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Gao S, Shen R, Li J, Jiang Y, Sun H, Wu X, Li X, Miao C, He M, Wang J, Chen W. N-acetyltransferase 10 mediates cognitive dysfunction through the acetylation of GABA BR1 mRNA in sepsis-associated encephalopathy. Proc Natl Acad Sci U S A 2024; 121:e2410564121. [PMID: 39190359 PMCID: PMC11388286 DOI: 10.1073/pnas.2410564121] [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: 06/01/2024] [Accepted: 07/30/2024] [Indexed: 08/28/2024] Open
Abstract
Sepsis-associated encephalopathy (SAE) is a critical neurological complication of sepsis and represents a crucial factor contributing to high mortality and adverse prognosis in septic patients. This study explored the contribution of NAT10-mediated messenger RNA (mRNA) acetylation in cognitive dysfunction associated with SAE, utilizing a cecal ligation and puncture (CLP)-induced SAE mouse model. Our findings demonstrate that CLP significantly upregulates NAT10 expression and mRNA acetylation in the excitatory neurons of the hippocampal dentate gyrus (DG). Notably, neuronal-specific Nat10 knockdown improved cognitive function in septic mice, highlighting its critical role in SAE. Proteomic analysis, RNA immunoprecipitation, and real-time qPCR identified GABABR1 as a key downstream target of NAT10. Nat10 deletion reduced GABABR1 expression, and subsequently weakened inhibitory postsynaptic currents in hippocampal DG neurons. Further analysis revealed that microglia activation and the release of inflammatory mediators lead to the increased NAT10 expression in neurons. Microglia depletion with PLX3397 effectively reduced NAT10 and GABABR1 expression in neurons, and ameliorated cognitive dysfunction induced by SAE. In summary, our findings revealed that after CLP, NAT10 in hippocampal DG neurons promotes GABABR1 expression through mRNA acetylation, leading to cognitive dysfunction.
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Affiliation(s)
- Shenjia Gao
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai 200032, China
| | - Ruling Shen
- Shanghai Laboratory Animal Research Center, Shanghai 201203, China
| | - Jie Li
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and Ministry of Education (MOE) Frontiers Center for Brain Science, Shanghai 200032, China
- Department of Neurobiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Yi Jiang
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai 200032, China
| | - Hao Sun
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai 200032, China
| | - Xinyi Wu
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai 200032, China
| | - Xiya Li
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai 200032, China
| | - Changhong Miao
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai 200032, China
| | - Miao He
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and Ministry of Education (MOE) Frontiers Center for Brain Science, Shanghai 200032, China
- Department of Neurobiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Jun Wang
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Science, Shanghai Key Laboratory of Acupuncture Mechanism and Acupoint Function, Fudan University, Shanghai 200032, China
| | - Wankun Chen
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai 200032, China
- Department of Anesthesiology, Shanghai Geriatric Medical Center, Shanghai 201104, China
- Department of Anesthesiology, QingPu Branch of Zhongshan Hospital, Fudan University, Shanghai 201799, China
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Lu L, Jifu C, Xia J, Wang J. E3 ligases and DUBs target ferroptosis: A potential therapeutic strategy for neurodegenerative diseases. Biomed Pharmacother 2024; 175:116753. [PMID: 38761423 DOI: 10.1016/j.biopha.2024.116753] [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: 03/14/2024] [Revised: 04/30/2024] [Accepted: 05/10/2024] [Indexed: 05/20/2024] Open
Abstract
Ferroptosis is a form of cell death mediated by iron and lipid peroxidation (LPO). Recent studies have provided compelling evidence to support the involvement of ferroptosis in the pathogenesis of various neurodegenerative diseases (NDDs), such as Alzheimer's disease (AD), Parkinson's disease (PD). Therefore, understanding the mechanisms that regulate ferroptosis in NDDs may improve disease management. Ferroptosis is regulated by multiple mechanisms, and different degradation pathways, including autophagy and the ubiquitinproteasome system (UPS), orchestrate the complex ferroptosis response by directly or indirectly regulating iron accumulation or lipid peroxidation. Ubiquitination plays a crucial role as a protein posttranslational modification in driving ferroptosis. Notably, E3 ubiquitin ligases (E3s) and deubiquitinating enzymes (DUBs) are key enzymes in the ubiquitin system, and their dysregulation is closely linked to the progression of NDDs. A growing body of evidence highlights the role of ubiquitin system enzymes in regulating ferroptosis sensitivity. However, reports on the interaction between ferroptosis and ubiquitin signaling in NDDs are scarce. In this review, we first provide a brief overview of the biological processes and roles of the UPS, summarize the core molecular mechanisms and potential biological functions of ferroptosis, and explore the pathophysiological relevance and therapeutic implications of ferroptosis in NDDs. In addition, reviewing the roles of E3s and DUBs in regulating ferroptosis in NDDs aims to provide new insights and strategies for the treatment of NDDs. These include E3- and DUB-targeted drugs and ferroptosis inhibitors, which can be used to prevent and ameliorate the progression of NDDs.
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Affiliation(s)
- Linxia Lu
- College of Basic Medicine, Jiamusi University, Jiamusi 154007, People's Republic of China
| | - Cili Jifu
- College of Basic Medicine, Jiamusi University, Jiamusi 154007, People's Republic of China
| | - Jun Xia
- College of Basic Medicine, Jiamusi University, Jiamusi 154007, People's Republic of China
| | - Jingtao Wang
- College of Basic Medicine, Jiamusi University, Jiamusi 154007, People's Republic of China.
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Kang P, Wang AZX. Microbiota-gut-brain axis: the mediator of exercise and brain health. PSYCHORADIOLOGY 2024; 4:kkae007. [PMID: 38756477 PMCID: PMC11096970 DOI: 10.1093/psyrad/kkae007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 04/04/2024] [Accepted: 04/16/2024] [Indexed: 05/18/2024]
Abstract
The brain controls the nerve system, allowing complex emotional and cognitive activities. The microbiota-gut-brain axis is a bidirectional neural, hormonal, and immune signaling pathway that could link the gastrointestinal tract to the brain. Over the past few decades, gut microbiota has been demonstrated to be an essential component of the gastrointestinal tract that plays a crucial role in regulating most functions of various body organs. The effects of the microbiota on the brain occur through the production of neurotransmitters, hormones, and metabolites, regulation of host-produced metabolites, or through the synthesis of metabolites by the microbiota themselves. This affects the host's behavior, mood, attention state, and the brain's food reward system. Meanwhile, there is an intimate association between the gut microbiota and exercise. Exercise can change gut microbiota numerically and qualitatively, which may be partially responsible for the widespread benefits of regular physical activity on human health. Functional magnetic resonance imaging (fMRI) is a non-invasive method to show areas of brain activity enabling the delineation of specific brain regions involved in neurocognitive disorders. Through combining exercise tasks and fMRI techniques, researchers can observe the effects of exercise on higher brain functions. However, exercise's effects on brain health via gut microbiota have been little studied. This article reviews and highlights the connections between these three interactions, which will help us to further understand the positive effects of exercise on brain health and provide new strategies and approaches for the prevention and treatment of brain diseases.
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Affiliation(s)
- Piao Kang
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Clinical Center for Diabetes, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200233, China
- Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
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Yu Z, Shi H, Zhang J, Ma C, He C, Yang F, Zhao L. ROLE OF MICROGLIA IN SEPSIS-ASSOCIATED ENCEPHALOPATHY PATHOGENESIS: AN UPDATE. Shock 2024; 61:498-508. [PMID: 38150368 DOI: 10.1097/shk.0000000000002296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2023]
Abstract
ABSTRACT Sepsis-associated encephalopathy (SAE) is a serious complication of sepsis, which is characterized by cognitive dysfunction, a poor prognosis, and high incidences of morbidity and mortality. Substantial levels of systemic inflammatory factors induce neuroinflammatory responses during sepsis, ultimately disrupting the central nervous system's (CNS) homeostasis. This disruption results in brain dysfunction through various underlying mechanisms, contributing further to SAE's development. Microglia, the most important macrophage in the CNS, can induce neuroinflammatory responses, brain tissue injury, and neuronal dysregulation, resulting in brain dysfunction. They serve an important regulatory role in CNS homeostasis and can be activated through multiple pathways. Consequently, activated microglia are involved in several pathogenic mechanisms related to SAE and play a crucial role in its development. This article discusses the role of microglia in neuroinflammation, dysfunction of neurotransmitters, disruption of the blood-brain barrier, abnormal control of cerebral blood flow, mitochondrial dysfunction, and reduction in the number of good bacteria in the gut as main pathogenic mechanisms of SAE and focuses on studies targeting microglia to ameliorate SAE to provide a theoretical basis for targeted microglial therapy for SAE.
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Affiliation(s)
| | - Hui Shi
- Department of Critical Care Medicine, Chifeng Municipal Hospital, Chifeng Clinical Medical College of Inner Mongolia Medical University, Chifeng, China
| | - Jingjing Zhang
- Department of Central Laboratory, Chifeng Municipal Hospital, Chifeng Clinical Medical College of Inner Mongolia Medical University, Chifeng, China
| | - Chunhan Ma
- Chifeng Clinical Medical College of Inner Mongolia Medical University, Hohhot, China
| | - Chen He
- Chifeng Clinical Medical College of Inner Mongolia Medical University, Hohhot, China
| | - Fei Yang
- Department of Critical Care Medicine, Chifeng Municipal Hospital, Chifeng Clinical Medical College of Inner Mongolia Medical University, Chifeng, China
| | - Lina Zhao
- Department of Critical Care Medicine, General Hospital of Tianjin Medical University, Tianjin, China
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Gao X, Lin C, Feng Y, You Y, Jin Z, Li M, Zhou Y, Chen K. Akkermansia muciniphila-derived small extracellular vesicles attenuate intestinal ischemia-reperfusion-induced postoperative cognitive dysfunction by suppressing microglia activation via the TLR2/4 signaling. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2024; 1871:119630. [PMID: 37967793 DOI: 10.1016/j.bbamcr.2023.119630] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 11/07/2023] [Accepted: 11/07/2023] [Indexed: 11/17/2023]
Abstract
Akkermansia muciniphila (AKK) bacteria improve the functions of theere intestinal and blood-brain barriers (BBB) via their extracellular vesicles (AmEvs). However, their role in postoperative cognitive dysfunction (POCD) and its underlying mechanisms remain unclear. To investigate, we used C57BL/6 J mice divided into five groups: Sham, POCD, POCD+Akk, POCD+Evs, and POCD+Evs + PLX5622. POCD was induced through intestinal ischemia-reperfusion (I/R). The mice's cognitive function was assessed using behavioral tests, and possible mechanisms were explored by examining gut and BBB permeability, inflammation, and microglial function. Toll-like receptor (TLR) 2/4 pathway-related proteins were also investigated both in vitro and in vivo. PLX5622 chow was employed to eliminate microglial cells. Our findings revealed a negative correlation between AKK abundance and POCD symptoms. Supplementation with either AKK or AmEvs improved cognitive function, improved the performance of the intestinal barrier and BBB, and decreased inflammation and microglial activation in POCD mice compared to controls. Moreover, AmEvs treatment inhibited TLR2/4 signaling in the brains of POCD mice and LPS-treated microglial cells. In microglial-ablated POCD mice, however, AmEvs failed to protect BBB integrity. Overall, AmEvs is a potential therapeutic strategy for managing POCD by enhancing gut and BBB integrity and inhibiting microglial-mediated TLR2/4 signaling.
