1
|
Su XM, Zhang DS, Zhang N. Chrysophanol accelerates astrocytic mitochondria transfer to neurons and attenuates the cerebral ischemia-reperfusion injury in rats. Biochem Biophys Res Commun 2024; 704:149712. [PMID: 38408414 DOI: 10.1016/j.bbrc.2024.149712] [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: 02/13/2024] [Accepted: 02/21/2024] [Indexed: 02/28/2024]
Abstract
Astrocytes transfer extracellular functional mitochondria into neurons to rescue injured neurons after a stroke. However, there are no reports on drugs that interfere with intercellular mitochondrial transfer. Chrysophanol (CHR) was an effective drug for the treatment of cerebral ischemia-reperfusion injury (CIRI) and was selected as the test drug. The oxygen-glucose deprivation/reoxygenation (OGD/R) cell model and the middle cerebral artery occlusion animal model were established to investigate the effect of CHR on CIRI. The result showed that astrocytes could act as mitochondrial donors to ameliorate neuronal injury. Additionally, the neuroprotective effect of astrocytes was enhanced by CHR, the CHR improved the neuronal mitochondrial function, decreased the neurological deficit score and infarction volume, recovered cell morphology in ischemic penumbra. The mitochondrial fluorescence probe labeling technique has shown that the protective effect of CHR is associated with accelerated astrocytic mitochondrial transfer to neurons. The intercellular mitochondrial transfer may be an important way to ameliorate ischemic brain injury and be used as a key target for drug treatment.
Collapse
Affiliation(s)
- Xiao-Mei Su
- Department of Pharmacology, College of Basic Medicine, Hebei Medical University, No. 361, Zhongshan East Road, Shijiazhuang, Hebei, 050017, China
| | - Dan-Shen Zhang
- Department of Pharmacology, College of Basic Medicine, Hebei Medical University, No. 361, Zhongshan East Road, Shijiazhuang, Hebei, 050017, China; College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, No. 26, Yuxiang Street, Shijiazhuang, Hebei, 050018, China.
| | - Nan Zhang
- Central Laboratory, Hebei Key Laboratory of Brain Science and Psychiatric-Psychologic Disease, The First Hospital of Hebei Medical University, No. 89, Donggang Road, Shijiazhuang, Hebei, 050030, China.
| |
Collapse
|
2
|
Huang X, Tan J, Ji Y, Luo J, Zhao Y, Zhao J. BRCC3 mediates inflammation and pyroptosis in cerebral ischemia/reperfusion injury by activating the NLRP6 inflammasome. CNS Neurosci Ther 2024; 30:e14697. [PMID: 38544474 PMCID: PMC10973773 DOI: 10.1111/cns.14697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 01/09/2024] [Accepted: 01/10/2024] [Indexed: 04/04/2024] Open
Abstract
AIMS Neuroinflammation and pyroptosis are key mediators of cerebral ischemia/reperfusion (I/R) injury-induced pathogenic cascades. BRCC3, the human homolog of BRCC36, is implicated in neurological disorders and plays a crucial role in neuroinflammation and pyroptosis. However, its effects and potential mechanisms in cerebral I/R injury in mice are unclear. METHODS Cellular localization of BRCC3 and the interaction between BRCC3 and NLRP6 were assessed. Middle cerebral artery occlusion/reperfusion (MCAO) and oxygen-glucose deprivation/reoxygenation (OGD/R) models were established in mice and HT22 cells, respectively, to simulate cerebral I/R injury in vivo and in vitro. RESULTS BRCC3 protein expression peaked 24 h after MCAO and OGD/R. BRCC3 knockdown reduced the inflammation and pyroptosis caused by cerebral I/R injury and ameliorated neurological deficits in mice after MCAO. The effects of BRCC3 on inflammation and pyroptosis may be mediated by NLRP6 inflammasome activation. Moreover, both BRCC3 and its N- and C-terminals interacted with NLRP6, and both BRCC3 and its terminals reduced NLRP6 ubiquitination. Additionally, BRCC3 affected the interaction between NLRP6 and ASC, which may be related to inflammasome activation. CONCLUSION BRCC3 shows promise as a novel target to enhance neurological recovery and attenuate the inflammatory responses and pyroptosis caused by NLRP6 activation in cerebral I/R injury.
Collapse
Affiliation(s)
- Xiaohuan Huang
- Department of PathologyChongqing Medical UniversityChongqingChina
- Department of PathologyChongqing Three Gorges Medical CollegeWanzhouChina
| | - Junyi Tan
- Department of PathophysiologyChongqing Medical UniversityChongqingChina
| | - Yanyan Ji
- Department of PathologyChongqing Medical UniversityChongqingChina
| | - Jing Luo
- Department of PathologyChongqing Medical UniversityChongqingChina
- Department of NeurologyThe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Yong Zhao
- Department of PathologyChongqing Medical UniversityChongqingChina
| | - Jing Zhao
- Department of PathophysiologyChongqing Medical UniversityChongqingChina
| |
Collapse
|
3
|
Guo Y, Song J, Yan M, Chen Y, Huang L, Liu J, He Y, Lü Y, Yu W. The role of NLRP6 in the development and progression of neurological diseases. Mol Biol Rep 2024; 51:351. [PMID: 38400865 DOI: 10.1007/s11033-024-09293-z] [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: 12/11/2023] [Accepted: 01/29/2024] [Indexed: 02/26/2024]
Abstract
The nervous system possesses the remarkable ability to undergo changes in order to store information; however, it is also susceptible to damage caused by invading pathogens or neurodegenerative processes. As a member of nucleotide-binding oligomerization domain-like receptor (NLR) family, the NLRP6 inflammasome serves as a cytoplasmic innate immune sensor responsible for detecting microbe-associated molecular patterns. Upon activation, NLRP6 can recruit the adapter protein apoptosis-associated speck-like protein (ASC) and the inflammatory factors caspase-1 or caspase-11. Consequently, inflammasomes are formed, facilitating the maturation and secretion of pro-inflammatory cytokines such as inflammatory factors-18 (IL-18) and inflammatory factors-1β (IL-1β). Precise regulation of NLRP6 is crucial for maintaining tissue homeostasis, as dysregulated inflammasome activation can contribute to the development of various diseases. Furthermore, NLRP6 may also play a role in the regulation of extraintestinal diseases. In cells of the brain, such as astrocytes and neurons, NLRP6 inflammasome are also present. Here, the assembly and subsequent activation of caspase-1 mediated by NLRP6 contribute to disease progression. This review aims to discuss the structure and function of NLRP6, explain clearly the mechanisms that induce and activate NLRP6, and explore its role within the central and peripheral nervous system.
Collapse
Affiliation(s)
- Yiming Guo
- Institute of Neuroscience, Chongqing Medical University, No. 1, Yixuayuan Road, Yuzhong District, Chongqing, 400016, China
| | - Jiaqi Song
- Institute of Neuroscience, Chongqing Medical University, No. 1, Yixuayuan Road, Yuzhong District, Chongqing, 400016, China
| | - Mengyu Yan
- Institute of Neuroscience, Chongqing Medical University, No. 1, Yixuayuan Road, Yuzhong District, Chongqing, 400016, China
| | - Yingxi Chen
- Institute of Neuroscience, Chongqing Medical University, No. 1, Yixuayuan Road, Yuzhong District, Chongqing, 400016, China
| | - Lihong Huang
- Institute of Neuroscience, Chongqing Medical University, No. 1, Yixuayuan Road, Yuzhong District, Chongqing, 400016, China
| | - Jiarui Liu
- Department of Geriatrics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Yurou He
- Institute of Neuroscience, Chongqing Medical University, No. 1, Yixuayuan Road, Yuzhong District, Chongqing, 400016, China
| | - Yang Lü
- Department of Geriatrics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Weihua Yu
- Institute of Neuroscience, Chongqing Medical University, No. 1, Yixuayuan Road, Yuzhong District, Chongqing, 400016, China.
| |
Collapse
|
4
|
Ferrara F, Pecorelli A, Valacchi G. Redox Regulation of Nucleotide-Binding and Oligomerization Domain-Like Receptors Inflammasome. Antioxid Redox Signal 2023; 39:744-770. [PMID: 37440315 DOI: 10.1089/ars.2022.0180] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/15/2023]
Abstract
Significance: Inflammasomes are multimeric complexes that, as part of the innate immune response, sense a wide range of pathogenic and sterile stimuli. They consist of three components, namely a sensor protein, an adaptor, and procaspase-1, which once activated result in secretion of proinflammatory interleukin (IL)-1β and IL-18 and, eventually, in a gasdermin D-dependent lytic cell death called pyroptosis. Recent Advances: Since their discovery 20 years ago, the molecular mechanisms underlying the regulation of inflammasomes have been extensively studied. Oxidative stress appears as a major contributor to modulate inflammasomes, especially NLRP3 as well as NLRP1, NLRP6, and NLRC4. Growing evidence supports the idea that the positive feedback between redox imbalance and inflammasome-driven inflammation fuels an OxInflammatory state in a variety of human pathologies. Critical Issues: The current knowledge about the redox signaling pathways involved in inflammasomes activation and functions are here highlighted. In addition, we discuss the role of this complex molecular network interaction in the onset and progression of pathological conditions including neurological and metabolic diseases as well as skin disorders, also with an insight on COVID-19-related pathology. Finally, the therapeutic strategies able to mitigate the redox-mediated inflammasome activation with synthetic and natural compounds as well as by acting on inflammasome-related post-translational modifications and microRNAs are also addressed. Future Directions: Further investigations leading to a deeper understanding of the reciprocal interaction between inflammasomes and reactive oxygen species will help identify other molecular targets for modulating their hyperactivated state, and to design novel therapeutics for chronic OxInflammatory conditions. Antioxid. Redox Signal. 39, 744-770.
