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Wang J, Gu D, Jin K, Shen H, Qian Y. Egr1 promotes Nlrc4-dependent neuronal pyroptosis through phlda1 in an in-vitro model of intracerebral hemorrhage. Neuroreport 2024; 35:590-600. [PMID: 38652514 DOI: 10.1097/wnr.0000000000002035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
Intracerebral hemorrhage (ICH) is a fatal brain injury, but the current treatments for it are inadequate to reduce the severity of secondary brain injury. Our study aims to explore the molecular mechanism of Egr1 and Phlda1 in regulating hemin-induced neuronal pyroptosis, and hope to provide novel therapeutic targets for ICH treatment. Mouse hippocampal neuron cells treated with hemin were used to simulate an in-vitro ICH model. Using qRT-PCR and western blot to evaluate mRNA and protein concentrations. MTT assay was utilized to assess cell viability. LDH levels were determined by lactate Dehydrogenase Activity Assay Kit. IL-1β and IL-18 levels were examined by ELISA. The interaction of Egr1 and Phlda1 promoter was evaluated using chromatin immunoprecipitation and dual-luciferase reporter assays. Egr1 and Phlda1 were both upregulated in HT22 cells following hemin treatment. Hemin treatment caused a significant reduction in HT22 cell viability, an increase in Nlrc4 and HT22 cell pyroptosis, and heightened inflammation. However, knocking down Egr1 neutralized hemin-induced effects on HT22 cells. Egr1 bound to the promoter of Phlda1 and transcriptionally activated Phlda1. Silencing Phlda1 significantly reduced Nlrc4-dependent neuronal pyroptosis. Conversely, overexpressing Phlda1 mitigated the inhibitory effects of Egr1 knockdown on Nlrc4 and neuronal pyroptosis during ICH. Egr1 enhanced neuronal pyroptosis mediated by Nlrc4 under ICH via transcriptionally activating Phlda1.
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Affiliation(s)
- Jian Wang
- Department of Neurosurgery, Taicang Hospital of Traditional Chinese Medicine, Taicang, Jiangsu Province, China
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2
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Hu W, Wang M, Sun G, Zhang L, Lu H. RND3 modulates microglial polarization and alleviates neuroinflammation in Parkinson's disease by suppressing NLRP3 inflammasome activation. Exp Cell Res 2024; 439:114088. [PMID: 38744409 DOI: 10.1016/j.yexcr.2024.114088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 04/29/2024] [Accepted: 05/10/2024] [Indexed: 05/16/2024]
Abstract
Neuroinflammation mediated by microglia plays an important role in the etiology of Parkinson's disease (PD). Rho family GTPase 3 (RND3) exerts anti-inflammatory effects and may act as a potential new inducer of neuroprotective phenotypes in microglia. However, whether RND3 can be used to regulate microglia activation or reduce neuroinflammation in PD remains elusive. The study investigated the microglia modulating effects and potential anti-inflammatory effects of RND3 in vivo and in vitro, using animal models of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced PD and cell models of BV-2 cells stimulated by LPS plus IFN-γ with or without RND3-overexpression. The results showed that RND3 was highly expressed in the MPTP-induced PD mouse model and BV-2 cells treated with LPS and IFN-γ. In vivo experiments confirmed that RND3 overexpression could modulate microglia phenotype and ameliorate MPTP-induced neuroinflammation through inhibiting activation of the NLRP3 inflammasome in substantia nigra pars compacta (SNpc). In vitro study showed that RND3 overexpression could attenuate the production of pro-inflammatory factors in BV2 cells stimulated by LPS and IFN-γ. Mechanistically, RND3 reduced the activation of the NLRP3 inflammasome upon LPS and IFN-γ stimulation. Taken together, these findings suggest that RND3 modulates microglial polarization and alleviates neuroinflammation in Parkinson's disease by suppressing NLRP3 inflammasome activation.
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Affiliation(s)
- Wentao Hu
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China.
| | - Menghan Wang
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China
| | - Guifang Sun
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China
| | - Limin Zhang
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China
| | - Hong Lu
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China.
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Deng RM, Zhou J. Targeting NF-κB in Hepatic Ischemia-Reperfusion Alleviation: from Signaling Networks to Therapeutic Targeting. Mol Neurobiol 2024; 61:3409-3426. [PMID: 37991700 DOI: 10.1007/s12035-023-03787-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 11/09/2023] [Indexed: 11/23/2023]
Abstract
Hepatic ischemia-reperfusion injury (HIRI) is a major complication of liver trauma, resection, and transplantation that can lead to liver dysfunction and failure. Scholars have proposed a variety of liver protection methods aimed at reducing ischemia-reperfusion damage, but there is still a lack of effective treatment methods, which urgently needs to find new effective treatment methods for patients. Many studies have reported that signaling pathway plays a key role in HIRI pathological process and liver function recovery mechanism, among which nuclear transfer factor-κB (NF-κB) signaling pathway is one of the signal transduction closely related to disease. NF-κB pathway is closely related to HIRI pathologic process, and inhibition of this pathway can delay oxidative stress, inflammatory response, cell death, and mitochondrial dysfunction. In addition, NF-κB can also interact with PI3K/Akt, MAPK, and Nrf2 signaling pathways to participate in HIRI regulation. Based on the role of NF-κB pathway in HIRI, it may be a potential target pathway for HIRI. This review emphasizes the role of inhibiting the NF-κB signaling pathway in oxidative stress, inflammatory response, cell death, and mitochondrial dysfunction in HIRI, as well as the effects of related drugs or inhibitors targeting NF-κB on HIRI. The objective of this review is to elucidate the role and mechanism of NF-κB pathway in HIRI, emphasize the important role of NF-κB pathway in the prevention and treatment of HIRI, and provide a theoretical basis for the target NF-κB pathway as a therapy for HIRI.
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Affiliation(s)
- Rui-Ming Deng
- Department of Anesthesiology, Ganzhou People's Hospital, 16 Meiguan Avenue, Ganzhou, Jiangxi Province, 341000, People's Republic of China
- The Affiliated Ganzhou Hospital of Nanchang University (Ganzhou Hospital-Nanfang Hospital, Southern Medical University), 16 Meiguan Avenue, Ganzhou, Jiangxi Province, 341000, People's Republic of China
| | - Juan Zhou
- The Affiliated Ganzhou Hospital of Nanchang University (Ganzhou Hospital-Nanfang Hospital, Southern Medical University), 16 Meiguan Avenue, Ganzhou, Jiangxi Province, 341000, People's Republic of China.
- Department of Thyroid and Breast Surgery, Ganzhou People's Hospital, 16 Meiguan Avenue, Ganzhou, Jiangxi Province, 341000, People's Republic of China.
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Wang X, Rao J, Chen X, Wang Z, Zhang Y. Identification of Shared Signature Genes and Immune Microenvironment Subtypes for Heart Failure and Chronic Kidney Disease Based on Machine Learning. J Inflamm Res 2024; 17:1873-1895. [PMID: 38533476 PMCID: PMC10964169 DOI: 10.2147/jir.s450736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 03/19/2024] [Indexed: 03/28/2024] Open
Abstract
Background A complex interrelationship exists between Heart Failure (HF) and chronic kidney disease (CKD). This study aims to clarify the molecular mechanisms of the organ-to-organ interplay between heart failure and CKD, as well as to identify extremely sensitive and specific biomarkers. Methods Differentially expressed tandem genes were identified from HF and CKD microarray datasets and enrichment analyses of tandem perturbation genes were performed to determine their biological functions. Machine learning algorithms are utilized to identify diagnostic biomarkers and evaluate the model by ROC curves. RT-PCR was employed to validate the accuracy of diagnostic biomarkers. Molecular subtypes were identified based on tandem gene expression profiling, and immune cell infiltration of different subtypes was examined. Finally, the ssGSEA score was used to build the ImmuneScore model and to assess the differentiation between subtypes using ROC curves. Results Thirty-three crosstalk genes were associated with inflammatory, immune and metabolism-related signaling pathways. The machine-learning algorithm identified 5 hub genes (PHLDA1, ATP1A1, IFIT2, HLTF, and MPP3) as the optimal shared diagnostic biomarkers. The expression levels of tandem genes were negatively correlated with left ventricular ejection fraction and glomerular filtration rate. The CIBERSORT results indicated the presence of severe immune dysregulation in patients with HF and CKD, which was further validated at the single-cell level. Consensus clustering classified HF and CKD patients into immune and metabolic subtypes. Twelve immune genes associated with immune subtypes were screened based on WGCNA analysis, and an ImmuneScore model was constructed for high and low risk. The model accurately predicted different molecular subtypes of HF or CKD. Conclusion Five crosstalk genes may serve as potential biomarkers for diagnosing HF and CKD and are involved in disease progression. Metabolite disorders causing activation of a large number of immune cells explain the common pathogenesis of HF and CKD.
