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Bale R, Doshi G. Deciphering the role of siRNA in anxiety and depression. Eur J Pharmacol 2024; 981:176868. [PMID: 39128805 DOI: 10.1016/j.ejphar.2024.176868] [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: 01/04/2024] [Revised: 07/02/2024] [Accepted: 08/05/2024] [Indexed: 08/13/2024]
Abstract
Anxiety and depression are central nervous system illnesses that are among the most prevalent medical concerns of the twenty-first century. Patients with this condition and their families bear psychological, financial, and societal hardship. There are currently restrictions when utilizing the conventional course of treatment. RNA interference is expected to become an essential approach in anxiety and depression due to its potent and targeted gene silencing. Silencing of genes by post-transcriptional modification is the mechanism of action of small interfering RNA (siRNA). The suppression of genes linked to disease is typically accomplished by siRNA molecules in an efficient and targeted manner. Unfavourable immune responses, off-target effects, naked siRNA instability, nuclease vulnerability, and the requirement to create an appropriate delivery method are some of the challenges facing the clinical application of siRNA. This review focuses on the use of siRNA in the treatment of anxiety and depression.
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Affiliation(s)
- Rajeshwari Bale
- Department of Pharmacology, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, V L M Road, Vile Parle (w), Mumbai, 400056, India
| | - Gaurav Doshi
- Department of Pharmacology, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, V L M Road, Vile Parle (w), Mumbai, 400056, India.
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2
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Li N, Du J, Yang Y, Zhao T, Wu D, Peng F, Wang D, Kong L, Zhou W, Hao A. Microglial PCGF1 alleviates neuroinflammation associated depressive behavior in adolescent mice. Mol Psychiatry 2024:10.1038/s41380-024-02714-2. [PMID: 39215186 DOI: 10.1038/s41380-024-02714-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 08/15/2024] [Accepted: 08/22/2024] [Indexed: 09/04/2024]
Abstract
Epigenetics plays a crucial role in regulating gene expression during adolescent brain maturation. In adolescents with depression, microglia-mediated chronic neuroinflammation may contribute to the activation of cellular signaling cascades and cause central synapse loss. However, the exact mechanisms underlying the epigenetic regulation of neuroinflammation leading to adolescent depression remain unclear. In this study, we found that the expression of polycomb group 1 (PCGF1), an important epigenetic regulator, was decreased both in the plasma of adolescent major depressive disorder (MDD) patients and in the microglia of adolescent mice in a mouse model of depression. We demonstrated that PCGF1 alleviates neuroinflammation mediated by microglia in vivo and in vitro, reducing neuronal damage and improving depression-like behavior in adolescent mice. Mechanistically, PCGF1 inhibits the transcription of MMP10 by upregulating RING1B/H2AK119ub and EZH2/H3K27me3 in the MMP10 promoter region, specifically inhibiting microglia-mediated neuroinflammation. These results provide valuable insights into the pathogenesis of adolescent depression, highlighting potential links between histone modifications, neuroinflammation and nerve damage. Potential mechanisms of microglial PCGF1 regulates depression-like behavior in adolescent mice. Microglial PCGF1 inhibits NF-κB/MAPK pathway activation through regulation of RING1B/H2AK119ub and EZH2/H3K27me3 in the MMP10 promoter region, which attenuates neuroinflammation and ameliorates depression-like behaviors in adolescent mice.
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Affiliation(s)
- Naigang Li
- Key Laboratory for Experimental Teratology of Ministry of Education, Shandong Key Laboratory of Mental Disorders, Department of Anatomy and Histoembryology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Jingyi Du
- Key Laboratory for Experimental Teratology of Ministry of Education, Shandong Key Laboratory of Mental Disorders, Department of Anatomy and Histoembryology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Ying Yang
- Childhood Psychiatry Unit, Shandong Mental Health Center, Jinan, China
| | - Tiantian Zhao
- Key Laboratory for Experimental Teratology of Ministry of Education, Shandong Key Laboratory of Mental Disorders, Department of Anatomy and Histoembryology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Dong Wu
- Key Laboratory for Experimental Teratology of Ministry of Education, Shandong Key Laboratory of Mental Disorders, Department of Anatomy and Histoembryology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Fan Peng
- Key Laboratory for Experimental Teratology of Ministry of Education, Shandong Key Laboratory of Mental Disorders, Department of Anatomy and Histoembryology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Dongshuang Wang
- Key Laboratory for Experimental Teratology of Ministry of Education, Shandong Key Laboratory of Mental Disorders, Department of Anatomy and Histoembryology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Linghua Kong
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, China.
| | - Wenjuan Zhou
- Key Laboratory for Experimental Teratology of Ministry of Education, Shandong Key Laboratory of Mental Disorders, Department of Anatomy and Histoembryology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China.
| | - Aijun Hao
- Key Laboratory for Experimental Teratology of Ministry of Education, Shandong Key Laboratory of Mental Disorders, Department of Anatomy and Histoembryology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China.
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Zhou W, Shi H, Wang Z, Huang Y, Ni L, Chen X, Liu Y, Li H, Li C, Liu Y. Identification of Highly Repetitive Enhancers with Long-range Regulation Potential in Barley via STARR-seq. GENOMICS, PROTEOMICS & BIOINFORMATICS 2024; 22:qzae012. [PMID: 39167800 DOI: 10.1093/gpbjnl/qzae012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 06/02/2023] [Accepted: 06/25/2023] [Indexed: 08/23/2024]
Abstract
Enhancers are DNA sequences that can strengthen transcription initiation. However, the global identification of plant enhancers is complicated due to uncertainty in the distance and orientation of enhancers, especially in species with large genomes. In this study, we performed self-transcribing active regulatory region sequencing (STARR-seq) for the first time to identify enhancers across the barley genome. A total of 7323 enhancers were successfully identified, and among 45 randomly selected enhancers, over 75% were effective as validated by a dual-luciferase reporter assay system in the lower epidermis of tobacco leaves. Interestingly, up to 53.5% of the barley enhancers were repetitive sequences, especially transposable elements (TEs), thus reinforcing the vital role of repetitive enhancers in gene expression. Both the common active mark H3K4me3 and repressive mark H3K27me3 were abundant among the barley STARR-seq enhancers. In addition, the functional range of barley STARR-seq enhancers seemed much broader than that of rice or maize and extended to ±100 kb of the gene body, and this finding was consistent with the high expression levels of genes in the genome. This study specifically depicts the unique features of barley enhancers and provides available barley enhancers for further utilization.
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Affiliation(s)
- Wanlin Zhou
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu 611130, China
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Haoran Shi
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
- Chengdu Academy of Agricultural and Forestry Sciences, Chengdu 611130, China
| | - Zhiqiang Wang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu 611130, China
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Yuxin Huang
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Lin Ni
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Xudong Chen
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Yan Liu
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Haojie Li
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Caixia Li
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Yaxi Liu
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu 611130, China
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
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4
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Zhang H, Xu L, He Y, Zhang Z, Zhang J, Yu Q, Liu Y, Wang X, Zhang A, Wang K, Fang Y, Chen S. Tat-NR2B9c attenuates oxidative stress via inhibition of PSD95-NR2B-nNOS complex after subarachnoid hemorrhage in rats. Neuropharmacology 2024; 251:109905. [PMID: 38521229 DOI: 10.1016/j.neuropharm.2024.109905] [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: 10/02/2023] [Revised: 12/18/2023] [Accepted: 03/07/2024] [Indexed: 03/25/2024]
Abstract
Oxidative stress plays important roles in the pathogenesis of early brain injury (EBI) after subarachnoid hemorrhage (SAH). Tat-NR2B9c has shown efficacy as a neuroprotective agent in several studies. Here, we identified the neuroprotective role of Tat-NR2B9c after SAH and its related mechanisms. The results showed that Tat-NR2B9c treatment attenuated oxidative stress, therefore alleviated neuronal apoptosis and neurological deficits after SAH. Tat-NR2B9c treatment could alleviate mitochondrial vacuolization induced by SAH. Compared to SAH + vehicle group, Tat-NR2B9c resulted in the decrease of Acetylated superoxide dismutase2 (Ac-SOD2), Bcl-2-associated X protein (Bax) and cleaved-caspase3 (CC3) protein expression, and the up-regulation of Sirtunin 3 (Sirt3) and Bcl-2 protein level. Moreover, Tat-NR2B9c attenuated excitotoxicity by inhibiting the interaction of PSD95-NR2B-nNOS. Our results demonstrated that Tat-NR2B9c inhibited oxidative stress via inhibition of PSD95-NR2B-nNOS complex formation after SAH. Tat-NR2B9c may serve as a potential treatment for SAH induced brain injury.
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Affiliation(s)
- Haocheng Zhang
- Department of Neurosurgery, School of Medicine, The Second Affiliated Hospital, Zhejiang University, Zhejiang Province, Hangzhou, China; Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, Hangzhou, Zhejiang, China
| | - Longbiao Xu
- Department of Neurosurgery, The Third Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - Yezhao He
- Department of Neurosurgery, School of Medicine, The Second Affiliated Hospital, Zhejiang University, Zhejiang Province, Hangzhou, China; Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, Hangzhou, Zhejiang, China
| | - Zeyu Zhang
- Department of Neurosurgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine, China
| | - Jiahao Zhang
- Department of Neurosurgery, School of Medicine, The Second Affiliated Hospital, Zhejiang University, Zhejiang Province, Hangzhou, China; Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, Hangzhou, Zhejiang, China
| | - Qian Yu
- Department of Neurosurgery, School of Medicine, The Second Affiliated Hospital, Zhejiang University, Zhejiang Province, Hangzhou, China; Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, Hangzhou, Zhejiang, China
| | - Yibo Liu
- Department of Neurosurgery, School of Medicine, The Second Affiliated Hospital, Zhejiang University, Zhejiang Province, Hangzhou, China; Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, Hangzhou, Zhejiang, China
| | - Xiaoyu Wang
- Department of Neurosurgery, School of Medicine, The Second Affiliated Hospital, Zhejiang University, Zhejiang Province, Hangzhou, China; Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, Hangzhou, Zhejiang, China
| | - Anke Zhang
- Department of Neurosurgery, School of Medicine, The Second Affiliated Hospital, Zhejiang University, Zhejiang Province, Hangzhou, China; Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, Hangzhou, Zhejiang, China
| | - Kaikai Wang
- Department of Neurosurgery, School of Medicine, The Second Affiliated Hospital, Zhejiang University, Zhejiang Province, Hangzhou, China; Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, Hangzhou, Zhejiang, China
| | - Yuanjian Fang
- Department of Neurosurgery, School of Medicine, The Second Affiliated Hospital, Zhejiang University, Zhejiang Province, Hangzhou, China; Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, Hangzhou, Zhejiang, China.
| | - Sheng Chen
- Department of Neurosurgery, School of Medicine, The Second Affiliated Hospital, Zhejiang University, Zhejiang Province, Hangzhou, China; Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, Hangzhou, Zhejiang, China.
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Zhou T, Zhang L, He L, Lan Y, Ding L, Li L, Wang Z. GSK-126 Attenuates Cell Apoptosis in Ischemic Brain Injury by Modulating the EZH2-H3K27me3-Bcl2l1 Axis. Mol Neurobiol 2024; 61:3369-3383. [PMID: 37989985 DOI: 10.1007/s12035-023-03808-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 11/13/2023] [Indexed: 11/23/2023]
Abstract
Whether epigenetic modifications participate in the cell apoptosis after ischemic stroke remains unclear. Histone 3 tri-methylation at lysine 27 (H3K27me3) is a histone modification that leads to gene silencing and is involved in the pathogenesis of ischemic stroke. Since the expression of many antiapoptotic genes is inhibited in the ischemic brains, here we aimed to offer an epigenetic solution to cell apoptosis after stroke by reversing H3K27me3 levels after ischemia. GSK-126, a specific inhibitor of enhancer of zeste homolog 2 (EZH2), significantly decreased H3K27me3 levels and inhibited middle cerebral artery occlusion (MCAO) induced and oxygen glucose deprivation (OGD) induced cell apoptosis. Moreover, GSK-126 attenuated the apoptosis caused by oxidative stress, excitotoxicity, and excessive inflammatory responses in vitro. The role of H3K27me3 in regulating of the expression of the antiapoptotic molecule B cell lymphoma-2 like 1 (Bcl2l1) explained the antiapoptotic effect of GSK-126. In conclusion, we found that GSK-126 could effectively protect brain cells from apoptosis after cerebral ischemia, and this role of GSK-126 is closely related to an axis that regulates Bcl2l1 expression, beginning with the regulation of EZH2-dependent H3K27me3 modification.