Collapse
Affiliation(s)
- Francesca Ferrara
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Ferrara, Italy
| | - Alessandra Pecorelli
- Department of Environmental Sciences and Prevention, University of Ferrara, Ferrara, Italy
- Plants for Human Health Institute, Animal Science Dept., North Carolina State University, Kannapolis, North Carolina, USA
| | - Giuseppe Valacchi
- Department of Environmental Sciences and Prevention, University of Ferrara, Ferrara, Italy
- Plants for Human Health Institute, Animal Science Dept., North Carolina State University, Kannapolis, North Carolina, USA
- Department of Food and Nutrition, Kyung Hee University, Seoul, Republic of Korea
| |
Collapse
|
5
|
Chang L, Tian Y, Xu L, Hao Q, Song L, Lu Y, Zhen Y. Spotlight on NLRP6 and Tumor Research Situation: A Potential Cancer Participant. J Immunol Res 2023; 2023:6613064. [PMID: 37415625 PMCID: PMC10322559 DOI: 10.1155/2023/6613064] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 05/29/2023] [Accepted: 06/04/2023] [Indexed: 07/08/2023] Open
Abstract
NOD-like receptor family pyrin domain containing 6 (NLRP6) is a new pattern recognition receptor in the mammalian innate immune system. Both the liver and the gut exhibit substantial levels of cytoplasmic expression. It can speed up cell response to endogenous danger signals or exogenous pathogen infection. NLRP6 can function in various ways as an inflammasome or a noninflammasome. The understanding of NLRP6 is steadily increasing thanks to ongoing investigations, but due to discrepancies in how those studies have described their link with tumors, the significance of NLRP6 in the emergence of cancer is still debatable as of this writing. This article will use the structure and function of NLRP6 as the pivotal point and thoroughly explain the present interactions between NLRP6 and tumors and any possible clinical benefits.
Collapse
Affiliation(s)
| | - Yuying Tian
- Inner Mongolia Medical University, Hohhot, Inner Mongolia, China
| | - Lei Xu
- Guizhou Medical University, Guiyang, Guizhou, China
| | - Qiuyao Hao
- Guizhou Medical University, Guiyang, Guizhou, China
| | - Lingyu Song
- Department of Gastroenterology, Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, China
| | - Yinying Lu
- Comprehensive Liver Cancer Center, The Fifth Medical Center of PLA General Hospital, Beijing 100039, China
| | - Yunhuan Zhen
- Department of Colorectal Surgery, Affiliated Hospital of Guizhou Medical University, Guiyang 550004 Guizhou, China
| |
Collapse
|
6
|
Li J, Xu P, Hong Y, Xie Y, Peng M, Sun R, Guo H, Zhang X, Zhu W, Wang J, Liu X. Lipocalin-2-mediated astrocyte pyroptosis promotes neuroinflammatory injury via NLRP3 inflammasome activation in cerebral ischemia/reperfusion injury. J Neuroinflammation 2023; 20:148. [PMID: 37353794 DOI: 10.1186/s12974-023-02819-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 05/26/2023] [Indexed: 06/25/2023] Open
Abstract
BACKGROUND Neuroinflammation is a vital pathophysiological process during ischemic stroke. Activated astrocytes play a major role in inflammation. Lipocalin-2 (LCN2), secreted by activated astrocytes, promotes neuroinflammation. Pyroptosis is a pro-inflammatory form of programmed cell death that has emerged as a new area of research in stroke. Nevertheless, the potential role of LCN2 in astrocyte pyroptosis remains unclear. METHODS An ischemic stroke model was established by middle cerebral artery occlusion (MCAO) in vivo. In this study, in vitro, oxygen-glucose deprivation and reoxygenation (O/R) were applied to cultured astrocytes. 24p3R (the LCN2 receptor) was inhibited by astrocyte-specific adeno-associated virus (AAV-GFAP-24p3Ri). MCC950 and Nigericin sodium salt (Nig) were used to inhibit or promote the activation of NLRP3 inflammasome pharmacologically, respectively. Histological and biochemical analyses were performed to assess astrocyte and neuron death. Additionally, the neurological deficits of mice were evaluated. RESULTS LCN2 expression was significantly induced in astrocytes 24 h after stroke onset in the mouse MCAO model. Lcn2 knockout (Lcn2-/-) mice exhibited reduced infarct volume and improved neurological and cognitive functions after MCAO. LCN2 and its receptor 24p3R were colocalized in astrocytes. Mechanistically, suppression of 24p3R by AAV-GFAP-24p3Ri alleviated pyroptosis-related pore formation and the secretion of pro-inflammatory cytokines via LCN2, which was then reversed by Nig-induced NLRP3 inflammasome activation. Astrocyte pyroptosis was exacerbated in Lcn2-/- mice by intracerebroventricular administration of recombinant LCN2 (rLCN2), while this aggravation was restricted by blocking 24p3R or inhibiting NLRP3 inflammasome activation with MCC950. CONCLUSION LCN2/24p3R mediates astrocyte pyroptosis via NLRP3 inflammasome activation following cerebral ischemia/reperfusion injury.
Collapse
Affiliation(s)
- Juanji Li
- Department of Neurology, Nanjing Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, 210002, Jiangsu, China
| | - Pengfei Xu
- Division of Life Sciences and Medicine, Department of Neurology, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, 230001, Anhui, China
| | - Ye Hong
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210002, Jiangsu, China
| | - Yi Xie
- Department of Neurology, Nanjing Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, 210002, Jiangsu, China
| | - Mengna Peng
- Department of Neurology, Nanjing Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, 210002, Jiangsu, China
| | - Rui Sun
- Department of Neurology, Shanghai Changhai Hospital, Second Military Medical University/Naval Medical University, Shanghai, 200433, China
| | - Hongquan Guo
- Department of Neurology, Nanjing Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, 210002, Jiangsu, China
| | - Xiaohao Zhang
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210002, Jiangsu, China
| | - Wusheng Zhu
- Department of Neurology, Nanjing Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, 210002, Jiangsu, China
| | - Junjun Wang
- Department of Clinical Laboratory, Affiliated Jinling Hospital, Medical School of Nanjing University, 305# East Zhongshan Road, Nanjing, 210002, Jiangsu, China.
| | - Xinfeng Liu
- Department of Neurology, Nanjing Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, 210002, Jiangsu, China.
- Division of Life Sciences and Medicine, Department of Neurology, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, 230001, Anhui, China.
| |
Collapse
|
7
|
Yu Z, Zheng L, Geng Y, Zhang Y, Wang Y, You G, Cai M, Li M, Cheng X, Zan J. FTO alleviates cerebral ischemia/reperfusion-induced neuroinflammation by decreasing cGAS mRNA stability in an m6A-dependent manner. Cell Signal 2023:110751. [PMID: 37321527 DOI: 10.1016/j.cellsig.2023.110751] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 05/28/2023] [Accepted: 06/02/2023] [Indexed: 06/17/2023]
Abstract
Microglia-mediated inflammation is a major contributor to the brain damage in cerebral ischemia and reperfusion (I/R) injury, and N6-Methyladenosine (m6A) has been implicated in cerebral I/R injury. Here, we explored whether m6A modification is associated with microglia-mediated inflammation in cerebral I/R injury and its underlying regulatory mechanism using an in vivo mice model of intraluminal middle cerebral artery occlusion/reperfusion (MCAO/R) and in vitro models of primary isolated microglia and BV2 microglial cells subjected to oxygen-glucose deprivation and reoxygenation (OGD/R) were used. We found microglial m6A modification increased and microglial fat mass and obesity-associated protein (FTO) expression decreased in cerebral I/R injury in vivo and in vitro. Inhibition of m6A modification by intraperitoneal injection of Cycloleucine (Cyc) in vivo or transfection of FTO plasmid in vitro significantly alleviated brain injury and microglia-mediated inflammatory response. Through Methylated RNA immunoprecipitation sequencing (MeRIP-Seq), RNA sequencing (RNA-Seq) and western blotting, we found that m6A modification promoted cerebral I/R-induced microglial inflammation via increasing cGAS mRNA stability to aggravate Sting/NF-κB signaling. In conclusion, this study deepens our understanding on the relationship of m6A modification and microglia-mediated inflammation in cerebral I/R injury, and insights a novel m6A-based therapeutic for inhibiting inflammatory response against ischemic stroke.