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Affiliation(s)
- Xuefu Wang
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, People’s Republic of China
| | - Jin Rao
- Department of Cardiothoracic Surgery, Shanghai Changzheng Hospital, Naval Medical University, Shanghai, People’s Republic of China
| | - Xiangyu Chen
- Department of Cardiothoracic Surgery, Shanghai Changzheng Hospital, Naval Medical University, Shanghai, People’s Republic of China
| | - Zhinong Wang
- Department of Cardiothoracic Surgery, Shanghai Changzheng Hospital, Naval Medical University, Shanghai, People’s Republic of China
| | - Yufeng Zhang
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, People’s Republic of China
- Department of Cardiothoracic Surgery, Shanghai Changzheng Hospital, Naval Medical University, Shanghai, People’s Republic of China
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Ma Y, Wang W, Liu S, Qiao X, Xing Y, Zhou Q, Zhang Z. Epigenetic Regulation of Neuroinflammation in Alzheimer's Disease. Cells 2023; 13:79. [PMID: 38201283 PMCID: PMC10778497 DOI: 10.3390/cells13010079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 12/25/2023] [Accepted: 12/28/2023] [Indexed: 01/12/2024] Open
Abstract
Alzheimer's disease (AD) is a chronic and progressive neurodegenerative disease and clinically manifests with cognitive decline and behavioral disabilities. Over the past years, mounting studies have demonstrated that the inflammatory response plays a key role in the onset and development of AD, and neuroinflammation has been proposed as the third major pathological driving factor of AD, ranking after the two well-known core pathologies, amyloid β (Aβ) deposits and neurofibrillary tangles (NFTs). Epigenetic mechanisms, referring to heritable changes in gene expression independent of DNA sequence alterations, are crucial regulators of neuroinflammation which have emerged as potential therapeutic targets for AD. Upon regulation of transcriptional repression or activation, epigenetic modification profiles are closely involved in inflammatory gene expression and signaling pathways of neuronal differentiation and cognitive function in central nervous system disorders. In this review, we summarize the current knowledge about epigenetic control mechanisms with a focus on DNA and histone modifications involved in the regulation of inflammatory genes and signaling pathways in AD, and the inhibitors under clinical assessment are also discussed.
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Affiliation(s)
- Yajing Ma
- College of Biology and Food, Shangqiu Normal University, Shangqiu 476000, China;
| | - Wang Wang
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou 450001, China; (W.W.); (Y.X.)
| | - Sufang Liu
- Department of Biomedical Sciences, College of Dentistry, Texas A&M University, Dallas, TX 75246, USA;
| | - Xiaomeng Qiao
- Department of Pathology and Forensic Medicine, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou 450001, China;
| | - Ying Xing
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou 450001, China; (W.W.); (Y.X.)
| | - Qingfeng Zhou
- College of Biology and Food, Shangqiu Normal University, Shangqiu 476000, China;
| | - Zhijian Zhang
- College of Biology and Food, Shangqiu Normal University, Shangqiu 476000, China;
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Park E, Jeon H, Lee N, Yu J, Park H, Satoh T, Akira S, Furuyama T, Lee C, Choi J, Rho J. TDAG51 promotes transcription factor FoxO1 activity during LPS-induced inflammatory responses. EMBO J 2023; 42:e111867. [PMID: 37203866 PMCID: PMC10308371 DOI: 10.15252/embj.2022111867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 04/28/2023] [Accepted: 05/03/2023] [Indexed: 05/20/2023] Open
Abstract
Tight regulation of Toll-like receptor (TLR)-mediated inflammatory responses is important for innate immunity. Here, we show that T-cell death-associated gene 51 (TDAG51/PHLDA1) is a novel regulator of the transcription factor FoxO1, regulating inflammatory mediator production in the lipopolysaccharide (LPS)-induced inflammatory response. TDAG51 induction by LPS stimulation was mediated by the TLR2/4 signaling pathway in bone marrow-derived macrophages (BMMs). LPS-induced inflammatory mediator production was significantly decreased in TDAG51-deficient BMMs. In TDAG51-deficient mice, LPS- or pathogenic Escherichia coli infection-induced lethal shock was reduced by decreasing serum proinflammatory cytokine levels. The recruitment of 14-3-3ζ to FoxO1 was competitively inhibited by the TDAG51-FoxO1 interaction, leading to blockade of FoxO1 cytoplasmic translocation and thereby strengthening FoxO1 nuclear accumulation. TDAG51/FoxO1 double-deficient BMMs showed significantly reduced inflammatory mediator production compared with TDAG51- or FoxO1-deficient BMMs. TDAG51/FoxO1 double deficiency protected mice against LPS- or pathogenic E. coli infection-induced lethal shock by weakening the systemic inflammatory response. Thus, these results indicate that TDAG51 acts as a regulator of the transcription factor FoxO1, leading to strengthened FoxO1 activity in the LPS-induced inflammatory response.
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Affiliation(s)
- Eui‐Soon Park
- Department of Microbiology and Molecular BiologyChungnam National UniversityDaejeonKorea
| | - Hyoeun Jeon
- Department of Microbiology and Molecular BiologyChungnam National UniversityDaejeonKorea
| | - Nari Lee
- Department of Microbiology and Molecular BiologyChungnam National UniversityDaejeonKorea
| | - Jiyeon Yu
- Department of Microbiology and Molecular BiologyChungnam National UniversityDaejeonKorea
| | - Hye‐Won Park
- Department of Microbiology and Molecular BiologyChungnam National UniversityDaejeonKorea
| | - Takashi Satoh
- Department of Immune Regulation, Graduate School of Medical and Dental SciencesTokyo Medical and Dental UniversityTokyoJapan
| | - Shizuo Akira
- Laboratory of Host Defense, WPI Immunology Frontier Research CenterOsaka UniversityOsakaJapan
| | - Tatsuo Furuyama
- Department of Clinical ExaminationKagawa Prefectural University of Health SciencesKagawaJapan
| | - Chul‐Ho Lee
- Laboratory Animal CenterKorea Research Institute of Bioscience & Biotechnology (KRIBB)DaejeonKorea
| | - Jong‐Soon Choi
- Division of Life ScienceKorea Basic Science Institute (KBSI)DaejeonKorea
| | - Jaerang Rho
- Department of Microbiology and Molecular BiologyChungnam National UniversityDaejeonKorea
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Ge X, Zhou Z, Yang S, Ye W, Wang Z, Wang J, Xiao C, Cui M, Zhou J, Zhu Y, Wang R, Gao Y, Wang H, Tang P, Zhou X, Wang C, Cai W. Exosomal USP13 derived from microvascular endothelial cells regulates immune microenvironment and improves functional recovery after spinal cord injury by stabilizing IκBα. Cell Biosci 2023; 13:55. [PMID: 36915206 PMCID: PMC10012460 DOI: 10.1186/s13578-023-01011-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Accepted: 03/09/2023] [Indexed: 03/14/2023] Open
Abstract
Spinal cord injury (SCI) can result in irreversible sensory and motor disability with no effective treatment currently. After SCI, infiltrated macrophages accumulate in epicenter through destructed blood-spinal cord barrier (BSCB). Further, great majority of macrophages are preferentially polarized to M1 phenotype, with only a few transient M2 phenotype. The purpose of this study was to explore roles of vascular endothelial cells in microglia/macrophages polarization and the underlying mechanism. Lipopolysaccharide (LPS) was used to pretreat BV2 microglia and RAW264.7 macrophages followed by administration of conditioned medium from microvascular endothelial cell line bEnd.3 cells (ECM). Analyses were then performed to determine the effects of exosomes on microglia/macrophages polarization and mitochondrial function. The findings demonstrated that administration of ECM shifted microglia/macrophages towards M2 polarization, ameliorated mitochondrial impairment, and reduced reactive oxygen species (ROS) production in vitro. Notably, administration of GW4869, an exosomal secretion inhibitor, significantly reversed these observed benefits. Further results revealed that exosomes derived from bEnd.3 cells (Exos) promote motor rehabilitation and M2 polarization of microglia/macrophages in vivo. Ubiquitin-specific protease 13 (USP13) was shown to be significantly enriched in BV2 microglia treated with Exos. USP13 binds to, deubiquitinates and stabilizes the NF-κB inhibitor alpha (IκBα), thus regulating microglia/macrophages polarization. Administration of the selective IκBα inhibitor betulinic acid (BA) inhibited the beneficial effect of Exos in vivo. These findings uncovered the potential mechanism underlying the communications between vascular endothelial cells and microglia/macrophages after SCI. In addition, this study indicates exosomes might be a promising therapeutic strategy for SCI treatment.
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Affiliation(s)
- Xuhui Ge
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Zheng Zhou
- Department of Emergency Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Siting Yang
- Department of Anesthesiology and Nursing, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Wu Ye
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Zhuanghui Wang
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Jiaxing Wang
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Chenyu Xiao
- Department of Human Anatomy, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Min Cui
- Department of Human Anatomy, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Jiawen Zhou
- Department of Pharmacology, China Pharmaceutical University, Nanjing, 211198, China
| | - Yufeng Zhu
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Rixiao Wang
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Yu Gao
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Haofan Wang
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Pengyu Tang
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Xuhui Zhou
- Department of Orthopedics, Second Affiliated Hospital of Naval Medical University, Shanghai, 200003, China
| | - Ce Wang
- Department of Orthopedics, Second Affiliated Hospital of Naval Medical University, Shanghai, 200003, China.
| | - Weihua Cai
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China.
