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Role of Transcription Factor Nrf2 in Pyroptosis in Spinal Cord Injury by Regulating GSDMD. Neurochem Res 2023; 48:172-187. [PMID: 36040608 DOI: 10.1007/s11064-022-03719-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 07/26/2022] [Accepted: 08/01/2022] [Indexed: 02/07/2023]
Abstract
Spinal cord injury (SCI) is a prevalent disease that debilitates millions of people. Nuclear factor E2-related factor 2 (Nrf2) is an important regulator of SCI. The current study sought to elaborate on the effects of Nrf2 on gasdermin D (GSDMD)-mediated microglia pyroptosis to repair SCI. The SCI rat model was established via the percussion of the T10 spinal cord and in vitro SCI model was established on BV-2 cells via lipopolysaccharide (LPS)/adenosine triphosphate (ATP) treatment. Nrf2 expression in SCI rats and BV-2 cells was overexpressed via pcDNA3.1-Nrf2 injection. Functional assays were carried out to evaluate SCI rat pathological injury, BV-2 cell viability, the release of lactate dehydrogenase (LDH), and pyroptotic factors. The binding relations of Nrf2 and microRNA (miR)-146a and miR-146a and GSDMD were verified. BV-2 pyroptosis was analyzed after the combined experiment of miR-146a-inhibitor and pcDNA3.1-GSDMD. Our experiments revealed that Nrf2 was downregulated in SCI, and Nrf2 overexpression relieved SCI pathological injury, promoted BV-2 cell viability, inhibited the release of LDH, and repressed pyroptosis. Mechanically, Nrf2 bound to the miR-146a promoter and promoted miR-146a expression, and miR-146a targeted GSDMD transcription. Rescue experiments revealed that miR-146a knockdown or GSDMD overexpression annulled the inhibitory function of Nrf2 overexpression in LPS/ATP-induced microglia pyroptosis. Overall, our findings initially highlighted that Nrf2 inhibited GSDMD-mediated microglia pyroptosis and accelerated SCI repair by repressing miR-146a.
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Ding JF, Zhou Y, Xu SS, Shi KH, Sun H, Tu B, Song K, Xuan HY, Sha JM, Zhao JY, Tao H. Epigenetic control of LncRNA NEAT1 enables cardiac fibroblast pyroptosis and cardiac fibrosis. Eur J Pharmacol 2022; 938:175398. [PMID: 36455647 DOI: 10.1016/j.ejphar.2022.175398] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 11/13/2022] [Accepted: 11/15/2022] [Indexed: 11/30/2022]
Abstract
Cardiac fibroblasts (CFs) drive extracellular matrix remodeling after inflammatory injury, leading to cardiac fibrosis and diastolic dysfunction. Recent studies described the role of epigenetics in cardiac fibrosis. Nevertheless, detailed reports on epigenetics regulating CFs pyroptosis and describing their implication in cardiac fibrosis are still unclear. Here, we found that DNMT3A reduces the expression of lncRNA Neat1 and promotes the NLRP3 axis leading to CFs pyroptosis, using cultured cells, animal models, and clinical samples to shed light on the underlying mechanism. We report that pyroptosis-related genes are increased explicitly in cardiac fibrosis tissue and LPS-treated CFs, while lncRNA Neat1 decreased. Mechanistically, we show that loss of DNMT3A or overexpression of lncRNA Neat1 in CFs after LPS treatment significantly enhances CFs pyroptosis and the production of pyroptosis-related markers in vitro. It has been demonstrated that DNMT3A can decrease lncRNA Neat1, promoting NLRP3 axis activation in CFs treated with LPS. In sum, this study is the first to identify that DNMT3A methylation decreases the expression of lncRNA Neat1 and promotes CFs pyroptosis and cardiac fibrosis, suggesting that DNMT3A and NEAT1 may function as an anti-fibrotic therapy target in cardiac fibrosis.
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Affiliation(s)
- Ji-Fei Ding
- Department of Cardiothoracic Surgery, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, China; Department of Cardiothoracic Surgery, The Second Hospital of Anhui Medical University, Hefei, 230601, China
| | - Yang Zhou
- Department of Cardiothoracic Surgery, The Second Hospital of Anhui Medical University, Hefei, 230601, China
| | - Sheng-Song Xu
- Department of Cardiothoracic Surgery, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, China; Department of Cardiothoracic Surgery, The Second Hospital of Anhui Medical University, Hefei, 230601, China
| | - Kai-Hu Shi
- Department of Cardiothoracic Surgery, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, China.
| | - He Sun
- Department of Cardiothoracic Surgery, The Second Hospital of Anhui Medical University, Hefei, 230601, China
| | - Bin Tu
- Department of Cardiothoracic Surgery, The Second Hospital of Anhui Medical University, Hefei, 230601, China
| | - Kai Song
- Department of Cardiothoracic Surgery, The Second Hospital of Anhui Medical University, Hefei, 230601, China
| | - Hai-Yang Xuan
- Department of Cardiology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, PR China
| | - Ji-Ming Sha
- Department of Cardiothoracic Surgery, The Second Hospital of Anhui Medical University, Hefei, 230601, China
| | - Jian-Yuan Zhao
- Department of Anesthesiology, The Second Hospital of Anhui Medical University, Hefei, 230601, China; Institute for Developmental and Regenerative Cardiovascular Medicine, MOE-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China.
| | - Hui Tao
- Department of Anesthesiology, The Second Hospital of Anhui Medical University, Hefei, 230601, China.
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Yin J, Gong G, Wan W, Liu X. Pyroptosis in spinal cord injury. Front Cell Neurosci 2022; 16:949939. [PMID: 36467606 PMCID: PMC9715394 DOI: 10.3389/fncel.2022.949939] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 11/03/2022] [Indexed: 10/21/2023] Open
Abstract
Spinal cord injury (SCI) often brings devastating consequences to patients and their families. Pathophysiologically, the primary insult causes irreversible damage to neurons and glial cells and initiates the secondary damage cascade, further leading to inflammation, ischemia, and cells death. In SCI, the release of various inflammatory mediators aggravates nerve injury. Pyroptosis is a new pro-inflammatory pattern of regulated cell death (RCD), mainly mediated by caspase-1 or caspase-11/4/5. Gasdermins family are pore-forming proteins known as the executor of pyroptosis and the gasdermin D (GSDMD) is best characterized. Pyroptosis occurs in multiple central nervous system (CNS) cell types, especially plays a vital role in the development of SCI. We review here the evidence for pyroptosis in SCI, and focus on the pyroptosis of different cells and the crosstalk between them. In addition, we discuss the interaction between pyroptosis and other forms of RCD in SCI. We also summarize the therapeutic strategies for pyroptosis inhibition, so as to provide novel ideas for improving outcomes following SCI.
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Affiliation(s)
- Jian Yin
- Department of Orthopedics, The Affiliated Jiangning Hospital With Nanjing Medical University, Nanjing, China
- Department of Orthopedics, Shanghai General Hospital of Nanjing Medical University, Shanghai, China
| | - Ge Gong
- Department of Geriatrics, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Wenhui Wan
- Department of Geriatrics, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Xinhui Liu
- Department of Orthopedics, The Affiliated Jiangning Hospital With Nanjing Medical University, Nanjing, China
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Zhang J, Deng J, Ding R, Yuan J, Liu J, Zhao X, Wu T, Jia J, Cheng X. Identification of pyroptosis-related genes and long non-coding RNAs signatures in osteosarcoma. Cancer Cell Int 2022; 22:322. [PMID: 36244998 PMCID: PMC9575257 DOI: 10.1186/s12935-022-02729-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 09/26/2022] [Indexed: 11/10/2022] Open
Abstract
Osteosarcoma is a highly malignant tumor, with very high disability and fatality rates. However, the overall prognosis is not optimistic. Pyroptosis is a newly discovered cell death modality accompanied by inflammation, which is closely related to varieties of cancers. In this study, the RNA-seq data were downloaded from public databases, the differences in the expression of the pyroptosis-related genes (PRGs) were identified, and the six PRGs signature was established through the univariate and LASSO Cox analysis. The patients were grouped according to the PRGs signature, and the prognosis between the two groups was further compared. In addition, a ten pyroptosis-related lncRNAs (PRLs) prognostic signature was also constructed. Through functional analysis of the differentially expressed genes (DEGs), the immune-related pathways were found to be enriched. The Pearson correlation analysis showed a strong correlation between the pyroptosis-related biomarkers. Finally, we identified a promising biomarker, CHMP4C, which is highly expressed in osteosarcoma. Overexpression of CHMP4C promoted the proliferation, migration and invasion of the osteosarcoma cell. Our results thus provide new evidence for exploring prognostic biomarkers and therapeutic targets of osteosarcoma.
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Reyes EY, Shinohara ML. Host immune responses in the central nervous system during fungal infections. Immunol Rev 2022; 311:50-74. [PMID: 35672656 PMCID: PMC9489659 DOI: 10.1111/imr.13101] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 04/24/2022] [Accepted: 05/18/2022] [Indexed: 12/19/2023]
Abstract
Fungal infections in the central nervous system (CNS) cause high morbidity and mortality. The frequency of CNS mycosis has increased over the last two decades as more individuals go through immunocompromised conditions for various reasons. Nevertheless, options for clinical interventions for CNS mycoses are still limited. Thus, there is an urgent need to understand the host-pathogen interaction mechanisms in CNS mycoses for developing novel treatments. Although the CNS has been regarded as an immune-privileged site, recent studies demonstrate the critical involvement of immune responses elicited by CNS-resident and CNS-infiltrated cells during fungal infections. In this review, we discuss mechanisms of fungal invasion in the CNS, fungal pathogen detection by CNS-resident cells (microglia, astrocytes, oligodendrocytes, neurons), roles of CNS-infiltrated leukocytes, and host immune responses. We consider that understanding host immune responses in the CNS is crucial for endeavors to develop treatments for CNS mycosis.
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Affiliation(s)
- Estefany Y. Reyes
- Department of Immunology, Duke University School of Medicine, Durham, NC 27705, USA
| | - Mari L. Shinohara
- Department of Immunology, Duke University School of Medicine, Durham, NC 27705, USA
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC 27705, USA
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Yuan S, Wang Y, Li Z, Chen X, Song P, Chen A, Qu Z, Wen S, Liu H, Zhu X. Gasdermin D is involved in switching from apoptosis to pyroptosis in TLR4-mediated renal tubular epithelial cells injury in diabetic kidney disease. Arch Biochem Biophys 2022; 727:109347. [PMID: 35809639 DOI: 10.1016/j.abb.2022.109347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 07/01/2022] [Accepted: 07/01/2022] [Indexed: 11/02/2022]
Abstract
BACKGROUND Toll-like receptor 4 (TLR4) mediated pathway plays a pivotal role in promoting tubulointerstitial inflammation and contributes to the progression in type 2 diabetic kidney disease (T2DKD). As the first identified key pyroptosis executor, gasdermin D (GSDMD) is activated by caspases and might be the key protein to switch apoptosis to pyroptosis. It remains unclear that role of TLR4 on canonical pyroptosis pathway, and whether GSDMD is involved in switching from apoptosis to pyroptosis in the TLR4-related tubular injury in T2DKD. METHODS Immunohistochemistry staining was used to detect the expression of pyroptosis-related proteins in renal tissues of T2DKD patients. T2DKD models was induced in TLR4 knockout (TLR4-/-) mice through a high-fat diet combined with streptozotocin. Pyroptosis (caspase-1, GSDMD, interleukin 18(IL-18), interleukin 1β(IL-1β)) and apoptosis levels (caspase-3, Bax and Bcl-2) were detected by Western blot. HK-2 cells were cultured under high-glucose (HG) conditions as an in vitro model and then challenged with a TLR4-specific antagonist (TAK-242). GSDMD small interfering RNA (siRNA) and overexpression plasmid were transfected into HK-2 cells to down- or up-regulate GSDMD. The pyroptosis and apoptosis rates were determined by flow cytometry. RESULTS The expression levels of caspase-1, GSDMD, IL-18 and IL-1β were increased in renal biopsy tissues of T2DKD patients and GSDMD expression was positively correlated with tubular injury. Silencing GSDMD attenuated HG-induced IL-18, IL-1β, FN and α-SMA, and reduced pyroptotic cells rate in HK-2 cells. Up-regulation of GSDMD inhibited HG-induced expression of Bax and cleaved caspase-3 and reduced apoptosis rate. TLR4 knockout alleviated tubular injury and interstitial macrophages infiltration, improved impaired renal dysfunction, and decreased the expressions of active N-terminal of GSDMD(GSDMD-N), cleaved caspase-1(cl-caspase-1) and cleaved caspase-3(cl-caspase-3) in T2DKD mice. TLR4 inhibition reduced HG-induced pyroptosis and apoptosis level in HK-2 cells, while GSDMD up-regulation increased pyroptosis rate and decreased apoptosis rate. CONCLUSIONS TLR4 could exacerbate tubular injury and fibrosis via GSDMD-mediated canonical pyroptosis pathway in T2DKD. Activation of GSDMD could inhibit apoptosis and activate pyroptosis, which may involve the potential switch mechanism between TLR4-mediated pyroptosis and apoptosis in T2DKD.
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Affiliation(s)
- Shuguang Yuan
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China
| | - Youliang Wang
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China; State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Disease, Division of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Zheng Li
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China
| | - Xiaojun Chen
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China
| | - Panai Song
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China
| | - Anqun Chen
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China
| | - Zhong Qu
- Department of Emergency Surgery, Changsha Central Hospital, Changsha, Hunan, China
| | - Si Wen
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China
| | - Hong Liu
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China
| | - Xuejing Zhu
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China.
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Almouh M, Razmara E, Bitaraf A, Ghazimoradi MH, Hassan ZM, Babashah S. Circular RNAs play roles in regulatory networks of cell signaling pathways in human cancers. Life Sci 2022; 309:120975. [PMID: 36126723 DOI: 10.1016/j.lfs.2022.120975] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 09/10/2022] [Accepted: 09/14/2022] [Indexed: 10/31/2022]
Abstract
AIMS Circular RNAs (circRNAs) are endogenous covalently closed non-coding RNAs produced by reverse splicing of linear RNA. These molecules are highly expressed in mammalian cells and show cell/tissue-specific expression patterns. They are also significantly dysregulated in various cancers and function as oncogenes or tumor suppressors. Emerging evidence reveals that circRNAs contribute to cancer progression via modulating different cell signaling pathways. Nevertheless, the functional significance of circRNAs in cell signaling pathways regulation is still largely elusive. Considering this, shedding light on the multi-pathway effects of circRNAs may improve our understanding of targeted cancer therapy. Here, we discuss how circRNAs regulate the major cell signaling pathways in human cancers. MATERIALS AND METHODS We adopted a systematic search in PubMed using the following MeSH terms: circRNAs, non-coding RNAs, lncRNAs, exosomal circRNAs, cancer, and cell signaling. KEY FINDINGS We discussed different roles of circRNAs during tumorigenesis in which circRNAs affect tumor development through activating or inactivating certain cell signaling pathways via molecular interactions using various signaling pathways. We also discussed how crosstalk between circRNAs and lncRNAs modulate tumorigenesis and provides a resource for the identification of cancer therapeutic targets. SIGNIFICANCE We here elucidated how circRNAs can modulate different cell signaling pathways and play roles in cancer. This can broaden our horizons toward introducing promising prognostic, diagnostic, and therapeutic targets.
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Affiliation(s)
- Mansour Almouh
- Department of Molecular Genetics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Ehsan Razmara
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC 3800, Australia
| | - Amirreza Bitaraf
- Department of Molecular Genetics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Mohammad H Ghazimoradi
- Department of Molecular Genetics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Zuhair Mohammad Hassan
- Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Sadegh Babashah
- Department of Molecular Genetics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran.