Collapse
Affiliation(s)
- Zhiyong Yu
- School of Biomedical and Pharmaceutical sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Linbo Zheng
- Department of Traditional Chinese Medicine, Guangdong Second Provincial General Hospital, Guangzhou 510310, China; School of Biomedical and Pharmaceutical sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Yan Geng
- School of Biomedical and Pharmaceutical sciences, Guangdong University of Technology, Guangzhou 510006, China; School of Biomedical and Pharmaceutical sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Yuting Zhang
- School of Biomedical and Pharmaceutical sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Yupeng Wang
- School of Biomedical and Pharmaceutical sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Guoxing You
- School of Biomedical and Pharmaceutical sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Mingsheng Cai
- State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital, Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology; Department of Pathogenic Biology and Immunology, Sino-French Hoffmann Institute, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou 510260, Guangdong, China
| | - Meili Li
- State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital, Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology; Department of Pathogenic Biology and Immunology, Sino-French Hoffmann Institute, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou 510260, Guangdong, China.
| | - Xiao Cheng
- State Key Laboratory of Dampness Syndrome of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangdong, China; Provincial Key Laboratory of Research on Emergency in TCM, Guangzhou, China; Department of Neurology, Guangdong Provincial Hospital of Traditional Chinese Medicine, Guangzhou 510120, China.
| | - Jie Zan
- School of Biomedical and Pharmaceutical sciences, Guangdong University of Technology, Guangzhou 510006, China; Department of Traditional Chinese Medicine, Guangdong Second Provincial General Hospital, Guangzhou 510310, China.
| |
Collapse
|
8
|
Yang K, Bao T, Zeng J, Wang S, Yuan X, Xiang W, Xu H, Zeng L, Ge J. Research progress on pyroptosis-mediated immune-inflammatory response in ischemic stroke and the role of natural plant components as regulator of pyroptosis: A review. Biomed Pharmacother 2023; 157:113999. [PMID: 36455455 DOI: 10.1016/j.biopha.2022.113999] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 11/06/2022] [Accepted: 11/09/2022] [Indexed: 11/29/2022] Open
Abstract
Ischemic stroke (IS) is one of the leading causes of death and disability. Its pathogenesis is not completely clear, and inflammatory cascade is one of its main pathological processes. The current clinical practice of IS is to restore the blood supply to the ischemic area after IS as soon as possible through thrombolytic therapy to protect the vitality and function of neurons. However, blood reperfusion further accelerates ischemic damage and cause ischemia-reperfusion injury. The pathological process of cerebral ischemia-reperfusion injury involves multiple mechanisms, and the exact mechanism has not been fully elucidated. Pyroptosis, a newly discovered form of inflammatory programmed cell death, plays an important role in the initiation and progression of inflammation. It is a pro-inflammatory programmed death mediated by caspase Caspase-1/4/5/11, which can lead to cell swelling and rupture, release inflammatory factors IL-1β and IL-18, and induce an inflammatory cascade. Recent studies have shown that pyroptosis and its mediated inflammatory response are important factors in aggravating ischemic brain injury, and inhibition of pyroptosis may alleviate the ischemic brain injury. Furthermore, studies have found that natural plant components may have a regulatory effect on pyroptosis. Therefore, this review not only summarizes the molecular mechanism of pyroptosis and its role in ischemic stroke, but also the role of natural plant components as regulator of pyroptosis, in order to provide reference information on pyroptosis for the treatment of IS in the future.
Collapse
Affiliation(s)
- Kailin Yang
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, Hunan Province, China.
| | - Tingting Bao
- Department of Endocrinology, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Jinsong Zeng
- The First Hospital of Hunan University of Chinese Medicine, Changsha, Hunan Province, China
| | - Shanshan Wang
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, Hunan Province, China
| | - Xiao Yuan
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, Hunan Province, China
| | - Wang Xiang
- Department of Rheumatology, The First People's Hospital Changde City, Changde City, Hunan Province, China
| | - Hao Xu
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, Hunan Province, China
| | - Liuting Zeng
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, Hunan Province, China.
| | - Jinwen Ge
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, Hunan Province, China; Hunan Academy of Chinese Medicine, Changsha, Hunan Province, China.
| |
Collapse
|
9
|
Meng C, Chen S, He Q, Tan J, Wu J, Zhao J. IKZF3 modulates cerebral ischemia/reperfusion injury by inhibiting neuroinflammation. Int Immunopharmacol 2023; 114:109480. [PMID: 36525791 DOI: 10.1016/j.intimp.2022.109480] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/15/2022] [Accepted: 11/16/2022] [Indexed: 12/23/2022]
Abstract
Neuroinflammation is a key mediator to the pathogenic cascades induced by cerebral ischemia-reperfusion (I/R) injury. IKZF3, a key zinc finger transcription factor in the Ikaros family, has already been shown to modulate a wide range of cell functions and the production of inflammatory mediators. However, the effects of IKZF3 on inflammation and the potential mechanism after cerebral I/R injury remain unclear. In this study, we evaluated the effect of IKZF3 on HT-22 cells under oxygen-glucose deprivation and reoxygenation (OGD/R) in vitro and in mice with MACO in vivo. We found that IKZF3 expression peaked at 12 h after MCAO and OGD/R, and there was high expression of IKZF3 in brain tissues and HT-22 cells. IKZF3 knockdown exacerbated the damage by OGD-induced HT-22 cells injury and MCAO-induced brain injury in mice by regulating the production of inflammatory factors, which promoted the phosphorylation and nuclear transfer of NF-ĸB and may bind with NF-ĸB-p65 in vivo and in vitro. Our results suggested that IKZF3 may provide a new target in improve neurological recovery and reducing neuroinflammation after cerebral I/R injury.
Collapse
Affiliation(s)
- Changchang Meng
- Department of Pathophysiology, Chongqing Medical University, Chongqing 400016, China
| | - Shiyu Chen
- Department of Pathology, Chongqing Medical University, Chongqing 400016, China
| | - Qi He
- Department of Pathophysiology, Chongqing Medical University, Chongqing 400016, China
| | - Junyi Tan
- Department of Pathophysiology, Chongqing Medical University, Chongqing 400016, China
| | - Jingxian Wu
- Department of Pathology, Chongqing Medical University, Chongqing 400016, China; Institute of Neuroscience, Chongqing Medical University, Chongqing 400016, China.
| | - Jing Zhao
- Department of Pathophysiology, Chongqing Medical University, Chongqing 400016, China; Institute of Neuroscience, Chongqing Medical University, Chongqing 400016, China.
| |
Collapse
|
10
|
Shu J, Yang L, Wei W, Zhang L. Identification of programmed cell death-related gene signature and associated regulatory axis in cerebral ischemia/reperfusion injury. Front Genet 2022; 13:934154. [PMID: 35991562 PMCID: PMC9385974 DOI: 10.3389/fgene.2022.934154] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 07/06/2022] [Indexed: 11/13/2022] Open
Abstract
Background: Numerous studies have suggested that programmed cell death (PCD) pathways play vital roles in cerebral ischemia/reperfusion (I/R) injury. However, the specific mechanisms underlying cell death during cerebral I/R injury have yet to be completely clarified. There is thus a need to identify the PCD-related gene signatures and the associated regulatory axes in cerebral I/R injury, which should provide novel therapeutic targets against cerebral I/R injury. Methods: We analyzed transcriptome signatures of brain tissue samples from mice subjected to middle cerebral artery occlusion/reperfusion (MCAO/R) and matched controls, and identified differentially expressed genes related to the three types of PCD(apoptosis, pyroptosis, and necroptosis). We next performed functional enrichment analysis and constructed PCD-related competing endogenous RNA (ceRNA) regulatory networks. We also conducted hub gene analysis to identify hub nodes and key regulatory axes. Results: Fifteen PCD-related genes were identified. Functional enrichment analysis showed that they were particularly associated with corresponding PCD-related biological processes, inflammatory response, and reactive oxygen species metabolic processes. The apoptosis-related ceRNA regulatory network was constructed, which included 24 long noncoding RNAs (lncRNAs), 41 microRNAs (miRNAs), and 4 messenger RNAs (mRNAs); the necroptosis-related ceRNA regulatory network included 16 lncRNAs, 20 miRNAs, and 6 mRNAs; and the pyroptosis-related ceRNA regulatory network included 15 lncRNAs, 18 miRNAs, and 6 mRNAs. Hub gene analysis identified hub nodes in each PCD-related ceRNA regulatory network and seven key regulatory axes in total, namely, lncRNA Malat1/miR-181a-5p/Mapt, lncRNA Malat1/miR-181b-5p/Mapt, lncRNA Neat1/miR-181a-5p/Mapt, and lncRNA Neat1/miR-181b-5p/Mapt for the apoptosis-related ceRNA regulatory network; lncRNA Neat1/miR-181a-5p/Tnf for the necroptosis-related ceRNA regulatory network; lncRNA Malat1/miR-181c-5p/Tnf for the pyroptosis-related ceRNA regulatory network; and lncRNAMalat1/miR-181a-5p for both necroptosis-related and pyroptosis-related ceRNA regulatory networks. Conclusion: The results of this study supported the hypothesis that these PCD pathways (apoptosis, necroptosis, pyroptosis, and PANoptosis) and crosstalk among them might be involved in ischemic stroke and that the key nodes and regulatory axes identified in this study might play vital roles in regulating the above processes. This may offer new insights into the potential mechanisms underlying cell death during cerebral I/R injury and provide new therapeutic targets for neuroprotection.
