve insulin sensitivity.
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Affiliation(s)
- Ritwik Datta
- Cardiovascular Research Institute, University of California, San Francisco, CA 94158
| | - Carlos O Lizama
- Cardiovascular Research Institute, University of California, San Francisco, CA 94158
| | - Amin K Soltani
- Cardiovascular Research Institute, University of California, San Francisco, CA 94158
- Lung Biology Center, University of California, San Francisco, CA 94158
| | - William Mckleroy
- Cardiovascular Research Institute, University of California, San Francisco, CA 94158
- Lung Biology Center, University of California, San Francisco, CA 94158
- Divisions of Pulmonary and Critical Care and Endocrinology, Department of Medicine, University of California, San Francisco, CA 94143
| | - Michael J Podolsky
- Cardiovascular Research Institute, University of California, San Francisco, CA 94158
- Divisions of Pulmonary and Critical Care and Endocrinology, Department of Medicine, University of California, San Francisco, CA 94143
| | - Christopher D Yang
- Cardiovascular Research Institute, University of California, San Francisco, CA 94158
| | - Tony L Huynh
- Department of Radiology and Biomedical imaging, University of California, San Francisco, CA 94107
| | - Kelly M Cautivo
- Department of Laboratory Medicine, University of California, San Francisco, CA 94143
| | - Biao Wang
- Cardiovascular Research Institute, University of California, San Francisco, CA 94158
- Department of Physiology, University of California, San Francisco, CA 94158
| | - Suneil K Koliwad
- Divisions of Pulmonary and Critical Care and Endocrinology, Department of Medicine, University of California, San Francisco, CA 94143
- Diabetes Center, University of California, San Francisco, CA 94143
| | - Nada A Abumrad
- Diabetes Research Center, Department of Medicine and Cell Biology, Washington University in St. Louis, St. Louis, MO 63110
| | - Kamran Atabai
- Cardiovascular Research Institute, University of California, San Francisco, CA 94158;
- Lung Biology Center, University of California, San Francisco, CA 94158
- Divisions of Pulmonary and Critical Care and Endocrinology, Department of Medicine, University of California, San Francisco, CA 94143
- Department of Physiology, University of California, San Francisco, CA 94158
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18
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de las Heras-Saldana S, Chung KY, Kim H, Lim D, Gondro C, van der Werf JHJ. Differential Gene Expression in Longissimus Dorsi Muscle of Hanwoo Steers-New Insight in Genes Involved in Marbling Development at Younger Ages. Genes (Basel) 2020; 11:genes11111381. [PMID: 33233382 PMCID: PMC7700136 DOI: 10.3390/genes11111381] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 11/06/2020] [Accepted: 11/19/2020] [Indexed: 12/25/2022] Open
Abstract
The Korean Hanwoo breed possesses a high capacity to accumulate intramuscular fat, which is measured as a marbling score in the beef industry. Unfortunately, the development of marbling is not completely understood and the identification of differentially expressed genes at an early age is required to better understand this trait. In this study, we took muscle samples from 12 Hanwoo steers at the age of 18 and 30 months. From the contrast between age and marbling score, we identified in total 1883 differentially expressed genes (FDR < 0.05 and logarithm fold change ≥ 1.5) with 782 genes up-regulated and 1101 down-regulated. Differences in gene expression were higher between the ages x marbling groups rather than between high and low marbling groups. At 18 months of age, the genes SLC38A4, ABCA10, APOL6, and two novel genes (ENSBTAG00000015330 and ENSBTAG00000046041) were up-regulated in the high marbling group. From the protein–protein interaction network analysis, we identified unique networks when comparing marbling scores between different ages. Nineteen genes (AGT, SERPINE1, ADORA1, FOS, LEP, FOXO1, FOXO3, ADIPOQ, ITGA1, SDC1, SDC4, ITGB3, ITGB4, CXCL10, ACTG2, MX1, EDN1, ACTA2, and ESPL1) were identified to have an important role in marbling development. Further analyses are needed to better understand the role of these genes.
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Affiliation(s)
- Sara de las Heras-Saldana
- School of Environmental and Rural Science, University of New England, Armidale 2351, NSW, Australia; (H.K.); (C.G.); (J.H.J.v.d.W.)
- Correspondence:
| | - Ki Yong Chung
- Department of Beef Science, Korea National College of Agriculture and Fisheries, Jeonju 54874, Korea;
| | - Hyounju Kim
- School of Environmental and Rural Science, University of New England, Armidale 2351, NSW, Australia; (H.K.); (C.G.); (J.H.J.v.d.W.)
- Hanwoo Research Institute, National Institute of Animal Science, Pyeongchang 25340, Korea
| | - Dajeong Lim
- Animal Genomics & Bioinformatics Division, National Institute of Animal Science, Jeonbuk 55365, Korea;
| | - Cedric Gondro
- School of Environmental and Rural Science, University of New England, Armidale 2351, NSW, Australia; (H.K.); (C.G.); (J.H.J.v.d.W.)