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Wang Y, Chen X, Jiang F, Shen Y, Fang F, Li Q, Yang C, Dong Y, Shen X. A prognostic signature of pyroptosis-related lncRNAs verified in gastric cancer samples to predict the immunotherapy and chemotherapy drug sensitivity. Front Genet 2022; 13:939439. [PMID: 36147488 PMCID: PMC9485603 DOI: 10.3389/fgene.2022.939439] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 08/09/2022] [Indexed: 11/13/2022] Open
Abstract
Background: Pyroptosis is a recently identified mode of programmed inflammatory cell death that has remarkable implications for cancer development. lncRNAs can be involved in cellular regulation through various pathways and play a critical role in gastric cancer (GC). However, pyroptosis -related lncRNAs (PRlncRNAs) have been rarely studied in GC. Methods: Pyroptosis-related gene were abstracted from the literature and GSEA Molecular Signatures data resource. PRlncRNAs were obtained using co-expression analysis. LASSO Cox regression assessment was employed to build a risk model. Kaplan-Meier (KM), univariate along with multivariate Cox regression analysis were adopted to verify the predictive efficiency of the risk model in terms of prognosis. qRT-PCR was adopted to validate the expression of PRlncRNAs in GC tissues. In addition, immune cell infiltration assessment and ESTIMATE score evaluation were adopted for assessing the relationship of the risk model with the tumor immune microenvironment (TME). Finally, immune checkpoint gene association analysis and chemotherapy drug sensitivity analysis were implemented to assess the worthiness of our risk model in immunotherapy and chemotherapy of GC. Results: We identified 3 key PRlncRNAs (PVT1, CYMP-AS1 and AC017076.1) and testified the difference of their expression levels in GC tumor tissues and neighboring non-malignant tissues (p < 0.05). PRlncRNAs risk model was able to successfully estimate the prognosis of GC patients, and lower rate of survival was seen in the high-GC risk group relative to the low-GC risk group (p < 0.001). Other digestive system tumors such as pancreatic cancer further validated our risk model. There was a dramatic difference in TMB level between high-GC and low-GC risk groups (p < 0.001). Immune cell infiltration analysis and ESTIMATE score evaluation demonstrated that the risk model can be adopted as an indicator of TME status. Besides, the expressions of immunodetection site genes in different risk groups were remarkably different (CTLA-4 (r = −0.14, p = 0.010), VISTA (r = 0.15, p = 0.005), and B7-H3 (r = 0.14, p = 0.009)). PRlncRNAs risk model was able to effectively establish a connection with the sensitivity of chemotherapeutic agents. Conclusion: The 3 PRlncRNAs identified in this study could be utilized to predict disease outcome in GC patients. It may also be a potential therapeutic target in GC therapy, including immunotherapy and chemotherapy.
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KDM3A Attenuates Myocardial Ischemic and Reperfusion Injury by Ameliorating Cardiac Microvascular Endothelial Cell Pyroptosis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:4622520. [PMID: 36092165 PMCID: PMC9463006 DOI: 10.1155/2022/4622520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 08/22/2022] [Indexed: 12/30/2022]
Abstract
Cardiac microvascular endothelial cell ischemia-reperfusion (CMEC I/R) injury occurs in approximately 50% of acute myocardial infarction patients subjected to successful revascularization therapy. This injury leads to cardiac microcirculatory system dysfunctions, which seriously affect cardiac functions and long-term prognostic outcomes. Previously, we elucidated the role of lysine-specific demethylase 3A (KDM3A) in protecting cardiomyocytes from I/R injury; however, its roles in CMEC I/R injuries have yet to be fully established. In this study, hypoxia/reoxygenation (H/R) treatment significantly impaired CMEC functions and induced their pyroptosis, accompanied by KDM3A downregulation. Then, gain- and loss-of-function assays were performed to investigate the roles of KDM3A in CMEC H/R injury in vitro. KDM3A knockout enhanced CMEC malfunctions and accelerated the expressions of pyroptosis-associated proteins, such as NLRP3, cleaved-caspase-1, ASC, IL-1β, GSDMD-N, and IL-18. Conversely, KDM3A overexpression developed ameliorated alternations in CMEC H/R injury. In vivo, KDM3A knockout resulted in the deterioration of cardiac functions and decreased the no-reflow area as well as capillary density. Mechanistically, KDM3A activated the PI3K/Akt signaling pathway and ameliorated I/R-mediated CMEC pyroptosis. In conclusion, KDM3A is a promising treatment target for alleviating CMEC I/R injury.
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Li J, Liu X, Wu H, Guo P, Li B, Wang J, Tian W, Chen D, Gao M, Zhou Z, Liu S. Identification of hub genes related to the innate immune response activated during spinal cord injury. FEBS Open Bio 2022; 12:1839-1856. [PMID: 36047918 PMCID: PMC9527585 DOI: 10.1002/2211-5463.13472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 08/01/2022] [Accepted: 08/17/2022] [Indexed: 12/14/2022] Open
Abstract
Spinal cord injury (SCI) often leads to sensory and motor dysfunction. Two major factors that hinder spinal cord repair are local inflammation and glial scar formation after SCI, and thus appropriate immunotherapy may alleviate damage. To characterize changes in gene expression that occur during SCI and thereby identify putative targets for immunotherapy, here we analyzed the dataset GSE5296 (containing one control group and six SCI groups at different timepoints) to identify differentially-expressed genes. Functional enrichment analysis was performed and a protein-protein interaction network was created to identify possible hub genes. Finally, we performed quantitative PCR to verify changes in gene expression. The CIBERSORT algorithm was used to analyze innate immune cell infiltration patterns. The dataset GSE162610 (containing one control group and three SCI groups at different timepoints) was analyzed to evaluate innate immune cell infiltration at the single-cell level. The dataset GSE151371 (containing one control group [n = 10] and an SCI group [n = 38]) was used to detect the expression of hub genes in the blood from SCI patients. Differentially-expressed innate immune-related genes at each timepoint were identified, and the functions and related signaling pathways of these genes were examined. Six hub genes were identified and verified. We then analyzed the expression characteristics of these hub genes and characteristics of innate immune infiltration in SCI; finally, we examined ligand expression in the context of the CCL signaling pathway and COMPLEMENT signaling pathway networks. This study reveals the characteristics of innate immune cell infiltration and temporal expression patterns of hub genes, and may aid in the development of immunotherapies for SCI.
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Affiliation(s)
- Jianfeng Li
- Innovation Platform of Regeneration and Repair of Spinal Cord and Nerve Injury, Department of Orthopedic Surgery, The Seventh Affiliated HospitalSun Yat‐sen UniversityShenzhenChina,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Orthopedic Research Institute/Department of Spinal SurgeryThe First Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouChina
| | - Xizhe Liu
- Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Orthopedic Research Institute/Department of Spinal SurgeryThe First Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouChina
| | - Huachuan Wu
- Innovation Platform of Regeneration and Repair of Spinal Cord and Nerve Injury, Department of Orthopedic Surgery, The Seventh Affiliated HospitalSun Yat‐sen UniversityShenzhenChina,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Orthopedic Research Institute/Department of Spinal SurgeryThe First Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouChina
| | - Peng Guo
- Innovation Platform of Regeneration and Repair of Spinal Cord and Nerve Injury, Department of Orthopedic Surgery, The Seventh Affiliated HospitalSun Yat‐sen UniversityShenzhenChina
| | - Baoliang Li
- Innovation Platform of Regeneration and Repair of Spinal Cord and Nerve Injury, Department of Orthopedic Surgery, The Seventh Affiliated HospitalSun Yat‐sen UniversityShenzhenChina
| | - Jianmin Wang
- Innovation Platform of Regeneration and Repair of Spinal Cord and Nerve Injury, Department of Orthopedic Surgery, The Seventh Affiliated HospitalSun Yat‐sen UniversityShenzhenChina
| | - Wei Tian
- Laboratory of Bone Tissue Engineering, Beijing Laboratory of Biomedical Materials, Beijing Research Institute of Orthopedics and TraumatologyBeijing Jishuitan HospitalChina
| | - Dafu Chen
- Laboratory of Bone Tissue Engineering, Beijing Laboratory of Biomedical Materials, Beijing Research Institute of Orthopedics and TraumatologyBeijing Jishuitan HospitalChina
| | - Manman Gao
- Department of Sport Medicine, Institute of Translational MedicineThe First Affiliated Hospital of Shenzhen University, Shenzhen Second People's HospitalChina,Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical EngineeringShenzhen University Health Science CenterChina
| | - Zhiyu Zhou
- Innovation Platform of Regeneration and Repair of Spinal Cord and Nerve Injury, Department of Orthopedic Surgery, The Seventh Affiliated HospitalSun Yat‐sen UniversityShenzhenChina,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Orthopedic Research Institute/Department of Spinal SurgeryThe First Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouChina
| | - Shaoyu Liu
- Innovation Platform of Regeneration and Repair of Spinal Cord and Nerve Injury, Department of Orthopedic Surgery, The Seventh Affiliated HospitalSun Yat‐sen UniversityShenzhenChina,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Orthopedic Research Institute/Department of Spinal SurgeryThe First Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouChina
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Zhang H, Zhang J. Bone Marrow Mesenchymal Stem Cells (BMSCs) Promote the Repair of Spinal Cord Injury Nerve Cells by Regulating the Toll-Like Receptor 4/Nuclear Transcription Factor-Kappa B (TLR4/NF- κB) Signaling Pathway. J BIOMATER TISS ENG 2022. [DOI: 10.1166/jbt.2022.3117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
To explore the role of bone mesenchymal stem cells (BMSCs) transplantation and erythropoietin (EPO) in repairing nerve function after spinal cord injury (SCI) in rats. SCI SD model rats (n = 60) were randomly assigned into control group, BMSCs group, combined group (BMSCs combined
with EPO treatment) with 20 rats in each group followed by analysis of rat nerve function on day 1, 3, 7, 14 and 28 after SCI using BBB scoring standard, cell apoptosis by TUNEL kit staining along with detection of NF200 expression. On day 7, 14, and 28 after SCI, BBB scores of BMSCs group
and both the BMSCs group and the combined group had significantly higher BBB scores (P < 0.05), and the combined group had a higher BBB score (P < 0.05). On day 1, 3, 7, 14 and 28 after SCI, the apoptosis index of BMSCs group and combination group were significantly reduced
(P < 0.05) with more reduction in combination group than BMSCs group (P < 0.05). Meanwhile, BMSCs group and combination group presented increased NF200 expression and BrdU positive rate compared to control group (P < 0.05). In SCI rats, the combined use of BMSCs
transplantation and EPO therapy can effectively reduce cell apoptosis, upregulate neurofilament protein, and effectively promote recovery of nerve function.
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Affiliation(s)
- Haiying Zhang
- Department of Medical Imaging, Central Hospital of Huanggang, Huanggang, 438000, Hubei, China
| | - Jie Zhang
- Operating Room, The Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, 445000, Hubei, China
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62
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Wu X, Wan T, Gao X, Fu M, Duan Y, Shen X, Guo W. Microglia Pyroptosis: A Candidate Target for Neurological Diseases Treatment. Front Neurosci 2022; 16:922331. [PMID: 35937897 PMCID: PMC9354884 DOI: 10.3389/fnins.2022.922331] [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: 04/17/2022] [Accepted: 06/23/2022] [Indexed: 11/13/2022] Open
Abstract
In addition to its profound implications in the fight against cancer, pyroptosis have important role in the regulation of neuronal injury. Microglia are not only central members of the immune regulation of the central nervous system (CNS), but are also involved in the development and homeostatic maintenance of the nervous system. Under various pathological overstimulation, microglia pyroptosis contributes to the massive release of intracellular inflammatory mediators leading to neuroinflammation and ultimately to neuronal damages. In addition, microglia pyroptosis lead to further neurological damage by decreasing the ability to cleanse harmful substances. The pathogenic roles of microglia in a variety of CNS diseases such as neurodegenerative diseases, stroke, multiple sclerosis and depression, and many other neurological disorders have been gradually unveiled. In the context of different neurological disorders, inhibition of microglia pyroptosis by targeting NOD-like receptor family pyrin domain containing (NLRP) 3, caspase-1 and gasdermins (GSDMs) by various chemical agents as well as natural products significantly improve the symptoms or outcome in animal models. This study will provide new ideas for immunomodulatory treatment of CNS diseases.
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Affiliation(s)
- Xian Wu
- The First Affiliated Hospital of Hunan College of Traditional Chinese Medicine, Hunan Province Directly Affiliated TCM Hospital, Zhuzhou, China
| | - Teng Wan
- Huazhong University of Science and Technology Union Shenzhen Hospital, The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China
| | - Xiaoyu Gao
- Hengyang Medical College, University of South China, Hengyang, China
| | - Mingyuan Fu
- Hengyang Medical College, University of South China, Hengyang, China
| | - Yunfeng Duan
- The First Affiliated Hospital of Hunan College of Traditional Chinese Medicine, Hunan Province Directly Affiliated TCM Hospital, Zhuzhou, China
| | - Xiangru Shen
- Hengyang Medical College, University of South China, Hengyang, China
- *Correspondence: Xiangru Shen
| | - Weiming Guo
- Huazhong University of Science and Technology Union Shenzhen Hospital, The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China
- Weiming Guo
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63
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Hua T, Yang M, Song H, Kong E, Deng M, Li Y, Li J, Liu Z, Fu H, Wang Y, Yuan H. Huc-MSCs-derived exosomes attenuate inflammatory pain by regulating microglia pyroptosis and autophagy via the miR-146a-5p/TRAF6 axis. J Nanobiotechnology 2022; 20:324. [PMID: 35836229 PMCID: PMC9281091 DOI: 10.1186/s12951-022-01522-6] [Citation(s) in RCA: 49] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 06/21/2022] [Indexed: 12/19/2022] Open
Abstract
Background Chronic inflammatory pain significantly reduces the quality of life and lacks effective interventions. In recent years, human umbilical cord mesenchymal stem cells (huc-MSCs)-derived exosomes have been used to relieve neuropathic pain and other inflammatory diseases as a promising cell-free therapeutic strategy. However, the therapeutic value of huc-MSCs-derived exosomes in complete Freund's adjuvant (CFA)-induced inflammatory pain remains to be confirmed. In this study, we investigated the therapeutic effect and related mechanisms of huc-MSCs-derived exosomes in a chronic inflammatory pain model. Methods C57BL/6J male mice were used to establish a CFA-induced inflammatory pain model, and huc-MSCs-derived exosomes were intrathecally injected for 4 consecutive days. BV2 microglia cells were stimulated with lipopolysaccharide (LPS) plus adenosine triphosphate (ATP) to investigate the effect of huc-MSCs-derived exosomes on pyroptosis and autophagy. Bioinformatic analysis and rescue experiments were used to demonstrate the role of miR-146a-5p/ TRAF6 in regulating pyroptosis and autophagy. Western blotting, RT-qPCR, small interfering RNA and Yo-Pro-1 dye staining were performed to investigate the related mechanisms. Results Huc-MSCs-derived exosomes alleviated mechanical allodynia and thermal hyperalgesia in CFA-induced inflammatory pain. Furthermore, huc-MSCs-derived exosomes attenuated neuroinflammation by increasing the expression of autophagy-related proteins (LC3-II and beclin1) and inhibiting the activation of NLRP3 inflammasomes in the spinal cord dorsal horn. In vitro, NLRP3 inflammasome components (NLRP3, caspase1-p20, ASC) and gasdermin D (GSDMD-F, GSDMD-N) were inhibited in BV2 cells pretreated with huc-MSCs-derived exosomes. Western blot and Yo-Pro-1 dye staining demonstrated that 3-MA, an autophagy inhibitor, weakened the protective effect of huc-MSCs-derived exosomes on BV2 cell pyroptosis. Importantly, huc-MSCs-derived exosomes transfected with miR-146a-5p mimic promoted autophagy and inhibited BV2 cell pyroptosis. TRAF6, as a target gene of miR-146a-5p, was knocked down via small-interfering RNA, which increased pyroptosis and inhibited autophagy. Conclusion Huc-MSCs-derived exosomes attenuated inflammatory pain via miR-146a-5p/TRAF6, which increased the level of autophagy and inhibited pyroptosis. Graphical Abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s12951-022-01522-6.
