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Yang C, Zhu D, Liu C, Wang W, He Y, Wang B, Li M. Lipid metabolic reprogramming mediated by circulating Nrg4 alleviates metabolic dysfunction-associated steatotic liver disease during the early recovery phase after sleeve gastrectomy. BMC Med 2024; 22:164. [PMID: 38632600 PMCID: PMC11025198 DOI: 10.1186/s12916-024-03377-0] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 03/28/2024] [Indexed: 04/19/2024] Open
Abstract
BACKGROUND The metabolic benefits of bariatric surgery that contribute to the alleviation of metabolic dysfunction-associated steatotic liver disease (MASLD) have been reported. However, the processes and mechanisms underlying the contribution of lipid metabolic reprogramming after bariatric surgery to attenuating MASLD remain elusive. METHODS A case-control study was designed to evaluate the impact of three of the most common adipokines (Nrg4, leptin, and adiponectin) on hepatic steatosis in the early recovery phase following sleeve gastrectomy (SG). A series of rodent and cell line experiments were subsequently used to determine the role and mechanism of secreted adipokines following SG in the alleviation of MASLD. RESULTS In morbidly obese patients, an increase in circulating Nrg4 levels is associated with the alleviation of hepatic steatosis in the early recovery phase following SG before remarkable weight loss. The temporal parameters of the mice confirmed that an increase in circulating Nrg4 levels was initially stimulated by SG and contributed to the beneficial effect of SG on hepatic lipid deposition. Moreover, this occurred early following bariatric surgery. Mechanistically, gain- and loss-of-function studies in mice or cell lines revealed that circulating Nrg4 activates ErbB4, which could positively regulate fatty acid oxidation in hepatocytes to reduce intracellular lipid deposition. CONCLUSIONS This study demonstrated that the rapid effect of SG on hepatic lipid metabolic reprogramming mediated by circulating Nrg4 alleviates MASLD.
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Affiliation(s)
- Chengcan Yang
- Department of General Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Dongzi Zhu
- Department of General Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Chaofan Liu
- Department of General Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Wenyue Wang
- Department of General Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Yining He
- Biostatistics Office of Clinical Research Unit, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Bing Wang
- Department of General Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China.
| | - Meiyi Li
- Fudan Zhangjiang Institute, Fudan University, Shanghai, 201203, China.
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Dhamija B, Marathe S, Sawant V, Basu M, Attrish D, Mukherjee D, Kumar S, Pai MGJ, Wad S, Sawant A, Nayak C, Venkatesh KV, Srivastava S, Barthel SR, Purwar R. IL-17A Orchestrates Reactive Oxygen Species/HIF1α-Mediated Metabolic Reprogramming in Psoriasis. J Immunol 2024; 212:302-316. [PMID: 38019129 PMCID: PMC11100423 DOI: 10.4049/jimmunol.2300319] [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] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 10/20/2023] [Indexed: 11/30/2023]
Abstract
Immune cell-derived IL-17A is one of the key pathogenic cytokines in psoriasis, an immunometabolic disorder. Although IL-17A is an established regulator of cutaneous immune cell biology, its functional and metabolic effects on nonimmune cells of the skin, particularly keratinocytes, have not been comprehensively explored. Using multiomics profiling and systems biology-based approaches, we systematically uncover significant roles for IL-17A in the metabolic reprogramming of human primary keratinocytes (HPKs). High-throughput liquid chromatography-tandem mass spectrometry and nuclear magnetic resonance spectroscopy revealed IL-17A-dependent regulation of multiple HPK proteins and metabolites of carbohydrate and lipid metabolism. Systems-level MitoCore modeling using flux-balance analysis identified IL-17A-mediated increases in HPK glycolysis, glutaminolysis, and lipid uptake, which were validated using biochemical cell-based assays and stable isotope-resolved metabolomics. IL-17A treatment triggered downstream mitochondrial reactive oxygen species and HIF1α expression and resultant HPK proliferation, consistent with the observed elevation of these downstream effectors in the epidermis of patients with psoriasis. Pharmacological inhibition of HIF1α or reactive oxygen species reversed IL-17A-mediated glycolysis, glutaminolysis, lipid uptake, and HPK hyperproliferation. These results identify keratinocytes as important target cells of IL-17A and reveal its involvement in multiple downstream metabolic reprogramming pathways in human skin.
