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Pan X, Ye L, Guo X, Wang W, Zhang Z, Wang Q, Huang J, Xu J, Cai Y, Shou X, Wang Y, Feng Y, Xie C, Shan P, Meng ZX. Glutamine Production by Glul Promotes Thermogenic Adipocyte Differentiation Through Prdm9-Mediated H3K4me3 and Transcriptional Reprogramming. Diabetes 2023; 72:1574-1596. [PMID: 37579296 DOI: 10.2337/db23-0162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Accepted: 08/09/2023] [Indexed: 08/16/2023]
Abstract
Thermogenic adipocytes have been extensively investigated because of their energy-dissipating property and therapeutic potential for obesity and diabetes. Besides serving as fuel sources, accumulating evidence suggests that intermediate metabolites play critical roles in multiple biological processes. However, their role in adipocyte differentiation and thermogenesis remains unexplored. Here, we report that human and mouse obesity is associated with marked downregulation of glutamine synthetase (Glul) expression and activity in thermogenic adipose tissues. Glul is robustly upregulated during brown adipocyte (BAC) differentiation and in brown adipose tissue (BAT) upon cold exposure and Cl316,243 stimulation. Further genetic, pharmacologic, or metabolic manipulations of Glul and glutamine levels reveal that glutamine cells autonomously stimulate BAC differentiation and function and BAT remodeling and improve systemic energy homeostasis in mice. Mechanistically, glutamine promotes transcriptional induction of adipogenic and thermogenic gene programs through histone modification-mediated chromatin remodeling. Among all the glutamine-regulated writer and eraser genes responsible for histone methylation and acetylation, only Prdm9, a histone lysine methyltransferase, is robustly induced during BAC differentiation. Importantly, Prdm9 inactivation by shRNA knockdown or a selective inhibitor attenuates glutamine-triggered adipogenic and thermogenic induction. Furthermore, Prdm9 gene transcription is regulated by glutamine through the recruitment of C/EBPb to its enhancer region. This work reveals glutamine as a novel activator of thermogenic adipocyte differentiation and uncovers an unexpected role of C/EBPb-Prdm9-mediated H3K4me3 and transcriptional reprogramming in adipocyte differentiation and thermogenesis. ARTICLE HIGHLIGHTS
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Affiliation(s)
- Xiaowen Pan
- Department of Pathology and Pathophysiology and Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Key Laboratory of Disease Proteomics of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Lingxia Ye
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Xiaozhen Guo
- State Key Laboratory of Drug Research, Shanghai Institute of Material Medical, Chinese Academy of Sciences, Shanghai, China
| | - Weihua Wang
- Department of Pathology and Pathophysiology and Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Key Laboratory of Disease Proteomics of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Ziyin Zhang
- Department of Pathology and Pathophysiology and Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Key Laboratory of Disease Proteomics of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Qintao Wang
- Department of Pathology and Pathophysiology and Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Key Laboratory of Disease Proteomics of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Jingjing Huang
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Jingya Xu
- Department of Pathology and Pathophysiology and Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Key Laboratory of Disease Proteomics of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Yanhan Cai
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Xinxin Shou
- Department of Pathology and Pathophysiology and Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Yuting Wang
- Department of Endocrinology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Yu Feng
- Department of Endocrinology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Cen Xie
- State Key Laboratory of Drug Research, Shanghai Institute of Material Medical, Chinese Academy of Sciences, Shanghai, China
| | - Pengfei Shan
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Zhuo-Xian Meng
- Department of Pathology and Pathophysiology and Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Key Laboratory of Disease Proteomics of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Department of Geriatrics, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Chronic Disease Research Institute, Zhejiang University School of Public Health, Hangzhou, China
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Pu M, Zheng W, Zhang H, Wan W, Peng C, Chen X, Liu X, Xu Z, Zhou T, Sun Q, Neculai D, Liu W. ORP8 acts as a lipophagy receptor to mediate lipid droplet turnover. Protein Cell 2023; 14:653-667. [PMID: 37707322 PMCID: PMC10501187 DOI: 10.1093/procel/pwac063] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 11/22/2022] [Indexed: 09/15/2023] Open
Abstract
Lipophagy, the selective engulfment of lipid droplets (LDs) by autophagosomes for lysosomal degradation, is critical to lipid and energy homeostasis. Here we show that the lipid transfer protein ORP8 is located on LDs and mediates the encapsulation of LDs by autophagosomal membranes. This function of ORP8 is independent of its lipid transporter activity and is achieved through direct interaction with phagophore-anchored LC3/GABARAPs. Upon lipophagy induction, ORP8 has increased localization on LDs and is phosphorylated by AMPK, thereby enhancing its affinity for LC3/GABARAPs. Deletion of ORP8 or interruption of ORP8-LC3/GABARAP interaction results in accumulation of LDs and increased intracellular triglyceride. Overexpression of ORP8 alleviates LD and triglyceride deposition in the liver of ob/ob mice, and Osbpl8-/- mice exhibit liver lipid clearance defects. Our results suggest that ORP8 is a lipophagy receptor that plays a key role in cellular lipid metabolism.
