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Mohammed Abdul KS, Han K, Guerrero AB, Wilson CN, Kulkarni A, Purcell NH. Increased PHLPP1 expression through ERK-4E-BP1 signaling axis drives nicotine induced oxidative stress related damage of cardiomyocytes. J Mol Cell Cardiol 2024; 193:100-112. [PMID: 38851627 DOI: 10.1016/j.yjmcc.2024.05.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 05/30/2024] [Accepted: 05/31/2024] [Indexed: 06/10/2024]
Abstract
Nicotine, a key constituent of tobacco/electronic cigarettes causes cardiovascular injury and mortality. Nicotine is known to induce oxidative stress and mitochondrial dysfunction in cardiomyocytes leading to cell death. However, the underlying mechanisms remain unclear. Pleckstrin homology domain leucine-rich repeat protein phosphatase (PHLPP) is a member of metal-dependent protein phosphatase (PPM) family and is known to dephosphorylate several AGC family kinases and thereby regulate a diverse set of cellular functions including cell growth, survival, and death. Our lab has previously demonstrated that PHLPP1 removal reduced cardiomyocyte death and cardiac dysfunction following injury. Here, we present a novel finding that nicotine exposure significantly increased PHLPP1 protein expression in the adolescent rodent heart. Building upon our in vivo finding, we determined the mechanism of PHLPP1 expression in cardiomyocytes. Nicotine significantly increased PHLPP1 protein expression without altering PHLPP2 in cardiomyocytes. In cardiomyocytes, nicotine significantly increased NADPH oxidase 4 (NOX4), which coincided with increased reactive oxygen species (ROS) and increased cardiomyocyte apoptosis which were dependent on PHLPP1 expression. PHLPP1 expression was both necessary and sufficient for nicotine induced mitochondrial dysfunction. Mechanistically, nicotine activated extracellular signal-regulated protein kinases (ERK1/2) and subsequent eukaryotic translation initiation factor 4E-binding protein 1 (4E-BP1) to increase PHLPP1 protein expression. Inhibition of protein synthesis with cycloheximide (CHX) and 4EGI-1 abolished nicotine induced PHLPP1 protein expression. Moreover, inhibition of ERK1/2 activity by U0126 significantly blocked nicotine induced PHLPP1 expression. Overall, this study reveals a novel mechanism by which nicotine regulates PHLPP1 expression through ERK-4E-BP1 signaling axis to drive cardiomyocyte injury.
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Affiliation(s)
| | - Kimin Han
- Cardiovascular Signaling Division, Huntington Medical Research Institutes, Pasadena, California, USA
| | - Alyssa B Guerrero
- Cardiovascular Signaling Division, Huntington Medical Research Institutes, Pasadena, California, USA
| | - Cekia N Wilson
- Cardiovascular Signaling Division, Huntington Medical Research Institutes, Pasadena, California, USA
| | - Amogh Kulkarni
- Cardiovascular Signaling Division, Huntington Medical Research Institutes, Pasadena, California, USA
| | - Nicole H Purcell
- Cardiovascular Signaling Division, Huntington Medical Research Institutes, Pasadena, California, USA; Cardiovascular Division, Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, USA.
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2
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Wu Y, Zou Y, Song C, Cao K, Cai K, Chen S, Zhang Z, Geng D, Zhang N, Feng H, Tang M, Li Z, Sun G, Zhang Y, Sun Y, Zhang Y. The role of serine/threonine protein kinases in cardiovascular disease and potential therapeutic methods. Biomed Pharmacother 2024; 177:117093. [PMID: 38971012 DOI: 10.1016/j.biopha.2024.117093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 07/02/2024] [Accepted: 07/02/2024] [Indexed: 07/08/2024] Open
Abstract
Protein phosphorylation is an important link in a variety of signaling pathways, and most of the important life processes in cells involve protein phosphorylation. Based on the amino acid residues of phosphorylated proteins, protein kinases can be categorized into the following families: serine/threonine protein kinases, tyrosine-specific protein kinases, histidine-specific protein kinases, tryptophan kinases, and aspartate/glutamyl protein kinases. Of all the protein kinases, most are serine/threonine kinases, where serine/threonine protein kinases are protein kinases that catalyze the phosphorylation of serine or threonine residues on target proteins using ATP as a phosphate donor. The current socially accepted classification of serine/threonine kinases is to divide them into seven major groups: protein kinase A, G, C (AGC), CMGC, Calmodulin-dependent protein kinase (CAMK), Casein kinase (CK1), STE, Tyrosine kinase (TKL) and others. After decades of research, a preliminary understanding of the specific classification and respective functions of serine/threonine kinases has entered a new period of exploration. In this paper, we review the literature of the previous years and introduce the specific signaling pathways and related therapeutic modalities played by each of the small protein kinases in the serine/threonine protein kinase family, respectively, in some common cardiovascular system diseases such as heart failure, myocardial infarction, ischemia-reperfusion injury, and diabetic cardiomyopathy. To a certain extent, the current research results, including molecular mechanisms and therapeutic methods, are fully summarized and a systematic report is made for the prevention and treatment of cardiovascular diseases in the future.
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Affiliation(s)
- Yanjiao Wu
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, People's Republic of China
| | - Yuanming Zou
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, People's Republic of China
| | - Chunyu Song
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, People's Republic of China
| | - Kexin Cao
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, People's Republic of China
| | - Kexin Cai
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, People's Republic of China
| | - Shuxian Chen
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, People's Republic of China
| | - Zhaobo Zhang
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, People's Republic of China
| | - Danxi Geng
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, People's Republic of China
| | - Naijin Zhang
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, People's Republic of China; Institute of health sciences, China Medical University, 77 Puhe Road, Shenbei New District, Shenyang, Liaoning Province 110001, People's Republic of China; Key Laboratory of Reproductive and Genetic Medicine (China Medical University), National Health Commission, Shenyang 110004, China.
| | - Hao Feng
- Department of Ophthalmology, The First Affiliated Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, People's Republic of China.
| | - Man Tang
- Department of clinical pharmacology, College of Pharmacy, China Medical University, 77 Puhe Road, Shenbei New District, Shenyang, Liaoning Province 110001, People's Republic of China.
| | - Zhao Li
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, People's Republic of China.
| | - Guozhe Sun
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, People's Republic of China.
| | - Yixiao Zhang
- Department of Urology Surgery, Shengjing Hospital of China Medical University, 36 Sanhao Street, Heping District, Shenyang, Liaoning Province 110004, People's Republic of China.
| | - Yingxian Sun
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, People's Republic of China; Institute of health sciences, China Medical University, 77 Puhe Road, Shenbei New District, Shenyang, Liaoning Province 110001, People's Republic of China; Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, 77 Puhe Road, Shenbei New District, Shenyang, Liaoning Province 110001, People's Republic of China.
| | - Ying Zhang
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, People's Republic of China; Institute of health sciences, China Medical University, 77 Puhe Road, Shenbei New District, Shenyang, Liaoning Province 110001, People's Republic of China.