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PHLDA1 knockdown alleviates mitochondrial dysfunction and endoplasmic reticulum stress-induced neuronal apoptosis via activating PPARγ in cerebral ischemia-reperfusion injury. Brain Res Bull 2023; 194:23-34. [PMID: 36681251 DOI: 10.1016/j.brainresbull.2023.01.007] [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: 08/11/2022] [Revised: 01/15/2023] [Accepted: 01/17/2023] [Indexed: 01/19/2023]
Abstract
Mitochondrial dysfunction and endoplasmic reticulum (ER) stress occur in ischemic stroke. The disruption of these two organelles can directly lead to cell death through various signaling pathways. Thus, investigation of the associated molecular mechanisms in cerebral ischemia is a prerequisite for stroke treatment. Pleckstrin homology-like domain family A member 1 (PHLDA1) is a multifunctional protein that can modulate mitochondrial function and ER stress in cardiomyocyte and cancer cells. This work studied the role of PHLDA1 in cerebral ischemic/reperfusion (I/R) injury and explored the underlying mechanisms associated with mitochondrial functions and ER stress. Middle cerebral artery occlusion/reperfusion (MCAO/R)-treated mice and oxygen-glucose deprivation/reoxygenation (OGD/R)-stimulated neurons were used as I/R models in vivo and in vitro, respectively. PHLDA1 was upregulated in ischemic penumbra of MCAO/R-induced mice and OGD/R-exposed neurons. In vitro, PHLDA1 knockdown protected neurons from OGD/R-induced apoptosis. In vivo, PHLDA1 silencing facilitated functional recovery and reduced cerebral infarct volume. Mechanistically, PHLDA1 knockdown promoted PPARγ nuclear translocation, which may mediate the effects on reversion of mitochondrial functions and alleviation of ER stress. In summary, PHLDA1 knockdown alleviates neuronal ischemic injuries in mice. PPARγ activation and mitochondrial dysfunction and endoplasmic reticulum stress attenuation are involved in the underlying mechanisms.
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Lai J, Chen G, Wu Z, Yu S, Huang R, Zeng Y, Lin W, Fan C, Chen X. PHLDA1 modulates microglial response and NLRP3 inflammasome signaling following experimental subarachnoid hemorrhage. Front Immunol 2023; 14:1105973. [PMID: 36875102 PMCID: PMC9982097 DOI: 10.3389/fimmu.2023.1105973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 01/12/2023] [Indexed: 02/19/2023] Open
Abstract
Balancing microglia M1/M2 polarization is an effective therapeutic strategy for neuroinflammation after subarachnoid hemorrhage (SAH). Pleckstrin homology-like domain family A member 1 (PHLDA1) has been demonstrated to play a crucial role in immune response. However, the function roles of PHLDA1 in neuroinflammation and microglial polarization after SAH remain unclear. In this study, SAH mouse models were assigned to treat with scramble or PHLDA1 small interfering RNAs (siRNAs). We observed that PHLDA1 was significantly increased and mainly distributed in microglia after SAH. Concomitant with PHLDA1 activation, nod-like receptor pyrin domain-containing protein 3 (NLRP3) inflammasome expression in microglia was also evidently enhanced after SAH. In addition, PHLDA1 siRNA treatment significantly reduced microglia-mediated neuroinflammation by inhibiting M1 microglia and promoting M2 microglia polarization. Meanwhile, PHLDA1 deficiency reduced neuronal apoptosis and improved neurological outcomes after SAH. Further investigation revealed that PHLDA1 blockade suppressed the NLRP3 inflammasome signaling after SAH. In contrast, NLRP3 inflammasome activator nigericin abated the beneficial effects of PHLDA1 deficiency against SAH by promoting microglial polarization to M1 phenotype. In all, we proposed that PHLDA1 blockade might ameliorate SAH-induced brain injury by balancing microglia M1/M2 polarization via suppression of NLRP3 inflammasome signaling. Targeting PHLDA1 might be a feasible strategy for treating SAH.
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Affiliation(s)
- Jinqing Lai
- Department of Neurosurgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China.,Centre of Neurological and Metabolic Research, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China
| | - Genwang Chen
- Clinical Lab and Medical Diagnostics Laboratory, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China
| | - Zhe Wu
- Department of Neurosurgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China.,Centre of Neurological and Metabolic Research, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China
| | - Shaoyang Yu
- Clinical Lab and Medical Diagnostics Laboratory, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China
| | - Rongfu Huang
- Clinical Lab and Medical Diagnostics Laboratory, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China
| | - Yile Zeng
- Department of Neurosurgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China
| | - Weibin Lin
- Department of Neurosurgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China
| | - Chunmei Fan
- Clinical Lab and Medical Diagnostics Laboratory, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China
| | - Xiangrong Chen
- Department of Neurosurgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China.,Centre of Neurological and Metabolic Research, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China
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10
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Yang X, Li X, Wu C, Zhang F. Knockdown of PHLDA1 Alleviates Necrotizing Enterocolitis by Inhibiting NLRP3 Inflammasome Activation and Pyroptosis Through Enhancing Nrf2 Signaling. Immunol Invest 2022; 52:257-269. [PMID: 36576246 DOI: 10.1080/08820139.2022.2161910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
OBJECTIVE Pleckstrin homology-like domain family A member 1 (PHLDA1) is involved in the progression of intestine-related diseases, but its role and related mechanisms in Necrotizing enterocolitis (NEC) are unclear. The aim of this study was to better understand the function of PHLDA1 in NEC and the underlying mechanisms. METHODS A neonatal mouse model of NEC was established by hypoxic hypothermia, and sh-PHLDA1 was transfected into mice to observe the mortality of each group within 4 days. The levels of IL-1β, IL-6, IL-18 and TNF-α were measured by PCR and ELISA. ROS, MDA, SOD, and GSH-Px levels were detected by Dihydroethidium (DHE) method and kit; expression of pyroptosis-related factors including NLRP3, ASC, cleaved-caspase1, GSDMD-N, IL-1β, IL-18, and Nrf2 were detected by western-blot; mechanistically, the effects of transfection of sh-PHLDA1 and ML385 (Nrf2 inhibitor) were investigated, and the expression of pyroptosis-related factors was detected again. RESULTS PHLDA1 was highly expressed in the intestinal tissues of NEC mice, and transfection of sh-PHLDA1 improved the survival rate, alleviated intestinal lesions, improved intestinal inflammation, oxidative stress and cellular scorching in NEC. In addition, sh-PHLDA1 was able to inhibit NLRP3 activation and pyroptosis by activating Nrf2. CONCLUSION Knockdown of PHLDA1 attenuated necrotizing small intestinal colitis by enhancing Nrf2 expression to inhibit NLRP3 inflammasome activation and pyroptosis.
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Affiliation(s)
- Xin Yang
- Department of Emergency, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China.,Department of Pediatrics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Xihong Li
- Department of Emergency, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China.,Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu, Sichuan, China
| | - Chan Wu
- Department of Pediatrics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Feng Zhang
- Department of Pediatrics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
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11
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Jeon H, Amarasekara DS, Lee N, Park HW, Yu J, Rho J. TDAG51 deficiency attenuates dextran sulfate sodium-induced colitis in mice. Sci Rep 2022; 12:20619. [PMID: 36450854 PMCID: PMC9712416 DOI: 10.1038/s41598-022-24873-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 11/22/2022] [Indexed: 12/12/2022] Open
Abstract
Inflammatory bowel disease (IBD), including ulcerative colitis and Crohn's disease, is a group of chronic inflammatory diseases of the gastrointestinal tract. Although the multifactorial etiology of IBD pathogenesis is relatively well documented, the regulatory factors that confer a risk of IBD pathogenesis remain less explored. In this study, we report that T-cell death-associated gene 51 (TDAG51/PHLDA1) is a novel regulator of the development of dextran sulfate sodium (DSS)-induced colitis in mice. TDAG51 expression was elevated in the colon tissues of DSS-induced experimental colitis mice. TDAG51 deficiency protected mice against acute DSS-induced lethality and body weight changes and disease severity. DSS-induced structural damage and mucus secretion in colon tissues were significantly reduced in TDAG51-deficient mice compared with wild-type mice. We observed similar results in a DSS-induced chronic colitis mouse model. Finally, we showed that the production of inflammatory mediators, including proinflammatory enzymes, molecules and cytokines, was decreased in DSS-treated TDAG51-deficient mice compared with DSS-treated wild-type mice. Thus, we demonstrated that TDAG51 deficiency plays a protective role against DSS-induced colitis by decreasing the production of inflammatory mediators in mice. These findings suggest that TDAG51 is a novel regulator of the development of DSS-induced colitis and is a potential therapeutic target for IBD.
