1
|
Flores-Opazo M, Kopinke D, Helmbacher F, Fernández-Verdejo R, Tuñón-Suárez M, Lynch GS, Contreras O. Fibro-adipogenic progenitors in physiological adipogenesis and intermuscular adipose tissue remodeling. Mol Aspects Med 2024; 97:101277. [PMID: 38788527 DOI: 10.1016/j.mam.2024.101277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 04/27/2024] [Accepted: 05/13/2024] [Indexed: 05/26/2024]
Abstract
Excessive accumulation of intermuscular adipose tissue (IMAT) is a common pathological feature in various metabolic and health conditions and can cause muscle atrophy, reduced function, inflammation, insulin resistance, cardiovascular issues, and unhealthy aging. Although IMAT results from fat accumulation in muscle, the mechanisms underlying its onset, development, cellular components, and functions remain unclear. IMAT levels are influenced by several factors, such as changes in the tissue environment, muscle type and origin, extent and duration of trauma, and persistent activation of fibro-adipogenic progenitors (FAPs). FAPs are a diverse and transcriptionally heterogeneous population of stromal cells essential for tissue maintenance, neuromuscular stability, and tissue regeneration. However, in cases of chronic inflammation and pathological conditions, FAPs expand and differentiate into adipocytes, resulting in the development of abnormal and ectopic IMAT. This review discusses the role of FAPs in adipogenesis and how they remodel IMAT. It highlights evidence supporting FAPs and FAP-derived adipocytes as constituents of IMAT, emphasizing their significance in adipose tissue maintenance and development, as well as their involvement in metabolic disorders, chronic pathologies and diseases. We also investigated the intricate molecular pathways and cell interactions governing FAP behavior, adipogenesis, and IMAT accumulation in chronic diseases and muscle deconditioning. Finally, we hypothesize that impaired cellular metabolic flexibility in dysfunctional muscles impacts FAPs, leading to IMAT. A deeper understanding of the biology of IMAT accumulation and the mechanisms regulating FAP behavior and fate are essential for the development of new therapeutic strategies for several debilitating conditions.
Collapse
Affiliation(s)
| | - Daniel Kopinke
- Department of Pharmacology and Therapeutics, University of Florida, Gainesville, 32610, FL, USA; Myology Institute, University of Florida College of Medicine, Gainesville, FL, USA.
| | | | - Rodrigo Fernández-Verdejo
- Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA, USA; Laboratorio de Fisiología Del Ejercicio y Metabolismo (LABFEM), Escuela de Kinesiología, Facultad de Medicina, Universidad Finis Terrae, Chile.
| | - Mauro Tuñón-Suárez
- Laboratorio de Fisiología Del Ejercicio y Metabolismo (LABFEM), Escuela de Kinesiología, Facultad de Medicina, Universidad Finis Terrae, Chile.
| | - Gordon S Lynch
- Centre for Muscle Research, Department of Anatomy and Physiology, The University of Melbourne, Melbourne, Victoria, Parkville 3010, Australia.
| | - Osvaldo Contreras
- Developmental and Regenerative Biology Division, Victor Chang Cardiac Research Institute, Darlinghurst, NSW, 2010, Australia; School of Clinical Medicine, UNSW Sydney, Kensington, NSW 2052, Australia.
| |
Collapse
|
2
|
Parson JC, Zhang X, Craft CS, Magee KL, Scheller EL, Meyer GA. Development and expansion of intramuscular adipose tissue is not dependent on UCP-1-lineage cells in mice. J Orthop Res 2023; 41:2599-2609. [PMID: 37203780 PMCID: PMC10657332 DOI: 10.1002/jor.25627] [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: 12/02/2022] [Revised: 04/13/2023] [Accepted: 05/16/2023] [Indexed: 05/20/2023]
Abstract
Accumulation of adipose tissue within and outside of skeletal muscle is associated with orthopedic injury and metabolic disease, where it is thought to impede muscle function. The close juxtaposition between this adipose and myofibers has led to hypotheses that paracrine interactions between the two regulate local physiology. Recent work suggests that intramuscular adipose tissue (IMAT) may have features of beige or brown fat, indicated by the expression of uncoupling protein-1 (UCP-1). However, this is contested by other studies. Clarification of this point is needed to inform our understanding of the relationship between IMAT and muscle health. To achieve this, we examined the effects of constitutive UCP-1+ cell ablation (UCP1-DTA) on IMAT development and homeostasis. IMAT developed normally in UCP1-DTA mice, with no significant differences in quantity compared with wild-type littermates. Likewise, IMAT accumulation in response to glycerol-induced injury was similar between genotypes, with no significant differences in adipocyte size, quantity, or dispersion. This suggests that neither physiological nor pathological IMAT express UCP-1 and that the development of IMAT does not depend on UCP-1 lineage cells. In response to β3-adrenergic stimulation, we find minor, localized UCP-1 positivity in wildtype IMAT, but the bulk of the adipocytes are unresponsive. In contrast, two depots of muscle-adjacent (epi-muscular) adipose tissue have reduced mass in UCP1-DTA mice and UCP-1 positivity in wildtype littermates, comparable to traditional beige and brown adipose depots. Taken together this evidence strongly supports a white adipose phenotype for mouse IMAT and a brown/beige phenotype for some adipose outside the muscle boundary.
Collapse
Affiliation(s)
| | - Xiao Zhang
- Division of Bone and Mineral Diseases, Department of Medicine, Washington University, St. Louis, Missouri, USA
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri, USA
| | - Clarissa S Craft
- Division of Bone and Mineral Diseases, Department of Medicine, Washington University, St. Louis, Missouri, USA
- Department of Cellular Biology and Physiology, Washington University, St. Louis, 63108, Missouri, USA
| | - Kristann L Magee
- Division of Bone and Mineral Diseases, Department of Medicine, Washington University, St. Louis, Missouri, USA
| | - Erica L Scheller
- Division of Bone and Mineral Diseases, Department of Medicine, Washington University, St. Louis, Missouri, USA
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri, USA
- Department of Cellular Biology and Physiology, Washington University, St. Louis, 63108, Missouri, USA
| | - Gretchen A Meyer
- Program in Physical Therapy, St. Louis, Missouri, USA
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri, USA
- Department of Orthopaedic Surgery, Washington University, St. Louis, Missouri, USA
- Department of Neurology, Washington University, St. Louis, Missouri, USA
| |
Collapse
|
3
|
Zhang T, Li J, Li X, Liu Y. Intermuscular adipose tissue in obesity and related disorders: cellular origins, biological characteristics and regulatory mechanisms. Front Endocrinol (Lausanne) 2023; 14:1280853. [PMID: 37920255 PMCID: PMC10619759 DOI: 10.3389/fendo.2023.1280853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 10/01/2023] [Indexed: 11/04/2023] Open
Abstract
Intermuscular adipose tissue (IMAT) is a unique adipose depot interspersed between muscle fibers (myofibers) or muscle groups. Numerous studies have shown that IMAT is strongly associated with insulin resistance and muscular dysfunction in people with metabolic disease, such as obesity and type 2 diabetes. Moreover, IMAT aggravates obesity-related muscle metabolism disorders via secretory factors. Interestingly, researchers have discovered that intermuscular brown adipocytes in rodent models provide new hope for obesity treatment by acting on energy dissipation, which inspired researchers to explore the underlying regulation of IMAT formation. However, the molecular and cellular properties and regulatory processes of IMAT remain debated. Previous studies have suggested that muscle-derived stem/progenitor cells and other adipose tissue progenitors contribute to the development of IMAT. Adipocytes within IMAT exhibit features that are similar to either white adipocytes or uncoupling protein 1 (UCP1)-positive brown adipocytes. Additionally, given the heterogeneity of skeletal muscle, which comprises myofibers, satellite cells, and resident mesenchymal progenitors, it is plausible that interplay between these cellular components actively participate in the regulation of intermuscular adipogenesis. In this context, we review recent studies associated with IMAT to offer insights into the cellular origins, biological properties, and regulatory mechanisms of IMAT. Our aim is to provide novel ideas for the therapeutic strategy of IMAT and the development of new drugs targeting IMAT-related metabolic diseases.
Collapse
Affiliation(s)
- Ting Zhang
- Center of Obesity and Metabolic Diseases, Department of General Surgery, The Third People’s Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, China
- Center of Gastrointestinal and Minimally Invasive Surgery, Department of General Surgery, The Third People’s Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, China
- Medical Research Center, The Third People’s Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, China
| | - Jun Li
- Department of Orthopedics, The Third People’s Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, China
| | - Xi Li
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China
| | - Yanjun Liu
- Center of Obesity and Metabolic Diseases, Department of General Surgery, The Third People’s Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, China
- Center of Gastrointestinal and Minimally Invasive Surgery, Department of General Surgery, The Third People’s Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, China
| |
Collapse
|
4
|
Yan W, Kan X, Wang Y, Zhang Y. Expression of key genes involved in lipid deposition in intramuscular adipocytes of sheep under high glucose conditions. J Anim Physiol Anim Nutr (Berl) 2023; 107:444-452. [PMID: 35754149 DOI: 10.1111/jpn.13750] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 06/03/2022] [Accepted: 06/08/2022] [Indexed: 11/27/2022]
Abstract
The intramuscular fat (IMF) content in sheep is associated with IMF deposition, which is affected by intramuscular adipocyte hypertrophy. In this study, we established an in vitro high glucose model of intramuscular adipocytes of sheep to investigate the expression of cannabinoid receptor 1 (CB1) gene, fatty acid-binding protein 4 (FABP4) gene, lipid metabolism-associated genes (acetyl-CoA carboxylase [ACC], fatty acid synthase [FAS], and stearoyl-CoA desaturase 1 [SCD1]), and transcription factors (liver X receptor [LXRα]), sterol regulatory element-binding transcription factor 1 [SREBF-1], and carbohydrate-responsive element-binding protein [ChREBP]) as well as the changes in the lipid and triglyceride (TG) levels in intramuscular adipocytes. The results showed that the differentiated mature adipocytes had a spherical shape, and the number and volume of the lipid droplets gradually increased over time under high glucose conditions. The lipid and TG levels in intramuscular adipocytes of sheep continuously increased under high glucose conditions. Furthermore, CB1, FABP4, ACC, FAS, SCD1, LXRα, SREBF-1, and ChREBP were highly expressed under high glucose conditions, suggesting that the energetic nutrients also affect the expression of the CB1 gene, which works in coordination with lipid metabolism-associated genes and are beneficial for lipid deposition in the intramuscular adipocytes of sheep.