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3
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Chen L, Qi E, Liu X, Cui L, Fan X, Wei T, Hu Y. The lack of homology domain and leucine rich repeat protein phosphatase 2 ameliorates visual impairment in rats with diabetic retinopathy through regulation of the AKT-GSK-3β-Nrf2 signal cascade. Toxicol Appl Pharmacol 2024; 482:116766. [PMID: 37995808 DOI: 10.1016/j.taap.2023.116766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 10/29/2023] [Accepted: 11/17/2023] [Indexed: 11/25/2023]
Abstract
Pleckstrin homology domain and leucine rich repeat protein phosphatase 2 (PHLPP2) is an emerging player in diverse disorders. Our previous findings have documented that reducing PHLPP2 levels in cultured retinal ganglion cells protects against cellular damage caused by high glucose, indicating a possible link between PHLPP2 and diabetic retinopathy (DR). The present work was dedicated to the investigation of PHLPP2 in DR through in vivo experiments with rat models induced by intraperitoneal injection of streptozotocin. Compared to normal rats, the retinas of rats with DR exhibited a notable increase in the level of PHLPP2. The reduction of PHLPP2 levels in the retina was achieved by the intravitreal administration of adeno-associated viruses expressing specific shRNA targeting PHLPP2. Decreasing the expression of PHLPP2 ameliorated visual function impairment and improved the pathological changes of retina in DR rats. Moreover, decreasing the expression of PHLPP2 repressed the apoptosis, oxidative stress and proinflammatory response in the retinas of rats with DR. Reduction of PHLPP2 levels led to an increase in the levels of phosphorylated AKT and glycogen synthase kinase-3β (GSK-3β). Decreasing the expression of PHLPP2 resulted in increased activation of nuclear factor erythroid 2-related factor 2 (Nrf2), which was reversed by suppressing AKT. Notably, the protective effect of reducing PHLPP2 on DR was eliminated when Nrf2 was restrained. These observations show that the down-regulation of PHLPP2 has protective effects on DR by preserving the structure and function of the retina by regulating the AKT-GSK-3β-Nrf2 signal cascade. Therefore, targeting PHLPP2 may hold promise in the treatment of DR.
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Affiliation(s)
- Li Chen
- Department of Ophthalmology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
| | - En Qi
- Department of Ophthalmology, Qinghai Provincial People's Hospital, Xining 810007, Qinghai, China
| | - Xuan Liu
- Department of Ophthalmology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China.
| | - Lijun Cui
- Department of Ophthalmology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
| | - Xiaojuan Fan
- Department of Ophthalmology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
| | - Ting Wei
- Department of Ophthalmology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
| | - Yaguang Hu
- Department of Ophthalmology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
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Tang J, Yan B, Tang Y, Zhou X, Ji Z, Xu F. Baicalein ameliorates oxidative stress and brain injury after intracerebral hemorrhage by activating the Nrf2/ARE pathway via miR-106a-5p/PHLPP2 axis. Int J Neurosci 2023; 133:1380-1393. [PMID: 35612366 DOI: 10.1080/00207454.2022.2080676] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 05/12/2022] [Indexed: 12/14/2022]
Abstract
Intracerebral hemorrhage (ICH) is a devastating stroke subtype. Baicalein (BAI) has been reported to be effective in ischemic stroke. The aim of the present study was to investigate the mechanism of BAI on brain injury after ICH. Firstly, ICH mouse models were established by injecting collagenase into the right of basal ganglia, followed by detection of neurobehavioral scores, brain edema, oxidative stress (OS) level, neuronal apoptosis and pathological changes. Average neurologic scores, brain water content, and blood-brain barrier permeability and MDA level in ICH mice were reduced after BAI treatment, while serum SOD and GSH-Px levels were increased and neuronal apoptosis and pathological injury of the brain tissues were mitigated. miR-106a-5p downregulation averted the effect of BAI on ICH mice. miR-106a-5p targeted PHLPP2 and PHLPP2 overexpression reversed the effect of BAI on ICH mice. BAI activated the Nrf2/ARE pathway by inhibiting PHLPP2 expression. In conclusion, BAI inhibited OS and protected against brain injury after ICH by activating the Nrf2/ARE pathway through the miR-106a-5p/PHLPP2 axis.
