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Zhuang Y, Liu W, Chen F, Xie M, Zhang H, Huang Z, Zhang X, Liu J, Ma K, Feng H, Ruan S, He J, Zhang W, Zou F, Kang X, Fan Y, Zhang G, Chen Z. Nitric oxide-induced lipophagic defects contribute to testosterone deficiency in rats with spinal cord injury. Front Endocrinol (Lausanne) 2024; 15:1360499. [PMID: 38455652 PMCID: PMC10918589 DOI: 10.3389/fendo.2024.1360499] [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: 12/23/2023] [Accepted: 01/30/2024] [Indexed: 03/09/2024] Open
Abstract
Introduction Males with acute spinal cord injury (SCI) frequently exhibit testosterone deficiency and reproductive dysfunction. While such incidence rates are high in chronic patients, the underlying mechanisms remain elusive. Methods and results Herein, we generated a rat SCI model, which recapitulated complications in human males, including low testosterone levels and spermatogenic disorders. Proteomics analyses showed that the differentially expressed proteins were mostly enriched in lipid metabolism and steroid metabolism and biosynthesis. In SCI rats, we observed that testicular nitric oxide (NO) levels were elevated and lipid droplet-autophagosome co-localization in testicular interstitial cells was decreased. We hypothesized that NO impaired lipophagy in Leydig cells (LCs) to disrupt testosterone biosynthesis and spermatogenesis. As postulated, exogenous NO donor (S-nitroso-N-acetylpenicillamine (SNAP)) treatment markedly raised NO levels and disturbed lipophagy via the AMPK/mTOR/ULK1 pathway, and ultimately impaired testosterone production in mouse LCs. However, such alterations were not fully observed when cells were treated with an endogenous NO donor (L-arginine), suggesting that mouse LCs were devoid of an endogenous NO-production system. Alternatively, activated (M1) macrophages were predominant NO sources, as inducible NO synthase inhibition attenuated lipophagic defects and testosterone insufficiency in LCs in a macrophage-LC co-culture system. In scavenging NO (2-4-carboxyphenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (CPTIO)) we effectively restored lipophagy and testosterone levels both in vitro and in vivo, and importantly, spermatogenesis in vivo. Autophagy activation by LYN-1604 also promoted lipid degradation and testosterone synthesis. Discussion In summary, we showed that NO-disrupted-lipophagy caused testosterone deficiency following SCI, and NO clearance or autophagy activation could be effective in preventing reproductive dysfunction in males with SCI.
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Affiliation(s)
- Yuge Zhuang
- Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
| | - Wenyuan Liu
- Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
| | - Feilong Chen
- Department of Pathology, Panyu Maternal and Child Care Service Centre of Guangzhou, Guangzhou, Guangdong, China
| | - Minyu Xie
- Department of Obstetrics and Gynecology, Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Hanbin Zhang
- Department of Obstetrics and Gynecology, Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Zicong Huang
- Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
| | - Xiaoyuan Zhang
- Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
| | - Jinsheng Liu
- Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
| | - Ke Ma
- Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
| | - Hongrui Feng
- Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
| | - Shipeng Ruan
- Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
| | - Jing He
- Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
| | - Wansong Zhang
- Department of Urology, The Seventh Affiliated Hospital, Southern Medical University, Foshan, Guangdong, China
| | - Feng Zou
- Department of Urology, The Seventh Affiliated Hospital, Southern Medical University, Foshan, Guangdong, China
| | - Xiangjin Kang
- Department of Obstetrics and Gynecology, Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Yong Fan
- Department of Obstetrics and Gynecology, Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Guofei Zhang
- Department of Urology, The Seventh Affiliated Hospital, Southern Medical University, Foshan, Guangdong, China
| | - Zhenguo Chen
- Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
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Abstract
The B cell lymphoma 2-associated anthanogene (BAG3) is an anti-apoptotic co-chaperone protein. Previous reports suggest that mutations in BAG3 are associated with dilated cardiomyopathy. This review aims to summarize the current understanding of the relationship between BAG3 mutations and dilated cardiomyopathy, primarily focusing on the role and protective mechanism of BAG3 in cardiomyocytes from individuals with dilated cardiomyopathy. The results of published studies show that BAG3 is critically important for reducing cardiomyocyte apoptosis, maintaining protein homeostasis, regulating mitochondrial stability, modulating myocardial contraction, and reducing cardiac arrhythmia, which suggests an indispensable protective mechanism of BAG3 in dilated cardiomyopathy. The significant role of BAG3 in protecting cardiomyocytes provides a new direction for the diagnosis and treatment of dilated cardiomyopathy. However, further research is required to explore the molecular mechanisms that regulate BAG3 expression, to identify a novel therapy for patients with dilated cardiomyopathy.