Collapse
Affiliation(s)
- Wei Yan
- School of Animal Science and Technology, Jiangsu Agri-animal Husbandry Vocational College, Taizhou, China
| | - Xiangdong Kan
- Institute of Animal Husbandry and Veterinary Medicine, Tibet Academy of Agriculture and Animal Husbandry Science, Lhasa, China
| | - Yutao Wang
- College of Life and Geographic Sciences, Kashi University, Kashi, China.,Key Laboratory of Biological Resources and Ecology of Pamirs Plateau in Xinjiang, Uygur Autonomous Region, Kashi, China
| | - Yonghao Zhang
- College of Life and Geographic Sciences, Kashi University, Kashi, China.,Key Laboratory of Biological Resources and Ecology of Pamirs Plateau in Xinjiang, Uygur Autonomous Region, Kashi, China
| |
Collapse
|
5
|
Sastourné-Arrey Q, Mathieu M, Contreras X, Monferran S, Bourlier V, Gil-Ortega M, Murphy E, Laurens C, Varin A, Guissard C, Barreau C, André M, Juin N, Marquès M, Chaput B, Moro C, O'Gorman D, Casteilla L, Girousse A, Sengenès C. Adipose tissue is a source of regenerative cells that augment the repair of skeletal muscle after injury. Nat Commun 2023; 14:80. [PMID: 36604419 PMCID: PMC9816314 DOI: 10.1038/s41467-022-35524-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 12/08/2022] [Indexed: 01/07/2023] Open
Abstract
Fibro-adipogenic progenitors (FAPs) play a crucial role in skeletal muscle regeneration, as they generate a favorable niche that allows satellite cells to perform efficient muscle regeneration. After muscle injury, FAP content increases rapidly within the injured muscle, the origin of which has been attributed to their proliferation within the muscle itself. However, recent single-cell RNAseq approaches have revealed phenotype and functional heterogeneity in FAPs, raising the question of how this differentiation of regenerative subtypes occurs. Here we report that FAP-like cells residing in subcutaneous adipose tissue (ScAT), the adipose stromal cells (ASCs), are rapidly released from ScAT in response to muscle injury. Additionally, we find that released ASCs infiltrate the damaged muscle, via a platelet-dependent mechanism and thus contribute to the FAP heterogeneity. Moreover, we show that either blocking ASCs infiltration or removing ASCs tissue source impair muscle regeneration. Collectively, our data reveal that ScAT is an unsuspected physiological reservoir of regenerative cells that support skeletal muscle regeneration, underlining a beneficial relationship between muscle and fat.
Collapse
Affiliation(s)
- Quentin Sastourné-Arrey
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Maxime Mathieu
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Xavier Contreras
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Sylvie Monferran
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Virginie Bourlier
- Institute of Metabolic and Cardiovascular Diseases, INSERM /Paul Sabatier University UMR 1297, Team MetaDiab, Toulouse, France
| | - Marta Gil-Ortega
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Enda Murphy
- School of Health and Human Performance, Dublin City University, Dublin, Ireland
| | - Claire Laurens
- Institute of Metabolic and Cardiovascular Diseases, INSERM /Paul Sabatier University UMR 1297, Team MetaDiab, Toulouse, France
| | - Audrey Varin
- RESTORE, Research Center, Team 2 FLAMES, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Christophe Guissard
- RESTORE, Research Center, Team 4 GOT-IT, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Corinne Barreau
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Mireille André
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Noémie Juin
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Marie Marquès
- Institute of Metabolic and Cardiovascular Diseases, INSERM /Paul Sabatier University UMR 1297, Team MetaDiab, Toulouse, France
| | - Benoit Chaput
- Department of Plastic and Reconstructive Surgery, Toulouse University Hospital, 31100, Toulouse, France
| | - Cédric Moro
- Institute of Metabolic and Cardiovascular Diseases, INSERM /Paul Sabatier University UMR 1297, Team MetaDiab, Toulouse, France
| | - Donal O'Gorman
- School of Health and Human Performance, Dublin City University, Dublin, Ireland
| | - Louis Casteilla
- RESTORE, Research Center, Team 4 GOT-IT, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Amandine Girousse
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | - Coralie Sengenès
- RESTORE, Research Center, Team 1 STROMAGICS, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France.
| |
Collapse
|
6
|
Goodpaster BH, Bergman BC, Brennan AM, Sparks LM. Intermuscular adipose tissue in metabolic disease. Nat Rev Endocrinol 2022; 19:285-298. [PMID: 36564490 DOI: 10.1038/s41574-022-00784-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/21/2022] [Indexed: 12/24/2022]
Abstract
Intermuscular adipose tissue (IMAT) is a distinct adipose depot described in early reports as a 'fatty replacement' or 'muscle fat infiltration' that was linked to ageing and neuromuscular disease. Later studies quantifying IMAT with modern in vivo imaging methods (computed tomography and magnetic resonance imaging) revealed that IMAT is proportionately higher in men and women with type 2 diabetes mellitus and the metabolic syndrome than in people without these conditions and is associated with insulin resistance and poor physical function with ageing. In parallel, agricultural research has provided extensive insight into the role of IMAT and other muscle lipids in muscle (that is, meat) quality. In addition, studies using rodent models have shown that IMAT is a bona fide white adipose tissue depot capable of robust triglyceride storage and turnover. Insight into the importance of IMAT in human biology has been limited by the dearth of studies on its biological properties, that is, the quality of IMAT. However, in the past few years, investigations have begun to determine that IMAT has molecular and metabolic features that distinguish it from other adipose tissue depots. These studies will be critical to further decipher the role of IMAT in health and disease and to better understand its potential as a therapeutic target.
Collapse
Affiliation(s)
| | - Bryan C Bergman
- Division of Endocrinology, Diabetes, and Metabolism, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Andrea M Brennan
- Translational Research Institute, AdventHealth, Orlando, FL, USA
| | - Lauren M Sparks
- Translational Research Institute, AdventHealth, Orlando, FL, USA
| |
Collapse
|
7
|
Zhang QH, Xie LH, Zhang HN, Liu JH, Zhao Y, Chen LH, Ju Y, Chen AL, Wang N, Song QW, Xie LZ, Liu AL. Magnetic Resonance Imaging Assessment of Abdominal Ectopic Fat Deposition in Correlation With Cardiometabolic Risk Factors. Front Endocrinol (Lausanne) 2022; 13:820023. [PMID: 35432188 PMCID: PMC9005896 DOI: 10.3389/fendo.2022.820023] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 03/01/2022] [Indexed: 11/13/2022] Open
Abstract
PURPOSE Ectopic fat accumulation and abdominal fat distribution may have different cardiometabolic risk profiles. This study aimed to assess the associations between various magnetic resonance imaging (MRI)-acquired fat depots and cardiometabolic risk factors. METHODS A total of 320 subjects with median age of 59 years, 148 men and 172 women, were enrolled in the study. Visceral adipose tissue (VAT) area and fat fraction (FF), subcutaneous adipose tissue (SAT) area and FF at the L1-L2 levels, preperitoneal adipose tissue (pPAT) area and FF, hepatic FF, pancreatic FF, and intramuscular FF were assessed by MRI FF maps. The associations of various MRI-acquired fat depots with blood pressure, glucose, and lipid were examined using sex-stratified linear regression. Logistic regression stratified by sex was used to analyze the association of various MRI-acquired fat depots with the risk of hypertension, T2DM, and dyslipidemia. RESULTS The intraclass correlation coefficient (ICC) values were >0.9, which suggested good interobserver and intraobserver agreement. VAT area, V/S, hepatic fat, pancreatic fat, and pPAT rather than SAT area were significantly associated with multiple cardiometabolic risk factors (all p < 0.05). However, the patterns of these correlations varied by sex and specific risk factors. Also, VAT and SAT FF were only significantly associated with multiple cardiometabolic risk factors in women (all p < 0.05). CONCLUSIONS VAT, hepatic fat, pancreatic fat, and pPAT were associated with cardiovascular metabolic risk factors independent of BMI. The patterns of these correlations were related to gender. These findings further the understanding of the association between ectopic fat deposition and cardiometabolic risk factors and help to better understand the obesity heterogeneity.