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Affiliation(s)
- Jilei Tang
- Department of Neurosurgery, The First People'Hospital of Xuzhou, Xuzhou, Jiangsu, China
| | - Bingchao Yan
- Department of Neurosurgery, The First People'Hospital of Xuzhou, Xuzhou, Jiangsu, China
| | - Yangyang Tang
- Department of Nursing Basic Medicine Teaching and Research Section, Jiangsu Provincial Xuzhou Pharmaceutical Vocational College, Xuzhou, Jiangsu, China
| | - Xin Zhou
- Xuzhou College of Industrial Technolog, Xuzhou, Jiangsu, China
| | - Ziteng Ji
- Department of Neurosurgery, The First People'Hospital of Xuzhou, Xuzhou, Jiangsu, China
| | - Feng Xu
- Department of Neurosurgery, The First People'Hospital of Xuzhou, Xuzhou, Jiangsu, China
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Ge T, Ning B, Wu Y, Chen X, Qi H, Wang H, Zhao M. MicroRNA-specific therapeutic targets and biomarkers of apoptosis following myocardial ischemia-reperfusion injury. Mol Cell Biochem 2023:10.1007/s11010-023-04876-z. [PMID: 37878166 DOI: 10.1007/s11010-023-04876-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 10/05/2023] [Indexed: 10/26/2023]
Abstract
MicroRNAs are single-stranded non-coding RNAs that participate in post-transcriptional regulation of gene expression, it is involved in the regulation of apoptosis after myocardial ischemia-reperfusion injury. For example, the alteration of mitochondrial structure is facilitated by MicroRNA-1 through the regulation of apoptosis-related proteins, such as Bax and Bcl-2, thereby mitigating cardiomyocyte apoptosis. MicroRNA-21 not only modulates the expression of NF-κB to suppress inflammatory signals but also activates the PI3K/AKT pathway to mitigate ischemia-reperfusion injury. Overexpression of MicroRNA-133 attenuates reactive oxygen species (ROS) production and suppressed the oxidative stress response, thereby mitigating cellular apoptosis. MicroRNA-139 modulates the extrinsic death signal of Fas, while MicroRNA-145 regulates endoplasmic reticulum calcium overload, both of which exert regulatory effects on cardiomyocyte apoptosis. Therefore, the article categorizes the molecular mechanisms based on the three classical pathways and multiple signaling pathways of apoptosis. It summarizes the targets and pathways of MicroRNA therapy for ischemia-reperfusion injury and analyzes future research directions.
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Affiliation(s)
- Teng Ge
- School of Graduate, Shaanxi University of Chinese Medicine, No. 1 Middle Section of Shiji Avenue, Xianyang, 712046, China
| | - Bo Ning
- School of Graduate, Shaanxi University of Chinese Medicine, No. 1 Middle Section of Shiji Avenue, Xianyang, 712046, China
| | - Yongqing Wu
- School of Graduate, Shaanxi University of Chinese Medicine, No. 1 Middle Section of Shiji Avenue, Xianyang, 712046, China
| | - Xiaolin Chen
- School of Pharmacy, Shaanxi University of Chinese Medicine, No. 1 Middle Section of Shiji Avenue, Xianyang, 712046, China
| | - Hongfei Qi
- Shaanxi Key Laboratory of Integrated Traditional and Western Medicine for Prevention and Treatment of Cardiovascular Diseases, Institute of Integrative Medicine, Shaanxi University of Chinese Medicine, No. 1 Middle Section of Shiji Avenue, Xianyang, 712046, China
| | - Haifang Wang
- Shaanxi Key Laboratory of Integrated Traditional and Western Medicine for Prevention and Treatment of Cardiovascular Diseases, Institute of Integrative Medicine, Shaanxi University of Chinese Medicine, No. 1 Middle Section of Shiji Avenue, Xianyang, 712046, China
| | - Mingjun Zhao
- Department of Cardiology, Affiliated Hospital of Shaanxi University of Chinese Medicine, Deputy 2, Weiyang West Road, Weicheng District, Xianyang, 712000, China.
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6
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Wang L, Wang C, Sun Z, Du A, Shan F, Sun Z. Knockdown of Mmu-circ-0001380 Attenuates Myocardial Ischemia/Reperfusion Injury via Modulating miR-106b-5p/Phlpp2 Axis. J Cardiovasc Transl Res 2023; 16:1064-1077. [PMID: 37474690 DOI: 10.1007/s12265-023-10383-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 03/22/2023] [Indexed: 07/22/2023]
Abstract
Myocardial ischemia/reperfusion (MI/R) injury induces myocardial damage and dysfunction. Increasing evidence has confirmed that circular RNAs (circRNAs) play crucial roles in regulating MI/R. Mmu-circ-0001380 has identified to be highly expressed in myocardium of MI/R mouse model. However, its biological function and molecular mechanism in MI/R injury are still unclear. Here, we demonstrated that knockdown of cric-0001380 attenuated myocardial injury of MI/R mice. In vitro, silence of circ-0001380 significantly enhanced viability, and inhibited apoptosis and oxidative stress in HL-1 cells under oxygen-glucose deprivation/reoxygenation (OGD/R). Mmu-miR-106b-5p interacted with circ-0001380, and suppressed the expression of pleckstrin homology domain and leucine rich repeat protein phosphatase 2 (Phlpp2). The miR-106b-5p/Phlpp2 axis mediated the effect of circ-0001380 on OGD/R-induced apoptosis through regulating the phosphorylation of p38, and further involved in regulating the viability and oxidative stress of HL-1 cells. In conclusion, circ-0001380 downregulation relieves MI/R injury via regulating the miR-106b-5p/Phlpp2 axis. The present study indicates that mmu-circ-0001380 exacerbates the myocardial ischemia/reperfusion injury through modulating the miR-106b-5p/Phlpp2 axis in vitro and in vivo.
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Affiliation(s)
- Li Wang
- Department of Cardiology, Dalian Municipal Central Hospital, No. 826, Xinan Road, Dalian, Liaoning, China.
| | - Chuanhe Wang
- Department of Cardiology, Shengjing Hospital of China Medical University, No. 39, Huaxiang Road, Shenyang, Liaoning, China
| | - Zhaoqing Sun
- Department of Cardiology, Shengjing Hospital of China Medical University, No. 39, Huaxiang Road, Shenyang, Liaoning, China
| | - Aolin Du
- Department of Cardiology, Shengjing Hospital of China Medical University, No. 39, Huaxiang Road, Shenyang, Liaoning, China
| | - Fei Shan
- Department of Cardiology, Shengjing Hospital of China Medical University, No. 39, Huaxiang Road, Shenyang, Liaoning, China
| | - Zhijun Sun
- Department of Cardiology, Shengjing Hospital of China Medical University, No. 39, Huaxiang Road, Shenyang, Liaoning, China.