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Hundahl LA, Tfelt-Hansen J, Jespersen T. Rat Models of Ventricular Fibrillation Following Acute Myocardial Infarction. J Cardiovasc Pharmacol Ther 2017; 22:514-528. [PMID: 28381093 DOI: 10.1177/1074248417702894] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A number of animal models have been designed in order to unravel the underlying mechanisms of acute ischemia-induced arrhythmias and to test compounds and interventions for antiarrhythmic therapy. This is important as acute myocardial infarction (AMI) continues to be the major cause of sudden cardiac death, and we are yet to discover safe and effective treatments of the lethal arrhythmias occurring in the acute setting. Animal models therefore continue to be relevant for our understanding and treatment of acute ischemic arrhythmias. This review discusses the applicability of the rat as a model for ventricular arrhythmias occurring during the acute phase of AMI. It provides a description of models developed, advantages and disadvantages of rats, as well as an overview of the most important interventions investigated and the relevance for human pathophysiology.
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Affiliation(s)
- Laura A Hundahl
- 1 Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jacob Tfelt-Hansen
- 2 Department of Cardiology, Heart Centre, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Thomas Jespersen
- 1 Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Perdicaro DJ, Rodriguez Lanzi C, Fontana AR, Antoniolli A, Piccoli P, Miatello RM, Diez ER, Vazquez Prieto MA. Grape pomace reduced reperfusion arrhythmias in rats with a high-fat-fructose diet. Food Funct 2017; 8:3501-3509. [DOI: 10.1039/c7fo01062a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Metabolic syndrome (MetS) is a risk factor of sudden cardiac death. GP containing bioactive compounds prevents/attenuates MetS-associated cardiovascular pathologies.
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Affiliation(s)
- Diahann J. Perdicaro
- Area de Fisiopatología
- Facultad de Ciencias Médicas
- Universidad Nacional de Cuyo e Instituto de Medicina y Biología Experimental de Cuyo (IMBECU)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
- Mendoza
- Argentina
| | - Cecilia Rodriguez Lanzi
- Area de Fisiopatología
- Facultad de Ciencias Médicas
- Universidad Nacional de Cuyo e Instituto de Medicina y Biología Experimental de Cuyo (IMBECU)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
- Mendoza
- Argentina
| | - Ariel R. Fontana
- Laboratorio de Bioquímica Vegetal
- Instituto de Biología Agrícola de Mendoza (IBAM)
- CONICET y Facultad de Ciencias Agrarias
- Universidad Nacional de Cuyo
- Mendoza
| | - Andrea Antoniolli
- Laboratorio de Bioquímica Vegetal
- Instituto de Biología Agrícola de Mendoza (IBAM)
- CONICET y Facultad de Ciencias Agrarias
- Universidad Nacional de Cuyo
- Mendoza
| | - Patricia Piccoli
- Laboratorio de Bioquímica Vegetal
- Instituto de Biología Agrícola de Mendoza (IBAM)
- CONICET y Facultad de Ciencias Agrarias
- Universidad Nacional de Cuyo
- Mendoza
| | - Roberto M. Miatello
- Area de Fisiopatología
- Facultad de Ciencias Médicas
- Universidad Nacional de Cuyo e Instituto de Medicina y Biología Experimental de Cuyo (IMBECU)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
- Mendoza
- Argentina
| | - Emiliano R. Diez
- Area de Fisiopatología
- Facultad de Ciencias Médicas
- Universidad Nacional de Cuyo e Instituto de Medicina y Biología Experimental de Cuyo (IMBECU)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
- Mendoza
- Argentina
| | - Marcela A. Vazquez Prieto
- Area de Fisiopatología
- Facultad de Ciencias Médicas
- Universidad Nacional de Cuyo e Instituto de Medicina y Biología Experimental de Cuyo (IMBECU)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
- Mendoza
- Argentina
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Pongkan W, Pintana H, Jaiwongkam T, Kredphoo S, Sivasinprasasn S, Chattipakorn SC, Chattipakorn N. Vildagliptin reduces cardiac ischemic-reperfusion injury in obese orchiectomized rats. J Endocrinol 2016; 231:81-95. [PMID: 27543302 DOI: 10.1530/joe-16-0232] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 08/19/2016] [Indexed: 12/13/2022]