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Affiliation(s)
- Tong Hua
- Department of Anesthesiology, Changzheng Hospital, Naval Medical University, Shanghai, 200003, China
| | - Mei Yang
- Department of Anesthesiology, Changzheng Hospital, Naval Medical University, Shanghai, 200003, China
| | - Honghao Song
- Department of Anesthesiology, Changzheng Hospital, Naval Medical University, Shanghai, 200003, China
| | - Erliang Kong
- Department of Anesthesiology, Changzheng Hospital, Naval Medical University, Shanghai, 200003, China
| | - Mengqiu Deng
- Department of Anesthesiology, Changzheng Hospital, Naval Medical University, Shanghai, 200003, China
| | - Yongchang Li
- Department of Anesthesiology, Changzheng Hospital, Naval Medical University, Shanghai, 200003, China
| | - Jian Li
- Department of Anesthesiology, Changzheng Hospital, Naval Medical University, Shanghai, 200003, China
| | - Zhixiao Liu
- Research Center of Developmental Biology, Department of Histology and Embryology, College of Basic Medicine, Naval Medical University, Shanghai, 200433, China
| | - Hailong Fu
- Department of Anesthesiology, Changzheng Hospital, Naval Medical University, Shanghai, 200003, China.
| | - Yue Wang
- Stem Cell and Regeneration Medicine Institute, Research Center of Translational Medicine, Naval Medical University, Shanghai, 200433, China.
| | - Hongbin Yuan
- Department of Anesthesiology, Changzheng Hospital, Naval Medical University, Shanghai, 200003, China.
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64
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Gao X, Cao Z, Tan H, Li P, Su W, Wan T, Guo W. LncRNA, an Emerging Approach for Neurological Diseases Treatment by Regulating Microglia Polarization. Front Neurosci 2022; 16:903472. [PMID: 35860297 PMCID: PMC9289270 DOI: 10.3389/fnins.2022.903472] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 06/06/2022] [Indexed: 12/12/2022] Open
Abstract
Neurological disorders cause untold human disability and death each year. For most neurological disorders, the efficacy of their primary treatment strategies remains suboptimal. Microglia are associated with the development and progression of multiple neurological disorders. Targeting the regulation of microglia polarization has emerged as an important therapeutic strategy for neurological disorders. Their pro-inflammatory (M1)/anti-inflammatory (M2) phenotype microglia are closely associated with neuronal apoptosis, synaptic plasticity, blood-brain barrier integrity, resistance to iron death, and astrocyte regulation. LncRNA, a recently extensively studied non-coding transcript of over 200 nucleotides, has shown great value to intervene in microglia polarization. It can often participate in gene regulation of microglia by directly regulating transcription or sponging downstream miRNAs, for example. Through proper regulation, microglia can exert neuroprotective effects, reduce neurological damage and improve the prognosis of many neurological diseases. This paper reviews the progress of research linking lncRNAs to microglia polarization and neurological diseases.
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Affiliation(s)
- Xiaoyu Gao
- Hengyang Medical College, University of South China, Hengyang, Hunan, China
| | - Zilong Cao
- Hengyang Medical College, University of South China, Hengyang, Hunan, China
| | - Haifeng Tan
- Hengyang Medical College, University of South China, Hengyang, Hunan, China
| | - Peiling Li
- Hengyang Medical College, University of South China, Hengyang, Hunan, China
| | - Wenen Su
- Hengyang Medical College, University of South China, Hengyang, Hunan, China
| | - Teng Wan
- Sports Medicine Department, Huazhong University of Science and Technology Union Shenzhen Hospital, The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China
- Hengyang Medical College, University of South China, Hengyang, Hunan, China
- Teng Wan,
| | - Weiming Guo
- Sports Medicine Department, Huazhong University of Science and Technology Union Shenzhen Hospital, The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China
- *Correspondence: Weiming Guo,
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Huang SX, Mei HB, Liu K, Tang J, Wu JY, Zhu GH, Ye WH. CircPVT1 promotes the tumorigenesis and metastasis of osteosarcoma via mediation of miR-26b-5p/CCNB1 axis. J Bone Miner Metab 2022; 40:581-593. [PMID: 35648221 DOI: 10.1007/s00774-022-01326-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 03/09/2022] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Osteosarcoma (OS) is the most aggressive malignancy among the bone tumors in the world. Circular RNAs (circRNAs) have been reported to be participated in multiple cancers, including OS. Meanwhile, circPVT1 has been proved to be upregulated in OS. However, the mechanism by which circPVT1 mediates the tumorigenesis of OS remains to be further explored. MATERIALS AND METHODS Protein and gene expressions in OS cells were measured by western blot and RT-qPCR, respectively. Cell growth was assessed by flow cytometry and colony formation, respectively. In addition, cell migration was assessed by wound healing, and invasion was evaluated by Transwell assay. Meanwhile, the correlation among circPVT1, miR-26b-5p and CCNB1 was explored by RNA pull-down and dual luciferase assay. Finally, in vivo model was established to explore the role of circPVT1 in OS in vivo. RESULTS CircPVT1 and CCNB1 were significantly upregulated in OS cells, while miR-26b-5p was downregulated. Knockdown of circPVT1 notably inhibited proliferation and induced apoptosis of OS cells. CircPVT1 shRNA significantly suppressed the OS cell invasion and migration. Meanwhile, circPVT1 sponged miR-26b-5p and CCNB1 was found to be the direct target of miR-26b-5p. Furthermore, silencing of circPVT1 inhibited the growth and metastasis of OS in vivo. CONCLUSION Silencing of circPVT1 notably suppressed the tumorigenesis and metastasis of OS via miR-26b-5p/CCNB1 axis. Therefore, circPVT1 might be used as a target for OS treatment.
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Affiliation(s)
- Sheng-Xiang Huang
- Department of Pediatric Orthopedics, Hunan Children's Hospital, No. 86, Ziyuan Road, Changsha, 410007, Hunan, People's Republic of China
| | - Hai-Bo Mei
- Department of Pediatric Orthopedics, Hunan Children's Hospital, No. 86, Ziyuan Road, Changsha, 410007, Hunan, People's Republic of China
| | - Kun Liu
- Department of Pediatric Orthopedics, Hunan Children's Hospital, No. 86, Ziyuan Road, Changsha, 410007, Hunan, People's Republic of China
| | - Jin Tang
- Department of Pediatric Orthopedics, Hunan Children's Hospital, No. 86, Ziyuan Road, Changsha, 410007, Hunan, People's Republic of China
| | - Jiang-Yan Wu
- Department of Pediatric Orthopedics, Hunan Children's Hospital, No. 86, Ziyuan Road, Changsha, 410007, Hunan, People's Republic of China
| | - Guang-Hui Zhu
- Department of Pediatric Orthopedics, Hunan Children's Hospital, No. 86, Ziyuan Road, Changsha, 410007, Hunan, People's Republic of China
| | - Wei-Hua Ye
- Department of Pediatric Orthopedics, Hunan Children's Hospital, No. 86, Ziyuan Road, Changsha, 410007, Hunan, People's Republic of China.
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66
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Liang W, Han B, Hai Y, Liu Y, Liu X, Yang J, Sun D, Yin P. The Role of Microglia/Macrophages Activation and TLR4/NF-κB/MAPK Pathway in Distraction Spinal Cord Injury-Induced Inflammation. Front Cell Neurosci 2022; 16:926453. [PMID: 35755773 PMCID: PMC9218068 DOI: 10.3389/fncel.2022.926453] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 05/16/2022] [Indexed: 11/16/2022] Open
Abstract
Distraction spinal cord injuries (DSCIs) often occur as the neurological complication of distraction forces following the implantation of internal fixation devices during scoliosis correction surgery. However, the underlying mechanism behind these injuries remains unclear. The present study aimed to explore the activation of microglia and macrophages, as well as changes in TLR4-mediated NF-κB and MAPK pathway activity after DSCIs in Bama miniature pigs. Prior to surgical intervention, the pigs were randomly divided into three groups: the sham group, the complete distraction spinal cord injury (CDSCI) group, and the incomplete distraction spinal cord injury (IDSCI) group. After surgery, the Tarlov scale and individual limb motor scale (ILMS) were used to evaluate changes in the pigs’ behavior. All pigs were euthanized 7 days after surgery, and histopathological examinations of the spinal cord tissues were performed. Immunohistochemistry was used to detect Caspase-3 expression in the anterior horn of spinal gray matter tissues. Immunofluorescence staining was utilized to assess the M1/M2 phenotype changes in microglia/macrophages and NF-κB P65 expression in central DSCI lesions, while western blotting was performed to determine the expression of TLR4/NF-κB/MAPK pathway-related proteins. The results of the present study showed that the Tarlov and ILMS scores decreased significantly in the two DSCI groups compared with the sham group. Hematoxylin and eosin (HE) and Nissl staining revealed that the tissue structure and nerve fiber tracts in the distracted spinal cord tissues were destroyed. Both DSCI groups showed the number of survived neurons decreased and the Caspase-3 expression increased. The results of the immunofluorescence staining indicated that the CD16 and CD206 expression in the microglia/macrophages increased. Between the two DSCI groups, the CDSCI group showed increased CD16 and decreased CD206 expression levels. The intensity of the fluorescence of NF-κB P65 was found to be significantly enhanced in pigs with DSCIs. Moreover, western blot results revealed that the expression of TLR4, p-IκBα, NF-κB P65, p-JNK, p-ERK, and p-P38 proteins increased in spinal cord tissues following DSCI. The present study was based on a porcine DSCI model that closely mimicked clinical DSCIs while clarifying DSCI-associated neuroinflammation mechanisms, in turn providing evidence for identifying potential anti-inflammatory targets.
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Affiliation(s)
- Weishi Liang
- Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Bo Han
- Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Yong Hai
- Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Yuzeng Liu
- Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Xing Liu
- Department of Pathology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jincai Yang
- Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Duan Sun
- Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Peng Yin
- Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
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67
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Li M, Zhong X, Xu WT. Substance P promotes the progression of bronchial asthma through activating the PI3K/AKT/NF-κB pathway mediated cellular inflammation and pyroptotic cell death in bronchial epithelial cells. Cell Cycle 2022; 21:2179-2191. [PMID: 35726575 DOI: 10.1080/15384101.2022.2092166] [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] [Indexed: 11/03/2022] Open
Abstract
NOD-like receptor family pyrin domain containing three (NLRP3) inflammasome-mediated pyroptotic cell death and inflammation contribute to the pathogenesis of bronchial asthma, and it is reported that Substance P (SP) plays important role in the process, however, the detailed molecular mechanisms by which SP participates in the aggravation of bronchial asthma have not been fully studied. Here, our clinical data showed that SP and its receptor Neurokinin-1 receptor (NK1R) were significantly elevated in the plasma and peripheral blood mononuclear cell (PBMC) collected from patients with bronchial asthma, and further pre-clinical experiments evidenced that SP suppressed cell viability, accelerated lactate dehydrogenase (LDH) release, and upregulated ASC, Caspase-1, NLRP3, IL-1β and IL-18 to promote pyroptotic cell death and cellular inflammation in the human bronchial epithelial cells and asthmatic mice models in vitro and in vivo. Interestingly, SP-induced pyroptotic cell death was reversed by NK1R inhibitor L732138. Then, we uncovered the underlying mechanisms, and found that SP activated the downstream PI3K/AKT/NF-κB signal pathway in a NK1R-dependent manner, and blockage of this pathway by both PI3K inhibitor (LY294002) and NF-κB inhibitor (MG132) reversed SP-induced pyroptotic cell death and recovered cell viability in bronchial epithelial cells. Collectively, we concluded that SP interacted with its receptor NK1R to activate the PI3K/AKT/NF-κB pathway, which further triggered NLRP3-mediated pyroptotic cell death in the bronchial epithelial cells, resulting in the aggravation of bronchial asthma.
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Affiliation(s)
- Miao Li
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xiao Zhong
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Wen-Ting Xu
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
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68
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Hou Y, Zhou M, Li Y, Tian T, Sun X, Chen M, Xu W, Lu M. Risk SNP-mediated LINC01614 upregulation drives head and neck squamous cell carcinoma progression via PI3K/AKT signaling pathway. Mol Carcinog 2022; 61:797-811. [PMID: 35687049 DOI: 10.1002/mc.23422] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 05/12/2022] [Accepted: 05/16/2022] [Indexed: 11/11/2022]
Abstract
As potential biomarkers and therapeutic targets, long noncoding RNAs (lncRNAs) are involved in the tumorigenesis of various tumors. Genetic variation in long noncoding regions can lead to lncRNA dysfunction and even cancer. Nevertheless, studies on the association between lncRNA-associated single-nucleotide polymorphisms (SNPs) and the risk of head and neck squamous cell carcinoma (HNSCC) remain inadequate. Here, we aimed to explore the association between SNPs in LINC01614 and HNSCC risk, and the potential role of LINC01614 in tumorigenesis. In this study, we found that rs16854802 A > G (odds ratio [OR] = 1.42, 95% confidence interval [CI]: 1.22-1.77, p < 0.001) and rs3113503 G > C (OR = 1.38, 95% CI: 1.15-1.64, p < 0.001) in LINC01614 increased the risk of HNSCC in the Chinese population. Functional bioinformatic analysis and luciferase reporter assay revealed that rs3113503 G > C variant disrupted the binding of miRNA-616-3p to LINC01614, which resulted in the increased expression of LINC01614. Further analysis of the TCGA database demonstrated that the upregulated LINC01614 in HNSCC cancer tissues was associated with poor prognostic in HNSCC patients. In vitro experiments showed that knockdown of LINC01614 inhibited the proliferation, invasion, and migration ability of HNSCC cells. Mechanistically, allele C of rs3113503 in LINC01614 was more effective than allele G in activating the PI3K/AKT signaling pathway. Moreover, the reduced expression of LINC01614 also inhibited the activation of the PI3K/AKT signaling pathway. In summary, our findings revealed that the risk SNP rs3113503 G > C in LINC01614 altered the binding to miR-616-3p, which led to increased LINC01614 expression and promoted HNSCC progression by activating the PI3K/AKT signaling pathway.
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Affiliation(s)
- Yaxuan Hou
- Department of Epidemiology and Biostatistics, and The Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Meng Zhou
- Department of Epidemiology and Biostatistics, and The Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuncheng Li
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tingting Tian
- Department of Epidemiology and Biostatistics, and The Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Xun Sun
- Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Mo Chen
- Department of Epidemiology and Biostatistics, and The Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Department of Guidance Center for Social Psychological Service, Wuhan Mental Health Center, Huazhong University of Science and Technology, Wuhan, China
| | - Wenmao Xu
- Department of Epidemiology and Biostatistics, and The Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Department of Public Health, Wuhan No. 1 Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Meixia Lu
- Department of Epidemiology and Biostatistics, and The Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Kong Y, Zhang X, Ma X, Wu L, Chen D, Su B, Liu D, Wang X. Silicon-substituted calcium phosphate promotes osteogenic-angiogenic coupling by activating the TLR4/PI3K/AKT signaling axis. J Biomater Appl 2022; 37:459-473. [PMID: 35623361 DOI: 10.1177/08853282221105303] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Silicon-substituted calcium phosphate (Si-CaP) is a promising bioactive material for bone tissue engineering. The mechanism of Si-CaP regulates osteogenic-angiogenic coupling during bone regeneration has not been fully elucidated. In this study, we screened the targets of Si-CaP and osteogenic-angiogenic coupling. 83 common genes were regarded as key targets for Si-CaP regulation of the osteogenic-angiogenic coupling. Then, we performed protein-protein interaction analysis, GO and KEGG enrichment analysis of these 83 targets to further predict their molecular mechanism. Our results showed that Si-CaP treatment could regulate the osteogenic-angiogenic coupling by up-regulating the expression of Toll-like receptor 4 (TLR4), and the phosphorylation of AKT which in turn activating the PI3K/AKT signaling pathway, promoting the expression of RUNX2, OPN, VEGF. In addition, we also found that TLR4 siRNA treatment could block the PI3K/AKT signaling pathway, while inhibiting the promoting effect of Si-CaP. However, although LY294002 can achieve the same inhibitory effect as TLR4 siRNA by blocking the PI3K/AKT signaling pathway, it could not affect the expression of TLR4. This indicates that TLR4 is an upstream activator of PI3K/AKT signaling pathway. These results are highly consistent with the prediction of bioinformatics. In conclusion, we have elucidated the role of TLR4/PI3K/AKT signaling axis in Si-CaP mediated osteogenic-angiogenic coupling for the first time. This study provides new data onto the regulatory role and molecular mechanism of Si-CaP in the process of osteogenic-angiogenic coupling, which strongly supports its wide application for bone tissue engineering.