Collapse
Affiliation(s)
- Qin-He Zhang
- Department of Radiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Lu-Han Xie
- Department of Pathology and Forensics, Dalian Medical University, Dalian, China
| | - Hao-Nan Zhang
- Department of Radiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Jing-Hong Liu
- Department of Radiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Ying Zhao
- Department of Radiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Li-Hua Chen
- Department of Radiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Ye Ju
- Department of Radiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - An-Liang Chen
- Department of Radiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Nan Wang
- Department of Radiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Qing-Wei Song
- Department of Radiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Li-Zhi Xie
- MR Research, GE Healthcare, Beijing, China
| | - Ai-Lian Liu
- Department of Radiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
- *Correspondence: Ai-Lian Liu,
| |
Collapse
|
8
|
Vion J, Sramkova V, Montastier E, Marquès MA, Caspar-Bauguil S, Duparc T, Martinez LO, Bourlier V, Harant I, Larrouy D, Moussaoui N, Bonnel S, Vindis C, Dray C, Valet P, Saulnier-Blache JS, Schanstra JP, Thalamas C, Viguerie N, Moro C, Langin D. Metabolic and cardiovascular adaptations to an 8-wk lifestyle weight loss intervention in younger and older obese men. Am J Physiol Endocrinol Metab 2021; 321:E325-E337. [PMID: 34250814 DOI: 10.1152/ajpendo.00109.2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The number of older obese adults is increasing worldwide. Whether obese adults show similar health benefits in response to lifestyle interventions at different ages is unknown. The study enrolled 25 obese men (body mass index: 31-39 kg/m2) in two arms according to age (30-40 and 60-70 yr old). Participants underwent an 8-wk intervention with moderate calorie restriction (∼20% below individual energy requirements) and supervised endurance training resulting in ∼5% weight loss. Body composition was measured using dual energy X-ray absorptiometry. Insulin sensitivity was assessed during a hypersinsulinemic-euglycemic clamp. Cardiometabolic profile was derived from blood parameters. Subcutaneous fat and vastus lateralis muscle biopsies were used for ex vivo analyses. Two-way repeated-measure ANOVA and linear mixed models were used to evaluate the response to lifestyle intervention and comparison between the two groups. Fat mass was decreased and bone mass was preserved in the two groups after intervention. Muscle mass decreased significantly in older obese men. Cardiovascular risk (Framingham risk score, plasma triglyceride, and cholesterol) and insulin sensitivity were greatly improved to a similar extent in the two age groups after intervention. Changes in adipose tissue and skeletal muscle transcriptomes were marginal. Analysis of the differential response to the lifestyle intervention showed tenuous differences between age groups. These data suggest that lifestyle intervention combining calorie restriction and exercise shows similar beneficial effects on cardiometabolic risk and insulin sensitivity in younger and older obese men. However, attention must be paid to potential loss of muscle mass in response to weight loss in older obese men.NEW & NOTEWORTHY Rise in obesity and aging worldwide are major trends of critical importance in public health. This study addresses a current challenge in obesity management. Do older obese adults respond differently to a lifestyle intervention composed of moderate calorie restriction and supervised physical activity than younger ones? The main conclusion of the study is that older and younger obese men similarly benefit from the intervention in terms of cardiometabolic risk.
Collapse
Affiliation(s)
- Julie Vion
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
| | - Veronika Sramkova
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
- Department of Pathophysiology, Third Faculty of Medicine, Charles University, Prague, Czech Republic
- Franco-Czech Laboratory for Clinical Research on Obesity, Third Faculty of Medicine, Prague, Czech Republic, Paul Sabatier University, Toulouse, France
| | - Emilie Montastier
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
- Franco-Czech Laboratory for Clinical Research on Obesity, Third Faculty of Medicine, Prague, Czech Republic, Paul Sabatier University, Toulouse, France
- Departments of Nutrition and Clinical Biochemistry, Toulouse University Hospitals, Toulouse, France
| | - Marie-Adeline Marquès
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
- Franco-Czech Laboratory for Clinical Research on Obesity, Third Faculty of Medicine, Prague, Czech Republic, Paul Sabatier University, Toulouse, France
| | - Sylvie Caspar-Bauguil
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
- Franco-Czech Laboratory for Clinical Research on Obesity, Third Faculty of Medicine, Prague, Czech Republic, Paul Sabatier University, Toulouse, France
- Departments of Nutrition and Clinical Biochemistry, Toulouse University Hospitals, Toulouse, France
| | - Thibaut Duparc
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
| | - Laurent O Martinez
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
| | - Virginie Bourlier
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
| | - Isabelle Harant
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
| | - Dominique Larrouy
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
| | - Nabila Moussaoui
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
| | - Sophie Bonnel
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
| | - Cécile Vindis
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
- Clinical Investigation Center, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, Toulouse University Hospitals, CIC1436, F-CRIN/FORCE Network, Toulouse, France
| | - Cédric Dray
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
| | - Philippe Valet
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
| | - Jean-Sébastien Saulnier-Blache
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
| | - Joost P Schanstra
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
| | - Claire Thalamas
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
- Clinical Investigation Center, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, Toulouse University Hospitals, CIC1436, F-CRIN/FORCE Network, Toulouse, France
| | - Nathalie Viguerie
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
- Departments of Nutrition and Clinical Biochemistry, Toulouse University Hospitals, Toulouse, France
| | - Cedric Moro
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
- Franco-Czech Laboratory for Clinical Research on Obesity, Third Faculty of Medicine, Prague, Czech Republic, Paul Sabatier University, Toulouse, France
| | - Dominique Langin
- Institute of Metabolic and Cardiovascular Diseases, I2MC Team MetaDiab, Université de Toulouse, INSERM, Université Toulouse III-Paul Sabatier, UMR 1297, F-CRIN/FORCE Network, Toulouse, France
- Franco-Czech Laboratory for Clinical Research on Obesity, Third Faculty of Medicine, Prague, Czech Republic, Paul Sabatier University, Toulouse, France
- Departments of Nutrition and Clinical Biochemistry, Toulouse University Hospitals, Toulouse, France
- Institut Universitaire de France, IUF, Paris, France
| |
Collapse
|
9
|
Xu Z, You W, Chen W, Zhou Y, Nong Q, Valencak TG, Wang Y, Shan T. Single-cell RNA sequencing and lipidomics reveal cell and lipid dynamics of fat infiltration in skeletal muscle. J Cachexia Sarcopenia Muscle 2021; 12:109-129. [PMID: 33244879 PMCID: PMC7890272 DOI: 10.1002/jcsm.12643] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 09/23/2020] [Accepted: 10/12/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Ageing is accompanied by sarcopenia and intramuscular fat (IMAT) infiltration. In skeletal muscle, fat infiltration is a common feature in several myopathies and is associated with muscular dysfunction and insulin resistance. However, the cellular origin and lipidomic and transcriptomic changes during fat infiltration in skeletal muscle remain unclear. METHODS In the current study, we generated a high IMAT-infiltrated skeletal muscle model by glycerol (GLY) injection. Single-cell RNA sequencing and lineage tracing were performed on GLY-injured skeletal muscle at 5 days post-injection (DPI) to identify the cell origins and dynamics. Lipidomics and RNA sequencing were performed on IMAT-infiltrated skeletal muscle at 14 DPI (or 17 DPI for the cold treatment) to analyse alterations of lipid compositions and gene expression levels. RESULTS We identified nine distinct major clusters including myeloid-derived cells (52.13%), fibroblast/fibro/adipogenic progenitors (FAPs) (23.24%), and skeletal muscle stem cells (2.02%) in GLY-injured skeletal muscle. Clustering and pseudotemporal trajectories revealed six subpopulations in fibroblast/FAPs and 10 subclusters in myeloid-derived cells. A subpopulation of myeloid-derived cells expressing adipocyte-enriched genes and Pdgfra- /Cd68+ cells displayed lipid droplets upon adipogenic induction, indicating their adipogenic potential. Lipidomic analysis revealed the changes of overall lipid classes composition (e.g. triglycerides (TAGs) increased by 19.3 times, P = 0.0098; sulfoquinovosyl diacylglycerol decreased by 83%, P = 0.0056) and in the distribution of lipids [e.g. TAGs (18:2/18:2/22:6) increased by 181.6 times, P = 0.021] between GLY-group and saline control. RNA-seq revealed 1847 up-regulated genes and 321 down-regulated genes and significant changes in lipid metabolism-related pathways (e.g. glycerolipid pathway and glycerophospholipid pathway) in our model of GLY-injured skeletal muscle. Notably, short-term cold exposure altered fatty acid composition (e.g. saturated fatty acid decreased by 6.4%, P = 0.058) in fat-infiltrated muscles through directly affecting lipid metabolism pathways including PI3K-AKT and MAPK signalling pathway. CONCLUSIONS Our results showed that a subpopulation of myeloid-derived cells may contribute to IMAT infiltration. GLY-induced IMAT infiltration changed the lipid composition and gene expression profiles. Short-term cold exposure might regulate lipid metabolism and its related signalling pathways in fat-infiltrated muscle. Our study provides a comprehensive resource describing the molecular signature of fat infiltration in skeletal muscle.
