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Wang L, Zhao D, Tang L, Li H, Liu Z, Gao J, Edin ML, Zhang H, Zhang K, Chen J, Zhu X, Wang D, Zeldin DC, Hammock BD, Wang J, Huang H. Soluble epoxide hydrolase deficiency attenuates lipotoxic cardiomyopathy via upregulation of AMPK-mTORC mediated autophagy. J Mol Cell Cardiol 2020; 154:80-91. [PMID: 33378686 DOI: 10.1016/j.yjmcc.2020.12.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 12/13/2020] [Accepted: 12/15/2020] [Indexed: 12/17/2022]
Abstract
Obesity-driven cardiac lipid accumulation can progress to lipotoxic cardiomyopathy. Soluble epoxide hydrolase (sEH) is the major enzyme that metabolizes epoxyeicosatrienoic acids (EETs), which have biological activity of regulating lipid metabolism. The current study explores the unknown role of sEH deficiency in lipotoxic cardiomyopathy and its underlying mechanism. Wild-type and Ephx2 knock out (sEH KO) C57BL/6 J mice were fed with high-fat diet (HFD) for 24 weeks to induce lipotoxic cardiomyopathy animal models. Palmitic acid (PA) was utilized to induce lipotoxicity to cardiomyocytes for in vitro study. We found sEH KO, independent of plasma lipid and blood pressures, significantly attenuated HFD-induced myocardial lipid accumulation and cardiac dysfunction in vivo. HFD-induced lipotoxic cardiomyopathy and dysfunction of adenosine 5'-monophosphate-activated protein kinase-mammalian target of rapamycin complex (AMPK-mTORC) signaling mediated lipid autophagy in heart were restored by sEH KO. In primary neonatal mouse cardiomyocytes, both sEH KO and sEH substrate EETs plus sEH inhibitor AUDA treatments attenuated PA-induced lipid accumulation. These effects were blocked by inhibition of AMPK or autophagy. The outcomes were supported by the results that sEH KO and EETs plus AUDA rescued HFD- and PA-induced impairment of autophagy upstream signaling of AMPK-mTORC, respectively. These findings revealed that sEH deficiency played an important role in attenuating myocardial lipid accumulation and provided new insights into treating lipotoxic cardiomyopathy. Regulation of autophagy via AMPK-mTORC signaling pathway is one of the underlying mechanisms.
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Affiliation(s)
- Luyun Wang
- Guangdong Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Department of Cardiology, RNA Biomedical Institute, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yanjiang Road, Guangzhou 510120, China; Division of Cardiology, Department of Internal Medicine, Hubei Key Laboratory of Genetics and Molecular Mechanism of Cardiological Disorders, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan 430030, China
| | - Daqiang Zhao
- Department of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan 430030, China
| | - Liangqiu Tang
- Department of Cardiology, Yuebei People's Hospital, Medical college of Shantou University, 133 Huimin South Road, Shaoguan 512025, China
| | - Huihui Li
- Division of Cardiology, Department of Internal Medicine, Hubei Key Laboratory of Genetics and Molecular Mechanism of Cardiological Disorders, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan 430030, China
| | - Zhaoyu Liu
- Guangdong Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Department of Cardiology, RNA Biomedical Institute, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yanjiang Road, Guangzhou 510120, China
| | - Jingwei Gao
- Guangdong Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Department of Cardiology, RNA Biomedical Institute, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yanjiang Road, Guangzhou 510120, China
| | - Matthew L Edin
- Division of Intramural Research, NIEHS/NIH, 111 T.W. Alexander Dr., Research Triangle Park, NC 27709, USA
| | - Huanji Zhang
- Department of Cardiology, The Eighth Affiliated Hospital of Sun Yat-sen University, 3025 Shennan Middle Road, Shen Zhen 518033, China
| | - Kun Zhang
- Guangdong Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Department of Cardiology, RNA Biomedical Institute, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yanjiang Road, Guangzhou 510120, China
| | - Jie Chen
- Department of Radiation Oncology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yanjiang Road, Guangzhou 510120, China
| | - Xinhong Zhu
- Department of Neurobiology, School of Basic Medical Science, Southern Medical 26 University, 1023-1063 Shatai South Road, Guangzhou 510515, China
| | - Daowen Wang
- Division of Cardiology, Department of Internal Medicine, Hubei Key Laboratory of Genetics and Molecular Mechanism of Cardiological Disorders, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Ave, Wuhan 430030, China
| | - Darryl C Zeldin
- Division of Intramural Research, NIEHS/NIH, 111 T.W. Alexander Dr., Research Triangle Park, NC 27709, USA
| | - Bruce D Hammock
- Department of Entomology and Nematology, University of California Davis, One Shields Ave., Davis 95616, USA
| | - Jingfeng Wang
- Guangdong Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Department of Cardiology, RNA Biomedical Institute, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yanjiang Road, Guangzhou 510120, China.
| | - Hui Huang
- Guangdong Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Department of Cardiology, RNA Biomedical Institute, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yanjiang Road, Guangzhou 510120, China; Department of Cardiology, The Eighth Affiliated Hospital of Sun Yat-sen University, 3025 Shennan Middle Road, Shen Zhen 518033, China.