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Affiliation(s)
- Yuanhang Kong
- 34707Department of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China.,Three authors contributed equally to this work as co-first author
| | - Xin Zhang
- 34707Department of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China.,Three authors contributed equally to this work as co-first author
| | - Xinnan Ma
- 34707Department of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China.,Three authors contributed equally to this work as co-first author
| | - Leilei Wu
- 34707Department of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Dechun Chen
- 34707Department of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Bo Su
- 34707Department of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Daqian Liu
- 34707Department of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Xintao Wang
- 34707Department of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
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Shi YJ, Sheng WJ, Xue MT, Duan FX, Shen L, Ding SQ, Wang QY, Wang R, Lü HZ, Hu JG. Effect of morroniside on the transcriptome profiles of rat in injured spinal cords. Gene 2022; 823:146338. [PMID: 35245640 DOI: 10.1016/j.gene.2022.146338] [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: 11/18/2021] [Revised: 01/16/2022] [Accepted: 02/11/2022] [Indexed: 12/27/2022]
Abstract
We have previously reported that morroniside promoted motor activity after spinal cord injury (SCI) in rats. However, the mechanism by which morroniside induces recovery of injured spinal cord (SC) remains unknown. In the current study, RNA sequencing (RNA-seq) was employed to evaluate changes of gene expressions at the transcriptional level of the injured spinal cords in morroniside-administrated rats. Principal component analysis, analysis of enriched Gene Ontology (GO), enrichment analyses Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway, and other bioinformatics analyses were executed to distinguish differentially expressed genes (DEGs). The results of RNA-seq confirmed the anti-inflammatory and anti-apoptotic effects of morroniside on injured SC tissues, and provided the basis for additional research of the mechanisms involving the protective effects of morroniside on SCI.
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Affiliation(s)
- Yu-Jiao Shi
- Department of Clinical Laboratory, The First Affiliated Hospital of Bengbu Medical College, 287 Chang Huai Road, Bengbu 233004, PR China; Anhui Key Laboratory of Tissue Transplantation, Bengbu Medical College, Bengbu 233004, PR China
| | - Wen-Jie Sheng
- Department of Clinical Laboratory, The First Affiliated Hospital of Bengbu Medical College, 287 Chang Huai Road, Bengbu 233004, PR China; Anhui Key Laboratory of Tissue Transplantation, Bengbu Medical College, Bengbu 233004, PR China
| | - Meng-Tong Xue
- Department of Clinical Laboratory, The First Affiliated Hospital of Bengbu Medical College, 287 Chang Huai Road, Bengbu 233004, PR China; Anhui Key Laboratory of Tissue Transplantation, Bengbu Medical College, Bengbu 233004, PR China
| | - Fei-Xiang Duan
- Department of Clinical Laboratory, The First Affiliated Hospital of Bengbu Medical College, 287 Chang Huai Road, Bengbu 233004, PR China; Anhui Key Laboratory of Tissue Transplantation, Bengbu Medical College, Bengbu 233004, PR China
| | - Lin Shen
- Anhui Key Laboratory of Tissue Transplantation, Bengbu Medical College, Bengbu 233004, PR China
| | - Shu-Qin Ding
- Department of Clinical Laboratory, The First Affiliated Hospital of Bengbu Medical College, 287 Chang Huai Road, Bengbu 233004, PR China; Anhui Key Laboratory of Tissue Transplantation, Bengbu Medical College, Bengbu 233004, PR China
| | - Qi-Yi Wang
- Department of Clinical Laboratory, The First Affiliated Hospital of Bengbu Medical College, 287 Chang Huai Road, Bengbu 233004, PR China
| | - Rui Wang
- Anhui Key Laboratory of Tissue Transplantation, Bengbu Medical College, Bengbu 233004, PR China
| | - He-Zuo Lü
- Department of Clinical Laboratory, The First Affiliated Hospital of Bengbu Medical College, 287 Chang Huai Road, Bengbu 233004, PR China; Anhui Key Laboratory of Tissue Transplantation, Bengbu Medical College, Bengbu 233004, PR China; Department of Immunology, Bengbu Medical College, Bengbu 233030, PR China.
| | - Jian-Guo Hu
- Department of Clinical Laboratory, The First Affiliated Hospital of Bengbu Medical College, 287 Chang Huai Road, Bengbu 233004, PR China; Anhui Key Laboratory of Tissue Transplantation, Bengbu Medical College, Bengbu 233004, PR China.
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Machine Learning-Based Integration Develops a Pyroptosis-Related lncRNA Model to Enhance the Predicted Value of Low-Grade Glioma Patients. JOURNAL OF ONCOLOGY 2022; 2022:8164756. [PMID: 35646114 PMCID: PMC9135526 DOI: 10.1155/2022/8164756] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 04/26/2022] [Indexed: 12/22/2022]
Abstract
Background Molecular features have been included in the categorization of gliomas because they may be excellent predictors of tumor prognosis. Lower-grade glioma (LGGs, which comprise grade 2 and grade 3 gliomas) patients have a wide variety of outcomes. The goal of this research is to investigate a pyroptosis-based long noncoding RNA (lncRNA) profile and see whether it can be used to predict LGG prognosis. Methods The Genotype-Tissue Expression (GTEx) and Cancer Genome Atlas (TCGA) datasets were utilized to get RNA data and clinical information for this research. Six considerably related lncRNAs (AL355574.1, AL355974.2, Z97989.1, SNAI3-AS1, LINC02593, and CYTOR) were selected using Cox regression (univariate and multivariate) and LASSO Cox regression. A variety of statistical techniques, including ROC curves, nomogram, and Kaplan-Meier curves, were utilized to verify the risk score's accuracy. Following that, bioinformatics studies were carried out to investigate the possible molecular processes that influence LGG prognosis. The variations in pathway enrichment were investigated using GSEA. The immune microenvironment inconsistencies were investigated using CIBERSORT, ESTIMATE, MCPcounter, TIMER algorithms, and ssGSEA. Results We discovered six lncRNAs with distinct expression patterns that are linked to LGG prognosis. Kaplan-Meier studies showed a signature of high-risk lncRNAs associated with a poor prognosis for LGG. Furthermore, the AUC of the lncRNA signature was 0.763, indicating that they may be used to predict LGG prognosis. In predicting LGG prognosis, our risk assessment approach outperformed conventional clinicopathological characteristics. In the high-risk group of people, GSEA identified tumor-related pathways and immune-related pathways. Furthermore, T cell-related activities such as T cell coinhibition and costimulation, check point, APC coinhibition and costimulation, CCR, and inflammatory promoting were shown to be substantially different between the two groups in TCGA analysis. Immune checkpoints including PD-1, CTLA4, and PD-L1 were expressed differentially in the two groups as well. Conclusion This study found that pyroptosis-based lncRNAs were useful in predicting LGG patients' survival, suggesting that they may be used as a therapeutic target in the future.
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Li Z, Bai H, Zhang R, Chen B, Wang J, Xue B, Ren X, Wang J, Jia Y, Zang W, Wang J, Chen X. Systematic analysis of critical genes and pathways identified a signature of neuropathic pain after spinal cord injury. Eur J Neurosci 2022; 56:3991-4008. [PMID: 35560852 DOI: 10.1111/ejn.15693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 03/21/2022] [Accepted: 03/26/2022] [Indexed: 11/28/2022]
Abstract
Spinal cord injury (SCI) damages sensory systems, producing chronic neuropathic pain that is resistant to medical treatment. The specific mechanisms underlying SCI-induced neuropathic pain (SCI-NP) remain unclear, and protein biomarkers have not yet been integrated into diagnostic screening. To better understand the host molecular pathways involved in SCI-NP, we used the bioinformatics method, the PubMed database, and bioinformatics methods to identify target genes and their associated pathways. We reviewed 2504 articles on the regulation of SCI-NP and used the text mining of PubMed database abstracts to determine associations among 12 pathways and networks. Based on this method, we identified two central genes in SCI-NP: interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α). Adult male Sprague-Dawley rats were used to build the SCI-NP models. The threshold for paw withdrawal was significantly reduced in the SCI group and TLR4 was activated in microglia after SCI. ELISA analysis of TNF-α and IL-6 levels was significantly higher in the SCI group than in the sham group. Western blot showed that expressions of the TLR4/MyD88/NF-κB inflammatory pathway protein increased dramatically in the SCI group. Using the TLR4 inhibitor TAK-242, the pain threshold and expressions of inflammatory factors and proteins of the proteins of the inflammatory signal pathway were reversed, TLR4 in microglia was suppressed, suggesting that SCI-NP was related to neuroinflammation mediated by the TLR4 signaling pathway. In conclusion, we found TNF-α and IL-6 were the neuroinflammation-related genes involved in SCI-NP that can be alleviated by inhibiting the inflammatory pathway upstream of the TLR4/MyD88/NF-κB inflammatory pathway.
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Affiliation(s)
- Zefu Li
- Department of Basic Medical College of Human Anatomy of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Huiying Bai
- Outpatient Surgery, Zhengzhou University Hospital, Zhengzhou, Henan Province, China
| | - Ruoyu Zhang
- Department of Basic Medical College of Human Anatomy of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Bohan Chen
- Department of Basic Medical College of Human Anatomy of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Junmin Wang
- Department of Basic Medical College of Human Anatomy of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Bohan Xue
- Department of Basic Medical College of Human Anatomy of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Xiuhua Ren
- Department of Basic Medical College of Human Anatomy of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Jiarui Wang
- The Johns Hopkins University, Baltimore, Maryland, USA
| | - Yanjie Jia
- Department of Neurology, the first affiliated Hospital Zhengzhou University, Zhengzhou, Henan Province, China
| | - Weidong Zang
- Department of Basic Medical College of Human Anatomy of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Jian Wang
- Department of Basic Medical College of Human Anatomy of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Xuemei Chen
- Department of Basic Medical College of Human Anatomy of Zhengzhou University, Zhengzhou, Henan Province, China
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Dietary Fatty Acid Regulation of the NLRP3 Inflammasome via the TLR4/NF-κB Signaling Pathway Affects Chondrocyte Pyroptosis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:3711371. [PMID: 35571243 PMCID: PMC9095358 DOI: 10.1155/2022/3711371] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Accepted: 04/12/2022] [Indexed: 11/18/2022]
Abstract
Dietary fatty acid (FA) content and type have different effects on obesity-associated osteoarthritis (OA), but the mechanisms underlying these differences are not fully understood. Inflammation activated by toll-like receptor 4 (TLR4)/nuclear factor- (NF-) κB signaling and pyroptosis induced by the NLRP3/caspase-1/gasdermin D (GSDMD) signaling pathway play important roles in OA development. Our aim in this study was to observe the effects of dietary FAs on the articular cartilage of obese post-traumatic OA model mice and on chondrocytes stimulated by lipopolysaccharide (LPS) and to determine whether the underlying mechanisms involve TLR4/NF-κB and NLRP3/caspase-1/GSDMD signaling pathways. Mice were fed high-fat diets rich in various FAs and underwent surgical destabilization of the medial meniscus to establish the obesity-related post-traumatic OA model. LPS-induced SW1353 chondrosarcoma cells were used to mimic OA status in vitro, and TLR4 inhibitors or TLR4 overexpressing lentivirus was administered. Analysis using weight-matched mice and multiple regression models revealed that OA was associated with dietary FA content and serum inflammatory factor levels, but not body weight. Diets rich in n-3 polyunsaturated fatty acids (PUFAs) attenuated OA and inhibited the TLR4/NF-κB and NLRP3/caspase-1/GSDMD signaling pathways, whereas diets rich in saturated fatty acids (SFAs), monounsaturated fatty acids (MUFAs), or n-6 PUFAs increased OA severity and activated these pathways. In vitro results for SFAs, n-6 PUFAs, and n-3 PUFAs were consistent with the animal experiments. However, those for MUFAs were not. FA effects on the NLRP3/caspase-1/GSDMD pathway were associated with the inhibition or activation of the TLR4 signaling pathway. In conclusion, diets rich in SFAs or n-6 PUFAs can exacerbate obesity-associated OA, whereas those rich in n-3 PUFAs have protective effects against this disease, due to their respective pro-/anti-inflammatory and pyroptotic effects. Further research on dietary FA supplements as a potential therapeutic approach for OA is needed.
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Mao C, Luan H, Gao S, Sheng W. Urolithin A as a Potential Drug for the Treatment of Spinal Cord Injuries: A Mechanistic Study Using Network Pharmacology Approaches. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2022; 2022:9090113. [PMID: 35497925 PMCID: PMC9054438 DOI: 10.1155/2022/9090113] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 01/08/2022] [Accepted: 03/21/2022] [Indexed: 02/08/2023]
Abstract
Objective This research was focused to examine the potential targets, action network, and mechanism of urolithin A (UA) in spinal cord injury (SCI) management exploiting the network pharmacology (NP). Methods We used the SwissTargetPrediction, PharmMapper, and TargetNet databases to obtain UA action targets. We searched the OMIM, GeneCards, CTD, and DrugBank databases to screen selected target genes for SCI treatment. The intersection of target genes between the UA and SCI databases was obtained by constructing Venn diagrams, which led to the identification of common druggable targets for the disease. The relationship network of the targets was built with Cytoscape 3.7.2, and the protein interaction network was analyzed with the STRING platform. The protein-protein interaction (PPI) network can be built on the STRING database. Gene Ontology (GO) function and KEGG pathway analyses of target intersections were completed with the DAVID 6.8 database. We constructed preliminary network targets for actions underlying UA-SCI interactions. Using the AutoDock software, we examined the molecular docking interactions between UA and its target proteins and further verified the mechanism of the action of UA. Results We obtained 318 UA drug targets and 1492 SCI disease targets. We identified a total of 118 common UA-SCI targets. Based on the PPI analysis, we identified MAPK1, SRC, AKT1, HRAS, MAPK8, HSP90AA1, MAPK14, JAK2, ESR1, and NF-κB1 as possible therapeutic targets. Enrichment analysis revealed that the PI3K-AKT, VEGF, and TNF signaling pathways could be critical for the NP analysis. Molecular docking indicated that UA had a strong affinity for docked proteins (binding energy range: -6.3 to -9.3 kcal mol-1). Conclusions We employed an NP approach to validate and predict the underlying mechanisms associated with UA therapy for SCI. An additional purpose of this study was to provide a theoretical basis for further experimental studies on UA's potential in SCI treatment.
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Affiliation(s)
- Chao Mao
- Department of Spine Surgery, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, China
| | - HaoPeng Luan
- Department of Spine Surgery, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, China
| | - ShuTao Gao
- Department of Spine Surgery, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, China
| | - WeiBin Sheng
- Department of Spine Surgery, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, China
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Xu J, Wang Q, Song YF, Xu XH, Zhu H, Chen PD, Ren YP. Long noncoding RNA X-inactive specific transcript regulates NLR family pyrin domain containing 3/caspase-1-mediated pyroptosis in diabetic nephropathy. World J Diabetes 2022; 13:358-375. [PMID: 35582664 PMCID: PMC9052004 DOI: 10.4239/wjd.v13.i4.358] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 01/24/2022] [Accepted: 03/17/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND NLRP3-mediated pyroptosis is recognized as an essential modulator of renal disease pathology. Long noncoding RNAs (lncRNAs) are active participators of diabetic nephropathy (DN). X inactive specific transcript (XIST) expression has been reported to be elevated in the serum of DN patients.
AIM To evaluate the mechanism of lncRNA XIST in renal tubular epithelial cell (RTEC) pyroptosis in DN.
METHODS A DN rat model was established through streptozotocin injection, and XIST was knocked down by tail vein injection of the lentivirus LV sh-XIST. Renal metabolic and biochemical indices were detected, and pathological changes in the renal tissue were assessed. The expression of indicators related to inflammation and pyroptosis was also detected. High glucose (HG) was used to treat HK2 cells, and cell viability and lactate dehydrogenase (LDH) activity were detected after silencing XIST. The subcellular localization and downstream mechanism of XIST were investigated. Finally, a rescue experiment was carried out to verify that XIST regulates NLR family pyrin domain containing 3 (NLRP3)/caspase-1-mediated RTEC pyroptosis through the microRNA-15-5p (miR-15b-5p)/Toll-like receptor 4 (TLR4) axis.
