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Guo Y, Xu J, Jia Y, Tian Y, Zhang Y, Zhang J, Wang Y, Chen L. Asiaticoside modulates human NK cell functional fate by mediating metabolic flexibility in the tumor microenvironment. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 133:155921. [PMID: 39121533 DOI: 10.1016/j.phymed.2024.155921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 07/04/2024] [Accepted: 07/26/2024] [Indexed: 08/12/2024]
Abstract
BACKGROUND Transforming growth factor-beta (TGF-β), an immunosuppressive cytokine, is often elevated in various tumors and inhibits the immune system's ability to combat tumor cells. Despite promising results from TGF-β inhibitor therapies, their clinical efficacy remains limited. PURPOSE This study aimed to enhance the antitumor capabilities of natural killer (NK) cells in the presence of TGF-β by exploring the potential of asiaticoside, a natural compound with established clinical safety. STUDY DESIGN The effects of asiaticoside on NK cells were investigated to determine its potential to counteract TGF-β-induced immunosuppression and elucidate the underlying mechanisms. METHODS Natural compounds were screened using a Luminex assay to identify those promoting Interferon-γ (IFN-γ) secretion from NK cells. Asiaticoside-pretreated NK cells' cytotoxicity was assessed against K562, OVCAR8, and A2780 cells using organoids from ascites-derived ovarian cancer (OC) cells. In vivo efficacy was evaluated with B16 melanoma lung metastasis and subcutaneous tumor models in C57BL/6 mice, using asiaticoside as a 50 mg/kg injection. The compound's ability to enhance NK cell-driven anti-neoplastic responses was further assessed in an OC murine model. Effects on TGF-β/SMAD pathways and mitochondrial functions were examined through various microscopy and metabolomic techniques. The involvement of the mTOR/DRP1 axis in asiaticoside-mediated restoration of mitochondrial oxidation in NK cells after TGF-β suppression was determined using the mTOR inhibitor rapamycin and the DRP1 inhibitor Mdivi-1. RESULTS Asiaticoside-treated NK cells retained their ability to suppress tumor growth and metastasis despite TGF-β presence. Asiaticoside downregulated TGF-β receptors 1 (TGFBR1) expression, impaired the protein stability of TGFBR1 and TGF-β receptors 2 (TGFBR2), and reduced SMAD2 phosphorylation, preventing SMAD2 translocation from the mitochondria. This preserved mitochondrial respiration and maintained NK cell antitumor activity. CONCLUSION The study concludes that asiaticoside has significant potential as a strategy for "priming" NK cells in cellular immunotherapy. By demonstrating that asiaticoside degrades the TGF-β receptor, leading to reduced phosphorylation of SMAD2 and preventing its mitochondrial translocation, thereby maintaining mitochondrial integrity. Meantime, asiaticoside counteracts TGF-β-induced suppression of mitochondrial oxidative and aerobic respiration through the mTOR/DRP1 pathways. The research uncovers a previously unreported pathway for preserving mitochondrial respiration and NK cell functionality. A detailed mechanistic insight into how asiaticoside functions at the molecular level was explored. Its ability to counteract the immunosuppressive effects of TGF-β makes it a valuable candidate for enhancing the effectiveness of immunotherapies in treating a variety of tumors with elevated TGF-β levels.
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Affiliation(s)
- Yantong Guo
- Cancer Institute, First Hospital of Jilin University, Changchun, 130012, PR China
| | - Jianting Xu
- Cancer Center, First Hospital of Jilin University, Changchun 130012, PR China
| | - Yiyang Jia
- Department of Hepatobiliary-Pancreatic Surgery, China-Japan Union Hospital of Jilin University, Changchun 130021, PR China
| | - Yuan Tian
- School of clinical medicine, Changchun University of Chinese Medicine, Changchun 130117, PR China
| | - Yongfei Zhang
- Cancer Center, First Hospital of Jilin University, Changchun 130012, PR China
| | - Jinjin Zhang
- Obstetrics and Gynecology Center, First Hospital of Jilin University, Changchun 130012, PR China
| | - Yufeng Wang
- Cancer Institute, First Hospital of Jilin University, Changchun, 130012, PR China; International Center of Future Science, Jilin University, Changchun 130012, PR China.
| | - Lichao Chen
- Cancer Institute, First Hospital of Jilin University, Changchun, 130012, PR China.