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Affiliation(s)
- Hyoeun Jeon
- Department of Microbiology and Molecular Biology, College of Bioscience and Biotechnology, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Korea
| | - Dulshara Sachini Amarasekara
- Department of Microbiology and Molecular Biology, College of Bioscience and Biotechnology, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Korea
| | - Nari Lee
- Department of Microbiology and Molecular Biology, College of Bioscience and Biotechnology, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Korea
| | - Hye-Won Park
- Department of Microbiology and Molecular Biology, College of Bioscience and Biotechnology, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Korea
| | - Jiyeon Yu
- Department of Microbiology and Molecular Biology, College of Bioscience and Biotechnology, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Korea
| | - Jaerang Rho
- Department of Microbiology and Molecular Biology, College of Bioscience and Biotechnology, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Korea.
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12
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Wächter K, Gohde B, Szabó G, Simm A. Rye Bread Crust as an Inducer of Antioxidant Genes and Suppressor of NF-κB Pathway In Vivo. Nutrients 2022; 14:nu14224790. [PMID: 36432475 PMCID: PMC9697834 DOI: 10.3390/nu14224790] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 11/04/2022] [Accepted: 11/09/2022] [Indexed: 11/16/2022] Open
Abstract
Heat-processed food, like bread, containing high amounts of advanced glycation end products (AGEs), is controversially discussed regarding the effects on health and disease. In in vitro and in vivo experiments, AGEs can induce proinflammatory NF-κB and/or the anti-inflammatory NRF2 pathways. The aim of this study was to investigate how gene expression is influenced in vivo upon short as well as long-term feeding of mice with control and bread crust-food (BC). For that, the liver, kidney and heart from two days- and eight days-fed mice were isolated and gene arrays were performed. Fewer genes were affected in terms of expression after two days of BC feeding than after eight days. We observed, especially in the heart and to lesser extent in the liver, an induction of antioxidant response by BC. Among the significantly up-regulated genes identified in the heart were transcripts encoding for cardioprotective and antioxidative proteins like metallothionein 2, uncoupling protein 3 and pyruvate dehydrogenase kinase 4. In contrast, in the liver, genes encoding for inflammatory drivers like thioredoxin-interacting protein, lncRNA Mtss1 and ubiquitin-specific protease 2 were down-modulated. However, an increased expression of immunoglobulins was observed in the kidney. Furthermore, in vivo imaging analyses with NF-κB-luciferase-reporter mice uncovered a rather anti-inflammatory response, especially after three and seven days of the feeding study. Our results suggest that bread crust exerts antioxidant and anti-inflammatory effects in the model organism mouse in an organ-specific manner.
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Affiliation(s)
- Kristin Wächter
- Department for Cardiac Surgery, University Hospital Halle (Saale), Martin-Luther University, Halle-Wittenberg, 06120 Halle (Saale), Germany
- Correspondence: ; Tel.: +49-345-557-7068
| | - Birte Gohde
- Department for Cardiac Surgery, University Hospital Halle (Saale), Martin-Luther University, Halle-Wittenberg, 06120 Halle (Saale), Germany
| | - Gábor Szabó
- Department for Cardiac Surgery, University Hospital Halle (Saale), Martin-Luther University, Halle-Wittenberg, 06120 Halle (Saale), Germany
| | - Andreas Simm
- Department for Cardiac Surgery, University Hospital Halle (Saale), Martin-Luther University, Halle-Wittenberg, 06120 Halle (Saale), Germany
- Center for Medical Basic Research, Martin-Luther-University Halle-Wittenberg, 06120 Halle (Saale), Germany
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13
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Shu L, Du C. PHLDA1 promotes sevoflurane-induced pyroptosis of neuronal cells in developing rats through TRAF6-mediated activation of Rac1. Neurotoxicology 2022; 93:140-151. [PMID: 36155068 DOI: 10.1016/j.neuro.2022.09.007] [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: 06/16/2022] [Revised: 09/18/2022] [Accepted: 09/19/2022] [Indexed: 10/14/2022]
Abstract
Sevoflurane anesthesia induces neurocognitive impairment and pyroptosis in the developing brain. Pleckstrin homology-like domain, family A, member 1 (PHLDA1) was involved in neuronal apoptosis, oxidative stress and inflammation during ischemic stroke. The role of PHLDA1 in sevoflurane-induced pyroptosis in developing rats was investigated. Firstly, neonatal rats at day 7 was exposed to 2.0% sevoflurane for 6 h to induce neurotoxicity. Pathological analysis showed that sevoflurane anesthesia induced hippocampal injury and reduced the number of neurons. The expression of PHLDA1 was elevated in hippocampus of sevoflurane-treated rats. Secondly, sevoflurane anesthesia-treated neonatal rats were injected with adeno-associated virus serotype (AAV) to mediate knockdown of PHLDA1. Injection with AAV-shPHLDA1 ameliorated sevoflurane-induced hippocampal injury and neurocognitive impairment in rats. Moreover, knockdown of PHLDA1 increased the number of neurons in sevoflurane-treated rats. Silence of PHLDA1 suppressed neuronal apoptosis, and inhibited pyroptosis in sevoflurane-treated rats. Thirdly, PHLDA1 was also elevated in sevoflurane-treated primary neuronal cells. Loss of PHLDA1 also enhanced cell viability and suppressed pyroptosis of sevoflurane-treated primary neuronal cells. Lastly, silence of PHLDA1 reduced protein expression of TRAF6 and p-Rac1 in sevoflurane-treated rats and neuronal cells. Over-expression of TRAF6 attenuated PHLDA1 silence-induced increase of cell viability and decreased pyroptosis in neuronal cells. In conclusion, loss of PHLDA1 protected against sevoflurane-induced pyroptosis in developing rats through inhibition of TRAF6-mediated activation of Rac1.
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Affiliation(s)
- Lijuan Shu
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, Sichuan 610041, China; Department of ICU, West China Second University Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Chunfu Du
- Department of Neurosurgery, Ya'an people's Hospital, Sichuan, Ya'an, Sichuan 625000, China.
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14
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Qi L, Wang Y, Hu H, Li P, Hu H, Li Y, Wang K, Zhao Y, Feng M, Lyu H, Yin J, Shi Y, Wang Y, Li X, Yan S. m 6A methyltransferase METTL3 participated in sympathetic neural remodeling post-MI via the TRAF6/NF-κB pathway and ROS production. J Mol Cell Cardiol 2022; 170:87-99. [PMID: 35717715 DOI: 10.1016/j.yjmcc.2022.06.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 06/06/2022] [Accepted: 06/10/2022] [Indexed: 02/01/2023]
Abstract
OBJECTIVE Sudden cardiac death caused by ventricular arrhythmias (VAs) is the main cause of high mortality in patients with myocardial infarction (MI). Sympathetic neural remodeling caused by inflammation after MI is closely associated with the occurrence of VAs. METTL3, the earliest identified m6A methyltransferase, is critical in mediating inflammatory responses. Our aim was to investigate whether the m6A methyltransferase METTL3 was involved in sympathetic remodeling post-MI and its specific mechanism. METHODS AND RESULTS A rat MI model was established via left coronary artery ligation. The expression of METTL3, TRAF6, NOX2, and NF-κB increased at 3 days and remained elevated at 7 days after MI, as determined via Western blotting. METTL3 was primarily present in macrophages, as determined via immunofluorescence. Intramyocardial injection of lentivirus carrying METTL3-shRNA inhibited METTL3 expression in vivo. Methylated immunoprecipitation-qPCR determined the METTL3 knockdown inhibited the m6A level of TRAF6 mRNA 3'-UTR. The co-immunoprecipitation experiment proved that METTL3 combines with TRAF6. Western blotting showed that silencing METTL3 inhibited TRAF6 level, NF-κB activation, and ROS production; decreased cytokine release (TNF-α and IL-1β); and downregulated nerve growth factor expression. Finally, METTL3 knockdown reduced sympathetic remodeling after MI, as determined via immunofluorescence assays of tyrosine hydroxylase and growth-associated protein 43. Programmed electrical stimulation, renal sympathetic nerve activity recording, and haemodynamic measurements showed that METTL3 inhibition decreased sympathetic activity and improved cardiac function. CONCLUSIONS Downregulation of METTL3 expression attenuated the excessive sympathetic neural remodeling induced by MI, further reducing the incidence of VAs and improving cardiac function. This was partly associated with the inhibition of the TRAF6/NF-κB pathway and ROS production.