RESULTS XIST was highly expressed in the DN models. XIST silencing improved renal metabolism and biochemical indices and mitigated renal injury. The expression of inflammation and pyroptosis indicators was significantly increased in DN rats and HG-treated HK2 cells; cell viability was decreased and LDH activity was increased after HG treatment. Silencing XIST inhibited RTEC pyroptosis by inhibiting NLRP3/caspase-1. Mechanistically, XIST sponged miR-15b-5p to regulate TLR4. Silencing XIST inhibited TLR4 by promoting miR-15b-5p. miR-15b-5p inhibition or TLR4 overexpression averted the inhibitory effect of silencing XIST on HG-induced RTEC pyroptosis.
CONCLUSION Silencing XIST inhibits TLR4 by upregulating miR-15b-5p and ultimately inhibits renal injury in DN by inhibiting NLRP3/caspase-1-mediated RTEC pyroptosis.
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Affiliation(s)
- Jia Xu
- Department of Nephrology, Shenzhen University General Hospital, Shenzhen 518000, Guangdong Province, China
| | - Qin Wang
- Department of Nephrology, Shenzhen University General Hospital, Shenzhen 518000, Guangdong Province, China
| | - Yi-Fan Song
- Department of Nephrology, Shenzhen University General Hospital, Shenzhen 518000, Guangdong Province, China
| | - Xiao-Hui Xu
- Department of Nephrology, Shenzhen University General Hospital, Shenzhen 518000, Guangdong Province, China
| | - He Zhu
- Department of Nephrology, Shenzhen University General Hospital, Shenzhen 518000, Guangdong Province, China
| | - Pei-Dan Chen
- Department of Nephrology, Shenzhen University General Hospital, Shenzhen 518000, Guangdong Province, China
| | - Ye-Ping Ren
- Department of Nephrology, Shenzhen University General Hospital, Shenzhen 518000, Guangdong Province, China
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Gao L, Jiang Z, Han Y, Li Y, Yang X. Regulation of Pyroptosis by ncRNA: A Novel Research Direction. Front Cell Dev Biol 2022; 10:840576. [PMID: 35419365 PMCID: PMC8995973 DOI: 10.3389/fcell.2022.840576] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 03/14/2022] [Indexed: 01/17/2023] Open
Abstract
Pyroptosis is a novel form of programmed cell death (PCD), which is characterized by DNA fragmentation, chromatin condensation, cell swelling and leakage of cell contents. The process of pyroptosis is performed by certain inflammasome and executor gasdermin family member. Previous researches have manifested that pyroptosis is closely related to human diseases (such as inflammatory diseases) and malignant tumors, while the regulation mechanism of pyroptosis is not yet clear. Non-coding RNA (ncRNA) such as microRNA (miRNA), long non-coding RNA (lncRNA) and circular RNA (circRNA) have been widely identified in the genome of eukaryotes and played a paramount role in the development of cell function and fate after transcription. Accumulating evidences support the importance of ncRNA biology in the hallmarks of pyroptosis. However, the associations between ncRNA and pyroptosis are rarely reviewed. In this review, we are trying to summarize the regulation and function of ncRNA in cell pyroptosis, which provides a new research direction and ideas for the study of pyroptosis in different diseases.
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Affiliation(s)
- Liyuan Gao
- Zhangjiagang TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Suzhou, China
| | - Zhitao Jiang
- Zhangjiagang TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Suzhou, China
| | - Yi Han
- Zhangjiagang TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Suzhou, China
| | - Yang Li
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, China
| | - Xiang Yang
- Zhangjiagang TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Suzhou, China
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Yang B, Zhong W, Gu Y, Li Y. Emerging Mechanisms and Targeted Therapy of Pyroptosis in Central Nervous System Trauma. Front Cell Dev Biol 2022; 10:832114. [PMID: 35399534 PMCID: PMC8990238 DOI: 10.3389/fcell.2022.832114] [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: 12/09/2021] [Accepted: 02/14/2022] [Indexed: 01/31/2023] Open
Abstract
Cell death can occur in different modes, ferroptosis, pyroptosis, apoptosis, and necroptosis. Recent studies have shown that pyroptosis can be effectively regulated and that like necroptosis, pyroptosis has been regarded as a type of programmed cell death. The mechanism of its occurrence can be divided into canonical inflammasome-induced pyroptosis and noncanonical inflammasome-induced pyroptosis. In the past research, pyroptosis has been shown to be closely related to various diseases, such as tumors, neurodegenerative diseases, and central nervous system trauma, and studies have pointed out that in central nervous system trauma, pyroptosis is activated. Furthermore, these studies have shown that the inhibition of pyroptosis can play a role in protecting nerve function. In this review, we summarized the mechanisms of pyroptosis, introduce treatment strategies for targeted pyroptosis in central nervous system trauma, and proposed some issues of targeted pyroptosis in the treatment of central nervous system injury.
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Affiliation(s)
- Biao Yang
- Department of Neurosurgery, Ninth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, China
| | - Weijie Zhong
- Department of Neurosurgery, Ninth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ying Gu
- Department of Neurology, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
| | - Yi Li
- Department of Neurosurgery, Ninth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
- *Correspondence: Yi Li,
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Liu T, Li H, Li Y, Wang L, Chen G, Pu G, Guo X, Cho WC, Fasihi Harandi M, Zheng Y, Luo X. Integrative Analysis of RNA Expression and Regulatory Networks in Mice Liver Infected by Echinococcus multilocularis. Front Cell Dev Biol 2022; 10:798551. [PMID: 35399512 PMCID: PMC8989267 DOI: 10.3389/fcell.2022.798551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 02/17/2022] [Indexed: 11/13/2022] Open
Abstract
The larvae of Echinococcus multilocularis causes alveolar echinococcosis, which poses a great threat to the public health. However, the molecular mechanisms underlying the host and parasite interactions are still unclear. Exploring the transcriptomic maps of mRNA, miRNA and lncRNA expressed in the liver in response to E. multilocularis infection will help us to understand its pathogenesis. Using liver perfusion, different cell populations including the hepatic cells, hepatic stellate cells and Kupffer cells were isolated from mice interperitoneally inoculated with protoscoleces. Their transcriptional profiles including lncRNAs, miRNAs and mRNAs were done by RNA-seq. Among these cell populations, the most differentially-expressed (DE) mRNA, lncRNAs and miRNAs were annotated and may involve in the pathological processes, mainly including metabolic disorders, immune responses and liver fibrosis. Following the integrative analysis of 38 differentially-expressed DEmiRNAs and 8 DElncRNAs, the lncRNA-mRNA-miRNA networks were constructed, including F63-miR-223-3p-Fbxw7/ZFP36/map1b, F63-miR-27-5p-Tdrd6/Dip2c/Wdfy4 and IFNgAS1-IFN-γ. These results unveil the presence of several potential lncRNA-mRNA-miRNA axes during E. multilocularis infection, and further exploring of these axes may contribute to better understanding of the pathogenic mechanisms.
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Affiliation(s)
- Tingli Liu
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, CAAS, Lanzhou, China
| | - Hong Li
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, CAAS, Lanzhou, China
| | - Yanping Li
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, CAAS, Lanzhou, China
| | - Liqun Wang
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, CAAS, Lanzhou, China
| | - Guoliang Chen
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, CAAS, Lanzhou, China
| | - Guiting Pu
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, CAAS, Lanzhou, China
| | - Xiaola Guo
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, CAAS, Lanzhou, China
| | - William C. Cho
- Department of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong SAR, China
| | - Majid Fasihi Harandi
- Research Center for Hydatid Disease in Iran, Kerman University of Medical Sciences, Kerman, Iran
| | - Yadong Zheng
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, Zhejiang International Science and Technology Cooperation Base for Veterinary Medicine and Health Management, Zhejiang Provincial Engineering Laboratory for Animal Health Inspection and Internet Technology, Zhejiang International Science and Technology Cooperation Base for Veterinary Medicine and Health Management, China-Australia Joint Laboratory for Animal Health Big Data Analytics, College of Animal Science and Technology and College of Veterinary Medicine of Zhejiang A&F University, Hangzhou, China
- *Correspondence: Xuenong Luo, ; Yadong Zheng,
| | - Xuenong Luo
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, CAAS, Lanzhou, China
- *Correspondence: Xuenong Luo, ; Yadong Zheng,
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Yue M, Xiao L, Yan R, Li X, Yang W. Pyroptosis in neurodegenerative diseases: What lies beneath the tip of the iceberg? Int Rev Immunol 2022:1-16. [PMID: 35312447 DOI: 10.1080/08830185.2022.2052064] [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] [Indexed: 10/18/2022]
Abstract
Neurodegenerative diseases gradually receive attention with a rapidly aging global population. The hallmark of them is a progressive neuronal loss in the brain or peripheral nervous system due to complex reasons ranging from protein aggregation, immune dysregulation to abnormal cell death. The death style of nerve cell is no longer restricted to apoptosis, autophagy and necrosis as confirmed before. With the successive discoveries of the gasdermin (GSDM) protein family and key caspase molecules in the past several decades, pyroptosis emerges as a novel kind of programmed cell death. A substantial body of evidence has recognized the close connection between pyroptosis and the occurrence and development of neurodegenerative diseases. In this review, we summarize molecular mechanisms of pyroptosis, evidences for pyroptosis involvement in neurodegenerative diseases and finally we hope to provide a novel angle for clinical decision-making.
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Affiliation(s)
- Mengli Yue
- Department of Immunology, College of Basic Medical Sciences, JiLin University, Changchun City, Jilin Province, China
| | - Li Xiao
- Department of Immunology, College of Basic Medical Sciences, JiLin University, Changchun City, Jilin Province, China
| | - Rui Yan
- Department of Immunology, College of Basic Medical Sciences, JiLin University, Changchun City, Jilin Province, China
| | - Xinyi Li
- Department of Immunology, College of Basic Medical Sciences, JiLin University, Changchun City, Jilin Province, China
| | - Wei Yang
- Department of Immunology, College of Basic Medical Sciences, JiLin University, Changchun City, Jilin Province, China
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Zhou Z, Li C, Bao T, Zhao X, Xiong W, Luo C, Yin G, Fan J. Exosome-shuttled miR-672-5p from anti-inflammatory microglia repair traumatic spinal cord injury by inhibiting AIM2/ASC/Caspase-1 signaling pathway mediated neuronal pyroptosis. J Neurotrauma 2022; 39:1057-1074. [PMID: 35243913 DOI: 10.1089/neu.2021.0464] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Traumatic spinal cord injury (TSCI) is a devastating traumatic disease of the central nervous system, which leads to refractory loss of motor and sensory function. So far, there is no effective treatment for TSCI. Recently, however, nano-sized exosomes from various spinal cord cells have shown great prospects in the treatment of various diseases, including TSCI. Microglia are one of the components of the spinal cord microenvironment. Anti-inflammatory microglia (M2) have been shown to inhibit inflammation and promote the functional recovery of spinal cord after TSCI. However, the role micro RNAs (miRNAs) in exosomes derived from M2 microglia in the treatment of TSCI is unclear. In this study, we investigated whether M2 microglial exosomes (M2-Exos) could better promote the functional behavior recovery of mice with TSCI than M0 microglial exosomes (Exos). Compared with Exos, M2-Exos were found to have a better effect in promoting the recovery of functional behavior, promoting axon regeneration and reducing the level of pyroptosis of spinal cord neurons after TSCI. Through a series of experiments, we also confirmed that miR-672-5p is the most critical miRNA associated with M2-Exos, and that its targeting gene is AIM2. M2-Exos rich in miR-672-5p could inhibit the AIM2/ASC/Caspase-1 signaling pathway by inhibiting AIM2 activity, so as to inhibit neuronal pyroptosis and finally promote the recovery of functional behavior in mice with TSCI. In conclusion, our study suggests that the application of M2-Exos may be a promising treatment strategy for TSCI.
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Affiliation(s)
- Zheng Zhou
- Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, 74734, Department of Emergency Medicine, 300 Guangzhou Road, Nanjing 210029, Jiangsu Province, China, Nanjing, China, 210029;
| | - Cong Li
- Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, 74734, Department of Orthopaedics, Nanjing, Jiangsu, China;
| | - Tianyi Bao
- Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, 74734, Department of Orthopaedics, Nanjing, Jiangsu, China;
| | - Xuan Zhao
- Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, 74734, Department of Orthopaedics, Nanjing, Jiangsu, China;
| | - Wu Xiong
- Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, 74734, Department of Orthopaedics, Nanjing, Jiangsu, China;
| | - Chunyang Luo
- Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, 74734, Department of Emergency Medicine, Nanjing, Jiangsu, China;
| | - Guoyong Yin
- Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, 74734, Department of Orthopaedics, Nanjing, Jiangsu, China;
| | - Jin Fan
- Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, 74734, Department of Orthopaedics, Nanjing, Jiangsu, China;
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Li J, Huang J, Chen L, Ren W, Cai W. Human umbilical cord mesenchymal stem cells contribute to the reconstruction of bladder function after acute spinal cord injury via p38 mitogen-activated protein kinase/nuclear factor-kappa B pathway. Bioengineered 2022; 13:4844-4856. [PMID: 35152833 PMCID: PMC8973731 DOI: 10.1080/21655979.2022.2036397] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 01/24/2022] [Accepted: 01/25/2022] [Indexed: 02/05/2023] Open
Abstract
The association between spinal cord injury (SCI) and bladder symptoms has been intensively described. Human umbilical cord mesenchymal stem cell (hUC-MSC) treatment is beneficial to the recovery of bladder function after SCI, but its mechanism is unclear. We established an SCI model, and prepared hUC-MSCs in advance, followed by verification using flow cytometry. The Basso, Beattie and Bresnahan (BBB) score and urodynamic index were employed to evaluate motor function and bladder functions, respectively. Hematoxylin-eosin staining, luxol fast blue staining, and Masson's trichrome staining were utilized to assess pathological changes. Real-time quantitative PCR and Western blot were used to determine the mRNA and protein expressions in bladder tissues. The immunophenotypes of the HUC-MSCs were CD90+ and CD105+, but CD34-, CD45- and HLA-DR-. Rats appeared severe motor dysfunction after SCI, but the BBB score was increased in hUC-MSCs after the second week. Pathologically, the improvement of the lesion area on the dorsal spinal cord, augmented anterior gray horn neuron cells of the spinal cord and lessened bladder tissue remodeling (fibrosis, collagen deposition) as well as modulated inflammation could be observed. Besides, SCI increased bladder weight, bladder capacity, urine volume and residual urine volume, and decreased urination efficiency. HUC-MSCs ameliorated SCI-induced pathological changes and bladder functions, the expressions of Collagen I, Collagen III, fibroblast growth factor 2 (FGF2), phospho-p38, transient receptor potential vanilloid 1, Toll-like receptor 4 and phospho-nuclear factor-kappa B (p-NF-κB). To sum up, HUC-MSCs contribute to the reconstruction of bladder function after SCI by repressing p38 MAPK/NF-κB pathway.