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Randhawa PK, Rajakumar A, Futuro de Lima IB, Gupta MK. Eugenol attenuates ischemia-mediated oxidative stress in cardiomyocytes via acetylation of histone at H3K27. Free Radic Biol Med 2023; 194:326-336. [PMID: 36526244 PMCID: PMC10074330 DOI: 10.1016/j.freeradbiomed.2022.12.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 12/02/2022] [Accepted: 12/08/2022] [Indexed: 12/15/2022]
Abstract
Despite clinical advances, ischemia-induced cardiac diseases remain an underlying cause of death worldwide. Epigenetic modifications, especially alterations in the acetylation of histone proteins play a pivotal role in counteracting stressful conditions, including ischemia. In our study, we found that histone active mark H3K27ac was significantly reduced and histone repressive mark H3K27me3 was significantly upregulated in the cardiomyocytes exposed to the ischemic condition. Then, we performed a high throughput drug screening assay using rat ventricular cardiomyocytes during the ischemic condition and screened an antioxidant compound library comprising of 84 drugs for H3K27ac by fluorescence microscopy. Our data revealed that most of the phenolic compounds like eugenol, apigenin, resveratrol, bis-demethoxy curcumin, D-gamma-tocopherol, ambroxol, and non-phenolic compounds like l-Ergothioneine, ciclopirox ethanolamine, and Tanshinone IIA have a crucial role in maintaining the cellular H3K27ac histone marks during the ischemic condition. Further, we tested the role of eugenol on cellular protection during ischemia. Our study shows that ischemia significantly reduces cellular viability and increases total reactive oxygen species (ROS), and mitochondrial ROS in the cells. Interestingly, eugenol treatment significantly restores the cellular acetylation at H3K27, decreases cellular ROS, and improves cellular viability. To explore the mechanism of eugenol-medicated inhibition of deacetylation, we performed a RNAseq experiment. Analysis of transcriptome data using IPA indicated that eugenol regulates several cellular functions associated with cardiovascular diseases, and metabolic processes. Further, we found that eugenol regulates the expression of HMGN1, CD151 and Ppp2ca genes during ischemia. Furthermore, we found that eugenol might protect the cells from ischemia through modulation of HMGN1 protein expression, which plays an active role in regulation of histone acetylation and cellular protection during stress. Thus, our study indicated that eugenol can be exploited as an agent to protect the ischemic cells and also could be used to develop a novel drug for treating cardiac disease.
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Affiliation(s)
- Puneet Kaur Randhawa
- Division of Metabolic and Cardiovascular Sciences, Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, 32827, USA
| | - Aishwarya Rajakumar
- Division of Metabolic and Cardiovascular Sciences, Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, 32827, USA
| | - Isabela Beatriz Futuro de Lima
- Division of Metabolic and Cardiovascular Sciences, Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, 32827, USA
| | - Manish K Gupta
- Division of Metabolic and Cardiovascular Sciences, Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, 32827, USA.