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Affiliation(s)
- Xiang Gao
- Department of Anesthesiology, Fujian Maternity and Child Health Hospital, Fuzhou, 350000, China; College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, 350000, China
| | - Chuantao Lin
- Department of Anesthesiology, Fujian Maternity and Child Health Hospital, Fuzhou, 350000, China; College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, 350000, China
| | - Yebin Feng
- Department of Science and Education, Fujian Maternity and Child Health Hospital, Fuzhou, 350000, China; College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, 350000, China
| | - Yi You
- Department of Anesthesiology, Fujian Maternity and Child Health Hospital, Fuzhou, 350000, China; College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, 350000, China
| | - Zhe Jin
- Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China
| | - Mengyun Li
- Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China
| | - Yufeng Zhou
- Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China
| | - Kai Chen
- Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China.
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Wang J, Xu F, Hu S, Xu Y, Wang X. Identification and validation of cortisol-related hub biomarkers and the related pathogenesis of biomarkers in Ischemic Stroke. Brain Behav 2024; 14:e3358. [PMID: 38376054 PMCID: PMC10823441 DOI: 10.1002/brb3.3358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 10/29/2023] [Accepted: 11/26/2023] [Indexed: 02/21/2024] Open
Abstract
BACKGROUND Ischemic stroke is a disease in which cerebral blood flow is blocked due to various reasons, leading to ischemia, hypoxia, softening, and even necrosis of brain tissues. The level of cortisol is related to the occurrence and progression of ischemic stroke. However, the mechanism governing their interrelationship is still unclear. The main objective of this study was to identify and understand the molecular mechanism between cortisol and IS. METHODS The common cortisol-related biological processes were screened by mutual verification of two data sets and the cortisol-related hub biomarkers were identified. Modular analysis of protein interaction networks was performed, and the differential pathway analysis of individual genes was conducted by GSVA and GSEA. Drug and transcription factor regulatory networks of hub genes were excavated, and the diagnostic potential of hub genes was analyzed followed by the construction of a diagnostic model. RESULTS By screening the two data sets by GSVA, three biological processes with common differences were obtained. After variation analysis, four cortisol-related hub biomarkers (CYP1B1, CDKN2B, MEN1, and USP8) were selected. Through the modular analysis of the protein-protein interaction network and double verification of GSVA and GSEA, a series of potential molecular mechanisms of hub genes were discovered followed by a series of drug regulatory networks and transcription factor regulatory networks. The hub biomarkers were found to have a high diagnostic value by ROC; thus, a diagnostic model with high diagnostic efficiency was constructed. The diagnostic value was mutually confirmed in the two data sets. CONCLUSION Four cortisol-related hub biomarkers are identified in this study, which provides new ideas for the key changes of cortisol during the occurrence of IS.
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Affiliation(s)
- Jing‐Jing Wang
- Neurology DepartmentThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina
- Neurology DepartmentPeople's Hospital of LuanchuanLuoyangChina
| | - Fang‐Biao Xu
- Department of EncephalopathyThe First Affiliated Hospital of Henan University of Chinese MedicineZhengzhouChina
- The First Clinical Medical CollegeHenan University of Chinese MedicineZhengzhouChina
| | - Sen Hu
- Department of Medical RecordsZhengzhou University People's HospitalHenan Provincial People's HospitalZhengzhouHenanPeople's Republic of China
| | - Yu‐Ming Xu
- Neurology DepartmentThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina
| | - Xin‐Zhi Wang
- Department of EncephalopathyThe First Affiliated Hospital of Henan University of Chinese MedicineZhengzhouChina
- The First Clinical Medical CollegeHenan University of Chinese MedicineZhengzhouChina
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Oh J, Kwon TW, Choi JH, Kim Y, Moon SK, Nah SY, Cho IH. Ginsenoside-Re inhibits experimental autoimmune encephalomyelitis as a mouse model of multiple sclerosis by downregulating TLR4/MyD88/NF-κB signaling pathways. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 122:155065. [PMID: 37856989 DOI: 10.1016/j.phymed.2023.155065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 08/17/2023] [Accepted: 09/01/2023] [Indexed: 10/21/2023]
Abstract
BACKGROUND Ginsenosides are main active compounds of Panax ginseng with pharmacological effects on immunological/neurological diseases. Recently, ginsenoside-Re (G-Re) has been shown to exert neuroprotective effects on neurodegenerative diseases such as Alzheimer's disease. However, whether G-Re has an effect on multiple sclerosis (MS), a representative autoimmune disease of the central nervous system (CNS), has not been revealed yet. PURPOSE AND METHODS The purpose of this study was to investigate pharmacological effects of G-Re and related molecular mechanisms using a myelin oligodendrocyte glycoprotein peptide-immunized experimental autoimmune encephalomyelitis (EAE) animal model of MS and lipopolysaccharide (LPS)-stimulated bEND.3 cells as an in vitro model of the blood-brain barrier (BBB). RESULTS G-Re attenuated motor impairment of EAE, demyelination, and inflammation in spinal cords of EAE mice. G-Re reduced infiltration/activation of microglia/macrophages and decreased mRNA expression levels of pro-inflammatory cytokines (IL-1β and IL-6), chemokines (MIP-1α, MCP-1, and RANTES), and enzymes (iNOS) in spinal cords of EAE mice. G-Re inhibited alterations of BBB constituents (such as astrocytes, cell adhesion molecule (platelet endothelial cell adhesion molecule-1), and tight junctional molecules (occludin and zonula occludens-1)) and toll like receptor 4 (TLR4)/MyD88/nuclear factor kappa-B (NF-κB) signaling pathways in spinal cords of EAE mice and LPS-stimulated bEND.3 cells. Interestingly, combination treatment with G-Re and TLR4 inhibitor (TAK242) significantly inhibited the upregulation of TLR4/MyD88/NF-κB pathway in LPS-stimulated bEND.3 cells. TLR4 inhibitor- and activator-treated EAE mice showed conflicting behavior patterns. CONCLUSION G-Re might alleviate motor impairment of EAE and its pathological/inflammatory events in the spinal cord by preventing BBB disruption via downregulation of TLR4/MyD88/NF-κB signaling pathways. These findings for the first time suggest that G-Re might be a potential therapeutic for MS through maintenance of BBB integrity.
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Affiliation(s)
- Jinhee Oh
- Department of Convergence Medical Science, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea; Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea.
| | - Tae Woo Kwon
- Department of Convergence Medical Science, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea; Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea.
| | - Jong Hee Choi
- Department of Convergence Medical Science, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea.
| | - Yunna Kim
- Department of Neuropsychiatry in Korean Medicine, Kyung Hee University Medical Center, Kyung Hee University, Seoul 02447, Republic of Korea.
| | - Sang-Kwan Moon
- Department of Cardiology and Neurology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea.
| | - Seung-Yeol Nah
- Ginsentology Research Laboratory and Department of Physiology, College of Veterinary Medicine and Bio/Molecular Informatics Center, Konkuk University, Seoul 05029, Republic of Korea.
| | - Ik-Hyun Cho
- Department of Convergence Medical Science, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea; Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea; Institute of Convergence Korean Medicine, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea.
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Li Y, Chen X, Zhou M, Feng S, Peng X, Wang Y. Microglial TLR4/NLRP3 Inflammasome Signaling in Alzheimer's Disease. J Alzheimers Dis 2024; 97:75-88. [PMID: 38043010 DOI: 10.3233/jad-230273] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2023]
Abstract
Alzheimer's disease is a pervasive neurodegenerative disease that is estimated to represent approximately 70% of dementia cases worldwide, and the molecular complexity that has been highlighted remains poorly understood. The accumulation of extracellular amyloid-β (Aβ), intracellular neurofibrillary tangles formed by tau hyperphosphorylation, and neuroinflammation are the major pathological features of Alzheimer's disease (AD). Over the years, there has been no apparent breakthrough in drug discovery based on the Aβ and tau hypotheses. Neuroinflammation has gradually become a hot spot in AD treatment research. As the primary cells of innate immunity in the central nervous system, microglia play a key role in neuroinflammation. Toll-like receptor 4 (TLR4) and nucleotide-binding oligomerization domain-like receptor 3 (NLRP3) inflammasomes are vital molecules in neuroinflammation. In the pathological context of AD, the complex interplay between TLR4 and the NLRP3 inflammasomes in microglia influences AD pathology via neuroinflammation. In this review, the effect of the activation and inhibition of TLR4 and NLRP3 in microglia on AD pathology, as well as the cross-talk between TLR4 and the NLRP3 inflammasome, and the influence of essential molecules in the relevant signaling pathway on AD pathology, were expounded. In addition, the feasibility of these factors in representing a potential treatment option for AD has been clarified.