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Xu X, Shi Y, Yu Q, Peng Y, Zhao F, Cui J, Chen Y, Liu L, Zhang Y, Zhang J, Wei B. Coumarin-derived imino sulfonate 5h ameliorates cardiac injury induced by myocardial infarction via activating the Sirt1/Nrf2 signaling pathway. Eur J Pharmacol 2023; 945:175615. [PMID: 36841283 DOI: 10.1016/j.ejphar.2023.175615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 02/14/2023] [Accepted: 02/20/2023] [Indexed: 02/27/2023]
Abstract
Myocardial infarction (MI) is irreversible damage caused by ischemia and hypoxia in coronary arteries accompanied by elevated catecholamine levels, leading to the accumulation of free radicals. Our previous study discovered coumarin-derived imino sulfonates as a novel class of potential cardioprotective agents possessing strong anti-oxidative effects in cardiomyocytes. Therefore, identifying the compound with the highest cardioprotective activity, 5h, and the mechanism involved was necessary. As a kind of catecholamine, isoproterenol can clinically induce myocardial infarction injury similar to the symptoms of myocardial infarction patients. Our experiments explored the underlying mechanism of this effect of compound 5h by assessing cardiac function, infarct size, histopathological changes, and downregulation of Sirt1 by transfection of adenovirus in vitro and by administering Ex527, a specific inhibitor of Sirt1, in vivo. Compound 5h exhibited strong cardioprotective actions in vivo and in vitro via improving cell survival and cardiac function and decreasing the cellular oxidative stress and cardiac infarct size against MI. Furthermore, compound 5h significantly enhanced cardiac expression of Sirt1, subsequently activating the Nrf2/NQO1 signaling pathway. However, adenovirus-induced Sirt1 downregulation or Sirt1-specific inhibitor largely blocked such beneficial effects of 5h in vitro and in vivo, respectively. Taken together, our results demonstrated, for the first time, that the cardioprotective action of 5h against MI was mediated by reducing oxidative stress and apoptosis through the Sirt1/Nrf2 signaling pathway. Our findings proposed novel insights in developing and evaluating coumarin-derived imino sulfonate compounds as epigenetics-targeted drug therapy for MI.
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Affiliation(s)
- Xueli Xu
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, No. 100 Kexue Avenue, Zhengzhou, Henan, 450001, PR China
| | - Yangyang Shi
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, No. 100 Kexue Avenue, Zhengzhou, Henan, 450001, PR China
| | - Qingwen Yu
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, No. 100 Kexue Avenue, Zhengzhou, Henan, 450001, PR China
| | - Yajie Peng
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, No. 100 Kexue Avenue, Zhengzhou, Henan, 450001, PR China
| | - Fei Zhao
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, No. 100 Kexue Avenue, Zhengzhou, Henan, 450001, PR China
| | - Jing Cui
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, No. 100 Kexue Avenue, Zhengzhou, Henan, 450001, PR China
| | - Yajing Chen
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, No. 100 Kexue Avenue, Zhengzhou, Henan, 450001, PR China
| | - Lingxu Liu
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, No. 100 Kexue Avenue, Zhengzhou, Henan, 450001, PR China
| | - Yiran Zhang
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, No. 100 Kexue Avenue, Zhengzhou, Henan, 450001, PR China
| | - Ji Zhang
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, PR China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, 450052, PR China
| | - Bo Wei
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, No. 100 Kexue Avenue, Zhengzhou, Henan, 450001, PR China.
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8
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Liu X, Liu Y, Chen L, Zhang Z, Cui L, Wei T. Loss of pleckstrin homology domain and leucine-rich repeat protein phosphatase 2 has protective effects on high glucose-injured retinal ganglion cells via the effect on the Akt-GSK-3β-Nrf2 pathway. Inflamm Res 2023; 72:373-385. [PMID: 36562794 DOI: 10.1007/s00011-022-01680-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/12/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVE Pleckstrin homology domain and leucine-rich repeat protein phosphatase 2 (PHLPP2) is linked to various pathological states. However, whether PHLPP2 mediates diabetic retinopathy is unaddressed. This work explored the biological function of PHLPP2 in modulating high glucose (HG)-elicited damage of retinal ganglion cells (RGCs), an in vitro model for studying diabetic retinopathy. METHODS Mouse RGCs were treated with HG to establish a cell model. PHLPP2 was silenced by transfecting specific shRNAs targeting PHLPP2. RT-qPCR, immunoblotting, CCK-8 assay, flow cytometry, TUNEL assay, and ELISA were carried out. RESULTS Significant increases in PHLPP2 levels were observed in cultured RGCs exposed to HG. The severe damages evoked by HG to RGCs were remarkably weakened in PHLPP2-silenced RGCs, including improved cell survival, attenuated cell apoptosis, repressed oxidative stress, and prohibited proinflammatory response. The silencing of PHLPP2 strengthened the activation of Nrf2 in HG-treated RGCs via modulation of the Akt-GSK-3β axis. Interruption of the Akt-GSK-3β axis reversed PHLPP2-silencing-elicited Nrf2 activation. The protective effects of PHLPP2 silencing on HG-induced injury of RGCs were diminished by Nrf2 inhibition. CONCLUSIONS The loss of PHLPP2 was beneficial for HG-injured RGCs through the effect on the Akt-GSK-3β-Nrf2 pathway. This work suggests a possible role of PHLPP2 in diabetic retinopathy.
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Affiliation(s)
- Xuan Liu
- Department of Ophthalmology, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 Yanta West Road, Xi'an, 710061, Shaanxi, China.
| | - Yong Liu
- The Institute of Neurobiology, Xi'an Jiaotong University Health Science Center, No. 76 Yanta Road, Xi'an, 710061, Shaanxi, China.