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Yin C, Ye Z, Wu J, Huang C, Pan L, Ding H, Zhong L, Guo L, Zou Y, Wang X, Wang Y, Gao P, Jin X, Yan X, Zou Y, Huang R, Gong H. Elevated Wnt2 and Wnt4 activate NF-κB signaling to promote cardiac fibrosis by cooperation of Fzd4/2 and LRP6 following myocardial infarction. EBioMedicine 2021; 74:103745. [PMID: 34911029 PMCID: PMC8669316 DOI: 10.1016/j.ebiom.2021.103745] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 11/25/2021] [Accepted: 11/26/2021] [Indexed: 11/29/2022] Open
Abstract
Background Acute myocardial infarction (AMI)-induced excessive myocardial fibrosis exaggerates cardiac dysfunction. However, serum Wnt2 or Wnt4 level in AMI patients, and the roles in cardiac fibrosis are largely unkown. Methods AMI and non-AMI patients were enrolled to examine serum Wnt2 and Wnt4 levels by ELISA analysis. The AMI patients were followed-up for one year. MI mouse model was built by ligation of left anterior descending branch (LAD). Findings Serum Wnt2 or Wnt4 level was increased in patients with AMI, and the elevated Wnt2 and Wnt4 were correlated to adverse outcome of these patients. Knockdown of Wnt2 and Wnt4 significantly attenuated myocardial remodeling and cardiac dysfunction following experimental MI. In vitro, hypoxia enhanced the secretion and expression of Wnt2 and Wnt4 in neonatal rat cardiac myocytes (NRCMs) or fibroblasts (NRCFs). Mechanistically, the elevated Wnt2 or Wnt4 activated β-catenin /NF-κB signaling to promote pro-fibrotic effects in cultured NRCFs. In addition, Wnt2 or Wnt4 upregulated the expression of these Wnt co-receptors, frizzled (Fzd) 2, Fzd4 and (ow-density lipoprotein receptor-related protein 6 (LRP6). Further analysis revealed that Wnt2 or Wnt4 activated β-catenin /NF-κB by the co-operation of Fzd4 or Fzd2 and LRP6 signaling, respectively. Interpretation Elevated Wnt2 and Wnt4 activate β-catenin/NF-κB signaling to promote cardiac fibrosis by cooperation of Fzd4/2 and LRP6 in fibroblasts, which contributes to adverse outcome of patients with AMI, suggesting that systemic inhibition of Wnt2 and Wnt4 may improve cardiac dysfunction after MI.
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Affiliation(s)
- Chao Yin
- NHC Key Laboratory of Viral Heart Diseases, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China
| | - Zhishuai Ye
- Department of Cardiology, Beijing Friendship Hospital, Capital Medical University, Beijing 100053, China
| | - Jian Wu
- NHC Key Laboratory of Viral Heart Diseases, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China
| | - Chenxing Huang
- NHC Key Laboratory of Viral Heart Diseases, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China
| | - Le Pan
- NHC Key Laboratory of Viral Heart Diseases, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China
| | - Huaiyu Ding
- Department of Cardiology, The First Affiliated Hospital of Dalian Medical University, Dalian 116011, China
| | - Lei Zhong
- Department of Cardiology, The First Affiliated Hospital of Dalian Medical University, Dalian 116011, China
| | - Lei Guo
- Department of Cardiology, The First Affiliated Hospital of Dalian Medical University, Dalian 116011, China
| | - Yan Zou
- NHC Key Laboratory of Viral Heart Diseases, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China
| | - Xiang Wang
- NHC Key Laboratory of Viral Heart Diseases, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China
| | - Ying Wang
- NHC Key Laboratory of Viral Heart Diseases, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China
| | - Pan Gao
- NHC Key Laboratory of Viral Heart Diseases, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China
| | - Xuejuan Jin
- NHC Key Laboratory of Viral Heart Diseases, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China
| | - Xiaoxiang Yan
- Department of Vascular and Cardiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yunzeng Zou
- NHC Key Laboratory of Viral Heart Diseases, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China
| | - Rongchong Huang
- Department of Cardiology, Beijing Friendship Hospital, Capital Medical University, Beijing 100053, China.
| | - Hui Gong
- NHC Key Laboratory of Viral Heart Diseases, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China.
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Huot JR, Thompson B, McMullen C, Marino JS, Arthur ST. GSI Treatment Preserves Protein Synthesis in C2C12 Myotubes. Cells 2021; 10:cells10071786. [PMID: 34359954 PMCID: PMC8307118 DOI: 10.3390/cells10071786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 07/08/2021] [Accepted: 07/13/2021] [Indexed: 11/25/2022] Open
Abstract
It has been demonstrated that inhibiting Notch signaling through γ-secretase inhibitor (GSI) treatment increases myogenesis, AKT/mTOR signaling, and muscle protein synthesis (MPS) in C2C12 myotubes. The purpose of this study was to determine if GSI-mediated effects on myogenesis and MPS are dependent on AKT/mTOR signaling. C2C12 cells were assessed for indices of myotube formation, anabolic signaling, and MPS following GSI treatment in combination with rapamycin and API-1, inhibitors of mTOR and AKT, respectively. GSI treatment increased several indices of myotube fusion and MPS in C2C12 myotubes. GSI-mediated effects on myotube formation and fusion were completely negated by treatment with rapamycin and API-1. Meanwhile, GSI treatment was able to rescue MPS in C2C12 myotubes exposed to rapamycin or rapamycin combined with API-1. Examination of protein expression revealed that GSI treatment was able to rescue pGSK3β Ser9 despite AKT inhibition by API-1. These findings demonstrate that GSI treatment is able to rescue MPS independent of AKT/mTOR signaling, possibly via GSK3β modulation.