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Affiliation(s)
- Tai Zhou
- Department of Pathophysiology, School of Basic Medical Sciences, Xuzhou Medical University, Xuzhou, China
| | - Lei Zhang
- Department of Pathophysiology, School of Basic Medical Sciences, Xuzhou Medical University, Xuzhou, China
| | - Li He
- Department of Pathophysiology, School of Basic Medical Sciences, Xuzhou Medical University, Xuzhou, China
| | - Yan Lan
- Department of Pathophysiology, School of Basic Medical Sciences, Xuzhou Medical University, Xuzhou, China
| | - Lei Ding
- Department of Pathophysiology, School of Basic Medical Sciences, Xuzhou Medical University, Xuzhou, China
| | - Li Li
- Department of Pathophysiology, School of Basic Medical Sciences, Xuzhou Medical University, Xuzhou, China.
- Laboratory of Clinical and Experimental Pathology, School of Basic Medical Sciences, Xuzhou Medical University, Xuzhou, China.
| | - Zhongcheng Wang
- Department of Pathophysiology, School of Basic Medical Sciences, Xuzhou Medical University, Xuzhou, China.
- Laboratory of Clinical and Experimental Pathology, School of Basic Medical Sciences, Xuzhou Medical University, Xuzhou, China.
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Salman M, Stayton AS, Parveen K, Parveen A, Puchowicz MA, Parvez S, Bajwa A, Ishrat T. Intranasal Delivery of Mitochondria Attenuates Brain Injury by AMPK and SIRT1/PGC-1α Pathways in a Murine Model of Photothrombotic Stroke. Mol Neurobiol 2024; 61:2822-2838. [PMID: 37946007 DOI: 10.1007/s12035-023-03739-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 10/18/2023] [Indexed: 11/12/2023]
Abstract
Ischemic stroke is one of the major causes of morbidity and mortality worldwide. Mitochondria play a vital role in the pathological processes of cerebral ischemic injury, but its transplantation and underlying mechanisms remain unclear. In the present study, we examined the effects of mitochondrial therapy on the modulation of AMPK and SIRT1/PGC-1α signaling pathway, oxidative stress, and NLRP3 inflammasome activation after photothrombotic ischemic stroke (pt-MCAO). The adult male mice were subjected to the pt-MCAO in which the proximal-middle cerebral artery was exposed with a 532-nm laser beam for 4 min by retro-orbital injection of a photosensitive dye (Rose Bengal: 15 mg/kg) before the laser light exposure and isolated mitochondria (100 μg protein) were administered intranasally at 30 min, 24 h, and 48 h following post-stroke. After 72 h, mice were tested for neurobehavioral outcomes and euthanized for infarct volume, brain edema, and molecular analysis. First, we found that mitochondria therapy significantly decreased brain infarct volume and brain edema, improved neurological dysfunction, attenuated ischemic stroke-induced oxidative stress, and neuroinflammation. Second, mitochondria treatment inhibited NLRP3 inflammasome activation. Finally, mitochondria therapy accelerated p-AMPKα(Thr172) and PGC-1α expression and resorted SIRT1 protein expression levels in pt-MCAO mice. In conclusion, our results demonstrate that mitochondria therapy exerts neuroprotective effects by inhibiting oxidative damage and inflammation, mainly dependent on the heightening activation of the AMPK and SIRT1/PGC-1α signaling pathway. Thus, intranasal delivery of mitochondria might be considered a new therapeutic strategy for ischemic stroke treatment.
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Affiliation(s)
- Mohd Salman
- Department of Anatomy and Neurobiology, College of Medicine, The University of Tennessee Health Science Center, 875 Monroe Avenue, Wittenborg Bldg, Room-231, Memphis, TN, 38163, USA.
- Department of Anatomy and Neurobiology, College of Medicine, The University of Tennessee Health Science Center, 875 Monroe Avenue, Wittenborg Bldg, Room-228, Memphis, TN, 38163, USA.
| | - Amanda S Stayton
- Transplant Research Institute, College of Medicine, The University of Tennessee Health Science Center, 71 S Manassas St, Room 418H, Memphis, TN, 38103, USA
| | - Kehkashan Parveen
- Department of Pediatrics, The University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Arshi Parveen
- Department of Anatomy and Neurobiology, College of Medicine, The University of Tennessee Health Science Center, 875 Monroe Avenue, Wittenborg Bldg, Room-231, Memphis, TN, 38163, USA
| | - Michelle A Puchowicz
- Department of Pediatrics, The University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Suhel Parvez
- Department of Medical Elementology and Toxicology, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, 110062, India
| | - Amandeep Bajwa
- Transplant Research Institute, College of Medicine, The University of Tennessee Health Science Center, 71 S Manassas St, Room 418H, Memphis, TN, 38103, USA.
- Department of Genetics, Genomics, and Informatics, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, USA.
- Department of Microbiology, Immunology, and Biochemistry, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, USA.
| | - Tauheed Ishrat
- Department of Anatomy and Neurobiology, College of Medicine, The University of Tennessee Health Science Center, 875 Monroe Avenue, Wittenborg Bldg, Room-231, Memphis, TN, 38163, USA.
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, Memphis, TN, USA.
- Neuroscience Institute, The University of Tennessee Health Science Center, Memphis, TN, USA.
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Wu S, Han L, Zhou M, Li X, Luo L, Wang Z, Yan S, Li F, Chen J, Yang J. LncRNA AOC4P recruits TRAF6 to regulate EZH2 ubiquitination and participates in trophoblast glycolysis and M2 macrophage polarization which is associated with recurrent spontaneous abortion. Int Immunopharmacol 2023; 125:111201. [PMID: 37951195 DOI: 10.1016/j.intimp.2023.111201] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 10/30/2023] [Accepted: 11/06/2023] [Indexed: 11/13/2023]
Abstract
During embryo implantation, trophoblast cells rely on large amounts of energy produced by glycolysis for their rapid growth and invasion. The disorder of trophoblast metabolism may lead to recurrent spontaneous abortion (RSA). Lactate, which is produced by the glycolysis of trophoblast cells during early pregnancy, can promote the polarization of M2 macrophages and maintain an anti-inflammatory environment at the maternal-fetal interface. Our study found that amine oxidase copper-containing 4 pseudogene (AOC4P) was abnormally increased in villi from RSA patients. It inhibited the glycolysis of trophoblast cells and thus hindered the polarization of M2 macrophages. Further studies showed that AOC4P combines with tumor necrosis factor receptor-associated factor 6 (TRAF6) to upregulate TRAF6 expression. TRAF6 acted as an E3 ubiquitin ligase to promote ubiquitination and degradation of zeste homolog 2 (EZH2). These results provided new insights into the important role played by AOC4P at the maternal-fetal interface.
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Affiliation(s)
- Shujuan Wu
- Reproductive Medical Center, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China; Hubei Clinic Research Center for Assisted Reproductive Technology and Embryonic Development, Wuhan, Hubei 430060, China
| | - Lu Han
- Reproductive Medical Center, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China; Hubei Clinic Research Center for Assisted Reproductive Technology and Embryonic Development, Wuhan, Hubei 430060, China
| | - Mengqi Zhou
- Reproductive Medical Center, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China; Hubei Clinic Research Center for Assisted Reproductive Technology and Embryonic Development, Wuhan, Hubei 430060, China
| | - Xing Li
- Department of Obstetrics and Gynecology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Lingbo Luo
- Reproductive Medical Center, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China; Hubei Clinic Research Center for Assisted Reproductive Technology and Embryonic Development, Wuhan, Hubei 430060, China
| | - Zehao Wang
- Reproductive Medical Center, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China; Hubei Clinic Research Center for Assisted Reproductive Technology and Embryonic Development, Wuhan, Hubei 430060, China
| | - Sisi Yan
- Reproductive Medical Center, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China; Hubei Clinic Research Center for Assisted Reproductive Technology and Embryonic Development, Wuhan, Hubei 430060, China
| | - Faminzi Li
- Reproductive Medical Center, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China; Hubei Clinic Research Center for Assisted Reproductive Technology and Embryonic Development, Wuhan, Hubei 430060, China
| | - Jiao Chen
- Reproductive Medical Center, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China; Hubei Clinic Research Center for Assisted Reproductive Technology and Embryonic Development, Wuhan, Hubei 430060, China.
| | - Jing Yang
- Reproductive Medical Center, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China; Hubei Clinic Research Center for Assisted Reproductive Technology and Embryonic Development, Wuhan, Hubei 430060, China.
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8
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Chen M, Fan L, Wu G, Wang H, Gu S. Histone methyltransferase enzyme enhancer of zeste homolog 2 counteracts ischemic brain injury via H3K27me3-mediated regulation of PI3K/AKT/mTOR signaling pathway. ENVIRONMENTAL TOXICOLOGY 2023; 38:2240-2255. [PMID: 37334851 DOI: 10.1002/tox.23863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 05/27/2023] [Accepted: 05/29/2023] [Indexed: 06/21/2023]
Abstract
BACKGROUND Epigenetic histone methylation plays a crucial role in cerebral ischemic injury, particularly in the context of ischemic stroke. However, the complete understanding of regulators involved in histone methylation, such as Enhancer of Zeste Homolog 2 (EZH2), along with their functional effects and underlying mechanisms, remains incomplete. METHODS Here, we employed a rat model of MCAO (Middle cerebral artery occlusion) and an OGD (Oxygen-Glucose Deprivation) model of primary cortical neurons to study the role of EZH2 and H3K27me3 in cerebral ischemia-reperfusion injury. The infarct volume was measured through TTC staining, while cell apoptosis was detected using TUNEL staining. The mRNA expression levels were quantified through quantitative real-time polymerase chain reaction (qPCR), whereas protein expressions were evaluated via western blotting and immunofluorescence experiments. RESULTS The expression levels of EZH2 and H3K27me3 were upregulated in OGD; these expression levels were further enhanced by GSK-J4 but reduced by EPZ-6438 and AKT inhibitor (LY294002) under OGD conditions. Similar trends were observed for mTOR, AKT, and PI3K while contrasting results were noted for UTX and JMJD3. The phosphorylation levels of mTOR, AKT, and PI3K were activated by OGD, further stimulated by GSK-J4, but inhibited by EPZ-6438 and AKT inhibitor. Inhibition of EZH2 or AKT effectively counteracted OGD-/MCAO-induced cell apoptosis. Additionally, inhibition of EZH2 or AKT mitigated MCAO-induced infarct size and neurological deficit in vivo. CONCLUSIONS Collectively, our results demonstrate that EZH2 inhibition exerts a protective effect against ischemic brain injury by modulating the H3K27me3/PI3K/AKT/mTOR signaling pathway. The results provide novel insights into potential therapeutic mechanisms for stroke treatment.
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Affiliation(s)
- Miao Chen
- Department of Emergency, The First Affiliated Hospital of Hainan Medical University, Haikou, People's Republic of China
| | - Limin Fan
- The Institute for Biomedical Engineering and Nano Science, Tongji University School of Medicine, Shanghai, People's Republic of China
| | - Guoping Wu
- Department of Emergency, Sansha People's Hospital, Sansha, People's Republic of China
| | - Hairong Wang
- Department of Emergency, Xinhua Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Shuo Gu
- Department of Pediatric Neurosurgery, The First Affiliated Hospital of Hainan Medical University, Haikou, People's Republic of China
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9
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Sun L, Li X, Luo H, Guo H, Zhang J, Chen Z, Lin F, Zhao G. EZH2 can be used as a therapeutic agent for inhibiting endothelial dysfunction. Biochem Pharmacol 2023; 213:115594. [PMID: 37207700 DOI: 10.1016/j.bcp.2023.115594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 05/01/2023] [Accepted: 05/04/2023] [Indexed: 05/21/2023]
Abstract
Enhancer of zeste homolog 2 (EZH2) is a catalytic subunit of polycomb repressor complex 2 and plays important roles in endothelial cell homeostasis. EZH2 functionally methylates lysine 27 of histone H3 and represses gene expression through chromatin compaction. EZH2 mediates the effects of environmental stimuli by regulating endothelial functions, such as angiogenesis, endothelial barrier integrity, inflammatory signaling, and endothelial mesenchymal transition. Numerous studies have been conducted to determine the significance of EZH2 in endothelial function. The aim of this review is to provide a concise summary of the roles EZH2 plays in endothelial function and elucidate its therapeutic potential in cardiovascular diseases.