Collapse
Affiliation(s)
- Ziye Xu
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| | - Wenjing You
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| | - Wentao Chen
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| | - Yanbing Zhou
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| | - Qiuyun Nong
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| | - Teresa G Valencak
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yizhen Wang
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| | - Tizhong Shan
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| |
Collapse
|
10
|
Armandi A, Rosso C, Caviglia GP, Ribaldone DG, Bugianesi E. The Impact of Dysmetabolic Sarcopenia Among Insulin Sensitive Tissues: A Narrative Review. Front Endocrinol (Lausanne) 2021; 12:716533. [PMID: 34858322 PMCID: PMC8631324 DOI: 10.3389/fendo.2021.716533] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 10/12/2021] [Indexed: 12/25/2022] Open
Abstract
Sarcopenia is a common muscular affection among elderly individuals. More recently, it has been recognized as the skeletal muscle (SM) expression of the metabolic syndrome. The prevalence of sarcopenia is increasing along with visceral obesity, to which it is tightly associated. Nonetheless, it is a still underreported entity by clinicians, despite the worsening in disease burden and reduced patient quality of life. Recognition of sarcopenia is clinically challenging, and variability in study populations and diagnostic methods across the clinical studies makes it hard to reach a strong evidence. Impaired insulin activity in SM is responsible for the altered molecular pathways and clinical manifestations of sarcopenia, which is morphologically expressed by myosteatosis. Lipotoxicity, oxidative stress and adipose tissue-derived inflammation lead to both alterations in glucose disposal and protein synthesis in SM, with raising insulin resistance (IR) and SM atrophy. In particular, hyperleptinemia and leptin resistance interfere directly with SM activity, but also with the release of Growth Hormone from the hypohysis, leading to a lack in its anabolic effect on SM. Moreover, sarcopenia is independently associated to liver fibrosis in Non-Alcoholic Fatty Liver Disease (NAFLD), which in turn worsens SM functionality through the secretion of proinflammatory heptokines. The cross-talk between the liver and SM in the IR setting is of crucial relevance, given the high prevalence of NAFLD and the reciprocal impact of insulin-sensitive tissues on the overall disease burden. Along with the efforts of non-invasive diagnostic approaches, irisin and myostatin are two myokines currently evaluated as potential biomarkers for diagnosis and prognostication. Decreased irisin levels seem to be potentially associated to sarcopenia, whereas increased myostatin has shown to negatively impact on sarcopenia in pre-clinical studies. Gene variants in irisin have been explored with regard to the impact on the liver disease phenotype, with conflicting results. The gut-muscle axis has gain relevance with the evidence that insulin resistance-derived gut dysbiosis is responsible for increased endotoxemia and reduction in short-chain free fatty acids, directly affecting and predisposing to sarcopenia. Based on the current evidence, more efforts are needed to increase awareness and improve the management of sarcopenic patients.
Collapse
|
11
|
Deng B, Zhang F, Wen J, Shen W, Gao Q, Peng X, Tan J, Pu Z, Ye S, Wang L, Liu W, Jiang S. The transcriptomes from two adipocyte progenitor cell types provide insight into the differential functions of MSTN. Genomics 2020; 112:3826-3836. [DOI: 10.1016/j.ygeno.2020.01.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 01/30/2020] [Accepted: 01/31/2020] [Indexed: 12/17/2022]
|
12
|
Carper D, Coué M, Laurens C, Langin D, Moro C. Reappraisal of the optimal fasting time for insulin tolerance tests in mice. Mol Metab 2020; 42:101058. [PMID: 32739449 PMCID: PMC7471620 DOI: 10.1016/j.molmet.2020.101058] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 07/23/2020] [Accepted: 07/28/2020] [Indexed: 12/26/2022] Open
Abstract
Objective Most studies routinely use overnight or 6 h of fasting before testing metabolic glucose homeostasis in mice. Other studies used empirically shorter fasting times (<6 h). We attempted to determine the shortest fasting time required for optimal insulin responsiveness while minimizing metabolic stress. Methods A course of fasting for up to 24 h (0, 2, 4, 6, 12, and 24 h) was conducted in C57Bl/6J male mice. Body weight, metabolic parameters, and insulin tolerance were measured in each experimental group. The organs were collected at the same time on separate occasions and glycogen and metabolic gene expression were measured in the liver and skeletal muscle. Results Our data show that blood glucose levels do not significantly change during a 6 h fast, while plasma insulin levels decrease to similar levels between 2 h and 6 h of fasting. During overnight (12 h) and 24 h fasts, a robust decrease in blood glucose and plasma insulin was observed along with a profound depletion in liver glycogen content. Insulin tolerance was comparable between baseline and 6 h fasts while 4 h and 6 h fasts were associated with a greater depletion of liver glycogen than 2 h fasts, impacting the glucose counter-regulatory response. Fasting induced progressive weight loss that was attenuated at thermoneutrality. Fasting longer than 4 h induced major body weight loss (>5%) and significant changes in catabolic gene expression in the liver and skeletal muscle. Conclusion Collectively, these data suggest that 2 h of fasting appears optimal for the assessment of insulin tolerance in mice as this duration minimizes major metabolic stress and weight loss. Fasting in mice induces time-dependent metabolic stress and weight loss. Fasting promotes profound changes in catabolic gene expression in liver and muscles. Fasting-induced weight loss is attenuated at thermoneutrality. Two hours fasting appears to be optimal prior to assessing insulin tolerance in mice.
Collapse
Affiliation(s)
- Deborah Carper
- Inserm, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France; University of Toulouse, Paul Sabatier University, France
| | - Marine Coué
- Inserm, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France; University of Toulouse, Paul Sabatier University, France
| | - Claire Laurens
- Inserm, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France; University of Toulouse, Paul Sabatier University, France
| | - Dominique Langin
- Inserm, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France; University of Toulouse, Paul Sabatier University, France; Toulouse University Hospitals, Department of Clinical Biochemistry, Toulouse, France
| | - Cedric Moro
- Inserm, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France; University of Toulouse, Paul Sabatier University, France.
| |
Collapse
|
13
|
Poggiogalle E, Mendes I, Ong B, Prado CM, Mocciaro G, Mazidi M, Lubrano C, Lenzi A, Donini LM, Siervo M. Sarcopenic obesity and insulin resistance: Application of novel body composition models. Nutrition 2020; 75-76:110765. [DOI: 10.1016/j.nut.2020.110765] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 11/08/2019] [Accepted: 01/28/2020] [Indexed: 01/06/2023]
|
14
|
Bryniarski AR, Meyer GA. Brown Fat Promotes Muscle Growth During Regeneration. J Orthop Res 2019; 37:1817-1826. [PMID: 31042310 PMCID: PMC6824921 DOI: 10.1002/jor.24324] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 04/08/2019] [Indexed: 02/04/2023]
Abstract
Accumulation of adipose tissue around and within muscles is highly correlated with reduced strength, functional limitations, and poor rehabilitative outcomes. Given the intimate physical contact between these tissues, paracrine cross-talk is a likely mediator of this association. The recent discovery that muscle-associated adipose tissue exhibits features of beige fat has suggested that this cross-talk may be modifiable, as beige fat can be stimulated to assume features of brown fat. In this work, we describe a novel intermuscular fat transplant model in the mouse rotator cuff to investigate cross-talk between muscle and adipose tissue. Specifically, we examine the role of transplanted fat phenotype on muscle regeneration by transplanting pieces of classical brown (interscapular), beige (inguinal), or white (epididymal) adipose tissue in conjunction with cardiotoxin injection to the adjacent supraspinatus muscle. Transplantation of brown fat, but not beige or white, significantly increased muscle mass, fiber cross-sectional area and contractile force production compared with sham injury. This effect was not seen when cardiotoxin was delivered to a distant muscle, or when adjacent muscles were injected with saline indicating that the effect is localized and specifically targeting the regenerative process. Thus, we conclude that local signaling between fat and muscle varies by phenotype and that brown fat supports regeneration. Clinical significance: Our findings suggest that the phenotype of muscle-associated fat could be a novel therapeutic target to modulate fat-muscle signaling. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 37:1817-1826, 2019.
Collapse
Affiliation(s)
- Anna R. Bryniarski
- Departments of Investigation performed at the Program in Physical Therapy, Washington University in St. Louis; St. Louis, MO 63108
| | - Gretchen A. Meyer
- Departments of Investigation performed at the Program in Physical Therapy, Washington University in St. Louis; St. Louis, MO 63108,Departments of Neurology, Orthopaedic Surgery and Biomedical Engineering, Washington University in St. Louis; St. Louis, MO 63108,Corresponding Author: Dr. Gretchen A.Meyer, 4444 Forest Park Ave, Suite 1101, St. Louis, MO 63108, Tel: 314-286-1456, Fax: 314-747-0674,
| |
Collapse
|
15
|
Sachs S, Zarini S, Kahn DE, Harrison KA, Perreault L, Phang T, Newsom SA, Strauss A, Kerege A, Schoen JA, Bessesen DH, Schwarzmayr T, Graf E, Lutter D, Krumsiek J, Hofmann SM, Bergman BC. Intermuscular adipose tissue directly modulates skeletal muscle insulin sensitivity in humans. Am J Physiol Endocrinol Metab 2019; 316:E866-E879. [PMID: 30620635 PMCID: PMC6580171 DOI: 10.1152/ajpendo.00243.2018] [Citation(s) in RCA: 93] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Intermuscular adipose tissue (IMAT) is negatively related to insulin sensitivity, but a causal role of IMAT in the development of insulin resistance is unknown. IMAT was sampled in humans to test for the ability to induce insulin resistance in vitro and characterize gene expression to uncover how IMAT may promote skeletal muscle insulin resistance. Human primary muscle cells were incubated with conditioned media from IMAT, visceral (VAT), or subcutaneous adipose tissue (SAT) to evaluate changes in insulin sensitivity. RNAseq analysis was performed on IMAT with gene expression compared with skeletal muscle and SAT, and relationships to insulin sensitivity were determined in men and women spanning a wide range of insulin sensitivity measured by hyperinsulinemic-euglycemic clamp. Conditioned media from IMAT and VAT decreased insulin sensitivity similarly compared with SAT. Multidimensional scaling analysis revealed distinct gene expression patterns in IMAT compared with SAT and muscle. Pathway analysis revealed that IMAT expression of genes in insulin signaling, oxidative phosphorylation, and peroxisomal metabolism related positively to donor insulin sensitivity, whereas expression of macrophage markers, inflammatory cytokines, and secreted extracellular matrix proteins were negatively related to insulin sensitivity. Perilipin 5 gene expression suggested greater IMAT lipolysis in insulin-resistant individuals. Combined, these data show that factors secreted from IMAT modulate muscle insulin sensitivity, possibly via secretion of inflammatory cytokines and extracellular matrix proteins, and by increasing local FFA concentration in humans. These data suggest IMAT may be an important regulator of skeletal muscle insulin sensitivity and could be a novel therapeutic target for skeletal muscle insulin resistance.