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Affiliation(s)
- Joshua R. Huot
- Laboratory of Systems Physiology, Department of Kinesiology, University of North Carolina at Charlotte, Charlotte, NC 28223, USA; (J.R.H.); (B.T.); (C.M.); (J.S.M.)
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Brian Thompson
- Laboratory of Systems Physiology, Department of Kinesiology, University of North Carolina at Charlotte, Charlotte, NC 28223, USA; (J.R.H.); (B.T.); (C.M.); (J.S.M.)
| | - Charlotte McMullen
- Laboratory of Systems Physiology, Department of Kinesiology, University of North Carolina at Charlotte, Charlotte, NC 28223, USA; (J.R.H.); (B.T.); (C.M.); (J.S.M.)
| | - Joseph S. Marino
- Laboratory of Systems Physiology, Department of Kinesiology, University of North Carolina at Charlotte, Charlotte, NC 28223, USA; (J.R.H.); (B.T.); (C.M.); (J.S.M.)
| | - Susan T. Arthur
- Laboratory of Systems Physiology, Department of Kinesiology, University of North Carolina at Charlotte, Charlotte, NC 28223, USA; (J.R.H.); (B.T.); (C.M.); (J.S.M.)
- Correspondence: ; Tel.: +1-(704)-687-0856
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Adornetto A, Gesualdo C, Laganà ML, Trotta MC, Rossi S, Russo R. Autophagy: A Novel Pharmacological Target in Diabetic Retinopathy. Front Pharmacol 2021; 12:695267. [PMID: 34234681 PMCID: PMC8256993 DOI: 10.3389/fphar.2021.695267] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 06/09/2021] [Indexed: 01/18/2023] Open
Abstract
Autophagy is the major catabolic pathway involved in removing and recycling damaged macromolecules and organelles and several evidences suggest that dysfunctions of this pathway contribute to the onset and progression of central and peripheral neurodegenerative diseases. Diabetic retinopathy (DR) is a serious complication of diabetes mellitus representing the main preventable cause of acquired blindness worldwide. DR has traditionally been considered as a microvascular disease, however this concept has evolved and neurodegeneration and neuroinflammation have emerged as important determinants in the pathogenesis and evolution of the retinal pathology. Here we review the role of autophagy in experimental models of DR and explore the potential of this pathway as a target for alternative therapeutic approaches.
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Affiliation(s)
- Annagrazia Adornetto
- Preclinical and Translational Pharmacology, Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Carlo Gesualdo
- Multidisciplinary Department of Medical, Surgical and Dental Sciences, University of Campania “Luigi Vanvitelli”, Naples, Italy
| | - Maria Luisa Laganà
- Preclinical and Translational Pharmacology, Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Maria Consiglia Trotta
- Department of Experimental Medicine, University of Campania “Luigi Vanvitelli”, Naples, Italy
| | - Settimio Rossi
- Multidisciplinary Department of Medical, Surgical and Dental Sciences, University of Campania “Luigi Vanvitelli”, Naples, Italy
| | - Rossella Russo
- Preclinical and Translational Pharmacology, Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
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Garbern JC, Lee RT. Mitochondria and metabolic transitions in cardiomyocytes: lessons from development for stem cell-derived cardiomyocytes. Stem Cell Res Ther 2021; 12:177. [PMID: 33712058 PMCID: PMC7953594 DOI: 10.1186/s13287-021-02252-6] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 02/28/2021] [Indexed: 12/13/2022] Open
Abstract
Current methods to differentiate cardiomyocytes from human pluripotent stem cells (PSCs) inadequately recapitulate complete development and result in PSC-derived cardiomyocytes (PSC-CMs) with an immature or fetal-like phenotype. Embryonic and fetal development are highly dynamic periods during which the developing embryo or fetus is exposed to changing nutrient, oxygen, and hormone levels until birth. It is becoming increasingly apparent that these metabolic changes initiate developmental processes to mature cardiomyocytes. Mitochondria are central to these changes, responding to these metabolic changes and transitioning from small, fragmented mitochondria to large organelles capable of producing enough ATP to support the contractile function of the heart. These changes in mitochondria may not simply be a response to cardiomyocyte maturation; the metabolic signals that occur throughout development may actually be central to the maturation process in cardiomyocytes. Here, we review methods to enhance maturation of PSC-CMs and highlight evidence from development indicating the key roles that mitochondria play during cardiomyocyte maturation. We evaluate metabolic transitions that occur during development and how these affect molecular nutrient sensors, discuss how regulation of nutrient sensing pathways affect mitochondrial dynamics and function, and explore how changes in mitochondrial function can affect metabolite production, the cell cycle, and epigenetics to influence maturation of cardiomyocytes.