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Affiliation(s)
- Bhavuk Dhamija
- Department of Biosciences and Bioengineering, IIT Bombay, Mumbai, India
| | - Soumitra Marathe
- Department of Biosciences and Bioengineering, IIT Bombay, Mumbai, India
| | - Vinanti Sawant
- Department of Biosciences and Bioengineering, IIT Bombay, Mumbai, India
| | - Moumita Basu
- Department of Biosciences and Bioengineering, IIT Bombay, Mumbai, India
| | - Diksha Attrish
- Department of Biosciences and Bioengineering, IIT Bombay, Mumbai, India
| | | | - Sushant Kumar
- Department of Biosciences and Bioengineering, IIT Bombay, Mumbai, India
| | | | - Siddhi Wad
- Department of Biosciences and Bioengineering, IIT Bombay, Mumbai, India
| | - Abhijeet Sawant
- Plastic Surgery Department, TNMC and BYL Nair Charitable Hospital, Mumbai, India
| | - Chitra Nayak
- Skin and Venereal Diseases Department, TNMC and BYL Nair Charitable Hospital, Mumbai, India
| | - KV Venkatesh
- Department of Chemical Engineering, IIT Bombay, Mumbai, India
| | | | - Steven R. Barthel
- Department of Dermatology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Rahul Purwar
- Department of Biosciences and Bioengineering, IIT Bombay, Mumbai, India
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W-M Fan T, Islam JMM, Higashi RM, Lin P, Brainson CF, Lane AN. Metabolic reprogramming driven by EZH2 inhibition depends on cell-matrix interactions. J Biol Chem 2024; 300:105485. [PMID: 37992808 PMCID: PMC10770523 DOI: 10.1016/j.jbc.2023.105485] [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: 05/11/2023] [Revised: 10/25/2023] [Accepted: 11/13/2023] [Indexed: 11/24/2023] Open
Abstract
EZH2 (Enhancer of Zeste Homolog 2), a subunit of Polycomb Repressive Complex 2 (PRC2), catalyzes the trimethylation of histone H3 at lysine 27 (H3K27me3), which represses expression of genes. It also has PRC2-independent functions, including transcriptional coactivation of oncogenes, and is frequently overexpressed in lung cancers. Clinically, EZH2 inhibition can be achieved with the FDA-approved drug EPZ-6438 (tazemetostat). To realize the full potential of EZH2 blockade, it is critical to understand how cell-cell/cell-matrix interactions present in 3D tissue and cell culture systems influences this blockade in terms of growth-related metabolic functions. Here, we show that EZH2 suppression reduced growth of human lung adenocarcinoma A549 cells in 2D cultures but stimulated growth in 3D cultures. To understand the metabolic underpinnings, we employed [13C6]-glucose stable isotope-resolved metabolomics to determine the effect of EZH2 suppression on metabolic networks in 2D versus 3D A549 cultures. The Krebs cycle, neoribogenesis, γ-aminobutyrate metabolism, and salvage synthesis of purine nucleotides were activated by EZH2 suppression in 3D spheroids but not in 2D cells, consistent with the growth effect. Using simultaneous 2H7-glucose + 13C5,15N2-Gln tracers and EPZ-6438 inhibition of H3 trimethylation, we delineated the effects on the Krebs cycle, γ-aminobutyrate metabolism, gluconeogenesis, and purine salvage to be PRC2-dependent. Furthermore, the growth/metabolic effects differed for mouse Matrigel versus self-produced A549 extracellular matrix. Thus, our findings highlight the importance of the presence and nature of extracellular matrix in studying the function of EZH2 and its inhibitors in cancer cells for modeling the in vivo outcomes.
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Affiliation(s)
- Teresa W-M Fan
- Center for Environmental and System Biochemistry, University of Kentucky, Lexington, Kentucky, USA; Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, Kentucky, USA; Markey Cancer Center, University of Kentucky, Lexington, Kentucky, USA.