Collapse
Affiliation(s)
| | | | - Wenshi Wei
- *Correspondence: Wenshi Wei, ; Li Zhang,
| | - Li Zhang
- *Correspondence: Wenshi Wei, ; Li Zhang,
| |
Collapse
|
11
|
Ye X, Song G, Huang S, Liang Q, Fang Y, Lian L, Zhu S. Caspase-1: A Promising Target for Preserving Blood–Brain Barrier Integrity in Acute Stroke. Front Mol Neurosci 2022; 15:856372. [PMID: 35370546 PMCID: PMC8971909 DOI: 10.3389/fnmol.2022.856372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 02/18/2022] [Indexed: 12/24/2022] Open
Abstract
The blood–brain barrier (BBB) acts as a physical and biochemical barrier that plays a fundamental role in regulating the blood-to-brain influx of endogenous and exogenous components and maintaining the homeostatic microenvironment of the central nervous system (CNS). Acute stroke leads to BBB disruption, blood substances extravasation into the brain parenchyma, and the consequence of brain edema formation with neurological impairment afterward. Caspase-1, one of the evolutionary conserved families of cysteine proteases, which is upregulated in acute stroke, mainly mediates pyroptosis and compromises BBB integrity via lytic cellular death and inflammatory cytokines release. Nowadays, targeting caspase-1 has been proven to be effective in decreasing the occurrence of hemorrhagic transformation (HT) and in attenuating brain edema and secondary damages during acute stroke. However, the underlying interactions among caspase-1, BBB, and stroke still remain ill-defined. Hence, in this review, we are concerned about the roles of caspase-1 activation and its associated mechanisms in stroke-induced BBB damage, aiming at providing insights into the significance of caspase-1 inhibition on stroke treatment in the near future.
Collapse
|
12
|
Song J, He K, Yang L, Shen J. Sevoflurane protects mice from cerebral ischemic injury by regulating microRNA-203-3p/HDAC4/Bcl-2 axis. Eur J Neurosci 2022; 55:1695-1708. [PMID: 35141965 DOI: 10.1111/ejn.15622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 01/25/2022] [Accepted: 01/27/2022] [Indexed: 11/29/2022]
Abstract
Sevoflurane (Sevo) is neuroprotective in ischemic injury, but its specific mechanism in the disease from microRNA-203-3p/histone deacetylases 4/B-cell lymphoma 2 (miR-203-3p/HDAC4/Bcl-2) axis asks for a comprehensive explanation. A middle cerebral artery occlusion (MCAO) mouse model was established by nylon suture method. miR-203-3p and HDAC4 expression was measured in mouse brain tissues. The MCAO mice were exposed to Sevo or injected with miR-203-3p- or HDAC4-related plasmids. In response to Sevo treatment or plasmid interference, neurological function, brain pathology, neuronal apoptosis and inflammation were determined. The interactions of miR-203-3p and HDAC4, and HDAC4 and Bcl-2 were verified. MCAO mice presented down-regulated miR-203-3p and up-regulated HDAC4. Sevo improved neurological function, brain pathological damage and reduced neuronal apoptosis and inflammation in MCAO mice, while overexpressing miR-203-3p further enhanced those effects. HDAC4 overexpression antagonized the impacts of miR-203-3p up-regulation on MCAO mice. The targeting relation existed between miR-203-3p and HDAC4, as well as between HDAC4 and Bcl-2. It is clearly elucidated that miR-203-3p enhances the protective effects of Sevo on MCAO mice through elevating Bcl-2 and down-regulating HDAC4, potentially and clinically offering an effective treatment method with Sevo for cerebral ischemic injury.
Collapse
Affiliation(s)
- Jie Song
- Department of Anesthesiology, Jiangxi Maternal and Child Health Hospital, Nanchang, Jiangxi, China
| | - Ke He
- Department of Anesthesiology, Huangshi Central Hospital, Affiliated Hospital of Hubei Polytechnic University, Edong Healthcare Group, Huangshi, Hubei, China
| | - Longqiu Yang
- Department of Anesthesiology, Huangshi Central Hospital, Affiliated Hospital of Hubei Polytechnic University, Edong Healthcare Group, Huangshi, Hubei, China.,Medical College, Wuhan University of Science and Technology, Wuhan, Hubei, China
| | - Jun Shen
- Department of Anesthesiology, Huangshi Central Hospital, Affiliated Hospital of Hubei Polytechnic University, Edong Healthcare Group, Huangshi, Hubei, China.,Medical College, Wuhan University of Science and Technology, Wuhan, Hubei, China
| |
Collapse
|
13
|
The pivotal role of the NLRC4 inflammasome in neuroinflammation after intracerebral hemorrhage in rats. Exp Mol Med 2021; 53:1807-1818. [PMID: 34848837 PMCID: PMC8639719 DOI: 10.1038/s12276-021-00702-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 09/24/2021] [Accepted: 09/28/2021] [Indexed: 11/30/2022] Open
Abstract
The NLRC4 inflammasome, a member of the nucleotide-binding and oligomerization domain-like receptor (NLR) family, amplifies inflammation by facilitating the processing of caspase-1, interleukin (IL)-1β, and IL-18. We explored whether NLRC4 knockdown alleviated inflammatory injury following intracerebral hemorrhage (ICH). Furthermore, we investigated whether NLRC4 inflammasome activation can be adjusted by the regulator of G protein signaling 2/leucine-rich repeat kinase-2 pathway. Fifty microliters of arterial blood was drawn and injected into the basal ganglion to simulate the ICH model. NLRC4 small interfering RNAs (siRNAs) were utilized to knockdown NLRC4. An LRRK2 inhibitor (GNE7915) was injected into the abdominal cavity. Short hairpin (sh) RNA lentiviruses and lentiviruses containing RGS2 were designed and applied to knockdown and promote RGS2 expression. Neurological functions, brain edema, Western blot, enzyme-linked immunosorbent, hematoxylin and eosin staining, Nissl staining, immunoprecipitation, immunofluorescence assay and Evans blue dye extravasation and autofluorescence assay were evaluated. It was shown that the NLRC4 inflammasome was activated following ICH injury. NLRC4 knockdown extenuated neuronal death, damage to the blood-brain barrier, brain edema and neurological deficiency 3 days after ICH. NLRC4 knockdown reduced myeloperoxidase (MPO) cells as well as tumor necrosis factor (TNF)-α, interleukin (IL)-6, IL-1β and IL-18 following ICH. GNE7915 reduced pNLRC4 and NLRC4 inflammasome activation. RGS2 suppressed the interaction of LRRK2 and NLRC4 and NLRC4 inflammasome activation by regulating pLRRK2. Our study demonstrated that the NLRC4 inflammasome may aggravate the inflammatory injury induced by ICH and that RGS2/LRRK2 may relieve inflammatory injury by restraining NLRC4 inflammasome activation.
Collapse
|
14
|
Yamasaki T, Hatori A, Zhang Y, Mori W, Kurihara Y, Ogawa M, Wakizaka H, Rong J, Wang L, Liang S, Zhang MR. Neuroprotective effects of minocycline and KML29, a potent inhibitor of monoacylglycerol lipase, in an experimental stroke model: a small-animal positron emission tomography study. Am J Cancer Res 2021; 11:9492-9502. [PMID: 34646382 PMCID: PMC8490517 DOI: 10.7150/thno.64320] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 09/01/2021] [Indexed: 11/14/2022] Open
Abstract
Hypoxia caused by ischemia induces acidosis and neuroexcitotoxicity, resulting in neuronal death in the central nervous system (CNS). Monoacylglycerol lipase (MAGL) is a modulator of 2-arachidonoylglycerol (2-AG), which is involved in retrograde inhibition of glutamate release in the endocannabinoid system. In the present study, we used positron emission tomography (PET) to monitor MAGL-positive neurons and neuroinflammation in the brains of ischemic rats. Additionally, we performed PET imaging to evaluate the neuroprotective effects of an MAGL inhibitor in an ischemic injury model. Methods: Ischemic-injury rat models were induced by intraluminal right middle cerebral artery occlusion (MCAO). PET studies of the brains of the ischemic rats were performed at several experimental time points (pre-occlusion, days 2, 4, and 7 after the MCAO surgery) using [11C]SAR127303 for MAGL and [18F]FEBMP for 18 kDa translocator protein (TSPO, a hall-mark of neuroinflammation). Medication using minocycline (a well-known neuroprotective agent) or KML29 (a potent MAGL inhibitor) was given immediately after the MCAO surgery and then daily over the subsequent three days. Results: PET imaging of the ischemic rats using [11C]SAR127303 showed an acute decline of radioactive accumulation in the ipsilateral side at two days after MCAO surgery (ratio of the area under the curve between the ipsilateral and contralateral sides: 0.49 ± 0.04 in the cortex and 0.73 ± 0.02 in the striatum). PET imaging with [18F]FEBMP, however, showed a moderate increase in accumulation of radioactivity in the ipsilateral hemisphere on day 2 (1.36 ± 0.11), and further increases on day 4 (1.72 ± 0.15) and day 7 (1.99 ± 0.06). Treatment with minocycline or KML29 eased the decline in radioactive accumulation of [11C]SAR127303 for MAGL (minocycline-treated group: 0.82 ± 0.06 in the cortex and 0.81 ± 0.05 in the striatum; KML29-treated group: 0.72 ± 0.07 in the cortex and 0.88 ± 0.04 in the striatum) and increased uptake of [18F]FEBMP for TSPO (minocycline-treated group: 1.52 ± 0.21 in the cortex and 1.56 ± 0.11 in the striatum; KML29-treated group: 1.63 ± 0.09 in the cortex and 1.50 ± 0.17 in the striatum). In MCAO rats, minocycline treatment showed a neuroprotective effect in the sensorimotor cortex suffering from severe hypoxic injury, whereas KML29 treatment saved neurons in the striatum, including bundles of myelinated axons. Conclusions: PET imaging allowed visualization of the different neuroprotective effects of minocycline and KML29, and indicated that combination pharmacotherapy using these drugs may be an effective therapy in acute ischemia.