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Affiliation(s)
- Yunfeng Li
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
- Department of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Xiongjin Chen
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
- Department of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Mulan Zhou
- Department of Pharmacy, The People's Hospital of Gaozhou, Maoming, China
| | - Sifan Feng
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
- Department of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Xiaoping Peng
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
- Department of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Yan Wang
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
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Bi W, Bao K, Zhou X, Deng Y, Li X, Zhang J, Lan X, Zhao J, Lu D, Xu Y, Cen Y, Cao R, Xu M, Zhong W, Zhu L. PSMC5 regulates microglial polarization and activation in LPS-induced cognitive deficits and motor impairments by interacting with TLR4. J Neuroinflammation 2023; 20:277. [PMID: 38001534 PMCID: PMC10668523 DOI: 10.1186/s12974-023-02904-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 09/23/2023] [Indexed: 11/26/2023] Open
Abstract
Luteolin is a flavonoid found in high concentrations in celery and green pepper, and acts as a neuroprotectant. PSMC5 (proteasome 26S subunit, ATPase 5) protein levels were reduced after luteolin stimulation in activated microglia. We aimed to determine whether regulating PSMC5 expression could inhibit neuroinflammation, and investigate the underlying mechanisms.BV2 microglia were transfected with siRNA PSMC5 before the addition of LPS (lipopolysaccharide, 1.0 µg/ml) for 24 h in serum free DMEM. A mouse model of LPS-induced cognitive and motor impairment was established to evaluate the neuroprotective effects of shRNA PSMC5. Intracerebroventricular administration of shRNA PSMC5 was commenced 7 days prior to i.p. injection of LPS (750 μg/kg). Treatments and behavioral experiments were performed once daily for 7 consecutive days. Behavioral tests and pathological/biochemical assays were performed to evaluate LPS-induced hippocampal damage. Molecular dynamics simulation was used to confirm the interaction between PSMC5 and TLR4 (Toll-like receptor 4) in LPS-stimulated BV2 microglia. SiRNA PSMC5 inhibited BV2 microglial activation, and suppressed the release of inflammatory factors (IL-1β, COX-2, PGE2, TNF-α, and iNOS) upon after LPS stimulation in BV2 microglia. LPS increased IκB-α and p65 phosphorylation, which was attenuated by siRNA PSMC5. Behavioral tests and pathological/biochemical assays showed that shRNA PSMC5 attenuated LPS-induced cognitive and motor impairments, and restored synaptic ultrastructure and protein levels in mice. ShRNA PSMC5 reduced pro-inflammatory cytokine (TNF-α, IL-1β, PGE2, and NO) levels in the serum and brain, and relevant protein factors (iNOS and COX-2) in the brain. Furthermore, shRNA PSMC5 upregulated the anti-inflammatory mediators interleukin IL-4 and IL-10 in the serum and brain, and promoted a pro-inflammation-to-anti-inflammation phenotype shift in microglial polarization. Mechanistically, shRNA PSMC5 significantly alleviated LPS-induced TLR4 expression. The polarization of LPS-induced microglial pro-inflammation phenotype was abolished by TLR4 inhibitor and in the TLR-4-/- mouse, as in shRNA PSMC5 treatment. PSMC5 interacted with TLR4 via the amino sites Glu284, Met139, Leu127, and Phe283. PSMC5 site mutations attenuated neuroinflammation and reduced pro-inflammatory factors by reducing TLR4-related effects, thereby reducing TLR4-mediated MyD88 (myeloid differentiation factor 88)-dependent activation of NF-κB. PSMC5 could be an important therapeutic target for treatment of neurodegenerative diseases involving neuroinflammation-associated cognitive deficits and motor impairments induced by microglial activation.
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Affiliation(s)
- Wei Bi
- Department of Neurology, The First Affiliated Hospital of Jinan University, No. 613, West Huangpu Avenue, Guangzhou, 510630, China
- Clinical Neuoscience Institute, The First Affiliated Hospital of Jinan University, No. 613, West Huangpu Avenue, Guangzhou, 510630, China
| | - Keyao Bao
- Department of Pathophysiology, School of Medicine, Jinan University, No. 601, West Huangpu Avenue, Guangzhou, 510632, China
| | - Xinqi Zhou
- Department of Pathophysiology, School of Medicine, Jinan University, No. 601, West Huangpu Avenue, Guangzhou, 510632, China
| | - Yihui Deng
- Central Laboratory of the First Affiliated Hospital of Jinan University, No. 613, West Huangpu Avenue, Guangzhou, 510630, China
| | - Xiaoting Li
- Department of Neurology, The First Affiliated Hospital of Jinan University, No. 613, West Huangpu Avenue, Guangzhou, 510630, China
| | - Jiawei Zhang
- Department of Pathophysiology, School of Medicine, Jinan University, No. 601, West Huangpu Avenue, Guangzhou, 510632, China
| | - Xin Lan
- Department of Pathophysiology, School of Medicine, Jinan University, No. 601, West Huangpu Avenue, Guangzhou, 510632, China
| | - Jiayi Zhao
- Department of Pathophysiology, School of Medicine, Jinan University, No. 601, West Huangpu Avenue, Guangzhou, 510632, China
| | - Daxiang Lu
- Department of Pathophysiology, School of Medicine, Jinan University, No. 601, West Huangpu Avenue, Guangzhou, 510632, China
| | - Yezi Xu
- Department of Neurology, The First Affiliated Hospital of Jinan University, No. 613, West Huangpu Avenue, Guangzhou, 510630, China
| | - Yanmei Cen
- Department of Neurology, The First Affiliated Hospital of Jinan University, No. 613, West Huangpu Avenue, Guangzhou, 510630, China
| | - Rui Cao
- Department of Neurology, The First Affiliated Hospital of Jinan University, No. 613, West Huangpu Avenue, Guangzhou, 510630, China
| | - Mengyang Xu
- Department of Biology, Jinan University, No. 601, West Huangpu Avenue, Guangzhou, 510632, China
| | - Wenbin Zhong
- Department of Biology, Jinan University, No. 601, West Huangpu Avenue, Guangzhou, 510632, China.
| | - Lihong Zhu
- Department of Pathophysiology, School of Medicine, Jinan University, No. 601, West Huangpu Avenue, Guangzhou, 510632, China.
- Guangzhou Key Laboratory for Germ-free Animals and Microbiota Application, No. 601, West Huangpu Avenue, Guangzhou, 510632, China.
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Wu B, Gan A, Wang R, Lin F, Yan T, Jia Y. Alpinia oxyphylla Miq. volatile oil ameliorates depressive behaviors and inhibits neuroinflammation in CUMS-exposed mice by inhibiting the TLR4-medicated MyD88/NF-κB signaling pathway. J Chem Neuroanat 2023; 130:102270. [PMID: 37001682 DOI: 10.1016/j.jchemneu.2023.102270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/27/2023] [Accepted: 03/28/2023] [Indexed: 04/01/2023]
Abstract
This study aimed to explore the antidepressant effect and underlying mechanism of the Alpinia oxyphylla Miq. volatile oil (AOVO) in mice exposed to chronic unpredictable mild stress (CUMS). C57BL/6 mice were grouped and administered with different dosages of AOVO (0.25, 0.50, 1.00, or 2.00 mL/kg body weight, i.g.), TAK242 (a TLR4 inhibitor, 0.75 mg/kg body weight, i.p.), or TAK242 (0.75 mg/kg body weight, i.p.) + AOVO (0.50 mL/kg body weight, i.g.) for 21 days. Depression-like symptoms in the mice were then evaluated through their body weight gain (BW), the open field test (OFT), the sucrose preference test (SPT), the novelty-suppressed feeding test (NSFT), and forced swimming test (FST). The concentrations of interleukin-1β (IL-1β), interleukin-6 (IL-6), tumor necrosis factor α (TNF-α), and 5-hydroxytyrptamine (5-HT) in the mice were determined using ELISA kits. Hematoxylin and eosin (HE) dying were performed for histopathological examination. The expression of inflammatory proteins was assessed through western blotting (WB) and immunofluorescence staining. AOVO was found to improve the behavioral indexes of CUMS-exposed mice behavioral and synergize TAK242 to mitigate both their depressive symptoms and neuroinflammation. Moreover, AOVO was found to inhibit the hippocampal damage, decrease inflammatory cytokines (Reduced IL-1β, IL-6, and TNF-α by 19.97 %, 22.87 %, and 24.13 %, respectively), and downregulate the expression of TLR4/MyD88/NF-κB signaling pathway-related proteins in the hippocampus of CUMS-exposed mice (Reduced TLR4, MyD88, and NF-κB by 46.14 %, 42.48 %, and 38.08 %, respectively). These findings demonstrate that AOVO can ameliorate depressive behaviors and mitigate neuroinflammation in the CUMS-exposed mice via suppressing the TLR4-medicated MyD88/NF-κB signaling pathway.
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Ge X, Zhou Z, Yang S, Ye W, Wang Z, Wang J, Xiao C, Cui M, Zhou J, Zhu Y, Wang R, Gao Y, Wang H, Tang P, Zhou X, Wang C, Cai W. Exosomal USP13 derived from microvascular endothelial cells regulates immune microenvironment and improves functional recovery after spinal cord injury by stabilizing IκBα. Cell Biosci 2023; 13:55. [PMID: 36915206 PMCID: PMC10012460 DOI: 10.1186/s13578-023-01011-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Accepted: 03/09/2023] [Indexed: 03/14/2023] Open
Abstract
Spinal cord injury (SCI) can result in irreversible sensory and motor disability with no effective treatment currently. After SCI, infiltrated macrophages accumulate in epicenter through destructed blood-spinal cord barrier (BSCB). Further, great majority of macrophages are preferentially polarized to M1 phenotype, with only a few transient M2 phenotype. The purpose of this study was to explore roles of vascular endothelial cells in microglia/macrophages polarization and the underlying mechanism. Lipopolysaccharide (LPS) was used to pretreat BV2 microglia and RAW264.7 macrophages followed by administration of conditioned medium from microvascular endothelial cell line bEnd.3 cells (ECM). Analyses were then performed to determine the effects of exosomes on microglia/macrophages polarization and mitochondrial function. The findings demonstrated that administration of ECM shifted microglia/macrophages towards M2 polarization, ameliorated mitochondrial impairment, and reduced reactive oxygen species (ROS) production in vitro. Notably, administration of GW4869, an exosomal secretion inhibitor, significantly reversed these observed benefits. Further results revealed that exosomes derived from bEnd.3 cells (Exos) promote motor rehabilitation and M2 polarization of microglia/macrophages in vivo. Ubiquitin-specific protease 13 (USP13) was shown to be significantly enriched in BV2 microglia treated with Exos. USP13 binds to, deubiquitinates and stabilizes the NF-κB inhibitor alpha (IκBα), thus regulating microglia/macrophages polarization. Administration of the selective IκBα inhibitor betulinic acid (BA) inhibited the beneficial effect of Exos in vivo. These findings uncovered the potential mechanism underlying the communications between vascular endothelial cells and microglia/macrophages after SCI. In addition, this study indicates exosomes might be a promising therapeutic strategy for SCI treatment.