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Affiliation(s)
- Jessica C Garbern
- Department of Stem Cell and Regenerative Biology and the Harvard Stem Cell Institute, Harvard University, 7 Divinity Ave, Cambridge, MA, 02138, USA
- Department of Cardiology, Boston Children's Hospital, 300 Longwood Ave, Boston, MA, 02115, USA
| | - Richard T Lee
- Department of Stem Cell and Regenerative Biology and the Harvard Stem Cell Institute, Harvard University, 7 Divinity Ave, Cambridge, MA, 02138, USA.
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, 75 Francis St, Boston, MA, 02115, USA.
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Chen J, Wo D, Ma E, Yan H, Peng J, Zhu W, Fang Y, Ren DN. Deletion of low-density lipoprotein-related receptor 5 inhibits liver Cancer cell proliferation via destabilizing Nucleoporin 37. Cell Commun Signal 2019; 17:174. [PMID: 31881970 PMCID: PMC6935199 DOI: 10.1186/s12964-019-0495-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 12/05/2019] [Indexed: 11/24/2022] Open
Abstract
Background LRP5/6 are co-receptors in Wnt/β-catenin pathway. Recently, we discovered multiple β-catenin independent functions of LRP5/6 in tumor cells and in the diseased heart. Nucleoporin 37 (NUP37) is an important component of the nuclear pore complex (NPC), whose elevated expression is associated with worsened prognosis in liver cancer. Previous studies have shown that NUP37 interacted with YAP and activated YAP/TEAD signaling in liver cancer. Our preliminary findings showed a nuclear location of LRP5. We thus tested the hypothesis that LRP5 may act as a genuine regulator of YAP/TEAD signaling via modulating NUP37 in a β-catenin-independent way. Methods We performed siRNA knockdown of LRP5, LRP6, or β-catenin in liver cancer HepG2 cells to determine the effect on tumor cell proliferation. Protein expressions and interaction between LRP5 and NUP37 were determined using immunoprecipitation and western blot analyses. Results HepG2 cell proliferation was markedly inhibited by knockdown of LRP5 but not LRP6 or β-catenin, suggesting that LRP5 has a specific, β-catenin-independent role in inhibiting HepG2 cell proliferation. Knockdown of NUP37 by siRNA inhibited the proliferation of HepG2 cells, whereas overexpression of NUP37 reversed the decrease in cell proliferation induced by LRP5 knockdown. Immunoprecipitation assays confirmed that LRP5 bound to NUP37. Furthermore, LRP5 overexpression restored NUP37 knockdown-induced downregulation of YAP/TEAD pathway. Conclusions LRP5 deletion attenuates cell proliferation via destabilization of NUP37, in a β-catenin-independent manner. LRP5 therefore acts as a genuine regulator of YAP/TEAD signaling via maintaining the integrity of the NPC, and implicates a therapeutic strategy in targeting LRP5 for inhibiting liver cancer cell proliferation.