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Affiliation(s)
- Jue Li
- Department of Nursing, Shenzhen Hospital, Southern Medical University, Shenzhen, Guangdong, 518101, P.R. China
- School of Nursing, Southern Medical University, Guangzhou, Guangdong, 510515, P.R. China
| | - Jiliang Huang
- Reproductive Center, The First Affiliated Hospital of Shantou University Medical College, Shantou, Guangzhou, Guangdong, 515041, P.R. China
| | - Ling Chen
- Department of Nursing, Shenzhen Hospital, Southern Medical University, Shenzhen, Guangdong, 518101, P.R. China
| | - Wei Ren
- Department of Nursing, Shenzhen Hospital, Southern Medical University, Shenzhen, Guangdong, 518101, P.R. China
| | - Wenzhi Cai
- Department of Nursing, Shenzhen Hospital, Southern Medical University, Shenzhen, Guangdong, 518101, P.R. China
- School of Nursing, Southern Medical University, Guangzhou, Guangdong, 510515, P.R. China
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82
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Zhou ZM, Bao JP, Peng X, Gao JW, VLF C, Zhang C, Sun R, Kun-Wang, Wu XT. Small extracellular vesicles from hypoxic mesenchymal stem cells alleviate intervertebral disc degeneration by delivering miR-17-5p. Acta Biomater 2022; 140:641-658. [PMID: 34879291 DOI: 10.1016/j.actbio.2021.11.044] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 11/25/2021] [Accepted: 11/30/2021] [Indexed: 12/23/2022]
Abstract
Minimally invasive repair strategies are a very promising approach for the treatment of intervertebral disc degeneration (IDD). In recent years, small extracellular vesicles (sEVs) secreted from mesenchymal stem cells (MSCs) have been shown great potential in alleviating IDD. However, in vitro experiments, MSCs are usually exposed to a normoxic micro-environment, which differs greatly from the hypoxic micro-environment in vivo. The primary purpose of our research was to determine whether sEVs isolated from MSCs under hypoxic status (H-sEVs) exhibit a more beneficial effect on protecting IDD compared with sEVs derived from MSCs under normoxic status (N-sEVs). A tail IDD rat model and a series of experiments in vitro were conducted to compare the beneficial effects of PBS, N-sEVs, and H-sEVs treatment. Then, to validate the role of sEVs miRNAs in IDD, a miRNA microarray sequencing analysis and a series of rescue experiments were conducted. Luciferase activity, RNA-ChIP and western blot were performed to explore the potential mechanisms. The results indicate that sEVs alleviate IDD by ameliorating the homeostatic imbalance between anabolism and catabolism in vivo and in vitro. Microarray sequencing result shows that miR-17-5p is maximally enriched in H-sEVs. Toll-like receptor 4 (TLR4) was determined to be a target downstream gene of miR-17-5p. Finally, it was found that H-sEVs miR-17-5p may modulate proliferation and synthesis of human nucleus pulposus cells (HNPCs) matrix via TLR4 pathway. In conclusion, H-sEVs miR-17-5p alleviate IDD via promoting HNPCs matrix proliferation and synthesis, providing new therapeutic targets for IDD. STATEMENT OF SIGNIFICANCE: Intervertebral disc degeneration (IDD) is the primary cause of low back pain (LBP), which is a huge burden to society. Our research demonstrates for the first time that hypoxic pretreatment of small extracellular vesicles (H-sEVs) effectively alleviated the progress of IDD. In short, in the present research, we found that H-sEVs miR-17-5p could modulate proliferation and synthesis of nucleus pulposus cells (NPCs) matrix via TLR4/PI3K/AKT pathway. Therefore, hypoxic pre-treatment is a prospective and efficient method to optimize the therapeutic effect of MSCs-derived sEVs. miRNA and MSCs-derived sEVs combination may be a promising therapeutic approach for IDD.
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Xing Z, Liu Z, Fu X, Zhou S, Liu L, Dang Q, Guo C, Ge X, Lu T, Zheng Y, Dai L, Han X, Wang X. Clinical Significance and Immune Landscape of a Pyroptosis-Derived LncRNA Signature for Glioblastoma. Front Cell Dev Biol 2022; 10:805291. [PMID: 35223836 PMCID: PMC8866949 DOI: 10.3389/fcell.2022.805291] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Accepted: 01/12/2022] [Indexed: 01/15/2023] Open
Abstract
Introduction: Pyroptosis was recently implicated in the initiation and progression of tumors, including glioblastoma (GBM). This study aimed to explore the clinical significance of pyroptosis-related lncRNAs (PRLs) in GBM. Methods: Three independent cohorts were retrieved from the TCGA and CGGA databases. The consensus clustering and weighted gene coexpression network analysis (WGCNA) were applied to identify PRLs. The LASSO algorithm was employed to develop and validate a pyroptosis-related lncRNA signature (PRLS) in three independent cohorts. The molecular characteristics, clinical significances, tumor microenvironment, immune checkpoints profiles, and benefits of chemotherapy and immunotherapy regarding to PRLS were also explored. Results: In the WGCNA framework, a key module that highly correlated with pyroptosis was extracted for identifying PRLs. Univariate Cox analysis further revealed the associations between PRLs and overall survival. Based on the expression profiles of PRLs, the PRLS was initially developed in TCGA cohort (n = 143) and then validated in two CGGA cohorts (n = 374). Multivariate Cox analysis demonstrated that our PRLS model was an independent risk factor. More importantly, this signature displayed a stable and accurate performance in predicting prognosis at 1, 3, and 5 years, with all AUCs above 0.7. The decision curve analysis also indicated that our signature had promising clinical application. In addition, patients with high PRLS score suggested a more abundant immune infiltration, higher expression of immune checkpoint genes, and better response to immunotherapy but worse to chemotherapy. Conclusion: A novel pyroptosis-related lncRNA signature with a robust performance was constructed and validated in multiple cohorts. This signature provided new perspectives for clinical management and precise treatments of GBM.
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Affiliation(s)
- Zhe Xing
- Department of Neurosurgery, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Henan International Joint Laboratory of Glioma Metabolism and Microenvironment Research, Zhengzhou, China
| | - Zaoqu Liu
- Department of Interventional Radiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xudong Fu
- Department of Neurosurgery, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Henan International Joint Laboratory of Glioma Metabolism and Microenvironment Research, Zhengzhou, China
| | - Shaolong Zhou
- Department of Neurosurgery, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Henan International Joint Laboratory of Glioma Metabolism and Microenvironment Research, Zhengzhou, China
| | - Long Liu
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Qin Dang
- Department of Colorectal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Chunguang Guo
- Department of Endovascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xiaoyong Ge
- Department of Interventional Radiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Taoyuan Lu
- Department of Cerebrovascular Disease, Zhengzhou University People’s Hospital, Zhengzhou, China
| | - Youyang Zheng
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Lirui Dai
- Department of Neurosurgery, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Henan International Joint Laboratory of Glioma Metabolism and Microenvironment Research, Zhengzhou, China
| | - Xinwei Han
- Department of Interventional Radiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Correspondence: Xinjun Wang, ; Xinwei Han,
| | - Xinjun Wang
- Department of Neurosurgery, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Henan International Joint Laboratory of Glioma Metabolism and Microenvironment Research, Zhengzhou, China
- Correspondence: Xinjun Wang, ; Xinwei Han,
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84
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Zhou C, Zheng J, Fan Y, Wu J. TI: NLRP3 Inflammasome-Dependent Pyroptosis in CNS Trauma: A Potential Therapeutic Target. Front Cell Dev Biol 2022; 10:821225. [PMID: 35186932 PMCID: PMC8847380 DOI: 10.3389/fcell.2022.821225] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 01/03/2022] [Indexed: 12/22/2022] Open
Abstract
Central nervous system (CNS) trauma, including traumatic brain injury (TBI) and traumatic spinal cord injury (SCI), is characterized by high morbidity, disability, and mortality. TBI and SCI have similar pathophysiological mechanisms and are often accompanied by serious inflammatory responses. Pyroptosis, an inflammation-dependent programmed cell death, is becoming a major problem in CNS post-traumatic injury. Notably, the pyrin domain containing 3 (NLRP3) inflammasome is a key protein in the pyroptosis signaling pathway. Therefore, underlying mechanism of the NLRP3 inflammasome in the development of CNS trauma has attracted much attention. In this review, we briefly summarize the molecular mechanisms of NLRP3 inflammasome in pyroptosis signaling pathway, including its prime and activation. Moreover, the dynamic expression pattern, and roles of the NLRP3 inflammasome in CNS post-traumatic injury are summarized. The therapeutic applications of NLRP3 inflammasome activation inhibitors are also discussed.
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Affiliation(s)
- Conghui Zhou
- The First Affiliated Hospital of Zhejiang University, School of Medicine, Zhejiang University, Hangzhou, China
| | - Jinfeng Zheng
- The First Affiliated Hospital of Zhejiang University, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yunpeng Fan
- The First Affiliated Hospital of Zhejiang University, School of Medicine, Zhejiang University, Hangzhou, China
| | - Junsong Wu
- Department of Orthopaedics of the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- *Correspondence: Junsong Wu,
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85
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Li J, Zhang L, Wang J, Jia R, Zhang X, Li X, Fu Y, Song L. Differential expression of long non-coding RNAs in the hippocampus of mice exposed to PM 2.5 in Dalian, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:12136-12146. [PMID: 34561797 DOI: 10.1007/s11356-021-16496-5] [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: 01/08/2021] [Accepted: 09/07/2021] [Indexed: 06/13/2023]
Abstract
Evidence is mounting that PM2.5 exposure could lead to learning disability, memory deficits, and cognitive impairment; however, the underlying mechanisms are still not well demonstrated yet. Long non-coding RNAs (LncRNAs) play a crucial role in many human diseases. Although the relationship of Alzheimer's disease (AD) and lncRNAs have been discovered, the role of lncRNA in AD-like phenotype induced by PM2.5 needs further exploration. In this study, we profiled the expression of messenger RNAs (mRNAs) and lncRNAs in hippocampus after confirming the AD-like changes in mice. Compared with the control group, a total of 478 mRNAs and 151 lncRNAs were dysregulated after PM2.5 exposure. ECM-receptor interaction, focal adhesion, complement and coagulation cascades, and AGE-RAGE signaling pathway were found dysregulated through lncRNA-co-expressed genes analysis based on the Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG). Meanwhile, the genes related to microglia were significantly altered, such as CX3CR1, CD163, lncRNA Gm44750, and lncRNA Gm43509. Above evidences suggested that microglia-related lncRNAs dysregulation probably plays a crucial role in PM2.5exposure-associated learning and memory deficits.
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Affiliation(s)
- Jie Li
- College of Medical Laboratory, Dalian Medical University, Dalian, 116044, Liaoning Province, People's Republic of China
| | - Longying Zhang
- Department of Clinical Laboratory, Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, Liaoning Province, People's Republic of China
| | - Jiaqi Wang
- College of Medical Laboratory, Dalian Medical University, Dalian, 116044, Liaoning Province, People's Republic of China
- The First Affiliated Hospital, Jinzhou Medical University, Jinzhou, 121000, Liaoning Province, People's Republic of China
| | - Ruxue Jia
- College of Medical Laboratory, Dalian Medical University, Dalian, 116044, Liaoning Province, People's Republic of China
| | - Xiao Zhang
- College of Medical Laboratory, Dalian Medical University, Dalian, 116044, Liaoning Province, People's Republic of China
| | - Xiaojing Li
- College of Medical Laboratory, Dalian Medical University, Dalian, 116044, Liaoning Province, People's Republic of China
| | - Ying Fu
- College of Medical Laboratory, Dalian Medical University, Dalian, 116044, Liaoning Province, People's Republic of China
| | - Laiyu Song
- College of Medical Laboratory, Dalian Medical University, Dalian, 116044, Liaoning Province, People's Republic of China.
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86
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Focus on the Mechanisms and Functions of Pyroptosis, Inflammasomes, and Inflammatory Caspases in Infectious Diseases. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:2501279. [PMID: 35132346 PMCID: PMC8817853 DOI: 10.1155/2022/2501279] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 12/28/2021] [Indexed: 12/17/2022]
Abstract
Eukaryotic cells can initiate several distinct self-destruction mechanisms to display essential roles for the homeostasis maintenance, development, and survival of an organism. Pyroptosis, a key response mode in innate immunity, also referred to as caspase-1-dependent proinflammatory programmed necrotic cell death activated by human caspase-1/4/5, or mouse caspase-1/11, plays indispensable roles in response to cytoplasmic insults and immune defense against infectious diseases. These inflammatory caspases are employed by the host to eliminate pathogen infections such as bacteria, viruses, protozoans, and fungi. Gasdermin D requires to be cleaved and activated by these inflammatory caspases to trigger the pyroptosis process. Physiological rupture of cells results in the release of proinflammatory cytokines, the alarmins IL-1β and IL-18, symbolizing the inflammatory potential of pyroptosis. Moreover, long noncoding RNAs play direct or indirect roles in the upstream of the pyroptosis trigger pathway. Here, we review in detail recently acquired insights into the central roles of inflammatory caspases, inflammasomes, and pyroptosis, as well as the crosstalk between pyroptosis and long noncoding RNAs in mediating infection immunity and pathogen clearance.
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87
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METTL14 promotes apoptosis of spinal cord neurons by inducing EEF1A2 m6A methylation in spinal cord injury. Cell Death Dis 2022; 8:15. [PMID: 35013140 PMCID: PMC8748977 DOI: 10.1038/s41420-021-00808-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 11/12/2021] [Accepted: 12/14/2021] [Indexed: 12/31/2022]
Abstract
Spinal cord injury (SCI) is a devastating traumatic condition. METTL14-mediated m6A modification is associated with SCI. This study was intended to investigate the functional mechanism of RNA methyltransferase METTL14 in spinal cord neuron apoptosis during SCI. The SCI rat model was established, followed by evaluation of pathological conditions, apoptosis, and viability of spinal cord neurons. The neuronal function of primary cultured spinal motoneurons of rats was assessed after hypoxia/reoxygenation treatment. Expressions of EEF1A2, Akt/mTOR pathway-related proteins, inflammatory cytokines, and apoptosis-related proteins were detected. EEF1A2 was weakly expressed and Akt/mTOR pathway was inhibited in SCI rat models. Hypoxia/Reoxygenation decreased the viability of spinal cord neurons, promoted LDH release and neuronal apoptosis. EEF1A2 overexpression promoted the viability of spinal cord neurons, inhibited neuronal apoptosis, and decreased inflammatory cytokine levels. Silencing METTL14 inhibited m6A modification of EEF1A2 and increased EEF1A2 expression while METTL14 overexpression showed reverse results. EEF1A2 overexpression promoted viability and inhibited apoptosis of spinal cord neurons and inflammation by activating the Akt/mTOR pathway. In conclusion, silencing METTL14 repressed apoptosis of spinal cord neurons and attenuated SCI by inhibiting m6A modification of EEF1A2 and activating the Akt/mTOR pathway.
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88
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Chen JN, Zhang YN, Tian LG, Zhang Y, Li XY, Ning B. Down-regulating Circular RNA Prkcsh suppresses the inflammatory response after spinal cord injury. Neural Regen Res 2022; 17:144-151. [PMID: 34100450 PMCID: PMC8451560 DOI: 10.4103/1673-5374.314114] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Circular RNAs (circRNAs) are a class of conserved, endogenous non-coding RNAs that are involved in transcriptional and post-transcriptional gene regulation and are highly enriched in the nervous system. They participate in the survival and differentiation of multiple nerve cells, and may even promote the recovery of neurological function after stroke. However, their role in the inflammatory response after spinal cord injury remains unclear. In the present study, we established a mouse model of T9 spinal cord injury using the modified Allen’s impact method, and identified 16,013 circRNAs and 960 miRNAs that were differentially expressed after spinal cord injury. Of these, the expression levels of circPrkcsh were significantly different between injured and sham-treated mice. We then treated astrocytes with tumor necrosis factor-α in vitro to simulate the inflammatory response after spinal cord injury. Our results revealed an elevated expression of circPrkcsh with a concurrent decrease in miR-488 expression in injured cells. We also found that circPrkcsh regulated the expression of the inflammation-related gene Ccl2. Furthermore, in tumor necrosis factor-α-treated astrocytes, circPrkcsh knockdown decreased the expression of Ccl2 by upregulating miR-488 expression, and reduced the secretion of inflammatory cytokines in vitro. These findings suggest that differentially expressed circRNAs participate in the inflammatory response after spinal cord injury and act as the regulators of certain microRNAs. Furthermore, circPrkcsh may be used as an miR-488 sponge to regulate Ccl2 expression, which might provide a new potential therapy for SCI. The study was approved by the Animal Ethics Committee of Shandong University of China (approval No. KYLL-20170303) on March 3, 2017.
