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An Y, Wang X, Guan X, Yuan P, Liu Y, Wei L, Wang F, Qi X. Endoplasmic reticulum stress-mediated cell death in cardiovascular disease. Cell Stress Chaperones 2024; 29:158-174. [PMID: 38295944 PMCID: PMC10939083 DOI: 10.1016/j.cstres.2023.12.003] [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: 10/19/2023] [Revised: 12/25/2023] [Accepted: 12/25/2023] [Indexed: 02/24/2024] Open
Abstract
The endoplasmic reticulum (ER) plays a vital function in maintaining cellular homeostasis. Endoplasmic reticulum stress (ERS) can trigger various modes of cell death by activating the unfolded protein response (UPR) signaling pathway. Cell death plays a crucial role in the occurrence and development of diseases such as cancer, liver diseases, neurological diseases, and cardiovascular diseases. Several cardiovascular diseases including hypertension, atherosclerosis, and heart failure are associated with ER stress. ER stress-mediated cell death is of interest in cardiovascular disease. Moreover, an increasing body of evidence supports the potential of modulating ERS for treating cardiovascular disease. This paper provides a comprehensive review of the UPR signaling pathway, the mechanisms that induce cell death, and the modes of cell death in cardiovascular diseases. Additionally, we discuss the mechanisms of ERS and UPR in common cardiovascular diseases, along with potential therapeutic strategies.
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Affiliation(s)
- Yajuan An
- School of Graduate Studies, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Xinshuang Wang
- School of Graduate Studies, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Xiuju Guan
- School of Graduate Studies, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Peng Yuan
- School of Graduate Studies, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Yue Liu
- Department of Cardiology, Tianjin Union Medical Center, Tianjin, China
| | - Liping Wei
- Department of Cardiology, Tianjin Union Medical Center, Tianjin, China
| | - Fei Wang
- Department of Vascular Surgery, Hebei General Hospital, Hebei, China
| | - Xin Qi
- School of Graduate Studies, Tianjin University of Traditional Chinese Medicine, Tianjin, China; Department of Cardiology, Tianjin Union Medical Center, Tianjin, China.
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Li W, Liu P, Liu H, Zhang F, Fu Y. Integrative analysis of genes reveals endoplasmic reticulum stress-related immune responses involved in dilated cardiomyopathy with fibrosis. Apoptosis 2023; 28:1406-1421. [PMID: 37462883 PMCID: PMC10425499 DOI: 10.1007/s10495-023-01871-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/30/2023] [Indexed: 08/11/2023]
Abstract
Endoplasmic reticulum (ER) stress has been implicated in the mechanisms underlying the fibrotic process in dilated cardiomyopathy (DCM) and results in disease exacerbation; however, the molecular details of this mechanism remain unclear. Through microarray and bioinformatic analyses, we explored genetic alterations in myocardial fibrosis (MF) and identified potential biomarkers related to ER stress. We integrated two public microarray datasets, including 19 DCM and 16 control samples, and comprehensively analyzed differential expression, biological functions, molecular interactions, and immune infiltration levels. The immune cell signatures suggest that inflammatory immune imbalance may promote MF progression. Both innate and adaptive immunity are involved in MF development, and T-cell subsets account for a considerable proportion of immune infiltration. The immune subtypes were further compared, and 103 differentially expressed ER stress-related genes were identified. These genes were mainly enriched in neuronal apoptosis, protein modification, oxidative stress reaction, glycolysis and gluconeogenesis, and NOD-like receptor signaling pathways. Furthermore, the 15 highest-scoring core genes were identified. Seven hub genes (AK1, ARPC3, GSN, KPNA2, PARP1, PFKL, and PRKC) might participate in immune-related mechanisms. Our results offer a new integrative view of the pathways and interaction networks of ER stress-related genes and provide guidance for developing novel therapeutic strategies for MF.
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Affiliation(s)
- Wanpeng Li
- Department of Cardiology, Gansu Provincial Hospital, Lanzhou, 730000, P.R., China
| | - Peiling Liu
- Department of Rheumatology, First Affiliated Hospital of Zhengzhou University Zhengzhou, Henan, 450000, P.R., China
| | - Huilin Liu
- Department of Geriatrics, Peking University Third Hospital, Beijing, 100191, P.R , China
| | - Fuchun Zhang
- Department of Geriatrics, Peking University Third Hospital, Beijing, 100191, P.R , China
| | - Yicheng Fu
- Department of Geriatrics, Peking University Third Hospital, Beijing, 100191, P.R , China.
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Plotnikov MB, Chernysheva GA, Smol’yakova VI, Aliev OI, Fomina TI, Sandrikina LA, Sukhodolo IV, Ivanova VV, Osipenko AN, Anfinogenova ND, Khlebnikov AI, Atochin DN, Schepetkin IA, Quinn MT. Cardioprotective Effects of a Selective c-Jun N-terminal Kinase Inhibitor in a Rat Model of Myocardial Infarction. Biomedicines 2023; 11:714. [PMID: 36979693 PMCID: PMC10044897 DOI: 10.3390/biomedicines11030714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 02/22/2023] [Accepted: 02/23/2023] [Indexed: 03/03/2023] Open
Abstract
Activation of c-Jun N-terminal kinases (JNKs) is involved in myocardial injury, left ventricular remodeling (LV), and heart failure (HF) after myocardial infarction (MI). The aim of this research was to evaluate the effects of a selective JNK inhibitor, 11H-indeno [1,2-b]quinoxalin-11-one oxime (IQ-1), on myocardial injury and acute myocardial ischemia/reperfusion (I/R) in adult male Wistar rats. Intraperitoneal administration of IQ-1 (25 mg/kg daily for 5 days) resulted in a significant decrease in myocardial infarct size on day 5 after MI. On day 60 after MI, a significant (2.6-fold) decrease in LV scar size, a 2.2-fold decrease in the size of the LV cavity, a 2.9-fold decrease in the area of mature connective tissue, and a 1.7-fold decrease in connective tissue in the interventricular septum were observed compared with the control group. The improved contractile function of the heart resulted in a significant (33%) increase in stroke size, a 40% increase in cardiac output, a 12% increase in LV systolic pressure, a 28% increase in the LV maximum rate of pressure rise, a 45% increase in the LV maximum rate of pressure drop, a 29% increase in the contractility index, a 14% increase in aortic pressure, a 2.7-fold decrease in LV end-diastolic pressure, and a 4.2-fold decrease in LV minimum pressure. We conclude that IQ-1 has cardioprotective activity and reduces the severity of HF after MI.
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Affiliation(s)
- Mark B. Plotnikov
- Department of Pharmacology, Goldberg Research Institute of Pharmacology and Regenerative Medicine, Tomsk National Research Medical Center, Russian Academy of Sciences, 634028 Tomsk, Russia
- Faculty of Radiophysics, National Research Tomsk State University, 634050 Tomsk, Russia
| | - Galina A. Chernysheva
- Department of Pharmacology, Goldberg Research Institute of Pharmacology and Regenerative Medicine, Tomsk National Research Medical Center, Russian Academy of Sciences, 634028 Tomsk, Russia
| | - Vera I. Smol’yakova
- Department of Pharmacology, Goldberg Research Institute of Pharmacology and Regenerative Medicine, Tomsk National Research Medical Center, Russian Academy of Sciences, 634028 Tomsk, Russia
| | - Oleg I. Aliev
- Department of Pharmacology, Goldberg Research Institute of Pharmacology and Regenerative Medicine, Tomsk National Research Medical Center, Russian Academy of Sciences, 634028 Tomsk, Russia
| | - Tatyana I. Fomina
- Department of Pharmacology, Goldberg Research Institute of Pharmacology and Regenerative Medicine, Tomsk National Research Medical Center, Russian Academy of Sciences, 634028 Tomsk, Russia
| | - Lyubov A. Sandrikina
- Department of Pharmacology, Goldberg Research Institute of Pharmacology and Regenerative Medicine, Tomsk National Research Medical Center, Russian Academy of Sciences, 634028 Tomsk, Russia
| | - Irina V. Sukhodolo
- Department of Morphology and General Pathology, Siberian State Medical University, 634050 Tomsk, Russia
| | - Vera V. Ivanova
- Department of Morphology and General Pathology, Siberian State Medical University, 634050 Tomsk, Russia
| | - Anton N. Osipenko
- Department of Pharmacology, Siberian State Medical University, 634050 Tomsk, Russia
| | - Nina D. Anfinogenova
- Cardiology Research Institute, Tomsk National Research Medical Center, Russian Academy of Sciences, 634012 Tomsk, Russia
| | | | - Dmitriy N. Atochin
- Kizhner Research Center, Tomsk Polytechnic University, 634050 Tomsk, Russia
- Cardiovascular Research Center, Cardiology Division, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02115, USA
| | - Igor A. Schepetkin
- Department of Microbiology and Cell Biology, Montana State University, Bozeman, MT 59717, USA
| | - Mark T. Quinn
- Department of Microbiology and Cell Biology, Montana State University, Bozeman, MT 59717, USA
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Relaxin-3 Ameliorates Diabetic Cardiomyopathy by Inhibiting Endoplasmic Reticulum Stress. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:9380283. [PMID: 36203531 PMCID: PMC9532149 DOI: 10.1155/2022/9380283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 09/07/2022] [Accepted: 09/12/2022] [Indexed: 12/02/2022]
Abstract
Background This study is aimed at investigating whether relaxin-3 exhibits protective effects against cardiomyopathy in diabetic rats by suppressing ERS. Methods Eighty male SD rats were randomly divided into two groups: controls (n = 20) and diabetes (n = 60). The streptozotocin-treated rats were randomly divided into three groups: diabetic group (DM), low-dose relaxin-3 group (0.2 μg/kg/d), and high-dose relaxin-3 group (2 μg/kg/d). The myocardial tissues and collagen fiber were observed by hematoxylin and eosin (H&E) and Masson staining. Serum brain natriuretic peptide (BNP), troponin (TNI), myoglobin, interleukin (IL-17), interleukin (IL)-1α, and tumor necrosis factor (TNF)-α were determined by ELISA. The protein expression of glucose regulatory protein 78 (GRP78) and C/EBP homologous protein (CHOP) in the heart tissue of each group was detected by Western blot analysis. Results (1) HE and Masson staining indicated that relaxin-3 could attenuate myocardial lesions and myocardial collagen volume fraction. (2) BNP, TnI, and myoglobin in the DM group at four and eight weeks were significantly higher than in the controls (P < 0.01). The relaxin-3-treated groups showed significantly reduced serum BNP, TnI, and myoglobin levels compared with the DM group (P < 0.05). (3) IL-17, IL-1α, and TNF-α levels in the DM rats at 4 weeks were higher than in the controls (P < 0.05). Low or high dose of relaxin-3-treated groups showed reduced serum IL-17 and TNF-α levels compared with the DM group at four and eight weeks (P < 0.05). (4) CHOP and GRP78 protein expression was increased in the DM group at four and eight weeks compared with the controls (P < 0.01), and small and large doses of relaxin-3 significantly reduced GRP78 and CHOP protein expression. Conclusions Exogenous relaxin-3 ameliorates diabetic cardiomyopathy by inhibiting ERS in diabetic rats.