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Affiliation(s)
- Jinxiao Chen
- Department of Plastic and Burn Surgery, Ninth People's Hospital, Shanghai Jiaotong University, School of Medicine, 639 Zhi Zao Ju Road, Shanghai, 200011, People's Republic of China
| | - Da Wo
- Department of Plastic and Burn Surgery, Ninth People's Hospital, Shanghai Jiaotong University, School of Medicine, 639 Zhi Zao Ju Road, Shanghai, 200011, People's Republic of China
| | - En Ma
- Clinical and Translational Research Center, Research Institute of Heart Failure Shanghai East Hospital, Key Laboratory of Arrhythmias of Ministry of Education, Tongji University School of Medicine, Shanghai, China
| | - Hongwei Yan
- Clinical and Translational Research Center, Research Institute of Heart Failure Shanghai East Hospital, Key Laboratory of Arrhythmias of Ministry of Education, Tongji University School of Medicine, Shanghai, China
| | - Jun Peng
- Fujian Key Laboratory of Integrative Medicine on Geriatric, Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, 1 Qiuyang Road, Minhou Shangjie, Fuzhou, 350122, Fujian, China
| | - Weidong Zhu
- Clinical and Translational Research Center, Research Institute of Heart Failure Shanghai East Hospital, Key Laboratory of Arrhythmias of Ministry of Education, Tongji University School of Medicine, Shanghai, China
| | - Yong Fang
- Department of Plastic and Burn Surgery, Ninth People's Hospital, Shanghai Jiaotong University, School of Medicine, 639 Zhi Zao Ju Road, Shanghai, 200011, People's Republic of China.
| | - Dan-Ni Ren
- Fujian Key Laboratory of Integrative Medicine on Geriatric, Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, 1 Qiuyang Road, Minhou Shangjie, Fuzhou, 350122, Fujian, China.
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Wang Y, Yin C, Chen Z, Li Y, Zou Y, Wang X, An Y, Wu F, Zhang G, Yang C, Tang H, Zou Y, Gong H. Cardiac-specific LRP6 knockout induces lipid accumulation through Drp1/CPT1b pathway in adult mice. Cell Tissue Res 2019; 380:143-153. [PMID: 31811407 DOI: 10.1007/s00441-019-03126-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 10/21/2019] [Indexed: 01/05/2023]
Abstract
We recently reported low-density lipoprotein receptor-related protein 6 (LRP6) decreased in dilated cardiomyopathy hearts, and cardiac-specific knockout mice displayed lethal heart failure through activation of dynamin-related protein 1 (Drp1). We also observed lipid accumulation in LRP6 deficiency hearts, but the detailed molecular mechanisms are unclear. Here, we detected fatty acids components in LRP6 deficiency hearts and explored the potential molecular mechanisms. Fatty acid analysis by GC-FID/MS revealed cardiac-specific LRP6 knockout induced the higher level of total fatty acids and some medium-long-chain fatty acids (C16:0, C18:1n9 and C18:2n6) than in control hearts. Carnitine palmitoyltransferase 1b (CPT1b), a rate-limiting enzyme of mitochondrial β-oxidation in adult heart, was sharply decreased in LRP6 deficiency hearts, coincident with the activation of Drp1. Drp1 inhibitor greatly improved cardiac dysfunction and attenuated the increase in total fatty acids and fatty acids C16:0, C18:1n9 in LRP6 deficiency hearts. It also greatly inhibited the decrease in the cardiac expression of CPT1b and the transcriptional factors CCCTC-binding factor (CTCF) and c-Myc induced by cardiac-specific LRP6 knockout in mice. C-Myc but not CTCF was identified to regulate CPT1b expression and lipid accumulation in cardiomyocytes in vitro. The present study indicated cardiac-specific LRP6 knockout induced lipid accumulation by Drp1/CPT1b pathway in adult mice, and c-Myc is involved in the process. It suggests that LRP6 regulates fatty acid metabolism in adult heart.
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Affiliation(s)
- Ying Wang
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, 180 Feng Lin Road, Shanghai, 200032, China
| | - Chao Yin
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, 180 Feng Lin Road, Shanghai, 200032, China
| | - Zhidan Chen
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, 180 Feng Lin Road, Shanghai, 200032, China
| | - Yang Li
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, 180 Feng Lin Road, Shanghai, 200032, China
| | - Yan Zou
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, 180 Feng Lin Road, Shanghai, 200032, China
| | - Xiang Wang
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, 180 Feng Lin Road, Shanghai, 200032, China
| | - Yanpeng An
- State Key Laboratory of Genetic Engineering, Zhongshan Hospital and School of Life Sciences, International Centre for Molecular Phenomics, Collaborative Innovation Center for Genetics and Development, Fudan University, Shanghai, 200438, China
| | - Feizhen Wu
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, 180 Feng Lin Road, Shanghai, 200032, China
| | - Guoping Zhang
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, 180 Feng Lin Road, Shanghai, 200032, China
| | - Chunjie Yang
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, 180 Feng Lin Road, Shanghai, 200032, China
| | - Huiru Tang
- State Key Laboratory of Genetic Engineering, Zhongshan Hospital and School of Life Sciences, International Centre for Molecular Phenomics, Collaborative Innovation Center for Genetics and Development, Fudan University, Shanghai, 200438, China
| | - Yunzeng Zou
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, 180 Feng Lin Road, Shanghai, 200032, China.