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Affiliation(s)
- Xuhui Ge
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Zheng Zhou
- Department of Emergency Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Siting Yang
- Department of Anesthesiology and Nursing, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Wu Ye
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Zhuanghui Wang
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Jiaxing Wang
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Chenyu Xiao
- Department of Human Anatomy, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Min Cui
- Department of Human Anatomy, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Jiawen Zhou
- Department of Pharmacology, China Pharmaceutical University, Nanjing, 211198, China
| | - Yufeng Zhu
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Rixiao Wang
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Yu Gao
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Haofan Wang
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Pengyu Tang
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Xuhui Zhou
- Department of Orthopedics, Second Affiliated Hospital of Naval Medical University, Shanghai, 200003, China
| | - Ce Wang
- Department of Orthopedics, Second Affiliated Hospital of Naval Medical University, Shanghai, 200003, China.
| | - Weihua Cai
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China.
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12
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Fan X, Zhang Y, Song Y, Zhao Y, Xu Y, Guo F, Shao M, Ma X, Zhang W, Wei F, Qin G. Compound Danshen Dripping Pills moderate intestinal flora and the TLR4/MyD88/NF-κB signaling pathway in alleviating cognitive dysfunction in type 2 diabetic KK-Ay mice. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 111:154656. [PMID: 36682300 DOI: 10.1016/j.phymed.2023.154656] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 06/21/2022] [Accepted: 01/08/2023] [Indexed: 06/17/2023]
Abstract
BACKGROUD Bidirectional communications between the gut microbiota and the brain may play a critical role in diabetes-related cognitive impairment. Compound Danshen Dripping Pills (CDDP) treatment has shown remarkable improvement in cognitive impairment in people with type 2 diabetes mellitus (T2DM) in clinical settings, but the underlying mechanisms remain unknown. PURPOSE An extensive detailed strategy via in vivo functional experiments, transcriptomics, metabolomics, and network pharmacology was adopted to investigate the CDDP-treatment mechanism in diabetic cognitive dysfunction. METHODS For 12 weeks, KK-Ay mice, a spontaneous T2DM model, were intragastrically administered various doses of CDDP solution or an equivalent volume of water, and the nootropic drug piracetam was orally administered as a positive control. At the 12th week, cognition was assessed using Morris water maze tests and brain magnetic resonance imaging (MRI). Furthermore, transcriptomics, metabolomics, and network pharmacology analyses were applied to reveal novel molecular mechanisms of CDDP-treatment in diabetic cognitive dysfunction of KK-Ay mice, which were then validated using quantitative real-time polymerase chain reaction and Western blot. RESULTS Here we verified that CDDP can suppress inflammatory response and alleviate the cognitive dysfunction in KK-Ay mice. Also, as demonstrated by 16S rRNA sequencing and short-chain fatty acids (SCFAs) analysis, CDDP attenuated intestinal flora disorder as well as increases of metabolites including butyric acid, hexanoic acid, and isohexic acid. Given the integrated analyses of network pharmacology, transcriptomic, metabolomic data, and molecular biology, the TLR4/MyD88/NF-κB signaling pathway was activated in diabetes, which could be reversed by CDDP. CONCLUSIONS Our findings demonstrate that CDDP restructures the gut microbiota composition and increased the intestinal SCFAs in KK-Ay mice, which might inhibit neuroinflammation, and thus improve diabetic mice cognitive disorder.
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Affiliation(s)
- Xunjie Fan
- Department of Endocrinology and Metabolism, First Affiliated Hospital of Zhengzhou University, NO.1 Jianshe East Rd., Zhengzhou, Henan 450052, China; Academy of Medical Sciences, Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Yuanyuan Zhang
- Department of Endocrinology and Metabolism, First Affiliated Hospital of Zhengzhou University, NO.1 Jianshe East Rd., Zhengzhou, Henan 450052, China
| | - Yi Song
- Department of Endocrinology and Metabolism, First Affiliated Hospital of Zhengzhou University, NO.1 Jianshe East Rd., Zhengzhou, Henan 450052, China; Academy of Medical Sciences, Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Yanyan Zhao
- Department of Endocrinology and Metabolism, First Affiliated Hospital of Zhengzhou University, NO.1 Jianshe East Rd., Zhengzhou, Henan 450052, China
| | - Yanan Xu
- Department of Endocrinology and Metabolism, First Affiliated Hospital of Zhengzhou University, NO.1 Jianshe East Rd., Zhengzhou, Henan 450052, China; Academy of Medical Sciences, Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Feng Guo
- Department of Endocrinology and Metabolism, First Affiliated Hospital of Zhengzhou University, NO.1 Jianshe East Rd., Zhengzhou, Henan 450052, China; Academy of Medical Sciences, Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Mingwei Shao
- Department of Endocrinology and Metabolism, First Affiliated Hospital of Zhengzhou University, NO.1 Jianshe East Rd., Zhengzhou, Henan 450052, China; Academy of Medical Sciences, Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Xiaojun Ma
- Department of Endocrinology and Metabolism, First Affiliated Hospital of Zhengzhou University, NO.1 Jianshe East Rd., Zhengzhou, Henan 450052, China
| | - Wei Zhang
- Department of Endocrinology and Metabolism, First Affiliated Hospital of Zhengzhou University, NO.1 Jianshe East Rd., Zhengzhou, Henan 450052, China
| | - Fangyi Wei
- Department of Endocrinology and Metabolism, First Affiliated Hospital of Zhengzhou University, NO.1 Jianshe East Rd., Zhengzhou, Henan 450052, China; Academy of Medical Sciences, Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Guijun Qin
- Department of Endocrinology and Metabolism, First Affiliated Hospital of Zhengzhou University, NO.1 Jianshe East Rd., Zhengzhou, Henan 450052, China.
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Liu T, Zhang C, Ying J, Wang Y, Yan G, Zhou Y, Lu G. Inhibition of the intracellular domain of Notch1 results in vascular endothelial cell dysfunction in sepsis. Front Immunol 2023; 14:1134556. [PMID: 37205094 PMCID: PMC10185824 DOI: 10.3389/fimmu.2023.1134556] [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: 12/30/2022] [Accepted: 04/21/2023] [Indexed: 05/21/2023] Open
Abstract
Background Notch signaling is critical for regulating the function of vascular endothelial cells (ECs). However, the effect of the intracellular domain of Notch1 (NICD) on EC injury in sepsis remains unclear. Methods We established a cell model of vascular endothelial dysfunction and induced sepsis in a mouse model via lipopolysaccharide (LPS) injection and cecal ligation and puncture (CLP). Endothelial barrier function and expression of endothelial-related proteins were determined using CCK-8, permeability, flow cytometry, immunoblot, and immunoprecipitation assays. The effect of NICD inhibition or activation on endothelial barrier function was evaluated in vitro. Melatonin was used for NICD activation in sepsis mice. The survival rate, Evans blue dye of organs, vessel relaxation assay, immunohistochemistry, ELISA, immunoblot were used to explore the specific role of melatonin for sepsis induced vascular dysfunction in vivo. Results We found that LPS, interleukin 6, and serum collected from septic children could inhibit the expression of NICD and its downstream regulator Hes1, which impaired endothelial barrier function and led to EC apoptosis through the AKT pathway. Mechanistically, LPS decreased the stability of NICD by inhibiting the expression of a deubiquitylating enzyme, ubiquitin-specific proteases 8 (USP8). Melatonin, however, upregulated USP8 expression, thus maintaining the stability of NICD and Notch signaling, which ultimately reduced EC injury in our sepsis model and elevated the survival rate of septic mice. Conclusions We found a previously uncharacterized role of Notch1 in mediating vascular permeability during sepsis, and we showed that inhibition of NICD resulted in vascular EC dysfunction in sepsis, which was reversed by melatonin. Thus, the Notch1 signaling pathway is a potential target for the treatment of sepsis.
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Affiliation(s)
- Tingyan Liu
- Department of Critical Care Medicine, Children’s Hospital of Fudan University, Shanghai, China
| | - Caiyan Zhang
- Department of Critical Care Medicine, Children’s Hospital of Fudan University, Shanghai, China
| | - Jiayun Ying
- Department of Critical Care Medicine, Children’s Hospital of Fudan University, Shanghai, China
| | - Yaodong Wang
- Department of Critical Care Medicine, Children’s Hospital of Fudan University, Shanghai, China
| | - Gangfeng Yan
- Department of Critical Care Medicine, Children’s Hospital of Fudan University, Shanghai, China
| | - Yufeng Zhou
- Institute of Pediatrics, Children’s Hospital of Fudan University, National Children’s Medical Center, and the Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
- National Health Commission (NHC) Key Laboratory of Neonatal Diseases, Fudan University, Shanghai, China
- *Correspondence: Yufeng Zhou, ; Guoping Lu,
| | - Guoping Lu
- Department of Critical Care Medicine, Children’s Hospital of Fudan University, Shanghai, China
- *Correspondence: Yufeng Zhou, ; Guoping Lu,
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14
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m(6)A methyltransferase METTL3 relieves cognitive impairment of hyperuricemia mice via inactivating MyD88/NF-κB pathway mediated NLRP3-ASC-Caspase1 inflammasome. Int Immunopharmacol 2022; 113:109375. [PMID: 36461592 DOI: 10.1016/j.intimp.2022.109375] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 10/15/2022] [Accepted: 10/16/2022] [Indexed: 11/07/2022]
Abstract
BACKGROUND Recent studies have uncovered that hyperuricemia (HUA) leads to cognitive deficits, which are accompanied by neuronal damage and neuroinflammation. Here, we aim to explore the role of methyltransferase-like 3 (METTL3) in HUA-mediated neuronal apoptosis and microglial inflammation. METHODS A HUA mouse model was constructed. The spatial memory ability of the mice was assessed by the Morris water maze experiment (MWM), and neuronal apoptosis was analyzed by the TdT-mediated dUTP nick end labeling (TUNEL) assay. Besides, enzyme-linked immunosorbent assay (ELISA) was utilized to measure the contents of inflammatory factors (IL-1β, IL-6, and TNF-α) and oxidative stress markers (MDA, SOD, and CAT) in the serum of mice. In vitro, the mouse hippocampal neuron (HT22) and microglia (BV2) were treated with uric acid (UA). Flow cytometry was applied to analyze HT22 and BV2 cell apoptosis, and ELISA was conducted to observe neuroinflammation and oxidative stress. In addition, the expression of MyD88, p-NF-κB, NF-κB, NLRP3, ASC and Caspase1 was determined by Western blot. RESULTS METTL3 and miR-124-3p were down-regulated, while the MyD88-NF-κB pathway was activated in the HUA mouse model. UA treatment induced neuronal apoptosis in HT22 and stimulated microglial activation in BV2. Overexpressing METTL3 alleviated HT22 neuronal apoptosis and resisted the release of inflammatory cytokines and oxidative stress mediators in BV2 cells. METTL3 repressed MyD88-NF-κB and NLRP3-ASC-Caspase1 inflammasome. In addition, METTL3 overexpression enhanced miR-124-3p expression, while METTL3 knockdown aggravated HT22 cell apoptosis and BV2 cell overactivation. CONCLUSION METTL3 improves neuronal apoptosis and microglial activation in the HUA model by choking the MyD88/NF-κB pathway and up-regulating miR-124-3p.