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Liao S, Huang H, Zhang F, Lu D, Ye S, Zheng L, Sun Y, Wu Y. Differential expression of epithelial sodium channels in human RCC associated with the prognosis and tumor stage: Evidence from integrate analysis. J Cancer 2020; 11:7348-7356. [PMID: 33193899 PMCID: PMC7646170 DOI: 10.7150/jca.48970] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 10/07/2020] [Indexed: 02/06/2023] Open
Abstract
Background: Epithelial sodium channels are disputed in renal cell carcinoma, but its functions and effects on clinical outcomes are not well understood. Materials and Methods: IHC and PT-PCR were used to detect ENaCα, β, γ, AVPR2, AQP2, and MR expression in the primary tumor and peritumoral tissues. GEPIA online tool was used to analyze the relationship between epithelial sodium channels and clinical-pathological characteristics. Tumor IMmune Estimation Resource online tool was used to investigate the immune profile relevant to epithelial sodium channels expression. Results: Quantitative RT-PCR analysis revealed that ENaCα, β, γ, AQP2, and AVPR2 mRNA were decreased in the RCC, but there was no difference in MR mRNA expression between kidney and RCC (p=0.238). The IHC analyses showed that the intensely positive staining of ENaCα, β, γ, AVPR2, and AQP in the renal tubular and the attenuated in the RCCs. MR displayed moderate staining in both RCC and normal tissue. With the promotion of staging, the expression of AQP2, AVPR2, and MR reduced gradually and predicted a better prognosis. Although ENaCα, β, and γ were unable to associate with staging, we still observed a high expression of ENaCβ and γ displayed a poorer prognosis of RCC. Conclusions: ENaCs shows an oncogene profile in RCC, drugs targeting epithelial sodium channel should be a possible therapeutic way to treat RCC. AVPR2 and MR exhibit an encouraging immunomodulatory function; patients with low expression of AVPR2 and MR may obtain more benefit from immunotherapy.
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Affiliation(s)
- Shangfan Liao
- Department of Urology, Affiliated Sanming First Hospital, Fujian Medical University, Sanming365100, Fujian, PR. China
| | - Huaibin Huang
- Department of Urology, Affiliated Sanming First Hospital, Fujian Medical University, Sanming365100, Fujian, PR. China
| | - Fabiao Zhang
- Department of Urology, Affiliated Sanming First Hospital, Fujian Medical University, Sanming365100, Fujian, PR. China
| | - Dongming Lu
- Department of Urology, Affiliated Sanming First Hospital, Fujian Medical University, Sanming365100, Fujian, PR. China
| | - Shuchao Ye
- Department of Urology, Affiliated Sanming First Hospital, Fujian Medical University, Sanming365100, Fujian, PR. China
| | - Luoping Zheng
- Department of Urology, Affiliated Sanming First Hospital, Fujian Medical University, Sanming365100, Fujian, PR. China
| | - Yingming Sun
- Department of Medical and Radiation Oncology, Affiliated Sanming First Hospital, Fujian Medical University, Sanming365100, Fujian, PR. China
| | - Yongyang Wu
- Department of Urology, Affiliated Sanming First Hospital, Fujian Medical University, Sanming365100, Fujian, PR. China
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Ernandez T, Udwan K, Chassot A, Martin PY, Feraille E. Uninephrectomy and apical fluid shear stress decrease ENaC abundance in collecting duct principal cells. Am J Physiol Renal Physiol 2017; 314:F763-F772. [PMID: 28877879 DOI: 10.1152/ajprenal.00200.2017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Acute nephron reduction such as after living kidney donation may increase the risk of hypertension. Uninephrectomy induces major hemodynamic changes in the remaining kidney, resulting in rapid increase of single-nephron glomerular filtration rate (GFR) and fluid delivery in the distal nephron. Decreased sodium (Na) fractional reabsorption after the distal tubule has been reported after uninephrectomy in animals preserving volume homeostasis. In the present study, we thought to specifically explore the effect of unilateral nephrectomy on epithelial Na channel (ENaC) subunit expression in mice. We show that γ-ENaC subunit surface expression was specifically downregulated after uninephrectomy, whereas the expression of the aldosterone-sensitive α-ENaC and α1-Na-K-ATPase subunits as well as of kidney-specific Na-K-Cl cotransporter isoform and Na-Cl cotransporter were not significantly altered. Because acute nephron reduction induces a rapid increase of single-nephron GFR, resulting in a higher tubular fluid flow, we speculated that local mechanical factors such as fluid shear stress (FSS) were involved in Na reabsorption regulation after uninephrectomy. We further explore such hypothesis in an in vitro model of FSS applied on highly differentiated collecting duct principal cells. We found that FSS specifically downregulates β-ENaC and γ-ENaC subunits at the transcriptional level through an unidentified heat-insensitive paracrine basolateral factor. The primary cilium as a potential mechanosensor was not required. In contrast, protein kinase A and calcium-sensitive cytosolic phospholipase A2 were involved, but we could not demonstrate a role for cyclooxygenase or epoxygenase metabolites.