Collapse
Affiliation(s)
- Stephan Sachs
- Institute for Diabetes and Regeneration, Helmholtz Zentrum München, German Research Center for Environmental Health , Neuherberg , Germany
| | - Simona Zarini
- University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | - Darcy E Kahn
- University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | | | - Leigh Perreault
- University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | - Tzu Phang
- University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | | | - Allison Strauss
- University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | - Anna Kerege
- University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | | | | | - Thomas Schwarzmayr
- Institute of Human Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health , Neuherberg , Germany
| | - Elisabeth Graf
- Institute of Human Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health , Neuherberg , Germany
| | - Dominik Lutter
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center at Helmholtz Zentrum München, German Research Center for Environmental Health , Neuherberg , Germany
- German Center for Diabetes Research (DZD), München- Neuherberg , Germany
| | - Jan Krumsiek
- Institute of Computational Biology, Helmholtz Zentrum München, Neuherberg, Germany and German Center for Diabetes Research (DZD) , Neuherberg , Germany
| | - Susanna M Hofmann
- Institute for Diabetes and Regeneration, Helmholtz Zentrum München, German Research Center for Environmental Health , Neuherberg , Germany
- German Center for Diabetes Research (DZD), München- Neuherberg , Germany
- Medizinische Klinik and Poliklinik IV, Ludwig-Maximilians University , Munich , Germany
| | - Bryan C Bergman
- University of Colorado Anschutz Medical Campus , Aurora, Colorado
| |
Collapse
|
16
|
Teng S, Huang P. The effect of type 2 diabetes mellitus and obesity on muscle progenitor cell function. Stem Cell Res Ther 2019; 10:103. [PMID: 30898146 PMCID: PMC6427880 DOI: 10.1186/s13287-019-1186-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
In addition to its primary function to provide movement and maintain posture, the skeletal muscle plays important roles in energy and glucose metabolism. In healthy humans, skeletal muscle is the major site for postprandial glucose uptake and impairment of this process contributes to the pathogenesis of type 2 diabetes mellitus (T2DM). A key component to the maintenance of skeletal muscle integrity and plasticity is the presence of muscle progenitor cells, including satellite cells, fibroadipogenic progenitors, and some interstitial progenitor cells associated with vessels (myo-endothelial cells, pericytes, and mesoangioblasts). In this review, we aim to discuss the emerging concepts related to these progenitor cells, focusing on the identification and characterization of distinct progenitor cell populations, and the impact of obesity and T2DM on these cells. The recent advances in stem cell therapies by targeting diabetic and obese muscle are also discussed.
Collapse
Affiliation(s)
- Shuzhi Teng
- The Key Laboratory of Pathobiology, Ministry of Education, Norman Bethune College of Medicine, Jilin University, 126 Xinmin Street, Changchun, Jilin, 130021, People's Republic of China.
| | - Ping Huang
- The Key Laboratory of Pathobiology, Ministry of Education, Norman Bethune College of Medicine, Jilin University, 126 Xinmin Street, Changchun, Jilin, 130021, People's Republic of China.
| |
Collapse
|
17
|
Garneau L, Aguer C. Role of myokines in the development of skeletal muscle insulin resistance and related metabolic defects in type 2 diabetes. DIABETES & METABOLISM 2019; 45:505-516. [PMID: 30844447 DOI: 10.1016/j.diabet.2019.02.006] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 02/04/2019] [Accepted: 02/25/2019] [Indexed: 12/20/2022]
Abstract
Due to its mass, skeletal muscle is the major site of glucose uptake and an important tissue in the development of type 2 diabetes (T2D). Muscles of patients with T2D are affected with insulin resistance and mitochondrial dysfunction, which result in impaired glucose and fatty acid metabolism. A well-established method of managing the muscle metabolic defects occurring in T2D is physical exercise. During exercise, muscles contract and secrete factors called myokines which can act in an autocrine/paracrine fashion to improve muscle energy metabolism. In patients with T2D, plasma levels as well as muscle levels (mRNA and protein) of some myokines are upregulated, while others are downregulated. The signalling pathways of certain myokines are also altered in skeletal muscle of patients with T2D. Taken together, these findings suggest that myokine secretion is an important factor contributing to the development of muscle metabolic defects during T2D. It is also of interest considering that lack of physical activity is closely linked to the occurrence of this disease. The causal relationships between sedentary behavior, factors secreted by skeletal muscle at rest and during contraction and the development of T2D remain to be elucidated. Many myokines shown to influence muscle energy metabolism still have not been characterized in the context of T2D in skeletal muscle specifically. The purpose of this review is to highlight what is known and what remains to be determined regarding myokine secretion in patients with T2D to uncover potential therapeutic targets for the management of this disease.
Collapse
Affiliation(s)
- L Garneau
- University of Ottawa, Faculty of Medicine, Department of Biochemistry, Microbiology and Immunology, Ottawa, ON, K1H 8M5, Canada; Institut du Savoir Montfort - recherche, Ottawa, ON, K1K 0T2, Canada
| | - C Aguer
- University of Ottawa, Faculty of Medicine, Department of Biochemistry, Microbiology and Immunology, Ottawa, ON, K1H 8M5, Canada; Institut du Savoir Montfort - recherche, Ottawa, ON, K1K 0T2, Canada.
| |
Collapse
|
18
|
Begaye L, Simcox JA. Intramuscular adipocytes: a buried adipose tissue depot deserving more exploration. J Lipid Res 2019; 60:753-754. [PMID: 30718285 DOI: 10.1194/jlr.c093047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Affiliation(s)
- Lori Begaye
- Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT
| | - Judith A Simcox
- Department of Biochemistry, University of Wisconsin, Madison, WI.
| |
Collapse
|
19
|
Valencia AP, Lai JK, Iyer SR, Mistretta KL, Spangenburg EE, Davis DL, Lovering RM, Gilotra MN. Fatty Infiltration Is a Prognostic Marker of Muscle Function After Rotator Cuff Tear. Am J Sports Med 2018; 46:2161-2169. [PMID: 29750541 PMCID: PMC6397750 DOI: 10.1177/0363546518769267] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Massive rotator cuff tears (RCTs) begin as primary tendon injuries and cause a myriad of changes in the muscle, including atrophy, fatty infiltration (FI), and fibrosis. However, it is unclear which changes are most closely associated with muscle function. PURPOSE To determine if FI of the supraspinatus muscle after acute RCT relates to short-term changes in muscle function. STUDY DESIGN Controlled laboratory study. METHODS Unilateral RCTs were induced in female rabbits via tenotomy of the supraspinatus and infraspinatus. Maximal isometric force and rate of fatigue were measured in the supraspinatus in vivo at 6 and 12 weeks after tenotomy. Computed tomography scanning was performed, followed by histologic analysis of myofiber size, FI, and fibrosis. RESULTS Tenotomy resulted in supraspinatus weakness, reduced myofiber size, FI, and fibrosis, but no differences were evident between 6 and 12 weeks after tenotomy except for increased collagen content at 12 weeks. FI was a predictor of supraspinatus weakness and was strongly correlated to force, even after accounting for muscle cross-sectional area. While muscle atrophy accounted for the loss in force in tenotomized muscles with minimal FI, it did not account for the greater loss in force in tenotomized muscles with the most FI. Collagen content was not strongly correlated with maximal isometric force, even when normalized to muscle size. CONCLUSION After RCT, muscle atrophy results in the loss of contractile force from the supraspinatus, but exacerbated weakness is observed with increased FI. Therefore, the level of FI can help predict contractile function of torn rotator cuff muscles. CLINICAL RELEVANCE Markers to predict contractile function of RCTs will help determine the appropriate treatment to improve functional recovery after RCTs.