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15
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Liu N, Lin MM, Wang Y. The Emerging Roles of E3 Ligases and DUBs in Neurodegenerative Diseases. Mol Neurobiol 2022; 60:247-263. [PMID: 36260224 DOI: 10.1007/s12035-022-03063-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 09/27/2022] [Indexed: 10/24/2022]
Abstract
Despite annual increases in the incidence and prevalence of neurodegenerative diseases, there is a lack of effective treatment strategies. An increasing number of E3 ubiquitin ligases (E3s) and deubiquitinating enzymes (DUBs) have been observed to participate in the pathogenesis mechanisms of neurodegenerative diseases, on the basis of which we conducted a systematic literature review of the studies. This review will help to explore promising therapeutic targets from highly dynamic ubiquitination modification processes.
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Affiliation(s)
- Na Liu
- Department of Pharmacology College of Pharmaceutical Sciences, Suzhou Key Laboratory of Aging and Nervous Diseases, and Jiangsu Key Laboratory of Neuropsychiatric Diseases, Soochow University, Suzhou, Jiangsu, China
| | - Miao-Miao Lin
- Department of Pharmacology College of Pharmaceutical Sciences, Suzhou Key Laboratory of Aging and Nervous Diseases, and Jiangsu Key Laboratory of Neuropsychiatric Diseases, Soochow University, Suzhou, Jiangsu, China
| | - Yan Wang
- Department of Pharmacology College of Pharmaceutical Sciences, Suzhou Key Laboratory of Aging and Nervous Diseases, and Jiangsu Key Laboratory of Neuropsychiatric Diseases, Soochow University, Suzhou, Jiangsu, China.
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16
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Cao LH, Zhao YY, Bai M, Geliebter D, Geliebter J, Tiwari R, He HJ, Wang ZZ, Jia XY, Li J, Li XM, Miao MS. Mechanistic Studies of Gypenosides in Microglial State Transition and its Implications in Depression-Like Behaviors: Role of TLR4/MyD88/NF-κB Signaling. Front Pharmacol 2022; 13:838261. [PMID: 35370734 PMCID: PMC8973912 DOI: 10.3389/fphar.2022.838261] [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: 01/04/2022] [Accepted: 02/22/2022] [Indexed: 12/14/2022] Open
Abstract
Depression is a prevalent psychiatric disorder. Microglial state transition has been found in many neurological disorders including depression. Gypenosides (Gypenosides I-LXXVIII, Gps) are saponin extracts isolated from the traditional Chinese herb Gynostemma pentaphyllum (Thunb.) Makino that exert anti-inflammatory and neuroprotective activities and regulate depression-like behaviors. However, its effect on microglial state transition in depression remains unknown. We aimed to evaluate the potential relationship between Gps and TLR4/MyD88/NF-κB signaling in microglial state transition in vitro and in vivo. First, BV-2 cells (microglial cell line) were exposed to lipopolysaccharides (LPS) and treated with 10 or 5 μg/ml Gps. Second, the chronic unpredictable mild stress (CUMS)-induced depression mouse model was used to investigate the antidepressant-like behaviors effects of Gps (100 or 50 mg/kg). We determined depression-like behaviors using the open-field test (OFT), forced swim test (FST), and sucrose preference test (SPT). Proteins and inflammatory factors in the TLR4/MyD88/NF-κB signaling pathway and the different microglial reaction states markers were subsequently conducted using enzyme-linked immunosorbent assay, immunocytochemistry, immunofluorescence, qPCR, or Western blotting analyses to evaluate the anti-inflammatory and antidepressant properties of Gps and the underlying molecular mechanisms. We found that Gps regulated the microglial cell line state transition in LPS-exposed BV-2 cells, as evidenced by the significantly decreased expression of inflammatory parameters iNOS, IL-1β, IL-6, and TNF-α and significantly promoted anti-inflammatory microglial phenotypes markers CD206 (Mrc1) and IL-10. More importantly, Gps protected against the loss of monoamine neurotransmitters and depression-like behavior in a mouse model of depression, which was accompanied by a regulation of the microglial state transition. Mechanistically, Gps inhibited TLR4/MyD88/NF-κB signaling, which reduced the release of downstream inflammatory cytokines (IL-1β, IL-6, and TNF-α) and promoted microglial phenotype transition, which all together contributed to the antidepressant effect. Our results suggest that Gps prevents depression-like behaviors by regulating the microglial state transition and inhibiting the TLR4/MyD88/NF-κB signaling pathway. Thus, Gps could be a promising therapeutic strategy to prevent and treat depression-like behaviors and other psychiatric disorders.
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Affiliation(s)
- Li-Hua Cao
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou, China
| | - Yuan-Yuan Zhao
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, China
| | - Ming Bai
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou, China
| | | | - Jan Geliebter
- Department of Pathology, Microbiology and Immuology, New York Medical College, Valhalla, NY, United States.,Department of Otolaryngology, New York Medical College, Valhalla, NY, United States
| | - Raj Tiwari
- Department of Pathology, Microbiology and Immuology, New York Medical College, Valhalla, NY, United States.,Department of Otolaryngology, New York Medical College, Valhalla, NY, United States
| | - Hong-Juan He
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou, China
| | - Zhen-Zhen Wang
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou, China
| | - Xing-Yuan Jia
- Department of Pharmacy, Henan Province Hospital of Traditional Chinese Medicine, Zhengzhou, China
| | - Jin Li
- Department of Neurology, New York Medical College, Westchester Medical Center, Valhalla, NY, United States
| | - Xiu-Min Li
- Department of Pathology, Microbiology and Immuology, New York Medical College, Valhalla, NY, United States.,Department of Otolaryngology, New York Medical College, Valhalla, NY, United States
| | - Ming-San Miao
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou, China
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17
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Li J, Yu Z, Han B, Li S, Lv Y, Wang X, Yang Q, Wu P, Liao Y, Qu B, Zhang Z. Activation of the GPX4/TLR4 Signaling Pathway Participates in the Alleviation of Selenium Yeast on Deltamethrin-Provoked Cerebrum Injury in Quails. Mol Neurobiol 2022; 59:2946-2961. [PMID: 35247140 DOI: 10.1007/s12035-022-02744-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 01/10/2022] [Indexed: 12/11/2022]
Abstract
Deltamethrin (DLM) is a member of pyrethroid pesticide widely applied for agriculture and aquaculture, and its residue in the environment seriously threatens the bio-safety. The cerebrum might be vulnerable to pesticide-triggered oxidative stress. However, there is no specific antidote for treating DLM-triggered cerebral injury. Selenium (Se) is an essential trace element functionally forming selenoprotein glutathione peroxidase (GPX) in antioxidant defense. Se yeast (SY) is a common and effective organic form of Se supplement with high selenomethionine content. Accordingly, this study focused on investigating the therapeutic potential of SY on DLM-induced cerebral injury in quails after chronically exposing to DLM and exploring the underlying mechanisms. Quails were treated with/without SY (0.4 mg kg-1 SY added in standard diet) in the presence/absence of DLM (45 mg kg-1 body weight intragastrically) for 12 weeks. The results showed SY supplementation ameliorated DLM-induced cerebral toxicity. Concretely, SY elevated the content of Se and increased GPX4 level in DLM-treated quail cerebrum. Furthermore, SY enhanced antioxidant defense system by upregulating nuclear factor-erythroid-2-related factor 2 (Nrf2) associated members. Inversely, SY diminished the changes of apoptosis- and inflammation-associated proteins and genes including toll-like receptor 4 (TLR4). Collectively, our results suggest that dietary SY protects against DLM-induced cerebral toxicity in quails via positively regulating the GPX4/TLR4 signaling pathway. GPX4 may be a potential therapeutic target for insecticide-induced biotoxicity.
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Affiliation(s)
- Jiayi Li
- College of Veterinary Medicine, Northeast Agricultural University, 600 Changjiang Road, Harbin, 150030, China
| | - Zhongxian Yu
- Pharmacy Department, The Affiliated Hospital To Changchun University of Chinese Medicine, 1478 Gongnong Road, Hongqi Street, Chaoyang District, Changchun, Jilin Province, 130021, China
| | - Bing Han
- College of Veterinary Medicine, Northeast Agricultural University, 600 Changjiang Road, Harbin, 150030, China
| | - Siyu Li
- College of Veterinary Medicine, Northeast Agricultural University, 600 Changjiang Road, Harbin, 150030, China
| | - Yueying Lv
- College of Veterinary Medicine, Northeast Agricultural University, 600 Changjiang Road, Harbin, 150030, China
| | - Xiaoqiao Wang
- College of Veterinary Medicine, Northeast Agricultural University, 600 Changjiang Road, Harbin, 150030, China
| | - Qingyue Yang
- College of Veterinary Medicine, Northeast Agricultural University, 600 Changjiang Road, Harbin, 150030, China
| | - Pengfei Wu
- College of Veterinary Medicine, Northeast Agricultural University, 600 Changjiang Road, Harbin, 150030, China
| | - Yuge Liao
- College of Veterinary Medicine, Northeast Agricultural University, 600 Changjiang Road, Harbin, 150030, China
| | - Bing Qu
- College of Veterinary Medicine, Northeast Agricultural University, 600 Changjiang Road, Harbin, 150030, China
| | - Zhigang Zhang
- College of Veterinary Medicine, Northeast Agricultural University, 600 Changjiang Road, Harbin, 150030, China. .,Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Harbin, 150030, China.