Collapse
|
15
|
Li C, Chai A, Gao Y, Qi X, Zheng X. Combination of tetrandrine and 3-n-butylphthalide protects against cerebral ischemia-reperfusion injury via ATF2/TLR4 pathway. Immunopharmacol Immunotoxicol 2021; 43:749-757. [PMID: 34591732 DOI: 10.1080/08923973.2021.1979036] [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] [Indexed: 10/20/2022]
Abstract
OBJECTIVE Cerebral infarction (CI) is the mayor reason of death in China. Reperfusion is the only immediate treatment for acute cerebral infarction. However, blood reperfusion recovery may cause ischemia-reperfusion (I/R) injuries. The purpose of this study was to investigate the effects of Tetrandrine (TTD) and 3-n-Butylphthalide (NBP) on cerebral I/R injury. MATERIALS AND METHODS I/R was used to establish CI model in vivo. TTD was performed to analyze cerebral infarction volume. OGD was applied to establish CI model in vitro. Flow cytometry and TUNEL assays were utilized to determine the cell death. ELISA was conducted to determine the release of cytokines. mRNA and protein expressions were detected using qRT-PCR and western blot. RESULTS We found that NBP + TTD treatment significantly reduced cerebral infarction volume and inhibited the death of neurons in vivo. Moreover, NBP + TTD treatment suppressed the apoptosis and inflammatory response of neurons in vitro. Additionally, NBP + TTD suppressed the expression of activator transcription factor 2 (ATF2). However, overexpression of ATF2 contributed to the degeneration of neurons. Moreover, ATF2 transcriptionally activated Toll-like receptor 4 (TLR4). NBP + TTD inactivated ATF2/TLR4 signaling. CONCLUSIONS Taken together, TTD combined with NBP protected against cerebral infarction by inhibiting the inflammatory response and neuronal cell apoptosis via inactivating ATF2/TLR4 signaling pathways. This may provide an alternative for I/R injury.
Collapse
Affiliation(s)
- Cunfang Li
- Department of Pharmacy, Shijiazhuang People's Hospital, Shijiazhuang, China
| | - Aijun Chai
- Department of Pharmacy, Shijiazhuang People's Hospital, Shijiazhuang, China
| | - Yongchao Gao
- Department of Pharmacy, Shijiazhuang People's Hospital, Shijiazhuang, China
| | - Xuan Qi
- Department of Pharmacy, Shijiazhuang People's Hospital, Shijiazhuang, China
| | - Xuguang Zheng
- Department of Pharmacy, The First Hospital of Hebei Medical University, Shijiazhuang, China
| |
Collapse
|
16
|
Liu W, Shao C, Zang C, Sun J, Xu M, Wang Y. Protective effects of dexmedetomidine on cerebral ischemia/reperfusion injury via the microRNA-214/ROCK1/NF-κB axis. BMC Anesthesiol 2021; 21:203. [PMID: 34399695 PMCID: PMC8365892 DOI: 10.1186/s12871-021-01423-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 07/27/2021] [Indexed: 02/27/2023] Open
Abstract
BACKGROUND Cerebral ischemia/reperfusion injury (CIRI) is a complication of surgical procedure associated with high mortality. The protective effect of dexmedetomidine (DEX) on CIRI has been explored in previous works, yet the underlying molecular mechanism remains unclear. Our study explored the protective effect of DEX and its regulatory mechanism on CIRI. METHODS A CIRI rat model was established using middle cerebral artery occlusion (MCAO). Neurological deficit scores for rats received MCAO modeling or DEX treatment were measured. Cerebral infarction area of rats was detected by TTC staining, while damage of neurons in hippocampal regions of rats was determined by hematoxylin-eosin (HE) staining. Apoptosis rate of neurons in hippocampal regions was examined by TUNEL staining. The dual-luciferase assay was performed to detect the binding of microRNA-214 (miR-214) to Rho-associated kinase 1 (ROCK1). RESULTS DEX treatment significantly reduced infarction area of MCAO rats and elevated miR-214 expression. Injection of miR-214 inhibitor attenuated the effect of DEX in MCAO rats by increasing the area of cerebral infarction in rats and apoptosis rate of hippocampal neurons. ROCK1 was targeted and negatively regulated by miR-214. The overexpression of ROCK1 led to activation of NF-κB to aggravate CIRI. CONCLUSION Therapeutic effects of DEX on CIRI was elicited by overexpressing miR-214 and impairing ROCK1 expression and NF-κB activation. Our finding might provide novel insights into the molecular mechanism of DEX in rats with CIRI.
Collapse
Affiliation(s)
- Wenyi Liu
- Department of Anesthesiology|, The Affiliated Hospital of Qingdao University, No. 59, Haier Road, Laoshan District, Qingdao, 266003, Shandong, PR China
| | - Cuihua Shao
- Department of Obstetrics, The Affiliated Hospital of Qingdao University, Qingdao, 266003, Shandong, PR China
| | - Chuanshan Zang
- Department of Otorhinolaryngology Head and Neck Surgery, The Affiliated Hospital of Qingdao University, Qingdao, 266003, Shandong, PR China
| | - Jian Sun
- Department of Anesthesiology|, The Affiliated Hospital of Qingdao University, No. 59, Haier Road, Laoshan District, Qingdao, 266003, Shandong, PR China
| | - Min Xu
- Department of Orthopaedics, The Affiliated Hospital of Qingdao University, Qingdao, 266003, Shandong, PR China
| | - Yuna Wang
- Department of Anesthesiology|, The Affiliated Hospital of Qingdao University, No. 59, Haier Road, Laoshan District, Qingdao, 266003, Shandong, PR China.
| |
Collapse
|
17
|
Liu Y, Li YP, Xiao LM, Chen LK, Zheng SY, Zeng EM, Xu CH. Extracellular vesicles derived from M2 microglia reduce ischemic brain injury through microRNA-135a-5p/TXNIP/NLRP3 axis. J Transl Med 2021; 101:837-850. [PMID: 33875790 DOI: 10.1038/s41374-021-00545-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 01/19/2021] [Accepted: 01/21/2021] [Indexed: 12/22/2022] Open
Abstract
Accumulating evidences have suggested that extracellular vesicles (EVs) are crucial players in the pathogenesis of ischemic brain injury. This study was designed to explore the specific functions of M2 phenotype microglia-derived EVs in ischemic brain injury progression. The expression of microRNA-135a-5p (miR-135a-5p) in M2 microglia-derived EVs was determined by reverse transcription-quantitative polymerase chain reaction (RT-qPCR), followed by the identification of expression relationship among miR-135a-5p, thioredoxin-interacting protein (TXNIP), and nod-like receptor protein 3 (NLRP3) by dual luciferase reporter gene assay. After construction of an oxygen-glucose deprivation/reperfusion (OGD/R) cell model, the effects of miR-135a-5p on the biological characteristics of HT-22 cells were assessed by cell counting kit 8 (CCK-8) assay and flow cytometry. Finally, a mouse model of transient middle cerebral artery occlusion (tMCAO) was established and cerebral infarction volume was determined by triphenyltetrazolium chloride (TTC) staining and the expression of IL-18 and IL-1β in the brain tissue was determined by enzyme-linked immunosorbent assay (ELISA). We found that M2 microglia-derived EVs had high expression of miR-135a-5p, and that miR-135a-5p in M2 microglia-derived EVs negatively regulated the expression of NLRP3 via TXNIP. Overexpression of miR-135a-5p promoted the proliferation but inhibited the apoptosis of neuronal cells, and inhibited the expression of autophagy-related proteins. M2 microglia-derived EVs delivered miR-135a-5p into neuronal cells to inhibit TXNIP expression, which further inhibited the activation of NLRP3 inflammasome, thereby reducing neuronal autophagy and ischemic brain injury. Hence, M2 microglia-derived EVs are novel therapeutic targets for ischemic brain injury treatment.