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Affiliation(s)
- Lei Qi
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Cardiac Electrophysiology and Arrhythmia, Jinan, China; Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China
| | - Ye Wang
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Cardiac Electrophysiology and Arrhythmia, Jinan, China
| | - Hui Hu
- Department of Cardiology, Jining No. 1 People' Hospital, Jining, China
| | - Pingjiang Li
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Cardiac Electrophysiology and Arrhythmia, Jinan, China; Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China
| | - Hesheng Hu
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Cardiac Electrophysiology and Arrhythmia, Jinan, China
| | - Yan Li
- Medical Research Center, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Cardiac Electrophysiology and Arrhythmia, Jinan, China
| | - Kang Wang
- Department of Cardiology, Shandong Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yuepeng Zhao
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Cardiac Electrophysiology and Arrhythmia, Jinan, China; Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China
| | - Meng Feng
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Cardiac Electrophysiology and Arrhythmia, Jinan, China; Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China
| | - Hangji Lyu
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Cardiac Electrophysiology and Arrhythmia, Jinan, China; Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China
| | - Jie Yin
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Cardiac Electrophysiology and Arrhythmia, Jinan, China
| | - Yugen Shi
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Cardiac Electrophysiology and Arrhythmia, Jinan, China
| | - Yu Wang
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Cardiac Electrophysiology and Arrhythmia, Jinan, China
| | - Xiaolu Li
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Cardiac Electrophysiology and Arrhythmia, Jinan, China
| | - Suhua Yan
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Cardiac Electrophysiology and Arrhythmia, Jinan, China.
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15
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Zhang G, Chen S, Jia J, Liu C, Wang W, Zhang H, Zhen X. Development and Evaluation of Novel Metformin Derivative Metformin Threonate for Brain Ischemia Treatment. Front Pharmacol 2022; 13:879690. [PMID: 35800435 PMCID: PMC9253272 DOI: 10.3389/fphar.2022.879690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Accepted: 05/11/2022] [Indexed: 11/25/2022] Open
Abstract
Epidemiologic data reveal that diabetes patients taking metformin exhibit lower incidence of stroke and better functional outcomes during post-stroke neurologic recovery. We previously demonstrated that chronic post-ischemic administration of metformin improved functional recovery in experimental cerebral ischemia. However, few beneficial effects of metformin on the acute phase of cerebral ischemia were reported either in experimental animals or in stroke patients, which limits the application of metformin in stroke. We hypothesized that slow cellular uptake of metformin hydrochloride may contribute to the lack of efficacy in acute stroke. We recently developed and patented a novel metformin derivative, metformin threonate (SHY-01). Pharmacokinetic profile in vivo and in cultured cells revealed that metformin is more rapidly uptaken and accumulated from SHY-01 than metformin hydrochloride. Accordingly, SHY-01 treatment exhibited more potent and rapid activation of AMP-activated protein kinase (AMPK). Furthermore, SHY-01 elicited a stronger inhibition of microglia activation and more potent neuroprotection when compared to metformin hydrochloride. SHY-01 administration also had superior beneficial effects on neurologic functional recovery in experimental stroke and offered strong protection against acute cerebral ischemia with reduced infarct volume and mortality, as well as the improved sensorimotor and cognitive functions in rats. Collectively, these results indicated that SHY-01 had an improved pharmacokinetic and pharmacological profile and produced more potent protective effects on acute stroke and long-term neurological damage. We propose that SHY-01 is a very promising therapeutic candidate for cerebral ischemic stroke.
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Affiliation(s)
- Gufang Zhang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
- *Correspondence: Xuechu Zhen, ; Gufang Zhang,
| | - Shuangshuang Chen
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Jia Jia
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Chun Liu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Weipeng Wang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
- Department of Pharmaceutical Analysis, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Hongjian Zhang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
- Department of Pharmaceutical Analysis, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Xuechu Zhen
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
- *Correspondence: Xuechu Zhen, ; Gufang Zhang,
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16
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He T, Han C, Liu C, Chen J, Yang H, Zheng L, Waddington JL, Zhen X. Dopamine D1 receptors mediate methamphetamine-induced dopaminergic damage: involvement of autophagy regulation via the AMPK/FOXO3A pathway. Psychopharmacology (Berl) 2022; 239:951-964. [PMID: 35190859 DOI: 10.1007/s00213-022-06097-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 02/15/2022] [Indexed: 01/17/2023]
Abstract
RATIONALE Clinical studies have revealed that methamphetamine abuse increases risk for developing Parkinson's diseases. It is thus important to elucidate the mechanisms by which methamphetamine damages dopaminergic neurons. OBJECTIVES The present study was designed to elucidate the role of the dopamine D1 receptor in methamphetamine-mediated dopaminergic neuronal damage and its underlying mechanisms. METHODS Mice were treated for 4 days with vehicle, methamphetamine, or the D1 agonist SKF38393 and then assessed for locomotion and performance in the pole and rotarod tests. Cellular indices of autophagy, LC3, P62, and Beclin-1, tyrosine hydroxylase, and the AMPK/FOXO3A pathway were analyzed in striatal tissue from treated mice, in PC12 cells, and in D1 receptor mutant mice. RESULTS Repeated treatment with a relatively high dose of methamphetamine for 4 days induced both loss of dopaminergic neurons and activation of autophagy in the striatum as evidenced by increased expression of LC3 and P62. However, such treatment did not induce either loss of dopaminergic neurons or activation of autophagy in D1 receptor knockout mice. D1 receptor-mediated activation of autophagy was also confirmed in vitro using dopaminergic neuronal PC12 cells. Further studies demonstrated that the AMPK/FOXO3A signaling pathway is responsible for D1 receptor-mediated activation of autophagy. CONCLUSIONS The present data indicate a novel mechanism for methamphetamine-induced dopaminergic neuronal damage and reveal an important role for D1 receptors in the neurotoxicity of this drug.
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Affiliation(s)
- Tao He
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, Jiangsu, China
| | - Chaojun Han
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, Jiangsu, China
- College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, 712046, Shaanxi, China
| | - Chun Liu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, Jiangsu, China
| | - Jiaojiao Chen
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, Jiangsu, China
| | - Huicui Yang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, Jiangsu, China
| | - Longtai Zheng
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, Jiangsu, China
| | - John L Waddington
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, Jiangsu, China
- School of Pharmacy and Biomolecular Sciences, RCSI University of Medicine and Health Sciences, Dublin 2, Ireland
| | - Xuechu Zhen
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, Jiangsu, China.
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17
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Zhu G, Cheng Z, Wang Q, Lin C, Lin P, He R, Chen H, Hoffman RM, Ye J. TRAF6 regulates the signaling pathway influencing colorectal cancer function by ubiquitination mechanisms. Cancer Sci 2022; 113:1393-1405. [PMID: 35179811 PMCID: PMC8990288 DOI: 10.1111/cas.15302] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 02/10/2022] [Accepted: 02/12/2022] [Indexed: 12/24/2022] Open
Abstract
Tumor necrosis factor receptor‐associated factor‐6 (TRAF6) is a ubiquitin E3 ligase. TRAF6 plays an important role in tumor invasion and metastasis. However, the specific mechanism by which TRAF6 promotes colorectal cancer (CRC) metastasis is incompletely understood. This study aimed to determine whether TRAF6 affects the LPS‐NF‐κB‐VEGF‐C signaling pathway through ubiquitination, which plays a role in colorectal cancer metastasis. Here, our results showed that TRAF6 affected lymphangiogenesis through the LPS‐NF‐κB‐VEGF‐C signaling pathway. Using ubiquitination experiments, we found that TRAF6 was mainly ubiquitinated with the K63‐linked chains, and LPS promoted ubiquitination of TRAF6 and K63‐linked chains. More importantly, TRAF6 124mut is the main ubiquitination site of TRAF6 interacting with K63‐linked chains. TRAF6 affected the migration, invasion, and lymphatic metastasis of colorectal cancer through its ubiquitination. In subcutaneous xenograft models, TRAF6 124mut inhibited tumor growth. In conclusion, our results provide new insight for studying the mechanism of lymphangiogenesis in colorectal cancer to promote cancer metastasis, which may provide new ideas for tumor immunotherapy.