| | - Hui Gong
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, and Institutes of Biomedical Sciences, Fudan University, 180 Feng Lin Road, Shanghai, 200032, China.
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Wang X, Zou Y, Li Y, Chen Z, Yin C, Wang Y, Zhang L, Wu J, Yang C, Zhang G, Zou Y, Gong H. Lipoprotein receptor-related protein 6 is required to maintain intercalated disk integrity. Genes Cells 2019; 24:789-800. [PMID: 31609038 DOI: 10.1111/gtc.12727] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 09/29/2019] [Accepted: 10/07/2019] [Indexed: 12/12/2022]
Abstract
The intercalated disk (ID), a highly organized adhesion structure connecting neighboring cardiomyocytes, fulfills mechanical and electrical signaling communication to ensure normal heart function. Lipoprotein receptor-related protein 6 (LRP6) is a co-receptor inducing canonical Wnt/β-catenin signaling. It was recently reported that LRP6 deficiency in cardiomyocytes predisposes to arrhythmia independent of Wnt signaling. However, whether LRP6 directly regulates the structure of IDs requires further investigation. The aim of the present study was to explore the role of LRP6 in IDs and the potential underlying mechanisms by inducible cardiac-specific LRP6 knockout mice. The results revealed that LRP6 was predominately expressed in the cell membrane, including the IDs of cardiomyocytes. Tamoxifen-inducible cardiac-specific LRP6 knockout mice displayed overt cardiac dysfunction and disruption of ID structure. Further analysis revealed that cardiac LRP6 deficiency induced the imbalance of ID component proteins, characterized by the sharply decreased expression of connexin 43 (Cx43) and the significantly increased expression of N-cadherin, desmoplakin and γ-catenin in tissue lysates or membrane fraction from the left ventricle. STRING database analysis indicated that β-catenin, but no other ID-associated proteins, interacted with LRP6. Our immunoprecipitation analysis demonstrated that LRP6 strongly interacted with Cx43, N-cadherin and γ-catenin, and weakly interacted with β-catenin, whereas there was no association with desmoplakin. In response to LRP6 deficiency, the recruitment of β- or γ-catenin to N-cadherin was increased, but they displayed little interaction with Cx43. In conclusion, LRP6 is required to maintain the integrity of ID structure and the balance of ID proteins, and the interaction between LRP6 and Cx43, N-cadherin and γ-catenin may be involved in this process.
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Affiliation(s)
- Xiang Wang
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital and Institute of Biomedical Sciences, Fudan University, Shanghai, China
| | - Yan Zou
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital and Institute of Biomedical Sciences, Fudan University, Shanghai, China
| | - Yang Li
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital and Institute of Biomedical Sciences, Fudan University, Shanghai, China
| | - Zhidan Chen
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital and Institute of Biomedical Sciences, Fudan University, Shanghai, China
| | - Chao Yin
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital and Institute of Biomedical Sciences, Fudan University, Shanghai, China
| | - Ying Wang
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital and Institute of Biomedical Sciences, Fudan University, Shanghai, China
| | - Lei Zhang
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital and Institute of Biomedical Sciences, Fudan University, Shanghai, China
| | - Jian Wu
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital and Institute of Biomedical Sciences, Fudan University, Shanghai, China
| | - Chunjie Yang
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital and Institute of Biomedical Sciences, Fudan University, Shanghai, China
| | - Guoping Zhang
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital and Institute of Biomedical Sciences, Fudan University, Shanghai, China
| | - Yunzeng Zou
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital and Institute of Biomedical Sciences, Fudan University, Shanghai, China
| | - Hui Gong
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital and Institute of Biomedical Sciences, Fudan University, Shanghai, China
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