Collapse
Affiliation(s)
- Ana P. Valencia
- Department of Orthopaedics, School of Medicine, University of Maryland, Baltimore, Maryland, USA
- Department of Kinesiology, School of Public Health, University of Maryland, Baltimore, Maryland, USA
| | - Jim K. Lai
- Department of Orthopaedics, School of Medicine, University of Maryland, Baltimore, Maryland, USA
| | - Shama R. Iyer
- Department of Orthopaedics, School of Medicine, University of Maryland, Baltimore, Maryland, USA
| | - Katherine L. Mistretta
- Department of Orthopaedics, School of Medicine, University of Maryland, Baltimore, Maryland, USA
| | - Espen E. Spangenburg
- Department of Physiology, East Carolina Diabetes and Obesity Institute, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA
| | - Derik L. Davis
- Department of Diagnostic Radiology and Nuclear Medicine, School of Medicine, University of Maryland, Baltimore, Maryland, USA
| | - Richard M. Lovering
- Department of Orthopaedics, School of Medicine, University of Maryland, Baltimore, Maryland, USA
- Department of Physiology, School of Medicine, University of Maryland, Baltimore, Maryland, USA
| | - Mohit N. Gilotra
- Department of Orthopaedics, School of Medicine, University of Maryland, Baltimore, Maryland, USA
- Department of Orthopaedics, Baltimore Veteran Affairs Medical Center, Baltimore, Maryland, USA
- Address correspondence to Mohit N. Gilotra, MD, Department of Orthopaedics, School of Medicine and VA Maryland Health Care System, University of Maryland, AHB, Rm 540, 100 Penn St, Baltimore, MD 21201, USA ()
| | | |
Collapse
|
20
|
Breuker C, Amouzou C, Fabre O, Lambert K, Seyer P, Bourret A, Salehzada T, Mercier J, Sultan A, Bisbal C. Decreased RNF41 expression leads to insulin resistance in skeletal muscle of obese women. Metabolism 2018; 83:81-91. [PMID: 29410345 DOI: 10.1016/j.metabol.2018.01.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 12/22/2017] [Accepted: 01/17/2018] [Indexed: 01/30/2023]
Abstract
CONTEXT Toll-like receptor 4 (TLR4) activation contributes to obesity-associated insulin resistance in skeletal muscles (SM). TLR4 signaling involves two pathways: the myeloid differentiation primary response gene 88 (MyD88) leading to inflammatory cytokines production and the toll/interleukin-1 receptor domain-containing adapter-inducing interferon (IFN) I (TRIF)-dependent pathways leading to type 1 interferon (IFNI) and interferon stimulated genes (ISG) expression. The E3 ubiquitin ligase RNF41 allows the preferential activation of the TRIF-IFNI pathway; however, its role in insulin response has not been reported. METHODS We measured RNF41 level and IFNI pathway activation (ISG expression) in SM biopsies of obese insulin sensitive (OIS) and obese insulin resistant (OIR) women. Then we isolated and differentiated in myotubes, primary human SM cell progenitors from OIS and OIR SM biopsies. We modulated RNF41 and ISG expression in these myotubes and investigated their effects on insulin response. RESULTS RNF41 expression is down-regulated in vivo in OIR SM and myotubes compared to OIS SM and myotubes. TLR4 activation with palmitate induces TRIF-IFNI pathway and ISG in OIS myotubes but not in OIR myotubes. Inhibition of RNF41 expression with siRNF41 in OIS myotubes treated with palmitate attenuates insulin response, IFNI pathway activation and ISG induction, mimicking OIR phenotype. Further, overexpression of RNF41 in OIR myotubes increases insulin response and ISG expression. Exposure to IFNI or to its inducer polyinosinic-polycytidylic acid, restores ISG expression and insulin sensitivity in OIR myotubes and OIS myotubes transfected with siRNF41. CONCLUSION Our results identify RNF41 as essential to IFNI pathway activation in order to maintain muscle insulin sensitivity during human obesity.
Collapse
Affiliation(s)
- Cyril Breuker
- PhyMedExp, University of Montpellier, INSERM U1046, CNRS UMR 9214, 34295 Montpellier cedex 5, France; Centre Hospitalier Universitaire (CHU) Montpellier, 34295 Montpellier, France
| | - Cacylde Amouzou
- PhyMedExp, University of Montpellier, INSERM U1046, CNRS UMR 9214, 34295 Montpellier cedex 5, France
| | - Odile Fabre
- PhyMedExp, University of Montpellier, INSERM U1046, CNRS UMR 9214, 34295 Montpellier cedex 5, France
| | - Karen Lambert
- PhyMedExp, University of Montpellier, INSERM U1046, CNRS UMR 9214, 34295 Montpellier cedex 5, France
| | - Pascal Seyer
- PhyMedExp, University of Montpellier, INSERM U1046, CNRS UMR 9214, 34295 Montpellier cedex 5, France
| | - Annick Bourret
- PhyMedExp, University of Montpellier, INSERM U1046, CNRS UMR 9214, 34295 Montpellier cedex 5, France
| | - Tamim Salehzada
- PhyMedExp, University of Montpellier, INSERM U1046, CNRS UMR 9214, 34295 Montpellier cedex 5, France
| | - Jacques Mercier
- PhyMedExp, University of Montpellier, INSERM U1046, CNRS UMR 9214, 34295 Montpellier cedex 5, France; Centre Hospitalier Universitaire (CHU) Montpellier, 34295 Montpellier, France
| | - Ariane Sultan
- PhyMedExp, University of Montpellier, INSERM U1046, CNRS UMR 9214, 34295 Montpellier cedex 5, France; Centre Hospitalier Universitaire (CHU) Montpellier, 34295 Montpellier, France
| | - Catherine Bisbal
- PhyMedExp, University of Montpellier, INSERM U1046, CNRS UMR 9214, 34295 Montpellier cedex 5, France.
| |
Collapse
|
21
|
Rotini A, Martínez-Sarrà E, Duelen R, Costamagna D, Di Filippo ES, Giacomazzi G, Grosemans H, Fulle S, Sampaolesi M. Aging affects the in vivo regenerative potential of human mesoangioblasts. Aging Cell 2018; 17. [PMID: 29397577 PMCID: PMC5847873 DOI: 10.1111/acel.12714] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/22/2017] [Indexed: 01/29/2023] Open
Abstract
Sarcopenia is the age‐related loss of muscle mass, strength, and function. Although the role of human satellite cells (SCs) as adult skeletal muscle stem cells has been deeply investigated, little is known about the impact of aging on muscle interstitial stem cells. Here, we isolated the non‐SC CD56– fraction from human muscle biopsies of young and elderly subjects. The elderly interstitial cell population contained a higher number of CD15+ and PDGFRα+ cells when compared to young samples. In addition, we found that the CD56–/ALP+ cells were well represented as a multipotent stem cell population inside the CD56– fraction. CD56–/ALP+/CD15– cells were clonogenic, and since they were myogenic and expressed NG2, α‐SMA and PDGFRβ can be considered mesoangioblasts (MABs). Interestingly, elderly MABs displayed a dramatic impairment in the myogenic differentiation ability in vitro and when transplanted in dystrophic immunodeficient Sgcb‐null Rag2‐null γc‐null mice. In addition, elderly MABs proliferated less, but yet retained other multilineage capabilities. Overall, our results indicate that aging negatively impacted on the regenerative potential of MABs and this should be carefully considered for potential therapeutic applications of MABs.
Collapse
Affiliation(s)
- Alessio Rotini
- Translational Cardiomyology Laboratory; Stem Cell Institute of Leuven; Unit of Stem Cell Research; Cluster of Stem Cell and Developmental Biology; Department of Development and Regeneration; University of Leuven; Leuven Belgium
- Department of Neuroscience, Imaging and Clinical Sciences; University “G. d'Annunzio” Chieti-Pescara; Chieti Italy
- Interuniversity Institute of Myology; Chieti Italy
| | - Ester Martínez-Sarrà
- Translational Cardiomyology Laboratory; Stem Cell Institute of Leuven; Unit of Stem Cell Research; Cluster of Stem Cell and Developmental Biology; Department of Development and Regeneration; University of Leuven; Leuven Belgium
| | - Robin Duelen
- Translational Cardiomyology Laboratory; Stem Cell Institute of Leuven; Unit of Stem Cell Research; Cluster of Stem Cell and Developmental Biology; Department of Development and Regeneration; University of Leuven; Leuven Belgium
| | - Domiziana Costamagna
- Translational Cardiomyology Laboratory; Stem Cell Institute of Leuven; Unit of Stem Cell Research; Cluster of Stem Cell and Developmental Biology; Department of Development and Regeneration; University of Leuven; Leuven Belgium
| | - Ester Sara Di Filippo
- Department of Neuroscience, Imaging and Clinical Sciences; University “G. d'Annunzio” Chieti-Pescara; Chieti Italy
- Interuniversity Institute of Myology; Chieti Italy
| | - Giorgia Giacomazzi
- Translational Cardiomyology Laboratory; Stem Cell Institute of Leuven; Unit of Stem Cell Research; Cluster of Stem Cell and Developmental Biology; Department of Development and Regeneration; University of Leuven; Leuven Belgium
| | - Hanne Grosemans
- Translational Cardiomyology Laboratory; Stem Cell Institute of Leuven; Unit of Stem Cell Research; Cluster of Stem Cell and Developmental Biology; Department of Development and Regeneration; University of Leuven; Leuven Belgium
| | - Stefania Fulle
- Department of Neuroscience, Imaging and Clinical Sciences; University “G. d'Annunzio” Chieti-Pescara; Chieti Italy
- Interuniversity Institute of Myology; Chieti Italy
| | - Maurilio Sampaolesi
- Translational Cardiomyology Laboratory; Stem Cell Institute of Leuven; Unit of Stem Cell Research; Cluster of Stem Cell and Developmental Biology; Department of Development and Regeneration; University of Leuven; Leuven Belgium
- Interuniversity Institute of Myology; Chieti Italy
- Human Anatomy Unit; Department of Public Health, Experimental and Forensic Medicine; University of Pavia; Pavia Italy
| |
Collapse
|
22
|
Gorski T, Mathes S, Krützfeldt J. Uncoupling protein 1 expression in adipocytes derived from skeletal muscle fibro/adipogenic progenitors is under genetic and hormonal control. J Cachexia Sarcopenia Muscle 2018; 9:384-399. [PMID: 29399988 PMCID: PMC5879989 DOI: 10.1002/jcsm.12277] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 09/29/2017] [Accepted: 11/20/2017] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Intramuscular fatty infiltration is generally associated with the accumulation of white adipocytes in skeletal muscle and unfavourable metabolic outcomes. It is, however, still unclear whether intramuscular adipocytes could also acquire a brown-like phenotype. Here, we detected intramuscular expression of brown adipocyte markers during fatty infiltration in an obesity-resistant mouse strain and extensively compared the potential of two different stem cell populations residing in skeletal muscle to differentiate into brown-like adipocytes. METHODS Fatty infiltration was induced using intramuscular glycerol or cardiotoxin injection in the tibialis anterior muscles of young or aged 129S6/SvEvTac (Sv/129) mice or interleukin-6 (IL-6) knockout mice, and the expression of general and brown adipocyte markers was assessed after 4 weeks. Fibro/adipogenic progenitors (FAPs) and myogenic progenitors were prospectively isolated using fluorescence-activated cell sorting from skeletal muscle of male and female C57Bl6/6J and Sv/129 mice, and monoclonal and polyclonal cultures were treated with brown adipogenic medium. Additionally, FAPs were differentiated with medium supplemented or not with triiodothyronine. RESULTS Although skeletal muscle expression of uncoupling protein 1 (Ucp1) was barely detectable in uninjected tibialis anterior muscle, it was drastically induced following intramuscular adipogenesis in Sv/129 mice and further increased in response to beta 3-adrenergic stimulation. Intramuscular Ucp1 expression did not depend on IL-6 and was preserved in aged skeletal muscle. Myogenic progenitors did not form adipocytes neither in polyclonal nor monoclonal cultures. Fibro/adipogenic progenitors, on the other hand, readily differentiated into brown-like, UCP1+ adipocytes. Uncoupling protein 1 expression in differentiated FAPs was regulated by genetic background, sex, and triiodothyronine treatment independently of adipogenic differentiation levels. CONCLUSIONS Intramuscular adipogenesis is associated with increased Ucp1 expression in skeletal muscle from obesity-resistant mice. Fibro/adipogenic progenitors provide a likely source for intramuscular adipocytes expressing UCP1 under control of both genetic and hormonal factors. Therefore, FAPs constitute a possible target for therapies aiming at the browning of intramuscular adipose tissue and the metabolic improvement of skeletal muscle affected by fatty infiltration.