Abstract
Obesity and testosterone deprivation are associated with coronary artery disease. Testosterone and vildagliptin (dipeptidyl peptidase-4 inhibitors) exert cardioprotection during ischemic-reperfusion (I/R) injury. However, the effect of these drugs on I/R heart in a testosterone-deprived, obese, insulin-resistant model is unclear. This study investigated the effects of testosterone and vildagliptin on cardiac function, arrhythmias and the infarct size in I/R heart of testosterone-deprived rats with obese insulin resistance. Orchiectomized (O) or sham operated (S) male Wistar rats were divided into 2 groups to receive normal diet (ND) or high-fat diet (HFD) for 12 weeks. Orchiectomized rats in each diet were divided to receive testosterone (2 mg/kg), vildagliptin (3 mg/kg) or the vehicle daily for 4 weeks. Then, I/R was performed by a 30-min left anterior descending coronary artery ligation, followed by a 120-min reperfusion. LV function, arrhythmia scores, infarct size and cardiac mitochondrial function were determined. HFD groups developed insulin resistance at week 12. At week 16, cardiac function was impaired in NDO, HFO and HFS rats, but was restored in all testosterone- and vildagliptin-treated rats. During I/R injury, arrhythmia scores, infarct size and cardiac mitochondrial dysfunction were prominently increased in NDO, HFO and HFS rats, compared with those in NDS rats. Treatment with either testosterone or vildagliptin similarly attenuated these impairments during I/R injury. These finding suggest that both testosterone replacement and vildagliptin share similar efficacy for cardioprotection during I/R injury by decreasing the infarct size and attenuating cardiac mitochondrial dysfunction caused by I/R injury in testosterone-deprived rats with obese insulin resistance.
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Affiliation(s)
- Wanpitak Pongkan
- Cardiac Electrophysiology Research and Training CenterFaculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Cardiac Electrophysiology UnitDepartment of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Center of Excellence in Cardiac Electrophysiology ResearchChiang Mai University, Chiang Mai, Thailand
| | - Hiranya Pintana
- Cardiac Electrophysiology Research and Training CenterFaculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Cardiac Electrophysiology UnitDepartment of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Thidarat Jaiwongkam
- Cardiac Electrophysiology Research and Training CenterFaculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Cardiac Electrophysiology UnitDepartment of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Center of Excellence in Cardiac Electrophysiology ResearchChiang Mai University, Chiang Mai, Thailand
| | - Sasiwan Kredphoo
- Cardiac Electrophysiology Research and Training CenterFaculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Cardiac Electrophysiology UnitDepartment of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Center of Excellence in Cardiac Electrophysiology ResearchChiang Mai University, Chiang Mai, Thailand
| | - Sivaporn Sivasinprasasn
- Cardiac Electrophysiology Research and Training CenterFaculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Cardiac Electrophysiology UnitDepartment of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Center of Excellence in Cardiac Electrophysiology ResearchChiang Mai University, Chiang Mai, Thailand
| | - Siriporn C Chattipakorn
- Cardiac Electrophysiology Research and Training CenterFaculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Cardiac Electrophysiology UnitDepartment of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Department of Oral Biology and Diagnostic ScienceFaculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Nipon Chattipakorn
- Cardiac Electrophysiology Research and Training CenterFaculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Cardiac Electrophysiology UnitDepartment of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Center of Excellence in Cardiac Electrophysiology ResearchChiang Mai University, Chiang Mai, Thailand
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