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Affiliation(s)
- Jia-Nan Chen
- Department of Orthopedics, Jinan Central Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong Province, China
| | - Yi-Ning Zhang
- Department of Orthopedics, Central Hospital Affiliated to Shandong First Medical University, Jinan, Shandong Province, China
| | - Li-Ge Tian
- Department of Orthopedics, Jinan Central Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong Province, China
| | - Ying Zhang
- Department of Orthopedics, Jinan Central Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong Province, China
| | - Xin-Yu Li
- Department of Orthopedics, Jinan Central Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong Province, China
| | - Bin Ning
- Department of Orthopedics, Jinan Central Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong Province, China
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89
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Sun Y, Zhu X, Zhu K, Yu J, Cheng L, Hei M. High-mobility Group Box 1 Contributes to Hypoxic-Ischemic Brain Damage by Facilitating Imbalance of Microglial Polarization through RAGE-PI3K/Akt Pathway in Neonatal Rats. Int J Med Sci 2022; 19:2093-2103. [PMID: 36483598 PMCID: PMC9724240 DOI: 10.7150/ijms.78641] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Accepted: 11/03/2022] [Indexed: 11/24/2022] Open
Abstract
High mobility group box 1 (HMGB1) is a damage-associated molecular pattern integral for hypoxic-ischemic brain damage (HIBD) in neonatal rats since it regulates the phenotypic polarization of microglia, as depicted in our previous studies. Since this mechanism is not clear, this study establishes an oxygen-glucose deprivation (OGD) model of highly aggressively proliferating immortalized microglia while modulating the expression of HMGB1 by plasmid transfection. The M1/M2 microglial phenotype and receptor for advanced glycation end products-phosphoinositide 3-kinase/Akt (RAGE-PI3K/Akt) activation were evaluated, showing that HMGB1 promoted the polarization of microglia to the M1 phenotype under OGD conditions. Meanwhile, RAGE, which is the main receptor of HMGB1, was activated, and phosphorylation of PI3K/Akt was upregulated. However, knockdown or inhibition of HMGB1 can weaken the activation of RAGE and phosphorylation of PI3K/Akt. The inhibition of HMGB1 or RAGE-PI3K/Akt attenuated microglial polarization to the M1 phenotype and promoted M2 microglial polarization instead, reducing the release of pro-inflammatory factors. In the neonatal HIBD rat model, the RAGE-PI3K/Akt pathway was activated seven days after hypoxic-ischemic (HI) exposure, and the activation was partly inhibited after pretreatment with the HMGB1 inhibitor. Concurrently, inhibition of the HMGB1-RAGE-PI3K/Akt pathway alleviated neuronal damage in the hippocampus. These findings verified that HMGB1 could lead to an imbalance in M1/M2 microglial polarization through activation of the RAGE-PI3K/Akt signaling pathway under OGD conditions. Obstructing this pathway may attenuate the imbalanced polarization of microglia, enabling its utilization as a therapeutic strategy against brain injury in HIBD.
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Affiliation(s)
- Yanyan Sun
- Department of Hematology, Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, Henan, 450000, China.,Department of Neonatology, Neonatal Center, Beijing Children's Hospital, Capital Medical University, Beijing, 100045, China
| | - Xing Zhu
- Department of Neonatology, Neonatal Center, Beijing Children's Hospital, Capital Medical University, Beijing, 100045, China.,National Center for Child Health, Beijing, 100045, China
| | - Kaiyi Zhu
- Department of Neonatology, Neonatal Center, Beijing Children's Hospital, Capital Medical University, Beijing, 100045, China.,National Center for Child Health, Beijing, 100045, China
| | - Jie Yu
- Department of Neonatology, Neonatal Center, Beijing Children's Hospital, Capital Medical University, Beijing, 100045, China.,National Center for Child Health, Beijing, 100045, China
| | - Lin Cheng
- Department of Neonatology, Neonatal Center, Beijing Children's Hospital, Capital Medical University, Beijing, 100045, China.,National Center for Child Health, Beijing, 100045, China
| | - Mingyan Hei
- Department of Neonatology, Neonatal Center, Beijing Children's Hospital, Capital Medical University, Beijing, 100045, China.,National Center for Child Health, Beijing, 100045, China.,Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing, 100045, China
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90
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Chu E, Mychasiuk R, Hibbs ML, Semple BD. Dysregulated phosphoinositide 3-kinase signaling in microglia: shaping chronic neuroinflammation. J Neuroinflammation 2021; 18:276. [PMID: 34838047 PMCID: PMC8627624 DOI: 10.1186/s12974-021-02325-6] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Accepted: 11/15/2021] [Indexed: 12/15/2022] Open
Abstract
Microglia are integral mediators of innate immunity within the mammalian central nervous system. Typical microglial responses are transient, intending to restore homeostasis by orchestrating the removal of pathogens and debris and the regeneration of damaged neurons. However, prolonged and persistent microglial activation can drive chronic neuroinflammation and is associated with neurodegenerative disease. Recent evidence has revealed that abnormalities in microglial signaling pathways involving phosphatidylinositol 3-kinase (PI3K) and protein kinase B (AKT) may contribute to altered microglial activity and exacerbated neuroimmune responses. In this scoping review, the known and suspected roles of PI3K-AKT signaling in microglia, both during health and pathological states, will be examined, and the key microglial receptors that induce PI3K-AKT signaling in microglia will be described. Since aberrant signaling is correlated with neurodegenerative disease onset, the relationship between maladapted PI3K-AKT signaling and the development of neurodegenerative disease will also be explored. Finally, studies in which microglial PI3K-AKT signaling has been modulated will be highlighted, as this may prove to be a promising therapeutic approach for the future treatment of a range of neuroinflammatory conditions.
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Affiliation(s)
- Erskine Chu
- Department of Immunology and Pathology, Central Clinical School, Monash University, Level 6, 89 Commercial Road, Melbourne, VIC, 3004, Australia
- Department of Neuroscience, Central Clinical School, Monash University, Level 6, 99 Commercial Road, Melbourne, VIC, 3004, Australia
| | - Richelle Mychasiuk
- Department of Neuroscience, Central Clinical School, Monash University, Level 6, 99 Commercial Road, Melbourne, VIC, 3004, Australia
- Department of Neurology, Alfred Health, Prahran, VIC, 3181, Australia
| | - Margaret L Hibbs
- Department of Immunology and Pathology, Central Clinical School, Monash University, Level 6, 89 Commercial Road, Melbourne, VIC, 3004, Australia.
| | - Bridgette D Semple
- Department of Neuroscience, Central Clinical School, Monash University, Level 6, 99 Commercial Road, Melbourne, VIC, 3004, Australia.
- Department of Neurology, Alfred Health, Prahran, VIC, 3181, Australia.
- Department of Medicine (Royal Melbourne Hospital), The University of Melbourne, Parkville, VIC, 3050, Australia.
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91
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Hu Y, Wang B, Li S, Yang S. Pyroptosis, and its Role in Central Nervous System Disease. J Mol Biol 2021; 434:167379. [PMID: 34838808 DOI: 10.1016/j.jmb.2021.167379] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 11/16/2021] [Accepted: 11/20/2021] [Indexed: 02/07/2023]
Abstract
Pyroptosis is an inflammatory form of cell death executed by transmembrane pore-forming proteins known as gasdermins and can be activated in an inflammasome-dependent or -independent manner. Inflammasome-dependent pyroptosis is triggered in response to pathogen-associated molecular patterns (PAMPs) or damage-associated molecular patterns (DAMPs) and has emerged as an important player in the pathogenesis of multiple inflammatory diseases, mainly by releasing inflammatory contents. More recently, numerous studies have revealed the intricate mechanisms of pyroptosis and its role in the development of neuroinflammation in central nervous system (CNS) diseases. In this review, we summarize current understandings of the molecular and regulatory mechanisms of pyroptosis. In addition, we discuss how pyroptosis can drive different forms of neurological diseases and new promising therapeutic strategies targeting pyroptosis that can be leveraged to treat neuroinflammation.
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Affiliation(s)
- Yingchao Hu
- Department of Immunology, Key Laboratory of Immunological Environment and Disease, Gusu School, State Key Laboratory of Reproductive Medicine, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Personalized Cancer Medicine, Center for Global Health, Nanjing Medical University, Nanjing 211166, China
| | - Bingwei Wang
- Department of Pharmacology, Nanjing University of Chinese Medicine, Nanjing, China.
| | - Sheng Li
- Department of Neurology, Affiliated Brain Hospital of Nanjing Medical University, Nanjing, China.
| | - Shuo Yang
- Department of Immunology, Key Laboratory of Immunological Environment and Disease, Gusu School, State Key Laboratory of Reproductive Medicine, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Personalized Cancer Medicine, Center for Global Health, Nanjing Medical University, Nanjing 211166, China.
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92
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Liu J, He J, Huang Y, Ge L, Xiao H, Zeng L, Jiang Z, Lu M, Hu Z. Hypoxia-preconditioned mesenchymal stem cells attenuate microglial pyroptosis after intracerebral hemorrhage. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:1362. [PMID: 34733914 PMCID: PMC8506532 DOI: 10.21037/atm-21-2590] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 07/14/2021] [Indexed: 01/01/2023]
Abstract
Background Microglia plays a vital role in neuroinflammation, contributing to the pathogenesis of intracerebral hemorrhage (ICH)-induced brain injury. Mesenchymal stem cells (MSCs) hold great potential for treating ICH. We previously revealed that MSCs ameliorate the microglial pyroptosis caused by an ischemic stroke. However, whether MSCs can modulate microglial pyroptosis after ICH remains unknown. This study aimed to investigate the neuroprotective effects of hypoxia-preconditioned olfactory mucosa MSCs (OM-MSCs) on ICH and the possible mechanisms. Methods ICH was induced in mice via administration of collagenase IV. At 6 h post-ICH, 2-4×105 normoxic/hypoxic OM-MSCs or saline were intracerebrally administered. To evaluate the neuroprotective effects, the behavioral outcome, apoptosis, and neuronal injury were measured. Microglia activation and pro-inflammatory cytokines were applied to detect neuroinflammation. Microglial pyroptosis was determined by western blotting, immunofluorescence staining, and transmission electron microscopy (TEM). Results The two OM-MSC-transplanted groups exhibited significantly improved functional recovery and reduced neuronal injury, especially the hypoxic OM-MSCs group. Hypoxic OM-MSCs attenuated microglial activation as well as the levels of interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α). Moreover, we found that hypoxia-preconditioned OM-MSCs ameliorated pyroptosis by diminishing the levels of pyroptosis-associated proteins in peri-hematoma brain tissues, decreasing the expression of the microglial nod-like receptor family protein 3 (NLRP3) and caspase-1, and reducing the membrane pores on microglia post-ICH. Conclusions Our study showed that hypoxic preconditioning augments the therapeutic efficacy of OM-MSCs, and hypoxia-preconditioned OM-MSCs alleviate microglial pyroptosis in the ICH model.
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Affiliation(s)
- Jianyang Liu
- Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, China
| | - Jialin He
- Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, China
| | - Yan Huang
- National Health Commission Key Laboratory of Birth Defects Research, Prevention, and Treatment, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, China
| | - Lite Ge
- Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, China
| | - Han Xiao
- Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, China
| | - Liuwang Zeng
- Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, China
| | - Zheng Jiang
- Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, China
| | - Ming Lu
- Developmental Biology of Ministry of Education, College of Life Sciences, Hunan Normal University, Changsha, China.,Hunan Provincial Key Laboratory of Neurorestoratology, Second Affiliated Hospital of Hunan Normal University, Changsha, China
| | - Zhiping Hu
- Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, China
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93
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Chen M, Lai X, Wang X, Ying J, Zhang L, Zhou B, Liu X, Zhang J, Wei G, Hua F. Long Non-coding RNAs and Circular RNAs: Insights Into Microglia and Astrocyte Mediated Neurological Diseases. Front Mol Neurosci 2021; 14:745066. [PMID: 34675776 PMCID: PMC8523841 DOI: 10.3389/fnmol.2021.745066] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 09/14/2021] [Indexed: 02/05/2023] Open
Abstract
Microglia and astrocytes maintain tissue homeostasis in the nervous system. Both microglia and astrocytes have pro-inflammatory phenotype and anti-inflammatory phenotype. Activated microglia and activated astrocytes can contribute to several neurological diseases. Long non-coding RNAs (lncRNAs) and circular RNAs (circRNAs), two groups of non-coding RNAs (ncRNAs), can function as competing endogenous RNAs (ceRNAs) to impair the microRNA (miRNA) inhibition on targeted messenger RNAs (mRNAs). LncRNAs and circRNAs are involved in various neurological disorders. In this review, we summarized that lncRNAs and circRNAs participate in microglia dysfunction, astrocyte dysfunction, neuron damage, and inflammation. Thereby, lncRNAs and circRNAs can positively or negatively regulate neurological diseases, including spinal cord injury (SCI), traumatic brain injury (TBI), ischemia-reperfusion injury (IRI), stroke, neuropathic pain, epilepsy, Parkinson’s disease (PD), multiple sclerosis (MS), and Alzheimer’s disease (AD). Besides, we also found a lncRNA/circRNA-miRNA-mRNA regulatory network in microglia and astrocyte mediated neurological diseases. Through this review, we hope to cast light on the regulatory mechanisms of lncRNAs and circRNAs in microglia and astrocyte mediated neurological diseases and provide new insights for neurological disease treatment.
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Affiliation(s)
- Miaomiao Chen
- Department of Anesthesiology, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Key Laboratory of Anesthesiology of Jiangxi Province, Nanchang, China.,First Clinical Medical College, Nanchang University, Nanchang, China
| | - Xingning Lai
- Department of Anesthesiology, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, China
| | - Xifeng Wang
- Department of Anesthesiology, the First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Jun Ying
- Department of Anesthesiology, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Key Laboratory of Anesthesiology of Jiangxi Province, Nanchang, China
| | - Lieliang Zhang
- Department of Anesthesiology, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Key Laboratory of Anesthesiology of Jiangxi Province, Nanchang, China
| | - Bin Zhou
- Department of Anesthesiology, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Key Laboratory of Anesthesiology of Jiangxi Province, Nanchang, China
| | - Xing Liu
- Department of Anesthesiology, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Key Laboratory of Anesthesiology of Jiangxi Province, Nanchang, China
| | - Jing Zhang
- Department of Anesthesiology, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Key Laboratory of Anesthesiology of Jiangxi Province, Nanchang, China
| | - Gen Wei
- Department of Anesthesiology, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Key Laboratory of Anesthesiology of Jiangxi Province, Nanchang, China
| | - Fuzhou Hua
- Department of Anesthesiology, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Key Laboratory of Anesthesiology of Jiangxi Province, Nanchang, China
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94
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Nie H, Jiang Z. Bone mesenchymal stem cell-derived extracellular vesicles deliver microRNA-23b to alleviate spinal cord injury by targeting toll-like receptor TLR4 and inhibiting NF-κB pathway activation. Bioengineered 2021; 12:8157-8172. [PMID: 34663169 PMCID: PMC8806461 DOI: 10.1080/21655979.2021.1977562] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Bone mesenchymal stem cell-derived extracellular vesicles (BMSC-EVs) are known for recovery of injured tissues. We investigated the possible mechanism of BMSC-EVs in spinal cord injury (SCI). EVs were isolated from BMSCs and injected into SCI rats to evaluate the recovery of hindlimb motor function. The spinal cord tissue was stained after modeling to analyze spinal cord structure and inflammatory cell infiltration and detect microRNA (miR)-23b expression. The activity of lipopolysaccharide (LPS)-induced BV2 inflammatory cells was detected. The protein contents of interleukin (IL)-6, IL-1β, IL-10 and tumor necrosis factor-α (TNF-α) in spinal cord and BV2 cells were measured. Western blot analysis was used to detect the level of toll-like receptor (TLR)4, p65, p-p65, iNOS, and Arg1 in spinal cord tissue and cells. TLR4 was overexpressed in rats and cells to evaluate the content of inflammatory cytokines. After EV treatment, the motor function of SCI rats was improved, SCI was relieved, and miR-23b expression was increased. After treatment with EV-miR-23b, iNOS, IL-6, IL-1β, and TNF-α contents were decreased, while Arg1 and IL-10 were increased. The levels of TLR4 and p-p65 in spinal cord and BV2 cells were decreased. The rescue experiments verified that after overexpression of TLR4, the activity of BV2 cells was decreased, the contents of IL-6, IL-1β, TNF-α, and p-p65 were increased, IL-10 was decreased, and SCI was aggravated. To conclude, The miR-23b delivered by BMSC-EVs targets TLR4 and inhibits the activation of NF-κB pathway, relieves the inflammatory response, so as to improve SCI in rats.