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Affiliation(s)
- Guangwei Zhu
- Department of Gastrointestinal Surgery, Section, Institute of Abdominal Surgery, Key Laboratory of accurate diagnosis and treatment of cancer, The First Hospital Affiliated to Fujian Medical University, Fuzhou, 350005, China
| | - Zhibin Cheng
- Department of Gastrointestinal Surgery, Section, Institute of Abdominal Surgery, Key Laboratory of accurate diagnosis and treatment of cancer, The First Hospital Affiliated to Fujian Medical University, Fuzhou, 350005, China
| | - Qin Wang
- Department of Gastrointestinal Surgery, Section, Institute of Abdominal Surgery, Key Laboratory of accurate diagnosis and treatment of cancer, The First Hospital Affiliated to Fujian Medical University, Fuzhou, 350005, China
| | - Chunlin Lin
- Department of Gastrointestinal Surgery, Section, Institute of Abdominal Surgery, Key Laboratory of accurate diagnosis and treatment of cancer, The First Hospital Affiliated to Fujian Medical University, Fuzhou, 350005, China.,Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, 350000, China
| | - Penghang Lin
- Department of Gastrointestinal Surgery, Section, Institute of Abdominal Surgery, Key Laboratory of accurate diagnosis and treatment of cancer, The First Hospital Affiliated to Fujian Medical University, Fuzhou, 350005, China.,Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, 350000, China
| | - Ruofan He
- Department of Gastrointestinal Surgery, Section, Institute of Abdominal Surgery, Key Laboratory of accurate diagnosis and treatment of cancer, The First Hospital Affiliated to Fujian Medical University, Fuzhou, 350005, China.,Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, 350000, China
| | - Hui Chen
- Department of Gastrointestinal Surgery, Section, Institute of Abdominal Surgery, Key Laboratory of accurate diagnosis and treatment of cancer, The First Hospital Affiliated to Fujian Medical University, Fuzhou, 350005, China.,Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, 350000, China
| | - Robert M Hoffman
- AntiCancer, Inc, San Diego, CA, U.S.A.,Department of Surgery, University of California, San Diego, CA, U.S.A
| | - Jianxin Ye
- Department of Gastrointestinal Surgery, Section, Institute of Abdominal Surgery, Key Laboratory of accurate diagnosis and treatment of cancer, The First Hospital Affiliated to Fujian Medical University, Fuzhou, 350005, China
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18
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Liu C, Li Y, Wang X. TDAG51-Deficiency Podocytes are Protected from High-Glucose-Induced Damage Through Nrf2 Activation via the AKT-GSK-3β Pathway. Inflammation 2022; 45:1520-1533. [PMID: 35175494 DOI: 10.1007/s10753-022-01638-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 01/25/2022] [Accepted: 01/26/2022] [Indexed: 11/25/2022]
Abstract
T cell death-associated gene 51 (TDAG51) has been implicated in the development of various pathological conditions. However, whether TDAG51 plays a role in diabetic renal disease remains unknown. The current work investigated the possible function of TDAG51 in diabetic renal disease using high-glucose (HG)-stimulated podocytes in vitro. The elevation of TDAG51 was observed in podocytes in response to HG exposure and the glomeruli of diabetic mice. The siRNAs targeting TDAG51 were applied to deplete TDAG51 in HG-stimulated podocytes. Crucially, TDAG51 deficiency was sufficient to decrease the apoptosis, oxidative stress, and inflammation caused by HG. Mechanically, the inhibition of TDAG51 was capable of enhancing the activation of nuclear factor E2-related factor 2 (Nrf2) associated with the upregulation of AKT-glycogen synthase kinase-3β (GSK-3β) pathway. The reduction of AKT abolished the activation of Nrf2 elicited by TDAG51 deficiency. Additionally, the reduction of Nrf2 diminished the anti-HG injury effect elicited by TDAG51 deficiency. Overall, these data demonstrate that TDAG51 deficiency defends against HG-induced podocyte damage through Nrf2 activation by regulating AKT-GSK-3β pathway. This study suggests that TDAG1 may have a potential role in diabetic renal disease by affecting HG-induced podocyte damage.
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Affiliation(s)
- Chuntian Liu
- Department of Geriatrics, The Second Affiliated Hospital of Xi'an Jiaotong University, No. 157 Xiwu Road, Xi'an, 710004, Shaanxi, China.
| | - Yanling Li
- Department of Neurology, The Second Affiliated Hospital of Xi'an Jiaotong University, No. 157 Xiwu Road, Xi'an, 710004, Shaanxi, China
| | - Xiaojuan Wang
- Department of Neurology, The Second Affiliated Hospital of Xi'an Jiaotong University, No. 157 Xiwu Road, Xi'an, 710004, Shaanxi, China
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19
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Transcriptome of human neuroblastoma SH-SY5Y cells in response to 2B protein of enterovirus-A71. Sci Rep 2022; 12:1765. [PMID: 35110649 PMCID: PMC8810792 DOI: 10.1038/s41598-022-05904-6] [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: 10/17/2021] [Accepted: 01/19/2022] [Indexed: 11/09/2022] Open
Abstract
Infection with enterovirus-A71 (EV-A71) can cause hand-foot-mouth disease associated with fatal neurological complications. The host response to EV-A71 has not yet been fully elucidated, thus, hampering the development of a precise therapeutic approach. A nonstructural 2B protein of EV-A71 has been reported to involve with calcium dysregulation and apoptosis induction in human neuroblastoma SH-SY5Y cells. However, the molecular mechanism has not been delineated. To address this, comprehensive study of the gene expression from SH-SY5Y cells transfected with EV-A71 2B was carried out by RNA sequencing and transcriptomic analysis. It was found that the signature of the upregulated genes of SH-SY5Y cells expressing EV-A71 2B involved the Ca2+-related signaling pathways participating gene expression, inflammatory response, apoptosis, and long-term potentiation of the neuron. Protein-protein interaction network analysis revealed that the products encoded by CCL2, RELB, BIRC3, and TNFRSF9 were the most significant hub proteins in the network. It indicated that EV-A71 2B protein might play a role in immunopathogenesis of the central nervous system (CNS) which probably associated with the non-canonical NF-κB pathway. The data suggest that transcriptomic profiling can provide novel information source for studying the neuropathogenesis of EV-A71 infection leading to development of an effective therapeutic measure for CNS complications.
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Peng H, Wang J, Song X, Huang J, Hua H, Wang F, Xu Z, Ma J, Gao J, Zhao J, Nong A, Huang D, Liang B. PHLDA1 Suppresses TLR4-Triggered Proinflammatory Cytokine Production by Interaction With Tollip. Front Immunol 2022; 13:731500. [PMID: 35237256 PMCID: PMC8882599 DOI: 10.3389/fimmu.2022.731500] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Accepted: 01/17/2022] [Indexed: 02/05/2023] Open
Abstract
Pleckstrin homology-like domain, family A, member 1 (PHLDA1) has been reported to be expressed in many mammalian tissues and cells. However, the functions and exact mechanisms of PHLDA1 remain unclear. In this study, we found that PHLDA1 expression was significantly altered in macrophages after exposure to lipopolysaccharide (LPS) in vitro, suggesting that PHLDA1 may be involved in the regulation of TLR4 signaling pathway activated by LPS. PHLDA1 attenuated the production of LPS-stimulated proinflammatory cytokines (TNF-α, IL-6, and IL-1β). Further research showed that the phosphorylation levels of some important signal molecules in TLR4/MyD88-mediated MAPK and NF-κB signaling pathways were reduced by PHLDA1, which in turn impaired the transcription factors NF-κB and AP1 nuclear translocation and their responsive element activities. Furthermore, we found that PHLDA1 repressed LPS-induced proinflammatory cytokine production via binding to Tollip which restrained TLR4 signaling pathway. A mouse model of endotoxemia was established to confirm the above similar results. In brief, our findings demonstrate that PHLDA1 is a negative regulator of LPS-induced proinflammatory cytokine production by Tollip, suggesting that PHLDA1 plays an anti-inflammatory role through inhibiting the TLR4/MyD88 signaling pathway with the help of Tollip. PHLDA1 may be a novel therapeutic target in treating endotoxemia.
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Affiliation(s)
- Hui Peng
- Department of Cell Biology and Genetics, Key Laboratory of Molecular Biology in High Cancer Incidence Coastal Chao Shan Area of Guang Dong Higher Education Institutes, Shantou University Medical College, Shantou, China
- Department of Clinical Laboratory, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
| | - Juping Wang
- Department of Pathophysiology, School of Basic Medical Sciences, Youjiang Medical University for Nationalities, Baise, China
| | - Xuhong Song
- Department of Cell Biology and Genetics, Key Laboratory of Molecular Biology in High Cancer Incidence Coastal Chao Shan Area of Guang Dong Higher Education Institutes, Shantou University Medical College, Shantou, China
| | - Jiangni Huang
- Department of Pathophysiology, School of Basic Medical Sciences, Youjiang Medical University for Nationalities, Baise, China
| | - Haoming Hua
- Department of Pathophysiology, School of Basic Medical Sciences, Youjiang Medical University for Nationalities, Baise, China
| | - Fanlu Wang
- Department of Pathophysiology, School of Basic Medical Sciences, Youjiang Medical University for Nationalities, Baise, China
| | - Ziyun Xu
- Department of Pathophysiology, School of Basic Medical Sciences, Youjiang Medical University for Nationalities, Baise, China
| | - Jing Ma
- Department of Pathophysiology, School of Basic Medical Sciences, Youjiang Medical University for Nationalities, Baise, China
| | - Jie Gao
- Department of Pathophysiology, School of Basic Medical Sciences, Youjiang Medical University for Nationalities, Baise, China
| | - Jing Zhao
- Department of Pathophysiology, School of Basic Medical Sciences, Youjiang Medical University for Nationalities, Baise, China
| | - Anna Nong
- Department of Pathophysiology, School of Basic Medical Sciences, Youjiang Medical University for Nationalities, Baise, China
| | - Dongyang Huang
- Department of Cell Biology and Genetics, Key Laboratory of Molecular Biology in High Cancer Incidence Coastal Chao Shan Area of Guang Dong Higher Education Institutes, Shantou University Medical College, Shantou, China
- *Correspondence: Bin Liang, ; Dongyang Huang,
| | - Bin Liang
- Department of Cell Biology and Genetics, Key Laboratory of Molecular Biology in High Cancer Incidence Coastal Chao Shan Area of Guang Dong Higher Education Institutes, Shantou University Medical College, Shantou, China
- *Correspondence: Bin Liang, ; Dongyang Huang,
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21
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Zhao H, Liu Y, Chen N, Yu H, Liu S, Qian M, Zhang Z. PHLDA1 Blockade Alleviates Cerebral Ischemia/Reperfusion Injury by Affecting Microglial M1/M2 Polarization and NLRP3 Inflammasome Activation. Neuroscience 2022; 487:66-77. [DOI: 10.1016/j.neuroscience.2022.01.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 01/13/2022] [Accepted: 01/20/2022] [Indexed: 10/19/2022]
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22
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Huang W, Lv Q, Xiao Y, Zhong Z, Hu B, Yan S, Yan Y, Zhang J, Shi T, Jiang L, Li W, Lu G. Triggering Receptor Expressed on Myeloid Cells 2 Protects Dopaminergic Neurons by Promoting Autophagy in the Inflammatory Pathogenesis of Parkinson's Disease. Front Neurosci 2021; 15:745815. [PMID: 34867158 PMCID: PMC8641649 DOI: 10.3389/fnins.2021.745815] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 10/12/2021] [Indexed: 12/12/2022] Open
Abstract
Parkinson's disease is a neurodegenerative disorder with an inflammatory response as the core pathogenic mechanism. Previous human genetics findings support the view that the loss of TREM2 function will aggravate neurodegeneration, and TREM2 is one of the most highly expressed receptors in microglia. However, the role of TREM2 in the inflammatory mechanism of PD is not clear. In our study, it was found both in vivo and in vitro that the activation of microglia not only promoted the secretion of inflammatory factors but also decreased the level of TREM2 and inhibited the occurrence of autophagy. In contrast, an increase in the level of TREM2 decreased the expression of inflammatory factors and enhanced the level of autophagy through the p38 MAPK/mTOR pathway. Moreover, increased TREM2 expression significantly decreased the apoptosis of dopaminergic (DA) neurons and improved the motor ability of PD mice. In summary, TREM2 is an important link between the pathogenesis of PD and inflammation. Our study provides a new view for the mechanism of TREM2 in PD and reveals TREM2 as a potential therapeutic target for PD.