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Ou G, Jiang X, Deng Y, Dong J, Xu W, Zhang X, Zhang J. Inhibition or Deletion of Hydroxylases-Prolyl-4-Hydroxyases 3 Alleviates Lipopolysaccharide-induced Neuroinflammation and Neurobehavioral Deficiency. Neuroscience 2022; 481:47-59. [PMID: 34801658 DOI: 10.1016/j.neuroscience.2021.11.025] [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: 06/29/2021] [Revised: 10/07/2021] [Accepted: 11/11/2021] [Indexed: 11/18/2022]
Abstract
It is well known that neuroinflammation plays a key role in neurodegenerative diseases. Hypoxia-inducible factor (HIF) and its hydroxylases-Prolyl-4-hydroxyases (PHDs) have been found to modulate the inflammatory processes. Here, the effects of PHDs enzyme onlipopolysaccharide-induced neuroinflammation and neurocognitive deficits were investigated. BV2 microglia cells were stimulated by LPS (1 μg/ml) as neuroinflammation model in vitro. Dimethyloxalylglycine (DMOG, 100 μM) and PHD3-siRNA were used to suppress the expression of PHD3. In vivo, mice received consecutive intraperitoneal injection of LPS (500 μg/kg) for 7 days, and intraperitoneal injection of DMOG (100 mg/kg) was applied 1 h before LPS at the same days. Several neurobehavioral tests (Open field, Novel object recognition and Morris water maze) were used to measure cognitive function. RT-qPCR and Western blotting were used to investigate the expression of inflammatory cytokines, HIF-PHDs protein. Metabolic reprogramming was measured by seahorse method. The results revealed that LPS induced neuroinflammation and PHD3 expression in vivo and vitro. DMOG and PHD3knockout decreased expression of inflammatory cytokines and improved the metabolic reprogramming caused by LPS treatment. Furthermore, pretreatment of DMOG reversed learning and memory deficits in systemic LPS-exposed mice through anti-neuroinflammation, which is independent of DMOG angiogenesis. These findings suggested that PHD3 may mediate LPS-induced microglial activation and neuroinflammation-associated neurobehavioral deficits.
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Affiliation(s)
- Guoyao Ou
- Department of Anesthesiology, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Xuliang Jiang
- Department of Anesthesiology, Fudan University Shanghai Cancer Center, Shanghai, 200030, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200030, China
| | - Yixu Deng
- Department of Anesthesiology, Fudan University Shanghai Cancer Center, Shanghai, 200030, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200030, China
| | - Jing Dong
- Department of Anesthesiology, Fudan University Shanghai Cancer Center, Shanghai, 200030, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200030, China
| | - Weilong Xu
- Department of Anesthesiology, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Xiang Zhang
- Department of Anesthesiology, Fudan University Shanghai Cancer Center, Shanghai, 200030, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200030, China
| | - Jun Zhang
- Department of Anesthesiology, Huashan Hospital, Fudan University, Shanghai, 200040, China; Department of Anesthesiology, Fudan University Shanghai Cancer Center, Shanghai, 200030, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200030, China.
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Qiguiyin Decoction Improves Multidrug-Resistant Pseudomonas aeruginosa Infection in Rats by Regulating Inflammatory Cytokines and the TLR4/MyD88/NF-κB Signaling Pathway. BIOMED RESEARCH INTERNATIONAL 2022; 2022:5066434. [PMID: 35071595 PMCID: PMC8776462 DOI: 10.1155/2022/5066434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 10/27/2021] [Indexed: 11/17/2022]
Abstract
Pseudomonas aeruginosa (PA), a Gram-negative bacterium, has a high detection rate in hospital-acquired infections. Recently, the frequent appearance of multidrug-resistant (MDR) PA strain with high morbidity and mortality rates has aggravated the difficulty in treating infectious diseases. Due to its multiple resistance mechanisms, the commonly used antibiotics have gradually become less effective. Qiguiyin decoction (QGYD) is a clinically experienced prescription of Chinese herbal medicine, and its combined application with antibiotics has been confirmed to be effective in the clinical treatment of MDR PA infection, which could be a promising strategy for the treatment of drug-resistant bacterial infections. However, the mechanism of QGYD restoring antibiotics susceptibility to MDR PA remains unclear. In the present study, we investigated the effects of QGYD and levofloxacin (LEV) singly or in combination on MDR PA-induced pneumonia rat models. Further analysis was carried out in the serum differential expression profiles of inflammatory cytokines by cytokine antibody array. Besides, the lung TLR4/MyD88/NF-κB signaling pathway was detected by RT-qPCR. Our results showed that based on the treatment of MDR PA-infected rat model with LEV, the combination of QGYD improved the general state and immune organ index. Furthermore, it moderately increased the expressions of proinflammatory cytokines including IL-1β, IL-6, and TNF-α in the early stage of infection and decreased their release rapidly in the later stage, while regulated the same phase change of anti-inflammatory cytokine IL-10. In addition, the adhesion molecule ICAM-1 was significantly downregulated after QGYD combined with LEV treatment. Moreover, the mRNA expressions of TLR4, MyD88, NF-κB, and ICAM-1 were significantly downregulated. These results indicated that the mechanism of QGYD restoring LEV susceptibility to MDR PA was related to its regulation of inflammatory cytokines and the TLR4/MyD88/NF-κB signaling pathway, which provides theoretical support for the clinical application of QGYD combined with LEV therapy to MDR PA infection.
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Kim MJ, Choi B, Kim JY, Min Y, Kwon DH, Son J, Lee JS, Lee JS, Chun E, Lee KY. USP8 regulates liver cancer progression via the inhibition of TRAF6-mediated signal for NF-κB activation and autophagy induction by TLR4. Transl Oncol 2022; 15:101250. [PMID: 34688043 PMCID: PMC8546492 DOI: 10.1016/j.tranon.2021.101250] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 10/12/2021] [Indexed: 12/12/2022] Open
Abstract
Herein, we aimed to elucidate the molecular and cellular mechanism in which ubiquitin-specific protease 8 (USP8) is implicated in liver cancer progression via TRAF6-mediated signal. USP8 induces the deubiquitination of TRAF6, TAB2, TAK1, p62, and BECN1, which are pivotal roles for NF-κB activation and autophagy induction. Notably, the LIHC patient with low USP8 mRNA expression showed markedly shorter survival time, whereas there was no significant difference in the other 18-human cancers. Importantly, the TCGA data analysis on LIHC and transcriptome analysis on the USP8 knockout (USP8KO) SK-HEP-1 cells revealed a significant correlation between USP8 and TRAF6, TAB2, TAK1, p62, and BECN1, and enhanced NF-κB-dependent and autophagy-related cancer progression/metastasis-related genes in response to LPS stimulation. Furthermore, USP8KO SK-HEP-1 cells showed an increase in cancer migration and invasion by TLR4 stimulation, and a marked increase of tumorigenicity and metastasis in xenografted NSG mice. The results demonstrate that USP8 is negatively implicated in the LIHC progression through the regulation of TRAF6-mediated signal for the activation of NF-κB activation and autophagy induction. Our findings provide useful insight into the LIHC pathogenesis of cancer progression.
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Affiliation(s)
- Mi-Jeong Kim
- Department of Immunology and Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Bongkum Choi
- Department of Medicine, Sungkyunkwan University School of Medicine, Suwon, Republic of Korea
| | - Ji Young Kim
- Department of Immunology and Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Yoon Min
- Department of Immunology and Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Do Hee Kwon
- Department of Immunology and Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Juhee Son
- Department of Immunology and Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Ji Su Lee
- Department of Immunology and Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Joo Sang Lee
- Department of Precision medicine, Sungkyunkwan University School of Medicine, Suwon, Republic of Korea
| | - Eunyoung Chun
- CHA Vaccine Institute, 560 Dunchon-daero, Jungwon-gu, Seongnam-si, Gyeonggi-do 13230, Republic of Korea.
| | - Ki-Young Lee
- Department of Immunology and Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea; Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences and Technology, Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea.
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21
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Liu W, Tang P, Wang J, Ye W, Ge X, Rong Y, Ji C, Wang Z, Bai J, Fan J, Yin G, Cai W. Extracellular vesicles derived from melatonin-preconditioned mesenchymal stem cells containing USP29 repair traumatic spinal cord injury by stabilizing NRF2. J Pineal Res 2021; 71:e12769. [PMID: 34562326 DOI: 10.1111/jpi.12769] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 09/23/2021] [Accepted: 09/23/2021] [Indexed: 12/27/2022]
Abstract
Spinal cord injury (SCI) is a devastating trauma that leads to irreversible motor and sensory dysfunction and is, so far, without effective treatment. Recently, however, nano-sized extracellular vesicles derived from preconditioned mesenchymal stem cells (MSCs) have shown great promise in treating various diseases, including SCI. In this study, we investigated whether extracellular vesicles (MEVs) derived from MSCs pretreated with melatonin (MT), which is well recognized to be useful in treating diseases, including Alzheimer's disease, non-small cell lung cancer, acute ischemia-reperfusion liver injury, chronic kidney disease, and SCI, are better able to promote functional recovery in mice after SCI than extracellular vesicles derived from MSCs without preconditioning (EVs). MEVs were found to facilitate motor behavioral recovery more than EVs and to increase microglia/macrophages polarization from M1-like to M2-like in mice. Experiments in BV2 microglia and RAW264.7 macrophages confirmed that MEVs facilitate M2-like polarization and also showed that they reduce the production of reactive oxygen species (ROS) and regulate mitochondrial function. Proteomics analysis revealed that ubiquitin-specific protease 29 (USP29) was markedly increased in MEVs, and knockdown of USP29 in MEVs (shUSP29-MEVs) abolished MEVs-mediated benefits in vitro and in vivo. We then showed that USP29 interacts with, deubiquitinates and therefore stabilizes nuclear factor-like 2 (NRF2), thereby regulating microglia/macrophages polarization. In NRF2 knockout mice, MEVs failed to promote functional recovery and M2-like microglia/macrophages polarization. We also showed that MT reduced global N6-methyladenosine (m6 A) modification and levels of the m6 A "writer" methyltransferase-like 3 (METTL3). The stability of USP29 mRNA in MSCs was enhanced by treatment with MT, but inhibited by overexpression of METTL3. This study describes a very promising extracellular vesicle-based approach for treating SCI.