- College of Agriculture & Resources, Department of Animal Science, Michigan State University, East Lansing, MI 48824, USA
| | - Julius H. J. van der Werf
- School of Environmental and Rural Science, University of New England, Armidale 2351, NSW, Australia; (H.K.); (C.G.); (J.H.J.v.d.W.)
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Bourgot I, Primac I, Louis T, Noël A, Maquoi E. Reciprocal Interplay Between Fibrillar Collagens and Collagen-Binding Integrins: Implications in Cancer Progression and Metastasis. Front Oncol 2020; 10:1488. [PMID: 33014790 PMCID: PMC7461916 DOI: 10.3389/fonc.2020.01488] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 07/13/2020] [Indexed: 12/14/2022] Open
Abstract
Cancers are complex ecosystems composed of malignant cells embedded in an intricate microenvironment made of different non-transformed cell types and extracellular matrix (ECM) components. The tumor microenvironment is governed by constantly evolving cell-cell and cell-ECM interactions, which are now recognized as key actors in the genesis, progression and treatment of cancer lesions. The ECM is composed of a multitude of fibrous proteins, matricellular-associated proteins, and proteoglycans. This complex structure plays critical roles in cancer progression: it functions as the scaffold for tissues organization and provides biochemical and biomechanical signals that regulate key cancer hallmarks including cell growth, survival, migration, differentiation, angiogenesis, and immune response. Cells sense the biochemical and mechanical properties of the ECM through specialized transmembrane receptors that include integrins, discoidin domain receptors, and syndecans. Advanced stages of several carcinomas are characterized by a desmoplastic reaction characterized by an extensive deposition of fibrillar collagens in the microenvironment. This compact network of fibrillar collagens promotes cancer progression and metastasis, and is associated with low survival rates for cancer patients. In this review, we highlight how fibrillar collagens and their corresponding integrin receptors are modulated during cancer progression. We describe how the deposition and alignment of collagen fibers influence the tumor microenvironment and how fibrillar collagen-binding integrins expressed by cancer and stromal cells critically contribute in cancer hallmarks.
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Affiliation(s)
| | | | | | | | - Erik Maquoi
- Laboratory of Tumor and Development Biology, GIGA-Cancer, University of Liège, Liège, Belgium
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20
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Influence of the integrin alpha-1 subunit and its relationship with high-fat diet upon extracellular matrix synthesis in skeletal muscle and tendon. Cell Tissue Res 2020; 381:177-187. [PMID: 32112256 DOI: 10.1007/s00441-020-03184-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 01/29/2020] [Indexed: 10/24/2022]
Abstract
Integrins are important for mechanosensation in tissue and play, together with nutrition, a role in regulating extracellular matrix (ECM) in skeletal muscle and tendon. Integrin receptors are dimers that consist of an α and β subunit and bridge extracellular and intracellular signals. The present study investigates whether the deletion of the integrin receptor α1 subunit influences collagen and other matrix proteins in the musculotendinous tissue and whether it causes any compensatory changes in other integrin subunits in C57BL/6J mice. In addition, we study whether a high-fat diet (HFD) influences these responses in muscle or tendon. Mice on a HFD had a higher number of non-enzymatic cross-links in skeletal muscle ECM and increased gene expression of collagen and other extracellular matrix proteins. In contrast to gene expression, total collagen protein content was decreased by HFD in the muscle with no change in tendon. Integrin α1 subunit knockout resulted in a decrease of collagen type I and III, TGF-β1 and IGF-1 gene expression in muscle of HFD mice but did not affect total collagen protein compared with wild-type (WT) littermates in either muscle or tendon. There was no compensatory increase in the genes that express other integrin subunits. In conclusion, HFD induced a significant increase in expression of ECM genes in muscle. On the protein level, HFD resulted in a lower collagen content in muscle. Tendons were unaffected by the diet. Deletion of the integrin α1 subunit did not affect collagen protein or gene expression in muscle or tendon.
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21
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Wu N, Huang J, Zhang XF, Ou-Yang L, He S, Zhu Z, Xie W. Weighted Fused Pathway Graphical Lasso for Joint Estimation of Multiple Gene Networks. Front Genet 2019; 10:623. [PMID: 31396259 PMCID: PMC6662592 DOI: 10.3389/fgene.2019.00623] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 06/13/2019] [Indexed: 01/17/2023] Open
Abstract
Gene regulatory networks (GRNs) are often inferred based on Gaussian graphical models that could identify the conditional dependence among genes by estimating the corresponding precision matrix. Classical Gaussian graphical models are usually designed for single network estimation and ignore existing knowledge such as pathway information. Therefore, they can neither make use of the common information shared by multiple networks, nor can they utilize useful prior information to guide the estimation. In this paper, we propose a new weighted fused pathway graphical lasso (WFPGL) to jointly estimate multiple networks by incorporating prior knowledge derived from known pathways and gene interactions. Based on the assumption that two genes are less likely to be connected if they do not participate together in any pathways, a pathway-based constraint is considered in our model. Moreover, we introduce a weighted fused lasso penalty in our model to take into account prior gene interaction data and common information shared by multiple networks. Our model is optimized based on the alternating direction method of multipliers (ADMM). Experiments on synthetic data demonstrate that our method outperforms other five state-of-the-art graphical models. We then apply our model to two real datasets. Hub genes in our identified state-specific networks show some shared and specific patterns, which indicates the efficiency of our model in revealing the underlying mechanisms of complex diseases.
