1
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Chen Q, Thompson J, Hu Y, Lesnefsky EJ. Endoplasmic reticulum stress and alterations of peroxiredoxins in aged hearts. Mech Ageing Dev 2023; 215:111859. [PMID: 37661065 PMCID: PMC11103240 DOI: 10.1016/j.mad.2023.111859] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 08/20/2023] [Accepted: 08/29/2023] [Indexed: 09/05/2023]
Abstract
Aging-related cardiovascular disease is influenced by multiple factors, with oxidative stress being a key contributor. Aging-induced endoplasmic reticulum (ER) stress exacerbates oxidative stress by impairing mitochondrial function. Furthermore, a decline in antioxidants, including peroxiredoxins (PRDXs), augments the oxidative stress during aging. To explore if ER stress leads to PRDX degradation during aging, young adult (3 mo.) and aged (24 mo.) male mice were studied. Treatment with 4-phenylbutyrate (4-PBA) was used to alleviate ER stress in young adult and aged mice. Aged hearts showed elevated oxidative stress levels compared to young hearts. However, treatment with 4-PBA to attenuate ER stress reduced oxidative stress in aged hearts, indicating that ER stress contributes to increased oxidative stress in aging. Moreover, aging resulted in reduced levels of peroxiredoxin 3 (PRDX3) in mitochondria and peroxiredoxin 4 (PRDX4) in myocardium. While 4-PBA treatment improved PRDX3 content in aged hearts, it did not restore PRDX4 content in aged mice. These findings suggest that ER stress not only leads to mitochondrial dysfunction and increased oxidant stress but also impairs a vital antioxidant defense through decreased PRDX3 content. Additionally, the results suggest that PRDX4 may contribute an upstream role in inducing ER stress during aging.
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Affiliation(s)
- Qun Chen
- Departments of Medicine (Division of Cardiology), Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Jeremy Thompson
- Departments of Medicine (Division of Cardiology), Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Ying Hu
- Departments of Medicine (Division of Cardiology), Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Edward J Lesnefsky
- Departments of Medicine (Division of Cardiology), Virginia Commonwealth University, Richmond, VA 23298, USA; Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, VA 23298, USA; Physiology and Biophysics, Virginia Commonwealth University, Richmond, VA 23298, USA; Richmond Department of Veterans Affairs Medical Center, Richmond, VA 23249, USA.
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2
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Tiwari S, Gupta P, Singh A, Chaturvedi S, Wahajuddin M, Mishra A, Singh S. 4-Phenylbutyrate Mitigates the Motor Impairment and Dopaminergic Neuronal Death During Parkinson's Disease Pathology via Targeting VDAC1 Mediated Mitochondrial Function and Astrocytes Activation. Neurochem Res 2022; 47:3385-3401. [PMID: 35922743 DOI: 10.1007/s11064-022-03691-0] [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: 03/02/2022] [Revised: 06/15/2022] [Accepted: 07/12/2022] [Indexed: 10/16/2022]
Abstract
Parkinson's disease (PD) is a progressive motor neurodegenerative disorder significantly associated with protein aggregation related neurodegenerative mechanisms. In view of no disease modifying drugs, the present study was targeted to investigate the therapeutic effects of pharmacological agent 4-phenylbutyric acid (4PBA) in PD pathology. 4PBA is an FDA approved monocarboxylic acid with inhibitory activity towards histone deacetylase and clinically treats urea cycle disorder. First, we observed the significant protective effects of 4PBA on PD specific neuromuscular coordination, level of tyrosine hydroxylase, α-synuclein level and neurotransmitter dopamine in both substantia nigra and striatal regions of the experimental rat model of PD. Further results revealed that treatment with 4PBA drug exhibited significant protection against disease related oxidative stress and augmented nitrite levels. The disease pathology-related depletion in mitochondrial membrane potential and augmented level of calcium as well as mitochondrion membrane located VDAC1 protein level and cytochrome-c translocation were also significantly attenuated with 4PBA administration. Inhibited neuronal apoptosis and restored neuronal morphology were also observed with 4PBA treatment as measured by level of pro-apoptotic proteins t-Bid, Bax and cleaved caspase-3 along with cresyl violet staining in both substantia nigra and striatal regions. Lastly, PD-linked astrocyte activation was significantly inhibited with 4PBA treatment. Altogether, our findings suggest that 4PBA exerts broad-spectrum neuroprotective effects in PD animal model.
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Affiliation(s)
- Shubhangini Tiwari
- Division of Neuroscience and Ageing Biology, Division of Toxicology and Experimental Medicine, CSIR-Central Drug Research Institute, Lucknow, 226031, India
| | - Parul Gupta
- Division of Neuroscience and Ageing Biology, Division of Toxicology and Experimental Medicine, CSIR-Central Drug Research Institute, Lucknow, 226031, India.,Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, India
| | - Abhishek Singh
- Division of Neuroscience and Ageing Biology, Division of Toxicology and Experimental Medicine, CSIR-Central Drug Research Institute, Lucknow, 226031, India.,Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, India
| | - Swati Chaturvedi
- Division of Pharmaceutics & Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, 226031, India
| | - M Wahajuddin
- Division of Pharmaceutics & Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, 226031, India
| | - Amit Mishra
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology, Jodhpur, Rajasthan, 342011, India
| | - Sarika Singh
- Division of Neuroscience and Ageing Biology, Division of Toxicology and Experimental Medicine, CSIR-Central Drug Research Institute, Lucknow, 226031, India. .,Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, India.
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3
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Rathor R, Suryakumar G, Singh SN. Diet and redox state in maintaining skeletal muscle health and performance at high altitude. Free Radic Biol Med 2021; 174:305-320. [PMID: 34352371 DOI: 10.1016/j.freeradbiomed.2021.07.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 07/14/2021] [Accepted: 07/19/2021] [Indexed: 01/07/2023]
Abstract
High altitude exposure leads to compromised physical performance with considerable weight loss. The major stressor at high altitude is hypobaric hypoxia which leads to disturbance in redox homeostasis. Oxidative stress is a well-known trigger for many high altitude illnesses and regulates several key signaling pathways under stressful conditions. Altered redox homeostasis is considered the prime culprit of high altitude linked skeletal muscle atrophy. Hypobaric hypoxia disturbs redox homeostasis through increased RONS production and compromised antioxidant system. Increased RONS disturbs the cellular homeostasis via multiple ways such as inflammation generation, altered protein anabolic pathways, redox remodeling of RyR1 that contributed to dysregulated calcium homeostasis, enhanced protein degradation pathways via activation calcium-regulated protein, calpain, and apoptosis. Ultimately, all the cellular signaling pathways aggregately result in skeletal muscle atrophy. Dietary supplementation of phytochemicals could become a safe and effective intervention to ameliorate skeletal muscle atrophy and enhance the physical performance of the personnel who are staying at high altitude regions. The present evidence-based review explores few dietary supplementations which regulate several signaling mechanisms and ameliorate hypobaric hypoxia induced muscle atrophy and enhances physical performance. However, a clinical research trial is required to establish proof-of-concept.
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Affiliation(s)
- Richa Rathor
- Defence Institute of Physiology and Allied Sciences, Lucknow Road, Timarpur, New Delhi, 110054, India.
| | - Geetha Suryakumar
- Defence Institute of Physiology and Allied Sciences, Lucknow Road, Timarpur, New Delhi, 110054, India
| | - Som Nath Singh
- Defence Institute of Physiology and Allied Sciences, Lucknow Road, Timarpur, New Delhi, 110054, India
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4
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Tenzing N, van Patot MT, Liu H, Xu Q, Liu J, Wang Z, Wang Y, Wuren T, Ge RL. Identification of a miRNA-mRNA Regulatory Networks in Placental Tissue Associated With Tibetan High Altitude Adaptation. Front Genet 2021; 12:671119. [PMID: 34567059 PMCID: PMC8460760 DOI: 10.3389/fgene.2021.671119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 07/30/2021] [Indexed: 11/15/2022] Open
Abstract
The Tibetan population has lived and successfully reproduced at high altitude for many generations. Studies have shown that Tibetans have various mechanisms for protection against high-altitude hypoxia, which are probably due, at least in part, to placental adaptation. However, comprehensive in silico analyses of placentas in Tibetans are lacking. We performed a microarray-based comparative transcriptome analysis of 10 Tibetan women from Yushu, Qinghai, CHN (∼3,780 m) and 10 European women living in Leadville, CO, United States (∼3,100 m) for less than three generations. Expression of HIF-1α, STAT3, EGFR, HSP5A, XBP1, and ATF6A mRNA was less in the Tibetan placentas as compared with European placentas. A total of 38 miRNAs were involved in regulating these genes. Differentially expressed genes were enriched for HIF1α signaling pathways, protein processing in the endoplasmic reticulum, PI3K-AKT signaling pathways, and MAPK signaling pathways. Based on the transcriptome profiles, the Tibetan population was distinct from the European population; placental tissues from the Tibetan population are lacking hypoxic responses, and “passivation” occurs in response to hypoxic stress. These results provide insights into the molecular signature of adaptation to high altitudes in these two populations.
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Affiliation(s)
- Noryung Tenzing
- Research Center for High Altitude Medicine, Qinghai University, Xining, China.,Key Laboratory for Application of High Altitude Medicine, Qinghai University, Xining, China.,Clinical Department, Qinghai University Affiliated Hospital, Xining, China
| | | | - Huifang Liu
- Research Center for High Altitude Medicine, Qinghai University, Xining, China.,Key Laboratory for Application of High Altitude Medicine, Qinghai University, Xining, China.,Clinical Department, Qinghai University Affiliated Hospital, Xining, China
| | - Qiying Xu
- Research Center for High Altitude Medicine, Qinghai University, Xining, China.,Key Laboratory for Application of High Altitude Medicine, Qinghai University, Xining, China.,Clinical Department, Qinghai University Affiliated Hospital, Xining, China
| | - Juanli Liu
- Research Center for High Altitude Medicine, Qinghai University, Xining, China.,Key Laboratory for Application of High Altitude Medicine, Qinghai University, Xining, China.,Qinghai Provincial People's Hospital, Xining, China
| | - Zhuoya Wang
- Research Center for High Altitude Medicine, Qinghai University, Xining, China.,Key Laboratory for Application of High Altitude Medicine, Qinghai University, Xining, China.,Clinical Department, Qinghai University Affiliated Hospital, Xining, China
| | - Yanjun Wang
- Research Center for High Altitude Medicine, Qinghai University, Xining, China.,Key Laboratory for Application of High Altitude Medicine, Qinghai University, Xining, China.,Clinical Department, Qinghai University Affiliated Hospital, Xining, China
| | - Tana Wuren
- Research Center for High Altitude Medicine, Qinghai University, Xining, China.,Key Laboratory for Application of High Altitude Medicine, Qinghai University, Xining, China
| | - Ri-Li Ge
- Research Center for High Altitude Medicine, Qinghai University, Xining, China.,Key Laboratory for Application of High Altitude Medicine, Qinghai University, Xining, China
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Liu Z, Liao T, Yang N, Ding L, Li X, Wu P, Wang P. Interventional Efects of the Topical of "Sanse Powder" Essential Oils Nanoemulsion on Knee Osteoarthritis in Rats by Targeting the ERS/TXNIP/NLRP3 Signaling Axis. Front Pharmacol 2021; 12:739644. [PMID: 34539417 PMCID: PMC8443772 DOI: 10.3389/fphar.2021.739644] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Accepted: 08/23/2021] [Indexed: 11/13/2022] Open
Abstract
Purpose: Our recent research is dedicated to finding effective drugs for the treatment of knee osteoarthritis (KOA) from traditional Chinese medicine and trying to make full use of modern science and technology to uncover the mechanisms and targets behind them. Synovial inflammation is one of the key pathological features of KOA, and a growing number of researchers realize that early intervention of synovial inflammation may be able to reverse disease progression. The close association of traditional natural products with modern nanotechnology may be important for improving the anti-synovitis efficacy. The purpose of our research was to explore the anti-synovitis mechanism of NEs-SP-EO that might be associated with the ERS/TXNIP/NLRP3 signalling axis. Methods: Chemical composition of "Sanse Powder" essential oil (SP-EO) and NEs-SP-EO were analyzed by GC-MS. NEs-SP-EO were prepared and characterized by nanoparticle tracking analysis, polydispersity index (PDI), zeta potential (ZP), ultraviolet-visible spectroscopy, and transmission electronic microscopy. The CCK8 assay for cell viability of NEs-SP-EO was performed on fibroblast-like synovial cells (FLSs) and the inflammatory environment was stimulated by LPS to explore the therapeutic mechanisms in vitro. Experiments of NEs-SP-EO in vivo were performed in male SD rats. Results: The GC-MS results showed that 30 compounds were present in SP-EO and 11 components of NEs-SP-EO were identified. The results also showed that the formulation of NEs-SP-EO exhibited suitable particle size, negative charge, and stable system. In vitro and vivo testing, NEs-SP-EO produced anti-synovitis efficacy by reduced the induction of the ERS/TXNIP/NLRP3 signaling axis as well as regulating the overproduction of IL-1β, IL-18. Conclusion: We have developed a new type of essential oil nanoemulsion from "Sanse Powder" and demonstrated that it can managing synovitis of KOA. Besides, we have initially explored the anti-inflammatory mechanism that may be related to the ERS/TXNIP/NLRP3 signaling axis.
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Affiliation(s)
- Zixiu Liu
- Department of Orthopedics, The Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China.,Jiangsu Province Hospital of Chinese Medicine, Nanjing, China
| | - Taiyang Liao
- Department of Orthopedics, The Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China.,Jiangsu Province Hospital of Chinese Medicine, Nanjing, China.,Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Nan Yang
- Department of Orthopedics, The Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China.,Jiangsu Province Hospital of Chinese Medicine, Nanjing, China.,Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Liang Ding
- Department of Orthopedics, The Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China.,Jiangsu Province Hospital of Chinese Medicine, Nanjing, China
| | - Xiaochen Li
- Department of Orthopedics, The Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China.,Jiangsu Province Hospital of Chinese Medicine, Nanjing, China.,Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Peng Wu
- Department of Orthopedics, The Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China.,Jiangsu Province Hospital of Chinese Medicine, Nanjing, China.,Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Peimin Wang
- Department of Orthopedics, The Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China.,Jiangsu Province Hospital of Chinese Medicine, Nanjing, China
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6
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Liu C, Chen X, Guo G, Xu X, Li X, Wei Q, Shen Y, Li H, Hao J, Tian YP, He K. Effects of Intermittent Normoxia on Chronic Hypoxic Pulmonary Hypertension and Right Ventricular Hypertrophy in Rats. High Alt Med Biol 2021; 22:184-192. [PMID: 33989063 DOI: 10.1089/ham.2020.0110] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Liu, Chunlei, Xu Chen, Ge Guo, Xiang Xu, Xin Li, Qingxia Wei, Yanying Shen, Hanlu Li, Jianxiu Hao, Ya Ping Tian, and Kunlun He. Effects of intermittent normoxia on chronic hypoxic pulmonary hypertension and right ventricular hypertrophy in rats. High Alt Med Biol. 22: 184-192, 2021. Background: Individuals with chronically low arterial oxygen tension owing to high altitude develop elevated rates of pulmonary hypertension (PH) and right ventricular (RV) hypertrophy. However, the effects of the frequency and duration of normoxic exposure on PH and RV hypertrophy have not been adequately assessed; thus, we aimed to analyze the same. Materials and Methods: PH and RV hypertrophy were induced in 60 rats using a hypobaric chamber. Of these 60 rats, every 10 were exposed to normoxic conditions for 30 minutes once (1T/D), three times (3T/D), or five times daily (5T/D), or for one 150-minute recovery daily (1LT/D). Furthermore, 10 rats were housed in a normoxic environment, and another 10 were subjected to continuous hypoxia. After 4 weeks, hemodynamic measurements were recorded, and the hearts were harvested for pathomorphological observations. Results: Average pulmonary arterial pressures (PAP) of control rats and those exposed to hypobaric hypoxia were 14.1 and 32.3 mmHg, respectively. After 30 minutes of exposure to normoxia 3T/D, 5T/D, or 1LT/D, PAP values were reduced to 27.1, 27.9, or 26.8 mmHg, respectively. Four weeks of hypoxic exposure elevated the RV/heart weight (HW) ratios, while exposure to normoxia 3T/D, 5T/D, and 1LT/D significantly reduced RV/HW. In addition, exposure to normoxia 3T/D, 5T/D, 1LT/D reduced the percentage wall thickness of the pulmonary artery as well as the hypertrophy indices of atrial natriuretic peptide, brain natriuretic peptide, and myosin heavy chain 7 (MYH-7). Conclusions: Thirty-minute exposure to normoxic conditions of 3T/D, 5T/D, or 1LT/D effectively ameliorates PH and RV thickening.
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Affiliation(s)
- Chunlei Liu
- Transformation Medicine Centre, Chinese PLA General Hospital, Beijing, China.,Beijing Key Laboratory of Chronic Heart Failure Precision Medicine, Chinese PLA General Hospital, Beijing, China
| | - Xu Chen
- Transformation Medicine Centre, Chinese PLA General Hospital, Beijing, China
| | - Ge Guo
- Transformation Medicine Centre, Chinese PLA General Hospital, Beijing, China
| | - Xiang Xu
- Transformation Medicine Centre, Chinese PLA General Hospital, Beijing, China
| | - Xin Li
- Transformation Medicine Centre, Chinese PLA General Hospital, Beijing, China.,Beijing Key Laboratory of Chronic Heart Failure Precision Medicine, Chinese PLA General Hospital, Beijing, China
| | - Qingxia Wei
- Transformation Medicine Centre, Chinese PLA General Hospital, Beijing, China
| | - Yanying Shen
- Transformation Medicine Centre, Chinese PLA General Hospital, Beijing, China
| | - Hanlu Li
- Transformation Medicine Centre, Chinese PLA General Hospital, Beijing, China
| | - Jianxiu Hao
- Transformation Medicine Centre, Chinese PLA General Hospital, Beijing, China
| | - Ya Ping Tian
- Transformation Medicine Centre, Chinese PLA General Hospital, Beijing, China.,Beijing Key Laboratory of Chronic Heart Failure Precision Medicine, Chinese PLA General Hospital, Beijing, China
| | - Kunlun He
- Transformation Medicine Centre, Chinese PLA General Hospital, Beijing, China.,Beijing Key Laboratory of Chronic Heart Failure Precision Medicine, Chinese PLA General Hospital, Beijing, China
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7
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Diteepeng T, Del Monte F, Luciani M. The long and winding road to target protein misfolding in cardiovascular diseases. Eur J Clin Invest 2021; 51:e13504. [PMID: 33527342 DOI: 10.1111/eci.13504] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 01/18/2021] [Accepted: 01/26/2021] [Indexed: 12/11/2022]
Abstract
BACKGROUND In the last decades, cardiovascular diseases (CVD) have remained the first leading cause of mortality and morbidity in the world. Although several therapeutic approaches have been introduced in the past, the development of novel treatments remains an important research goal, which is hampered by the lack of understanding of key mechanisms and targets. Emerging evidences in recent years indicate the involvement of misfolded proteins aggregation and the derailment of protein quality control in the pathogenesis of cardiovascular diseases. Several potential interventions targeting protein quality control have been translated from the bench to the bedside to effectively employ the misfolded proteins as promising therapeutic targets for cardiac diseases, but with trivial results. DESIGN In this review, we describe the recent progresses in preclinical and clinical studies of protein misfolding and compromised protein quality control by selecting and reporting studies focusing on cardiovascular diseases including cardiomyopathies, cardiac amyloidosis, atherosclerosis, atrial fibrillation and thrombosis. RESULTS In preclinical models, modulators of several molecular targets (eg heat shock proteins, unfolded protein response, ubiquitin protein system, autophagy and histone deacetylases) have been tested in various conditions with promising results although lacking an adequate transition towards clinical setting. CONCLUSIONS At present, no therapeutic strategies have been reported to attenuate proteotoxicity in patients with CVD due to a lack of specific biomarkers for pinpointing upstream events in protein folding defects at a subclinical stage of the diseases requiring an intensive collaboration between basic scientists and clinicians.
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Affiliation(s)
- Thamonwan Diteepeng
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland
| | - Federica Del Monte
- Department of Medicine, Division of Cardiology, Medical University of South Carolina, Charleston, SC, USA.,Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna Alma Mater, Bologna, Italy
| | - Marco Luciani
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland.,Department of Internal Medicine, Cantonal Hospital of Baden, Baden, Switzerland
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8
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Agrawal A, Rathor R, Kumar R, Suryakumar G, Singh SN, Kumar B. Redox modification of ryanodine receptor contributes to impaired Ca 2+ homeostasis and exacerbates muscle atrophy under high altitude. Free Radic Biol Med 2020; 160:643-656. [PMID: 32916280 DOI: 10.1016/j.freeradbiomed.2020.09.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 08/17/2020] [Accepted: 09/01/2020] [Indexed: 12/18/2022]
Abstract
At extreme altitude, prolonged and severe hypoxia menaces human function and survival, and also associated with profound loss of muscle mass which results into a debilitating critical illness of skeletal muscle atrophy. Hypobaric hypoxia altered redox homeostasis and impaired calcium ion handling in skeletal muscles. Dysregulated Ca2+ homeostasis and activated calpain is the prime stressor in high altitude hypoxia while the reason for subsequent abnormal release of pathological Ca2+ into cytoplasm is largely unexplored. The present study identified the redox remodeling in the Ca2+ release channel, Ryanodine Receptor (RyR1) owing to its hypernitrosylation state in skeletal muscles in chronic hypobaric hypoxia exposed rats. RyR1-hypernitrosylation decreases the binding of FKBP12/calstabin-1 and other complexes from the channel, causing "leakiness" in RyR1 ion-channel. A strong RyR1 stabilizer, S107 enhanced binding affinity of FKBP12 with hypernitrosylated RyR1, reduced Sarco(endo)plasmic reticulum (SR) Ca2+ leak and improved muscle strength and function under chronic hypoxia. Administration of S107 inhibited the skeletal muscle damage, maintained ultrastructure of sarcomere and sarcolemmal integrity. Histological analysis proved the increase in cross-sectional area of myofibers. Further, the number of apoptotic cells was also reduced by S107 treatment. Conclusively, we proposed that the redox remodeling of RyR1 (hypernitrosylated-RyR1) might be responsible for dysregulated Ca2+ homeostasis which consequently impaired muscle strength and function in response to chronic hypoxic stress. Reduced SR Ca2+ leak and enhanced binding affinity of FKBP12 may provide a novel therapeutic avenue in ameliorating skeletal muscle atrophy at high altitude.
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Affiliation(s)
- Akanksha Agrawal
- Defence Institute of Physiology and Allied Sciences, Lucknow Road, Timarpur, New Delhi, 110054, India
| | - Richa Rathor
- Defence Institute of Physiology and Allied Sciences, Lucknow Road, Timarpur, New Delhi, 110054, India.
| | - Ravi Kumar
- Defence Institute of Physiology and Allied Sciences, Lucknow Road, Timarpur, New Delhi, 110054, India
| | - Geetha Suryakumar
- Defence Institute of Physiology and Allied Sciences, Lucknow Road, Timarpur, New Delhi, 110054, India
| | - Som Nath Singh
- Defence Institute of Physiology and Allied Sciences, Lucknow Road, Timarpur, New Delhi, 110054, India
| | - Bhuvnesh Kumar
- Defence Institute of Physiology and Allied Sciences, Lucknow Road, Timarpur, New Delhi, 110054, India
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9
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Adiponectin protects HL-1 cardiomyocytes against rotenone-induced cytotoxicity through AMPK activation. Toxicol Lett 2020; 335:82-90. [PMID: 33137417 DOI: 10.1016/j.toxlet.2020.10.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 10/03/2020] [Accepted: 10/20/2020] [Indexed: 12/11/2022]
Abstract
The relationship between mitochondrial dysfunction or ER stress with pathogenesis of cardiovascular disease is well documented, but the crosstalk between them in cardiovascular diseases is not clear. Adiponectin (APN) is reported to become a potential cardioprotective molecule, but whether and how APN regulates mitochondrial dysfunction and ER stress is not clear. In this study, we used rotenone-treated HL-1 atrial cardiomyocytes as an in vitro model of mitochondrial dysfunction to investigate the possible interactions between mitochondrial dysfunction and ER stress and explore the effects of APN on rotenone-induced cytotoxicity and the underlying mechanisms. It found that rotenone treatment significantly activated the ER stress PRK-like endoplasmic reticulum kinase (PERK)-dependent pathway, decreased autophagic flux and APN expression in a dose-dependent manner. Pretreatment of GSK2606414, an inhibitor of PERK kinase activity, attenuated the rotenone-induced decrease of APN expression. In return exogenous APN pretreatment inhibited rotenone-induced ER stress and activated autophagy via AMP-activated protein kinase (AMPK) activation and protected HL-1 cells against apoptosis and enhanced the viability after rotenone treatment. In conclusion, rotenone treatment induced significant cardiomyocyte cytotoxicity and ER stress, suppressed autophagy, and decreased APN expression in HL-1 cells. APN in return inhibited ER stress and activated autophagy through AMPK activation, thus alleviating rotenone induced HL-1 apoptosis.
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10
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Hu XQ, Song R, Romero M, Dasgupta C, Min J, Hatcher D, Xiao D, Blood A, Wilson SM, Zhang L. Gestational Hypoxia Inhibits Pregnancy-Induced Upregulation of Ca 2+ Sparks and Spontaneous Transient Outward Currents in Uterine Arteries Via Heightened Endoplasmic Reticulum/Oxidative Stress. Hypertension 2020; 76:930-942. [PMID: 32683903 PMCID: PMC7429261 DOI: 10.1161/hypertensionaha.120.15235] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Hypoxia during pregnancy profoundly affects uterine vascular adaptation and increases the risk of pregnancy complications, including preeclampsia and fetal intrauterine growth restriction. We recently demonstrated that increases in Ca2+ sparks and spontaneous transient outward currents (STOCs) played an essential role in pregnancy-induced uterine vascular adaptation. In the present study, we hypothesize that gestational hypoxia suppresses Ca2+ sparks/STOCs coupling leading to increased uterine vascular tone via enhanced endoplasmic reticulum (ER)/oxidative stress. Uterine arteries were obtained from nonpregnant and near-term pregnant sheep residing in low altitude or acclimatizing to high-altitude (3801 m) hypoxia for ≈110 days. High-altitude hypoxia suppressed pregnancy-induced upregulation of RyR1 and RyR2 (ryanodine receptor 1 and 2) protein abundance, Ca2+ sparks, and STOCs in uterine arteries. Inhibition of Ca2+ sparks/STOCs with the RyR inhibitor ryanodine significantly increased pressure-dependent myogenic tone in uterine arteries from low-altitude normoxic pregnant animals but not those from high-altitude hypoxic pregnant animals. Gestational hypoxia significantly increased ER/oxidative stress in uterine arteries. Of importance, the hypoxia-mediated suppression of Ca2+ sparks/STOCs and increase in myogenic tone in uterine arteries of pregnant animals were reversed by inhibiting ER/oxidative stress. Of great interest, the impaired sex hormonal regulation of STOCs in high-altitude animals was annulled by scavenging reactive oxygen species but not by inhibiting ER stress. Together, the findings reveal the differential mechanisms of ER and oxidative stresses in suppressing Ca2+ sparks/STOCs and increasing myogenic tone of uterine arteries in hypoxia during gestation, providing new insights into the understanding of pregnancy complications associated with hypoxia.
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Affiliation(s)
- Xiang-Qun Hu
- From the Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, CA
| | - Rui Song
- From the Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, CA
| | - Monica Romero
- From the Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, CA
| | - Chiranjib Dasgupta
- From the Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, CA
| | - Joseph Min
- From the Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, CA
| | - Daisy Hatcher
- From the Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, CA
| | - Daliao Xiao
- From the Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, CA
| | - Arlin Blood
- From the Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, CA
| | - Sean M Wilson
- From the Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, CA
| | - Lubo Zhang
- From the Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, CA
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11
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Wang J, Zhang W, Wu L, Mei Y, Cui S, Feng Z, Chen X. New insights into the pathophysiological mechanisms underlying cardiorenal syndrome. Aging (Albany NY) 2020; 12:12422-12431. [PMID: 32561688 PMCID: PMC7343447 DOI: 10.18632/aging.103354] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 05/20/2020] [Indexed: 12/17/2022]
Abstract
Communication between the heart and kidney occurs through various bidirectional pathways. The heart maintains continuous blood flow through the kidney while the kidney regulates blood volume thereby allowing the heart to pump effectively. Cardiorenal syndrome (CRS) is a pathologic condition in which acute or chronic dysfunction of the heart or kidney induces acute or chronic dysfunction of the other organ. CRS type 3 (CRS-3) is defined as acute kidney injury (AKI)-mediated cardiac dysfunction. AKI is common among critically ill patients and correlates with increased mortality and morbidity. Acute cardiac dysfunction has been observed in over 50% of patients with severe AKI and results in poorer clinical outcomes than heart or renal dysfunction alone. In this review, we describe the pathophysiological mechanisms responsible for AKI-induced cardiac dysfunction. Additionally, we discuss current approaches in the management of patients with CRS-3 and the development of targeted therapeutics. Finally, we summarize current challenges in diagnosing mild cardiac dysfunction following AKI and in understanding CRS-3 etiology.
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Affiliation(s)
- Jin Wang
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Diseases, Beijing 100853, China
| | - Weiguang Zhang
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Diseases, Beijing 100853, China
| | - Lingling Wu
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Diseases, Beijing 100853, China
| | - Yan Mei
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Diseases, Beijing 100853, China
| | - Shaoyuan Cui
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Diseases, Beijing 100853, China
| | - Zhe Feng
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Diseases, Beijing 100853, China
| | - Xiangmei Chen
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Diseases, Beijing 100853, China
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12
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Reddy SS, Shruthi K, Joy D, Reddy GB. 4-PBA prevents diabetic muscle atrophy in rats by modulating ER stress response and ubiquitin-proteasome system. Chem Biol Interact 2019; 306:70-77. [DOI: 10.1016/j.cbi.2019.04.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 03/29/2019] [Accepted: 04/08/2019] [Indexed: 02/08/2023]
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13
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Luo G, Jian Z, Zhu Y, Zhu Y, Chen B, Ma R, Tang F, Xiao Y. Sirt1 promotes autophagy and inhibits apoptosis to protect cardiomyocytes from hypoxic stress. Int J Mol Med 2019; 43:2033-2043. [PMID: 30864731 PMCID: PMC6443335 DOI: 10.3892/ijmm.2019.4125] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 02/13/2019] [Indexed: 01/11/2023] Open
Abstract
Sirtuin 1 (Sirt1) exerts its cardioprotective effects in various cardiovascular diseases via multiple cellular activities. However, the therapeutic implications of Sirt1 in hypoxic cardiomyocytes and the underlying mechanisms remain elusive. The present study investigated whether Sirt1 regulates autophagy and apoptosis in hypoxic H9C2 cardiomyocytes and in an experimental hypoxic mouse model. Right ventricular outflow tract biopsies were obtained from patients with cyanotic or acyanotic congenital heart diseases. Adenovirus Ad‑Sirt1 was used to activate Sirt1 and Ad‑Sh‑Sirt1 was used to inhibit Sirt1 expression in H9C2 cells, in order to investigate the effect of Sirt1 on cellular autophagy and apoptosis. SRT1720, a pharmacological activator of Sirt1 and EX‑527, a Sirt1 antagonist, were administered to mice to explore the role of Sirt1 in hypoxic cardiomyocytes in vivo. The levels of autophagy and apoptosis‑related proteins were evaluated using western blotting. Apoptosis was investigated by TUNEL staining and Annexin V/7‑aminoactinomycin D flow cytometry analysis. Heart tissue samples from cyanotic patients exhibited increased autophagy and apoptosis, as well as elevated Sirt1 levels, compared with the noncyanotic control samples. The data from the western blot analysis revealed that Sirt1 promoted autophagic flux and reduced apoptosis in hypoxic H9C2 cells. In addition, Sirt1 activated AMP‑activated protein kinase (AMPK), and the AMPK inhibitor Compound C abolished the effect of Sirt1 on autophagy activation. Further exploration of the mechanism revealed that Sirt1 protects hypoxic cardiomyocytes from apoptosis, at least in part, through inositol requiring kinase enzyme 1α (IRE1α). Consistent with the in vitro results, treatment with the Sirt1 activator SRT1720 activated AMPK, inhibited IRE1α, enhanced autophagy, and decreased apoptosis in the heart tissues of normoxic mice compared with the hypoxia control group. Opposite changes were observed in hypoxic mice treated with the Sirt1 inhibitor EX‑527. These results suggested that Sirt1 promoted autophagy via AMPK activation and reduced hypoxia‑induced apoptosis via the IRE1α pathway, to protect cardiomyocytes from hypoxic stress.
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Affiliation(s)
- Guiping Luo
- Department of Cardiovascular Surgery, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Zhao Jian
- Department of Cardiovascular Surgery, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Yun Zhu
- Department of Cardiovascular Surgery, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Yu Zhu
- Department of Cardiovascular Surgery, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Baicheng Chen
- Department of Cardiovascular Surgery, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Ruiyan Ma
- Department of Cardiovascular Surgery, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Fuqin Tang
- Department of Cardiovascular Surgery, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Yingbin Xiao
- Department of Cardiovascular Surgery, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
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14
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Delbrel E, Soumare A, Naguez A, Label R, Bernard O, Bruhat A, Fafournoux P, Tremblais G, Marchant D, Gille T, Bernaudin JF, Callard P, Kambouchner M, Martinod E, Valeyre D, Uzunhan Y, Planès C, Boncoeur E. HIF-1α triggers ER stress and CHOP-mediated apoptosis in alveolar epithelial cells, a key event in pulmonary fibrosis. Sci Rep 2018; 8:17939. [PMID: 30560874 PMCID: PMC6299072 DOI: 10.1038/s41598-018-36063-2] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 11/09/2018] [Indexed: 12/28/2022] Open
Abstract
Endoplasmic Reticulum (ER) stress of alveolar epithelial cells (AECs) is recognized as a key event of cell dysfunction in pulmonary fibrosis (PF). However, the mechanisms leading to AECs ER stress and ensuing unfolded protein response (UPR) pathways in idiopathic PF (IPF) remain unclear. We hypothesized that alveolar hypoxic microenvironment would generate ER stress and AECs apoptosis through the hypoxia-inducible factor-1α (HIF-1α). Combining ex vivo, in vivo and in vitro experiments, we investigated the effects of hypoxia on the UPR pathways and ER stress-mediated apoptosis, and consecutively the mechanisms linking hypoxia, HIF-1α, UPR and apoptosis. HIF-1α and the pro-apoptotic ER stress marker C/EBP homologous protein (CHOP) were co-expressed in hyperplastic AECs from bleomycin-treated mice and IPF lungs, not in controls. Hypoxic exposure of rat lungs or primary rat AECs induced HIF-1α, CHOP and apoptosis markers expression. In primary AECs, hypoxia activated UPR pathways. Pharmacological ER stress inhibitors and pharmacological inhibition or silencing of HIF-1α both prevented hypoxia-induced upregulation of CHOP and apoptosis. Interestingly, overexpression of HIF-1α in normoxic AECs increased UPR pathways transcription factors activities, and CHOP expression. These results indicate that hypoxia and HIF-1α can trigger ER stress and CHOP-mediated apoptosis in AECs, suggesting their potential contribution to the development of IPF.
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Affiliation(s)
- Eva Delbrel
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France
| | - Abdoulaye Soumare
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France
| | - Adnan Naguez
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France
| | - Rabab Label
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France
| | - Olivier Bernard
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France
| | - Alain Bruhat
- Institut National de la Recherche Agronomique (INRA), UMR-1019 Nutrition Humaine, Centre INRA Auvergne Rhône-Alpes, Clermont Auvergne Université, 63122, Saint Genès Champanelle, France
| | - Pierre Fafournoux
- Institut National de la Recherche Agronomique (INRA), UMR-1019 Nutrition Humaine, Centre INRA Auvergne Rhône-Alpes, Clermont Auvergne Université, 63122, Saint Genès Champanelle, France
| | - Geoffrey Tremblais
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France
| | - Dominique Marchant
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France
| | - Thomas Gille
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France.,APHP, Hôpital Avicenne, F-93017, Bobigny, France
| | - Jean-François Bernaudin
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France.,APHP, Hôpital Avicenne, F-93017, Bobigny, France.,Sorbonne Université, Faculté de Médecine, 75013, Paris, France
| | - Patrice Callard
- Sorbonne Université, Faculté de Médecine, 75013, Paris, France
| | | | - Emmanuel Martinod
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France.,APHP, Hôpital Avicenne, F-93017, Bobigny, France
| | - Dominique Valeyre
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France.,APHP, Hôpital Avicenne, F-93017, Bobigny, France
| | - Yurdagül Uzunhan
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France.,APHP, Hôpital Avicenne, F-93017, Bobigny, France
| | - Carole Planès
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France.,APHP, Hôpital Avicenne, F-93017, Bobigny, France
| | - Emilie Boncoeur
- Université Paris 13, Sorbonne Paris Cité, Laboratoire 'Hypoxie & Poumon' (EA 2363), F-93017, Bobigny, France.
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15
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Targeting endoplasmic reticulum stress in hypoxia-induced cardiac injury. Vascul Pharmacol 2016; 83:1-3. [PMID: 27234171 PMCID: PMC6605064 DOI: 10.1016/j.vph.2016.05.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 04/28/2016] [Accepted: 05/17/2016] [Indexed: 01/01/2023]
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