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Affiliation(s)
- Wei Liu
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Pengyu Tang
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jiaxing Wang
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Wu Ye
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Xuhui Ge
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Yuluo Rong
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Chengyue Ji
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Zhuanghui Wang
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jianling Bai
- Department of Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jin Fan
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Guoyong Yin
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Weihua Cai
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
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22
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MiR-124 Prevents the Microglial Proinflammatory Response by Inhibiting the Activities of TLR4 and Downstream NLRP3 in Palmitic Acid-Treated BV2 Cells. J Mol Neurosci 2021; 72:496-506. [PMID: 34652636 DOI: 10.1007/s12031-021-01921-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 09/22/2021] [Indexed: 10/20/2022]
Abstract
Neuroinflammation is a mechanism by which obesity or a high-fat diet leads to cognitive impairment. MiR-124, a highly expressed microRNA in the brain, can alleviate neuroinflammation by regulating microglial activation, but its mechanism is unclear. The aim of the study was to explore whether miR-124 exerted this effect through TLR4/MyD88/NF-κB p65/NLRP3 signaling in palmitic acid-treated BV2 cells. Prepared BV2 cells were treated with palmitic acid to establish an in vitro model of a high-fat diet. An miR-124 mimic and inhibitor were adopted to upregulate and downregulate the expression of miR-124, respectively. TAK-242 and NLRP3 siRNA were used to downregulate the expression of TLR4 and NLRP3. The expression levels of miR-124, signaling proteins (TLR4, MyD88, and NF-κB p65), inflammasome markers (NLRP3 and IL-1β), and microglial activated markers (CD206, Arg-1, CD86, and iNOS) were measured by qPCR and western blotting. The pyroptosis rate was assessed using flow cytometry. First, palmitic acid upregulated TLR4/MyD88/NF-κB p65 signaling, increased NLRP3 expression, elevated the pyroptosis rate, and promoted the microglial proinflammatory response in BV2 cells. Second, the miR-124 mimic and inhibitor separately alleviated and aggravated the effect of palmitic acid on microglial activation and NLRP3 expression. The miR-124 mimic also downregulated TLR4/MyD88/NF-κB p65 signaling. Third, TAK-242 did not affect the expression of miR-124 but simulated the protective effect of the miR-124 mimic on microglial activation and NLRP3 expression. Fourth, NLRP3 siRNA also inhibited the microglial proinflammatory response in BV2 cells. MiR-124 prevented the microglial proinflammatory response through TLR4/MyD88/NF-κB p65/NLRP3 signaling in palmitic acid-treated BV2 cells.
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23
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Xu G, Wan H, Yi L, Chen W, Luo Y, Huang Y, Liu X. Berberine administrated with different routes attenuates inhaled LPS-induced acute respiratory distress syndrome through TLR4/NF-κB and JAK2/STAT3 inhibition. Eur J Pharmacol 2021; 908:174349. [PMID: 34284014 PMCID: PMC8285933 DOI: 10.1016/j.ejphar.2021.174349] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 07/07/2021] [Accepted: 07/12/2021] [Indexed: 12/17/2022]
Abstract
Accumulating evidence showed that berberine possessed the anti-inflammatory action in various diseases caused by inflammation. However, it was still unclear whether both inhalation and injection with berberine produced pulmonary protective role in acute respiratory distress syndrome (ARDS). This study was aimed to evaluate the effects of both administration routes including inhalation and injection with berberine in ARDS induced by lipopolysaccharide (LPS) inhalation. Histopathological examination and weight of lung were evaluated. Phosphorylation of NF-κB, JAK2 and STAT3 were measured to assess the activity of inflammation related signaling pathways. Proinflammatory cytokines including interleukin (IL)-1β and tumor necrosis factor (TNF)-α in the bronchoalveolar lavage fluid (BALF) and serum were also detected. The results showed that LPS caused the lung injury, while both administration routes with berberine attenuated the injury and improved the pulmonary morphology. In addition, the primary TLR4/NF-κB and secondary JAK2/STAT3 signaling pathways which were activated by LPS in lung were totally inhibited by berberine administration. Moreover, proinflammatory cytokines in both BALF and serum were decreased by berberine. Considering that molecular docking simulation indicated that berberine could bind with TLR4, the present suggested that the inhibition of the inflammation related TLR4/NF-κB and JAK2/STAT3 signaling pathways might be involved in the pulmonary protective effect of berberine in LPS-induced ARDS.
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Affiliation(s)
- Guanghui Xu
- Pharmaceutical Research Center, Xiamen Medicine Research Institute, Xiamen, 361008, Fujian province, PR China.
| | - Huiqi Wan
- Pharmaceutical Research Center, Xiamen Medicine Research Institute, Xiamen, 361008, Fujian province, PR China
| | - Litao Yi
- Department of Chemical and Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, Fujian province, PR China.
| | - Wei Chen
- Pharmaceutical Research Center, Xiamen Medicine Research Institute, Xiamen, 361008, Fujian province, PR China
| | - Youhua Luo
- Pharmaceutical Research Center, Xiamen Medicine Research Institute, Xiamen, 361008, Fujian province, PR China
| | - Yiqi Huang
- Pharmaceutical Research Center, Xiamen Medicine Research Institute, Xiamen, 361008, Fujian province, PR China
| | - Xiaojuan Liu
- Pharmaceutical Research Center, Xiamen Medicine Research Institute, Xiamen, 361008, Fujian province, PR China
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24
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Li J, Jiang H, Wu P, Li S, Han B, Yang Q, Wang X, Han B, Deng N, Qu B, Zhang Z. Toxicological effects of deltamethrin on quail cerebrum: Weakened antioxidant defense and enhanced apoptosis. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 286:117319. [PMID: 33990053 DOI: 10.1016/j.envpol.2021.117319] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 04/16/2021] [Accepted: 05/03/2021] [Indexed: 06/12/2023]
Abstract
Deltamethrin is the most common type II synthetic pyrethroid insecticide, and has posed widespread residues to environment. However, whether deltamethrin has potential toxic effects on quail cerebrum remains greatly obscure. Accordingly, we investigated the impact of chronic exposure to deltamethrin on oxidative stress and apoptosis in quail cerebrum. Quails upon 12-week exposure of deltamethrin (0, 15, 30, or 45 mg/kg body weight intragastric administration) were used as a cerebrum injury model. The results showed that deltamethrin treatment led to cerebral injury dose-dependently through the weakened antioxidant defense by downregulating nuclear factor erythroid-2-related factor 2 (Nrf2) and its downstream proteins levels and mRNA expression. Furthermore, deltamethrin treatment induced apoptosis in cerebrum by decreasing B-cell lymphoma gene 2 (Bcl-2) level, as well as increasing Jun N-terminal kinase3, caspase-3, and Bcl-2-associated X protein levels. Simultaneously, toll-like receptor 4 (TLR4) downstream inflammation-related genes or proteins were significantly up-regulated by deltamethrin dose-dependently. Altogether, our study demonstrated that chronic exposure to deltamethrin induces inflammation and apoptosis in quail cerebrums by promoting oxidative stress linked to inhibition of the Nrf2/TLR4 signaling pathway. These results provide a novel knowledge on the chronic toxic effect of deltamethrin, and establish a theoretical foundation for the evaluation of pesticide-induced health risk.
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Affiliation(s)
- Jiayi Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Huijie Jiang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Pengfei Wu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Siyu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Bing Han
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Qingyue Yang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Xiaoqiao Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Biqi Han
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Ning Deng
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Bing Qu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Zhigang Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Harbin, 150030, China.
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25
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Xie X, Li M, Zhou M, Chow SF, Tsang CK. Pharmacological preconditioning by TERT inhibitor BIBR1532 confers neuronal ischemic tolerance through TERT-mediated transcriptional reprogramming. J Neurochem 2021; 159:690-709. [PMID: 34532857 DOI: 10.1111/jnc.15515] [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: 04/20/2021] [Revised: 08/25/2021] [Accepted: 09/13/2021] [Indexed: 11/30/2022]
Abstract
After a sublethal ischemic preconditioning (IPC) stimulus, the brain has a remarkable capability of acquiring tolerance to subsequent ischemic insult by establishing precautionary self-protective mechanism. Understanding this endogenous mechanism would reveal novel and effective neuroprotective targets for ischemic brain injury. Our previous study has implied that telomerase reverse transcriptase (TERT) is associated with IPC-induced tolerance. Here, we investigated the mechanism of TERT-mediated ischemic tolerance. Preconditioning was modeled by oxygen-glucose deprivation (OGD) and by TERT inhibitor BIBR1532 in primary neurons. We found that ischemic tolerance was conferred by BIBR1532 preconditioning. We used the Cleavage-Under-Targets-And-Tagmentation approach, a recently developed method with superior signal-to-noise ratio, to comprehensively map the genomic binding sites of TERT in primary neurons, and showed that more than 50% of TERT-binding sites were located at the promoter regions. Mechanistically, we demonstrated that under normal conditions TERT physically bound to many previously unknown genomic loci in neurons, whereas BIBR1532 preconditioning significantly altered TERT-chromatin-binding profile. Intriguingly, we found that BIBR1532-preconditioned neurons showed significant up-regulation of promoter binding of TERT to the mitochondrial anti-oxidant genes, which were correlated with their elevated expression. Functional analysis further indicated that BIBR1532-preconditioning significantly reduced ROS levels and enhanced tolerance to severe ischemia-induced mitochondrial oxidative stress in neurons in a TERT-dependent manner. Together, these results demonstrate that BIBR1532 confers neuronal ischemic tolerance through TERT-mediated transcriptional reprogramming for up-regulation of mitochondrial anti-oxidation gene expression, suggesting the translational potential of BIBR1532 as a therapeutic agent for the treatment of cerebral ischemic injury and oxidative stress-induced neurological disorders.