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Affiliation(s)
- Li Sun
- Cardiovascular Research Center, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453100, China; Key Laboratory of Cardiovascular Injury and Repair Medicine of Henan, Weihui, China
| | - Xuefang Li
- Cardiovascular Research Center, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453100, China; Key Laboratory of Cardiovascular Injury and Repair Medicine of Henan, Weihui, China
| | - Hui Luo
- Cardiovascular Research Center, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453100, China; Key Laboratory of Cardiovascular Injury and Repair Medicine of Henan, Weihui, China
| | - Huige Guo
- Cardiovascular Research Center, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453100, China; Key Laboratory of Cardiovascular Injury and Repair Medicine of Henan, Weihui, China
| | - Jie Zhang
- Cardiovascular Research Center, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453100, China; Key Laboratory of Cardiovascular Injury and Repair Medicine of Henan, Weihui, China
| | - Zhigang Chen
- Cardiovascular Research Center, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453100, China; Key Laboratory of Cardiovascular Injury and Repair Medicine of Henan, Weihui, China
| | - Fei Lin
- Cardiovascular Research Center, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453100, China; Key Laboratory of Cardiovascular Injury and Repair Medicine of Henan, Weihui, China.
| | - Guoan Zhao
- Cardiovascular Research Center, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453100, China; Key Laboratory of Cardiovascular Injury and Repair Medicine of Henan, Weihui, China.
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10
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Mannino D, Scuderi SA, Casili G, Bova V, Cucinotta L, Lanza M, Filippone A, Esposito E, Paterniti I. Neuroprotective effects of GSK-343 in an in vivo model of MPTP-induced nigrostriatal degeneration. J Neuroinflammation 2023; 20:155. [PMID: 37391829 DOI: 10.1186/s12974-023-02842-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Accepted: 06/24/2023] [Indexed: 07/02/2023] Open
Abstract
Parkinson's disease (PD) is characterized by the degeneration of dopaminergic nigrostriatal neurons, which causes disabling motor disorders. Scientific findings support the role of epigenetics mechanism in the development and progression of many neurodegenerative diseases, including PD. In this field, some studies highlighted an upregulation of Enhancer of zeste homolog 2 (EZH2) in the brains of PD patients, indicating the possible pathogenic role of this methyltransferase in PD. The aim of this study was to evaluate the neuroprotective effects of GSK-343, an EZH2 inhibitor, in an in vivo model of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced dopaminergic degeneration. Specifically, nigrostriatal degeneration was induced by MPTP intraperitoneal injection. GSK-343 was administered intraperitoneally daily at doses of 1 mg/kg, 5 mg/kg and 10 mg/kg, mice were killed 7 days after MPTP injection. Our results demonstrated that GSK-343 treatment significantly improved behavioral deficits and reduced the alteration of PD hallmarks. Furthermore, GSK-343 administration significantly attenuated the neuroinflammatory state through the modulation of canonical and non-canonical NF-κB/IκBα pathway as well as the cytokines expression and glia activation, also reducing the apoptosis process. In conclusion, the obtained results provide further evidence that epigenetic mechanisms play a pathogenic role in PD demonstrating that the inhibition of EZH2, mediated by GSK-343, could be considered a valuable pharmacological strategy for PD.
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Affiliation(s)
- Deborah Mannino
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D'Alcontres, 31, 98166, Messina, Italy
| | - Sarah Adriana Scuderi
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D'Alcontres, 31, 98166, Messina, Italy
| | - Giovanna Casili
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D'Alcontres, 31, 98166, Messina, Italy
| | - Valentina Bova
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D'Alcontres, 31, 98166, Messina, Italy
| | - Laura Cucinotta
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D'Alcontres, 31, 98166, Messina, Italy
| | - Marika Lanza
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D'Alcontres, 31, 98166, Messina, Italy
| | - Alessia Filippone
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D'Alcontres, 31, 98166, Messina, Italy
| | - Emanuela Esposito
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D'Alcontres, 31, 98166, Messina, Italy.
| | - Irene Paterniti
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D'Alcontres, 31, 98166, Messina, Italy
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11
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Mohamadzadeh O, Hajinouri M, Moammer F, Tamehri Zadeh SS, Omid Shafiei G, Jafari A, Ostadian A, Talaei Zavareh SA, Hamblin MR, Yazdi AJ, Sheida A, Mirzaei H. Non-coding RNAs and Exosomal Non-coding RNAs in Traumatic Brain Injury: the Small Player with Big Actions. Mol Neurobiol 2023; 60:4064-4083. [PMID: 37020123 DOI: 10.1007/s12035-023-03321-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 03/14/2023] [Indexed: 04/07/2023]
Abstract
Nowadays, there is an increasing concern regarding traumatic brain injury (TBI) worldwide since substantial morbidity is observed after it, and the long-term consequences that are not yet fully recognized. A number of cellular pathways related to the secondary injury in brain have been identified, including free radical production (owing to mitochondrial dysfunction), excitotoxicity (regulated by excitatory neurotransmitters), apoptosis, and neuroinflammatory responses (as a result of activation of the immune system and central nervous system). In this context, non-coding RNAs (ncRNAs) maintain a fundamental contribution to post-transcriptional regulation. It has been shown that mammalian brains express high levels of ncRNAs that are involved in several brain physiological processes. Furthermore, altered levels of ncRNA expression have been found in those with traumatic as well non-traumatic brain injuries. The current review highlights the primary molecular mechanisms participated in TBI that describes the latest and novel results about changes and role of ncRNAs in TBI in both clinical and experimental research.
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Affiliation(s)
- Omid Mohamadzadeh
- Department of Neurological Surgery, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahsasadat Hajinouri
- Department of Psychiatry, Roozbeh Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Farzaneh Moammer
- Student Research Committee, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran
| | | | | | - Ameneh Jafari
- Advanced Therapy Medicinal Product (ATMP) Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, Iran
- Proteomics Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Amirreza Ostadian
- Department of Laboratory Medicine, School of Allied Medical Sciences, Kashan University of Medical Sciences, Kashan, Iran
| | | | - Michael R Hamblin
- Laser Research Centre, Faculty of Health Science, University of Johannesburg, Doornfontein, 2028, South Africa
| | | | - Amirhossein Sheida
- School of Medicine, Kashan University of Medical Sciences, Kashan, Iran.
- Student Research Committee, Kashan University of Medical Sciences, Kashan, Iran.
| | - Hamed Mirzaei
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Islamic Republic of Iran.
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12
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Weng HR, Taing K, Chen L, Penney A. EZH2 Methyltransferase Regulates Neuroinflammation and Neuropathic Pain. Cells 2023; 12:1058. [PMID: 37048131 PMCID: PMC10093242 DOI: 10.3390/cells12071058] [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: 02/28/2023] [Revised: 03/24/2023] [Accepted: 03/29/2023] [Indexed: 04/03/2023] Open
Abstract
Recent studies by us and others have shown that enhancer of zeste homolog-2 (EZH2), a histone methyltransferase, in glial cells regulates the genesis of neuropathic pain by modulating the production of proinflammatory cytokines and chemokines. In this review, we summarize recent advances in this research area. EZH2 is a subunit of polycomb repressive complex 2 (PRC2), which primarily serves as a histone methyltransferase to catalyze methylation of histone 3 on lysine 27 (H3K27), ultimately resulting in transcriptional repression. Animals with neuropathic pain exhibit increased EZH2 activity and neuroinflammation of the injured nerve, spinal cord, and anterior cingulate cortex. Inhibition of EZH2 with DZNep or GSK-126 ameliorates neuroinflammation and neuropathic pain. EZH2 protein expression increases upon activation of Toll-like receptor 4 and calcitonin gene-related peptide receptors, downregulation of miR-124-3p and miR-378 microRNAs, or upregulation of Lncenc1 and MALAT1 long noncoding RNAs. Genes suppressed by EZH2 include suppressor of cytokine signaling 3 (SOCS3), nuclear factor (erythroid-derived 2)-like-2 factor (NrF2), miR-29b-3p, miR-146a-5p, and brain-specific angiogenesis inhibitor 1 (BAI1). Pro-inflammatory mediators facilitate neuronal activation along pain-signaling pathways by sensitizing nociceptors in the periphery, as well as enhancing excitatory synaptic activities and suppressing inhibitory synaptic activities in the CNS. These studies collectively reveal that EZH2 is implicated in signaling pathways known to be key players in the process of neuroinflammation and genesis of neuropathic pain. Therefore, targeting the EZH2 signaling pathway may open a new avenue to mitigate neuroinflammation and neuropathic pain.
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Affiliation(s)
- Han-Rong Weng
- Department of Basic Sciences, California Northstate University College of Medicine, Elk Grove, CA 95757, USA
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13
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Kaur P, Verma S, Kushwaha PP, Gupta S. EZH2 and NF-κB: A context-dependent crosstalk and transcriptional regulation in cancer. Cancer Lett 2023; 560:216143. [PMID: 36958695 DOI: 10.1016/j.canlet.2023.216143] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 03/14/2023] [Accepted: 03/21/2023] [Indexed: 03/25/2023]
Abstract
Epigenetic modifications regulate critical biological processes that play a pivotal role in the pathogenesis of cancer. Enhancer of Zeste Homolog 2 (EZH2), a subunit of the Polycomb-Repressive Complex 2, catalyzes trimethylation of histone H3 on Lys 27 (H3K27) involved in gene silencing. EZH2 is amplified in human cancers and has roles in regulating several cellular processes, including survival, proliferation, invasion, and self-renewal. Though EZH2 is responsible for gene silencing through its canonical role, it also regulates the transcription of several genes promoting carcinogenesis via its non-canonical role. Constitutive activation of Nuclear Factor-kappaB (NF-κB) plays a crucial role in the development and progression of human malignancies. NF-κB is essential for regulating innate and adaptive immune responses and is one of the most important molecules that increases survival during carcinogenesis. Given the evidence that increased survival and proliferation are essential for tumor development and their association with epigenetic modifications, it seems plausible that EZH2 and NF-κB crosstalk may promote cancer progression. In this review, we expand on how EZH2 and NF-κB regulate cellular responses during cancer and their crosstalk of the canonical and non-canonical roles in a context-dependent manner.
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Affiliation(s)
- Parminder Kaur
- Department of Urology, Case Western Reserve University, Cleveland, OH, 44016, USA; The Urology Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, 44016, USA
| | - Shiv Verma
- Department of Urology, Case Western Reserve University, Cleveland, OH, 44016, USA; The Urology Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, 44016, USA
| | - Prem Prakash Kushwaha
- Department of Urology, Case Western Reserve University, Cleveland, OH, 44016, USA; The Urology Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, 44016, USA
| | - Sanjay Gupta
- Department of Urology, Case Western Reserve University, Cleveland, OH, 44016, USA; The Urology Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, 44016, USA; Department of Pharmacology, Case Western Reserve University, Cleveland, OH, 44016, USA; Department of Pathology, Case Western Reserve University, Cleveland, OH, 44016, USA; Department of Nutrition, Case Western Reserve University, Cleveland, OH, 44016, USA; Division of General Medical Sciences, Case Comprehensive Cancer Center, Cleveland, OH, 44106, USA.
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14
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Gu T, Xu C, Meng X, Gao D, Jiang G, Yin A, Liu Q, Zhang L. Sevoflurane Preconditioning Alleviates Posttraumatic Stress Disorder-Induced Apoptosis in the Hippocampus via the EZH2-Regulated Akt/mTOR Axis and Improves Synaptic Plasticity. J Mol Neurosci 2023; 73:225-236. [PMID: 36930428 DOI: 10.1007/s12031-023-02114-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 03/11/2023] [Indexed: 03/18/2023]
Abstract
Posttraumatic stress disorder (PTSD) is a persistent and severe psychological and mental disorder resulting from experiences of serious trauma or stress and is suffered by many individuals. Previous studies have shown that pretreatment with sevoflurane is efficient in reducing the incidence of PTSD. However, we require a more comprehensive understanding of the specific mechanisms by which sevoflurane works. Enhancer of zeste homolog 2 (EZH2) has been reported to be regulated by sevoflurane, and to improve patient cognition. In this study, we aimed to explore the mechanisms of sevoflurane and the role of EZH2 in PTSD cases. We explored the effects of sevoflurane and EPZ-6438 (inhibitor of EZH2) on rat behavior, followed by an investigation of EZH2 mRNA and protein expression. The effects of sevoflurane and EZH2 on neuronal survival were assessed by western blotting and TUNEL staining, while western blotting was used to examine the expression of PSD95 and the AKT/mTOR proteins. Sevoflurane preconditioning restored EZH2 expression and significantly inhibited apoptosis by regulating phosphorylation of the AKT/mTOR pathway. Synaptic plasticity was also significantly improved. These results suggest that pretreatment with sevoflurane could play an important role in PTSD prevention by regulating EZH2 expression.
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Affiliation(s)
- Tingting Gu
- Department of Anesthesiology, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Chang Xu
- Department of Anesthesiology, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Xiaozhou Meng
- Department of Anesthesiology, Jinling Hospital, Medical College of Nanjing Medical University, Nanjing, China
| | - Dapeng Gao
- Department of Anesthesiology, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Guanghao Jiang
- Department of Anesthesiology, Yancheng First Hospital, Affiliated Hospital of Nanjing University Medical School, Yancheng, China
| | - Anqi Yin
- Department of Anesthesiology, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Qingzhen Liu
- Department of Anesthesiology, Jinling Hospital, Medical School of Nanjing University, Nanjing, China.
| | - Lidong Zhang
- Department of Anesthesiology, Jinling Hospital, Medical School of Nanjing University, Nanjing, China. .,Department of Anesthesiology, Jinling Hospital, Medical College of Nanjing Medical University, Nanjing, China.
