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Cheng R, Jiang Y, Zhang Y, Ismail M, Zhang L, Jiang Z, Yu Q. Proteasome activity inhibition mediates endoplasmic reticulum stress-apoptosis in triptolide/lipopolysaccharide-induced hepatotoxicity. Cell Biol Toxicol 2024; 40:60. [PMID: 39073694 PMCID: PMC11286718 DOI: 10.1007/s10565-024-09903-3] [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] [Received: 03/22/2024] [Accepted: 07/18/2024] [Indexed: 07/30/2024]
Abstract
Triptolide (TP) is a major active and toxic composition of the Chinese medicine Tripterygium wilfordii Hook. F. (TWHF), exhibiting various therapeutic bioactivities. Among the toxic effects, the hepatotoxicity of TP deserves serious attention. Previously, our research group proposed a new view of TP-related hepatotoxicity: hepatic hypersensitivity under lipopolysaccharide (LPS) stimulation. However, the mechanism of TP/LPS-induced hepatic hypersensitivity remains unclear. In this study, we investigated the mechanism underlying TP/LPS-induced hypersensitivity from the perspective of the inhibition of proteasome activity, activated endoplasmic reticulum stress (ERS)-related apoptosis, and the accumulation of reactive oxygen species (ROS). Our results showed that N-acetylcysteine (NAC), a common ROS inhibitor, decreased the expression of cleaved caspase-3 and cleaved PARP, which are associated with FLIP enhancement. Moreover, 4-phenylbutyric acid (4-PBA), an ERS inhibitor, was able to alleviate TP/LPS-induced hepatotoxicity by reducing ERS-related apoptosis protein expression (GRP78, p-eIF2α/eIF2α, ATF4, CHOP, cleaved caspase-3 and cleaved PARP) and ROS levels, with ATF4 being an indispensable mediator. In addition, the proteasome activity inhibitor MG-132 further aggravated ERS-related apoptosis, which indicated that the inhibition of proteasome activity also plays an important role in TP/LPS-related liver injuries. In summary, we propose that TP/LPS may upregulate the activation of ERS-associated apoptosis by inhibiting proteasome activity and enhancing ROS production through ATF4.
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Affiliation(s)
- Ruohan Cheng
- Jiangsu Center for Pharmacodynamics Research and Evaluation, State Key Laboratory of Natural Medicines, New Drug Screening Center, China Pharmaceutical University, Nanjing, 210009, China
| | - Yihan Jiang
- Jiangsu Center for Pharmacodynamics Research and Evaluation, State Key Laboratory of Natural Medicines, New Drug Screening Center, China Pharmaceutical University, Nanjing, 210009, China
| | - Yue Zhang
- Jiangsu Center for Pharmacodynamics Research and Evaluation, State Key Laboratory of Natural Medicines, New Drug Screening Center, China Pharmaceutical University, Nanjing, 210009, China
| | - Mohammed Ismail
- Jiangsu Center for Pharmacodynamics Research and Evaluation, State Key Laboratory of Natural Medicines, New Drug Screening Center, China Pharmaceutical University, Nanjing, 210009, China
| | - Luyong Zhang
- Jiangsu Center for Pharmacodynamics Research and Evaluation, State Key Laboratory of Natural Medicines, New Drug Screening Center, China Pharmaceutical University, Nanjing, 210009, China.
- Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, 510006, China.
| | - Zhenzhou Jiang
- Jiangsu Center for Pharmacodynamics Research and Evaluation, State Key Laboratory of Natural Medicines, New Drug Screening Center, China Pharmaceutical University, Nanjing, 210009, China.
- Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, China Pharmaceutical University, Nanjing, 210009, China.
| | - Qinwei Yu
- Jiangsu Center for Pharmacodynamics Research and Evaluation, State Key Laboratory of Natural Medicines, New Drug Screening Center, China Pharmaceutical University, Nanjing, 210009, China.
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Mansouri E, Shafiei Seifabadi Z, Azarbarz N, Zare Moaiedi M. Effects of sodium hydrosulfide (NaHS) on cisplatin-induced hepatic and cardiac toxicity. Drug Chem Toxicol 2024; 47:227-234. [PMID: 37553904 DOI: 10.1080/01480545.2023.2242008] [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: 05/10/2023] [Revised: 07/11/2023] [Accepted: 07/21/2023] [Indexed: 08/10/2023]
Abstract
In recent years, the cardiotoxicity and hepatotoxicity induced by chemotherapeutic drugs such as cisplatin (CP) have become significant issues. The current research looks into the effects of sodium hydrosulfide (NaHS) on CP-induced hepatotoxicity and cardiotoxicity in rats. A total of 32 male Sprague Dawley rats were separated into four different groups: (1) control group, received only normal saline; (2) NaHS group, was intraperitoneally injected with NaHS (200 µg/kg/d, dissolved in saline) for 15 days; (3) CP group, was intraperitoneally injected only one dose of CP (5 mg/kg) and (4) CP plus NaHS group, received CP along with NaHS. Blood and tissues samples were harvested for biochemical, histopathological, and immunohistochemical investigations. To determine the data's statistical significance, a one-way analysis of variance was used. CP injection significantly increased alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), lactate dehydrogenase (LDH), Creatine phospho kinase (CK-MB), cholesterol, low-density lipoprotein (LDL), triglyceride (TG), and lipid peroxidation levels, while high-density lipoprotein (HDL), albumin, glutathione peroxidase, superoxide dismutase, and catalase (CAT) levels were significantly reduced with pathological alterations in liver and heart tissues. Co-treatment NaHS with CP ameliorates the biochemical and histological parameters. Also, Treatment solely with CP resulted in increased tissue expression of interleukin-1β (IL-1β) in liver and heart but co-treatment NaHS with CP reduced the expression of this inflammatory factor. We conclude that NaHS operates in the liver and heart as an anti-inflammatory and powerful free radicals' scavenger to inhibit the toxic effects of CP, both at the biochemical and histopathological levels.
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Affiliation(s)
- Esrafil Mansouri
- Department of Anatomical Sciences, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
- Cellular and Molecular Research Center, Medical Basic Sciences Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Zeinab Shafiei Seifabadi
- Department of Anatomical Sciences, Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Nastaran Azarbarz
- Department of Anatomical Sciences, Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Maasoumeh Zare Moaiedi
- Department of Clinical Biochemistry, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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Pan W, Zhang J, Zhang L, Zhang Y, Song Y, Han L, Tan M, Yin Y, Yang T, Jiang T, Li H. Comprehensive view of macrophage autophagy and its application in cardiovascular diseases. Cell Prolif 2024; 57:e13525. [PMID: 37434325 PMCID: PMC10771119 DOI: 10.1111/cpr.13525] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 06/17/2023] [Accepted: 06/22/2023] [Indexed: 07/13/2023] Open
Abstract
Cardiovascular diseases (CVDs) are the primary drivers of the growing public health epidemic and the leading cause of premature mortality and economic burden worldwide. With decades of research, CVDs have been proven to be associated with the dysregulation of the inflammatory response, with macrophages playing imperative roles in influencing the prognosis of CVDs. Autophagy is a conserved pathway that maintains cellular functions. Emerging evidence has revealed an intrinsic connection between autophagy and macrophage functions. This review focuses on the role and underlying mechanisms of autophagy-mediated regulation of macrophage plasticity in polarization, inflammasome activation, cytokine secretion, metabolism, phagocytosis, and the number of macrophages. In addition, autophagy has been shown to connect macrophages and heart cells. It is attributed to specific substrate degradation or signalling pathway activation by autophagy-related proteins. Referring to the latest reports, applications targeting macrophage autophagy have been discussed in CVDs, such as atherosclerosis, myocardial infarction, heart failure, and myocarditis. This review describes a novel approach for future CVD therapies.
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Affiliation(s)
- Wanqian Pan
- Department of CardiologyThe First Affiliated Hospital of Soochow UniversitySuzhouChina
| | - Jun Zhang
- Department of CardiologyThe First Affiliated Hospital of Soochow UniversitySuzhouChina
| | - Lei Zhang
- Department of CardiologyThe First Affiliated Hospital of Soochow UniversitySuzhouChina
| | - Yue Zhang
- Department of CardiologyThe First Affiliated Hospital of Soochow UniversitySuzhouChina
| | - Yiyi Song
- Suzhou Medical College of Soochow UniversitySuzhouChina
| | - Lianhua Han
- Department of CardiologyThe First Affiliated Hospital of Soochow UniversitySuzhouChina
| | - Mingyue Tan
- Department of CardiologyThe First Affiliated Hospital of Soochow UniversitySuzhouChina
| | - Yunfei Yin
- Department of CardiologyThe First Affiliated Hospital of Soochow UniversitySuzhouChina
| | - Tianke Yang
- Department of Ophthalmology, Eye Institute, Eye & ENT HospitalFudan UniversityShanghaiChina
- Department of OphthalmologyThe First Affiliated Hospital of USTC, University of Science and Technology of ChinaHefeiChina
| | - Tingbo Jiang
- Department of CardiologyThe First Affiliated Hospital of Soochow UniversitySuzhouChina
| | - Hongxia Li
- Department of CardiologyThe First Affiliated Hospital of Soochow UniversitySuzhouChina
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Nguyen TTP, Nguyen PL, Park SH, Jung CH, Jeon TI. Hydrogen Sulfide and Liver Health: Insights into Liver Diseases. Antioxid Redox Signal 2024; 40:122-144. [PMID: 37917113 DOI: 10.1089/ars.2023.0404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2023]
Abstract
Significance: Hydrogen sulfide (H2S) is a recently recognized gasotransmitter involved in physiological and pathological conditions in mammals. It protects organs from oxidative stress, inflammation, hypertension, and cell death. With abundant expression of H2S-production enzymes, the liver is closely linked to H2S signaling. Recent Advances: Hepatic H2S comes from various sources, including gut microbiota, exogenous sulfur salts, and endogenous production. Recent studies highlight the importance of hepatic H2S in liver diseases such as nonalcoholic fatty liver disease (NAFLD), liver injury, and cancer, particularly at advanced stages. Endogenous H2S production deficiency is associated with severe liver disease, while exogenous H2S donors protect against liver dysfunction. Critical Issues: However, the roles of H2S in NAFLD, liver injury, and liver cancer are still debated, and its effects depend on donor type, dosage, treatment duration, and cell type, suggesting a multifaceted role. This review aimed to critically evaluate H2S production, metabolism, mode of action, and roles in liver function and disease. Future Direction: Understanding H2S's precise roles and mechanisms in liver health will advance potential therapeutic applications in preclinical and clinical research. Targeting H2S-producing enzymes and exogenous H2S sources, alone or in combination with other drugs, could be explored. Quantifying endogenous H2S levels may aid in diagnosing and managing liver diseases. Antioxid. Redox Signal. 40, 122-144.
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Affiliation(s)
- Thuy T P Nguyen
- Department of Animal Science, College of Agriculture and Life Science, Chonnam National University, Gwangju, Republic of Korea
- Division of Radiation and Genome Stability, Department of Radiation Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts, USA
| | - Phuc L Nguyen
- Department of Animal Science, College of Agriculture and Life Science, Chonnam National University, Gwangju, Republic of Korea
| | - So-Hyun Park
- Aging and Metabolism Research Group, Korea Food Research Institute, Wanju-gun, Republic of Korea
| | - Chang Hwa Jung
- Aging and Metabolism Research Group, Korea Food Research Institute, Wanju-gun, Republic of Korea
| | - Tae-Il Jeon
- Department of Animal Science, College of Agriculture and Life Science, Chonnam National University, Gwangju, Republic of Korea
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Wen X, Bi S, Wang C, Zeng S. An Activated Structure Transformable Ratiometric Photoacoustic Nanoprobe for Real-Time Dynamic Monitoring of H 2S In Vivo. NANO LETTERS 2023; 23:10642-10650. [PMID: 37955992 DOI: 10.1021/acs.nanolett.3c03980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
H2S has emerged as a promising biomarker for many diseases such as colon cancer and metformin-induced hepatotoxicity. Real-time monitoring of H2S levels in vivo is significant for early accurate diagnosis of these diseases. Herein, a new accurate and reliable nanoprobe (Au NRs@Ag) was designed for real-time dynamic ratiometric photoacoustic (PA) imaging of H2S in vivo based on the endogenous H2S-triggered local surface plasmon resonance (LSPR) red-shift. The Au NRs@Ag nanoprobe can be readily converted into Au NRs@Ag2S via the endogenous H2S-activated in situ sulfurative reaction, subsequently leading to a significant red-shift of the LSPR wavelength from 808 to 980 nm and enabling accurate ratiometric PA (PA980/PA808) imaging of H2S. Moreover, dynamic ratiometric PA imaging of metformin-induced hepatotoxicity was also successfully achieved by the designed PA imaging strategy. These findings provide the possibility of designing a new ratiometric PA imaging strategy for dynamic in situ monitoring of H2S-related diseases.
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Affiliation(s)
- Xingwang Wen
- School of Physics and Electronics, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of the Ministry of Education, Synergetic Innovation Center for Quantum Effects and Applications, Key Laboratory for Matter Microstructure and Function of Hunan Province, Institute of Interdisciplinary Studies, Hunan Normal University, Changsha, Hunan 410081, China
| | - Shenghui Bi
- School of Physics and Electronics, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of the Ministry of Education, Synergetic Innovation Center for Quantum Effects and Applications, Key Laboratory for Matter Microstructure and Function of Hunan Province, Institute of Interdisciplinary Studies, Hunan Normal University, Changsha, Hunan 410081, China
| | - Chunxia Wang
- School of Physics and Electronics, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of the Ministry of Education, Synergetic Innovation Center for Quantum Effects and Applications, Key Laboratory for Matter Microstructure and Function of Hunan Province, Institute of Interdisciplinary Studies, Hunan Normal University, Changsha, Hunan 410081, China
| | - Songjun Zeng
- School of Physics and Electronics, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of the Ministry of Education, Synergetic Innovation Center for Quantum Effects and Applications, Key Laboratory for Matter Microstructure and Function of Hunan Province, Institute of Interdisciplinary Studies, Hunan Normal University, Changsha, Hunan 410081, China
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Jafar Sameri M, Belali R, Neisi N, Noei Razliqi R, Mard SA, Savari F, Azandeh SS. Sodium Hydrosulfide Modification of Mesenchymal Stem Cell-Exosomes Improves Liver Function in CCL4-Induced Hepatic Injury in Mice. Rep Biochem Mol Biol 2023; 11:644-655. [PMID: 37131889 PMCID: PMC10149127 DOI: 10.52547/rbmb.11.4.644] [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: 10/19/2022] [Accepted: 10/22/2022] [Indexed: 05/04/2023]
Abstract
Background Liver diseases and injuries are important medical problems worldwide. Acute liver failure (ALF) is a clinical syndrome characterized by severe functional impairment and widespread death of hepatocytes. Liver transplantation is the only treatment available so far. Exosomes are nanovesicles originating from intracellular organelles. They regulate the cellular and molecular mechanisms of their recipient cells and have promising potential for clinical application in acute and chronic liver injuries. This study compares the effect of Sodium hydrosulfide (NaHS) modified exosomes with non-modified exosomes in CCL4-induced acute liver injury to ascertain their role in ameliorating hepatic injury. Methods Human Mesenchymal stem cells (MSCs) were treated with or without NaHS (1 μmol) and exosomes were isolated using an exosome isolation kit. Male mice (8-12 weeks old) were randomly divided into four groups (n=6): 1-control, 2-PBS, 3- MSC-Exo, and 4- H2S-Exo. Animals received 2.8 ml/kg body weight of CCL4 solution intraperitoneally, and 24 h later MSC-Exo (non-modified), H2S-Exo (NaHS-modified), or PBS, was injected in the tail vein. Moreover, 24 h after Exo administration, mice were sacrificed for tissue and blood collection. Results Administration of both MSC-Exo and H2S-Exo reduced inflammatory cytokines (IL-6, TNF-α), total oxidant levels, liver aminotransferases, and cellular apoptosis. Conclusion MSC-Exo and H2S-Exo had hepato-protective effects against CCL4-induced liver injury in mice. Modification of cell culture medium with NaHS as an H2S donor enhances the therapeutic effects of MSC exosomes.
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Affiliation(s)
- Maryam Jafar Sameri
- Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
- Physiology department, Abadan University of Medical Sciences, Abadan, Iran.
- Corresponding author: Maryam Jafar Sameri; Tel: +98 9381267697; E-mail: & Reza Noei Razliqi; Tel: +98 9381267697; E-mail:
| | - Rafeie Belali
- Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Niloofar Neisi
- Infectious and Tropical Diseases Research Center, Health Research Institute, Department of Medical virology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Reza Noei Razliqi
- Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
- Corresponding author: Maryam Jafar Sameri; Tel: +98 9381267697; E-mail: & Reza Noei Razliqi; Tel: +98 9381267697; E-mail:
| | - Seyed Ali Mard
- Persian Gulf Physiology Research Center, Medical Basic Sciences Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Feryal Savari
- Department of basic sciences, Shoushtar Faculty of Medical Sciences, Shoushtar, Iran.
| | - Seyyed Saeed Azandeh
- Department of Anatomical Sciences, School of Medicine, Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
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Sameri MJ, Savari F, Hoseinynejad K, Danyaei A, Mard SA. The hepato-protective effect of H2S-modified and non-modified mesenchymal stem cell exosomes on liver ischemia-reperfusion injury in mice: The role of MALAT1. Biochem Biophys Res Commun 2022; 635:194-202. [PMID: 36279681 DOI: 10.1016/j.bbrc.2022.09.111] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 09/21/2022] [Accepted: 09/28/2022] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Ischemia-reperfusion injury (IRI) by causing histopathological changes is considered one of the most important causes of liver failure and dysfunction after surgery which affect graft outcomes. Stem cells are new promising approaches to treating different diseases. One of the critical strategies to improve their function is the preconditioning of their culture medium. This study compared the effect of NaHS-modified and non-modified mesenchymal stem cell exosomes on liver ischemia-reperfusion injury in mice. METHODS Human umbilical cord-derived MSC (MSC) cultured in a 75 cm3 flask and when confluency reached about 80%, the culture medium replaced with a serum-free medium, and 48 h later supernatants collected, concentrated, and then MSC-Exo extracted. To obtain H2S-Exo, MSC was treated with NaHS (1 μmol),the supernatant collected after 48 h, concentrated and exosomes extracted. Twenty-four male mice were randomly divided into four groups (n = 6) including: 1-ischemia, 2-sham-operated, 3- MSC-Exo, and 4- H2S-Exo. To induce ischemia, the hepatic artery and portal vein clamped using an atraumatic clip for 60 min followed by 3 h of reperfusion. Just upon ending the time of ischemia (removal of clamp artery), animals in MSC-Exo, and H2S-Exo groups received 100 μg exosomes in 100 μl PBS via tail vein. At the end of reperfusion, blood, and liver samples were collected for further serological, molecular, and histological analyses. RESULTS Administration of both MSC-Exo and H2S-Exo improved liver function by reducing inflammatory cytokines, cellular apoptosis, liver levels of total oxidant status, and liver aminotransferases. The results showed that protecting effect of MSC exosomes enhanced following NaHS preconditioning of cell culture medium. CONCLUSION MSC-Exo and H2S-Exo had hepato-protective effects against injuries induced by ischemia-reperfusion in mice. NaHS preconditioning of mesenchymal stem cells could enhance the therapeutic effects of MSC-derived exosomes.
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Affiliation(s)
- Maryam J Sameri
- Persian Gulf Physiology Research Center, Medical Basic Sciences Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Feryal Savari
- Department of Basic Sciences, Shoushtar Faculty of Medical Sciences, Shoushtar, Iran
| | - Khojasteh Hoseinynejad
- Persian Gulf Physiology Research Center, Medical Basic Sciences Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Amir Danyaei
- Department of Medical Physics, The School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Seyed Ali Mard
- Persian Gulf Physiology Research Center, Medical Basic Sciences Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
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Liu B, Wang S, Xu M, Ma Y, Sun R, Ding H, Li L. The double-edged role of hydrogen sulfide in the pathomechanism of multiple liver diseases. Front Pharmacol 2022; 13:899859. [PMID: 36588686 PMCID: PMC9800830 DOI: 10.3389/fphar.2022.899859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 11/25/2022] [Indexed: 12/23/2022] Open
Abstract
In mammalian systems, hydrogen sulfide (H2S)-one of the three known gaseous signaling molecules in mammals-has been found to have a variety of physiological functions. Existing studies have demonstrated that endogenous H2S is produced through enzymatic and non-enzymatic pathways. The liver is the body's largest solid organ and is essential for H2S synthesis and elimination. Mounting evidence suggests H2S has essential roles in various aspects of liver physiological processes and pathological conditions, such as hepatic lipid metabolism, liver fibrosis, liver ischemia‒reperfusion injury, hepatocellular carcinoma, hepatotoxicity, and acute liver failure. In this review, we discuss the functions and underlying molecular mechanisms of H2S in multiple liver pathophysiological conditions.
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Affiliation(s)
- Bihan Liu
- Department of Hepatology and Gastroenterology, Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Shanshan Wang
- Department of Hepatology and Gastroenterology, Beijing Youan Hospital, Capital Medical University, Beijing, China,Beijing Institute of Hepatology, Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Ming Xu
- Brainnetome Center and National Laboratory of Pattern Recognition, Institute of Automation, Chinese Academy of Sciences, Beijing, China,School of Artificial Intelligence, University of Chinese Academy of Sciences, Beijing, China
| | - Yanan Ma
- Department of Hepatology and Gastroenterology, Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Rui Sun
- Department of Hepatology and Gastroenterology, Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Huiguo Ding
- Department of Hepatology and Gastroenterology, Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Lei Li
- Department of Hepatology and Gastroenterology, Beijing Youan Hospital, Capital Medical University, Beijing, China,*Correspondence: Lei Li,
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Hydrogen Sulfide and Its Donors: Keys to Unlock the Chains of Nonalcoholic Fatty Liver Disease. Int J Mol Sci 2022; 23:ijms232012202. [PMID: 36293058 PMCID: PMC9603526 DOI: 10.3390/ijms232012202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 09/30/2022] [Accepted: 10/09/2022] [Indexed: 11/17/2022] Open
Abstract
Hydrogen sulfide (H2S) has emerged as the third “gasotransmitters” and has a crucial function in the diversity of physiological functions in mammals. In particular, H2S is considered indispensable in preventing the development of liver inflammation in the case of excessive caloric ingestion. Note that the concentration of endogenous H2S was usually low, making it difficult to discern the precise biological functions. Therefore, exogenous delivery of H2S is conducive to probe the physiological and pathological roles of this gas in cellular and animal studies. In this review, the production and metabolic pathways of H2S in vivo, the types of donors currently used for H2S release, and study evidence of H2S improvement effects on nonalcoholic fatty liver disease are systematically introduced.
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Lu X, Ding Y, Liu H, Sun M, Chen C, Yang Y, Wang H. The Role of Hydrogen Sulfide Regulation of Autophagy in Liver Disorders. Int J Mol Sci 2022; 23:ijms23074035. [PMID: 35409395 PMCID: PMC8999478 DOI: 10.3390/ijms23074035] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 03/31/2022] [Accepted: 04/01/2022] [Indexed: 02/01/2023] Open
Abstract
Autophagy is a complex process of degradation of senescent or dysfunctional organelles in cells. Dysfunctional autophagy is associated with many diseases such as cancers, immune dysfunction, and aging. Hydrogen sulfide (H2S) is considered to be the third gas signal molecule after nitrous oxide and carbon monoxide. In recent years, H2S has been found to have a variety of important biological functions, and plays an important role in a variety of physiological and pathological processes. In this review, we review the recent role and mechanism of H2S in regulating autophagy in liver disorders, in order to provide a basis for further research in the future.
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Affiliation(s)
- Xueqin Lu
- Institute of Nursing and Health, School of Nursing and Health, Henan University, Jinming Avenue, Kaifeng 475004, China; (X.L.); (Y.D.); (C.C.)
| | - Yueming Ding
- Institute of Nursing and Health, School of Nursing and Health, Henan University, Jinming Avenue, Kaifeng 475004, China; (X.L.); (Y.D.); (C.C.)
| | - Huiyang Liu
- School of Basic Medical Sciences, Henan University, Kaifeng 475004, China; (H.L.); (M.S.); (Y.Y.)
| | - Mengyao Sun
- School of Basic Medical Sciences, Henan University, Kaifeng 475004, China; (H.L.); (M.S.); (Y.Y.)
| | - Chaoran Chen
- Institute of Nursing and Health, School of Nursing and Health, Henan University, Jinming Avenue, Kaifeng 475004, China; (X.L.); (Y.D.); (C.C.)
| | - Yihan Yang
- School of Basic Medical Sciences, Henan University, Kaifeng 475004, China; (H.L.); (M.S.); (Y.Y.)
| | - Honggang Wang
- School of Basic Medical Sciences, Henan University, Kaifeng 475004, China; (H.L.); (M.S.); (Y.Y.)
- Correspondence:
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Aroca A, Gotor C. Hydrogen Sulfide: A Key Role in Autophagy Regulation from Plants to Mammalians. Antioxidants (Basel) 2022; 11:327. [PMID: 35204209 PMCID: PMC8868472 DOI: 10.3390/antiox11020327] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 01/27/2022] [Accepted: 02/06/2022] [Indexed: 02/01/2023] Open
Abstract
Autophagy is a degradative conserved process in eukaryotes to recycle unwanted cellular protein aggregates and damaged organelles. Autophagy plays an important role under normal physiological conditions in multiple biological processes, but it is induced under cellular stress. Therefore, it needs to be tightly regulated to respond to different cellular stimuli. In this review, the regulation of autophagy by hydrogen sulfide is described in both animal and plant systems. The underlying mechanism of action of sulfide is deciphered as the persulfidation of specific targets, regulating the pro- or anti-autophagic role of sulfide with a cell survival outcome. This review aims to highlight the importance of sulfide and persulfidation in autophagy regulation comparing the knowledge available in mammals and plants.
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Affiliation(s)
- Angeles Aroca
- Institute of Plant Biochemistry and Photosynthesis, University of Seville and CSIC, 41092 Seville, Spain;
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Álvarez-Mercado AI, Rojano-Alfonso C, Micó-Carnero M, Caballeria-Casals A, Peralta C, Casillas-Ramírez A. New Insights Into the Role of Autophagy in Liver Surgery in the Setting of Metabolic Syndrome and Related Diseases. Front Cell Dev Biol 2021; 9:670273. [PMID: 34141709 PMCID: PMC8204012 DOI: 10.3389/fcell.2021.670273] [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: 02/20/2021] [Accepted: 04/23/2021] [Indexed: 01/18/2023] Open
Abstract
Visceral obesity is an important component of metabolic syndrome, a cluster of diseases that also includes diabetes and insulin resistance. A combination of these metabolic disorders damages liver function, which manifests as non-alcoholic fatty liver disease (NAFLD). NAFLD is a common cause of abnormal liver function, and numerous studies have established the enormously deleterious role of hepatic steatosis in ischemia-reperfusion (I/R) injury that inevitably occurs in both liver resection and transplantation. Thus, steatotic livers exhibit a higher frequency of post-surgical complications after hepatectomy, and using liver grafts from donors with NAFLD is associated with an increased risk of post-surgical morbidity and mortality in the recipient. Diabetes, another MetS-related metabolic disorder, also worsens hepatic I/R injury, and similar to NAFLD, diabetes is associated with a poor prognosis after liver surgery. Due to the large increase in the prevalence of MetS, NAFLD, and diabetes, their association is frequent in the population and therefore, in patients requiring liver resection and in potential liver graft donors. This scenario requires advancement in therapies to improve postoperative results in patients suffering from metabolic diseases and undergoing liver surgery; and in this sense, the bases for designing therapeutic strategies are in-depth knowledge about the molecular signaling pathways underlying the effects of MetS-related diseases and I/R injury on liver tissue. A common denominator in all these diseases is autophagy. In fact, in the context of obesity, autophagy is profoundly diminished in hepatocytes and alters mitochondrial functions in the liver. In insulin resistance conditions, there is a suppression of autophagy in the liver, which is associated with the accumulation of lipids, being this is a risk factor for NAFLD. Also, oxidative stress occurring in hepatic I/R injury promotes autophagy. The present review aims to shed some light on the role of autophagy in livers undergoing surgery and also suffering from metabolic diseases, which may lead to the discovery of effective therapeutic targets that could be translated from laboratory to clinical practice, to improve postoperative results of liver surgeries when performed in the presence of one or more metabolic diseases.
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Affiliation(s)
- Ana Isabel Álvarez-Mercado
- Department of Biochemistry and Molecular Biology II, School of Pharmacy, Granada, Spain.,Institute of Nutrition and Food Technology "José Mataix", Biomedical Research Center, Parque Tecnológico Ciencias de la Salud, Granada, Spain.,Instituto de Investigación Biosanitaria ibs. GRANADA, Complejo Hospitalario Universitario de Granada, Granada, Spain
| | - Carlos Rojano-Alfonso
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Marc Micó-Carnero
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | | | - Carmen Peralta
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Araní Casillas-Ramírez
- Hospital Regional de Alta Especialidad de Ciudad Victoria "Bicentenario 2010", Ciudad Victoria, Mexico.,Facultad de Medicina e Ingeniería en Sistemas Computacionales de Matamoros, Universidad Autónoma de Tamaulipas, Matamoros, Mexico
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13
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Lv S, Wang Z, Wang J, Wang H. Exogenous Hydrogen Sulfide Plays an Important Role Through Regulating Autophagy in Ischemia/Reperfusion Injury. Front Mol Biosci 2021; 8:681676. [PMID: 34055892 PMCID: PMC8155623 DOI: 10.3389/fmolb.2021.681676] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 04/19/2021] [Indexed: 12/12/2022] Open
Abstract
Ischemia/reperfusion (I/R) injury is characterized by limiting blood supply to organs, then restoring blood flow and reoxygenation. It leads to many diseases, including acute kidney injury, myocardial infarction, circulatory arrest, ischemic stroke, trauma, and sickle cell disease. Autophagy is an important and conserved cellular pathway, in which cells transfer the cytoplasmic contents to lysosomes for degradation. It plays an important role in maintaining the balance of cell synthesis, decomposition and reuse, and participates in a variety of physiological and pathological processes. Hydrogen sulfide (H2S), along with carbon monoxide (CO) and nitric oxide (NO), is an important gas signal molecule and regulates various physiological and pathological processes. In recent years, there are many studies on the improvement of I/R injury by H2S through regulating autophagy, but the related mechanisms are not completely clear. Therefore, we summarize the related research in the above aspects to provide theoretical reference for future in-depth research.
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Affiliation(s)
- Shuangyu Lv
- Henan International Joint Laboratory for Nuclear Protein Regulation, School of Basic Medical Sciences, Henan University, Kaifeng, China
| | - Zhu Wang
- Henan Technician College of Medicine and Health, Kaifeng, China
| | - Jie Wang
- Henan International Joint Laboratory for Nuclear Protein Regulation, School of Basic Medical Sciences, Henan University, Kaifeng, China
| | - Honggang Wang
- Henan International Joint Laboratory for Nuclear Protein Regulation, School of Basic Medical Sciences, Henan University, Kaifeng, China
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14
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Wu D, Zhong P, Wang Y, Zhang Q, Li J, Liu Z, Ji A, Li Y. Hydrogen Sulfide Attenuates High-Fat Diet-Induced Non-Alcoholic Fatty Liver Disease by Inhibiting Apoptosis and Promoting Autophagy via Reactive Oxygen Species/Phosphatidylinositol 3-Kinase/AKT/Mammalian Target of Rapamycin Signaling Pathway. Front Pharmacol 2020; 11:585860. [PMID: 33390956 PMCID: PMC7774297 DOI: 10.3389/fphar.2020.585860] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 10/29/2020] [Indexed: 12/12/2022] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is a common chronic liver disease worldwide. Hydrogen sulfide (H2S) is involved in a wide range of physiological and pathological processes. Nevertheless, the mechanism of action of H2S in NAFLD development has not been fully clarified. Here, the reduced level of H2S was observed in liver cells treated with oleic acid (OA). Administration of H2S increased the proliferation of OA-treated cells. The results showed that H2S decreased apoptosis and promoted autophagy through reactive oxygen species (ROS)-mediated phosphatidylinositol 3-kinase (PI3K)/AKT/mammalian target of rapamycin (mTOR) cascade in OA-treated cells. In addition, administration of H2S relieved high-fat diet (HFD)-induced NAFLD via inhibition of apoptosis and promotion of autophagy. These findings suggest that H2S could ameliorate HFD-induced NAFLD by regulating apoptosis and autophagy through ROS/PI3K/AKT/mTOR signaling pathway. Novel H2S-releasing donors may have therapeutic potential for the treatment of NAFLD.
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Affiliation(s)
- Dongdong Wu
- School of Basic Medical Sciences, Henan University, Kaifeng, China.,Henan International Joint Laboratory for Nuclear Protein Regulation, Henan University, Kaifeng, China.,School of Stomatology, Henan University, Kaifeng, China
| | - Peiyu Zhong
- School of Basic Medical Sciences, Henan University, Kaifeng, China.,Henan International Joint Laboratory for Nuclear Protein Regulation, Henan University, Kaifeng, China
| | - Yizhen Wang
- School of Basic Medical Sciences, Henan University, Kaifeng, China.,Henan International Joint Laboratory for Nuclear Protein Regulation, Henan University, Kaifeng, China
| | - Qianqian Zhang
- School of Basic Medical Sciences, Henan University, Kaifeng, China.,Henan International Joint Laboratory for Nuclear Protein Regulation, Henan University, Kaifeng, China
| | - Jianmei Li
- School of Basic Medical Sciences, Henan University, Kaifeng, China.,Henan International Joint Laboratory for Nuclear Protein Regulation, Henan University, Kaifeng, China
| | - Zhengguo Liu
- School of Basic Medical Sciences, Henan University, Kaifeng, China.,Henan International Joint Laboratory for Nuclear Protein Regulation, Henan University, Kaifeng, China
| | - Ailing Ji
- School of Basic Medical Sciences, Henan University, Kaifeng, China.,Henan International Joint Laboratory for Nuclear Protein Regulation, Henan University, Kaifeng, China
| | - Yanzhang Li
- School of Basic Medical Sciences, Henan University, Kaifeng, China.,Henan International Joint Laboratory for Nuclear Protein Regulation, Henan University, Kaifeng, China
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15
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Dilek N, Papapetropoulos A, Toliver-Kinsky T, Szabo C. Hydrogen sulfide: An endogenous regulator of the immune system. Pharmacol Res 2020; 161:105119. [PMID: 32781284 DOI: 10.1016/j.phrs.2020.105119] [Citation(s) in RCA: 128] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 07/30/2020] [Accepted: 07/30/2020] [Indexed: 12/12/2022]
Abstract
Hydrogen sulfide (H2S) is now recognized as an endogenous signaling gasotransmitter in mammals. It is produced by mammalian cells and tissues by various enzymes - predominantly cystathionine β-synthase (CBS), cystathionine γ-lyase (CSE) and 3-mercaptopyruvate sulfurtransferase (3-MST) - but part of the H2S is produced by the intestinal microbiota (colonic H2S-producing bacteria). Here we summarize the available information on the production and functional role of H2S in the various cell types typically associated with innate immunity (neutrophils, macrophages, dendritic cells, natural killer cells, mast cells, basophils, eosinophils) and adaptive immunity (T and B lymphocytes) under normal conditions and as it relates to the development of various inflammatory and immune diseases. Special attention is paid to the physiological and the pathophysiological aspects of the oral cavity and the colon, where the immune cells and the parenchymal cells are exposed to a special "H2S environment" due to bacterial H2S production. H2S has many cellular and molecular targets. Immune cells are "surrounded" by a "cloud" of H2S, as a result of endogenous H2S production and exogenous production from the surrounding parenchymal cells, which, in turn, importantly regulates their viability and function. Downregulation of endogenous H2S producing enzymes in various diseases, or genetic defects in H2S biosynthetic enzyme systems either lead to the development of spontaneous autoimmune disease or accelerate the onset and worsen the severity of various immune-mediated diseases (e.g. autoimmune rheumatoid arthritis or asthma). Low, regulated amounts of H2S, when therapeutically delivered by small molecule donors, improve the function of various immune cells, and protect them against dysfunction induced by various noxious stimuli (e.g. reactive oxygen species or oxidized LDL). These effects of H2S contribute to the maintenance of immune functions, can stimulate antimicrobial defenses and can exert anti-inflammatory therapeutic effects in various diseases.
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Affiliation(s)
- Nahzli Dilek
- Chair of Pharmacology, Section of Medicine, University of Fribourg, Switzerland
| | - Andreas Papapetropoulos
- Laboratory of Pharmacology, Faculty of Pharmacy, National and Kapodistrian University of Athens, Greece
| | - Tracy Toliver-Kinsky
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, TX, USA
| | - Csaba Szabo
- Chair of Pharmacology, Section of Medicine, University of Fribourg, Switzerland; Department of Anesthesiology, University of Texas Medical Branch, Galveston, TX, USA.
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Sun HJ, Wu ZY, Nie XW, Wang XY, Bian JS. Implications of hydrogen sulfide in liver pathophysiology: Mechanistic insights and therapeutic potential. J Adv Res 2020; 27:127-135. [PMID: 33318872 PMCID: PMC7728580 DOI: 10.1016/j.jare.2020.05.010] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 05/06/2020] [Accepted: 05/07/2020] [Indexed: 02/07/2023] Open
Abstract
Background Over the last several decades, hydrogen sulfide (H2S) has been found to exert multiple physiological functions in mammal systems. The endogenous production of H2S is primarily mediated by cystathione β-synthase (CBS), cystathione γ-lyase (CSE), and 3-mercaptopyruvate sulfurtransferase (3-MST). These enzymes are widely expressed in the liver tissues and regulate hepatic functions by acting on various molecular targets. Aim of Review In the present review, we will highlight the recent advancements in the cellular events triggered by H2S under liver diseases. The therapeutic effects of H2S donors on hepatic diseases will also be discussed. Key Scientific Concepts of Review As a critical regulator of liver functions, H2S is critically involved in the etiology of various liver disorders, such as nonalcoholic steatohepatitis (NASH), hepatic fibrosis, hepatic ischemia/reperfusion (IR) injury, and liver cancer. Targeting H2S-producing enzymes may be a promising strategy for managing hepatic disorders.
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Key Words
- 3-MP, 3-mercaptopyruvate
- 3-MST, 3-mercaptopyruvate sulfurtransferase
- AGTR1, angiotensin II type 1 receptor
- AMPK, AMP-activated protein kinase
- Akt, protein kinase B
- CAT, cysteine aminotransferase
- CBS, cystathione β-synthase
- CO, carbon monoxide
- COX-2, cyclooxygenase-2
- CSE, cystathione γ-lyase
- CX3CR1, chemokine CX3C motif receptor 1
- Cancer
- DAO, D-amino acid oxidase
- DATS, Diallyl trisulfide
- EGFR, epidermal growth factor receptor
- ERK, extracellular regulated protein kinases
- FAS, fatty acid synthase
- Fibrosis
- H2S, hydrogen sulfide
- HFD, high fat diet
- HO-1, heme oxygenase 1
- Hydrogen sulfide
- IR, ischemia/reperfusion
- Liver disease
- MMP-2, matrix metalloproteinase 2
- NADH, nicotinamide adenine dinucleotide
- NADPH, nicotinamide adenine dinucleotide phosphate
- NAFLD, non-alcoholic fatty liver diseases
- NASH, nonalcoholic steatohepatitis
- NF-κB, nuclear factor-kappa B
- NaHS, sodium hydrosulfide
- Nrf2, nuclear factor erythroid2-related factor 2
- PI3K, phosphatidylinositol 3-kinase
- PLP, pyridoxal 5′-phosphate
- PPG, propargylglycine
- PTEN, phosphatase and tensin homolog deleted on chromosome ten
- SAC, S-allyl-cysteine
- SPRC, S-propargyl-cysteine
- STAT3, signal transducer and activator of transcription 3
- Steatosis
- VLDL, very low density lipoprotein
- mTOR, mammalian target of rapamycin
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Affiliation(s)
- Hai-Jian Sun
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, 117597, Singapore
| | - Zhi-Yuan Wu
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, 117597, Singapore
| | - Xiao-Wei Nie
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, 117597, Singapore
| | - Xin-Yu Wang
- Department of Endocrinology, The First Affiliated Hospital of Shenzhen University (Shenzhen Second People's Hospital), Shenzhen 518037, China
| | - Jin-Song Bian
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, 117597, Singapore.,National University of Singapore Research Institute, Suzhou 215000, China
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PERK Overexpression-Mediated Nrf2/HO-1 Pathway Alleviates Hypoxia/Reoxygenation-Induced Injury in Neonatal Murine Cardiomyocytes via Improving Endoplasmic Reticulum Stress. BIOMED RESEARCH INTERNATIONAL 2020; 2020:6458060. [PMID: 32309436 PMCID: PMC7136769 DOI: 10.1155/2020/6458060] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 01/20/2020] [Accepted: 01/27/2020] [Indexed: 12/14/2022]
Abstract
Reperfusion processes following acute myocardial infarction (AMI) have been reported to induce additional cardiomyocyte death, known as ischemia-reperfusion (I/R) injury. Endoplasmic reticulum (ER) stress is reported to be involved in the development of I/R injury. There is evidence that PERK exerts beneficial roles in alleviating ER stress. Here, we investigated whether upregulation of PERK improved cardiomyocytes injury induced by I/R. Specific siRNAs or adenovirus vectors were incubated with isolated neonatal cardiomyocytes (NCMs) to regulate expression levels of target genes including PERK, Nrf2, and HO-1. Afterwards, hypoxia and subsequent reoxygenation (H/R) administration was performed as the in vitro model of I/R injury. MTT assay showed that H/R intervention decreased the viability of cells, yet PERK overexpression increased the cellular proliferative rate. Moreover, the upregulation of Nrf2 or HO-1 elevated the growth rate of cells, while gene silencing of Nrf2 or HO-1 reduced the viability of NCMs treated with PERK-rAAV9. In addition, we observed that the apoptotic index of cells with H/R stimulation was reduced when NCMs were pretreated with PERK-rAAV9, Nrf2-rAAV9, or HO-1-rAAV9. After cells were incubated with Nrf2-siRNA or HO-1-siRNA, the upregulation of PERK had no roles in affecting the apoptosis rate of NCMs damaged by H/R. Then, our findings indicated that there was a level decrease of GRP78, CRT, CHOP, and Caspase-12 in NCMs of the PERK-rAAV9 group compared to that of the H/R group. Both Nrf2 overexpression and HO-1 upregulation reduced the expression of ER stress-related proapoptotic factors, yet the expression suppression of Nrf2 and HO-1 increased levels of GRP78, CRT, CHOP, and Caspase-12 in NCMs treated with PERK-rAAV9. Taken together, our results suggested that the effects of PERK against H/R injury might be attributed to the upregulation of Nrf2/HO-1 cascade, followed by the inhibition of ER stress-related apoptotic pathway.
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