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Affiliation(s)
- Xuemin Xie
- Clinical Neuroscience Institute, The First Affiliated Hospital of Jinan University, Guangzhou, China.,Department of Neurology, The First Clinical Medical School of Jinan University, Guangzhou, China
| | - Mingxi Li
- Clinical Neuroscience Institute, The First Affiliated Hospital of Jinan University, Guangzhou, China.,Department of Neurology, The First Clinical Medical School of Jinan University, Guangzhou, China
| | - Mengyao Zhou
- Clinical Neuroscience Institute, The First Affiliated Hospital of Jinan University, Guangzhou, China.,Core Research Center, The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Shing Fung Chow
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong Special Administrative Region, Hong Kong, China
| | - Chi Kwan Tsang
- Clinical Neuroscience Institute, The First Affiliated Hospital of Jinan University, Guangzhou, China
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26
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Treadmill exercise alleviates neuronal damage by suppressing NLRP3 inflammasome and microglial activation in the MPTP mouse model of Parkinson's disease. Brain Res Bull 2021; 174:349-358. [PMID: 34224819 DOI: 10.1016/j.brainresbull.2021.06.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 06/18/2021] [Accepted: 06/29/2021] [Indexed: 12/16/2022]
Abstract
Treadmill exercise has been recognized as an effectively therapeutic strategy for Parkinson's disease (PD). However, its exact molecular mechanism of promoting PD remain unclear. Recently, the NLRP3 inflammasome is considered to play a critical role in the pathogenesis of PD. In this study, we investigated whether NLRP3 inflammasome was involved in treadmill exercise-induced neuroprotection and anti-inflammation effect in the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) model of PD. 8-week-old male mice (C57BL/6 strain) were divided into four groups: Control, MPTP, MPTP + EX and EX. MPTP was intraperitoneally injected into mice to establish chronic PD model. The open-field test and pole test were used to assess motor function. The results showed that treadmill exercise significantly alleviated motor dysfunction and dopaminergic neuron degeneration induced by MPTP. In addition, we also found that treadmill exercise suppressed MPTP-triggered microglia activation and the co-localization of NLRP3+/Iba-1+ cells in the substantia nigra. These effects were associated with suppression NLRP3 inflammasome via down-regulation of TLR4/MyD88/NF-κB pathway. Overall, our study demonstrated that treadmill exercise could effectively alleviates neuronal damage via inhibition of NLRP3 inflammasome and microglial activation in MPTP-induced PD mouse model.
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27
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Zhao X, Zhao B, Zhao Y, Zhang Y, Qian M. Protective effect of anisodamine on bleomycin-induced acute lung injury in immature rats via modulating oxidative stress, inflammation, and cell apoptosis by inhibiting the JAK2/STAT3 pathway. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:859. [PMID: 34164493 PMCID: PMC8184412 DOI: 10.21037/atm-21-1750] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background Pediatric acute lung injury (ALI) is one of the most common causes of infant mortality. Although lung-protective strategies have developed in recent years, no ALI treatment is currently available. Anisodamine (Ani) is a common drug used to treat gastrointestinal smooth muscle spasm. The protective effects of Ani against acute kidney injury and myocardial injury have been reported. However, the efficacy of Ani on bleomycin (BLM)-induced ALI has not been examined previously. In the present study, we aimed to examine the effects of Ani on bleomycin (BLM)-induced ALI on immature rats. Methods The ALI rat model was established by intratracheally administration of BLM. Ani treatment was performed by an intravenous injection at different concentrations. The lung function of each rat was measured, and then lung tissue structures, apoptosis, and collagen deposition were observed by hematoxylin-eosin staining, terminal deoxynucleotidyl transferase-mediated digoxigenin-dUTP nick-end labeling assay, and Masson’s staining, respectively. Enzyme-linked immunosorbent assay was used to detect the levels of inflammatory cytokines. The expression of apoptosis-related proteins and fibrosis-related markers was determined by reverse transcription-polymerase chain reaction and/or Western blot analysis. Finally, the expression levels of Janus tyrosine kinase 2 (JAK2) and signal transducer and activator of transcription 3 (STAT3) were determined. Results Our findings indicated that lung function was remarkably decreased in BLM-induced rats, which could be reversed by Ani. Ani treatment increased the levels of antioxidant enzymes, decreased the apoptotic rate and apoptosis-related proteins, and downregulated the expression of fibrosis-related markers. Additionally, Ani treatment also attenuated inflammatory response and suppressed the activation of the JAK2/STAT3 pathway. Conclusions Our results demonstrated that Ani had potent activity against BLM-induced ALI in immature rats through inhibiting the JAK2/STAT3 signaling pathway. Our findings provide supporting evidence to further investigate the therapeutic effect of Ani against ALI in children.
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Affiliation(s)
- Xiaoqi Zhao
- Department of Neonatology, the Second Hospital of Jilin University, Changchun, China
| | - Bin Zhao
- Department of Neurosurgery, the Second Hospital of Jilin University, Changchun, China
| | - Yinghao Zhao
- Department of Thoracic Surgery, the Second Hospital of Jilin University, Changchun, China
| | - Yunfeng Zhang
- Department of Neonatology, the Second Hospital of Jilin University, Changchun, China
| | - Min Qian
- Department of Neonatology, the Second Hospital of Jilin University, Changchun, China
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Wu K, Yao G, Shi X, Zhang H, Zhu Q, Liu X, Lu G, Hu L, Gong W, Yang Q, Ding Y. Asiaticoside ameliorates acinar cell necrosis in acute pancreatitis via toll-like receptor 4 pathway. Mol Immunol 2020; 130:122-132. [PMID: 33308902 DOI: 10.1016/j.molimm.2020.11.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 11/10/2020] [Accepted: 11/23/2020] [Indexed: 12/19/2022]
Abstract
Acinar cell necrosis is one of the most prominent pathophysiological changes of acute pancreatitis (AP). Asiaticoside (AS) is a triterpene compound with confirmed apoptosis-and necrosis-related activities. However, the specific effects of AS on AP have not been determined. In this study, we aimed to investigate the protective effect of AS on AP using two mouse models. In the caerulein-induced mild acute pancreatitis (MAP) model, We found that AS administration reduced serum amylase levels and alleviated the histopathological manifestations of pancreatic tissue in a dose-dependent manner. And the levels of toll-like receptor 4 (TLR4) and necrotic related proteins (RIP3 and p-MLKL) of pancreatic tissue were reduced after AS administration. In addition, TLR4 deficiency eliminated the protective effect of AS on AP induced by caerulein in mice. Correspondingly, we elucidated the effect of AS in vitro and found that AS protected against pancreatic acinar cells necrosis and TAK-242 counteracted this protective effect. Meanwhile, we found that AS ameliorated the severity of pancreatic tissue injury and pancreatitis-associated lung injury in a severe acute pancreatitis model induced by l-arginine. Furthermore, Molecular docking results revealed interaction between AS and TLR4. Taken together, our data for the first time confirmed the protective effects of AS on AP in mice via TLR4 pathway.
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Affiliation(s)
- Keyan Wu
- Pancreatic Center, Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China.
| | - Guanghuai Yao
- Pancreatic Center, Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China.
| | - Xiaolei Shi
- Department of Critical Care Medicine, PLA Key Laboratory of Emergency and Critical Care Research, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, 210000, PR China.
| | - Huan Zhang
- Medical College of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China.
| | - Qingtian Zhu
- Pancreatic Center, Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China.
| | - Xinnong Liu
- Department of General Surgery, Affiliated Hospital of Yangzhou University, Yangzhou University, Jiangsu, PR China.
| | - Guotao Lu
- Pancreatic Center, Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China.
| | - Lianghao Hu
- Department of Gastroenterology, Changhai Hospital, Second Military Medical University, Shanghai, PR China.
| | - Weijuan Gong
- Pancreatic Center, Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China.
| | - Qi Yang
- Department of Critical Care Medicine, PLA Key Laboratory of Emergency and Critical Care Research, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, 210000, PR China.
| | - Yanbing Ding
- Pancreatic Center, Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China.
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Sun J, Shen D, Gao Y, Zheng Y, Zhao L, Maa M, Liu H, Chen X. Down-Regulation of USP8 Suppresses HER-3 Positive Gastric Cancer Cells Proliferation. Onco Targets Ther 2020; 13:7973-7984. [PMID: 32848421 PMCID: PMC7429216 DOI: 10.2147/ott.s264108] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 07/27/2020] [Indexed: 12/22/2022] Open
Abstract
Background Ubiquitin specific peptidase 8 (USP8) has been reported to induce the degradation of several receptor tyrosine kinases such as epidermal growth factor receptor (EGFR), among which human epidermal growth factor receptor-3 (HER-3) is one of them. However, the role and functional mechanisms of USP8 and HER-3 in gastric cancer (GC) remain unknown. Objective To explore the function and mechanism of USP8 and HER-3 in the progression of GC. Materials and Methods Eighty-eight patients with histologically confirmed GC were recruited for this study. Tumor samples and GC cell lines were used to detect USP8 and HER-3 levels. MGC803 (HER-3 negative GC cell) was selected as the control group and NCI-N87, MKN-45 and AGS (HER-3 positive GC cells) as the experimental group. USP8i and si-RNA were then used to down-regulate USP8 in each group. Apoptosis and cell-cycle experiments were performed to detect the effects of USP8 on GC cells. Cytotoxicity Assay Kit (MTT) and colony formation assays were used to analyze cell proliferation. Cell migration and invasion ability were examined by wound healing. The expression of related mRNA and protein was detected by Western blot and quantitative real-time PCR (qRT-PCR). In vivo experiments were used to examine the effect of USP8 and HER-3. Results Patients with high expression of USP8 or HER-3 tumors alone died earlier than those with low expression and the patients with both USP8 and HER-3 high expression had a shorter overall survival than those with the opposite pattern (both USP8 and HER-3 low expression). Down-regulation of USP8 inhibited cell proliferation and cell metastasis and also reduced the HER-3 expression. We also observed that down-regulation of USP8 inhibited the proliferation of GC cells which highly expressed HER-3. Moreover, down-regulation of USP8 could promote the apoptosis of HER3-positive GC cells and inhibit the proliferation of them by affecting the cell-cycle. In vivo studies demonstrated that down-regulation of USP8 inhibited HER-3 positive tumors growth. Conclusion Down-regulation of USP8 inhibits HER-3 positive GC cells proliferation in vivo and in vitro, which indicate that USP8 represents a feasible choice as a therapeutic target for HER-3 positive GC cells.
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Affiliation(s)
- Jiangang Sun
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Dandan Shen
- Key Laboratory of Advanced Pharmaceutical Technology, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Yongshun Gao
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Yichao Zheng
- Key Laboratory of Advanced Pharmaceutical Technology, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Lijuan Zhao
- Key Laboratory of Advanced Pharmaceutical Technology, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Mamum Maa
- Key Laboratory of Advanced Pharmaceutical Technology, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Hongmin Liu
- Key Laboratory of Advanced Pharmaceutical Technology, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Xiaoping Chen
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, People's Republic of China.,Department of Hepatic Surgery of Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
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