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Affiliation(s)
- Nuosi Wu
- College of Electronics and Information Engineering, Shenzhen University, Shenzhen, China
| | - Jiang Huang
- College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, China
| | - Xiao-Fei Zhang
- School of Mathematics and Statistics, Central China Normal University, Wuhan, China
| | - Le Ou-Yang
- Guangdong Key Laboratory of Intelligent Information Processing and Shenzhen Key Laboratory of Media Security, College of Electronics and Information Engineering, Shenzhen University, Shenzhen, China
- Shenzhen Institute of Artificial Intelligence and Robotics for Society, Shenzhen, China
| | - Shan He
- School of Computer Science, University of Birmingham, Birmingham, United Kingdom
| | - Zexuan Zhu
- College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, China
| | - Weixin Xie
- College of Electronics and Information Engineering, Shenzhen University, Shenzhen, China
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22
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Shang W, Li H, Strappe P, Zhou Z, Blanchard C. Konjac glucomannans attenuate diet-induced fat accumulation on livers and its regulation pathway. J Funct Foods 2019. [DOI: 10.1016/j.jff.2018.11.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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23
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Ma Q, Song J, Ma H, Gao K, Yang Y, He N. Synergistic anticancer effect of Grb2 and ITGA1 on cancer cells highly expressing Grb2 through suppressing ERK phosphorylation. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2019; 12:182-189. [PMID: 31933732 PMCID: PMC6944030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Accepted: 10/25/2018] [Indexed: 06/10/2023]
Abstract
BACKGROUND Growth factor receptor bound protein 2 (Grb2) is known to be an adaptor protein that provides a critical link between cell surface growth factor receptors and the MAPK signaling. It was shown that high expression of Grb2 enhances cancer cells proliferation, invasion and malignant transformation. OBJECTIVE In this study, we aimed to systemically understand the function of Grb2 in cancer. METHODS The expression of Grb2 in different cancer cell lines was examined from a publicly available database and we chose two cancer cell lines highly expressing Grb2 to investigate the role of Grb2. To systemically understand the function of Grb2 in cancer cells, proteomic profiles also were analyzed. RESULT The results suggested that downregulation of Grb2 reduced cell proliferation in Hela cells and Jurkat cells. In addition, knockdown of Grb2 reduced the expression of ITGA1 and inhibited the phosphorylation of ERK. Intriguingly, simultaneous inhibition of Grb2 and ITGA1 resulted in a greater inhibition of phosphorylated ERK than either inhibition of Grb2 or ITGA1, and thus triggered marked apoptosis in Hela cells and Jurkat cells. These results suggest a synergistic anticancer effect of Grb2 and ITGA1 mediated by the ERK pathway in cancer cells highly expressing Grb2. In conclusion, we provided evidence that inhibition of Grb2 and ITGA1 might be an attractive target for therapeutic intervention against the cancer growth of cancers with high Grb2 expression.