| | - Li Chen
- Department of Ophthalmology, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 Yanta West Road, Xi'an, 710061, Shaanxi, China
| | - Zhichao Zhang
- The Institute of Neurobiology, Xi'an Jiaotong University Health Science Center, No. 76 Yanta Road, Xi'an, 710061, Shaanxi, China
| | - Lijun Cui
- Department of Ophthalmology, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 Yanta West Road, Xi'an, 710061, Shaanxi, China
| | - Ting Wei
- Department of Ophthalmology, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 Yanta West Road, Xi'an, 710061, Shaanxi, China
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9
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Emerging roles of PHLPP phosphatases in the nervous system. Mol Cell Neurosci 2022; 123:103789. [PMID: 36343848 DOI: 10.1016/j.mcn.2022.103789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/15/2022] [Accepted: 10/22/2022] [Indexed: 11/06/2022] Open
Abstract
It has been more than a decade since the discovery of a novel class of phosphatase, the Pleckstrin Homology (PH) domain Leucine-rich repeat Protein Phosphatases (PHLPP). Over time, they have been recognized as crucial regulators of various cellular processes, such as memory formation, cellular survival and proliferation, maintenance of circadian rhythm, and others, with any deregulation in their expression or cellular localization causing havoc in any cellular system. With the ever-growing number of downstream substrates across multiple tissue systems, a web is emerging wherein the central point is PHLPP. A slight nick in the normal signaling cascade of the two isoforms of PHLPP, namely PHLPP1 and PHLPP2, has been recently found to invoke a variety of neurological disorders including Alzheimer's disease, epileptic seizures, Parkinson's disease, and others, in the neuronal system. Improper regulation of the two isoforms has also been associated with various disease pathologies such as diabetes, cardiovascular disorders, cancer, musculoskeletal disorders, etc. In this review, we have summarized all the current knowledge about PHLPP1 (PHLPP1α and PHLPP1β) and PHLPP2 and their emerging roles in regulating various neuronal signaling pathways to pave the way for a better understanding of the complexities. This would in turn aid in providing context for the development of possible future therapeutic strategies.
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METTL14 is required for exercise-induced cardiac hypertrophy and protects against myocardial ischemia-reperfusion injury. Nat Commun 2022; 13:6762. [PMID: 36351918 PMCID: PMC9646739 DOI: 10.1038/s41467-022-34434-y] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 10/26/2022] [Indexed: 11/11/2022] Open
Abstract
RNA m6A modification is the most widely distributed RNA methylation and is closely related to various pathophysiological processes. Although the benefit of regular exercise on the heart has been well recognized, the role of RNA m6A in exercise training and exercise-induced physiological cardiac hypertrophy remains largely unknown. Here, we show that endurance exercise training leads to reduced cardiac mRNA m6A levels. METTL14 is downregulated by exercise, both at the level of RNA m6A and at the protein level. In vivo, wild-type METTL14 overexpression, but not MTase inactive mutant METTL14, blocks exercise-induced physiological cardiac hypertrophy. Cardiac-specific METTL14 knockdown attenuates acute ischemia-reperfusion injury as well as cardiac dysfunction in ischemia-reperfusion remodeling. Mechanistically, silencing METTL14 suppresses Phlpp2 mRNA m6A modifications and activates Akt-S473, in turn regulating cardiomyocyte growth and apoptosis. Our data indicates that METTL14 plays an important role in maintaining cardiac homeostasis. METTL14 downregulation represents a promising therapeutic strategy to attenuate cardiac remodeling.
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11
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He Y, Zhong JH, Wei XD, Huang CY, Peng PL, Yao J, Song XS, Fan WL, Li GC. Pachymic Acid Ameliorates Pulmonary Hypertension by Regulating Nrf2-Keap1-ARE Pathway. Curr Med Sci 2021; 42:56-67. [PMID: 34881424 DOI: 10.1007/s11596-021-2414-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 07/13/2021] [Indexed: 12/01/2022]
Abstract
OBJECTIVE Pulmonary hypertension (PH) is a severe pulmonary vascular disease that eventually leads to right ventricular failure and death. The purpose of this study was to investigate the mechanism by which pachymic acid (PA) pretreatment affects PH and pulmonary vascular remodeling in rats. METHODS PH was induced via hypoxia exposure and administration of PA (5 mg/kg per day) in male Sprague-Dawley rats. Hemodynamic parameters were measured using a right ventricular floating catheter and pulmonary vascular morphometry was measured by hematoxylin-eosin (HE), α-SMA and Masson staining. MTT assays and EdU staining were used to detect cell proliferation, and apoptosis was analyzed by TUNEL staining. Western blotting and immunohistochemistry were used to detect the expression of proteins related to the Nrf2-Keap1-ARE pathway. RESULTS PA significantly alleviated hypoxic PH and reversed right ventricular hypertrophy and pulmonary vascular remodeling. In addition, PA effectively inhibited proliferation and promoted apoptosis in hypoxia-induced pulmonary artery smooth muscle cells (PASMCs). Moreover, PA pretreatment inhibited the expression of peroxy-related factor (MDA) and promoted the expression of antioxidant-related factors (GSH-PX and SOD). Furthermore, hypoxia inhibited the Nrf2-Keap1-ARE signaling pathway, while PA effectively activated this pathway. Most importantly, addition of the Nrf2 inhibitor ML385 reversed the inhibitory effects of PA on ROS generation, proliferation, and apoptosis tolerance in hypoxia-induced PASMCs. CONCLUSION Our study suggests that PA may reverse PH by regulating the Nrf2-Keap1-ARE signaling pathway.
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Affiliation(s)
- Yuan He
- Department of Ultrasound, the Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, 445000, China
| | - Jian-Hua Zhong
- Department of Neurology, the Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, 445000, China
| | - Xiao-Dong Wei
- Department of Thoracic and Cardiovascular Surgery, Minda Hospital of Hubei Minzu University, Enshi, 445000, China
| | - Chu-Ying Huang
- Department of Pulmonary and Critical Care Medicine, the Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, 445000, China
| | - Pai-Lan Peng
- Department of Pulmonary and Critical Care Medicine, the Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, 445000, China
| | - Jun Yao
- Department of Pulmonary and Critical Care Medicine, the Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, 445000, China
| | - Xiu-Sheng Song
- Department of Pulmonary and Critical Care Medicine, the Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, 445000, China
| | - Wan-Li Fan
- Department of Pulmonary and Critical Care Medicine, the Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, 445000, China
| | - Guang-Cai Li
- Department of Pulmonary and Critical Care Medicine, the Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, 445000, China.