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Affiliation(s)
- Hongfei Nie
- Department of Pain Management, West China Hospital of Sichuan University, Chengdu Sichuan, China
| | - Zhensong Jiang
- Department of Spine Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan Shandong, China
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95
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Rong Z, Huang Y, Cai H, Chen M, Wang H, Liu G, Zhang Z, Wu J. Gut Microbiota Disorders Promote Inflammation and Aggravate Spinal Cord Injury Through the TLR4/MyD88 Signaling Pathway. Front Nutr 2021; 8:702659. [PMID: 34589510 PMCID: PMC8473614 DOI: 10.3389/fnut.2021.702659] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 08/23/2021] [Indexed: 12/02/2022] Open
Abstract
Background: In spinal cord injury (SCI), systemic inflammation and the death of nerve cells in the spinal cord are life threatening. The connection between gut microbiota and signaling pathways has been a hot research topic in recent years. The Toll-like receptor 4/Myeloid differentiation factor 88 (TLR4/MyD88) signaling pathway is closely related to the inflammatory response. This study explored whether the gut microbiota imbalance could affect the TLR4/MyD88 signaling pathway to regulate SCI to provide a new basis for SCI research and treatment. Methods: An SCI model was constructed to study the influence on the injury of gut microbiota. 16S amplicon sequencing was used to identify the diversity and abundance of gut microbes. Fecal microbiota transplantation was performed in mice with SCI. ELISA was used to detect the serum levels of pro-inflammatory and anti-inflammatory factors in mice. Hematoxylin and eosin staining was used to observe SCI in mice. Immunofluorescence was used to detect the rates of loss glial fibrillary acidic protein (GFAP), neuronal nuclear protein (NeuN), and ionized calcium-binding adapter molecule 1 (IBA1) in the spinal cord as indicators of apoptosis. The expression of the TLR4/MyD88 signaling pathway was detected by qRT-PCR and western blotting. Results: Significant differences were observed in the gut microbiota of SCI mice and normal mice. The gut microbiota of SCI mice was imbalanced. The levels of pro-inflammatory cytokines tumor necrosis factor-α, interleukin (IL)-1β, and IL-6 in SCI mice were increased, as was the level of the toxic induced nitric oxide synthase. The levels of anti-inflammatory factors IL-4, transforming growth factor-β, and IL-10 were decreased, as was the level of arginase-1. The apoptosis rates of GFAP, NeuN, and IBA1 were increased. The TLR4/MyD88 signaling pathway was activated. In the SCI group, inflammation increased after fecal transplantation, apoptosis of GFAP, NeuN, and IBA1 increased, and SCI was more serious. Conclusion: The TLR4/MyD88 signaling pathway promotes the death of nerve cells by inducing inflammation. Gut microbiota dysregulation can lead to aggravated SCI by activating the TLR4/MyD88 signaling pathway.
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Affiliation(s)
- Zijie Rong
- Department of Spine Surgery, Huizhou Municipal Central Hospital, Huizhou, China.,Orthopaedic Institute, Huizhou Municipal Central Hospital, Huizhou, China
| | - Yuliang Huang
- Orthopaedic Institute, Huizhou Municipal Central Hospital, Huizhou, China.,Department of Orthopaedics, Huizhou Municipal Central Hospital, Huizhou, China
| | - Honghua Cai
- Department of Spine Surgery, Huizhou Municipal Central Hospital, Huizhou, China.,Orthopaedic Institute, Huizhou Municipal Central Hospital, Huizhou, China
| | - Min Chen
- Department of Spine Surgery, Huizhou Municipal Central Hospital, Huizhou, China.,Orthopaedic Institute, Huizhou Municipal Central Hospital, Huizhou, China
| | - Hao Wang
- Department of Spine Surgery, Huizhou Municipal Central Hospital, Huizhou, China.,Orthopaedic Institute, Huizhou Municipal Central Hospital, Huizhou, China
| | - Guihua Liu
- Department of Spine Surgery, Huizhou Municipal Central Hospital, Huizhou, China.,Orthopaedic Institute, Huizhou Municipal Central Hospital, Huizhou, China
| | - Zhiwen Zhang
- Orthopaedic Institute, Huizhou Municipal Central Hospital, Huizhou, China.,Department of Orthopaedics, Huizhou Municipal Central Hospital, Huizhou, China
| | - Jiawen Wu
- Department of Spine Surgery, The People's Hospital of Longhua, Shenzhen Longhua Clinical Medical College of Guangdong Medical University, Shenzhen, China
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96
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Yuan R, Zhao W, Wang QQ, He J, Han S, Gao H, Feng Y, Yang S. Cucurbitacin B inhibits non-small cell lung cancer in vivo and in vitro by triggering TLR4/NLRP3/GSDMD-dependent pyroptosis. Pharmacol Res 2021; 170:105748. [PMID: 34217831 DOI: 10.1016/j.phrs.2021.105748] [Citation(s) in RCA: 115] [Impact Index Per Article: 38.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 06/09/2021] [Accepted: 06/27/2021] [Indexed: 12/21/2022]
Abstract
Pyroptosis, a type of programmed cell death (PCD), is characterized by cell swelling with bubbles, and the release of inflammatory cell cytokines. Cucurbitacin B (CuB), extracted from muskmelon pedicel, is a natural bioactive product that could effectively exert anti-tumor activities in lung cancer. However, the exact molecular mechanisms and the direct targets of CuB in non-small cell lung cancer (NSCLC) remain to be discovered. Here, we firstly found that CuB exerted an anti-tumor effect via pyroptosis in NSCLC cells and NSCLC mice models. Next, based on the molecular docking and cellular thermal shift assay (CETSA), we identified that CuB directly bound to Toll-like receptor 4 (TLR4) to activate the NLRP3 inflammasome, which further caused the separation of N- and C-terminals of Gasdermin D (GSDMD) to execute pyroptosis. Moreover, CuB enhanced the mitochondrial reactive oxygen species (ROS), mitochondrial membrane protein Tom20 accumulation, and cytosolic calcium (Ca2+) release, leading to pyroptosis in NSCLC cells. Silencing of TLR4 inhibited CuB-induced pyroptosis and decreased the level of ROS and Ca2+ in A549 cells. In vivo study showed that CuB treatment suppressed lung tumor growth in mice via pyroptosis without dose-dependent manner, and CuB at 0.75 mg/kg had a better anti-tumor effect compared to the Gefitinib group. Taken together, our findings revealed the mechanisms and targets of CuB triggering pyroptosis in NSCLC, thus supporting the notion of developing CuB as a promising therapeutic agent for NSCLC.
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Affiliation(s)
- Renyikun Yuan
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China; College of Pharmacy, Guangxi University of Chinese Medicine, Nanning 530000, China
| | - Wentong Zhao
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China; College of Pharmacy, Guangxi University of Chinese Medicine, Nanning 530000, China
| | - Qin-Qin Wang
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning 530000, China; Guangxi Engineering Technology Research Center of Advantage Chinese Patent Drug and Ethnic Drug Development, Nanning 530020, China
| | - Jia He
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning 530000, China; Guangxi Engineering Technology Research Center of Advantage Chinese Patent Drug and Ethnic Drug Development, Nanning 530020, China
| | - Shan Han
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning 530000, China; Guangxi Engineering Technology Research Center of Advantage Chinese Patent Drug and Ethnic Drug Development, Nanning 530020, China
| | - Hongwei Gao
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning 530000, China; Guangxi Engineering Technology Research Center of Advantage Chinese Patent Drug and Ethnic Drug Development, Nanning 530020, China.
| | - Yulin Feng
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China; State Key Laboratory of Innovative Drug and Efficient Energy-Saving Pharmaceutical Equipment, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China.
| | - Shilin Yang
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning 530000, China; Guangxi Engineering Technology Research Center of Advantage Chinese Patent Drug and Ethnic Drug Development, Nanning 530020, China
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97
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Almutairi F, Tucker SL, Sarr D, Rada B. PI3K/ NF-κB-dependent TNF-α and HDAC activities facilitate LPS-induced RGS10 suppression in pulmonary macrophages. Cell Signal 2021; 86:110099. [PMID: 34339853 PMCID: PMC8406451 DOI: 10.1016/j.cellsig.2021.110099] [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: 05/04/2021] [Revised: 07/22/2021] [Accepted: 07/23/2021] [Indexed: 12/16/2022]
Abstract
Regulator of G-protein signaling 10 (RGS10) is a member of the superfamily of RGS proteins that canonically act as GTPase activating proteins (GAPs). RGS proteins accelerate GTP hydrolysis on the G-protein α subunits and result in termination of signaling pathways downstream of G protein-coupled receptors. Beyond its GAP function, RGS10 has emerged as an anti-inflammatory protein by inhibiting LPS-mediated NF-κB activation and expression of inflammatory cytokines, in particular TNF-α. Although RGS10 is abundantly expressed in resting macrophages, previous studies have shown that RGS10 expression is suppressed in macrophages following Toll-like receptor 4 (TLR4) activation by LPS. However, the molecular mechanism by which LPS induces Rgs10 silencing has not been clearly defined. The goal of the current study was to determine whether LPS silences Rgs10 expression through an NF-κB-mediated proinflammatory mechanism in pulmonary macrophages, a unique type of innate immune cells. We demonstrate that Rgs10 transcript and RGS10 protein levels are suppressed upon LPS treatment in the murine MH-S alveolar macrophage cell line. We show that pharmacological inhibition of PI3K/ NF-κB/p300 (NF-κB co-activator)/TNF-α signaling cascade and the activities of HDAC (1-3) enzymes block LPS-induced silencing of Rgs10 in MH-S cells as well as microglial BV2 cells and BMDMs. Further, loss of RGS10 generated by using CRISPR/Cas9 amplifies NF-κB phosphorylation and inflammatory gene expression following LPS treatment in MH-S cells. Together, our findings strongly provide critical insight into the molecular mechanism underlying RGS10 suppression by LPS in pulmonary macrophages.
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Affiliation(s)
- Faris Almutairi
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, USA; Department of Pharmaceutical and Biomedical Sciences, College of Pharmacy, University of Georgia, Athens, GA, USA
| | - Samantha L Tucker
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - Demba Sarr
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - Balázs Rada
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, USA.
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98
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Chen Z, Wu H, Zhang M. Long non-coding RNA: An underlying bridge linking neuroinflammation and central nervous system diseases. Neurochem Int 2021; 148:105101. [PMID: 34139298 DOI: 10.1016/j.neuint.2021.105101] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 06/05/2021] [Accepted: 06/10/2021] [Indexed: 02/08/2023]
Abstract
Central nervous system (CNS) diseases are responsible for a large proportion of morbidity and mortality worldwide. CNS diseases caused by intrinsic and extrinsic stimuli stimulate the resident immune cells including microglia and astrocyte, resulting in neuroinflammation that exacerbates the progression of diseases. Recent evidence reveals the aberrant expression patterns of long non-coding RNAs (lncRNAs) in the damaged tissues following CNS diseases. It was also proposed that lncRNAs possessed immune-modulatory activities by directly or indirectly affecting various effector proteins including transcriptional factor, acetylase, protein kinase, phosphatase, etc. In addition, lncRNAs can form a sophisticated network by interacting with other molecules to regulate the expression or activation of downstream immune response pathways. However, the major roles of lncRNAs in CNS pathophysiologies are still elusive, especially in neuroinflammation. Herein, we tend to review some potential roles of lncRNAs in modulating neuroinflammation based on current evidence in various CNS diseases, in order to provide novel explanations for the initiation and progression of CNS diseases and help to establish therapeutic strategies targeting neuroinflammation.
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Affiliation(s)
- Zhuohui Chen
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Haiyue Wu
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Mengqi Zhang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, 410008, China.
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99
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Ghafouri-Fard S, Abak A, Shoorei H, Talebi SF, Mohaqiq M, Sarabi P, Taheri M, Mokhtari M. Interaction between non-coding RNAs and Toll-like receptors. Biomed Pharmacother 2021; 140:111784. [PMID: 34087695 DOI: 10.1016/j.biopha.2021.111784] [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: 04/25/2021] [Revised: 05/24/2021] [Accepted: 05/25/2021] [Indexed: 12/11/2022] Open
Abstract
Toll-like receptors (TLRs) are a large group of pattern recognition receptors which are involved in the regulation of innate immune responses. Based on the interplay between TLRs and adapter molecules, two distinctive signaling cascades, namely the MyD88-dependent and TRIF-dependent pathways have been recognized. TLRs are involved in the development of a wide variety of diseases including cancer and autoimmune disorders. A large body of evidence has shown interaction between two classes of non-coding RNAs, namely microRNAs (miRNAs) and long noncoding RNAs (lncRNAs). These interactions have prominent roles in the pathogenesis of several disorders including infectious disorders, autoimmune conditions and neoplastic disorders. This review aims at description of the interaction between these non-coding RNAs and TLRs.
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Affiliation(s)
- Soudeh Ghafouri-Fard
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Atefe Abak
- Phytochemistry Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hamed Shoorei
- Department of Anatomical Sciences, Faculty of Medicine, Birjand University of Medical Sciences, Birjand, Iran
| | | | - Mahdi Mohaqiq
- School of Advancement, Centennial College, Ashtonbee Campus, Toronto, ON, Canada
| | - Parisa Sarabi
- Deputy for Research & Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Taheri
- Urology and Nephrology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Majid Mokhtari
- Skull Base Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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100
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Fang S, Zhong L, Wang AQ, Zhang H, Yin ZS. Identification of Regeneration and Hub Genes and Pathways at Different Time Points after Spinal Cord Injury. Mol Neurobiol 2021; 58:2643-2662. [PMID: 33484404 DOI: 10.1007/s12035-021-02289-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 01/11/2021] [Indexed: 12/19/2022]
Abstract
Spinal cord injury (SCI) is a neurological injury that can cause neuronal loss around the lesion site and leads to locomotive and sensory deficits. However, the underlying molecular mechanisms remain unclear. This study aimed to verify differential gene time-course expression in SCI and provide new insights for gene-level studies. We downloaded two rat expression profiles (GSE464 and GSE45006) from the Gene Expression Omnibus database, including 1 day, 3 days, 7 days, and 14 days post-SCI, along with thoracic spinal cord data for analysis. At each time point, gene integration was performed using "batch normalization." The raw data were standardized, and differentially expressed genes at the different time points versus the control were analyzed by Gene Ontology enrichment analysis, the Kyoto Encyclopedia of Genes and Genomes pathway analysis, and gene set enrichment analysis. A protein-protein interaction network was then built and visualized. In addition, ten hub genes were identified at each time point. Among them, Gnb5, Gng8, Agt, Gnai1, and Psap lack correlation studies in SCI and deserve further investigation. Finally, we screened and analyzed genes for tissue repair, reconstruction, and regeneration and found that Anxa1, Snap25, and Spp1 were closely related to repair and regeneration after SCI. In conclusion, hub genes, signaling pathways, and regeneration genes involved in secondary SCI were identified in our study. These results may be useful for understanding SCI-related biological processes and the development of targeted intervention strategies.
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Affiliation(s)
- Sheng Fang
- Department of Orthopedics, The First Affiliated Hospital of Anhui Medical University, #218 Jixi Road, Hefei, 230022, Anhui Province, China
| | - Lin Zhong
- Department of Orthopedics, The First Affiliated Hospital of Anhui Medical University, #218 Jixi Road, Hefei, 230022, Anhui Province, China
- Department of Orthopedics, The Third Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - An-Quan Wang
- Department of Orthopedics, The First Affiliated Hospital of Anhui Medical University, #218 Jixi Road, Hefei, 230022, Anhui Province, China
| | - Hui Zhang
- Department of Orthopedics, The First Affiliated Hospital of Anhui Medical University, #218 Jixi Road, Hefei, 230022, Anhui Province, China
| | - Zong-Sheng Yin
- Department of Orthopedics, The First Affiliated Hospital of Anhui Medical University, #218 Jixi Road, Hefei, 230022, Anhui Province, China.
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