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Affiliation(s)
- Wei Huang
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, China.,Department of Neurology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Qiankun Lv
- Department of Neurology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yunfei Xiao
- Institute of Translational Medicine, Nanchang University, Nanchang, China
| | - Zhen Zhong
- Department of Neurology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Binbin Hu
- Department of Neurology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Si Yan
- Department of Neurology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yufang Yan
- Department of Neurology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Junjun Zhang
- Department of Neurology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Ting Shi
- Department of Neurology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Lijuan Jiang
- Department of Neurology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Wen Li
- Department of Neurology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Guohui Lu
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, China
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23
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Ruhs S, Griesler B, Huebschmann R, Stroedecke K, Straetz N, Ihling C, Sinz A, Masch A, Schutkowski M, Gekle M, Grossmann C. Modulation of transcriptional mineralocorticoid receptor activity by casein kinase 1. FASEB J 2021; 36:e22059. [PMID: 34847273 DOI: 10.1096/fj.202100977rr] [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: 06/14/2021] [Revised: 10/16/2021] [Accepted: 11/08/2021] [Indexed: 11/11/2022]
Abstract
The mineralocorticoid receptor (MR) with its ligand aldosterone (aldo) physiologically regulates electrolyte homeostasis and blood pressure but it can also lead to pathophysiological effects in the cardiovascular system. Previous results show that posttranslational modifications (PTM) can influence MR signaling and function. Based on in silico and in vitro data, casein kinase 1 (CK1) was predicted as a candidate for MR phosphorylation. To gain a deeper mechanistic insight into MR activation, we investigated the influence of CK1 on MR function in HEK cells. Co-immunoprecipitation experiments indicated that the MR is located in a protein-protein complex with CK1α and CK1ε. Reporter gene assays with pharmacological inhibitors and MR constructs demonstrated that especially CK1ε acts as a positive modulator of GRE activity via the C-terminal MR domains CDEF. CK1 enhanced the binding affinity of aldosterone to the MR, facilitated nuclear translocation and DNA interaction of the MR, and led to expression changes of pathophysiologically relevant genes like Per-1 and Phlda1. By peptide microarray and site-directed mutagenesis experiments, we identified the highly conserved T800 as a direct CK1 phosphorylation site of the MR, which modulates the nuclear import and genomic activity of the receptor. Direct phosphorylation of the MR was unable to fully account for all of the CK1 effects on MR signaling, suggesting additional phosphorylation of MR co-regulators. By LC/MS/MS, we identified the MR-associated proteins NOLC1 and TCOF1 as candidates for such CK1-regulated co-factors. Overall, we found that CK1 acts as a co-activator of MR GRE activity through direct and indirect phosphorylation, which accelerates cytosolic-nuclear trafficking, facilitates nuclear accumulation and DNA binding of the MR, and increases the expression of pathologically relevant MR-target genes.
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Affiliation(s)
- Stefanie Ruhs
- Julius Bernstein Institute of Physiology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany.,Department of Anesthesiology and Surgical Intensive Care, University Hospital Halle (Saale), Halle (Saale), Germany
| | - Bruno Griesler
- Julius Bernstein Institute of Physiology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Ralf Huebschmann
- Julius Bernstein Institute of Physiology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Katharina Stroedecke
- Julius Bernstein Institute of Physiology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Nicole Straetz
- Julius Bernstein Institute of Physiology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Christian Ihling
- Department of Pharmaceutical Chemistry & Bioanalytics, Center for Structural Mass Spectrometry, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Andrea Sinz
- Department of Pharmaceutical Chemistry & Bioanalytics, Center for Structural Mass Spectrometry, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Antonia Masch
- Department of Enzymology, Institute of Biochemistry and Biotechnology, Martin Luther University of Halle-Wittenberg, Halle (Saale), Germany
| | - Mike Schutkowski
- Department of Enzymology, Institute of Biochemistry and Biotechnology, Martin Luther University of Halle-Wittenberg, Halle (Saale), Germany
| | - Michael Gekle
- Julius Bernstein Institute of Physiology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Claudia Grossmann
- Julius Bernstein Institute of Physiology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
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Liu W, Tang P, Wang J, Ye W, Ge X, Rong Y, Ji C, Wang Z, Bai J, Fan J, Yin G, Cai W. Extracellular vesicles derived from melatonin-preconditioned mesenchymal stem cells containing USP29 repair traumatic spinal cord injury by stabilizing NRF2. J Pineal Res 2021; 71:e12769. [PMID: 34562326 DOI: 10.1111/jpi.12769] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 09/23/2021] [Accepted: 09/23/2021] [Indexed: 12/27/2022]
Abstract
Spinal cord injury (SCI) is a devastating trauma that leads to irreversible motor and sensory dysfunction and is, so far, without effective treatment. Recently, however, nano-sized extracellular vesicles derived from preconditioned mesenchymal stem cells (MSCs) have shown great promise in treating various diseases, including SCI. In this study, we investigated whether extracellular vesicles (MEVs) derived from MSCs pretreated with melatonin (MT), which is well recognized to be useful in treating diseases, including Alzheimer's disease, non-small cell lung cancer, acute ischemia-reperfusion liver injury, chronic kidney disease, and SCI, are better able to promote functional recovery in mice after SCI than extracellular vesicles derived from MSCs without preconditioning (EVs). MEVs were found to facilitate motor behavioral recovery more than EVs and to increase microglia/macrophages polarization from M1-like to M2-like in mice. Experiments in BV2 microglia and RAW264.7 macrophages confirmed that MEVs facilitate M2-like polarization and also showed that they reduce the production of reactive oxygen species (ROS) and regulate mitochondrial function. Proteomics analysis revealed that ubiquitin-specific protease 29 (USP29) was markedly increased in MEVs, and knockdown of USP29 in MEVs (shUSP29-MEVs) abolished MEVs-mediated benefits in vitro and in vivo. We then showed that USP29 interacts with, deubiquitinates and therefore stabilizes nuclear factor-like 2 (NRF2), thereby regulating microglia/macrophages polarization. In NRF2 knockout mice, MEVs failed to promote functional recovery and M2-like microglia/macrophages polarization. We also showed that MT reduced global N6-methyladenosine (m6 A) modification and levels of the m6 A "writer" methyltransferase-like 3 (METTL3). The stability of USP29 mRNA in MSCs was enhanced by treatment with MT, but inhibited by overexpression of METTL3. This study describes a very promising extracellular vesicle-based approach for treating SCI.