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Affiliation(s)
- Maomao Pu
- Metabolic Medicine Center, International Institutes of Medicine, the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu 322000, China
| | - Wenhui Zheng
- Metabolic Medicine Center, International Institutes of Medicine, the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu 322000, China
| | - Hongtao Zhang
- Metabolic Medicine Center, International Institutes of Medicine, the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu 322000, China
| | - Wei Wan
- Metabolic Medicine Center, International Institutes of Medicine, the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu 322000, China
| | - Chao Peng
- National Center for Protein Science Shanghai, Institute of Biochemistry and Cell Biology, Shanghai Institutes of Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Xuebo Chen
- Metabolic Medicine Center, International Institutes of Medicine, the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu 322000, China
| | - Xinchang Liu
- Metabolic Medicine Center, International Institutes of Medicine, the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu 322000, China
| | - Zizhen Xu
- Metabolic Medicine Center, International Institutes of Medicine, the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu 322000, China
| | - Tianhua Zhou
- Metabolic Medicine Center, International Institutes of Medicine, the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu 322000, China
| | - Qiming Sun
- Metabolic Medicine Center, International Institutes of Medicine, the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu 322000, China
| | - Dante Neculai
- Metabolic Medicine Center, International Institutes of Medicine, the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu 322000, China
| | - Wei Liu
- Metabolic Medicine Center, International Institutes of Medicine, the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu 322000, China
- Joint Institute of Genetics and Genomics Medicine between Zhejiang University and University of Toronto, Hangzhou 310058, China
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Xu J, Li X, Chen W, Zhang Z, Zhou Y, Gou Y, Lv CA, Jin L, Qiu X, Ma S, Wu QQ, Liu T, Mi L, Yang Z, Yu T, Pan X, Feng Y, Shan P, Meng ZX. Myofiber Baf60c controls muscle regeneration by modulating Dkk3-mediated paracrine signaling. J Exp Med 2023; 220:214151. [PMID: 37284884 DOI: 10.1084/jem.20221123] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 01/26/2023] [Accepted: 03/22/2023] [Indexed: 06/08/2023] Open
Abstract
Obesity and type 2 diabetes (T2D) are the leading causes of the progressive decline in muscle regeneration and fitness in adults. The muscle microenvironment is known to play a key role in controlling muscle stem cell regenerative capacity, yet the underlying mechanism remains elusive. Here, we found that Baf60c expression in skeletal muscle is significantly downregulated in obese and T2D mice and humans. Myofiber-specific ablation of Baf60c in mice impairs muscle regeneration and contraction, accompanied by a robust upregulation of Dkk3, a muscle-enriched secreted protein. Dkk3 inhibits muscle stem cell differentiation and attenuates muscle regeneration in vivo. Conversely, Dkk3 blockade by myofiber-specific Baf60c transgene promotes muscle regeneration and contraction. Baf60c interacts with Six4 to synergistically suppress myocyte Dkk3 expression. While muscle expression and circulation levels of Dkk3 are markedly elevated in obese mice and humans, Dkk3 knockdown improves muscle regeneration in obese mice. This work defines Baf60c in myofiber as a critical regulator of muscle regeneration through Dkk3-mediated paracrine signaling.