Collapse
Affiliation(s)
- Tatiane Gorski
- Division of Endocrinology, Diabetes, and Clinical NutritionUniversity Hospital ZürichRämistrasse 100Zürich8091Switzerland
- Competence Center Personalized Medicine UZH/ETHETH Zürich and University of ZürichZürichSwitzerland
| | - Sebastian Mathes
- Division of Endocrinology, Diabetes, and Clinical NutritionUniversity Hospital ZürichRämistrasse 100Zürich8091Switzerland
- Zürich Center for Integrative Human PhysiologyUniversity of ZürichZürichSwitzerland
| | - Jan Krützfeldt
- Division of Endocrinology, Diabetes, and Clinical NutritionUniversity Hospital ZürichRämistrasse 100Zürich8091Switzerland
- Competence Center Personalized Medicine UZH/ETHETH Zürich and University of ZürichZürichSwitzerland
- Zürich Center for Integrative Human PhysiologyUniversity of ZürichZürichSwitzerland
| |
Collapse
|
23
|
Pagano AF, Brioche T, Arc-Chagnaud C, Demangel R, Chopard A, Py G. Short-term disuse promotes fatty acid infiltration into skeletal muscle. J Cachexia Sarcopenia Muscle 2018; 9:335-347. [PMID: 29248005 PMCID: PMC5879967 DOI: 10.1002/jcsm.12259] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 09/10/2017] [Accepted: 10/02/2017] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Many physiological and/or pathological conditions lead to muscle deconditioning, a well-described phenomenon characterized by a loss of strength and muscle power mainly due to the loss of muscle mass. Fatty infiltrations, or intermuscular adipose tissue (IMAT), are currently well-recognized components of muscle deconditioning. Despite the fact that IMAT is present in healthy human skeletal muscle, its increase and accumulation are linked to muscle dysfunction. Although IMAT development has been largely attributable to inactivity, the precise mechanisms of its establishment are still poorly understood. Because the sedentary lifestyle that accompanies age-related sarcopenia may favour IMAT development, deciphering the early processes of muscle disuse is of great importance before implementing strategies to limit IMAT deposition. METHODS In our study, we took advantage of the dry immersion (DI) model of severe muscle inactivity to induce rapid muscle deconditioning during a short period. During the DI, healthy adult men (n = 12; age: 32 ± 5) remained strictly immersed, in a supine position, in a controlled thermo-neutral water bath. Skeletal muscle biopsies were obtained from the vastus lateralis before and after 3 days of DI. RESULTS We showed that DI for only 3 days was able to decrease myofiber cross-sectional areas (-10.6%). Moreover, protein expression levels of two key markers commonly used to assess IMAT, perilipin, and fatty acid binding protein 4, were upregulated. We also observed an increase in the C/EBPα and PPARγ protein expression levels, indicating an increase in late adipogenic processes leading to IMAT development. While many stem cells in the muscle environment can adopt the capacity to differentiate into adipocytes, fibro-adipogenic progenitors (FAPs) represent the population that appears to play a major role in IMAT development. In our study, we showed an increase in the protein expression of PDGFRα, the specific cell surface marker of FAPs, in response to 3 days of DI. It is well recognized that an unfavourable muscle environment drives FAPs to ectopic adiposity and/or fibrosis. CONCLUSIONS This study is the first to emphasize that during a short period of severe inactivity, muscle deconditioning is associated with IMAT development. Our study also reveals that FAPs could be the main resident muscle stem cell population implicated in ectopic adiposity development in human skeletal muscle.
Collapse
Affiliation(s)
- Allan F Pagano
- INRA, UMR866 Dynamique Musculaire et Métabolisme, Université de Montpellier, F-34060, Montpellier, France
| | - Thomas Brioche
- INRA, UMR866 Dynamique Musculaire et Métabolisme, Université de Montpellier, F-34060, Montpellier, France
| | - Coralie Arc-Chagnaud
- INRA, UMR866 Dynamique Musculaire et Métabolisme, Université de Montpellier, F-34060, Montpellier, France.,Freshage Research Group - Dept. Physiology, University of Valencia, CIBERFES, INCLIVA, Valencia, Spain
| | - Rémi Demangel
- INRA, UMR866 Dynamique Musculaire et Métabolisme, Université de Montpellier, F-34060, Montpellier, France
| | - Angèle Chopard
- INRA, UMR866 Dynamique Musculaire et Métabolisme, Université de Montpellier, F-34060, Montpellier, France
| | - Guillaume Py
- INRA, UMR866 Dynamique Musculaire et Métabolisme, Université de Montpellier, F-34060, Montpellier, France
| |
Collapse
|
24
|
Henriksen TI, Davidsen PK, Pedersen M, Schultz HS, Hansen NS, Larsen TJ, Vaag A, Pedersen BK, Nielsen S, Scheele C. Dysregulation of a novel miR-23b/27b-p53 axis impairs muscle stem cell differentiation of humans with type 2 diabetes. Mol Metab 2017; 6:770-779. [PMID: 28702332 PMCID: PMC5485225 DOI: 10.1016/j.molmet.2017.04.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 04/06/2017] [Accepted: 04/20/2017] [Indexed: 12/25/2022] Open
Abstract
Objective MicroRNAs (miRNAs) are increasingly recognized as fine-tuning regulators of metabolism, and are dysregulated in several disease conditions. With their capacity to rapidly change gene expression, miRNAs are also important regulators of development and cell differentiation. In the current study, we describe an impaired myogenic capacity of muscle stem cells isolated from humans with type 2 diabetes (T2DM) and assess whether this phenotype is regulated by miRNAs. Methods We measured global miRNA expression during in vitro differentiation of muscle stem cells derived from T2DM patients and healthy controls. Results The mir-23b/27b cluster was downregulated in the cells of the patients, and a pro-myogenic effect of these miRNAs was mediated through the p53 pathway, which was concordantly dysregulated in the muscle cells derived from humans with T2DM. Conclusions Our results indicate that we have identified a novel pathway for coordination of myogenesis, the miR-23b/27b-p53 axis that, when dysregulated, potentially contributes to a sustained muscular dysfunction in T2DM. miR-23b and miR-27b are pro-myogenic and are downregulated in T2DM. miR-23b and miR-27b regulate myogenesis through the p53 pathway. The p53 pathway is concordantly dysregulated in T2DM.