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15
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Chen S, Gu X, Li R, An S, Wang Z. Genome-wide Analysis of Histone H3 Lysine 27 Trimethylation Profiles in Sciatic Nerve of Chronic Constriction Injury Rats. Neurochem Res 2023; 48:1945-1957. [PMID: 36763313 DOI: 10.1007/s11064-023-03879-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 01/12/2023] [Accepted: 01/28/2023] [Indexed: 02/11/2023]
Abstract
The histone H3 lysine 27 trimethylation (H3K27me3) is one of the most important chromatin modifications, which is associated with injury-activated gene expression in Schwann cells (SCs). However, the alteration of genome-wide H3K27me3 enrichments in the development of neuropathic pain is still unknown. Here, we applied the chromatin immunoprecipitation sequencing (ChIP-seq) approach to identify the alteration of differential enrichments of H3K27me3 in chronic constriction injury (CCI) sciatic nerve of rats and potential molecular mechanisms underlying the development of neuropathic pain. Our results indicated that CCI increased the numbers of SCs displaying H3K27 methyltransferase enhancer of zeste homolog 2 (EZH2) and H3K27me3 in the sciatic nerve. ChIP-seq data showed that CCI significantly changed H3K27me3 enrichments on gene promoters in the sciatic nerve. Bioinformatics analyses exhibited that genes gaining H3K27me3 were mostly associated with regulation of cell proliferation, response to stress and oxidation-reduction process. Genes losing this mark were enriched in neuronal generation, and MAPK, cAMP as well as ERBB signaling pathways. Importantly, IL1A, CCL2, NOS2, S100A8, BDNF, GDNF, ERBB3 and C3 were identified as key genes in neuropathic pain. CCI led to significant upregulation of key genes in the sciatic nerve. EZH2 inhibitor reversed CCI-induced increases of H3K27me3 and key gene protein levels, which were accompanied by relieved mechanical allodynia and thermal hyperalgesia in CCI rats. These results indicate that genes with differential enrichments of H3K27me3 in SCs function in various cellular processes and pathways, and many are linked to neuropathic pain after peripheral nerve injury.
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Affiliation(s)
- Shuhui Chen
- Department of Human Anatomy, Shandong First Medical University & Shandong Academy of Medical Sciences, 2 Ying Sheng Dong Lu, Taian, 271000, China
| | - Xinpei Gu
- Department of Human Anatomy, Shandong First Medical University & Shandong Academy of Medical Sciences, 2 Ying Sheng Dong Lu, Taian, 271000, China
| | - Ruidi Li
- Department of Human Anatomy, Shandong First Medical University & Shandong Academy of Medical Sciences, 2 Ying Sheng Dong Lu, Taian, 271000, China
| | - Shuhong An
- Department of Human Anatomy, Shandong First Medical University & Shandong Academy of Medical Sciences, 2 Ying Sheng Dong Lu, Taian, 271000, China.
| | - Zhaojin Wang
- Department of Human Anatomy, Shandong First Medical University & Shandong Academy of Medical Sciences, 2 Ying Sheng Dong Lu, Taian, 271000, China.
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16
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Liu B, Yao X, Zhang C, Liu Y, Wei L, Huang Q, Wang M, Zhang Y, Hu D, Wu W. PTK6 inhibits autophagy to promote uveal melanoma tumorigenesis by binding to SOCS3 and regulating mTOR phosphorylation. Cell Death Dis 2023; 14:55. [PMID: 36690663 PMCID: PMC9870980 DOI: 10.1038/s41419-023-05590-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 01/12/2023] [Accepted: 01/13/2023] [Indexed: 01/24/2023]
Abstract
Autophagy dysfunction is one of the common causes of tumor formation and plays an important role in uveal melanoma (UM). However, little is known about the regulatory mechanisms of autophagy in UM. Here, we show that PTK6 can promote the proliferation, migration, and invasion of UM cells by inhibiting autophagy. SOCS3 can inhibit the proliferation, migration, and invasion of UM cells. Overexpression of SOCS3 can partially rescue the PTK6-induced promotion of UM cell proliferation, migration, and invasion. Mechanistically, PTK6 can bind to SOCS3, and SOCS3 can downregulate the expression of PTK6. Furthermore, PTK6 can upregulate the phosphorylation of mTOR to inhibit autophagy. Taken together, our findings demonstrate the functions of PTK6 and SOCS3 in UM cells and targeting the SOCS3-PTK6 signaling axis might be a novel and promising therapeutic strategy for patients with UM.
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Affiliation(s)
- Bo Liu
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical University, Wenzhou, China
| | - Xueting Yao
- Department of Laboratory Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Chaoyang Zhang
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Yufen Liu
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical University, Wenzhou, China
| | - Li Wei
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical University, Wenzhou, China
| | - Qinying Huang
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical University, Wenzhou, China
| | - Mengting Wang
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical University, Wenzhou, China
| | - Yanchen Zhang
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical University, Wenzhou, China
| | - Danning Hu
- Tissue Culture Center, The New York Eye and Ear Infirmary, New York Medical College, Valhalla, New York, USA
| | - Wencan Wu
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China.
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical University, Wenzhou, China.
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17
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Xie K, Zeng J, Wen L, Peng X, Lin Z, Xian G, Guo Y, Yang X, Li P, Xu D, Zeng Q. Abnormally elevated EZH2-mediated H3K27me3 enhances osteogenesis in aortic valve interstitial cells by inhibiting SOCS3 expression. Atherosclerosis 2023; 364:1-9. [PMID: 36455343 DOI: 10.1016/j.atherosclerosis.2022.11.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 10/22/2022] [Accepted: 11/16/2022] [Indexed: 11/24/2022]
Abstract
BACKGROUND AND AIMS The osteogenic transition of aortic valve interstitial cells (AVICs) plays a critical role for the progression of calcific aortic valve disease (CAVD). Enhancer of zeste homolog 2 (EZH2) is an important methyltransferase for histone H3 Lys27 (H3K27) that has been found to be involved in osteogenesis. Here, we investigated the effect and mechanism of EZH2 in CAVD progression. METHODS High throughout mRNA sequencing, qRT-PCR and immunoblot were performed to screen differentially expressed genes in non-CAVD and CAVD aortic valves. To investigate the role of EZH2 and SOCS3 in osteogenesis, AVICs were treated with siRNA, adenovirus and specific inhibitors, then osteogenic markers and mineralized deposits were examined. In vivo, the morphology and function of aortic valves were investigated by HE stain and echocardiography in ApoE-/- mice fed a long-term western diet (WD). RESULTS We discovered that EZH2 was upregulated and SOCS3 was downregulated in calcified aortic valves. In AVICs, inhibition or silencing of EZH2 attenuated the osteogenic responses. On the other hand, demethylases inhibitor (GSK-J4) enhanced osteogenic transition of AVICs. Moreover, SOCS3 knockdown enhanced the expression of osteogenic markers, while SOCS3 overexpression suppressed osteogenesis and calcification. The chromatin immunoprecipitation and restored experiments indicated that EZH2 directly targeted SOCS3 to promote osteogenic responses of AVICs. In vivo, treatment with EZH2 inhibitor through intraperitoneal injection attenuated aortic valve thickening, calcification and dysfunction induced by WD. CONCLUSIONS Collectively, we found that EZH2-mediated H3K27me3 enhanced osteogenesis and microcalcification of AVICs via inhibiting SOCS3 expression, which provides potential targets for future therapeutic interventions of CAVD.
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Affiliation(s)
- Kaiji Xie
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, 510515, Guangzhou, China; Guangdong Provincial Key Laboratory of Shock and Microcirculation, Southern Medical University, 510515, Guangzhou, China; Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), 510005, Guangzhou, China
| | - Jingxin Zeng
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, 510515, Guangzhou, China; Guangdong Provincial Key Laboratory of Shock and Microcirculation, Southern Medical University, 510515, Guangzhou, China; Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), 510005, Guangzhou, China
| | - Liming Wen
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, 510515, Guangzhou, China; Guangdong Provincial Key Laboratory of Shock and Microcirculation, Southern Medical University, 510515, Guangzhou, China; Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), 510005, Guangzhou, China
| | - Xin Peng
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, 510515, Guangzhou, China; Guangdong Provincial Key Laboratory of Shock and Microcirculation, Southern Medical University, 510515, Guangzhou, China; Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), 510005, Guangzhou, China; Huazhong University of Science and Technology Union Shenzhen Hospital, 518052, Shenzhen, China
| | - Zhibin Lin
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, 510515, Guangzhou, China; Guangdong Provincial Key Laboratory of Shock and Microcirculation, Southern Medical University, 510515, Guangzhou, China; Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), 510005, Guangzhou, China
| | - Gaopeng Xian
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, 510515, Guangzhou, China; Guangdong Provincial Key Laboratory of Shock and Microcirculation, Southern Medical University, 510515, Guangzhou, China; Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), 510005, Guangzhou, China
| | - Yuyang Guo
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, 510515, Guangzhou, China; Guangdong Provincial Key Laboratory of Shock and Microcirculation, Southern Medical University, 510515, Guangzhou, China; Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), 510005, Guangzhou, China
| | - Xi Yang
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, 510515, Guangzhou, China; Guangdong Provincial Key Laboratory of Shock and Microcirculation, Southern Medical University, 510515, Guangzhou, China; Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), 510005, Guangzhou, China
| | - Peixin Li
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, 510515, Guangzhou, China; Guangdong Provincial Key Laboratory of Shock and Microcirculation, Southern Medical University, 510515, Guangzhou, China; Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), 510005, Guangzhou, China
| | - Dingli Xu
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, 510515, Guangzhou, China; Guangdong Provincial Key Laboratory of Shock and Microcirculation, Southern Medical University, 510515, Guangzhou, China; Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), 510005, Guangzhou, China.
| | - Qingchun Zeng
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, 510515, Guangzhou, China; Guangdong Provincial Key Laboratory of Shock and Microcirculation, Southern Medical University, 510515, Guangzhou, China; Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), 510005, Guangzhou, China.
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18
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Wen S, Li F, Tang Y, Dong L, He Y, Deng Y, Tao Z. MIR222HG attenuates macrophage M2 polarization and allergic inflammation in allergic rhinitis by targeting the miR146a-5p/TRAF6/NF-κB axis. Front Immunol 2023; 14:1168920. [PMID: 37205104 PMCID: PMC10185836 DOI: 10.3389/fimmu.2023.1168920] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Accepted: 04/13/2023] [Indexed: 05/21/2023] Open
Abstract
Although M2 macrophages are involved in the orchestration of type 2 inflammation in allergic diseases, the mechanisms underlying non-coding RNA (ncRNA)-mediated macrophage polarization in allergic rhinitis (AR) have not been systematically understood. Here, we identified long non-coding RNA (lncRNA) MIR222HG as a key regulator of macrophage polarization and revealed its role in AR. Consistent with our bioinformatic analysis of GSE165934 dataset derived from the Gene Expression Omnibus (GEO) database, lncRNA-MIR222HG and murine mir222hg were downregulated in our clinical samples and animal models of AR, respectively. Mir222hg was upregulated in M1 macrophages and downregulated in M2 macrophages. The allergen-ovalbumin facilitated polarization of RAW264.7 cells to the M2 phenotype, accompanied by the downregulation of mir222hg expression in a dose-dependent manner. Mir222hg facilitates macrophage M1 polarization and reverses M2 polarization caused by ovalbumin. Furthermore, mir222hg attenuates macrophage M2 polarization and allergic inflammation in the AR mouse model. Mechanistically, a series of gain- and loss-of-function experiments and rescue experiments were performed to verify the role of mir222hg as a ceRNA sponge that adsorbed miR146a-5p, upregulated Traf6, and activated the IKK/IκB/P65 pathway. Collectively, the data highlight the remarkable role of MIR222HG in the modulation of macrophage polarization and allergic inflammation, as well as its potential role as a novel AR biomarker or therapeutic target.