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Affiliation(s)
- Jingya Xu
- Department of Pathology and Pathophysiology and Department of Cardiology, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
- Department of Endocrinology and Metabolism, School of Medicine, The Second Affiliated Hospital, Zhejiang University, Hangzhou, China
- Key Laboratory of Disease Proteomics of Zhejiang Province, School of Medicine, Zhejiang University , Hangzhou, China
| | - Xiaofei Li
- Department of Sport Medicine, Xuzhou Medical University Affiliated Hospital of Lianyungang, Lianyungang, China
| | - Wei Chen
- Department of Pathology and Pathophysiology and Department of Cardiology, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
- Key Laboratory of Disease Proteomics of Zhejiang Province, School of Medicine, Zhejiang University , Hangzhou, China
| | - Ziyin Zhang
- Department of Pathology and Pathophysiology and Department of Cardiology, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
- Key Laboratory of Disease Proteomics of Zhejiang Province, School of Medicine, Zhejiang University , Hangzhou, China
| | - Yanping Zhou
- Department of Pathology and Pathophysiology and Department of Cardiology, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
- Key Laboratory of Disease Proteomics of Zhejiang Province, School of Medicine, Zhejiang University , Hangzhou, China
| | - Yahui Gou
- Department of Pathology and Pathophysiology and Department of Cardiology, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
- Zhejiang University-University of Edinburgh Institute (ZJE), Zhejiang University , Haining, China
| | - Cheng-An Lv
- Department of Pathology and Pathophysiology and Department of Cardiology, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
- Key Laboratory of Disease Proteomics of Zhejiang Province, School of Medicine, Zhejiang University , Hangzhou, China
| | - Lu Jin
- Department of Pathology and Pathophysiology and Department of Cardiology, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
- Key Laboratory of Disease Proteomics of Zhejiang Province, School of Medicine, Zhejiang University , Hangzhou, China
| | - Xinyuan Qiu
- Department of Pathology and Pathophysiology and Department of Cardiology, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
| | - Shengshan Ma
- Department of Sport Medicine, Xuzhou Medical University Affiliated Hospital of Lianyungang, Lianyungang, China
| | - Qing-Qian Wu
- Department of Pathology and Pathophysiology and Department of Cardiology, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
- Key Laboratory of Disease Proteomics of Zhejiang Province, School of Medicine, Zhejiang University , Hangzhou, China
| | - Tongyu Liu
- Department of Cell and Developmental Biology, Life Sciences Institute, University of Michigan, Ann Arbor, Ann Arbor, MI, USA
| | - Lin Mi
- Department of Cell and Developmental Biology, Life Sciences Institute, University of Michigan, Ann Arbor, Ann Arbor, MI, USA
| | - Zhuoying Yang
- Department of Pathology and Pathophysiology and Department of Cardiology, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
- Key Laboratory of Disease Proteomics of Zhejiang Province, School of Medicine, Zhejiang University , Hangzhou, China
| | - Ting Yu
- Department of Pathology and Pathophysiology and Department of Cardiology, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
- Key Laboratory of Disease Proteomics of Zhejiang Province, School of Medicine, Zhejiang University , Hangzhou, China
| | - Xiaowen Pan
- Department of Endocrinology and Metabolism, School of Medicine, The Second Affiliated Hospital, Zhejiang University, Hangzhou, China
| | - Yu Feng
- Department of Endocrinology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Pengfei Shan
- Department of Endocrinology and Metabolism, School of Medicine, The Second Affiliated Hospital, Zhejiang University, Hangzhou, China
| | - Zhuo-Xian Meng
- Department of Pathology and Pathophysiology and Department of Cardiology, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
- Key Laboratory of Disease Proteomics of Zhejiang Province, School of Medicine, Zhejiang University , Hangzhou, China
- Department of Geriatrics, Affiliated Hangzhou First People's Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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Han S, Wu Q, Wang M, Yang M, Sun C, Liang J, Guo X, Zhang Z, Xu J, Qiu X, Xie C, Chen S, Gao Y, Meng ZX. An integrative profiling of metabolome and transcriptome in the plasma and skeletal muscle following an exercise intervention in diet-induced obese mice. J Mol Cell Biol 2023; 15:mjad016. [PMID: 36882217 PMCID: PMC10576543 DOI: 10.1093/jmcb/mjad016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 02/02/2023] [Accepted: 03/06/2023] [Indexed: 03/09/2023] Open