Collapse
Affiliation(s)
- Tora I. Henriksen
- The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen Denmark
| | - Peter K. Davidsen
- The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen Denmark
- Centre for Computational Biology and Modelling, Institute for Integrative Biology, University of Liverpool, Crown Street, Liverpool, L69 7ZB, UK
| | - Maria Pedersen
- The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen Denmark
| | | | - Ninna S. Hansen
- Department of Endocrinology, Diabetes and Metabolism, Rigshospitalet, Copenhagen, Denmark
| | - Therese J. Larsen
- The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen Denmark
- Danish Diabetes Academy, Odense, Denmark
| | - Allan Vaag
- Department of Endocrinology, Diabetes and Metabolism, Rigshospitalet, Copenhagen, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Bente K. Pedersen
- The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Søren Nielsen
- The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen Denmark
| | - Camilla Scheele
- The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen Denmark
- Novo Nordisk Foundation Center, Section for Basic Metabolic Research, Faculty of Health and Medical Science, University of Copenhagen, Copenhagen, Denmark
- Corresponding author. Centre of Inflammation and Metabolism, Rigshospitalet – Section 7641, Blegdamsvej 9, DK-2100 Copenhagen, Denmark. Fax: +45 3545 7644.Centre of Inflammation and MetabolismRigshospitalet – Section 7641Blegdamsvej 9CopenhagenDK-2100Denmark
| |
Collapse
|
25
|
Laurens C, Bourlier V, Mairal A, Louche K, Badin PM, Mouisel E, Montagner A, Marette A, Tremblay A, Weisnagel JS, Guillou H, Langin D, Joanisse DR, Moro C. Perilipin 5 fine-tunes lipid oxidation to metabolic demand and protects against lipotoxicity in skeletal muscle. Sci Rep 2016; 6:38310. [PMID: 27922115 PMCID: PMC5138838 DOI: 10.1038/srep38310] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 11/07/2016] [Indexed: 11/09/2022] Open
Abstract
Lipid droplets (LD) play a central role in lipid homeostasis by controlling transient fatty acid (FA) storage and release from triacylglycerols stores, while preventing high levels of cellular toxic lipids. This crucial function in oxidative tissues is altered in obesity and type 2 diabetes. Perilipin 5 (PLIN5) is a LD protein whose mechanistic and causal link with lipotoxicity and insulin resistance has raised controversies. We investigated here the physiological role of PLIN5 in skeletal muscle upon various metabolic challenges. We show that PLIN5 protein is elevated in endurance-trained (ET) subjects and correlates with muscle oxidative capacity and whole-body insulin sensitivity. When overexpressed in human skeletal muscle cells to recapitulate the ET phenotype, PLIN5 diminishes lipolysis and FA oxidation under basal condition, but paradoxically enhances FA oxidation during forskolin- and contraction- mediated lipolysis. Moreover, PLIN5 partly protects muscle cells against lipid-induced lipotoxicity. In addition, we demonstrate that down-regulation of PLIN5 in skeletal muscle inhibits insulin-mediated glucose uptake under normal chow feeding condition, while paradoxically improving insulin sensitivity upon high-fat feeding. These data highlight a key role of PLIN5 in LD function, first by finely adjusting LD FA supply to mitochondrial oxidation, and second acting as a protective factor against lipotoxicity in skeletal muscle.
Collapse
Affiliation(s)
- Claire Laurens
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France.,University of Toulouse, Paul Sabatier University, France
| | - Virginie Bourlier
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France.,University of Toulouse, Paul Sabatier University, France
| | - Aline Mairal
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France.,University of Toulouse, Paul Sabatier University, France
| | - Katie Louche
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France.,University of Toulouse, Paul Sabatier University, France
| | - Pierre-Marie Badin
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France.,University of Toulouse, Paul Sabatier University, France
| | - Etienne Mouisel
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France.,University of Toulouse, Paul Sabatier University, France
| | - Alexandra Montagner
- University of Toulouse, Paul Sabatier University, France.,INRA, UMR 1331, TOXALIM, Toulouse, France
| | - André Marette
- Department of Medicine, Laval University, Quebec City, Canada.,Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Laval University, Quebec City, Canada
| | - Angelo Tremblay
- Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Laval University, Quebec City, Canada.,Department of Kinesiology, Laval University, Quebec City, Canada
| | | | - Hervé Guillou
- University of Toulouse, Paul Sabatier University, France.,INRA, UMR 1331, TOXALIM, Toulouse, France
| | - Dominique Langin
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France.,University of Toulouse, Paul Sabatier University, France.,Toulouse University Hospitals, Department of Clinical Biochemistry, Toulouse, France
| | - Denis R Joanisse
- Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Laval University, Quebec City, Canada.,Department of Kinesiology, Laval University, Quebec City, Canada
| | - Cedric Moro
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France.,University of Toulouse, Paul Sabatier University, France
| |
Collapse
|
26
|
Laurens C, Badin PM, Louche K, Mairal A, Tavernier G, Marette A, Tremblay A, Weisnagel SJ, Joanisse DR, Langin D, Bourlier V, Moro C. G0/G1 Switch Gene 2 controls adipose triglyceride lipase activity and lipid metabolism in skeletal muscle. Mol Metab 2016; 5:527-537. [PMID: 27408777 PMCID: PMC4921782 DOI: 10.1016/j.molmet.2016.04.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 04/12/2016] [Accepted: 04/13/2016] [Indexed: 12/27/2022] Open
Abstract
OBJECTIVE Recent data suggest that adipose triglyceride lipase (ATGL) plays a key role in providing energy substrate from triglyceride pools and that alterations of its expression/activity relate to metabolic disturbances in skeletal muscle. Yet little is known about its regulation. We here investigated the role of the protein G0/G1 Switch Gene 2 (G0S2), recently described as an inhibitor of ATGL in white adipose tissue, in the regulation of lipolysis and oxidative metabolism in skeletal muscle. METHODS We first examined G0S2 protein expression in relation to metabolic status and muscle characteristics in humans. We next overexpressed and knocked down G0S2 in human primary myotubes to assess its impact on ATGL activity, lipid turnover and oxidative metabolism, and further knocked down G0S2 in vivo in mouse skeletal muscle. RESULTS G0S2 protein is increased in skeletal muscle of endurance-trained individuals and correlates with markers of oxidative capacity and lipid content. Recombinant G0S2 protein inhibits ATGL activity by about 40% in lysates of mouse and human skeletal muscle. G0S2 overexpression augments (+49%, p < 0.05) while G0S2 knockdown strongly reduces (-68%, p < 0.001) triglyceride content in human primary myotubes and mouse skeletal muscle. We further show that G0S2 controls lipolysis and fatty acid oxidation in a strictly ATGL-dependent manner. These metabolic adaptations mediated by G0S2 are paralleled by concomitant changes in glucose metabolism through the modulation of Pyruvate Dehydrogenase Kinase 4 (PDK4) expression (5.4 fold, p < 0.001). Importantly, downregulation of G0S2 in vivo in mouse skeletal muscle recapitulates changes in lipid metabolism observed in vitro. CONCLUSION Collectively, these data indicate that G0S2 plays a key role in the regulation of skeletal muscle ATGL activity, lipid content and oxidative metabolism.
Collapse
Affiliation(s)
- Claire Laurens
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France; University of Toulouse, Paul Sabatier University, France
| | - Pierre-Marie Badin
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France; University of Toulouse, Paul Sabatier University, France
| | - Katie Louche
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France; University of Toulouse, Paul Sabatier University, France
| | - Aline Mairal
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France; University of Toulouse, Paul Sabatier University, France
| | - Geneviève Tavernier
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France; University of Toulouse, Paul Sabatier University, France
| | - André Marette
- Department of Medicine, Canada; Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Canada
| | - Angelo Tremblay
- Department of Kinesiology, Canada; Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Canada
| | | | - Denis R Joanisse
- Department of Kinesiology, Canada; Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Canada
| | - Dominique Langin
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France; University of Toulouse, Paul Sabatier University, France; Toulouse University Hospitals, Department of Clinical Biochemistry, Toulouse, France
| | - Virginie Bourlier
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France; University of Toulouse, Paul Sabatier University, France
| | - Cedric Moro
- INSERM, UMR1048, Institute of Metabolic and Cardiovascular Diseases, Toulouse, France; University of Toulouse, Paul Sabatier University, France.
| |
Collapse
|
27
|
Brioche T, Pagano AF, Py G, Chopard A. Muscle wasting and aging: Experimental models, fatty infiltrations, and prevention. Mol Aspects Med 2016; 50:56-87. [PMID: 27106402 DOI: 10.1016/j.mam.2016.04.006] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Revised: 04/13/2016] [Accepted: 04/13/2016] [Indexed: 12/21/2022]
Abstract
Identification of cost-effective interventions to maintain muscle mass, muscle strength, and physical performance during muscle wasting and aging is an important public health challenge. It requires understanding of the cellular and molecular mechanisms involved. Muscle-deconditioning processes have been deciphered by means of several experimental models, bringing together the opportunities to devise comprehensive analysis of muscle wasting. Studies have increasingly recognized the importance of fatty infiltrations or intermuscular adipose tissue for the age-mediated loss of skeletal-muscle function and emphasized that this new important factor is closely linked to inactivity. The present review aims to address three main points. We first mainly focus on available experimental models involving cell, animal, or human experiments on muscle wasting. We next point out the role of intermuscular adipose tissue in muscle wasting and aging and try to highlight new findings concerning aging and muscle-resident mesenchymal stem cells called fibro/adipogenic progenitors by linking some cellular players implicated in both FAP fate modulation and advancing age. In the last part, we review the main data on the efficiency and molecular and cellular mechanisms by which exercise, replacement hormone therapies, and β-hydroxy-β-methylbutyrate prevent muscle wasting and sarcopenia. Finally, we will discuss a potential therapeutic target of sarcopenia: glucose 6-phosphate dehydrogenase.
Collapse
Affiliation(s)
- Thomas Brioche
- Université de Montpellier, INRA, UMR 866 Dynamique Musculaire et Métabolisme, Montpellier F-34060, France.
| | - Allan F Pagano
- Université de Montpellier, INRA, UMR 866 Dynamique Musculaire et Métabolisme, Montpellier F-34060, France
| | - Guillaume Py
- Université de Montpellier, INRA, UMR 866 Dynamique Musculaire et Métabolisme, Montpellier F-34060, France
| | - Angèle Chopard
- Université de Montpellier, INRA, UMR 866 Dynamique Musculaire et Métabolisme, Montpellier F-34060, France
| |
Collapse
|