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Meng X, Zhang L, Han B, Zhang Z. PHLDA3 inhibition protects against myocardial ischemia/reperfusion injury by alleviating oxidative stress and inflammatory response via the Akt/Nrf2 axis. ENVIRONMENTAL TOXICOLOGY 2021; 36:2266-2277. [PMID: 34351043 DOI: 10.1002/tox.23340] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 06/30/2021] [Accepted: 07/24/2021] [Indexed: 06/13/2023]
Abstract
Pleckstrin homology-like domain family A, member 3 (PHLDA3) has a particularly critical role in regulating cell survival under stress conditions. However, whether PHLDA3 plays a role in myocardial ischemia/reperfusion injury has not been studied. We aimed to assess the possible role of PHLDA3 in myocardial ischemia/reperfusion (I/R) injury. PHLDA3 expression was increased in myocardial tissue from rats with myocardial I/R injury and rat cardiomyocytes with hypoxia/reoxygenation (H/R) injury. PHLDA3 knockdown protected against myocardial I/R injury in vivo and H/R injury in vitro. Inhibition of PHLDA3 increased the activation of nuclear factor erythroid-derived 2-related factor 2 (Nrf2) associated with regulation of the Akt/glycogen synthase kinase-3β (GSK-3β) axis. Repression of Nrf2 reversed PHLDA3-inhibition-mediated cardioprotective effects. Taken together, our work demonstrates that PHLDA3 inhibition exerts a protective role in myocardial I/R injury via regulation of the Akt/GSK-3β/Nrf2 axis. We suggest PHLDA3 as an attractive target for developing treatments against myocardial I/R injury.
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Affiliation(s)
- Xiaoxue Meng
- Department of Cardiology, The First Hospital of Lanzhou University, Lanzhou, China
| | - Lu Zhang
- Department of Cardiology, The First Hospital of Lanzhou University, Lanzhou, China
| | - Bing Han
- Department of Cardiology, The First Hospital of Lanzhou University, Lanzhou, China
| | - Zheng Zhang
- Department of Cardiology, The First Hospital of Lanzhou University, Lanzhou, China
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13
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Lemoine KA, Fassas JM, Ohannesian SH, Purcell NH. On the PHLPPside: Emerging roles of PHLPP phosphatases in the heart. Cell Signal 2021; 86:110097. [PMID: 34320369 PMCID: PMC8403656 DOI: 10.1016/j.cellsig.2021.110097] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 07/20/2021] [Accepted: 07/22/2021] [Indexed: 02/07/2023]
Abstract
PH domain leucine-rich repeat protein phosphatase (PHLPP) is a family of enzymes made up of two isoforms (PHLPP1 and PHLPP2), whose actions modulate intracellular activity via the dephosphorylation of specific serine/threonine (Ser/Thr) residues on proteins such as Akt. Recent data generated in our lab, supported by findings from others, implicates the divergent roles of PHLPP1 and PHLPP2 in maintaining cellular homeostasis since dysregulation of these enzymes has been linked to various pathological states including cardiovascular disease, diabetes, ischemia/reperfusion injury, musculoskeletal disease, and cancer. Therefore, development of therapies to modulate specific isoforms of PHLPP could prove to be therapeutically beneficial in several diseases especially those targeting the cardiovascular system. This review is intended to provide a comprehensive summary of current literature detailing the role of the PHLPP isoforms in the development and progression of heart disease.
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Affiliation(s)
- Kellie A Lemoine
- Department of Pharmacology, University of California, San Diego, La Jolla, CA 92039, USA
| | - Julianna M Fassas
- Department of Pharmacology, University of California, San Diego, La Jolla, CA 92039, USA
| | - Shirag H Ohannesian
- Department of Pharmacology, University of California, San Diego, La Jolla, CA 92039, USA
| | - Nicole H Purcell
- Department of Pharmacology, University of California, San Diego, La Jolla, CA 92039, USA; Cardiovascular Molecular Signaling, Huntington Medical Research Institutes, Pasadena, CA 91105, USA.
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14
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Jin AP, Zhang QR, Yang CL, Ye S, Cheng HJ, Zheng YY. Up-regulation of CTRP12 ameliorates hypoxia/re-oxygenation-induced cardiomyocyte injury by inhibiting apoptosis, oxidative stress, and inflammation via the enhancement of Nrf2 signaling. Hum Exp Toxicol 2021; 40:2087-2098. [PMID: 34085554 DOI: 10.1177/09603271211021880] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
C1q/TNF-related protein 12 (CTRP12) has been reported to play a key role in coronary artery disease. However, whether CTRP12 plays a role in the regulation of myocardial ischemia-reperfusion injury is not fully understood. The goals of this work were to assess the possible relationship between CTRP12 and myocardial ischemia-reperfusion injury. Here, we exposed cardiomyocytes to hypoxia/re-oxygenation (H/R) to establish an in vitro cardiomyocyte injury model of myocardial ischemia-reperfusion injury. Our results showed that H/R treatment resulted in a decrease in CTRP12 expression in cardiomyocytes. The up-regulation of CTRP12 ameliorated H/R-induced cardiomyocyte injury via the down-regulation of apoptosis, oxidative stress, and inflammation. In contrast, the knockdown of CTRP12 enhanced cardiomyocyte sensitivity to H/R-induced cardiomyocyte injury. Further investigation showed that CTRP12 enhanced the levels of nuclear Nrf2 and increased the expression of Nrf2 target genes in cardiomyocytes exposed to H/R. However, the inhibition of Nrf2 markedly diminished CTRP12-overexpression-mediated cardioprotective effects against H/R injury. Overall, these data indicate that CTRP12 protects against H/R-induced cardiomyocyte injury by inhibiting apoptosis, oxidative stress, and inflammation via the enhancement of Nrf2 signaling. This work suggests a potential role of CTRP12 in myocardial ischemia-reperfusion injury and proposes it as an attractive target for cardioprotection.
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Affiliation(s)
- Ai-Ping Jin
- Geriatric Cardiovascular Department, 117799The Second Affiliated Hospital of Xi'an Jiaotong University (Xibei Hospital), Xi'an, Shaanxi Province, China
| | - Qian-Rong Zhang
- Geriatric Cardiovascular Department, 117799The Second Affiliated Hospital of Xi'an Jiaotong University (Xibei Hospital), Xi'an, Shaanxi Province, China
| | - Cui-Ling Yang
- Geriatric Cardiovascular Department, 117799The Second Affiliated Hospital of Xi'an Jiaotong University (Xibei Hospital), Xi'an, Shaanxi Province, China
| | - Sha Ye
- Geriatric Cardiovascular Department, 117799The Second Affiliated Hospital of Xi'an Jiaotong University (Xibei Hospital), Xi'an, Shaanxi Province, China
| | - Hai-Juan Cheng
- Geriatric Cardiovascular Department, 117799The Second Affiliated Hospital of Xi'an Jiaotong University (Xibei Hospital), Xi'an, Shaanxi Province, China
| | - Yuan-Yuan Zheng
- Geriatric Cardiovascular Department, 117799The Second Affiliated Hospital of Xi'an Jiaotong University (Xibei Hospital), Xi'an, Shaanxi Province, China
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15
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Li Y, Yu H, Zhao L, Zhu Y, Bai R, Jin Z, Fu Z, Zhang X, Su J, Liu H, Shi X, Han D, Chen Y. Effects of carbon nanotube-mediated Caspase3 gene silencing on cardiomyocyte apoptosis and cardiac function during early acute myocardial infarction. NANOSCALE 2020; 12:21599-21604. [PMID: 33103172 DOI: 10.1039/d0nr05032f] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
RNA interference (RNAi) technology can achieve efficient and specific silencing of Caspase3 gene expression, thus providing new options for anti-apoptosis treatment. However, delivering siRNA to specific cells and tissues in the body is a significant challenge. Therefore, we aim to construct a functionalized single-walled carbon nanotube (F-CNT) bound to siRNA from Caspase3. The obtained gene transfer carrier F-CNT-siCas3 not only demonstrated a good water solubility and biocompatibility, but also had a high transfection efficiency of up to 82%, which significantly downregulated the expression level of the Caspase3 gene miRNA and protein in primary cardiomyocytes. Furthermore, it was verified by in vivo experiments that Caspase3 gene silencing had obvious protective effects on myocardial cell apoptosis, ventricular remodeling, and cardiac function in Sprague-Dawley (SD) rats after coronary artery ligation. This study may provide an important theoretical basis for the application of F-CNT in vivo siRNA gene therapy to treat cardiovascular diseases.
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Affiliation(s)
- Yi Li
- Department of Cardiology, The Third Medical Center, Chinese PLA General Hospital, Beijing, People's Republic of China
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16
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Qin Z, Kong B, Zheng J, Wang X, Li L. Alprostadil Injection Attenuates Coronary Microembolization-Induced Myocardial Injury Through GSK-3β/Nrf2/HO-1 Signaling-Mediated Apoptosis Inhibition. Drug Des Devel Ther 2020; 14:4407-4422. [PMID: 33122886 PMCID: PMC7588838 DOI: 10.2147/dddt.s272877] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 09/19/2020] [Indexed: 11/24/2022] Open
Abstract
Objective Coronary microembolization (CME) results in progressive contractile dysfunction associated with cardiomyocyte apoptosis. Alprostadil injection improves microcirculation, which is effective in treating various cardiovascular disorders. However, the therapeutic effects of alprostadil in CME-induced myocardia injury remain unknown. Therefore, we evaluated the effects of alprostadil injection on cardiac protection in a rat model of CME and explored the underlying mechanisms. Methods A rat model of CME was established by injecting polyethylene microspheres into the left ventricle. After injection of microspheres, rats in the alprostadil group received alprostadil via tail vein within 2 minutes. Cardiac function, histological alterations in myocardium, serum c-troponin I (cTnI) levels, myocardium adenosine triphosphate (ATP) concentrations, the activity of superoxide dismutase (SOD) and malondialdehyde (MDA) content in myocardium, and myocardial apoptosis-related proteins were detected 12 hours after CME modeling. Results Compared with the Sham group, ATP concentrations, SOD activity in the myocardium, and cardiac function were significantly decreased in a rat model of CME. In addition, serum cTnI levels, MDA content, expression levels of pro-apoptotic proteins, and the number of TUNEL-positive nuclei were remarkably higher in CME group than those in the Sham group. However, alprostadil treatment notably reduced serum cTnI levels and expression levels of pro-apoptotic proteins, while noticeably improved cardiac function, and accelerated SOD activity in the myocardium following CME. Additionally, it was unveiled that the protective effects of alprostadil injection inhibit CME-induced myocardial apoptosis in the myocardium potentially through regulation of the GSK-3β/Nrf2/HO-1 signaling pathway. Conclusion Alprostadil injection seems to significantly suppress oxidative stress, alleviate myocardial apoptosis in the myocardium, and improve cardiac systolic and diastolic functions following CME by regulating the GSK-3β/Nrf2/HO-1 signaling pathway.
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Affiliation(s)
- Zhenbai Qin
- Department of Cardiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Binghui Kong
- Department of Cardiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Jing Zheng
- Department of Cardiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Xiantao Wang
- Department of Cardiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Lang Li
- Department of Cardiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
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17
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Jin A, Cheng H, Xia L, Ye S, Yang C. Inhibition of sphingomyelin synthase 2 relieves hypoxia-induced cardiomyocyte injury by reinforcing Nrf2/ARE activation via modulation of GSK-3β. Hum Exp Toxicol 2020; 40:791-800. [PMID: 33111559 DOI: 10.1177/0960327120969958] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Sphingomyelin synthase 2 (SMS2) is a vital contributor to tissue injury and affects various pathological processes. However, whether SMS2 participates in the modulation of cardiac injury in myocardial infarction has not been determined. This study aimed to evaluate the potential role of SMS2 in the regulation of cardiomyocyte injury induced by hypoxia, an in vitro model for studying myocardial infarction. Our data revealed that SMS2 expression was significantly upregulated in cardiomyocytes in response to hypoxia. Loss-of-function experiments revealed that knockdown of SMS2 markedly restored the viability of cardiomyocytes impaired by hypoxia, and attenuated hypoxia-evoked apoptosis and reactive oxygen species (ROS) generation. In contrast, cardiomyocytes that highly expressed SMS2 were more sensitive to hypoxia-induced injury. Moreover, SMS2 deficiency enhanced the activation of nuclear factor erythroid 2-related factor 2 (Nrf2) signaling through inactivation of glycogen synthase kinase-3β. Notably, suppression of Nrf2 markedly abrogated SMS2 knockdown-mediated cardioprotective effects on hypoxia-exposed cardiomyocytes. Our results illustrate that downregulation of SMS2 exerts a cardioprotective function by protecting cardiomyocytes from hypoxia-induced apoptosis and oxidative stress through enhancement of Nrf2 activation. Our study indicates a potential role of SMS2 in the modulation of cardiac injury, which may contribute to the progression of myocardial infarction.
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Affiliation(s)
- Aiping Jin
- Geriatric Cardiovascular Department, The Second Affiliated Hospital of 117799Xi'an Jiaotong University (Xibei Hospital), Xi'an, Shaanxi Province, China
| | - Haijuan Cheng
- Geriatric Cardiovascular Department, The Second Affiliated Hospital of 117799Xi'an Jiaotong University (Xibei Hospital), Xi'an, Shaanxi Province, China
| | - Lina Xia
- Geriatric Cardiovascular Department, The Second Affiliated Hospital of 117799Xi'an Jiaotong University (Xibei Hospital), Xi'an, Shaanxi Province, China
| | - Sha Ye
- Geriatric Cardiovascular Department, The Second Affiliated Hospital of 117799Xi'an Jiaotong University (Xibei Hospital), Xi'an, Shaanxi Province, China
| | - Cuiling Yang
- Geriatric Cardiovascular Department, The Second Affiliated Hospital of 117799Xi'an Jiaotong University (Xibei Hospital), Xi'an, Shaanxi Province, China
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Ashrafizadeh M, Ahmadi Z, Farkhondeh T, Samarghandian S. Back to Nucleus: Combating with Cadmium Toxicity Using Nrf2 Signaling Pathway as a Promising Therapeutic Target. Biol Trace Elem Res 2020; 197:52-62. [PMID: 31786752 DOI: 10.1007/s12011-019-01980-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 11/06/2019] [Indexed: 12/25/2022]
Abstract
There are concerns about the spread of heavy metals in the environment, and human activities are one of the most important factors in their spread. These agents have the high half-life resulting in their persistence in the environment. So, prevention of their spread is the first step. However, heavy metals are an inevitable part of modern and industrial life and they are applied in different fields. Cadmium is one of the heavy metals which has high carcinogenesis ability. Industrial waste, vehicle emissions, paints, and fertilizers are ways of exposing human to cadmium. This potentially toxic agent harmfully affects the various organs and systems of body such as the liver, kidney, brain, and cardiovascular system. Oxidative stress is one of the most important pathways of cadmium toxicity. So, improving the antioxidant defense system can be considered as a potential target. On the other hand, the Nrf2 signaling pathway involves improving the antioxidant capacity by promoting the activity of antioxidant enzymes such as catalase and superoxide dismutase. At the present review, we demonstrate how Nrf2 signaling pathway can be modulated to diminish the cadmium toxicity.
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Affiliation(s)
- Milad Ashrafizadeh
- Department of Basic Science, Faculty of Veterinary Medicine, University of Tabriz, Tabriz, Iran
| | - Zahra Ahmadi
- Department of Basic Science, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran
| | - Tahereh Farkhondeh
- Cardiovascular Diseases Research Center, Birjand University of Medical Sciences, Birjand, Iran
| | - Saeed Samarghandian
- Department of Basic Medical Sciences, Neyshabur University of Medical Sciences, Neyshabur, Iran.
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Yan L, Cheng G, Yang G. GSKIP protects cardiomyocytes from hypoxia/reoxygenation-induced injury by enhancing Nrf2 activation via GSK-3β inhibition. Biochem Biophys Res Commun 2020; 532:68-75. [PMID: 32828530 DOI: 10.1016/j.bbrc.2020.06.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 06/07/2020] [Indexed: 01/24/2023]
Abstract
Glycogen synthase kinase (GSK)-3β interaction protein (GSKIP), a key regulator of signaling transduction, is implicated in multiple pathological processes. However, whether GSKIP is involved in myocardial infarction is unknown. The present study was designed to determine the potential involvement of GSKIP in myocardial hypoxia/reoxygenation (H/R) injury, as an in vitro model for the study of myocardial infarction. Our data showed that H/R treatment triggered a marked decrease in GSKIP expression in cardiomyocytes. The upregulation of GSKIP significantly rescued the decreased viability of H/R-exposed cardiomyocytes and attenuated H/R-induced apoptosis and reactive oxygen species (ROS) generation. On the contrary, the depletion of GSKIP enhanced the sensitivity of cardiomyocytes to H/R-induced injury. Further data exhibited that GSKIP overexpression upregulated the nuclear expression of nuclear factor-erythroid-derived 2-related factor 2 (Nrf2) and increased Nrf2/antioxidant response element (ARE)-mediated transcription activity associated with upregulation of GSK-3β phosphorylation. Interestingly, inhibition of GSK-3β by a chemical inhibitor markedly enhanced Nrf2/ARE activation and abrogated GSKIP depletion-exacerbated sensitivity to H/R-induced injury. In addition, Nrf2 inhibition markedly reversed GSKIP overexpression-induced cardioprotective effect against H/R injury. Overall, these results demonstrate that overexpression of GSKIP alleviates H/R-induced apoptosis and oxidative stress in cardiomyocytes by enhancing Nrf2/ARE antioxidant signaling via GSK-3β inhibition. Our study indicates a potential role of GSKIP in myocardial infarction and GSKIP may serve as a promising molecular target for cardioprotection.
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Affiliation(s)
- Li Yan
- Department of Cardiology, Shaanxi Provincial People's Hospital, Xi'an, 710068, China
| | - Gong Cheng
- Department of Cardiology, Shaanxi Provincial People's Hospital, Xi'an, 710068, China
| | - Guang Yang
- Department of Cardiology, Shaanxi Provincial People's Hospital, Xi'an, 710068, China.
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HIPK2 overexpression relieves hypoxia/reoxygenation-induced apoptosis and oxidative damage of cardiomyocytes through enhancement of the Nrf2/ARE signaling pathway. Chem Biol Interact 2020; 316:108922. [DOI: 10.1016/j.cbi.2019.108922] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 11/20/2019] [Accepted: 12/10/2019] [Indexed: 12/19/2022]
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