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Affiliation(s)
- Wei Liu
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Pengyu Tang
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jiaxing Wang
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Wu Ye
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Xuhui Ge
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Yuluo Rong
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Chengyue Ji
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Zhuanghui Wang
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jianling Bai
- Department of Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jin Fan
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Guoyong Yin
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Weihua Cai
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
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25
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Zheng LT, Chen J, Zhang L, Zhang Y, Xu L, Hou T, Zhen X, Dai Q, Liu H. Inhibition of neuroinflammation by MIF inhibitor 3-({[4-(4-methoxyphenyl)-6-methyl-2-pyrimidinyl]thio}1methyl)benzoic acid (Z-312). Int Immunopharmacol 2021; 98:107868. [PMID: 34153665 DOI: 10.1016/j.intimp.2021.107868] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/25/2021] [Accepted: 06/06/2021] [Indexed: 10/21/2022]
Abstract
Microglial overactivation-mediated neuroinflammation contributes greatly to the pathogenesis of neurodegenerative diseases, such as Parkinson's disease. Macrophage migration inhibitory factor (MIF) is a pleiotropic proinflammatory cytokine that is involved in the pathophysiology of various inflammatory diseases by inducing various proinflammatory cytokines. Compound 3-({[4-(4-methoxyphenyl)-6-methyl-2-pyrimidinyl]thio}methyl)benzoic acid (Z-312) is a novel small -molecule inhibitor of MIF tautomeric activity. In this study, we investigated the anti-inflammatory effects of Z-312 on liposaccharide (LPS)-induced neuroinflammation in vitro and in vivo. The results showed that Z-312 significantly decreased the production of nitric oxide (NO), interleukin (IL)-1β, tumor necrosis factor (TNF)-α and IL-6 in LPS-stimulated microglial cells. Mechanistically, nuclear translocation of the p65 subunit of nuclear factor (NF)-κB, degradation and phosphorylation of IκBα, NF-κB transcriptional activity and phosphorylation of p38 mitogen-activated protein kinase (MAPK) and JNK were markedly attenuated by pretreatment with Z-312 in BV-2 microglial cells. In addition, Z-312 suppressed the neurotoxic effects of cell culture medium of LPS-activated BV-2 microglia on cocultured mouse HT22 neuroblastoma cells. An in vivo study demonstrated that Z-312 markedly ameliorated microglial activation and subsequent DA neuron loss in an LPS-induced Parkinson's disease (PD) mouse model. These results suggest that MIF inhibitor Z-312 may be a promising neuroprotective agent for the treatment of neuroinflammation-mediated neurological diseases.
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Affiliation(s)
- Long-Tai Zheng
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu 215123, China.
| | - Jiaojiao Chen
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu 215123, China
| | - Li Zhang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu 215123, China
| | - Yu Zhang
- Department of Pharmacy, Xiangyang NO.1 People's Hospital, Hubei University of Medicine, Xiangyang 441000, China
| | - Lei Xu
- Institute of Bioinformatics and Medical Engineering, Jiangsu University of Technology, Changzhou 213001, China
| | - Tingjun Hou
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xuechu Zhen
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu 215123, China
| | - Qijun Dai
- Haian Hospital of Traditional Chinese Medicine, Haian 226600, China
| | - Hua Liu
- Haian Hospital of Traditional Chinese Medicine, Haian 226600, China
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26
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Yang F, Chen R. Loss of PHLDA1 has a protective role in OGD/R-injured neurons via regulation of the GSK-3β/Nrf2 pathway. Hum Exp Toxicol 2021; 40:1909-1920. [PMID: 33938317 DOI: 10.1177/09603271211014596] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Pleckstrin homology-like domain, family A, member 1 (PHLDA1) is a multifunctional protein that plays a role in diverse pathological conditions. However, whether PHLDA1 participates in cerebral ischemia-reperfusion injury has not been reported. The goals of the present work were to assess the possible relationship between PHLDA1 and cerebral ischemia-reperfusion injury. Hippocampal neurons were subjected to oxygen-glucose deprivation/reoxygenation (OGD/R) to simulate cerebral ischemia-reperfusion injury in vitro, which led to significant increases in the expression of PHLDA1. Cellular functional studies showed that the knockdown of PHLDA1 produced a protective role in OGD/R-injured neurons via the down-regulation of neuronal apoptosis, oxidative stress and proinflammatory cytokine release. On the contrary, the overexpression of PHLDA1 rendered neurons more vulnerable to OGD/R injury. In-depth research revealed that the inhibition of PHLDA1 resulted in the enhancement of nuclear factor erythroid 2 like 2 (Nrf2) signaling in OGD/R-injured neurons. The reactivation of glycogen synthase kinase 3β (GSK-3β) abolished the PHLDA1-inhibition-mediated activation of Nrf2 signaling. Moreover, the restraint of Nrf2 signaling diminished the PHLDA1-knockdown-induced neuroprotective effects in OGD/R-injured neurons. In summary, the data of our work show that the loss of PHLDA1 protects against OGD/R injury via potentiating Nrf2 signaling via the regulation of GSK-3β. This work underscores a potential role of PHLDA1 in cerebral ischemia-reperfusion injury and proposes PHLDA1 as an attractive target for the development of neuroprotective therapy.
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Affiliation(s)
- F Yang
- Department of Pharmacy, Xianyang Hospital of Yan'an University, Xianyang, Shaanxi, China
| | - R Chen
- Yizhixin Biotechnology Institute, Xi'an, Shaanxi, China
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27
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Luo YH, Huang ZT, Zong KZ, Cao ZR, Peng DD, Zhou BY, Shen A, Yan P, Wu ZJ. miR-194 ameliorates hepatic ischemia/reperfusion injury via targeting PHLDA1 in a TRAF6-dependent manner. Int Immunopharmacol 2021; 96:107604. [PMID: 33839577 DOI: 10.1016/j.intimp.2021.107604] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 03/09/2021] [Accepted: 03/18/2021] [Indexed: 02/07/2023]
Abstract
Hepatic ischemia/reperfusion injury (IRI) is an inevitable pathological process in liver resection, shock and transplantation. However, the internal mechanism of hepatic IRI, including inflammatory transduction of multiple signaling pathways, is not fully understood. In the present study, we identified pleckstrin homology-like domain family member 1 (PHLDA1), suppressed by microRNA (miR)-194, as a critical intersection of dual inflammatory signals in hepatic IRI. PHLDA1 was upregulated in hepatic IRI with a concomitant downregulation of miR-194. Overexpression of miR-194 diminished PHLDA1 and inhibitors of the nuclear factor kappa-B kinase (IKK) pathway, thus leading to remission of hepatic pathological injury, apoptosis and release of cytokines. Further enrichment of PHLDA1 reversed the function of miR-194 both in vivo and in vitro. For an in-depth query, we verified PHLDA1 as a direct target of miR-194. Notably, inflammatory signal transduction of PHLDA1 was induced by activating TNF receptor-associated factor 6 (TRAF6), sequentially initiating IKK and mitogen-activated protein kinase (MAPK), both of which aggravate stress and inflammation in hepatic IRI. In conclusion, the miR-194/PHLDA1 axis was a key upstream regulator of IKK and MAPK in hepatic IRI. Targeting PHLDA1 might be a potential strategy for hepatic IRI therapy.
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Affiliation(s)
- Yun-Hai Luo
- The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Zuo-Tian Huang
- The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Ke-Zhen Zong
- The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Zhen-Rui Cao
- The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Da-Di Peng
- The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Bao-Yong Zhou
- The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Ai Shen
- Hepatobiliary Pancreatic Tumor Center, Chongqing University Cancer Hospital, Chongqing 400030, China
| | - Ping Yan
- The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Zhong-Jun Wu
- The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China.
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28
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The m6A methyltransferase METTL3 promotes LPS-induced microglia inflammation through TRAF6/NF-κB pathway. Neuroreport 2020; 33:243-251. [PMID: 33165191 DOI: 10.1097/wnr.0000000000001550] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES Microglia are the main effectors in the inflammatory process of the central nervous system. Once overactivated, microglia may release pro-inflammatory cytokines (IL-1β, IL-6, TNF-α and IL-18, etc.) and accelerate neurodegeneration. Here, we aimed to explore the mechanism of how m6A methyltransferase METTL3 affects the inflammatory response of microglia, appropriately inhibiting the overactivation of microglia. MATERIALS AND METHODS Lipopolysaccharide (LPS) was used to construct a cellular inflammation model in vitro. To evaluate the expression of METTL3 and inflammatory cytokines (IL-1β, IL-6, TNF-α and IL-18) in cells, RT-PCR and ELISA were carried out. The related protein (TRAF6, NF-κB and I-κB) expression was examined adopting Western blot. Dot blot experiment was used to assess the effect of regulating METTL3 on the m6A level. Methylated RNA immunoprecipitation reaction was used to measure the effect of METTL3 on the m6A level of TRAF6 mRNA 3'-UTR. The co-immunoprecipitation experiment (IP) proved that METTL3 combines with TRAF6. RESULTS In LPS-mediated microglial inflammation, METTL3 expression was increased, and the expression of inflammatory cytokines (IL-1β, IL-6, TNF-α and IL-18) and inflammatory proteins (TRAF6 and NF-κB) were upregulated. METTL3 level was positively correlated with TRAF6, and the two proteins could bind to each other. Overexpression of METTL3 promoted the activation of the TRAF6-NF-κB pathway in an m6A-dependent manner, and inhibiting NF-κB attenuated METTL3-mediated microglial activation. CONCLUSION METTL3 promotes LPS-induced microglial inflammation by activating the TRAF6-NF-κB pathway.
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