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Affiliation(s)
- T Ernandez
- Service of Nephrology, University Hospital of Geneva , Geneva , Switzerland.,Department of Cell Physiology and Metabolism, University Medical Center , Geneva , Switzerland
| | - K Udwan
- Department of Cell Physiology and Metabolism, University Medical Center , Geneva , Switzerland
| | - A Chassot
- Department of Cell Physiology and Metabolism, University Medical Center , Geneva , Switzerland
| | - P-Y Martin
- Service of Nephrology, University Hospital of Geneva , Geneva , Switzerland
| | - E Feraille
- Department of Cell Physiology and Metabolism, University Medical Center , Geneva , Switzerland
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Liu C, Zhu LL, Xu SG, Ji HL, Li XM. ENaC/DEG in Tumor Development and Progression. J Cancer 2016; 7:1888-1891. [PMID: 27698929 PMCID: PMC5039373 DOI: 10.7150/jca.15693] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 06/29/2016] [Indexed: 11/05/2022] Open
Abstract
The epithelial Na+ channel/degenerin (ENaC/DEG) superfamily, including the acid-sensing ion channels (ASICs), is characterized by a high degree of similarity in structure but highly diverse in physiological functions. These ion channels have been shown to be important in several physiological functions of normal epithelial cells, including salt homeostasis, fluid transportation and cell mobility. There is increasing evidence suggesting that ENaC/DEG channels are critically engaged in cancer cell biology, such as proliferation, migration, invasion and apoptosis, playing a role in tumor development and progression. In this review, we will discuss recent studies showing the role of ENaC and ASIC channels in epithelial cells and its relationship to the oncogenesis.
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Affiliation(s)
- Cui Liu
- School of Nursing, Xinxiang Medical University, Xinxiang 453003, Henan Province, P. R. China
| | - Li-Li Zhu
- School of Nursing, Xinxiang Medical University, Xinxiang 453003, Henan Province, P. R. China
| | - Si-Guang Xu
- Institute of Lung and Molecular Therapy, Xinxiang Medical University, Xinxiang 453003, Henan Province, P. R. China
| | - Hong-Long Ji
- Institute of Lung and Molecular Therapy, Xinxiang Medical University, Xinxiang 453003, Henan Province, P. R. China
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, Tyler, Texas, USA
- Texas Lung Injury Institute, University of Texas Health Science Center at Tyler, Tyler, Texas, USA
| | - Xiu-Min Li
- Center for Cancer Research, Xinxiang Medical University, Xinxiang 453003, Henan Province, P. R. China
- Department Gastroenterology, the Third Affiliated Hospital of Xinxiang Medical University, Henan Province, P. R. China
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Potential Roles of Amiloride-Sensitive Sodium Channels in Cancer Development. BIOMED RESEARCH INTERNATIONAL 2016; 2016:2190216. [PMID: 27403419 PMCID: PMC4926023 DOI: 10.1155/2016/2190216] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 04/18/2016] [Accepted: 05/23/2016] [Indexed: 12/15/2022]
Abstract
The ENaC/degenerin ion channel superfamily includes the amiloride-sensitive epithelial sodium channel (ENaC) and acid sensitive ionic channel (ASIC). ENaC is a multimeric ion channel formed by heteromultimeric membrane glycoproteins, which participate in a multitude of biological processes by mediating the transport of sodium (Na+) across epithelial tissues such as the kidney, lungs, bladder, and gut. Aberrant ENaC functions contribute to several human disease states including pseudohypoaldosteronism, Liddle syndrome, cystic fibrosis, and salt-sensitive hypertension. Increasing evidence suggests that ion channels not only regulate ion homeostasis and electric signaling in excitable cells but also play important roles in cancer cell behaviors such as proliferation, apoptosis, invasion, and migration. Indeed, ENaCs/ASICs had been reported to be associated with cancer characteristics. Given their cell surface localization and pharmacology, pharmacological strategies to target ENaC/ASIC family members may be promising cancer therapeutics.
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