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Affiliation(s)
- Qingxia Ma
- School of Basic Medical Sciences, Qingdao UniversityQingdao, China
| | - Jingyi Song
- School of Basic Medical Sciences, Qingdao UniversityQingdao, China
| | - Hailong Ma
- School of Electrical Engineering and Automation, Qilu University of Technology (Shandong Academy of Science)Jinan, China
| | - Kaixuan Gao
- Department of Blood Transfusion, The Affiliated Hospital of Qingdao UniversityQingdao, China
| | - Yuecheng Yang
- Department of Pharmacy, Zibo Maternal and Child Health HospitalZibo, China
| | - Ningning He
- School of Basic Medical Sciences, Qingdao UniversityQingdao, China
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24
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Grarup N, Moltke I, Andersen MK, Bjerregaard P, Larsen CVL, Dahl-Petersen IK, Jørsboe E, Tiwari HK, Hopkins SE, Wiener HW, Boyer BB, Linneberg A, Pedersen O, Jørgensen ME, Albrechtsen A, Hansen T. Identification of novel high-impact recessively inherited type 2 diabetes risk variants in the Greenlandic population. Diabetologia 2018; 61:2005-2015. [PMID: 29926116 PMCID: PMC6096637 DOI: 10.1007/s00125-018-4659-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 05/03/2018] [Indexed: 12/21/2022]
Abstract
AIMS/HYPOTHESIS In a recent study using a standard additive genetic model, we identified a TBC1D4 loss-of-function variant with a large recessive impact on risk of type 2 diabetes in Greenlanders. The aim of the current study was to identify additional genetic variation underlying type 2 diabetes using a recessive genetic model, thereby increasing the power to detect variants with recessive effects. METHODS We investigated three cohorts of Greenlanders (B99, n = 1401; IHIT, n = 3115; and BBH, n = 547), which were genotyped using Illumina MetaboChip. Of the 4674 genotyped individuals passing quality control, 4648 had phenotype data available, and type 2 diabetes association analyses were performed for 317 individuals with type 2 diabetes and 2631 participants with normal glucose tolerance. Statistical association analyses were performed using a linear mixed model. RESULTS Using a recessive genetic model, we identified two novel loci associated with type 2 diabetes in Greenlanders, namely rs870992 in ITGA1 on chromosome 5 (OR 2.79, p = 1.8 × 10-8), and rs16993330 upstream of LARGE1 on chromosome 22 (OR 3.52, p = 1.3 × 10-7). The LARGE1 variant did not reach the conventional threshold for genome-wide significance (p < 5 × 10-8) but did withstand a study-wide Bonferroni-corrected significance threshold. Both variants were common in Greenlanders, with minor allele frequencies of 23% and 16%, respectively, and were estimated to have large recessive effects on risk of type 2 diabetes in Greenlanders, compared with additively inherited variants previously observed in European populations. CONCLUSIONS/INTERPRETATION We demonstrate the value of using a recessive genetic model in a historically small and isolated population to identify genetic risk variants. Our findings give new insights into the genetic architecture of type 2 diabetes, and further support the existence of high-effect genetic risk factors of potential clinical relevance, particularly in isolated populations. DATA AVAILABILITY The Greenlandic MetaboChip-genotype data are available at European Genome-Phenome Archive (EGA; https://ega-archive.org/ ) under the accession EGAS00001002641.
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Affiliation(s)
- Niels Grarup
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, 2200, Copenhagen, Denmark
| | - Ida Moltke
- The Bioinformatics Centre, Department of Biology, University of Copenhagen, Ole Maaløes Vej 5, 2200, Copenhagen, Denmark
| | - Mette K Andersen
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, 2200, Copenhagen, Denmark
| | - Peter Bjerregaard
- National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark
- Greenland Centre for Health Research, University of Greenland, Nuuk, Greenland
| | - Christina V L Larsen
- National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark
- Greenland Centre for Health Research, University of Greenland, Nuuk, Greenland
| | - Inger K Dahl-Petersen
- National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark
| | - Emil Jørsboe
- The Bioinformatics Centre, Department of Biology, University of Copenhagen, Ole Maaløes Vej 5, 2200, Copenhagen, Denmark
| | - Hemant K Tiwari
- Department of Biostatistics, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Scarlett E Hopkins
- Center for Alaska Native Health Research, University of Alaska Fairbanks, Fairbanks, AK, USA
| | - Howard W Wiener
- Department of Epidemiology, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Bert B Boyer
- Center for Alaska Native Health Research, University of Alaska Fairbanks, Fairbanks, AK, USA
| | - Allan Linneberg
- Center for Clinical Research and Prevention, Bispebjerg and Frederiksberg Hospital, The Capital Region, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Oluf Pedersen
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, 2200, Copenhagen, Denmark
| | - Marit E Jørgensen
- National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark
- Greenland Centre for Health Research, University of Greenland, Nuuk, Greenland
- Steno Diabetes Center Copenhagen, Gentofte, Denmark
| | - Anders Albrechtsen
- The Bioinformatics Centre, Department of Biology, University of Copenhagen, Ole Maaløes Vej 5, 2200, Copenhagen, Denmark.
| | - Torben Hansen
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, 2200, Copenhagen, Denmark.
- Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark.
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25
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Hepatic Dysfunction Caused by Consumption of a High-Fat Diet. Cell Rep 2018; 21:3317-3328. [PMID: 29241556 DOI: 10.1016/j.celrep.2017.11.059] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 11/11/2017] [Accepted: 11/16/2017] [Indexed: 12/16/2022] Open
Abstract
Obesity is a major human health crisis that promotes insulin resistance and, ultimately, type 2 diabetes. The molecular mechanisms that mediate this response occur across many highly complex biological regulatory levels that are incompletely understood. Here, we present a comprehensive molecular systems biology study of hepatic responses to high-fat feeding in mice. We interrogated diet-induced epigenomic, transcriptomic, proteomic, and metabolomic alterations using high-throughput omic methods and used a network modeling approach to integrate these diverse molecular signals. Our model indicated that disruption of hepatic architecture and enhanced hepatocyte apoptosis are among the numerous biological processes that contribute to early liver dysfunction and low-grade inflammation during the development of diet-induced metabolic syndrome. We validated these model findings with additional experiments on mouse liver sections. In total, we present an integrative systems biology study of diet-induced hepatic insulin resistance that uncovered molecular features promoting the development and maintenance of metabolic disease.