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Affiliation(s)
- Silu Wen
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
- Department of Otolaryngology, First College of Clinical Medical Science, Wuhan University, Wuhan, Hubei, China
| | - Fen Li
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
- Institute of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
| | - Yulei Tang
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
- Department of Otolaryngology, First College of Clinical Medical Science, Wuhan University, Wuhan, Hubei, China
| | - Lin Dong
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
- Department of Otolaryngology, First College of Clinical Medical Science, Wuhan University, Wuhan, Hubei, China
| | - Yan He
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
- Department of Otolaryngology, First College of Clinical Medical Science, Wuhan University, Wuhan, Hubei, China
| | - Yuqin Deng
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
- *Correspondence: Zezhang Tao, ; Yuqin Deng,
| | - Zezhang Tao
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
- Institute of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
- *Correspondence: Zezhang Tao, ; Yuqin Deng,
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19
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Wang X, Xu P, Liu Y, Wang Z, Lenahan C, Fang Y, Lu J, Zheng J, Wang K, Wang W, Zhou J, Chen S, Zhang J. New Insights of Early Brain Injury after Subarachnoid Hemorrhage: A Focus on the Caspase Family. Curr Neuropharmacol 2023; 21:392-408. [PMID: 35450528 PMCID: PMC10190145 DOI: 10.2174/1570159x20666220420115925] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 02/10/2022] [Accepted: 04/14/2022] [Indexed: 11/22/2022] Open
Abstract
Spontaneous subarachnoid hemorrhage (SAH), primarily caused by ruptured intracranial aneurysms, remains a prominent clinical challenge with a high rate of mortality and morbidity worldwide. Accumulating clinical trials aiming at the prevention of cerebral vasospasm (CVS) have failed to improve the clinical outcome of patients with SAH. Therefore, a growing number of studies have shifted focus to the pathophysiological changes that occur during the periods of early brain injury (EBI). New pharmacological agents aiming to alleviate EBI have become a promising direction to improve outcomes after SAH. Caspases belong to a family of cysteine proteases with diverse functions involved in maintaining metabolism, autophagy, tissue differentiation, regeneration, and neural development. Increasing evidence shows that caspases play a critical role in brain pathology after SAH. Therefore, caspase regulation could be a potential target for SAH treatment. Herein, we provide an overview pertaining to the current knowledge on the role of caspases in EBI after SAH, and we discuss the promising therapeutic value of caspase-related agents after SAH.
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Affiliation(s)
- Xiaoyu Wang
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Penglei Xu
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yibo Liu
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Zefeng Wang
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Cameron Lenahan
- Center for Neuroscience Research, Loma Linda University School of Medicine, Loma Linda, CA, USA
- Burrell College of Osteopathic Medicine, Las Cruces, New Mexico
| | - Yuanjian Fang
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Jianan Lu
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Jingwei Zheng
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Kaikai Wang
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Wei Wang
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Jingyi Zhou
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Sheng Chen
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
- Department of Neurosurgery, The Affiliated Huzhou Hospital, Zhejiang University School of Medicine (Huzhou Central Hospital), Huzhou, China
| | - Jianming Zhang
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
- Brain Research Institute, Zhejiang University, Hangzhou, Zhejiang, China
- Collaborative Innovation Center for Brain Science, Zhejiang University, Hangzhou, Zhejiang, China
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20
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Ismael S, Patrick D, Salman M, Parveen A, Stanfill AG, Ishrat T. Verapamil inhibits TXNIP-NLRP3 inflammasome activation and preserves functional recovery after intracerebral hemorrhage in mice. Neurochem Int 2022; 161:105423. [PMID: 36244583 DOI: 10.1016/j.neuint.2022.105423] [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: 06/03/2022] [Revised: 09/28/2022] [Accepted: 10/02/2022] [Indexed: 11/08/2022]
Abstract
Intracerebral hemorrhage (ICH) is the second most common type of stroke with no satisfactory treatment. Recent studies from our group and others indicated a potential positive effect of verapamil, a commonly prescribed calcium channel blocker, with thioredoxin-interacting protein (TXNIP) inhibitor properties, in ischemic stroke and cognitive disorders. It is unclear whether there would be a beneficial effect of verapamil administration in ICH. Therefore, this study was designed to determine the neuroprotective effects of verapamil in a murine ICH model. ICH was induced by stereotactic injection of collagenase type VII (0.075 U) into the right striatum of adult male C57BL/6 mice. Verapamil (0.15 mg/kg) or saline was administered intravenously at 1 h post-ICH followed by oral (1 mg/kg/d) administration in drinking water for 28 days. Motor and cognitive function were assessed using established tests for motor coordination, spatial learning, short- and long-term memory. A subset of animals was sacrificed at 72 h after ICH for molecular analysis. Verapamil treatment reduced expression of TXNIP and NOD-like receptor pyrin domain-containing-3 inflammasome activation in the perihematomal area. These protective effects of verapamil were associated with decreased proinflammatory mediators, microglial activation, and blood-brain barrier permeability markers and paralleled less phosphorylated nuclear factor kappa B level. Our findings also demonstrate that long-term low-dose verapamil effectively attenuated motor and cognitive impairments. Taken together, these data indicate that verapamil has therapeutic potential in improving acute motor function after ICH. Further investigations are needed to confirm whether verapamil treatment could be a promising candidate for clinical trials.
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Affiliation(s)
- Saifudeen Ismael
- Department of Anatomy and Neurobiology, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, USA
| | - Devlin Patrick
- Department of Anatomy and Neurobiology, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, USA; Department of Acute and Tertiary Care, College of Nursing, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Mohd Salman
- Department of Anatomy and Neurobiology, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, USA
| | - Arshi Parveen
- Department of Anatomy and Neurobiology, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, USA
| | - Ansley Grimes Stanfill
- Department of Acute and Tertiary Care, College of Nursing, University of Tennessee Health Science Center, Memphis, TN, USA; Neuroscience Institute, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Tauheed Ishrat
- Department of Anatomy and Neurobiology, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, USA; Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, TN, USA; Neuroscience Institute, University of Tennessee Health Science Center, Memphis, TN 38163, USA.
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21
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Jin J, Duan J, Du L, Xing W, Peng X, Zhao Q. Inflammation and immune cell abnormalities in intracranial aneurysm subarachnoid hemorrhage (SAH): Relevant signaling pathways and therapeutic strategies. Front Immunol 2022; 13:1027756. [PMID: 36505409 PMCID: PMC9727248 DOI: 10.3389/fimmu.2022.1027756] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 10/31/2022] [Indexed: 11/25/2022] Open
Abstract
Intracranial aneurysm subarachnoid hemorrhage (SAH) is a cerebrovascular disorder associated with high overall mortality. Currently, the underlying mechanisms of pathological reaction after aneurysm rupture are still unclear, especially in the immune microenvironment, inflammation, and relevant signaling pathways. SAH-induced immune cell population alteration, immune inflammatory signaling pathway activation, and active substance generation are associated with pro-inflammatory cytokines, immunosuppression, and brain injury. Crosstalk between immune disorders and hyperactivation of inflammatory signals aggravated the devastating consequences of brain injury and cerebral vasospasm and increased the risk of infection. In this review, we discussed the role of inflammation and immune cell responses in the occurrence and development of aneurysm SAH, as well as the most relevant immune inflammatory signaling pathways [PI3K/Akt, extracellular signal-regulated kinase (ERK), hypoxia-inducible factor-1α (HIF-1α), STAT, SIRT, mammalian target of rapamycin (mTOR), NLRP3, TLR4/nuclear factor-κB (NF-κB), and Keap1/nuclear factor (erythroid-derived 2)-like 2 (Nrf2)/ARE cascades] and biomarkers in aneurysm SAH. In addition, we also summarized potential therapeutic drugs targeting the aneurysm SAH immune inflammatory responses, such as nimodipine, dexmedetomidine (DEX), fingolimod, and genomic variation-related aneurysm prophylactic agent sunitinib. The intervention of immune inflammatory responses and immune microenvironment significantly reduces the secondary brain injury, thereby improving the prognosis of patients admitted to SAH. Future studies should focus on exploring potential immune inflammatory mechanisms and developing additional therapeutic strategies for precise aneurysm SAH immune inflammatory regulation and genomic variants associated with aneurysm formation.
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Affiliation(s)
- Jing Jin
- Department of Pharmacy, West China Hospital, Sichuan University, Chengdu, Sichuan, China,Department of Biotherapy, Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Jian Duan
- Department of Cerebrovascular Disease, Suining Central Hospital, Suining, Sichuan, China
| | - Leiya Du
- 4Department of Oncology, The Second People Hospital of Yibin, Yibin, Sichuan, China
| | - Wenli Xing
- Department of Cerebrovascular Disease, Suining Central Hospital, Suining, Sichuan, China
| | - Xingchen Peng
- Department of Biotherapy, Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China,*Correspondence: Qijie Zhao, ; Xingchen Peng,
| | - Qijie Zhao
- Department of Pharmacy, West China Hospital, Sichuan University, Chengdu, Sichuan, China,*Correspondence: Qijie Zhao, ; Xingchen Peng,
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22
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Morris-Blanco KC, Chokkalla AK, Arruri V, Jeong S, Probelsky SM, Vemuganti R. Epigenetic mechanisms and potential therapeutic targets in stroke. J Cereb Blood Flow Metab 2022; 42:2000-2016. [PMID: 35854641 PMCID: PMC9580166 DOI: 10.1177/0271678x221116192] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Accumulating evidence indicates a central role for epigenetic modifications in the progression of stroke pathology. These epigenetic mechanisms are involved in complex and dynamic processes that modulate post-stroke gene expression, cellular injury response, motor function, and cognitive ability. Despite decades of research, stroke continues to be classified as a leading cause of death and disability worldwide with limited clinical interventions. Thus, technological advances in the field of epigenetics may provide innovative targets to develop new stroke therapies. This review presents the evidence on the impact of epigenomic readers, writers, and erasers in both ischemic and hemorrhagic stroke pathophysiology. We specifically explore the role of DNA methylation, DNA hydroxymethylation, histone modifications, and epigenomic regulation by long non-coding RNAs in modulating gene expression and functional outcome after stroke. Furthermore, we highlight promising pharmacological approaches and biomarkers in relation to epigenetics for translational therapeutic applications.
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Affiliation(s)
| | - Anil K Chokkalla
- Department of Neurological Surgery, University of Wisconsin-Madison, Madison, WI, USA
| | - Vijay Arruri
- Department of Neurological Surgery, University of Wisconsin-Madison, Madison, WI, USA
| | - Soomin Jeong
- Department of Neurological Surgery, University of Wisconsin-Madison, Madison, WI, USA.,Neuroscience Training Program, University of Wisconsin-Madison, Madison, WI, USA
| | - Samantha M Probelsky
- Department of Neurological Surgery, University of Wisconsin-Madison, Madison, WI, USA
| | - Raghu Vemuganti
- Department of Neurological Surgery, University of Wisconsin-Madison, Madison, WI, USA.,Neuroscience Training Program, University of Wisconsin-Madison, Madison, WI, USA.,William S. Middleton Veterans Administration Hospital, Madison, WI, USA
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23
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Intervention of neuroinflammation in the traumatic brain injury trajectory: In vivo and clinical approaches. Int Immunopharmacol 2022; 108:108902. [DOI: 10.1016/j.intimp.2022.108902] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/25/2022] [Accepted: 05/24/2022] [Indexed: 12/11/2022]
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24
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Hu Q, Du Q, Yu W, Dong X. 2-Methoxyestradiol Alleviates Neuroinflammation and Brain Edema in Early Brain Injury After Subarachnoid Hemorrhage in Rats. Front Cell Neurosci 2022; 16:869546. [PMID: 35558877 PMCID: PMC9087802 DOI: 10.3389/fncel.2022.869546] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 03/29/2022] [Indexed: 01/14/2023] Open
Abstract
Objective Numerous studies have shown that neuroinflammation and brain edema play an important role in early brain injury (EBI) after subarachnoid hemorrhage (SAH). 2-Methoxyestradiol (2-ME) has been shown to have anti-inflammatory and anti-angiogenic effects. This study aimed to investigate the effects of 2-ME on neuroinflammation and brain edema after SAH and its underlying mechanism of action. Methods Rats were used to produce an endovascular puncture model of SAH. 2-ME or the control agent was injected intraperitoneally 1 h after SAH induction. At 24 h after surgery, the neurological score, SAH grading, brain water content, and blood–brain barrier (BBB) permeability were examined. The microglial activation level in the rat brain tissue was determined using immunofluorescence staining, whereas the cell apoptosis in the rat brain tissue was assessed using terminal deoxynucleotidyl transferase dUTP nick-end labeling assay, the levels of Interleukin (IL)-1β, IL-6 and tumor necrosis factor (TNF)-α were measured by enzyme linked immunosorbent assay, and the expression levels of ZO-1, occludin, hypoxia-inducible factor-1α (HIF-1α), vascular endothelial growth factor (VEGF), and matrix metallopeptidase (MMP)-9 in the rat brain tissue were determined using western blotting. Results Twenty-four hours after SAH, brain water content, BBB permeability, microglial activation, and cell apoptosis were significantly increased, whereas neurological function deteriorated significantly in rats. Treatment with 2-ME significantly decreased brain water content, BBB permeability, microglial cell activation, and cell apoptosis and improved neurological dysfunction in rats. Treatment with 2-ME reduced the expression levels of inflammatory factors (IL-1β, IL-6, and TNF-α), which were significantly elevated 24 h after SAH. Treatment with 2-ME alleviated the disruption of tight junction proteins (ZO-1 and occludin), which significantly decreased 24 h after SAH. To further determine the mechanism of this protective effect, we found that 2-ME inhibited the expression of HIF-1α, MMP-9, and VEGF, which was associated with the inflammatory response to EBI and BBB disruption after SAH. Conclusion 2-ME alleviated neuroinflammation and brain edema as well as improved neurological deficits after SAH in rats. The neuroprotective effect of 2-ME on EBI after SAH in rats may be related to the inhibition of neuroinflammation and brain edema.