Collapse
Affiliation(s)
- Yue Liu
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, PR China
| | - You-Ping Li
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, PR China
| | - Li-Min Xiao
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, PR China
| | - Li-Ke Chen
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, PR China
| | - Su-Yue Zheng
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, PR China
| | - Er-Ming Zeng
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, PR China
| | - Chun-Hua Xu
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, PR China.
| |
Collapse
|
18
|
Zhang L, Jiao C, Liu L, Wang A, Tang L, Ren Y, Huang P, Xu J, Mao D, Liu L. NLRC5: A Potential Target for Central Nervous System Disorders. Front Immunol 2021; 12:704989. [PMID: 34220868 PMCID: PMC8250149 DOI: 10.3389/fimmu.2021.704989] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 06/07/2021] [Indexed: 12/22/2022] Open
Abstract
Nucleotide oligomerization domain-like receptors (NLRs), a class of pattern recognition receptors, participate in the host’s first line of defense against invading pathogenic microorganisms. NLR family caspase recruitment domain containing 5 (NLRC5) is the largest member of the NLR family and has been shown to play an important role in inflammatory processes, angiogenesis, immunity, and apoptosis by regulating the nuclear factor-κB, type I interferon, and inflammasome signaling pathways, as well as the expression of major histocompatibility complex I genes. Recent studies have found that NLRC5 is also associated with neuronal development and central nervous system (CNS) diseases, such as CNS infection, cerebral ischemia/reperfusion injury, glioma, multiple sclerosis, and epilepsy. This review summarizes the research progress in the structure, expression, and biological characteristics of NLRC5 and its relationship with the CNS.
Collapse
Affiliation(s)
- Lu Zhang
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Children's Brain Development and Brain Injury Research Office, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Cui Jiao
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Children's Brain Development and Brain Injury Research Office, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Lingjuan Liu
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Children's Brain Development and Brain Injury Research Office, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Aiping Wang
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Children's Brain Development and Brain Injury Research Office, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Li Tang
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Children's Brain Development and Brain Injury Research Office, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Yi Ren
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Children's Brain Development and Brain Injury Research Office, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Peng Huang
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Children's Brain Development and Brain Injury Research Office, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Jie Xu
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Children's Brain Development and Brain Injury Research Office, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Dingan Mao
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Children's Brain Development and Brain Injury Research Office, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Liqun Liu
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China.,Children's Brain Development and Brain Injury Research Office, The Second Xiangya Hospital, Central South University, Changsha, China
| |
Collapse
|
19
|
Huang X, Gan H, Tan J, Wang T, Zhao J, Zhao Y. BRCC3 promotes activation of the NLRP6 inflammasome following cerebral ischemia/reperfusion (I/R) injury in rats. Neurosci Lett 2021; 756:135954. [PMID: 33979701 DOI: 10.1016/j.neulet.2021.135954] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/01/2021] [Accepted: 05/07/2021] [Indexed: 12/30/2022]
Abstract
NOD-like receptor family pyrin domain containing 6 (NLRP6), a novel member of the NLR family, has been confirmed to have an inflammasome-dependent proinflammatory effect in cerebral ischemia/reperfusion injury. NLRP6 assembles a multimeric inflammasome complex comprising the adaptor ASC and the effector pro-caspase-1 to mediate the activation of caspase-1. The molecular mechanism regulating activation of the NLRP6 inflammasome remains unclear. Previous studies have shown that BRCA1-BRCA2-containing complex subunit 3 (BRCC3), a JAMM domain-containing Zn2+ metalloprotease deubiquitinating enzyme, participates in a variety of cellular activities. In this study, we found that BRCC3 expression was increased in the middle cerebral artery occlusion (MCAO) model. BRCC3 siRNA could reduce nerve damage and inflammation. Interestingly, the result of co-immunoprecipitation showed that the interaction between BRCC3 and NLRP6 was enhanced after model, and the result of immunofluorescence showed that the co-localization of BRCC3 and NLRP6 was increased. At the same time, the expression of NLRP6, cleavated-caspase-1 and IL-1β was decreased after BRCC3 interference. These results illustrate a regulatory mechanism involving the BRCC3-NLRP6 pathway and highlight NLRP6 as a potential therapeutic target for inflammatory diseases.
Collapse
Affiliation(s)
- Xiaohuan Huang
- Department of Pathology, Chongqing Medical University, Chongqing, CQ, 400016, China; Department of Pathology, Chongqing Three Gorges Medical College, Wanzhou, WZ, 404120, China
| | - Hui Gan
- Department of Pathophysiology, Chongqing Medical University, Chongqing, CQ, 400016, China
| | - Junyi Tan
- Department of Pathophysiology, Chongqing Medical University, Chongqing, CQ, 400016, China
| | - Tingting Wang
- Department of Pathology, Chongqing Medical University, Chongqing, CQ, 400016, China
| | - Jing Zhao
- Department of Pathophysiology, Chongqing Medical University, Chongqing, CQ, 400016, China.
| | - Yong Zhao
- Department of Pathology, Chongqing Medical University, Chongqing, CQ, 400016, China.
| |
Collapse
|
20
|
Venuprasad K, Theiss AL. NLRP6 in host defense and intestinal inflammation. Cell Rep 2021; 35:109043. [PMID: 33910012 PMCID: PMC8106960 DOI: 10.1016/j.celrep.2021.109043] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 01/21/2021] [Accepted: 04/06/2021] [Indexed: 02/06/2023] Open
Abstract
NLRP6 is a member of the NLR (nucleotide-oligomerization domain-like receptor) family of proteins that recognize pathogen-derived factors and damage-associated molecular patterns in the cytosol. The function of NLRP6 has been attributed to the maintenance of epithelial integrity and host defense against microbial infections. Under some physiological conditions, NLRP6 forms a complex with ASC and caspase-1 or caspase-11 to form an inflammasome complex cleaving pro-interleukin-1β (IL-1β) and IL-18 into their biologically active forms. Here, we summarize recent advances in the understanding of the mechanisms of activation of the NLRP6 inflammasome and discuss its relevance to human disease.
Collapse
Affiliation(s)
- K Venuprasad
- Department of Internal Medicine, UT Southwestern Medical Center, Dallas, TX 75390, USA; Department of Immunology, UT Southwestern Medical Center, Dallas, TX 75390, USA; Harold C. Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
| | - Arianne L Theiss
- Division of Gastroenterology and Hepatology, School of Medicine at the Anschutz Medical Campus, University of Colorado, Aurora, CO 80045, USA
| |
Collapse
|
21
|
Wei L, Peng Y, Yang XJ, Zhou P. Knockdown of long non-coding RNA RMRP protects cerebral ischemia-reperfusion injury via the microRNA-613/ATG3 axis and the JAK2/STAT3 pathway. Kaohsiung J Med Sci 2021; 37:468-478. [PMID: 33560543 DOI: 10.1002/kjm2.12362] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 09/29/2020] [Accepted: 12/27/2020] [Indexed: 12/17/2022] Open
Abstract
Cerebral ischemia-reperfusion (I/R) injury can induce the mitophagy of neurons in the ischemic brain. Long non-coding RNAs (lncRNAs) play an important role in the pathogenesis of various injuries, especially in cerebral I/R injury. The purpose of this study is to investigate the molecular mechanism of lncRNA RNA component of mitochondrial RNA processing endoribonuclease (RMRP) in cerebral I/R injury. The middle cerebral artery occlusion (MCAO) mouse model was established. Neurological deficit score, pathological structure, infarcted area, neuron number, cell apoptosis, and coagulation ability of MCAO mice were evaluated. The expressions of RMRP, microRNA (miR)-613, and ATG3 in MCAO mice were detected. The binding relationships among miR-613, RMRP, and ATG3 were predicted and verified. Neuro 2A (N2a) cells were treated with oxygen-glucose deprivation/reperfusion (OGD/R) to simulate I/R injury. Cell viability and apoptosis assays were performed. The effects of miR-613, ATG3, and RMRP on I/R injury were verified by functional rescue experiments. JAK2/STAT3 phosphorylation level was detected. We found significantly upregulated RMRP and ATG3, and downregulated miR-613 expressions in MCAO mice. RMRP could escalate ATG3 mRNA expression through miR-613. RMRP knockdown promoted viability and inhibited apoptosis of OGD/R-treated N2a cells, which could be reversed by miR-613 inhibition or ATG3 overexpression. RMRP overexpression inhibited the activation of JAK2/STAT3 signaling pathway. We demonstrated that lncRNA RMRP competitively bound to miR-613, leading to the increase of ATG3 expression and the inhibition the JAK2/STAT3 pathway, thus promoting cerebral I/R injury in mice.