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26
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Abstract
The frequency of prediabetes is increasing as the prevalence of obesity rises worldwide. In prediabetes, hyperglycemia, insulin resistance, and inflammation and metabolic derangements associated with concomitant obesity cause endothelial vasodilator and fibrinolytic dysfunction, leading to increased risk of cardiovascular and renal disease. Importantly, the microvasculature affects insulin sensitivity by affecting the delivery of insulin and glucose to skeletal muscle; thus, endothelial dysfunction and extracellular matrix remodeling promote the progression from prediabetes to diabetes mellitus. Weight loss is the mainstay of treatment in prediabetes, but therapies that improved endothelial function and vasodilation may not only prevent cardiovascular disease but also slow progression to diabetes mellitus.
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Affiliation(s)
- David H Wasserman
- From the Departments of Molecular Physiology and Biophysics (D.H.W.) and Medicine (T.J.W., N.J.B.), Vanderbilt University Medical Center, Nashville, TN
| | - Thomas J Wang
- From the Departments of Molecular Physiology and Biophysics (D.H.W.) and Medicine (T.J.W., N.J.B.), Vanderbilt University Medical Center, Nashville, TN
| | - Nancy J Brown
- From the Departments of Molecular Physiology and Biophysics (D.H.W.) and Medicine (T.J.W., N.J.B.), Vanderbilt University Medical Center, Nashville, TN.
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27
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Insulin action and resistance in obesity and type 2 diabetes. Nat Med 2017; 23:804-814. [PMID: 28697184 DOI: 10.1038/nm.4350] [Citation(s) in RCA: 769] [Impact Index Per Article: 109.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 05/11/2017] [Indexed: 12/12/2022]
Abstract
Nutritional excess is a major forerunner of type 2 diabetes. It enhances the secretion of insulin, but attenuates insulin's metabolic actions in the liver, skeletal muscle and adipose tissue. However, conflicting evidence indicates a lack of knowledge of the timing of these events during the development of obesity and diabetes, pointing to a key gap in our understanding of metabolic disease. This Perspective reviews alternate viewpoints and recent results on the temporal and mechanistic connections between hyperinsulinemia, obesity and insulin resistance. Although much attention has addressed early steps in the insulin signaling cascade, insulin resistance in obesity seems to be largely elicited downstream of these steps. New findings also connect insulin resistance to extensive metabolic cross-talk between the liver, adipose tissue, pancreas and skeletal muscle. These and other advances over the past 5 years offer exciting opportunities and daunting challenges for the development of new therapeutic strategies for the treatment of type 2 diabetes.
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28
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Kowalski GM, Kraakman MJ, Mason SA, Murphy AJ, Bruce CR. Resolution of glucose intolerance in long-term high-fat, high-sucrose-fed mice. J Endocrinol 2017; 233:269-279. [PMID: 28360081 DOI: 10.1530/joe-17-0004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 03/30/2017] [Indexed: 02/03/2023]
Abstract
The high-fat, high-sucrose diet (HFSD)-fed C57Bl/6 mouse is a widely used model of prediabetes. However, studies typically implement a relatively short dietary intervention lasting between 4 and 16 weeks; as a result, little is known about how a long-term HFSD influences the metabolic profile of these mice. Therefore, the aim of this investigation was to examine the effects of consuming a HFSD for 42 weeks on the development of hyperinsulinaemia and glucose intolerance in male C57Bl/6 mice. Two cohorts of HFSD mice were studied at independent institutes and they underwent an oral glucose tolerance test (OGTT) with measures of plasma insulin and free fatty acids (FFA). Age-matched chow-fed control mice were also studied. The HFSD-fed mice were hyperinsulinaemic and grossly obese, being over 25 g heavier than chow-fed mice, which was due to a marked expansion of subcutaneous adipose tissue. This was associated with a 3-fold increase in liver lipid content. Glucose tolerance, however, was either the same or better than control mice due to the preservation of glucose disposal as revealed by a dynamic stable isotope-labelled OGTT. In addition, plasma FFAs were suppressed to lower levels in HFSD mice during the OGTT. In conclusion, we have made the paradoxical observation that long-term HFSD feeding results in the resolution of glucose intolerance in the C57Bl/6 mouse. Mechanistically, we propose that the gross expansion of subcutaneous adipose tissue increases the glucose disposal capacity of the HFSD-fed mouse, which overcomes the prevailing insulin resistance to improve glucose tolerance.
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Affiliation(s)
- Greg M Kowalski
- Institute for Physical Activity and NutritionSchool of Exercise and Nutrition Sciences, Deakin University, Geelong, Victoria, Australia
| | - Michael J Kraakman
- Haematopoiesis and Leukocyte Biology LaboratoryBaker IDI Heart and Diabetes Institute, Melbourne, Victoria, Australia
- Department of MedicineColumbia University College of Physicians and Surgeons, New York, New York, USA
| | - Shaun A Mason
- Institute for Physical Activity and NutritionSchool of Exercise and Nutrition Sciences, Deakin University, Geelong, Victoria, Australia
| | - Andrew J Murphy
- Haematopoiesis and Leukocyte Biology LaboratoryBaker IDI Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Clinton R Bruce
- Institute for Physical Activity and NutritionSchool of Exercise and Nutrition Sciences, Deakin University, Geelong, Victoria, Australia
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29
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Williams AS, Trefts E, Lantier L, Grueter CA, Bracy DP, James FD, Pozzi A, Zent R, Wasserman DH. Integrin-Linked Kinase Is Necessary for the Development of Diet-Induced Hepatic Insulin Resistance. Diabetes 2017; 66:325-334. [PMID: 27899483 PMCID: PMC5248997 DOI: 10.2337/db16-0484] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 11/17/2016] [Indexed: 12/17/2022]
Abstract
The liver extracellular matrix (ECM) expands with high-fat (HF) feeding. This finding led us to address whether receptors for the ECM, integrins, are key to the development of diet-induced hepatic insulin resistance. Integrin-linked kinase (ILK) is a downstream integrin signaling molecule involved in multiple hepatic processes, including those related to differentiation, wound healing, and metabolism. We tested the hypothesis that deletion of ILK in mice on an HF diet would disrupt the ECM-integrin signaling axis, thereby preventing the transformation into the insulin-resistant liver. To determine the role of ILK in hepatic insulin action in vivo, male C57BL/6J ILKlox/lox mice were crossed with Albcre mice to produce a hepatocyte-specific ILK deletion (ILKlox/loxAlbcre). Results from this study show that hepatic ILK deletion has no effect on insulin action in lean mice but sensitizes the liver to insulin during the challenge of HF feeding. This effect corresponds to changes in the expression and activation of key insulin signaling pathways as well as a greater capacity for hepatic mitochondrial glucose oxidation. This demonstrates that ILK contributes to hepatic insulin resistance and highlights the previously undefined role of integrin signaling in the pathogenesis of diet-induced hepatic insulin resistance.
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Affiliation(s)
- Ashley S Williams
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN
| | - Elijah Trefts
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN
| | - Louise Lantier
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN
- Mouse Metabolic Phenotyping Center, Vanderbilt University, Nashville, TN
| | - Carrie A Grueter
- Department of Anesthesiology, Vanderbilt University, Nashville, TN
| | - Deanna P Bracy
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN
| | - Freyja D James
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN
| | - Ambra Pozzi
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN
- Division of Nephrology, Department of Medicine, Vanderbilt University, Nashville, TN
- Department of Medicine, Veteran Affairs, Nashville, TN
| | - Roy Zent
- Division of Nephrology, Department of Medicine, Vanderbilt University, Nashville, TN
- Department of Medicine, Veteran Affairs, Nashville, TN
| | - David H Wasserman
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN
- Mouse Metabolic Phenotyping Center, Vanderbilt University, Nashville, TN
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30
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Kowalski GM, Hamley S, Selathurai A, Kloehn J, De Souza DP, O'Callaghan S, Nijagal B, Tull DL, McConville MJ, Bruce CR. Reversing diet-induced metabolic dysregulation by diet switching leads to altered hepatic de novo lipogenesis and glycerolipid synthesis. Sci Rep 2016; 6:27541. [PMID: 27273128 PMCID: PMC4895138 DOI: 10.1038/srep27541] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 05/18/2016] [Indexed: 02/02/2023] Open
Abstract
In humans, low-energy diets rapidly reduce hepatic fat and improve/normalise glycemic control. Due to difficulties in obtaining human liver, little is known about changes to the lipid species and pathway fluxes that occur under these conditions. Using a combination of stable isotope, and targeted metabolomic approaches we investigated the acute (7-9 days) hepatic effects of switching high-fat high-sucrose diet (HFD) fed obese mice back to a chow diet. Upon the switch, energy intake was reduced, resulting in reductions of fat mass and hepatic triacyl- and diacylglycerol. However, these parameters were still elevated compared to chow fed mice, thus representing an intermediate phenotype. Nonetheless, glucose intolerance and hyperinsulinemia were completely normalized. The diet reversal resulted in marked reductions in hepatic de novo lipogenesis when compared to the chow and HFD groups. Compared with HFD, glycerolipid synthesis was reduced in the reversal animals, however it remained elevated above that of chow controls, indicating that despite experiencing a net loss in lipid stores, the liver was still actively esterifying available fatty acids at rates higher than that in chow control mice. This effect likely promotes the re-esterification of excess free fatty acids released from the breakdown of adipose depots during the weight loss period.
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Affiliation(s)
- Greg M Kowalski
- Centre for Physical Activity and Nutrition Research, School of Exercise and Nutrition Sciences, Deakin University, Burwood, Australia
| | - Steven Hamley
- Centre for Physical Activity and Nutrition Research, School of Exercise and Nutrition Sciences, Deakin University, Burwood, Australia
| | - Ahrathy Selathurai
- Centre for Physical Activity and Nutrition Research, School of Exercise and Nutrition Sciences, Deakin University, Burwood, Australia
| | - Joachim Kloehn
- Metabolomics Australia, Bio21 Molecular Science and Biotechnology Institute, Parkville, Australia
| | - David P De Souza
- Metabolomics Australia, Bio21 Molecular Science and Biotechnology Institute, Parkville, Australia
| | - Sean O'Callaghan
- Metabolomics Australia, Bio21 Molecular Science and Biotechnology Institute, Parkville, Australia
| | - Brunda Nijagal
- Metabolomics Australia, Bio21 Molecular Science and Biotechnology Institute, Parkville, Australia
| | - Dedreia L Tull
- Metabolomics Australia, Bio21 Molecular Science and Biotechnology Institute, Parkville, Australia
| | - Malcolm J McConville
- Metabolomics Australia, Bio21 Molecular Science and Biotechnology Institute, Parkville, Australia
| | - Clinton R Bruce
- Centre for Physical Activity and Nutrition Research, School of Exercise and Nutrition Sciences, Deakin University, Burwood, Australia
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31
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Kang L, Mokshagundam S, Reuter B, Lark DS, Sneddon CC, Hennayake C, Williams AS, Bracy DP, James FD, Pozzi A, Zent R, Wasserman DH. Integrin-Linked Kinase in Muscle Is Necessary for the Development of Insulin Resistance in Diet-Induced Obese Mice. Diabetes 2016; 65:1590-600. [PMID: 27207548 PMCID: PMC4878430 DOI: 10.2337/db15-1434] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Accepted: 03/23/2016] [Indexed: 12/19/2022]
Abstract
Diet-induced muscle insulin resistance is associated with expansion of extracellular matrix (ECM) components, such as collagens, and the expression of collagen-binding integrin, α2β1. Integrins transduce signals from ECM via their cytoplasmic domains, which bind to intracellular integrin-binding proteins. The integrin-linked kinase (ILK)-PINCH-parvin (IPP) complex interacts with the cytoplasmic domain of β-integrin subunits and is critical for integrin signaling. In this study we defined the role of ILK, a key component of the IPP complex, in diet-induced muscle insulin resistance. Wild-type (ILK(lox/lox)) and muscle-specific ILK-deficient (ILK(lox/lox)HSAcre) mice were fed chow or a high-fat (HF) diet for 16 weeks. Body weight was not different between ILK(lox/lox) and ILK(lox/lox)HSAcre mice. However, HF-fed ILK(lox/lox)HSAcre mice had improved muscle insulin sensitivity relative to HF-fed ILK(lox/lox) mice, as shown by increased rates of glucose infusion, glucose disappearance, and muscle glucose uptake during a hyperinsulinemic-euglycemic clamp. Improved muscle insulin action in the HF-fed ILK(lox/lox)HSAcre mice was associated with increased insulin-stimulated phosphorylation of Akt and increased muscle capillarization. These results suggest that ILK expression in muscle is a critical component of diet-induced insulin resistance, which possibly acts by impairing insulin signaling and insulin perfusion through capillaries.
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Affiliation(s)
- Li Kang
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN Mouse Metabolic Phenotyping Center, Vanderbilt University, Nashville, TN Division of Molecular and Clinical Medicine, School of Medicine, University of Dundee, Dundee, U.K.