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Affiliation(s)
- Qiang Hu
- Department of Neurosurgery, The Affiliated Hangzhou Hospital of Nanjing Medical University, Hangzhou, China
- Department of Neurosurgery, Affiliated Hangzhou First People’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Quan Du
- Department of Neurosurgery, The Affiliated Hangzhou Hospital of Nanjing Medical University, Hangzhou, China
- Department of Neurosurgery, Affiliated Hangzhou First People’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Wenhua Yu
- Department of Neurosurgery, The Affiliated Hangzhou Hospital of Nanjing Medical University, Hangzhou, China
- Department of Neurosurgery, Affiliated Hangzhou First People’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Department of Neurosurgery, Hangzhou Ninth People’s Hospital, Hangzhou, China
- *Correspondence: Wenhua Yu,
| | - Xiaoqiao Dong
- Department of Neurosurgery, The Affiliated Hangzhou Hospital of Nanjing Medical University, Hangzhou, China
- Department of Neurosurgery, Affiliated Hangzhou First People’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
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25
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Enhancing S-nitrosoglutathione reductase decreases S-nitrosylation of Drp1 and reduces neuronal apoptosis in experimental subarachnoid hemorrhage both in vivo and in vitro. Brain Res Bull 2022; 183:184-200. [PMID: 35304287 DOI: 10.1016/j.brainresbull.2022.03.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 02/08/2022] [Accepted: 03/12/2022] [Indexed: 12/12/2022]
Abstract
Subarachnoid hemorrhage (SAH) is a hemorrhagic stroke with a high mortality and disability rate. Nitric oxide (NO) can promote blood supply through vasodilation, leading to protein S-nitrosylation. However, the function of S-nitrosylation in neurons after SAH remains unclear. Excessive NO in the pathological state is converted into S-nitrosoglutathione (GSNO) and stored in cells, which leads to high S-nitrosylation of intracellular proteins and causes nitrosative stress. S-nitrosoglutathione reductase (GSNOR) promotes GSNO degradation and protects cells from excessive S-nitrosylation. We conducted an in vivo rat carotid puncture model and an in vitro neuron hemoglobin intervention. The results showed that SAH induction increased NO, GSNO, neuron protein S-nitrosylation, and neuronal apoptosis, while decreasing the level and activity of GSNOR. GSNOR overexpression by lentivirus decreased GSNO but had little effect on NO. GSNOR overexpression also improved short- and long-term neurobehavioral outcomes in rats and alleviated nitrosative stress. Furthermore, GSNOR reduced neuronal apoptosis and played a neuroprotective role by alleviating Drp1 S-nitrosylation, reducing mitochondrial division. Thus, the regulation of GSNOR in early brain injury and neuronal denitrosylation may play an important role in neuroprotection.
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26
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A Systematic Review of Inflammatory Cytokine Changes Following Aneurysmal Subarachnoid Hemorrhage in Animal Models and Humans. Transl Stroke Res 2022; 13:881-897. [PMID: 35260989 DOI: 10.1007/s12975-022-01001-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 02/17/2022] [Accepted: 02/22/2022] [Indexed: 02/07/2023]
Abstract
Aneurysmal subarachnoid hemorrhage (aSAH) is a severe form of stroke that occurs following rupture of a cerebral aneurysm. Acute inflammation and secondary delayed inflammatory responses, both largely controlled by cytokines, work together to create high mortality and morbidity for this group. The trajectory and time course of cytokine change must be better understood in order to effectively manage unregulated inflammation and improve patient outcomes following aSAH. A systematic review was conducted following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Three different search phrases ("cytokines and subarachnoid hemorrhage," "cytokine levels and subarachnoid hemorrhage," and "cytokine measurement and subarachnoid hemorrhage") were applied across three databases (PubMed, SCOPUS, and the Cochrane Library). Our procedures returned 856 papers. After application of inclusion/exclusion criteria, 95 preclinical animal studies and 41 clinical studies remained. Across studies, 22 different cytokines had been investigated, 5 different tissue types were analyzed, and 3 animal models were utilized. Three main pro-inflammatory cytokines (IL-1β, IL-6, and TNF-α) demonstrated reliable increases following aSAH across the included studies. While this is a promising area of research for potential therapeutics, there are gaps in the knowledge base that bar progress for clinical translation of this information. In particular, there is a need for investigations that explore the systemic inflammatory response following injury in a more diverse number of cytokines, the balance of specific pro-/anti- inflammatory cytokines, and how these biomarkers relate to patient outcomes and recovery over time.
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27
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Huang X, Yang Q, Xie L, Lei S. Histone methyltransferase enhancer of zeste 2 polycomb repressive complex 2 subunit exacerbates inflammation in depression rats by modulating microglia polarization. Bioengineered 2022; 13:5509-5524. [PMID: 35172677 PMCID: PMC8973615 DOI: 10.1080/21655979.2022.2036892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Depression is a major cause of emotional agony and degraded living quality. Enhancer of zeste 2 polycomb repressive complex 2 subunit (EZH2) is involved in histone methylation in human diseases. This experiment was designed to investigate the mechanism of EZH2 on depression. Depression rat model was established via the treatment of chronic unpredictable mild stress (CUMS) to identify rat depression-like behaviors. EZH2 expression was determined and then silenced to assess its effect on depression-like behaviors and neuroinflammation. Microglia were isolated, cultured, identified and activated to assess EZH2 expression. Effect of EZH2 on microglia polarization was evaluated. Next, the binding relation between microRNA (miR)-29b-3p and EZH2 or matrix metallopeptidase 2 (MMP2) was analyzed. Levels of miR-29b-3p expression and MMP2 transcription were examined. Additionally, the role of miR-29b-3p in microglia polarization was tested. Depression-like behaviors were exhibited after CUMS induction. EZH2 was overexpressed in CUMS-treated rats and lipopolysaccharide (LPS)-induced microglia. EZH2 silencing reversed depression-like behaviors. EZH2 silencing mitigated inflammation in depression by manipulating microglia M2-type polarization. EZH2 targeted miR-29b-3p expression to promote MMP2 transcription. Inhibition of miR-29b-3p reversed the role of EZH2 silencing in microglia M2-type polarization and promoted inflammation. EZH2 inhibited miR-29b-3p expression by combining with miR-29b-3p promoter and trimethylation of histone H3-lysine 27-trimethylated upregulation, and then elevated MMP2 transcription and triggered microglia M1-type polarization, thus exacerbating depression-like behaviors and neuroinflammation of depression.
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Affiliation(s)
- Xuezhu Huang
- Mental Medicine, College of Wenzhou Medical University, Wenzhou, Zhejiang, China.,Department of Psychosomatic Medicine, Nanchong Central Hospital Affiliated with North Sichuan Medical College, Nanchong, Sichuan, China.,Department of Geriatrics, Kangning Hospital Affiliated with Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Qin Yang
- Department of Psychosomatic Medicine, Nanchong Central Hospital Affiliated with North Sichuan Medical College, Nanchong, Sichuan, China
| | - Lingling Xie
- Department of Geriatrics, Kangning Hospital Affiliated with Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Sihong Lei
- Department of Psychosomatic Medicine, Nanchong Central Hospital Affiliated with North Sichuan Medical College, Nanchong, Sichuan, China
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28
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Benjaskulluecha S, Boonmee A, Pattarakankul T, Wongprom B, Klomsing J, Palaga T. Screening of compounds to identify novel epigenetic regulatory factors that affect innate immune memory in macrophages. Sci Rep 2022; 12:1912. [PMID: 35115604 PMCID: PMC8814160 DOI: 10.1038/s41598-022-05929-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 01/20/2022] [Indexed: 02/05/2023] Open
Abstract
Trained immunity and tolerance are part of the innate immune memory that allow innate immune cells to differentially respond to a second encounter with stimuli by enhancing or suppressing responses. In trained immunity, treatment of macrophages with β-glucan (BG) facilitates the production of proinflammatory cytokines upon lipopolysaccharide (LPS) stimulation. For the tolerance response, LPS stimulation leads to suppressed inflammatory responses during subsequent LPS exposure. Epigenetic reprogramming plays crucial roles in both phenomena, which are tightly associated with metabolic flux. In this study, we performed a screening of an epigenetics compound library that affects trained immunity or LPS tolerance in macrophages using TNFα as a readout. Among the 181 compounds tested, one compound showed suppressive effects, while 2 compounds showed promoting effects on BG-trained TNFα production. In contrast, various inhibitors targeting Aurora kinase, histone methyltransferase, histone demethylase, histone deacetylase and DNA methyltransferase showed inhibitory activity against LPS tolerance. Several proteins previously unknown to be involved in innate immune memory, such as MGMT, Aurora kinase, LSD1 and PRMT5, were revealed. Protein network analysis revealed that the trained immunity targets are linked via Trp53, while LPS tolerance targets form three clusters of histone-modifying enzymes, cell division and base-excision repair. In trained immunity, the histone lysine methyltransferase SETD7 was identified, and its expression was increased during BG treatment. Level of the histone lysine demethylase, LSD1, increased during LPS priming and siRNA-mediated reduction resulted in increased expression of Il1b in LPS tolerance. Taken together, this screening approach confirmed the importance of epigenetic modifications in innate immune memory and provided potential novel targets for intervention.
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Affiliation(s)
- Salisa Benjaskulluecha
- Medical Microbiology, Interdisciplinary Program, Graduate School, Chulalongkorn University, Bangkok, 10330, Thailand
- Center of Excellence in Immunology and Immune-Mediated Diseases, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Atsadang Boonmee
- Center of Excellence in Immunology and Immune-Mediated Diseases, Chulalongkorn University, Bangkok, 10330, Thailand
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Thitiporn Pattarakankul
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
- Center of Excellence in Materials and Bio-Interfaces, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Benjawan Wongprom
- Center of Excellence in Immunology and Immune-Mediated Diseases, Chulalongkorn University, Bangkok, 10330, Thailand
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Jeerameth Klomsing
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Tanapat Palaga
- Medical Microbiology, Interdisciplinary Program, Graduate School, Chulalongkorn University, Bangkok, 10330, Thailand.
- Center of Excellence in Immunology and Immune-Mediated Diseases, Chulalongkorn University, Bangkok, 10330, Thailand.
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.
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Liu Y, Fu H, Wang T. Neuroinflammation in perioperative neurocognitive disorders: From bench to the bedside. CNS Neurosci Ther 2022; 28:484-496. [PMID: 34990087 PMCID: PMC8928922 DOI: 10.1111/cns.13794] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 12/12/2021] [Accepted: 12/13/2021] [Indexed: 12/17/2022] Open
Abstract
The perioperative neurocognitive disorders (PNDs) are one of the most common complications in elderly patients characterized by various forms of cognitive decline after anesthesia and surgery. Although the etiology for PNDs remained unclear, neuroinflammation has been characterized as one of the major causes, especially in the elderly patients. The activation of glial cells including microglia and astrocytes plays a significant role in the inflammatory responses in central nerve system (CNS). Although carefully designed, clinical studies on PNDs showed controversial results. Meanwhile, preclinical studies provided evidence from various levels, including behavior performance, protein levels, and gene expression. In this review, we summarize high‐quality studies and recent advances from both clinical and preclinical studies and provide a broad view from the onset of PNDs to its potential therapeutic targets. Future studies are needed to investigate the signaling pathways in PNDs for prevention and treatment, as well as the relationship of PNDs and future neurocognitive dysfunction.
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Affiliation(s)
- Yang Liu
- Department of Anesthesiology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Huiqun Fu
- Department of Anesthesiology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Tianlong Wang
- Department of Anesthesiology, Xuanwu Hospital, Capital Medical University, Beijing, China
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Wang Y, Mao J, Li X, Wang B, Zhou X. lncRNA HOTAIR mediates OGD/R-induced cell injury and angiogenesis in a EZH2-dependent manner. Exp Ther Med 2022; 23:99. [PMID: 34976141 PMCID: PMC8674968 DOI: 10.3892/etm.2021.11022] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 07/22/2021] [Indexed: 12/26/2022] Open
Abstract
Long non-coding RNAs (lncRNA) serve an important role in neonatal hypoxic-ischemic encephalopathy (HIE) have been reported to regulate the activity of HIE-associated proteins. The present study aimed to elucidate the role of Hox transcript antisense intergenic RNA (HOTAIR) in oxygen-glucose deprivation/reperfusion (OGD/R)-induced injury in human brain microvascular endothelial cells (hBMVECs). The levels of HOTAIR were evaluated in the serum of neonatal patients with HIE, and the effects of HOTAIR were evaluated using in vitro assays, such as reverse transcription-quantitative PCR to detect lncRNA and mRNA levels and western blot analysis to determine protein levels. Moreover, RNA immunoprecipitation assays were used to evaluate the association between HOTAIR and enhancer of zeste homolog 2 (EZH2), Cell Counting Kit-8 was used to detect cell viability, an endothelial monolayer cell permeability assay was used to analyze cell viability, TUNEL staining was used to detect the levels of apoptosis, a Transwell assay was used to evaluate cell invasion and a tube formation assay was used to analyze tube formation ability. In addition, the effects of HOTAIR and EZH2 on cell apoptosis and the invasive and tube formation abilities of hBMVECs were investigated using TUNEL, Transwell and tube formation assays, respectively. The results showed that the expression levels of HOTAIR were markedly increased both in neonatal HIE patients and in the OGD/R injury in vitro model. HOTAIR knockdown reduced hBMVEC viability, enhanced cell permeability and apoptosis, in addition to decreasing the expression levels of tight junction-related proteins, such as zonula occludens-1, occluden, Claudin5 and vascular endothelial-cadherin. However, EZH2 overexpression reversed the effects of HOTAIR silencing on hBMVECs. Additionally, HOTAIR knockdown enhanced the migratory and tube formation abilities of OGD/R-induced hBMVECs, which were also reversed by EZH2 overexpression. Overall, the present study revealed an association between the HOTAIR/EZH2 axis and brain microvascular endothelial cell injury and angiogenesis, which provides a novel insight into the molecular mechanism underlying stroke or the development of new pharmacotherapies.
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Affiliation(s)
- Yunpeng Wang
- Department of Neonatology, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, Guangdong 518052, P.R. China
| | - Jiaoyu Mao
- Department of Neonatology, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, Guangdong 518052, P.R. China
| | - Xiaodong Li
- Department of Neonatology, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, Guangdong 518052, P.R. China
| | - Beibei Wang
- Department of Neonatology, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
| | - Xiaoguang Zhou
- Department of Neonatology, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
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31
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Yan J, Xu W, Lenahan C, Huang L, Wen J, Li G, Hu X, Zheng W, Zhang JH, Tang J. CCR5 Activation Promotes NLRP1-Dependent Neuronal Pyroptosis via CCR5/PKA/CREB Pathway After Intracerebral Hemorrhage. Stroke 2021; 52:4021-4032. [PMID: 34719258 PMCID: PMC8607924 DOI: 10.1161/strokeaha.120.033285] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 07/11/2021] [Accepted: 07/30/2021] [Indexed: 02/05/2023]
Abstract
BACKGROUND AND PURPOSE Neuronal pyroptosis is a type of regulated cell death triggered by proinflammatory signals. CCR5 (C-C chemokine receptor 5)-mediated inflammation is involved in the pathology of various neurological diseases. This study investigated the impact of CCR5 activation on neuronal pyroptosis and the underlying mechanism involving cAMP-dependent PKA (protein kinase A)/CREB (cAMP response element binding)/NLRP1 (nucleotide-binding domain leucine-rich repeat pyrin domain containing 1) pathway after experimental intracerebral hemorrhage (ICH). METHODS A total of 194 adult male CD1 mice were used. ICH was induced by autologous whole blood injection. Maraviroc (MVC)-a selective antagonist of CCR5-was administered intranasally 1 hour after ICH. To elucidate the underlying mechanism, a specific CREB inhibitor, 666-15, was administered intracerebroventricularly before MVC administration in ICH mice. In a set of naive mice, rCCL5 (recombinant chemokine ligand 5) and selective PKA activator, 8-Bromo-cAMP, were administered intracerebroventricularly. Short- and long-term neurobehavioral assessments, Western blot, Fluoro-Jade C, terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL), and immunofluorescence staining were performed. RESULTS The brain expression of CCL5 (chemokine ligand 5), CCR5, PKA-Cα (protein kinase A-Cα), p-CREB (phospho-cAMP response element binding), and NLRP1 was increased, peaking at 24 hours after ICH. CCR5 was expressed on neurons, microglia, and astrocytes. MVC improved the short- and long-term neurobehavioral deficits and decreased neuronal pyroptosis in ipsilateral brain tissues at 24 hours after ICH, which were accompanied by increased PKA-Cα and p-CREB expression, and decreased expression of NLRP1, ASC (apoptosis-associated speck-like protein containing a CARD), C-caspase-1, GSDMD (gasdermin D), and IL (interleukin)-1β/IL-18. Such effects of MVC were abolished by 666-15. At 24 hours after injection in naive mice, rCCL5 induced neurological deficits, decreased PKA-Cα and p-CREB expression in the brain, and upregulated NLRP1, ASC, C-caspase-1, N-GSDMD, and IL-1β/IL-18 expression. Those effects of rCCL5 were reversed by 8-Bromo-cAMP. CONCLUSIONS CCR5 activation promoted neuronal pyroptosis and neurological deficits after ICH in mice, partially through the CCR5/PKA/CREB/NLRP1 signaling pathway. CCR5 inhibition with MVC may provide a promising therapeutic approach in managing patients with ICH.
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Affiliation(s)
- Jun Yan
- Department of Neurosurgery, Guangxi Medical University Cancer Hospital, Nanning, China (J.Y.)
| | - Weilin Xu
- Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China (W.X.)
| | - Cameron Lenahan
- Department of Biomedical Sciences, Burrell College of Osteopathic Medicine, Las Cruces, NM (C.L.)
| | - Lei Huang
- Department of Neurosurgery (L.H., J.H.Z.), Loma Linda University, CA
- Department of Physiology and Pharmacology (L.H., J.H.Z., J.T.), Loma Linda University, CA
| | - Jing Wen
- Department of Rheumatism, First Affiliated Hospital of Guangxi Medical University, Nanning, China (J.W.)
| | - Gaigai Li
- Department of Neurology, Tongji Hospital, Tongji Medical college, Huazhong University of Science and Technology, Wuhan, China (G.L.)
| | - Xin Hu
- Department of Neurosurgery, West China Hospital of Sichuan University, Chengdu, China (X.H.)
| | - Wen Zheng
- Department of Neurology, The Third Xiangya Hospital of Central South University, Changsha, China (W.Z.)
| | - John H. Zhang
- Department of Neurosurgery (L.H., J.H.Z.), Loma Linda University, CA
- Department of Physiology and Pharmacology (L.H., J.H.Z., J.T.), Loma Linda University, CA
- Department of Anesthesiology (J.H.Z.), Loma Linda University, CA
| | - Jiping Tang
- Department of Physiology and Pharmacology (L.H., J.H.Z., J.T.), Loma Linda University, CA
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Luteolin Confers Cerebroprotection after Subarachnoid Hemorrhage by Suppression of NLPR3 Inflammasome Activation through Nrf2-Dependent Pathway. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:5838101. [PMID: 34777689 PMCID: PMC8589510 DOI: 10.1155/2021/5838101] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Revised: 10/07/2021] [Accepted: 10/08/2021] [Indexed: 02/07/2023]
Abstract
Luteolin (LUT) possesses multiple biologic functions and has beneficial effects for cardiovascular and cerebral vascular diseases. Here, we investigated the protective effects of LUT against subarachnoid hemorrhage (SAH) and the involvement of underlying molecular mechanisms. In a rat model of SAH, LUT significantly inhibited SAH-induced neuroinflammation as evidenced by reduced microglia activation, decreased neutrophil infiltration, and suppressed proinflammatory cytokine release. In addition, LUT markedly ameliorated SAH-induced oxidative damage and restored the endogenous antioxidant systems. Concomitant with the suppressed oxidative stress and neuroinflammation, LUT significantly improved neurologic function and reduced neuronal cell death after SAH. Mechanistically, LUT treatment significantly enhanced the expression of nuclear factor-erythroid 2-related factor 2 (Nrf2), while it downregulated nod-like receptor pyrin domain-containing 3 (NLRP3) inflammasome activation. Inhibition of Nrf2 by ML385 dramatically abrogated LUT-induced Nrf2 activation and NLRP3 suppression and reversed the beneficial effects of LUT against SAH. In neurons and microglia coculture system, LUT also mitigated oxidative stress, inflammatory response, and neuronal degeneration. These beneficial effects were associated with activation of the Nrf2 and inhibitory effects on NLRP3 inflammasome and were reversed by ML385 treatment. Taken together, this present study reveals that LUT confers protection against SAH by inhibiting NLRP3 inflammasome signaling pathway, which may be modulated by Nrf2 activation.
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Qin B, Peng Y, Zhong C, Cai Y, Zhou S, Chen H, Zhuang J, Zeng H, Xu C, Xu H, Li J, Ying G, Gu C, Chen G, Wang L. Mast Cells Mediate Inflammatory Injury and Aggravate Neurological Impairment in Experimental Subarachnoid Hemorrhage Through Microglial PAR-2 Pathway. Front Cell Neurosci 2021; 15:710481. [PMID: 34646122 PMCID: PMC8503547 DOI: 10.3389/fncel.2021.710481] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Accepted: 08/19/2021] [Indexed: 11/30/2022] Open
Abstract
Subarachnoid hemorrhage (SAH) is a devastating cerebrovascular disease with high mortality and disability. Aberrant neuroinflammation has been identified as a critical factor accounting for the poor prognosis of SAH patients. Mast cells (MCs), the sentinel cells of the immune system, play a critical in the early immune reactions and participate in multiple pathophysiological process. However, the exact role of MCs on the pathophysiological process after SAH has not been fully understood. The current study was conducted to determine the role of MCs and MC stabilization in the context of SAH. Mouse SAH model was established by endovascular perforation process. Mice received saline or cromolyn (MC stabilizer) or compound 48/80 (MCs degranulator). Post-SAH evaluation included neurobehavioral test, western blot, immunofluorescence, and toluidine blue staining. We demonstrated that SAH induced MCs activation/degranulation. Administration of MC stabilizer cromolyn conferred a better neurologic outcome and decreased brain edema when compared with SAH+vehicle group. Furthermore, cromolyn significantly inhibited neuroinflammatory response and alleviated neuronal damage after SAH. However, pharmacological activation of MCs with compound 48/80 dramatically aggravated SAH-induced brain injury and exacerbated neurologic outcomes. Notably, pharmacological inhibition of microglial PAR-2 significantly reversed MCs-induced inflammatory response and neurological impairment. Additionally, the effect of MCs-derived tryptase in mediating neuroinflammation was also abolished by the microglial PAR-2 blockage in vitro. Taken together, MCs yielded inflammatory injury through activating microglia-related neuroinflammation after SAH. These data shed light on the notion that MCs might be a novel and promising therapeutic target for SAH.
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Affiliation(s)
- Bing Qin
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Yucong Peng
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Chen Zhong
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Yong Cai
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Shengjun Zhou
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Huaijun Chen
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Jianfeng Zhuang
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Hanhai Zeng
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Chaoran Xu
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Hangzhe Xu
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Jianru Li
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Guangyu Ying
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Chi Gu
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Gao Chen
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Lin Wang
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
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Fang Y, Shi H, Huang L, Ren R, Lenahan C, Xiao J, Liu Y, Liu R, Sanghavi R, Li C, Chen S, Tang J, Yu J, Zhang JH, Zhang J. Pituitary adenylate cyclase-activating polypeptide attenuates mitochondria-mediated oxidative stress and neuronal apoptosis after subarachnoid hemorrhage in rats. Free Radic Biol Med 2021; 174:236-248. [PMID: 34400297 PMCID: PMC8985554 DOI: 10.1016/j.freeradbiomed.2021.08.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 07/30/2021] [Accepted: 08/10/2021] [Indexed: 12/13/2022]
Abstract
Mitochondria-mediated oxidative stress and neuronal apoptosis play an important role in early brain injury following subarachnoid hemorrhage (SAH). Pituitary adenylate cyclase-activating polypeptide (PACAP) has been shown to reduce oxidative stress and cellular apoptosis by maintaining mitochondrial function under stress. The objective of this study is to investigate the effects of PACAP on mitochondria dysfunction - induced oxidative stress and neuronal apoptosis in both vivo and vitro models of SAH. PACAP Knockout CRISPR and exogenous PACAP38 were used to verify the neuroprotective effects of PACAP in rats after endovascular perforation - induced SAH as well as in primary neuron culture after hemoglobin stimulation. The results showed that endogenous PACAP knockout aggravated mitochondria dysfunction - mediated ATP reduction, reactive oxygen species accumulation and neuronal apoptosis in ipsilateral hemisphere at 24 h after SAH in rats. The exogenous PACAP38 treatment provided both short- and long-term neurological benefits by attenuating mitochondria - mediated oxidative stress and neuronal apoptosis after SAH in rats. Consistently, the exogenous PACAP38 treatment presented similar neuroprotection in the primary neuron culture after hemoglobin stimulation. Pharmacological inhibition of adenylyl cyclase (AC) or extracellular signal-regulated kinase (ERK) partly abolished the anti-oxidative stress and anti-apoptotic effects provided by PACAP38 treatment after the experimental SAH both in vivo and in vitro, suggesting the involvement of the AC-cyclic adenosine monophosphate (cAMP)-protein kinase A (PKA) and ERK pathway. Collectively, PACAP38 may serve as a promising treatment strategy for alleviating early brain injury after SAH.
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Affiliation(s)
- Yuanjian Fang
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Hui Shi
- Department of Neurosurgery, Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Lei Huang
- Department of Neurosurgery, Loma Linda University, Loma Linda, CA, USA; Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, USA
| | - Reng Ren
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Cameron Lenahan
- Department of Neurosurgery, Loma Linda University, Loma Linda, CA, USA; Burrell College of Osteopathic Medicine, Las Cruces, NM, USA
| | - Jie Xiao
- Department of Neurosurgery, Loma Linda University, Loma Linda, CA, USA
| | - Yu Liu
- Department of Neurosurgery, Loma Linda University, Loma Linda, CA, USA
| | - Rui Liu
- Department of Neurosurgery, Loma Linda University, Loma Linda, CA, USA
| | - Rajvee Sanghavi
- Burrell College of Osteopathic Medicine, Las Cruces, NM, USA
| | - Chenguang Li
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Sheng Chen
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Jiping Tang
- Department of Neurosurgery, Loma Linda University, Loma Linda, CA, USA; Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, USA; Department of Anesthesiology, Loma Linda University, Loma Linda, CA, USA
| | - Jun Yu
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China.
| | - John H Zhang
- Department of Neurosurgery, Loma Linda University, Loma Linda, CA, USA; Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, USA; Department of Anesthesiology, Loma Linda University, Loma Linda, CA, USA.
| | - Jianmin Zhang
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China.
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Wang Z, Li J, Wang A, Wang Z, Wang J, Yuan J, Wei X, Xing F, Zhang W, Xing N. Sevoflurane Inhibits Traumatic Brain Injury-Induced Neuron Apoptosis via EZH2-Downregulated KLF4/p38 Axis. Front Cell Dev Biol 2021; 9:658720. [PMID: 34422795 PMCID: PMC8371463 DOI: 10.3389/fcell.2021.658720] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 04/30/2021] [Indexed: 12/28/2022] Open
Abstract
Traumatic brain injury (TBI) is characterized by physical damage to the brain tissues, ensuing transitory or permanent neurological dysfunction featured with neuronal loss and subsequent brain damage. Sevoflurane, a widely used halogenated anesthetic in clinical settings, has been reported to alleviate neuron apoptosis in TBI. Nevertheless, the underlying mechanism behind this alleviation remains unknown, and thus was the focus of the current study. First, Feeney models were established to induce TBI in rats. Subsequently, evaluation of the modified neurological severity scores, measurement of brain water content, Nissl staining, and TUNEL assay were employed to investigate the neuroprotective effects of sevoflurane. Immunofluorescence and Western blot analysis were further applied to detect the expression patterns of apoptosis-related proteins as well as the activation of the p38-mitogen-activated protein kinase (MAPK) signaling pathway within the lesioned cortex. Additionally, a stretch injury model comprising cultured neurons was established, followed by neuron-specific enolase staining and Sholl analysis. Mechanistic analyses were performed using dual-luciferase reporter gene and chromatin immunoprecipitation assays. The results demonstrated sevoflurane treatment brought about a decrease blood-brain barrier (BBB) permeability, brain water content, brain injury and neuron apoptosis, to improve neurological function. The neuroprotective action of sevoflurane could be attenuated by inactivation of the p38-MAPK signaling pathway. Mechanistically, sevoflurane exerted an inhibitory effect on neuron apoptosis by up-regulating enhancer of zeste homolog 2 (EZH2), which targeted Krüppel-like factor 4 (KLF4) and inhibited KLF4 transcription. Collectively, our findings indicate that sevoflurane suppresses neuron apoptosis induced by TBI through activation of the p38-MAPK signaling pathway via the EZH2/KLF4 axis, providing a novel mechanistic explanation for neuroprotection of sevoflurane in TBI.
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Affiliation(s)
- Zhongyu Wang
- Department of Anesthesiology and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Juan Li
- Department of Anesthesiology and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Anqi Wang
- Department of Anesthesiology and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Zhaoyang Wang
- Department of Anesthesiology and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Junmin Wang
- Department of Human Anatomy, Basic Medical College of Zhengzhou University, Zhengzhou, China
| | - Jingjing Yuan
- Department of Anesthesiology and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xin Wei
- Department of Anesthesiology and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Fei Xing
- Department of Anesthesiology and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Wei Zhang
- Department of Anesthesiology and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Na Xing
- Department of Anesthesiology and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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Xiao J, Cai T, Fang Y, Liu R, Flores JJ, Wang W, Gao L, Liu Y, Lu Q, Tang L, Zhang JH, Lu H, Tang J. Activation of GPR40 attenuates neuroinflammation and improves neurological function via PAK4/CREB/KDM6B pathway in an experimental GMH rat model. J Neuroinflammation 2021; 18:160. [PMID: 34275493 PMCID: PMC8286626 DOI: 10.1186/s12974-021-02209-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 07/01/2021] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Germinal matrix hemorrhage (GMH) is defined by the rupture of immature blood vessels in the germinal matrix, where subsequent hemorrhage enters the subependymal zone and the cerebral lateral ventricles. The consequent blood clot has been identified as the causative factor of secondary brain injury, which triggers a series of complex parallel and sequential harmful mechanisms, including neuroinflammation. The orphan G-protein-coupled receptor 40 (GPR40), a free fatty acid (FFA) receptor 1, has been shown to exert anti-inflammatory effects when activated and improved outcomes in animal models of stroke. We aimed to investigate the anti-inflammatory effects of GPR40 and its underlying mechanisms after GMH. METHODS GMH model was induced in 7-day-old rat pups by an intraparenchymal injection of bacterial collagenase. GPR40 agonist, GW9508, was administered intranasally 1 h, 25 h, and 49 h after GMH induction. CRISPR targeting GPR40, PAK4, and KDM6B were administered through intracerebroventricular injection 48 h before GMH induction. Neurologic scores, microglia polarization, and brain morphology were evaluated by negative geotaxis, right reflex, rotarod test, foot fault test, Morris water maze, immunofluorescence staining, Western blots, and nissl staining respectfully. RESULTS The results demonstrated that GW9508 improved neurological and morphological outcomes after GMH in the short (24 h, 48 h, 72h) and long-term (days 21-27). However, the neuroprotective effects of treatment were abolished by GW1100, a selective GPR40 antagonist. GW9508 treatment increased populations of M2 microglia and decreased M1 microglia in periventricular areas 24 h after GMH induction. GW9508 upregulated the phosphorylation of PAK4, CREB, and protein level of KDM6B, CD206, IL-10, which was also met with the downregulation of inflammatory markers IL-1β and TNF-α. The mechanism study demonstrated that the knockdown of GPR40, PAK4, and KDM6B reversed the neuroprotective effects brought on by GW9508. This evidence suggests that GPR40/PAK4/CREB/KDM6B signaling pathway in microglia plays a role in the attenuation of neuroinflammation after GMH. CONCLUSIONS In conclusion, the present study demonstrates that the activation of GPR40 attenuated GMH-induced neuroinflammation through the activation of the PAK4/CREB/KDM6B signaling pathway, and M2 microglia may be a major mediator of this effect. Thus, GPR40 may serve as a potential target in the reduction of the inflammatory response following GMH, thereby improving neurological outcomes in the short- and long-term.
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Affiliation(s)
- Jie Xiao
- Department of Emergency, The Third Xiangya Hospital of Central South University, 138 Tongzipo Road, Changsha, Hunan, 410013, People's Republic of China
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, California, 92354, USA
| | - Tao Cai
- Department of Neurosurgery, The Third Xiangya Hospital of Central South University, 138 Tongzipo Road, Changsha, Hunan, 410013, People's Republic of China
| | - Yuanjian Fang
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, California, 92354, USA
| | - Rui Liu
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, California, 92354, USA
| | - Jerry J Flores
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, California, 92354, USA
| | - Wenna Wang
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, California, 92354, USA
| | - Ling Gao
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, California, 92354, USA
| | - Yu Liu
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, California, 92354, USA
| | - Qin Lu
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, California, 92354, USA
| | - Lihui Tang
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, California, 92354, USA
| | - John H Zhang
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, California, 92354, USA
- Departments of Anesthesiology, Neurosurgery and Neurology, Loma Linda University School of Medicine, Loma Linda, California, 92354, USA
| | - Hongwei Lu
- Center for Experimental Medicine, The Third Xiangya Hospital of Central South University, 138 Tongzipo Road, Changsha, Hunan, 410013, People's Republic of China.
| | - Jiping Tang
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, California, 92354, USA.
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37
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Weiland J, Beez A, Westermaier T, Kunze E, Sirén AL, Lilla N. Neuroprotective Strategies in Aneurysmal Subarachnoid Hemorrhage (aSAH). Int J Mol Sci 2021; 22:5442. [PMID: 34064048 PMCID: PMC8196706 DOI: 10.3390/ijms22115442] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/30/2021] [Accepted: 05/18/2021] [Indexed: 12/19/2022] Open
Abstract
Aneurysmal subarachnoid hemorrhage (aSAH) remains a disease with high mortality and morbidity. Since treating vasospasm has not inevitably led to an improvement in outcome, the actual emphasis is on finding neuroprotective therapies in the early phase following aSAH to prevent secondary brain injury in the later phase of disease. Within the early phase, neuroinflammation, thromboinflammation, disturbances in brain metabolism and early neuroprotective therapies directed against delayed cerebral ischemia (DCI) came into focus. Herein, the role of neuroinflammation, thromboinflammation and metabolism in aSAH is depicted. Potential neuroprotective strategies regarding neuroinflammation target microglia activation, metalloproteases, autophagy and the pathway via Toll-like receptor 4 (TLR4), high mobility group box 1 (HMGB1), NF-κB and finally the release of cytokines like TNFα or IL-1. Following the link to thromboinflammation, potential neuroprotective therapies try to target microthrombus formation, platelets and platelet receptors as well as clot clearance and immune cell infiltration. Potential neuroprotective strategies regarding metabolism try to re-balance the mismatch of energy need and supply following aSAH, for example, in restoring fuel to the TCA cycle or bypassing distinct energy pathways. Overall, this review addresses current neuroprotective strategies in aSAH, hopefully leading to future translational therapy options to prevent secondary brain injury.
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Affiliation(s)
- Judith Weiland
- Department of Neurosurgery, University Hospital Würzburg, Josef-Schneider Str. 11, 97080 Würzburg, Germany; (A.B.); (T.W.); (E.K.); (A.-L.S.)
| | - Alexandra Beez
- Department of Neurosurgery, University Hospital Würzburg, Josef-Schneider Str. 11, 97080 Würzburg, Germany; (A.B.); (T.W.); (E.K.); (A.-L.S.)
| | - Thomas Westermaier
- Department of Neurosurgery, University Hospital Würzburg, Josef-Schneider Str. 11, 97080 Würzburg, Germany; (A.B.); (T.W.); (E.K.); (A.-L.S.)
- Department of Neurosurgery, Helios-Amper Klinikum Dachau, Krankenhausstr. 15, 85221 Dachau, Germany
| | - Ekkehard Kunze
- Department of Neurosurgery, University Hospital Würzburg, Josef-Schneider Str. 11, 97080 Würzburg, Germany; (A.B.); (T.W.); (E.K.); (A.-L.S.)
| | - Anna-Leena Sirén
- Department of Neurosurgery, University Hospital Würzburg, Josef-Schneider Str. 11, 97080 Würzburg, Germany; (A.B.); (T.W.); (E.K.); (A.-L.S.)
| | - Nadine Lilla
- Department of Neurosurgery, University Hospital Würzburg, Josef-Schneider Str. 11, 97080 Würzburg, Germany; (A.B.); (T.W.); (E.K.); (A.-L.S.)
- Department of Neurosurgery, University Hospital Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany
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38
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Hanhai Z, Bin Q, Shengjun Z, Jingbo L, Yinghan G, Lingxin C, Shenglong C, Hang Z, Huaijun C, Jianfeng Z, