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Zhao J, Li L, Wang X, Shen J. KN-93 promotes HDAC4 nucleus translocation to promote fatty acid oxidation in myocardial infarction. Exp Cell Res 2024; 438:114050. [PMID: 38663474 DOI: 10.1016/j.yexcr.2024.114050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 02/23/2024] [Accepted: 04/13/2024] [Indexed: 04/30/2024]
Abstract
Myocardial infarction (MI) is a potentially fatal disease that causes a significant number of deaths worldwide. The strategy of increasing fatty acid oxidation in myocytes is considered a therapeutic avenue to accelerate metabolism to meet energy demands. We conducted the study aiming to investigate the effect of KN-93, which induces histone deacetylase (HDAC)4 shuttling to the nucleus, on fatty acid oxidation and the expression of related genes. A mouse model of myocardial infarction was induced by isoprenaline administration. Heart damage was assessed by the detection of cardiac injury markers. The level of fatty acid oxidation level was evaluated by testing the expression of related genes. Both immunofluorescence and immunoblotting in the cytosol or nucleus were utilized to observe the distribution of HDAC4. The interaction between HDAC4 and specificity protein (SP)1 was confirmed by co-immunoprecipitation. The acetylation level of SP1 was tested after KN-93 treatment and HDAC4 inhibitor. Oxygen consumption rate and immunoblotting experiments were used to determine whether the effect of KN-93 on increasing fatty acid oxidation is through HDAC4 and SP1. Administration of KN-93 significantly reduced cardiac injury in myocardial infarction and promoted fatty acid oxidation both in vitro and in vivo. KN-93 was shown to mediate nuclear translocation of HDAC4. HDAC4 was found to interact with SP1 and reduce SP1 acetylation. HDAC4 or SP1 inhibitors attenuated the effect of KN-93 on fatty acid oxidation. In conclusion, KN-93 promotes HDAC4 translocation to the nucleus, thereby potentially enhancing fatty acid oxidation by SP1.
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Affiliation(s)
- Jianqiao Zhao
- Department of Cardiology, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, China
| | - Luona Li
- Department of Gastronomy, Nanjing Drum Tower Hospital, China
| | - Xindong Wang
- Department of Cardiology, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, China
| | - Jianping Shen
- Department of Cardiology, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, China.
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2
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Wang J, Jiang J, Hu H, Chen L. MCU complex: Exploring emerging targets and mechanisms of mitochondrial physiology and pathology. J Adv Res 2024:S2090-1232(24)00075-4. [PMID: 38417574 DOI: 10.1016/j.jare.2024.02.013] [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: 11/16/2023] [Revised: 02/16/2024] [Accepted: 02/17/2024] [Indexed: 03/01/2024] Open
Abstract
BACKGROUND Globally, the onset and progression of multiple human diseases are associated with mitochondrial dysfunction and dysregulation of Ca2+ uptake dynamics mediated by the mitochondrial calcium uniporter (MCU) complex, which plays a key role in mitochondrial dysfunction. Despite relevant studies, the underlying pathophysiological mechanisms have not yet been fully elucidated. AIM OF REVIEW This article provides an in-depth analysis of the current research status of the MCU complex, focusing on its molecular composition, regulatory mechanisms, and association with diseases. In addition, we conducted an in-depth analysis of the regulatory effects of agonists, inhibitors, and traditional Chinese medicine (TCM) monomers on the MCU complex and their application prospects in disease treatment. From the perspective of medicinal chemistry, we conducted an in-depth analysis of the structure-activity relationship between these small molecules and MCU and deduced potential pharmacophores and binding pockets. Simultaneously, key structural domains of the MCU complex in Homo sapiens were identified. We also studied the functional expression of the MCU complex in Drosophila, Zebrafish, and Caenorhabditis elegans. These analyses provide a basis for exploring potential treatment strategies targeting the MCU complex and provide strong support for the development of future precision medicine and treatments. KEY SCIENTIFIC CONCEPTS OF REVIEW The MCU complex exhibits varying behavior across different tissues and plays various roles in metabolic functions. It consists of six MCU subunits, an essential MCU regulator (EMRE), and solute carrier 25A23 (SLC25A23). They regulate processes, such as mitochondrial Ca2+ (mCa2+) uptake, mitochondrial adenosine triphosphate (ATP) production, calcium dynamics, oxidative stress (OS), and cell death. Regulation makes it a potential target for treating diseases, especially cardiovascular diseases, neurodegenerative diseases, inflammatory diseases, metabolic diseases, and tumors.
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Affiliation(s)
- Jin Wang
- Institute of Pharmacy and Pharmacology, Learning Key Laboratory for Pharmacoproteomics, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, School of Pharmaceutical Science, Hengyang Medical College, University of South China, Hengyang 421001, China
| | - Jinyong Jiang
- Department of Pharmacy, The First Affiliated Hospital of Jishou University, Jishou 416000, China
| | - Haoliang Hu
- Institute of Pharmacy and Pharmacology, Learning Key Laboratory for Pharmacoproteomics, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, School of Pharmaceutical Science, Hengyang Medical College, University of South China, Hengyang 421001, China; College of Medicine, Hunan University of Arts and Science, Changde 415000, China.
| | - Linxi Chen
- Institute of Pharmacy and Pharmacology, Learning Key Laboratory for Pharmacoproteomics, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, School of Pharmaceutical Science, Hengyang Medical College, University of South China, Hengyang 421001, China.
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3
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Hao M, Han X, Yao Z, Zhang H, Zhao M, Peng M, Wang K, Shan Q, Sang X, Wu X, Wang L, Lv Q, Yang Q, Bao Y, Kuang H, Zhang H, Cao G. The pathogenesis of organ fibrosis: Focus on necroptosis. Br J Pharmacol 2023; 180:2862-2879. [PMID: 36111431 DOI: 10.1111/bph.15952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 07/20/2022] [Accepted: 07/28/2022] [Indexed: 11/29/2022] Open
Abstract
Fibrosis is a common process of tissue repair response to multiple injuries in all chronic progressive diseases, which features with excessive deposition of extracellular matrix. Fibrosis can occur in all organs and tends to be nonreversible with the progress of the disease. Different cells types in different organs are involved in the occurrence and development of fibrosis, that is, hepatic stellate cells, pancreatic stellate cells, fibroblasts and myofibroblasts. Various types of programmed cell death, including apoptosis, autophagy, ferroptosis and necroptosis, are closely related to organ fibrosis. Among these programmed cell death types, necroptosis, an emerging regulated cell death type, is regarded as a huge potential target to ameliorate organ fibrosis. In this review, we summarize the role of necroptosis signalling in organ fibrosis and collate the small molecule compounds targeting necroptosis. In addition, we discuss the potential challenges, opportunities and open questions in using necroptosis signalling as a potential target for antifibrotic therapies. LINKED ARTICLES: This article is part of a themed issue on Translational Advances in Fibrosis as a Therapeutic Target. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v180.22/issuetoc.
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Affiliation(s)
- Min Hao
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Xin Han
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Zhouhui Yao
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Han Zhang
- The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Mengting Zhao
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Mengyun Peng
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Kuilong Wang
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Qiyuan Shan
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Xianan Sang
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Xin Wu
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Lu Wang
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Qiang Lv
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Qiao Yang
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yini Bao
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Haodan Kuang
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
| | - Hongyan Zhang
- Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, China
| | - Gang Cao
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
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4
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Zhang J, Wei Z, Qi X, Hou X, Liu D, He J. Integrative proteomics, phosphoproteomics and acetylation proteomics analyses of acute pancreatitis in rats. Int J Med Sci 2023; 20:888-900. [PMID: 37324185 PMCID: PMC10266050 DOI: 10.7150/ijms.81658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 04/27/2023] [Indexed: 06/17/2023] Open
Abstract
Acute pancreatitis (AP) is a common acute abdominalgia of the digestive tract. When the disease progresses to severe acute pancreatitis (SAP), the complications and mortality rate greatly increase. Determining the key factors and pathways underlying AP and SAP will help elucidate the pathological processes involved in disease progression and will be beneficial for identifying potential therapeutic targets. We conducted an integrative proteomics, phosphoproteomics and acetylation proteomics analysis of pancreas samples collected from normal, AP and SAP rat models. We identified 9582 proteins, 3130 phosphorylated modified proteins, and 1677 acetylated modified proteins across all samples. The differentiated expression proteins and KEGG pathway analysis suggested the pronounced enrichment of key pathways based on the following group comparisons: AP versus normal, SAP versus normal, and SAP versus AP. Integrative proteomics and phosphoproteomics analyses revealed 985 jointly detected proteins in the comparison of AP and normal samples, 911 proteins in the comparison of SAP and normal samples, and 910 proteins in the comparison of SAP and AP samples. Based on proteomics and acetylation proteomics analyses, we found that 984 proteins were jointly detected in the comparison of AP and normal samples, 990 proteins in SAP and normal samples, and 728 proteins in SAP and AP samples. Thus, our study offers a valuable resource to understand the proteomic and protein modification atlas in AP.
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Affiliation(s)
| | | | | | | | | | - Jun He
- ✉ Corresponding author: Jun He, PhD, Department of General Surgery, Second Xiangya Hospital, Central South University, 139 Renmin Road, Changsha, Hunan 410011, China. Email address:
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5
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Han F, Chen H, Chen L, Yuan C, Shen Q, Lu G, Chen W, Gong W, Ding Y, Gu A, Tao L. Inhibition of Gasdermin D blocks the formation of NETs and protects acute pancreatitis in mice. Biochem Biophys Res Commun 2023; 654:26-33. [PMID: 36889032 DOI: 10.1016/j.bbrc.2023.02.082] [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: 02/11/2023] [Revised: 02/18/2023] [Accepted: 02/28/2023] [Indexed: 03/05/2023]
Abstract
The persistent activation of neutrophils and the excessive neutrophil extracellular traps (NETs) formation are the main determinants of pancreatic tissue injury and systemic inflammatory response in acute pancreatitis (AP). Thus, inhibiting the release of NETs can effectively prevent the aggravation of AP. Here, our study showed that the pore-forming protein gasdermin D (GSDMD) was activity in neutrophils of AP mice and patients and played the vital role in NETs formation. Through the application of GSDMD inhibitor or the construction of neutrophil GSDMD specific knockout mice, it was found in vivo and in vitro that inhibition of GSDMD could block the NETs formation, reduce pancreatic injury, systemic inflammatory reaction and organ failure in AP mice. To sum up, our findings confirmed that neutrophil GSDMD was the therapeutic target for improving the occurrence and development of AP.
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Affiliation(s)
- Fei Han
- Dalian Medical University, Dalian, 116044, Liaoning, China; Pancreatic Center, Department of Gastroenterology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225100, Jiangsu, China; Yangzhou Key Laboratory of Pancreatic Disease, Institute of Digestive Diseases, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225100, Jiangsu, China
| | - Hao Chen
- Dalian Medical University, Dalian, 116044, Liaoning, China; The First Affiliated Hospital of Dalian Medical University, Dalian, 116044, Liaoning, China
| | - Lin Chen
- Pancreatic Center, Department of Gastroenterology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225100, Jiangsu, China; Yangzhou Key Laboratory of Pancreatic Disease, Institute of Digestive Diseases, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225100, Jiangsu, China
| | - Chenchen Yuan
- Pancreatic Center, Department of Gastroenterology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225100, Jiangsu, China; Yangzhou Key Laboratory of Pancreatic Disease, Institute of Digestive Diseases, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225100, Jiangsu, China
| | - Qinhao Shen
- Pancreatic Center, Department of Gastroenterology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225100, Jiangsu, China; Yangzhou Key Laboratory of Pancreatic Disease, Institute of Digestive Diseases, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225100, Jiangsu, China
| | - Guotao Lu
- Pancreatic Center, Department of Gastroenterology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225100, Jiangsu, China; Yangzhou Key Laboratory of Pancreatic Disease, Institute of Digestive Diseases, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225100, Jiangsu, China
| | - Weiwei Chen
- Department of Gastroenterology, Northern Jiangsu People's Hospital Affiliated to Yangzhou University, Yangzhou University, Yangzhou, 225000, Jiangsu, China
| | - Weijuan Gong
- Pancreatic Center, Department of Gastroenterology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225100, Jiangsu, China; Yangzhou Key Laboratory of Pancreatic Disease, Institute of Digestive Diseases, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225100, Jiangsu, China
| | - Yanbing Ding
- Dalian Medical University, Dalian, 116044, Liaoning, China; Pancreatic Center, Department of Gastroenterology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225100, Jiangsu, China; Yangzhou Key Laboratory of Pancreatic Disease, Institute of Digestive Diseases, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225100, Jiangsu, China.
| | - Aidong Gu
- Department of Hepatobiliary Surgery, The Second Hospital of Nanjing, Nanjing University of Chinese Medicine, Nanjing, 210003, Jiangsu, China.
| | - Lide Tao
- Department of Surgery, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225100, Jiangsu, China.
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Peng C, Tu G, Wang J, Wang Y, Wu P, Yu L, Li Z, Yu X. MLKL signaling regulates macrophage polarization in acute pancreatitis through CXCL10. Cell Death Dis 2023; 14:155. [PMID: 36828808 PMCID: PMC9958014 DOI: 10.1038/s41419-023-05655-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 01/30/2023] [Accepted: 02/03/2023] [Indexed: 02/26/2023]
Abstract
Acute pancreatitis (AP) is a disease characterized by local and systemic inflammation with an increasing incidence worldwide. Receptor-interacting serine/threonine protein kinase 3 (RIPK3), mixed-lineage kinase domain-like protein (MLKL), and innate immune cell macrophages have been reported to be involved in the pathogenesis of AP. However, the mechanisms by which RIPK3 and MLKL regulate pancreatic injury, as well as the interactions between injured pancreatic acinar cells and infiltrating macrophages in AP, remain poorly defined. In the present study, experimental pancreatitis was induced in C57BL/6J, Ripk3-/- and Mlkl-/- mice by cerulein plus lipopolysaccharide in vivo, and primary pancreatic acinar cells were also isolated to uncover cellular mechanisms during cerulein stimulation in vitro. The results showed that MLKL and its phosphorylated protein p-MLKL were upregulated in the pancreas of the mouse AP model and cerulein-treated pancreatic acinar cells, independent of its canonical upstream molecule Ripk3, and appeared to function in a cell death-independent manner. Knockout of Mlkl attenuated AP in mice by reducing the polarization of pancreatic macrophages toward the M1 phenotype, and this protective effect was partly achieved by reducing the secretion of CXCL10 from pancreatic acinar cells, whereas knockout of Ripk3 did not. In vitro neutralization of CXCL10 impaired the pro-M1 ability of the conditioned medium of cerulein-treated pancreatic acinar cells, whereas in vivo neutralization of CXCL10 reduced the polarization of pancreatic macrophages toward M1 and the severity of AP in mice. These findings suggested that targeting the MLKL-CXCL10-macrophage axis might be a promising strategy for the treatment of AP.
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Affiliation(s)
- Cheng Peng
- Department of Hepatopancreatobiliary Surgery, Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, China
| | - Guangping Tu
- Department of Hepatopancreatobiliary Surgery, Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, China
| | - Jiale Wang
- Department of Hepatopancreatobiliary Surgery, Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, China
| | - Yilin Wang
- Department of Hepatopancreatobiliary Surgery, Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, China
| | - Peng Wu
- Department of Hepatopancreatobiliary Surgery, Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, China
| | - Li Yu
- Department of Radiology, Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, China
| | - Zhiqiang Li
- Department of Hepatopancreatobiliary Surgery, Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, China.
| | - Xiao Yu
- Department of Hepatopancreatobiliary Surgery, Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, China.
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Yu X, Dai C, Zhao X, Huang Q, He X, Zhang R, Lin Z, Shen Y. Ruthenium red attenuates acute pancreatitis by inhibiting MCU and improving mitochondrial function. Biochem Biophys Res Commun 2022; 635:236-243. [DOI: 10.1016/j.bbrc.2022.10.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 09/28/2022] [Accepted: 10/12/2022] [Indexed: 11/16/2022]
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Zearalenone Induces MLKL-Dependent Necroptosis in Goat Endometrial Stromal Cells via the Calcium Overload/ROS Pathway. Int J Mol Sci 2022; 23:ijms231710170. [PMID: 36077566 PMCID: PMC9456174 DOI: 10.3390/ijms231710170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 08/28/2022] [Accepted: 09/01/2022] [Indexed: 11/30/2022] Open
Abstract
Zearalenone (ZEA) is a fungal mycotoxin known to exert strong reproductive toxicity in animals. As a newly identified type of programmed cell death, necroptosis is regulated by receptor-interacting protein kinase 1 (RIPK1), receptor-interacting protein kinase 3 (RIPK3), and mixed-lineage kinase domain-like pseudokinase (MLKL). However, the role and mechanism of necroptosis in ZEA toxicity remain unclear. In this study, we confirmed the involvement of necroptosis in ZEA-induced cell death in goat endometrial stromal cells (gESCs). The release of lactate dehydrogenase (LDH) and the production of PI-positive cells markedly increased. At the same time, the expression of RIPK1 and RIPK3 mRNAs and P-RIPK3 and P-MLKL proteins were significantly upregulated in ZEA-treated gESCs. Importantly, the MLKL inhibitor necrosulfonamide (NSA) dramatically attenuated gESCs necroptosis and powerfully blocked ZEA-induced reactive oxygen species (ROS) generation and mitochondrial dysfunction. The reactive oxygen species (ROS) scavengers and N-acetylcysteine (NAC) inhibited ZEA-induced cell death. In addition, the inhibition of MLKL alleviated the intracellular Ca2+ overload caused by ZEA. The calcium chelator BAPTA-AM markedly suppressed ROS production and mitochondrial damage, thus inhibiting ZEA-induced necroptosis. Therefore, our results revealed the mechanism by which ZEA triggers gESCs necroptosis, which may provide a new therapeutic strategy for ZEA poisoning.
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Understanding Necroptosis in Pancreatic Diseases. Biomolecules 2022; 12:biom12060828. [PMID: 35740953 PMCID: PMC9221205 DOI: 10.3390/biom12060828] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Revised: 06/02/2022] [Accepted: 06/08/2022] [Indexed: 12/12/2022] Open
Abstract
Intermediate between apoptosis and necrosis, necroptosis is a regulated caspase-independent programmed cell death that induces an inflammatory response and mediates cancer development. As our understanding improves, its role in the physiopathology of numerous diseases, including pancreatic diseases, has been reconsidered, and especially in pancreatitis and pancreatic cancer. However, the exact pathogenesis remains elusive, even though some studies have been conducted on these diseases. Its unique mechanisms of action in diseases are expected to bring prospects for the treatment of pancreatic diseases. Therefore, it is imperative to further explore its molecular mechanism in pancreatic diseases in order to identify novel therapeutic options. This article introduces recent related research on necroptosis and pancreatic diseases, explores necroptosis-related molecular pathways, and provides a theoretical foundation for new therapeutic targets for pancreatic diseases.
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Triptolide Suppresses NF-κB-Mediated Inflammatory Responses and Activates Expression of Nrf2-Mediated Antioxidant Genes to Alleviate Caerulein-Induced Acute Pancreatitis. Int J Mol Sci 2022; 23:ijms23031252. [PMID: 35163177 PMCID: PMC8835869 DOI: 10.3390/ijms23031252] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 01/20/2022] [Accepted: 01/21/2022] [Indexed: 12/12/2022] Open
Abstract
Triptolide (TP), the main active ingredient of Tripterygium wilfordii Hook.f., displays potent anti-inflammatory, antioxidant, and antiproliferative activities. In the present study, the effect of TP on acute pancreatitis and the underlying mechanisms of the disease were investigated using a caerulein-induced animal model of acute pancreatitis (AP) and an in vitro cell model. In vivo, pretreatment with TP notably ameliorated pancreatic damage, shown as the improvement in serum amylase and lipase levels and pancreatic morphology. Meanwhile, TP modulated the infiltration of neutrophils and macrophages (Ly6G staining and CD68 staining) and decreased the levels of proinflammatory factors (TNF-α and IL-6) through inhibiting the transactivation of nuclear factor-κB (NF-κB) in caerulein-treated mice. Furthermore, TP reverted changes in oxidative stress markers, including pancreatic glutathione (GSH), superoxide dismutase (SOD), and malondialdehyde (MDA), in acute pancreatitis mice. Additionally, TP pretreatment inhibited intracellular reactive oxygen species (ROS) levels via upregulated nuclear factor erythroid 2-related factor 2 (Nrf2) expression and Nrf2-regulated redox genes expression (HO-1, SOD1, GPx1 and NQO1) in vitro. Taken together, our data suggest that TP exert protection against pancreatic inflammation and tissue damage by inhibiting NF-κB transactivation, modulating immune cell responses and activating the Nrf2-mediated antioxidative system, thereby alleviating acute pancreatitis.
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