| | - Shilpa Mokshagundam
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN
| | - Bradley Reuter
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN
| | - Daniel S Lark
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN
| | - Claire C Sneddon
- Division of Molecular and Clinical Medicine, School of Medicine, University of Dundee, Dundee, U.K
| | - Chandani Hennayake
- Division of Molecular and Clinical Medicine, School of Medicine, University of Dundee, Dundee, U.K
| | - Ashley S Williams
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN
| | - Deanna P Bracy
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN Mouse Metabolic Phenotyping Center, Vanderbilt University, Nashville, TN
| | - Freyja D James
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN Mouse Metabolic Phenotyping Center, Vanderbilt University, Nashville, TN
| | - Ambra Pozzi
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN Division of Nephrology, Department of Medicine, Vanderbilt University, Nashville, TN Department of Medicine, Veterans Affairs Hospital, Nashville, TN
| | - Roy Zent
- Division of Nephrology, Department of Medicine, Vanderbilt University, Nashville, TN Department of Medicine, Veterans Affairs Hospital, Nashville, TN
| | - David H Wasserman
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN Mouse Metabolic Phenotyping Center, Vanderbilt University, Nashville, TN
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32
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Zeltz C, Gullberg D. The integrin-collagen connection--a glue for tissue repair? J Cell Sci 2016; 129:653-64. [PMID: 26857815 DOI: 10.1242/jcs.180992] [Citation(s) in RCA: 116] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The α1β1, α2β1, α10β1 and α11β1 integrins constitute a subset of the integrin family with affinity for GFOGER-like sequences in collagens. Integrins α1β1 and α2β1 were originally identified on a subset of activated T-cells, and have since been found to be expressed on a number of cell types including platelets (α2β1), vascular cells (α1β1, α2β1), epithelial cells (α1β1, α2β1) and fibroblasts (α1β1, α2β1). Integrin α10β1 shows a distribution that is restricted to mesenchymal stem cells and chondrocytes, whereas integrin α11β1 appears restricted to mesenchymal stem cells and subsets of fibroblasts. The bulk of the current literature suggests that collagen-binding integrins only have a limited role in adult connective tissue homeostasis, partly due to a limited availability of cell-binding sites in the mature fibrillar collagen matrices. However, some recent data suggest that, instead, they are more crucial for dynamic connective tissue remodeling events--such as wound healing--where they might act specifically to remodel and restore the tissue architecture. This Commentary discusses the recent development in the field of collagen-binding integrins, their roles in physiological and pathological settings with special emphasis on wound healing, fibrosis and tumor-stroma interactions, and include a discussion of the most recently identified newcomers to this subfamily--integrins α10β1 and α11β1.
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Affiliation(s)
- Cédric Zeltz
- Department of Biomedicine and Centre for Cancer Biomarkers, University of Bergen, Jonas Lies vei 91, Bergen N-5009, Norway
| | - Donald Gullberg
- Department of Biomedicine and Centre for Cancer Biomarkers, University of Bergen, Jonas Lies vei 91, Bergen N-5009, Norway
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Arous C, Halban PA. The skeleton in the closet: actin cytoskeletal remodeling in β-cell function. Am J Physiol Endocrinol Metab 2015; 309:E611-20. [PMID: 26286869 DOI: 10.1152/ajpendo.00268.2015] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 08/11/2015] [Indexed: 01/13/2023]
Abstract
Over the last few decades, biomedical research has considered not only the function of single cells but also the importance of the physical environment within a whole tissue, including cell-cell and cell-extracellular matrix interactions. Cytoskeleton organization and focal adhesions are crucial sensors for cells that enable them to rapidly communicate with the physical extracellular environment in response to extracellular stimuli, ensuring proper function and adaptation. The involvement of the microtubular-microfilamentous cytoskeleton in secretion mechanisms was proposed almost 50 years ago, since when the evolution of ever more sensitive and sophisticated methods in microscopy and in cell and molecular biology have led us to become aware of the importance of cytoskeleton remodeling for cell shape regulation and its crucial link with signaling pathways leading to β-cell function. Emerging evidence suggests that dysfunction of cytoskeletal components or extracellular matrix modification influences a number of disorders through potential actin cytoskeleton disruption that could be involved in the initiation of multiple cellular functions. Perturbation of β-cell actin cytoskeleton remodeling could arise secondarily to islet inflammation and fibrosis, possibly accounting in part for impaired β-cell function in type 2 diabetes. This review focuses on the role of actin remodeling in insulin secretion mechanisms and its close relationship with focal adhesions and myosin II.
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Affiliation(s)
- Caroline Arous
- Department of Genetic Medicine and Development, University of Geneva Medical Center, Geneva, Switzerland
| | - Philippe A Halban
- Department of Genetic Medicine and Development, University of Geneva Medical Center, Geneva, Switzerland
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34
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Williams AS, Kang L, Wasserman DH. The extracellular matrix and insulin resistance. Trends Endocrinol Metab 2015; 26:357-66. [PMID: 26059707 PMCID: PMC4490038 DOI: 10.1016/j.tem.2015.05.006] [Citation(s) in RCA: 141] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2015] [Revised: 05/13/2015] [Accepted: 05/14/2015] [Indexed: 12/14/2022]
Abstract
The extracellular matrix (ECM) is a highly-dynamic compartment that undergoes remodeling as a result of injury and repair. Over the past decade, mounting evidence in humans and rodents suggests that ECM remodeling is associated with diet-induced insulin resistance in several metabolic tissues. In addition, integrin receptors for the ECM have also been implicated in the regulation of insulin action. This review addresses what is currently known about the ECM, integrins, and insulin action in the muscle, liver, and adipose tissue. Understanding how ECM remodeling and integrin signaling regulate insulin action may aid in the development of new therapeutic targets for the treatment of insulin resistance and type 2 diabetes (T2D).
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Affiliation(s)
- Ashley S Williams
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA
| | - Li Kang
- Division of Cardiovascular and Diabetes Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, UK
| | - David H Wasserman
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA; Mouse Metabolic Phenotyping Center, Vanderbilt University, Nashville, TN, USA.
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