Abstract
Exercise intervention at the early stage of type 2 diabetes mellitus (T2DM) can aid in the maintenance of blood glucose homeostasis and prevent the development of macrovascular and microvascular complications. However, the exercise-regulated pathways that prevent the development of T2DM remain largely unclear. In this study, two forms of exercise intervention, treadmill training and voluntary wheel running, were conducted for high-fat diet (HFD)-induced obese mice. We observed that both forms of exercise intervention alleviated HFD-induced insulin resistance and glucose intolerance. Skeletal muscle is recognized as the primary site for postprandial glucose uptake and for responsive alteration beyond exercise training. Metabolomic profiling of the plasma and skeletal muscle in Chow, HFD, and HFD-exercise groups revealed robust alterations in metabolic pathways by exercise intervention in both cases. Overlapping analysis identified nine metabolites, including beta-alanine, leucine, valine, and tryptophan, which were reversed by exercise treatment in both the plasma and skeletal muscle. Transcriptomic analysis of gene expression profiles in the skeletal muscle revealed several key pathways involved in the beneficial effects of exercise on metabolic homeostasis. In addition, integrative transcriptomic and metabolomic analyses uncovered strong correlations between the concentrations of bioactive metabolites and the expression levels of genes involved in energy metabolism, insulin sensitivity, and immune response in the skeletal muscle. This work established two models of exercise intervention in obese mice and provided mechanistic insights into the beneficial effects of exercise intervention on systemic energy homeostasis.
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Affiliation(s)
- Shuang Han
- Department of Pathology and Pathophysiology and Department of Cardiology of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Department of Geriatrics, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China
| | - Qingqian Wu
- Department of Pathology and Pathophysiology and Department of Cardiology of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Key Laboratory of Disease Proteomics of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Mengying Wang
- Department of Big Data in Health Science School of Public Health, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Miqi Yang
- Department of Pathology and Pathophysiology and Department of Cardiology of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Chen Sun
- State Key Laboratory of Natural Medicines and School of Life Science and Technology, China Pharmaceutical University, Nanjing 211198, China
| | - Jiaqi Liang
- State Key Laboratory of Natural Medicines and School of Life Science and Technology, China Pharmaceutical University, Nanjing 211198, China
| | - Xiaozhen Guo
- State Key Laboratory of Drug Research, Shanghai Institute of Material Medical, Chinese Academy of Sciences, Shanghai 201203, China
| | - Zheyu Zhang
- Department of Pathology and Pathophysiology and Department of Cardiology of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Jingya Xu
- Department of Pathology and Pathophysiology and Department of Cardiology of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Xinyuan Qiu
- Department of Biology and Chemistry, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha 410073, China
| | - Cen Xie
- State Key Laboratory of Drug Research, Shanghai Institute of Material Medical, Chinese Academy of Sciences, Shanghai 201203, China
| | - Siyu Chen
- State Key Laboratory of Natural Medicines and School of Life Science and Technology, China Pharmaceutical University, Nanjing 211198, China
| | - Yue Gao
- Department of Geriatrics, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China
| | - Zhuo-Xian Meng
- Department of Pathology and Pathophysiology and Department of Cardiology of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Department of Geriatrics, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China
- Key Laboratory of Disease Proteomics of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou 310058, China
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