| | - Jahid M M Islam
- Center for Environmental and System Biochemistry, University of Kentucky, Lexington, Kentucky, USA
| | - Richard M Higashi
- Center for Environmental and System Biochemistry, University of Kentucky, Lexington, Kentucky, USA; Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, Kentucky, USA; Markey Cancer Center, University of Kentucky, Lexington, Kentucky, USA
| | - Penghui Lin
- Center for Environmental and System Biochemistry, University of Kentucky, Lexington, Kentucky, USA; Markey Cancer Center, University of Kentucky, Lexington, Kentucky, USA
| | - Christine F Brainson
- Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, Kentucky, USA; Markey Cancer Center, University of Kentucky, Lexington, Kentucky, USA
| | - Andrew N Lane
- Center for Environmental and System Biochemistry, University of Kentucky, Lexington, Kentucky, USA; Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, Kentucky, USA; Markey Cancer Center, University of Kentucky, Lexington, Kentucky, USA
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Zhao T, Jiang T, Li X, Chang S, Sun Q, Kong F, Kong X, Wei F, He J, Hao J, Xie K. Nuclear GRP78 Promotes Metabolic Reprogramming and Therapeutic Resistance in Pancreatic Ductal Adenocarcinoma. Clin Cancer Res 2023; 29:5183-5195. [PMID: 37819952 DOI: 10.1158/1078-0432.ccr-23-1143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 08/04/2023] [Accepted: 10/06/2023] [Indexed: 10/13/2023]
Abstract
PURPOSE Stromal fibrosis limits nutritional supply and disarrays metabolism in pancreatic cancer (PDA, pancreatic ductal adenocarcinoma). Understanding of the molecular basis underlying metabolic cues would improve PDA management. The current study determined the interaction between glucose-regulated proteins 78 (GRP78) and hypoxia-inducible factor 1α (HIF-1α) and its mechanistic roles underlying PDA response to oxygen and glucose restrains. EXPERIMENTAL DESIGN Gene expression and its association with clinicopathologic characteristics of patients with PDA and mouse models were analyzed using IHC. Protein expression and their regulation were measured by Western blot and immunoprecipitation analyses. Protein interactions were determined using gain- and loss-of-function assays and molecular methods, including chromatin immunoprecipitation, co-immunoprecipitation, and dual luciferase reporter. RESULTS There was concomitant overexpression of both GRP78 and HIF-1α in human and mouse PDA tissues and cells. Glucose deprivation increased the expression of GRP78 and HIF-1α, particularly colocalization in nucleus. Induction of HIF-1α expression by glucose deprivation in PDA cells depended on the expression of and its own interaction with GRP78. Mechanistically, increased expression of both HIF-1α and LDHA under glucose deprivation was caused by the direct binding of GRP78 and HIF-1α protein complexes to the promoters of HIF-1α and LDHA genes and transactivation of their transcriptional activity. CONCLUSIONS Protein complex of GRP78 and HIF-1α directly binds to HIF-1α own promoter and LDHA promoter, enhances the transcription of both HIF-1α and LDHA, whereas glucose deprivation increases GRP78 expression and further enhances HIF-1α and LDHA transcription. Therefore, crosstalk and integration of hypoxia- and hypoglycemia-responsive signaling critically impact PDA metabolic reprogramming and therapeutic resistance.
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Affiliation(s)
- Tiansuo Zhao
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Digestive Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China
| | - Tingting Jiang
- Center for Pancreatic Cancer Research, The South China University of Technology School of Medicine, Guangzhou, China
| | - Xiaojia Li
- Center for Pancreatic Cancer Research, The South China University of Technology School of Medicine, Guangzhou, China
| | - Shaofei Chang
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Digestive Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China
| | - Qihui Sun
- Center for Pancreatic Cancer Research, The South China University of Technology School of Medicine, Guangzhou, China
| | - Fanyang Kong
- Department of Gastroenterology, Changhai Hospital, Shanghai, China
| | - Xiangyu Kong
- Department of Gastroenterology, Changhai Hospital, Shanghai, China
| | - Fang Wei
- Institute of Digestive Diseases, Guangzhou First People's Hospital and The Second Affiliated Hospital, The South China University of Technology School of Medicine, Guangzhou, China
| | - Jie He
- Institute of Digestive Diseases, Guangzhou First People's Hospital and The Second Affiliated Hospital, The South China University of Technology School of Medicine, Guangzhou, China
| | - Jihui Hao
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Digestive Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China
| | - Keping Xie
- Center for Pancreatic Cancer Research, The South China University of Technology School of Medicine, Guangzhou, China
- Institute of Digestive Diseases, Guangzhou First People's Hospital and The Second Affiliated Hospital, The South China University of Technology School of Medicine, Guangzhou, China
- The South China University of Technology Comprehensive Cancer Center, Guangzhou, China
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