Collapse
Affiliation(s)
- Li Wei
- Department of Blood Transfusion, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu, China
| | - Ya Peng
- Department of Neurosurgery, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu, China
| | - Xiao-Jun Yang
- Department of Blood Transfusion, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu, China
| | - Peng Zhou
- Department of Neurosurgery, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu, China
| |
Collapse
|
22
|
Zheng D, Kern L, Elinav E. The NLRP6 inflammasome. Immunology 2020; 162:281-289. [PMID: 33314083 PMCID: PMC7884648 DOI: 10.1111/imm.13293] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 10/29/2020] [Accepted: 11/10/2020] [Indexed: 12/30/2022] Open
Abstract
The NOD‐like receptor family pyrin domain containing 6 (NLRP6), a member of the NOD‐like receptor (NLR) family, acts as a cytosolic innate immune sensor that recognizes microbe‐associated molecular patterns. In some circumstances upon activation, NLRP6 recruits the adaptor apoptosis‐associated speck‐like protein (ASC) and the inflammatory caspase‐1 or caspase‐11 to form an inflammasome, which mediates the maturation and secretion of the pro‐inflammatory cytokines IL‐18 and IL‐1β. In other contexts, NLRP6 can exert its function in an inflammasome‐independent manner. Tight regulation of the NLRP6 inflammasome is critical in maintaining tissue homeostasis, while improper inflammasome activation may contribute to the development of multiple diseases. In intestinal epithelial cells, the NLRP6 inflammasome is suggested to play a role in regulating gut microbiome composition, goblet cell function and related susceptibility to gastrointestinal inflammatory, infectious and neoplastic diseases. Additionally, NLRP6 may regulate extra‐intestinal diseases. In this review, we summarize current knowledge on the NLRP6 inflammasome and its activation and regulation patterns, as well as its effector functions contributing to disease modulation. We discuss current challenges in NLRP6 research and future prospects in harnessing its function into potential human interventions.
Collapse
Affiliation(s)
- Danping Zheng
- Immunology Department, Weizmann Institute of Science, Rehovot, Israel.,Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Lara Kern
- Immunology Department, Weizmann Institute of Science, Rehovot, Israel
| | - Eran Elinav
- Immunology Department, Weizmann Institute of Science, Rehovot, Israel.,Cancer-Microbiome Division Deutsches Krebsforschungszentrum (DKFZ), Heidelberg, Germany
| |
Collapse
|
23
|
Ye A, Li W, Zhou L, Ao L, Fang W, Li Y. Targeting pyroptosis to regulate ischemic stroke injury: Molecular mechanisms and preclinical evidences. Brain Res Bull 2020; 165:146-160. [PMID: 33065175 DOI: 10.1016/j.brainresbull.2020.10.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/24/2020] [Accepted: 10/01/2020] [Indexed: 02/07/2023]
Abstract
Stroke is one of the leading causes of death worldwide with limited therapies. After ischemic stroke occurs, a robust sterile inflammatory response happens and lasts for days and determines neurological prognosis. Pyroptosis is an inflammatory programmed cell death characterized by cleavage of pore-forming proteins gasdermins as a result of activating caspases and inflammasomes. It has morphological characteristics of rapid plasma-membrane rupture and release of proinflammatory intracellular contents as well as cytokines. Recent researches implicate pyroptosis involvement in the pathogenesis of ischemic stroke and inhibition of pyroptosis attenuates ischemic brain injury. In this review, we discussed molecular mechanisms of pyroptosis, evidences for pyroptosis involvement in different kinds of the central nervous system cells, as well as potential inhibitors for intervention of pyroptosis. Based on the review, we hypothesize the feasibility of therapeutic strategies targeting pyroptosis in the context of ischemic stroke.
Collapse
Affiliation(s)
- Anqi Ye
- State Key Laboratory of Natural Medicines, School of Basic Medical Sciences and Clinical Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Wanting Li
- State Key Laboratory of Natural Medicines, School of Basic Medical Sciences and Clinical Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Lin Zhou
- State Key Laboratory of Natural Medicines, School of Basic Medical Sciences and Clinical Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Luyao Ao
- State Key Laboratory of Natural Medicines, School of Basic Medical Sciences and Clinical Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China
| | - Weirong Fang
- State Key Laboratory of Natural Medicines, School of Basic Medical Sciences and Clinical Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China.
| | - Yunman Li
- State Key Laboratory of Natural Medicines, School of Basic Medical Sciences and Clinical Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China.
| |
Collapse
|
24
|
Li D, Liu X, Li C, Zhang Y, Guan C, Huang J, Xu Y. Role of promoting inflammation of Krüppel-like factor 6 in acute kidney injury. Ren Fail 2020; 42:693-703. [PMID: 32698645 PMCID: PMC7470120 DOI: 10.1080/0886022x.2020.1793353] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Background Krüppel-like factor 6 (KLF6) is a transcription factor that participate in various pathophysiological processes, but its contribution in ischemia acute kidney injury (AKI) is lacking so far. The study aimed to investigate the expression and the role of KLF6 in kidney ischemia–reperfusion (IR) injury. Method Microarray data were collected from GSE58438 and GSE52004. The rat IR model was established to evaluate the mRNA and protein expression of KLF6 and inflammatory cytokines in serum and kidney tissues. SiRNA-KLF6 was transfected with HK-2 cells, and then a cell-based hypoxia-reoxygenation (HR) model was established. Results Bioinformatics showed KLF6 mRNA in kidney tissue is up-regulated in 3 h after IR in rat kidney, which involved in cell activation, leukocyte activation, and response to hydrogen peroxide after IR. The rat IR model results showed that KLF6 expression was peaking at 6 h, and the expression of pro-inflammatory cytokines MCP-1 and TNF-α was increased both in serum and kidney tissues, while anti-inflammatory cytokine IL-10 was decreased after IR. Furthermore, in vitro results showed that KLF6 knock-down reduced the pro-inflammatory cytokines expression. Conclusion These results suggest that (1) KLF6 might be a novel biomarker for early diagnosis of AKI and (2) KLF6 may play a role in promoting inflammation in AKI.
Collapse
Affiliation(s)
- Dan Li
- Department of Nephrology, The Affiliated Hospital of Qingdao University, Qingdao, China.,Department of Nephrology, Qingdao Central Hospital, Qingdao, China
| | - Xiaoqiang Liu
- Reproductive Medicine Center, Qingdao Women and Children's Hospital, Qingdao, China
| | - Chenyu Li
- Department of Nephrology, The Affiliated Hospital of Qingdao University, Qingdao, China.,Division of Nephrology, Medizinische Klinik und Poliklinik IV, Klinikum der Universität, Munich, Germany
| | - Yue Zhang
- Department of Nephrology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Chen Guan
- Department of Nephrology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Junyan Huang
- Department of Nephrology, Qingdao Central Hospital, Qingdao, China
| | - Yan Xu
- Department of Nephrology, The Affiliated Hospital of Qingdao University, Qingdao, China
| |
Collapse
|
25
|
Mészáros Á, Molnár K, Nógrádi B, Hernádi Z, Nyúl-Tóth Á, Wilhelm I, Krizbai IA. Neurovascular Inflammaging in Health and Disease. Cells 2020; 9:cells9071614. [PMID: 32635451 PMCID: PMC7407516 DOI: 10.3390/cells9071614] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 07/02/2020] [Indexed: 12/19/2022] Open
Abstract
Aging is characterized by a chronic low-grade sterile inflammation dubbed as inflammaging, which in part originates from accumulating cellular debris. These, acting as danger signals with many intrinsic factors such as cytokines, are sensed by a network of pattern recognition receptors and other cognate receptors, leading to the activation of inflammasomes. Due to the inflammasome activity-dependent increase in the levels of pro-inflammatory interleukins (IL-1β, IL-18), inflammation is initiated, resulting in tissue injury in various organs, the brain and the spinal cord included. Similarly, in age-related diseases of the central nervous system (CNS), inflammasome activation is a prominent moment, in which cells of the neurovascular unit occupy a significant position. In this review, we discuss the inflammatory changes in normal aging and summarize the current knowledge on the role of inflammasomes and contributing mechanisms in common CNS diseases, namely Alzheimer’s disease, Parkinson’s disease, amyotrophic lateral sclerosis and stroke, all of which occur more frequently with aging.
Collapse
Affiliation(s)
- Ádám Mészáros
- Institute of Biophysics, Biological Research Centre, 6726 Szeged, Hungary; (Á.M.); (K.M.); (B.N.); (Z.H.); (Á.N.-T.); (I.W.)
- Doctoral School of Biology, University of Szeged, 6726 Szeged, Hungary
| | - Kinga Molnár
- Institute of Biophysics, Biological Research Centre, 6726 Szeged, Hungary; (Á.M.); (K.M.); (B.N.); (Z.H.); (Á.N.-T.); (I.W.)
- Theoretical Medicine Doctoral School, University of Szeged, 6720 Szeged, Hungary
| | - Bernát Nógrádi
- Institute of Biophysics, Biological Research Centre, 6726 Szeged, Hungary; (Á.M.); (K.M.); (B.N.); (Z.H.); (Á.N.-T.); (I.W.)
- Foundation for the Future of Biomedical Sciences in Szeged, Szeged Scientists Academy, 6720 Szeged, Hungary
| | - Zsófia Hernádi
- Institute of Biophysics, Biological Research Centre, 6726 Szeged, Hungary; (Á.M.); (K.M.); (B.N.); (Z.H.); (Á.N.-T.); (I.W.)