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Cui X, Zhang Y, Lu Y, Xiang M. ROS and Endoplasmic Reticulum Stress in Pulmonary Disease. Front Pharmacol 2022; 13:879204. [PMID: 35559240 PMCID: PMC9086276 DOI: 10.3389/fphar.2022.879204] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Accepted: 03/11/2022] [Indexed: 12/25/2022] Open
Abstract
Pulmonary diseases are main causes of morbidity and mortality worldwide. Current studies show that though specific pulmonary diseases and correlative lung-metabolic deviance own unique pathophysiology and clinical manifestations, they always tend to exhibit common characteristics including reactive oxygen species (ROS) signaling and disruptions of proteostasis bringing about accumulation of unfolded or misfolded proteins in the endoplasmic reticulum (ER). ER is generated by the unfolded protein response. When the adaptive unfolded protein response (UPR) fails to preserve ER homeostasis, a maladaptive or terminal UPR is engaged, leading to the disruption of ER integrity and to apoptosis, which is called ER stress. The ER stress mainly includes the accumulation of misfolded and unfolded proteins in lumen and the disorder of Ca2+ balance. ROS mediates several critical aspects of the ER stress response. We summarize the latest advances in of the UPR and ER stress in the pathogenesis of pulmonary disease and discuss potential therapeutic strategies aimed at restoring ER proteostasis in pulmonary disease.
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Affiliation(s)
- Xiangning Cui
- Department of Cardiovascular, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Yang Zhang
- First Clinical Medical School, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Yingdong Lu
- Department of Cardiovascular, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Mi Xiang
- Department of Cardiovascular, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
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The integrated stress response in ischemic diseases. Cell Death Differ 2022; 29:750-757. [PMID: 34743204 PMCID: PMC8990009 DOI: 10.1038/s41418-021-00889-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 09/27/2021] [Accepted: 09/29/2021] [Indexed: 12/20/2022] Open
Abstract
Ischemic disease is among the deadliest and most disabling illnesses. Prominent examples include myocardial infarction and stroke. Most, if not all, underlying pathological changes, including oxidative stress, inflammation, and nutrient deprivation, are potent inducers of the integrated stress response (ISR). Four upstream kinases are involved in ISR signaling that sense a myriad of input stress signals and converge on the phosphorylation of serine 51 of eukaryotic translation initiation factor 2α (eIF2α). As a result, translation initiation is halted, creating a window of opportunity for the cell to repair itself and restore homeostasis. A growing number of studies show strong induction of the ISR in ischemic disease. Genetic and pharmacological evidence suggests that the ISR plays critical roles in disease initiation and progression. Here, we review the basic regulation of the ISR, particularly in response to ischemia, and summarize recent findings relevant to the actions of the ISR in ischemic disease. We then discuss therapeutic opportunities by modulating the ISR to treat ischemic heart disease, brain ischemia, ischemic liver disease, and ischemic kidney disease. Finally, we propose that the ISR represents a promising therapeutic target for alleviating symptoms of ischemic disease and improving clinical outcomes.
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The Downregulation of ADAM17 Exerts Protective Effects against Cardiac Fibrosis by Regulating Endoplasmic Reticulum Stress and Mitophagy. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:5572088. [PMID: 34035876 PMCID: PMC8118735 DOI: 10.1155/2021/5572088] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 03/27/2021] [Accepted: 04/09/2021] [Indexed: 02/08/2023]
Abstract
Background A disintegrin and metalloproteinase 17 (ADAM17) is a transmembrane protein that is widely expressed in various tissues; it mediates the shedding of many membrane-bound molecules, involving cell-cell and cell-matrix interactions. We investigated the role of ADAM17 within mouse cardiac fibroblasts (mCFs) in heart fibrosis. Methods mCFs were isolated from the hearts of neonatal mice. Effects of ADAM17 on the differentiation of mCFs towards myofibroblasts and their fibrotic behaviors following induction with TGF-β1 were examined. The expression levels of fibrotic proteins, such as collagen I and α-SMA, were assessed by qRT-PCR analysis and western blotting. Cell proliferation and migration were measured using the CCK-8 and wound healing assay. To identify the target gene for ADAM17, the protein levels of the components of endoplasmic reticulum (ER) stress and the PINK1/Parkin pathway were assessed following ADAM17 silencing. The effects of ADAM17 silencing or treatment with thapsigargin, a key stimulator of acute ER stress, on mCFs proliferation, migration, and collagen secretion were also examined. In vivo, we used a mouse model of cardiac fibrosis established by left anterior descending artery ligation; the mice were administered oral gavage with a selective ADAM17 inhibitor (TMI-005) for 4 weeks after the operation. Results We found that the ADAM17 expression levels were higher in fibrosis heart tissues and TGF-β1-treated mCFs. The ADAM17-specific siRNAs decreased TGF-β1-induced increase in the collagen secretion, proliferation, and migration of mCFs. Knockdown of ADAM17 reduces the activation of mCFs by inhibiting the ATF6 branch of ER stress and further activating mitophagy. Moreover, decreased ADAM17 expression also ameliorated cardiac fibrosis and improved heart function. Conclusions This study highlights that mCF ADAM17 expression plays a key role in cardiac fibrosis by regulating ER stress and mitophagy, thereby limiting fibrosis and improving heart function. Therefore, ADAM17 downregulation, within the physiological range, could exert protective effects against cardiac fibrosis.
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McCarty MF. Nutraceutical, Dietary, and Lifestyle Options for Prevention and Treatment of Ventricular Hypertrophy and Heart Failure. Int J Mol Sci 2021; 22:ijms22073321. [PMID: 33805039 PMCID: PMC8037104 DOI: 10.3390/ijms22073321] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/22/2021] [Accepted: 03/22/2021] [Indexed: 12/12/2022] Open
Abstract
Although well documented drug therapies are available for the management of ventricular hypertrophy (VH) and heart failure (HF), most patients nonetheless experience a downhill course, and further therapeutic measures are needed. Nutraceutical, dietary, and lifestyle measures may have particular merit in this regard, as they are currently available, relatively safe and inexpensive, and can lend themselves to primary prevention as well. A consideration of the pathogenic mechanisms underlying the VH/HF syndrome suggests that measures which control oxidative and endoplasmic reticulum (ER) stress, that support effective nitric oxide and hydrogen sulfide bioactivity, that prevent a reduction in cardiomyocyte pH, and that boost the production of protective hormones, such as fibroblast growth factor 21 (FGF21), while suppressing fibroblast growth factor 23 (FGF23) and marinobufagenin, may have utility for preventing and controlling this syndrome. Agents considered in this essay include phycocyanobilin, N-acetylcysteine, lipoic acid, ferulic acid, zinc, selenium, ubiquinol, astaxanthin, melatonin, tauroursodeoxycholic acid, berberine, citrulline, high-dose folate, cocoa flavanols, hawthorn extract, dietary nitrate, high-dose biotin, soy isoflavones, taurine, carnitine, magnesium orotate, EPA-rich fish oil, glycine, and copper. The potential advantages of whole-food plant-based diets, moderation in salt intake, avoidance of phosphate additives, and regular exercise training and sauna sessions are also discussed. There should be considerable scope for the development of functional foods and supplements which make it more convenient and affordable for patients to consume complementary combinations of the agents discussed here. Research Strategy: Key word searching of PubMed was employed to locate the research papers whose findings are cited in this essay.
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Affiliation(s)
- Mark F McCarty
- Catalytic Longevity Foundation, 811 B Nahant Ct., San Diego, CA 92109, USA
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9
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Endoplasmic reticulum stress and unfolded protein response in cardiovascular diseases. Nat Rev Cardiol 2021; 18:499-521. [PMID: 33619348 DOI: 10.1038/s41569-021-00511-w] [Citation(s) in RCA: 281] [Impact Index Per Article: 93.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/11/2021] [Indexed: 02/07/2023]
Abstract
Cardiovascular diseases (CVDs), such as ischaemic heart disease, cardiomyopathy, atherosclerosis, hypertension, stroke and heart failure, are among the leading causes of morbidity and mortality worldwide. Although specific CVDs and the associated cardiometabolic abnormalities have distinct pathophysiological and clinical manifestations, they often share common traits, including disruption of proteostasis resulting in accumulation of unfolded or misfolded proteins in the endoplasmic reticulum (ER). ER proteostasis is governed by the unfolded protein response (UPR), a signalling pathway that adjusts the protein-folding capacity of the cell to sustain the cell's secretory function. When the adaptive UPR fails to preserve ER homeostasis, a maladaptive or terminal UPR is engaged, leading to the disruption of ER integrity and to apoptosis. ER stress functions as a double-edged sword, with long-term ER stress resulting in cellular defects causing disturbed cardiovascular function. In this Review, we discuss the distinct roles of the UPR and ER stress response as both causes and consequences of CVD. We also summarize the latest advances in our understanding of the importance of the UPR and ER stress in the pathogenesis of CVD and discuss potential therapeutic strategies aimed at restoring ER proteostasis in CVDs.
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Li Y, Lu H, Xu W, Shang Y, Zhao C, Wang Y, Yang R, Jin S, Wu Y, Wang X, Teng X. Apelin ameliorated acute heart failure via inhibiting endoplasmic reticulum stress in rabbits. Amino Acids 2021; 53:417-427. [PMID: 33609179 DOI: 10.1007/s00726-021-02955-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 02/04/2021] [Indexed: 12/12/2022]
Abstract
This study aimed to investigate whether inhibition of endoplasmic reticulum stress (ERS) mediated the ameliorative effect of apelin on acute heart failure (AHF). Rabbit model of AHF was induced by sodium pentobarbital. Cardiac dysfunction and injury were detected in the rabbit models of AHF, including impaired hemodynamic parameters and increased levels of CK-MB and cTnI. Apelin treatment dramatically improved cardiac impairment caused by AHF. ERS, indexed by increased GRP78, CHOP, and cleaved-caspase12 protein levels, was simultaneously attenuated by apelin. Apelin also could ameliorate increased protein levels of cleaved-caspase3 and Bax, and improved decreased protein levels of Bcl-2. Two common ERS stimulators, tunicamycin (Tm) and dithiothreitol (DTT) blocked the ameliorative effect of apelin on AHF. Phosphorylated Akt levels increased after apelin treatment in the rabbit models of AHF. The Akt signaling inhibitors wortmannin and LY294002 could block the cardioprotective effect of apelin, which could be relieved by ERS inhibitor 4-phenyl butyric acid (4-PBA). The aforementioned beneficial effects of apelin could all be blocked by APJ receptor antagonist F13A. 4-PBA and SC79, an Akt activator, can restore the ameliorative effect of apelin on AHF blocked by F13A. Apelin treatment dramatically ameliorated cardiac impairment caused by AHF, which might be mediated by APJ/Akt/ERS signaling pathway. These results will shed new light on AHF therapy.
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Affiliation(s)
- Yanqing Li
- Hebei Provincial Hospital of Chinese Medicine, Hebei University of Chines Medicine, Shijiazhuang, 050011, China
| | - Haohan Lu
- Department of Physiology, Hebei Medical University, Zhongshan East Road No. 361, Shijiazhuang, 050017, China
| | - Wenyuan Xu
- Department of Physiology, Hebei Medical University, Zhongshan East Road No. 361, Shijiazhuang, 050017, China
| | - Yuxuan Shang
- Department of Physiology, Hebei Medical University, Zhongshan East Road No. 361, Shijiazhuang, 050017, China
| | - Cece Zhao
- Department of Physiology, Hebei Medical University, Zhongshan East Road No. 361, Shijiazhuang, 050017, China
| | - Yipu Wang
- Department of Physiology, Hebei Medical University, Zhongshan East Road No. 361, Shijiazhuang, 050017, China
| | - Rui Yang
- Department of Physiology, Hebei Medical University, Zhongshan East Road No. 361, Shijiazhuang, 050017, China
| | - Sheng Jin
- Department of Physiology, Hebei Medical University, Zhongshan East Road No. 361, Shijiazhuang, 050017, China
| | - Yuming Wu
- Department of Physiology, Hebei Medical University, Zhongshan East Road No. 361, Shijiazhuang, 050017, China
- Hebei Collaborative Innovation Center for Cardio-cerebrovascular Disease, Shijiazhuang, 050017, China
| | - Xiaoning Wang
- The Second Hospital, Hebei Medical University, Heping West Road No. 215, Shijiazhuang, 050000, China.
| | - Xu Teng
- Department of Physiology, Hebei Medical University, Zhongshan East Road No. 361, Shijiazhuang, 050017, China.
- Hebei Key Laboratory of Laboratory Animal Science, Shijiazhuang, 050017, China.
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Zadorozhnii PV, Kiselev VV, Kharchenko AV. In silico toxicity evaluation of Salubrinal and its analogues. Eur J Pharm Sci 2020; 155:105538. [PMID: 32889087 DOI: 10.1016/j.ejps.2020.105538] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 08/14/2020] [Accepted: 08/30/2020] [Indexed: 02/06/2023]
Abstract
This paper reports on a comprehensive in silico toxicity assessment of Salubrinal and its analogues containing a cinnamic acid residue or quinoline ring using the online servers admetSAR, ADMETlab, ProTox, ADVERPred, Pred-hERG and Vienna LiverTox. Apart from rare exceptions, in all 55 studied structures, mild or practical absence of acute toxicity was predicted for rats (III or IV toxicity class). Cardiotoxic, hepatotoxic and immunotoxic effects were predicted for Salubrinal and its analogues. We constructed models of the main predicted anti-targets hERG, BSEP, MRP3, MRP4 and AhR using the principle of homologous modeling. Molecular docking studies were carried out with the obtained models. We carried out molecular docking for all targets using AutoDock Vina, implemented in the PyRx 0.8 software package. According to the results of molecular docking, the compounds analyzed are potential moderate or weak hERG blockers. Induction of cholestasis and, as a consequence, liver damage by these drugs, directly related to inhibition of BSEP, MRP3 and MRP4, most likely will not be observed. Interaction with AhR for the studied compounds is impossible for steric reasons and, as a consequence, toxic effects on the immune and other organ systems associated with the activation of the AhR signaling pathway are excluded.
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Affiliation(s)
- Pavlo V Zadorozhnii
- Department of pharmacy and technology of organic substances, Ukrainian State University of Chemical Technology, Gagarin Ave., 8, Dnipro 49005, Ukraine.
| | - Vadym V Kiselev
- Department of pharmacy and technology of organic substances, Ukrainian State University of Chemical Technology, Gagarin Ave., 8, Dnipro 49005, Ukraine
| | - Aleksandr V Kharchenko
- Department of pharmacy and technology of organic substances, Ukrainian State University of Chemical Technology, Gagarin Ave., 8, Dnipro 49005, Ukraine
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Abstract
Atrial fibrillation (AF), the most common progressive and age-related cardiac arrhythmia, affects millions of people worldwide. AF is associated with common risk factors, including hypertension, diabetes mellitus, and obesity, and serious complications such as stroke and heart failure. Notably, AF is progressive in nature, and because current treatment options are mainly symptomatic, they have only a moderate effect on prevention of arrhythmia progression. Hereto, there is an urgent unmet need to develop mechanistic treatments directed at root causes of AF. Recent research findings indicate a key role for inflammasomes and derailed proteostasis as root causes of AF. Here, we elaborate on the molecular mechanisms of these 2 emerging key pathways driving the pathogenesis of AF. First the role of NLRP3 (NACHT, LRR, and PYD domains-containing protein 3) inflammasome on AF pathogenesis and cardiomyocyte remodeling is discussed. Then we highlight pathways of proteostasis derailment, including exhaustion of cardioprotective heat shock proteins, disruption of cytoskeletal proteins via histone deacetylases, and the recently discovered DNA damage-induced nicotinamide adenine dinucleotide+ depletion to underlie AF. Moreover, potential interactions between the inflammasomes and proteostasis pathways are discussed and possible therapeutic targets within these pathways indicated.
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Affiliation(s)
- Na Li
- From the Department of Medicine (Cardiovascular Research) (N.L.), Baylor College of Medicine, Houston, TX.,Department of Molecular Physiology and Biophysics (N.L.), Baylor College of Medicine, Houston, TX.,Cardiovascular Research Institute (N.L.), Baylor College of Medicine, Houston, TX
| | - Bianca J J M Brundel
- Department of Physiology, Amsterdam UMC, Vrije Universiteit, Amsterdam Cardiovascular Sciences, the Netherlands (B.J.J.M.B.)
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Stoner MW, McTiernan CF, Scott I, Manning JR. Calreticulin expression in human cardiac myocytes induces ER stress-associated apoptosis. Physiol Rep 2020; 8:e14400. [PMID: 32323496 PMCID: PMC7177173 DOI: 10.14814/phy2.14400] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 02/17/2020] [Accepted: 02/18/2020] [Indexed: 12/17/2022] Open
Abstract
The global burden of heart failure following myocardial ischemia-reperfusion (IR) injury is a growing problem. One pathway that is key to understanding the progression of myocardial infarction and IR injury is the endoplasmic reticulum (ER) stress pathway, which contributes to apoptosis signaling and tissue death. The role of calreticulin in the progression of ER stress remains controversial. We hypothesized that calreticulin induction drives proapoptotic signaling in response to ER stress. We find here that calreticulin is upregulated in human ischemic heart failure cardiac tissue, as well as simulated hypoxia and reoxygenation (H/R) and thapsigargin-mediated ER stress. To test the impact of direct modulation of calreticulin expression on ER stress-induced apoptosis, human cardiac-derived AC16 cells with stable overexpression or silencing of calreticulin were subjected to thapsigargin treatment, and markers of apoptosis were evaluated. It was found that overexpression of calreticulin promotes apoptosis, while a partial knockdown protects against the expression of caspase 12, CHOP, and reduces thapsigargin-driven TUNEL staining. These data shed light on the role that calreticulin plays in apoptosis signaling during ER stress in cardiac cells.
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Affiliation(s)
- Michael W. Stoner
- Division of CardiologyDepartment of MedicineUniversity of PittsburghPittsburghPAUSA
- Department of MedicineVascular Medicine InstituteUniversity of PittsburghPittsburghPAUSA
- Department of MedicineCenter for Metabolism and Mitochondrial MedicineUniversity of PittsburghPAUSA
| | - Charles F. McTiernan
- Division of CardiologyDepartment of MedicineUniversity of PittsburghPittsburghPAUSA
- Department of MedicineVascular Medicine InstituteUniversity of PittsburghPittsburghPAUSA
- Department of MedicineCenter for Metabolism and Mitochondrial MedicineUniversity of PittsburghPAUSA
| | - Iain Scott
- Division of CardiologyDepartment of MedicineUniversity of PittsburghPittsburghPAUSA
- Department of MedicineVascular Medicine InstituteUniversity of PittsburghPittsburghPAUSA
- Department of MedicineCenter for Metabolism and Mitochondrial MedicineUniversity of PittsburghPAUSA
| | - Janet R. Manning
- Division of CardiologyDepartment of MedicineUniversity of PittsburghPittsburghPAUSA
- Department of MedicineVascular Medicine InstituteUniversity of PittsburghPittsburghPAUSA
- Department of MedicineCenter for Metabolism and Mitochondrial MedicineUniversity of PittsburghPAUSA
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14
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El Azzouzi H, Vilaça AP, Feyen DAM, Gommans WM, de Weger RA, Doevendans PAF, Sluijter JPG. Cardiomyocyte Specific Deletion of ADAR1 Causes Severe Cardiac Dysfunction and Increased Lethality. Front Cardiovasc Med 2020; 7:30. [PMID: 32258062 PMCID: PMC7093378 DOI: 10.3389/fcvm.2020.00030] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 02/21/2020] [Indexed: 12/18/2022] Open
Abstract
Background: Adenosine deaminase acting on RNA 1 (ADAR1) is a double-stranded RNA-editing enzyme that is involved in several functions including the deamination of adenosine to inosine, RNA interference (RNAi) mechanisms and microRNA (miRNA) processing, rendering ADAR1 essential for life. Methods and Results: To investigate whether maintenance of ADAR1 expression is required for normal myocardial homeostasis, we bypassed the early embryonic lethality of ADAR1-null mice through the use of a tamoxifen-inducible Cre recombinase under the control of the cardiac-specific α-myosin heavy chain promoter (αMHC). Targeted ADAR1 deletion in adult mice caused a significant increase in lethality accompanied by severe ventricular remodeling and quick and spontaneous cardiac dysfunction, induction of stress markers and overall reduced expression of miRNAs. Administration of a selective inhibitor of the unfolded protein response (UPR) stress significantly blunted the deleterious effects and improved cardiac function thereby prolonging animal survival. In vitro restoring miR-199a-5p levels in cardiomyocytes lacking ADAR1 diminished UPR activation and concomitant apoptosis. Conclusions: Our findings demonstrate an essential role for ADAR1 in cardiomyocyte survival and maintenance of cardiac function through a mechanism that integrates ADAR1 dependent miRNA processing and the suppression of UPR stress.
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Affiliation(s)
- Hamid El Azzouzi
- Laboratory of Experimental Cardiology, Circulatory Health Laboratory, Department of Cardiology, Regenerative Medicine Center, University Medical Center Utrecht, Utrecht, Netherlands.,Department of Molecular Genetics, Erasmus University Medical Center, Rotterdam, Netherlands
| | - Andreia P Vilaça
- Laboratory of Experimental Cardiology, Circulatory Health Laboratory, Department of Cardiology, Regenerative Medicine Center, University Medical Center Utrecht, Utrecht, Netherlands
| | - Dries A M Feyen
- Laboratory of Experimental Cardiology, Circulatory Health Laboratory, Department of Cardiology, Regenerative Medicine Center, University Medical Center Utrecht, Utrecht, Netherlands
| | - Willemijn M Gommans
- Department of Biological Sciences, Lehigh University, Bethlehem, PA, United States
| | - Roel A de Weger
- Department of Pathology, University Medical Center Utrecht, Utrecht, Netherlands
| | - Pieter A F Doevendans
- Laboratory of Experimental Cardiology, Circulatory Health Laboratory, Department of Cardiology, Regenerative Medicine Center, University Medical Center Utrecht, Utrecht, Netherlands.,Interuniversity Cardiology Institute Netherlands, Royal Netherlands Academy of Sciences, Utrecht, Netherlands.,Utrecht University, Utrecht, Netherlands
| | - Joost P G Sluijter
- Laboratory of Experimental Cardiology, Circulatory Health Laboratory, Department of Cardiology, Regenerative Medicine Center, University Medical Center Utrecht, Utrecht, Netherlands.,Interuniversity Cardiology Institute Netherlands, Royal Netherlands Academy of Sciences, Utrecht, Netherlands.,Utrecht University, Utrecht, Netherlands
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15
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Gao X, Wu X, Yan J, Zhang J, Zhao W, DeMarco D, Zhang Y, Bakhos M, Mignery G, Sun J, Li Z, Fill M, Ai X. Transcriptional regulation of stress kinase JNK2 in pro-arrhythmic CaMKIIδ expression in the aged atrium. Cardiovasc Res 2019; 114:737-746. [PMID: 29360953 DOI: 10.1093/cvr/cvy011] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 01/18/2018] [Indexed: 01/02/2023] Open
Abstract
Aims c-jun N-terminal kinase (JNK) is a critical stress response kinase that activates in a wide range of physiological and pathological cellular processes. We recently discovered a pivotal role of JNK in the development of atrial arrhythmias in the aged heart, while cardiac CaMKIIδ, another pro-arrhythmic molecule, was also known to enhance atrial arrhythmogenicity. Here, we aimed to reveal a regulatory role of the stress kinase JNK2 isoform on CaMKIIδ expression. Methods and results Activated JNK2 leads to increased CaMKIIδ protein expression in aged human and mouse atria, evidenced from the reversal of CaMKIIδ up-regulation in JNK2 inhibitor treated wild-type aged mice. This JNK2 action in CaMKIIδ expression was further confirmed in HL-1 myocytes co-infected with AdMKK7D-JNK2, but not when co-infected with AdMKK7D-JNK1. JNK2-specific inhibition (either by a JNK2 inhibitor or overexpression of inactivated dominant-negative JNK2 (JNK2dn) completely attenuated JNK activator anisomycin-induced CaMKIIδ up-regulation in HL-1 myocytes, whereas overexpression of JNK1dn did not. Moreover, up-regulated CaMKIIδ mRNA along with substantially increased phosphorylation of JNK downstream transcription factor c-jun [but not activating transcription factor2 (ATF2)] were exhibited in both aged atria (humans and mice) and transiently JNK activated HL-1 myocytes. Cross-linked chromatin-immunoprecipitation assays (XChIP) revealed that both c-jun and ATF2 were bound to the CaMKIIδ promoter, but significantly increased binding of c-jun only occurred in the presence of anisomycin and JNK inhibition alleviated this anisomycin-elevated c-jun binding. Mutated CaMKII consensus c-jun binding sites impaired its promoter activity. Enhanced transcriptional activity of CaMKIIδ by anisomycin was also completely reversed to the baseline by either JNK2 siRNA or c-jun siRNA knockdown. Conclusion JNK2 activation up-regulates CaMKIIδ expression in the aged atrium. This JNK2 regulation in CaMKIIδ expression occurs at the transcription level through the JNK downstream transcription factor c-jun. The discovery of this novel molecular mechanism of JNK2-regulated CaMKII expression sheds new light on possible anti-arrhythmia drug development.
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Affiliation(s)
- Xianlong Gao
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, IL, USA
| | - Xiaomin Wu
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, IL, USA
| | - Jiajie Yan
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, IL, USA.,Department of Physiology and Biophysics, Rush University Medical Center, Chicago, IL, USA
| | - Jingqun Zhang
- Department of Cardiology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, PR China
| | - Weiwei Zhao
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, IL, USA.,Department of Physiology and Biophysics, Rush University Medical Center, Chicago, IL, USA
| | - Dominic DeMarco
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, IL, USA.,Department of Physiology and Biophysics, Rush University Medical Center, Chicago, IL, USA
| | - Yongguo Zhang
- Department of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Mamdouh Bakhos
- Department of Thoracic & Cardiovascular Surgery, Loyola University Chicago, Maywood, IL, USA
| | - Gregory Mignery
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, IL, USA
| | - Jun Sun
- Department of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Zhenyu Li
- Division of Cardiovascular Medicine, University of Kentucky, KY, USA
| | - Michael Fill
- Department of Physiology and Biophysics, Rush University Medical Center, Chicago, IL, USA
| | - Xun Ai
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, IL, USA.,Department of Physiology and Biophysics, Rush University Medical Center, Chicago, IL, USA
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16
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Yang J, Zhu D, Wen L, Xiang X, Hu J. Gentianella turkestanerum Showed Protective Effects on Hepatic Injury by Modulating the Endoplasmic Reticulum Stress and NF-κB Signaling Pathway. Curr Mol Med 2019; 19:452-460. [PMID: 30987565 DOI: 10.2174/1566524019666190415124838] [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: 12/17/2018] [Revised: 04/03/2019] [Accepted: 04/09/2019] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To investigate the protective effects of Gentianella turkestanerum extraction by butanol (designated as GBA) on hepatic cell line L02 injury induced by carbon tetrachloride (CCl4) and hydrogen peroxide (H2O2). METHODS L02 cells were incubated with 5 µg/mL, 10 µg/mL, 20 µg/mL, 40 µg/mL, 60 µg/mL, 80 µg/mL and 100 µg/mL GBA for 24 hours, and then MTT assay was used to screen the cytotoxicity for GBA. Cells were divided into blank control group, CCl4/H2O2 model group, treated by CCl4 (20 mmol/L) or H2O2 (100 µmol/L); silymarin+CCl4/H2O2 group, treated by CCl4 (20 mmol/L) or H2O2 (100 µmol/L) and 5 µg/mL silymarin; GBA+CCl4/H2O2 group, treated by CCl4 (20 mmol/L) or H2O2 (100 µmol/L) and GBA (5 µg/mL, 10 µg/mL and 20 µg/mL). MTT assay was performed to determine the cellular activity. Malondialdehyde (MDA) content was determined using a commercial kit. The alanine transaminase (ALT), aspartate transaminase (AST) in the supernatant was determined. PE-Annexin V/7-ADD method was utilized to determine the apoptosis of cells. RT-PCR was used to evaluate the expression of endoplasmic reticulum stressrelated genes (CHOP, PERK, IRE1 and ATF6) mRNA. Western blot analysis was performed to determine the expression of CHOP, Caspase 12 and NF-κB protein. RESULTS Cellular survival after GBA (5 µg/mL, 10 µg/mL and 20 µg/mL) incubation was ≥ 75%. After GBA incubation, levels of ALT and AST showed a significant decrease (P < 0.05), while that of the MDA showed a significant decrease (P < 0.05). The apoptosis in the CCl4 or H2O2 group showed a significant increase compared to the control group (P < 0.05). In contrast, GBA-preincubation could attenuate the cellular apoptosis compared to the CCl4 or H2O2 group, which displayed a dose-dependent manner (P < 0.05). The expression of CHOP, PERK, IRE1 and ATF6 mRNA was significantly up-regulated in the presence of CCl4 or H2O2 (P < 0.05). Whereas, GBA induced a significant decrease in these mRNA thereafter (P < 0.05), together with a decrease in CHOP and Caspase 12 proteins (P < 0.05). Besides, it could attenuate the expression of NF-κB p65 in nuclear protein. CONCLUSION G. turkestanerum could inhibit the lipid peroxidation and increase the antioxidant activity. Also, it could inhibit the cellular apoptosis through down-regulating the transcriptional level of ERS related genes and proteins. This process was associated with the nuclear translocation of NF-κB p65 protein.
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Affiliation(s)
- Jianhua Yang
- Department of Pharmacy, The First Affiliated Hospital, Xinjiang Medical University, Urumqi 830011, China
| | - Dandan Zhu
- Department of Pharmacy, The First Affiliated Hospital, Xinjiang Medical University, Urumqi 830011, China
| | - Limei Wen
- Department of Pharmacy, The First Affiliated Hospital, Xinjiang Medical University, Urumqi 830011, China.,College of Pharmacy, Xinjiang Medical University, Urumqi 830011, China
| | - Xueying Xiang
- College of Pharmacy, Xinjiang Medical University, Urumqi 830011, China
| | - Junping Hu
- College of Pharmacy, Xinjiang Medical University, Urumqi 830011, China
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17
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Abstract
Human heart failure is characterized by arrhythmogenic electrical remodeling consisting mostly of ion channel downregulations. Reversing these downregulations is a logical approach to antiarrhythmic therapy, but understanding the pathophysiological mechanisms of the reduced currents is crucial for finding the proper treatments. The unfolded protein response (UPR) is activated by endoplasmic reticulum (ER) stress and has been found to play pivotal roles in different diseases including neurodegenerative diseases, diabetes mellitus, and heart disease. Recently, the UPR is reported to regulate multiple cardiac ion channels, contributing to arrhythmias in heart disease. In this review, we will discuss which UPR modulators and effectors could be involved in regulation of cardiac ion channels in heart disease, and how the understanding of these regulating mechanisms may lead to new antiarrhythmic therapeutics that lack the proarrhythmic risk of current ion channel blocking therapies.
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Affiliation(s)
- Man Liu
- a Division of Cardiology, Department of Medicine, The Lillehei Heart Institute , University of Minnesota at Twin Cities , Minneapolis , USA
| | - Samuel C Dudley
- a Division of Cardiology, Department of Medicine, The Lillehei Heart Institute , University of Minnesota at Twin Cities , Minneapolis , USA
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18
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Targeting the Endoplasmic Reticulum Unfolded Protein Response to Counteract the Oxidative Stress-Induced Endothelial Dysfunction. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:4946289. [PMID: 29725497 PMCID: PMC5872601 DOI: 10.1155/2018/4946289] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 02/18/2018] [Indexed: 12/22/2022]
Abstract
In endothelial cells, the tight control of the redox environment is essential for the maintenance of vascular homeostasis. The imbalance between ROS production and antioxidant response can induce endothelial dysfunction, the initial event of many cardiovascular diseases. Recent studies have revealed that the endoplasmic reticulum could be a new player in the promotion of the pro- or antioxidative pathways and that in such a modulation, the unfolded protein response (UPR) pathways play an essential role. The UPR consists of a set of conserved signalling pathways evolved to restore the proteostasis during protein misfolding within the endoplasmic reticulum. Although the first outcome of the UPR pathways is the promotion of an adaptive response, the persistent activation of UPR leads to increased oxidative stress and cell death. This molecular switch has been correlated to the onset or to the exacerbation of the endothelial dysfunction in cardiovascular diseases. In this review, we highlight the multiple chances of the UPR to induce or ameliorate oxidative disturbances and propose the UPR pathways as a new therapeutic target for the clinical management of endothelial dysfunction.
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19
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Liu M, Shi G, Zhou A, Rupert CE, Coulombe KLK, Dudley SC. Activation of the unfolded protein response downregulates cardiac ion channels in human induced pluripotent stem cell-derived cardiomyocytes. J Mol Cell Cardiol 2018; 117:62-71. [PMID: 29474817 DOI: 10.1016/j.yjmcc.2018.02.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Revised: 02/03/2018] [Accepted: 02/14/2018] [Indexed: 10/18/2022]
Abstract
RATIONALE Heart failure is characterized by electrical remodeling that contributes to arrhythmic risk. The unfolded protein response (UPR) is active in heart failure and can decrease protein levels by increasing mRNA decay, accelerating protein degradation, and inhibiting protein translation. OBJECTIVE Therefore, we investigated whether the UPR downregulated cardiac ion channels that may contribute to arrhythmogenic electrical remodeling. METHODS Human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) were used to study cardiac ion channels. Action potentials (APs) and ion channel currents were measured by patch clamp recording. The mRNA and protein levels of channels and the UPR effectors were determined by quantitative RT-PCR and Western blotting. Tunicamycin (TM, 50 ng/mL and 5 μg/mL), GSK2606414 (GSK, 300 nmol/L), and 4μ8C (5 μmol/L) were utilized to activate the UPR, inhibit protein kinase-like ER kinase (PERK) and inositol-requiring protein-1 (IRE1), respectively. RESULTS TM-induced activation of the UPR caused significant prolongation of the AP duration (APD) and a reduction of the maximum upstroke velocity (dV/dtmax) of the AP phase 0 in both acute (20-24 h) and chronic treatment (6 days). These changes were explained by reductions in the sodium, L-type calcium, the transient outward and rapidly/slowly activating delayed rectifier potassium currents. Nav1.5, Cav1.2, Kv4.3, and KvLQT1 channels showed concomitant reductions in mRNA and protein levels under activated UPR. Inhibition of PERK or IRE1 shortened the APD and reinstated dV/dtmax. The PERK branch regulated Nav1.5, Kv4.3, hERG, and KvLQT1. The IRE1 branch regulated Nav1.5, hERG, KvLQT1, and Cav1.2. CONCLUSIONS Activated UPR downregulates all major cardiac ion currents and results in electrical remodeling in hiPSC-CMs. Both PERK and IRE1 branches downregulate Nav1.5, hERG, and KvLQT1. The PERK branch specifically downregulates Kv4.3, while the IRE1 branch downregulates Cav1.2. Therefore, the UPR contributed to electrical remodeling, and targeting the UPR might be anti-arrhythmic.
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Affiliation(s)
- Man Liu
- Division of Cardiology, Dept. of Medicine, the Lillehei Heart Institute, University of Minnesota, Minneapolis, MN, United States
| | - Guangbin Shi
- Division of Cardiology, Dept. of Medicine, The Warren Alpert School of Medicine, Brown University; Lifespan Cardiovascular Research Center, Providence, RI, United States
| | - Anyu Zhou
- Division of Cardiology, Dept. of Medicine, The Warren Alpert School of Medicine, Brown University; Lifespan Cardiovascular Research Center, Providence, RI, United States
| | - Cassady E Rupert
- Center for Biomedical Engineering, School of Engineering, Brown University, Providence, RI, United States
| | - Kareen L K Coulombe
- Center for Biomedical Engineering, School of Engineering, Brown University, Providence, RI, United States
| | - Samuel C Dudley
- Division of Cardiology, Dept. of Medicine, the Lillehei Heart Institute, University of Minnesota, Minneapolis, MN, United States.
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20
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Wei Z, Weng S, Wang L, Mao Z. Mechanism of Astragalus polysaccharides in attenuating insulin resistance in Rats with type 2 diabetes mellitus via the regulation of liver microRNA‑203a‑3p. Mol Med Rep 2017; 17:1617-1624. [PMID: 29257218 PMCID: PMC5780102 DOI: 10.3892/mmr.2017.8084] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 11/09/2017] [Indexed: 12/19/2022] Open
Abstract
Insulin resistance (IR) is a common feature of type 2 diabetes mellitus (T2DM). Astragalus polysaccharides (APS) is a natural medicine that is used to treat T2DM. However, the mechanism by which APS regulates micro (mi)RNA in the treatment of IR has not been investigated. The purpose of the present study was to investigate differential miRNA expression between normal, T2DM model and APS treatment rats, as well as changes in miRNA and its downstream gene expression levels after APS treatment in T2DM Goto Kakizaki (GK) rats. Results suggested that miRNA (miR)-203a-3p expression level was significantly decreased in the liver of T2DM GK rats. Furthermore, it was identified that glucose-regulated protein (GRP)78 was the target gene of miR-203a-3p. GRP78 mRNA and protein expression levels of GRP78, CAAT-enhancer-binding protein homologous protein (CHOP), phosphorylated-c-Jun N-terminal kinase (pJNK)1, and caspase-12 were significantly increased in the liver of T2DM GK rats. Furthermore, miR-203a-3p was upregulated following APS treatment, and the protein expression levels of GRP78, CHOP, pJNK1 and caspase-12 were significantly decreased. In addition, miR-203a-3p overexpression in IR cells decreased the protein expression levels of these factors and anti-miR-203a-3p produced the opposite result. These findings provided evidence that miR-203a-3p may have a functional role in endoplasmic reticulum stress (ERS) signaling in the liver of T2DM GK rats. In addition, APS attenuated IR in T2DM, likely through upregulating or maintaining the miR-203a-3p expression levels, decreasing GRP78 mRNA and protein expression levels and regulating the protein expression of the ERS signaling pathway.
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Affiliation(s)
- Zitai Wei
- Department of Chemistry of Traditional Chinese Medicine, Medical College, Quzhou College of Technology, Quzhou, Zhejiang 324000, P.R. China
| | - Siying Weng
- Department of Endocrinology, Ningbo Municipal Hospital of TCM, Affiliated Hospital of Zhejiang Chineses Medical University, Ningbo, Zhejiang 315000, P.R. China
| | - Lei Wang
- Department of Clinical Foundation of Chinese Medicine, College of Basic Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Zhujun Mao
- Department of Clinical Foundation of Chinese Medicine, College of Basic Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
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21
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Abstract
The incidence and prevalence of cardiac diseases, which are the main cause of death worldwide, are likely to increase because of population ageing. Prevailing theories about the mechanisms of ageing feature the gradual derailment of cellular protein homeostasis (proteostasis) and loss of protein quality control as central factors. In the heart, loss of protein patency, owing to flaws in genetically-determined design or because of environmentally-induced 'wear and tear', can overwhelm protein quality control, thereby triggering derailment of proteostasis and contributing to cardiac ageing. Failure of protein quality control involves impairment of chaperones, ubiquitin-proteosomal systems, autophagy, and loss of sarcomeric and cytoskeletal proteins, all of which relate to induction of cardiomyocyte senescence. Targeting protein quality control to maintain cardiac proteostasis offers a novel therapeutic strategy to promote cardiac health and combat cardiac disease. Currently marketed drugs are available to explore this concept in the clinical setting.
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Affiliation(s)
- Robert H Henning
- Department of Clinical Pharmacy and Pharmacology, University Medical Centre Groningen, University of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - Bianca J J M Brundel
- Department of Physiology, Amsterdam Cardiovascular Sciences, VU University Medical Center, De Boelelaan 1117, 1081 HZ Amsterdam, The Netherlands
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22
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Rani S, Sreenivasaiah PK, Cho C, Kim DH. Salubrinal Alleviates Pressure Overload-Induced Cardiac Hypertrophy by Inhibiting Endoplasmic Reticulum Stress Pathway. Mol Cells 2017; 40:66-72. [PMID: 28152298 PMCID: PMC5303890 DOI: 10.14348/molcells.2017.2259] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 12/27/2016] [Accepted: 12/30/2016] [Indexed: 01/19/2023] Open
Abstract
Pathological hypertrophy of the heart is closely associated with endoplasmic reticulum stress (ERS), leading to maladaptations such as myocardial fibrosis, induction of apoptosis, and cardiac dysfunctions. Salubrinal is a known selective inhibitor of protein phosphatase 1 (PP1) complex involving dephosphorylation of phospho-eukaryotic translation initiation factor 2 subunit (p-eIF2)-α, the key signaling process in the ERS pathway. In this study, the effects of salubrinal were examined on cardiac hypertrophy using the mouse model of transverse aortic constriction (TAC) and cell model of neonatal rat ventricular myocytes (NRVMs). Treatment of TAC-induced mice with salubrinal (0.5 mg·kg-1·day-1) alleviated cardiac hypertrophy and tissue fibrosis. Salubrinal also alleviated hypertrophic growth in endothelin 1 (ET1)-treated NRVMs. Therefore, the present results suggest that salubrinal may be a potentially efficacious drug for treating pathological cardiac remodeling.
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Affiliation(s)
- Shilpa Rani
- School of Life Sciences, Gwangju Institute of Science and Technology (GIST), Gwangju 61005,
Korea
| | | | - Chunghee Cho
- School of Life Sciences, Gwangju Institute of Science and Technology (GIST), Gwangju 61005,
Korea
| | - Do Han Kim
- School of Life Sciences, Gwangju Institute of Science and Technology (GIST), Gwangju 61005,
Korea
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23
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Salubrinal attenuates right ventricular hypertrophy and dysfunction in hypoxic pulmonary hypertension of rats. Vascul Pharmacol 2016; 87:190-198. [DOI: 10.1016/j.vph.2016.09.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 08/16/2016] [Accepted: 09/23/2016] [Indexed: 11/23/2022]
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24
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Logsdon AF, Lucke-Wold BP, Nguyen L, Matsumoto RR, Turner RC, Rosen CL, Huber JD. Salubrinal reduces oxidative stress, neuroinflammation and impulsive-like behavior in a rodent model of traumatic brain injury. Brain Res 2016; 1643:140-51. [PMID: 27131989 PMCID: PMC5578618 DOI: 10.1016/j.brainres.2016.04.063] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 04/07/2016] [Accepted: 04/26/2016] [Indexed: 02/05/2023]
Abstract
Traumatic brain injury (TBI) is the leading cause of trauma related morbidity in the developed world. TBI has been shown to trigger secondary injury cascades including endoplasmic reticulum (ER) stress, oxidative stress, and neuroinflammation. The link between secondary injury cascades and behavioral outcome following TBI is poorly understood warranting further investigation. Using our validated rodent blast TBI model, we examined the interaction of secondary injury cascades following single injury and how these interactions may contribute to impulsive-like behavior after a clinically relevant repetitive TBI paradigm. We targeted these secondary pathways acutely following single injury with the cellular stress modulator, salubrinal (SAL). We examined the neuroprotective effects of SAL administration on significantly reducing ER stress: janus-N-terminal kinase (JNK) phosphorylation and C/EBP homology protein (CHOP), oxidative stress: superoxide and carbonyls, and neuroinflammation: nuclear factor kappa beta (NFκB) activity, inducible nitric oxide synthase (iNOS) protein expression, and pro-inflammatory cytokines at 24h post-TBI. We then used the more clinically relevant repeat injury paradigm and observed elevated NFκB and iNOS activity. These injury cascades were associated with impulsive-like behavior measured on the elevated plus maze. SAL administration attenuated secondary iNOS activity at 72h following repetitive TBI, and most importantly prevented impulsive-like behavior. Overall, these results suggest a link between secondary injury cascades and impulsive-like behavior that can be modulated by SAL administration.
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Affiliation(s)
- Aric F Logsdon
- Department of Pharmaceutical Sciences, School of Pharmacy, Health Sciences Center, West Virginia University, One Medical Center Drive, Morgantown, WV, United States; Department of Neurosurgery, School of Medicine, West Virginia University, Morgantown, WV, United States; Centers for Neuroscience, School of Medicine, West Virginia University, Morgantown, WV, United States.
| | - Brandon P Lucke-Wold
- Department of Neurosurgery, School of Medicine, West Virginia University, Morgantown, WV, United States; Centers for Neuroscience, School of Medicine, West Virginia University, Morgantown, WV, United States.
| | - Linda Nguyen
- Department of Pharmaceutical Sciences, School of Pharmacy, Health Sciences Center, West Virginia University, One Medical Center Drive, Morgantown, WV, United States.
| | - Rae R Matsumoto
- Dean's Office, College of Pharmacy, Touro University California, Vallejo, CA, United States.
| | - Ryan C Turner
- Department of Neurosurgery, School of Medicine, West Virginia University, Morgantown, WV, United States; Centers for Neuroscience, School of Medicine, West Virginia University, Morgantown, WV, United States.
| | - Charles L Rosen
- Department of Neurosurgery, School of Medicine, West Virginia University, Morgantown, WV, United States; Centers for Neuroscience, School of Medicine, West Virginia University, Morgantown, WV, United States.
| | - Jason D Huber
- Department of Pharmaceutical Sciences, School of Pharmacy, Health Sciences Center, West Virginia University, One Medical Center Drive, Morgantown, WV, United States; Department of Neurosurgery, School of Medicine, West Virginia University, Morgantown, WV, United States; Centers for Neuroscience, School of Medicine, West Virginia University, Morgantown, WV, United States.
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Abstract
Stress-response kinases, the mitogen-activated protein kinases (MAPKs) are activated in response to the challenge of a myriad of stressors. c-Jun N-terminal kinase (JNK), extracellular signal-regulated kinases (ERKs), and p38 MAPKs are the predominant members of the MAPK family in the heart. Extensive studies have revealed critical roles of activated MAPKs in the processes of cardiac injury and heart failure and many other cardiovascular diseases. Recently, emerging evidence suggests that MAPKs also promote the development of cardiac arrhythmias. Thus, understanding the functional impact of MAPKs in the heart could shed new light on the development of novel therapeutic approaches to improve cardiac function and prevent arrhythmia development in the patients. This review will summarize the recent findings on the role of MAPKs in cardiac remodeling and arrhythmia development and point to the critical need of future studies to further elucidate the fundamental mechanisms of MAPK activation and arrhythmia development in the heart.
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Ying R, Wang XQ, Yang Y, Gu ZJ, Mai JT, Qiu Q, Chen YX, Wang JF. Hydrogen sulfide suppresses endoplasmic reticulum stress-induced endothelial-to-mesenchymal transition through Src pathway. Life Sci 2015; 144:208-17. [PMID: 26656263 DOI: 10.1016/j.lfs.2015.11.025] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2015] [Revised: 10/20/2015] [Accepted: 11/24/2015] [Indexed: 01/09/2023]
Abstract
AIMS Hydrogen sulfide (H2S) ameliorates cardiac fibrosis in several models by suppressing endoplasmic reticulum (ER) stress. Endothelial-to-mesenchymal transition (EndMT) is implicated in the development of cardiac fibrosis. Therefore, we investigated whether H2S could attenuate EndMT by suppressing ER stress. MAIN METHODS ER stress was induced by tunicamycin (TM) and thapsigargin (TG) and inhibited by 4-phenylbutyrate (4-PBA) in human umbilical vein endothelial cells (HUVECs). ER stress and EndMT were measured by Western blot, Real-Time PCR and immunofluorescence staining. Inhibition Smad2 and Src pathway were performed by specific inhibitors and siRNA. Ultrastructural examination was detected by transmission electron microscope. The functions of HUVECs were investigated by cell migration assay and tube formation in vitro. KEY FINDINGS Under ER stress, the expression of endothelial marker CD31 significantly decreased while mesenchymal markers α-SMA, vimentin and collagen 1 increased which could be inhibited by 4-PBA. Moreover, HUVECs changed into a fibroblast-like appearance with the activation of Smad2 and Src kinase pathway. After inhibiting Src pathway, EndMT would be significantly inhibited. TM reduced H2S levels in cell lysate and H2S pretreatment could preserve endothelial cell appearance with decreased ER stress and ameliorated dilation of ER. H2S could also downregulate the mesenchymal marker expression, and upregulate the endothelial markers expression, accompanied with the suppression of Src pathway. Moreover, H2S partially restored the capacity of migration and tube formation in HUVECs. SIGNIFICANCE These results revealed that H2S could protect against ER stress-induced EndMT through Src pathway, which may be a novel role for the cardioprotection of H2S.
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Affiliation(s)
- Ru Ying
- Department of Cardiology, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou 510120, People's Republic of China; Guangdong Province Key Laboratory of Arrhythmia and Electrophysiology, Guangzhou 510120, People's Republic of China
| | - Xiao-Qiao Wang
- Department of Anesthesia, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, People's Republic of China
| | - Ying Yang
- Department of Cardiology, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou 510120, People's Republic of China; Guangdong Province Key Laboratory of Arrhythmia and Electrophysiology, Guangzhou 510120, People's Republic of China
| | - Zhen-Jie Gu
- Department of Cardiology, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou 510120, People's Republic of China; Guangdong Province Key Laboratory of Arrhythmia and Electrophysiology, Guangzhou 510120, People's Republic of China
| | - Jing-Ting Mai
- Department of Cardiology, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou 510120, People's Republic of China; Guangdong Province Key Laboratory of Arrhythmia and Electrophysiology, Guangzhou 510120, People's Republic of China
| | - Qiong Qiu
- Department of Cardiology, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou 510120, People's Republic of China; Guangdong Province Key Laboratory of Arrhythmia and Electrophysiology, Guangzhou 510120, People's Republic of China
| | - Yang-Xin Chen
- Department of Cardiology, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou 510120, People's Republic of China; Guangdong Province Key Laboratory of Arrhythmia and Electrophysiology, Guangzhou 510120, People's Republic of China.
| | - Jing-Feng Wang
- Department of Cardiology, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou 510120, People's Republic of China; Guangdong Province Key Laboratory of Arrhythmia and Electrophysiology, Guangzhou 510120, People's Republic of China.
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Wang H, Hu XX, Lu H. Changes of TRB3 and CHOP expression in nonalcoholic fatty liver disease in rats. Shijie Huaren Xiaohua Zazhi 2015; 23:4636-4642. [DOI: 10.11569/wcjd.v23.i29.4636] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the changes of Tribbles related protein 3 (TRB3) and CCAAT/enhancer-binding protein homologous protein (CHOP) expression in nonalcoholic fatty liver disease (NAFLD) in rats.
METHODS: Thirty Wistar rats were randomly divided into a normal control group and an NAFLD group. The rats of the NAFLD group were given a high-fat, high-glucose diet for 16 weeks to induce NAFLD, while the normal control group was given an ordinary diet. The levels of total cholesterol (TC), triglyceride (TG), low-density lipoprotein (LDL) and high-density lipoprotein (HDL) were detected with an automatic biochemical analyzer. The expression of TRB3 and CHOP mRNAs in the liver was detected by real-time quantitative PCR. The expression of TRB3 and CHOP proteins in liver tissue was detected by immunohistochemistry. Cell apoptosis was detected by flow cytometry.
RESULTS: The levels of TC, TG, and LDL in the NAFLD group were significantly higher than those in the normal control group (P < 0.05), while the level of HDL was lower than that in the normal control group (P < 0.05). Compared with the normal group, levels of TRB3 and CHOP mRNAs and proteins in the NAFLD group were significantly increased (mRNA: P < 0.05 or P < 0.01; protein: P < 0.01). Flow cytometry analysis showed that the apoptosis in the NAFLD group was higher than that in the normal control group.
CONCLUSION: The changes of TRB3 and CHOP expression may play important roles in the development of NAFLD.
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Wang H, Hu XX, Lu H. Change of protein kinase R-like endoplasmic reticulum kinase/eukaryotic translation initiator factor-2α signaling pathway in nonalcoholic fatty liver disease in rats. Shijie Huaren Xiaohua Zazhi 2015; 23:4155-4161. [DOI: 10.11569/wcjd.v23.i26.4155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To observe the change of the protein kinase R-like endoplasmic reticulum kinase/eukaryotic translation initiator factor-2α (PERK/eIF-2α) signaling pathway in nonalcoholic fatty liver disease (NAFLD) and to discuss the possible clinical significance.
METHODS: Thirty Wistar rats were randomly and equally divided into two groups: a normal control group (group 1) and an NAFLD group (group 2). NAFLD was induced by feeding a high-fat, high-glucose diet for 16 wk, and group 1 was given an ordinary diet at the same time. Serum levels of total cholesterol (TC), triglyeride (TG), low-density lipoprotein (LDL) and high-density lipoprotein (HDL) were measured in all rats. The mRNA expression of PERK, eIF-2α, C/EBP homology protein (CHOP) and glucose regulated protein 78 kDa (GRP78) in the liver was detected by real-time PCR, while Western blot was used to detect the expression of p-PERK, p-eIF-2α, CHOP and GRP78 proteins. Cell apoptosis was tested by flow cytometry.
RESULTS: Levels of TC, TG, and LDL in group 1 were significantly higher than those in group 2 (P < 0.05), but the level of HDL was significantly lower in group 1 (P < 0.05). Compared with group 1, the expression of p-PERK, p-eIF-2α, CHOP and GRP78 protein in group 2 was significantly increased (P < 0.05), and the expression of PERK, eIF-2α, CHOP and GRP78 mRNAs was also significantly elevated in group 2 (P < 0.05 or P < 0.01). Flow cytometry analysis suggested that apoptosis in group 2 was increased.
CONCLUSION: The PERK/eIF-2α signaling pathway is involved in the development and progression of NAFLD, which may cause endoplasmic reticulum stress and induce apoptosis.
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Zhang X, Sha M, Yao Y, Da J, Jing D. Increased B-type-natriuretic peptide promotes myocardial cell apoptosis via the B-type-natriuretic peptide/long non-coding RNA LSINCT5/caspase-1/interleukin 1β signaling pathway. Mol Med Rep 2015; 12:6761-7. [PMID: 26323562 PMCID: PMC4626192 DOI: 10.3892/mmr.2015.4247] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 08/06/2015] [Indexed: 01/23/2023] Open
Abstract
Chronic heart failure (CHF) is the final stage of various heart diseases, and is increasingly recognized as a major health problem in the elderly. Previous studies demonstrated that B-type-natriuretic peptide (BNP) is an established biomarker of CHF. Furthermore, BNP also regulates cell proliferation, differentiation and apoptosis. Recent evidence has revealed that BNP affects myocardial cell apoptosis during myocardial ischemia-reperfusion injury. Long non-coding RNAs (lncRNAs) are emerging as novel molecular compounds involved in gene regulation, and have important roles in numerous human diseases. However, the mechanism underlying the BNP and lncRNA-induced regulation of myocardial cell apoptosis remains to be elucidated. The present study reported that lncRNA LSINCT5, upregulated by BNP, is able to regulate myocardial cell apoptosis via the activation of the caspase-1/interleukin (IL)-1β signaling pathway. BNP-induced apoptosis of HCM cells was observed using flow cytometry, and involved caspase-1. In addition, expression profiling using a human lncRNA polymerase chain reaction array revealed that LSINCT5 was highly expressed in BNP-treated myocardial cells, as compared with untreated cells. The role of lncRNA LSINCT5 in HCM cell apoptosis was also investigated. The results of the present study indicated that LSINCT5 silencing by small interfering RNA inhibits caspase-1/IL-1β signaling, and suppresses apoptosis in BNP-treated HCM cells. Therefore, high expression levels of BNP promote the apoptosis of myocardial cells through the lncRNA LSINCT5 mediator, which activates the caspase-1/IL-1β signaling pathway. These findings uncovered a novel pathogenic mechanism, and provided a potential therapeutic target for CHF.
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Affiliation(s)
- Xian Zhang
- Department of Geriatrics, Shanghai First People's Hospital, Shanghai 200080, P.R. China
| | - Minglei Sha
- Department of Geriatrics, Shanghai First People's Hospital, Shanghai 200080, P.R. China
| | - Yuting Yao
- Department of Geriatrics, Shanghai First People's Hospital, Shanghai 200080, P.R. China
| | - Jia Da
- Department of Geriatrics, Shanghai First People's Hospital, Shanghai 200080, P.R. China
| | - Dadao Jing
- Department of Geriatrics, Shanghai First People's Hospital, Shanghai 200080, P.R. China
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Guo R, Liu W, Liu B, Zhang B, Li W, Xu Y. SIRT1 suppresses cardiomyocyte apoptosis in diabetic cardiomyopathy: An insight into endoplasmic reticulum stress response mechanism. Int J Cardiol 2015; 191:36-45. [PMID: 25965594 DOI: 10.1016/j.ijcard.2015.04.245] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 04/05/2015] [Accepted: 04/30/2015] [Indexed: 02/08/2023]
Abstract
BACKGROUND Endoplasmic reticulum (ER) stress-dependent apoptosis had been shown to occur in the hearts of people with diabetes, although the exact mechanisms are unclear. Sirtuin 1 (SIRT1), a nicotinamide adenine dinucleotide NAD(+)-dependent deacetylase, is known to play a role in diabetes-related complications as well as ER-stress. Therefore, we investigated the relationship between Sirtuin 1 (SIRT1) and ER stress-induced apoptosis in H9C2 cardiomyocyte. METHODS Diabetic rats were established by a single intraperitoneal injection of streptozotocin (STZ; 50mg/kg) with high-fat diet. For in vitro analysis, rat derived H9C2 cardiomyocytes were cultured. Cardiac function was assessed by Doppler, and SIRT1 as well as ER stress related protein expressions were measured by immunohistochemistry and western blotting. Cultured cells were exposed to advanced glycation end products (AGEs) (400μg/mL) for inducing ER stress and apoptosis. Cell apoptosis were detected by flow cytometry. RESULTS In vivo, ER stress was enhanced in the cardiomyocytes of diabetic rats without any treatments. A SIRT1 activator, resveratrol, could significantly restore cardiac function, reduce cardiomyocyte apoptosis, and ameliorate ER stress. In vitro, we showed that apoptosis and ER stress increased after AGE stimulation when SIRT1 expression was downregulated by short interfering RNA (siRNA) (p<0.05). However, resveratrol (10μM) restored SIRT1 levels in cardiomyocytes and markedly reduced ER stress-mediated apoptosis. CONCLUSION SIRT1 may attenuate ER stress-induced cardiomyocyte apoptosis via PERK/eIF2α, ATF6/CHOP, and IRE1α/JNK-mediated pathways. This study may provide insights into a novel underlying mechanism and a strategy for treating diabetic cardiomyopathy.
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Affiliation(s)
- Rong Guo
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, PR China; Wadsworth Center, New York State Department of Health, Albany, NY 12201, USA.
| | - Weijing Liu
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, PR China
| | - Baoxin Liu
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, PR China
| | - Buchun Zhang
- Department of Cardiology, the Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu 221002, PR China
| | - Weiming Li
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, PR China
| | - Yawei Xu
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, PR China.
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Li RJ, He KL, Li X, Wang LL, Liu CL, He YY. Salubrinal protects cardiomyocytes against apoptosis in a rat myocardial infarction model via suppressing the dephosphorylation of eukaryotic translation initiation factor 2α. Mol Med Rep 2015; 12:1043-9. [PMID: 25816071 PMCID: PMC4438964 DOI: 10.3892/mmr.2015.3508] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 02/19/2015] [Indexed: 01/04/2023] Open
Abstract
The aim of the present study was to examine the role of eIF2α in cardiomyocyte apoptosis and evaluate the cardioprotective role of salubrinal in a rat myocardial infarction (MI) model. Rat left anterior descending coronary arteries were ligated and the classical proteins involved in the endoplasmic reticulum stress (ERS)-induced apoptotic pathway were analyzed using quantitative polymerase chain reaction and western blot analysis. Salubrinal was administered to the rats and cardiomyocyte apoptosis and infarct size were evaluated by a specific staining method. Compared with the sham surgery group, the rate of cardiomyocyte apoptosis in the MI group was increased with the development of the disease. It was also demonstrated that the mRNA and protein levels of GRP78, caspase-12, CHOP and the protein expression of p-eIF2α were increased in the MI group. Furthermore, the results showed that treatment with salubrinal can decrease cardiomyocyte apoptosis and infarct size by increasing eIF2α phosphorylation and decreasing the expression of caspase-12 and CHOP. The present study suggests that salubrinal protects against ER stress-induced rat cadiomyocyte apoptosis via suppressing the dephosphorylation of eIF2α in the ERS-associated pathway.
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Affiliation(s)
- Rui-Jun Li
- Department of Cardiology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Kun-Lun He
- Department of Cardiology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Xin Li
- Department of Cardiology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Li-Li Wang
- Beijing Institute of Pharmacology and Toxicology, Beijing 100850, P.R. China
| | - Chun-Lei Liu
- Department of Cardiology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Yun-Yun He
- Department of Cardiology, Chinese PLA General Hospital, Beijing 100853, P.R. China
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Ai X. SR calcium handling dysfunction, stress-response signaling pathways, and atrial fibrillation. Front Physiol 2015; 6:46. [PMID: 25745402 PMCID: PMC4333799 DOI: 10.3389/fphys.2015.00046] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Accepted: 01/30/2015] [Indexed: 12/19/2022] Open
Abstract
Atrial fibrillation (AF) is the most common sustained arrhythmia. It is associated with a markedly increased risk of premature death due to embolic stroke and also complicates co-existing cardiovascular diseases such as heart failure. The prevalence of AF increases dramatically with age, and aging has been shown to be an independent risk of AF. Due to an aging population in the world, a growing body of AF patients are suffering a diminished quality of life and causing an associated economic burden. However, effective pharmacologic treatments and prevention strategies are lacking due to a poor understanding of the molecular and electrophysiologic mechanisms of AF in the failing and/or aged heart. Recent studies suggest that altered atrial calcium handling contributes to the onset and maintenance of AF. Here we review the role of stress-response kinases and calcium handling dysfunction in AF genesis in the aged and failing heart.
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Affiliation(s)
- Xun Ai
- Department of Cell and Molecular Physiology, Loyola University Chicago Maywood, IL, USA
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33
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Effects of PP1-12, a Novel Protein Phosphatase-1 Inhibitor, on Ventricular Function and Remodeling After Myocardial Infarction in Rats. J Cardiovasc Pharmacol 2014; 64:360-7. [DOI: 10.1097/fjc.0000000000000128] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Yong J, Grankvist N, Han J, Kaufman RJ. Eukaryotic translation initiation factor 2 α phosphorylation as a therapeutic target in diabetes. Expert Rev Endocrinol Metab 2014; 9:345-356. [PMID: 30763994 DOI: 10.1586/17446651.2014.927309] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Regulation of mRNA translation is of vital importance for a cell to adapt to environmental changes. To serve this purpose, intricate mechanisms controlling mRNA translation have evolved, of which the eukaryotic initiation factors eIF2 and eIF4 represent essential regulatory nodes for both stress sensing and signal transduction. Stress sensing by eIF2 α subunit (eIF2α) kinases, translation regulation by eIF2α subunit phosphorylation and subsequent dephosphorylation constitute a core molecular switch for stress adaptation and rapid metabolic regulation. It is not surprising; therefore, that dysfunction of such a pathway is implicated in human disease, especially metabolic syndrome and diabetes. In theory, therapeutic intervention to target the eIF2α phosphorylation pathway provides a promising therapeutic solution to tackle this debilitating syndrome. Careful evaluation of such therapies is crucially needed considering the central role of eIF2α pathway in cellular function for every organ.
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Affiliation(s)
| | | | - Jaeseok Han
- a Degenerative Diseases Program, Sanford|Burnham Medical Research Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA
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Logsdon AF, Turner RC, Lucke-Wold BP, Robson MJ, Naser ZJ, Smith KE, Matsumoto RR, Huber JD, Rosen CL. Altering endoplasmic reticulum stress in a model of blast-induced traumatic brain injury controls cellular fate and ameliorates neuropsychiatric symptoms. Front Cell Neurosci 2014; 8:421. [PMID: 25540611 PMCID: PMC4261829 DOI: 10.3389/fncel.2014.00421] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Accepted: 11/20/2014] [Indexed: 02/05/2023] Open
Abstract
Neuronal injury following blast-induced traumatic brain injury (bTBI) increases the risk for neuropsychiatric disorders, yet the pathophysiology remains poorly understood. Blood-brain-barrier (BBB) disruption, endoplasmic reticulum (ER) stress, and apoptosis have all been implicated in bTBI. Microvessel compromise is a primary effect of bTBI and is postulated to cause subcellular secondary effects such as ER stress. What remains unclear is how these secondary effects progress to personality disorders in humans exposed to head trauma. To investigate this we exposed male rats to a clinically relevant bTBI model we have recently developed. The study examined initial BBB disruption using Evan's blue (EB), ER stress mechanisms, apoptosis and impulsive-like behavior measured with elevated plus maze (EPM). Large BBB openings were observed immediately following bTBI, and persisted for at least 6 h. Data showed increased mRNA abundance of stress response genes at 3 h, with subsequent increases in the ER stress markers C/EBP homologous protein (CHOP) and growth arrest and DNA damage-inducible protein 34 (GADD34) at 24 h. Caspase-12 and Caspase-3 were both cleaved at 24 h following bTBI. The ER stress inhibitor, salubrinal (SAL), was administered (1 mg/kg i.p.) to investigate its effects on neuronal injury and impulsive-like behavior associated with bTBI. SAL reduced CHOP protein expression, and diminished Caspase-3 cleavage, suggesting apoptosis attenuation. Interestingly, SAL also ameliorated impulsive-like behavior indicative of head trauma. These results suggest SAL plays a role in apoptosis regulation and the pathology of chronic disease. These observations provide evidence that bTBI involves ER stress and that the unfolded protein response (UPR) is a promising molecular target for the attenuation of neuronal injury.
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Affiliation(s)
- Aric Flint Logsdon
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia UniversityMorgantown, WV, USA
- Center for Neuroscience, Health Sciences Center, West Virginia University, MorgantownWV, USA
- Department of Neurosurgery, School of Medicine, West Virginia University, MorgantownWV, USA
| | - Ryan Coddington Turner
- Center for Neuroscience, Health Sciences Center, West Virginia University, MorgantownWV, USA
- Department of Neurosurgery, School of Medicine, West Virginia University, MorgantownWV, USA
| | - Brandon Peter Lucke-Wold
- Center for Neuroscience, Health Sciences Center, West Virginia University, MorgantownWV, USA
- Department of Neurosurgery, School of Medicine, West Virginia University, MorgantownWV, USA
| | - Matthew James Robson
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia UniversityMorgantown, WV, USA
- Department of Pharmacology, School of Medicine, Vanderbilt UniversityNashville, TN, USA
| | - Zachary James Naser
- Department of Neurosurgery, School of Medicine, West Virginia University, MorgantownWV, USA
| | - Kelly Elizabeth Smith
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia UniversityMorgantown, WV, USA
| | - Rae Reiko Matsumoto
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia UniversityMorgantown, WV, USA
- Dean’s Office, College of Pharmacy, Touro University CaliforniaVallejo, CA, USA
| | - Jason Delwyn Huber
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia UniversityMorgantown, WV, USA
- Center for Neuroscience, Health Sciences Center, West Virginia University, MorgantownWV, USA
- Department of Neurosurgery, School of Medicine, West Virginia University, MorgantownWV, USA
| | - Charles Lee Rosen
- Center for Neuroscience, Health Sciences Center, West Virginia University, MorgantownWV, USA
- Department of Neurosurgery, School of Medicine, West Virginia University, MorgantownWV, USA
- *Correspondence: Charles Lee Rosen, Department of Neurosurgery, School of Medicine, West Virginia University, One Medical Center Drive, Suite 4300, Health Sciences Center, PO Box 9183, Morgantown, WV 26506-9183, USA e-mail:
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