- Foundation for the Future of Biomedical Sciences in Szeged, Szeged Scientists Academy, 6720 Szeged, Hungary
| | - Ádám Nyúl-Tóth
- Institute of Biophysics, Biological Research Centre, 6726 Szeged, Hungary; (Á.M.); (K.M.); (B.N.); (Z.H.); (Á.N.-T.); (I.W.)
- Vascular Cognitive Impairment and Neurodegeneration Program, Reynolds Oklahoma Center on Aging/Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Imola Wilhelm
- Institute of Biophysics, Biological Research Centre, 6726 Szeged, Hungary; (Á.M.); (K.M.); (B.N.); (Z.H.); (Á.N.-T.); (I.W.)
- Institute of Life Sciences, Vasile Goldiş Western University of Arad, 310414 Arad, Romania
| | - István A. Krizbai
- Institute of Biophysics, Biological Research Centre, 6726 Szeged, Hungary; (Á.M.); (K.M.); (B.N.); (Z.H.); (Á.N.-T.); (I.W.)
- Institute of Life Sciences, Vasile Goldiş Western University of Arad, 310414 Arad, Romania
- Correspondence: ; Tel.: +36-62-599-794
| |
Collapse
|
26
|
Li L, Yu M, Pang H, Chen L, Liu J, Hou S. NLRC5 protects neurons from oxygen-glucose deprivation-induced injury through activating the Nrf2/HO-1 pathway. J Recept Signal Transduct Res 2020; 41:53-58. [PMID: 32605461 DOI: 10.1080/10799893.2020.1786840] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
NLRC5 is a member of the Nod-like receptor (NLR) family that has been found to be associated with the hepatic ischemia/reperfusion (I/R) injury. However, the role of NLRC5 in cerebral I/R has not been fully understood. The aim of the current study was to evaluate the effects of NLRC5 on primary hippocampal neuronal cells exposed to oxygen-glucose deprivation/reperfusion (OGD/R). Our results showed that the mRNA and protein levels of NLRC5 were significantly decreased in OGD/R-induced neurons. Overexpression of NLRC5 caused significant increase in cell viability, as well as decrease in ROS level. The bax expression was significantly decreased, while bcl-2 expression was increased in NLRC5-overexpressing neurons. Furthermore, increased nuclear factor erythroid 2-related factor 2 (Nrf2) and heme oxygenase-1 (HO-1) expression levels were observed in neurons transfected with pcDNA3.0-NLRC5. The mRNA levels of HO-1, NAD(P)H:quinone oxidoreductase 1 (NQO-1) and glutathione peroxidase 3 (GPx-3) were induced by NLRC5 overexpression in OGD/R-induced hippocampal neurons. Additionally, inhibition of Nrf2/HO-1 pathway abolished the protective effect of NLRC5 on cerebral I/R injury. In conclusion, these results indicated that NLRC5 protected hippocampal neurons from OGD/R-induced injury. The protective effects of NLRC5 were mediated by the Nrf2/HO-1 pathway. Thus, NLRC5 might serve as an effective target for the treatment of cerebral I/R injury.
Collapse
Affiliation(s)
- Linlin Li
- The Third Ward of Nerve Center, Suining Central Hospital, Suining, China
| | - Ming Yu
- The Third Ward of Nerve Center, Suining Central Hospital, Suining, China
| | - Hongbo Pang
- The Third Ward of Nerve Center, Suining Central Hospital, Suining, China
| | - Ling Chen
- Nursing Department, Shaanxi Province Friendship Hospital, Xi'an, China
| | - Junya Liu
- Pharmacy Intravenous Admixture Service, Department of Pharmacy, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Shiqing Hou
- Nursing Department, Shaanxi Province Friendship Hospital, Xi'an, China
| |
Collapse
|
27
|
Wang J, Guo M, Ma R, Wu M, Zhang Y. Tetrandrine alleviates cerebral ischemia/reperfusion injury by suppressing NLRP3 inflammasome activation via Sirt-1. PeerJ 2020; 8:e9042. [PMID: 32419986 PMCID: PMC7211409 DOI: 10.7717/peerj.9042] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 04/01/2020] [Indexed: 12/11/2022] Open
Abstract
Background & Aims Tetrandrine (Tet) has been reported to have anti-inflammatory effects and protect from the ischemic strokes. The NLRP3 inflammasome plays a key role in cerebral ischemia/reperfusion (I/R)-induced inflammatory lesions. However, the molecular mechanisms of Tet related to the progression of cerebral ischemia are still unclear. Therefore, the aim of this study was to investigate the possible effects of Tet on cerebral ischemia and the related mechanisms involved in NLRP3 inflammasome. Methods C57BL/6J mice used as a cerebral I/R injury model underwent middle cerebral artery occlusion (MCAO) for 2 h following reperfusion for 24 h. Tet (30 mg/kg/day, i.p.) was administered for seven days and 30 min before and after MCAO. Their brain tissues were evaluated for NLRP3 inflammasome and Sirtuin-1 (Sirt-1) expression. An intracerebroventricular injection of Sirt-1 siRNA was administered to assess the activation of the NLRP3 inflammasome. Results Tet significantly reduced the neurological deficits, infarction volume, and cerebral water content in MCAO mice. Moreover, it inhibited I/R-induced over expression of NLRP3, cleaved caspase-1, interleukin (IL)-1β, IL-18, and Sirt-1. Sirt-1 knockdown with siRNA greatly blocked the Tet-induced reduction of neurological severity score and infarct volume, and reversed the inhibition of NLRP3 inflammasome activation. Conclusion Our results demonstrate that Tet has benefits for cerebral I/R injury, which are partially related to the suppression of NLRP3 inflammasome activation via upregulating Sirt-1.
Collapse
Affiliation(s)
- Jun Wang
- Department of Cardiology, Zhejiang Xiaoshan Hospital, Hangzhou, Zhejiang Province, China.,Department of Acupuncture, Zhejiang Provincial Integrated Chinese and Western Medicine Hospital, Hangzhou, Zhejiang Province, China
| | - Ming Guo
- Department of Cardiology, Zhejiang Xiaoshan Hospital, Hangzhou, Zhejiang Province, China
| | - Ruojia Ma
- Department of Cardiology, Zhejiang Xiaoshan Hospital, Hangzhou, Zhejiang Province, China
| | - Maolin Wu
- Department of Cardiology, Zhejiang Xiaoshan Hospital, Hangzhou, Zhejiang Province, China
| | - Yamei Zhang
- Department of Cardiology, Zhejiang Xiaoshan Hospital, Hangzhou, Zhejiang Province, China
| |
Collapse
|
28
|
Abstract
NOD-like receptor family pyrin domain containing 6 (NLRP6) is a novel NLR family member, that shows high expression in the intestine and liver (in contrast to NLRP3 in myeloid cells), to regulate inflammation and host defense against microbes. NLRP6 is reported to involved in inflammasome activation, regulation of nuclear factor-κB (NF-κB) and mitogen-activated protein kinase (MAPK) signaling, antiviral interferon (IFN) signaling, mucus secretion, and antimicrobial peptide (AMP) production. Here, we discuss the recent findings as well as debates regarding: how NLRP6 is induced ("signal I″) and activated ("signal II"); its roles in intestinal cells and immune cells; how NLRP6 and NLRP9 coordinate to regulate the anti-viral immune response in the intestine; potential targeting of NLRP6 in human diseases.
Collapse
Affiliation(s)
- Runzhi Li
- Department of Digestive Disease, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China; Hefei National Laboratory for Physical Sciences at Microscale, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, China
| | - Shu Zhu
- Department of Digestive Disease, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China; Hefei National Laboratory for Physical Sciences at Microscale, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, China; School of Data Science, University of Science and Technology of China, Hefei, 230026, China; CAS Centre for Excellence in Cell and Molecular Biology, University of Science and Technology of China, Hefei, China.
| |
Collapse
|
29
|
NLRP6 expressed in astrocytes aggravates neurons injury after OGD/R through activating the inflammasome and inducing pyroptosis. Int Immunopharmacol 2020; 80:106183. [PMID: 31927506 DOI: 10.1016/j.intimp.2019.106183] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 12/21/2019] [Accepted: 12/31/2019] [Indexed: 11/22/2022]
Abstract
NLRP6, the nucleotide oligomerization domain-like receptor family pyrin domain containing 6, has a substantiable effect on inflammation and host defense against microorganisms. In our previous study, NLRP6 promotes inflammation after cerebral I/R injury in a MCAO model. However, the effect of NLRP6 in different nerve cells subjected to OGD/R needs to be further understood. Here, evidence shows that the expression of NLRP6 is increased in different nerve cells subjected to OGD/R, and mainly expressed in astrocytes. NLRP6 may up-regulate inflammation factors (IL-1β, Il-8) via the form of inflammasomes in astrocytes after OGD/R. Then, primary neuron-astrocyte co-culture model under OGD/R in vitro was performed, and we found that NLRP6 decreased the neurons viability and aggravated apoptosis of neurons. Mechanically, NLRP6 could induce pyroptosis to regulate the survival of neurons through activating caspase-1.
Collapse
|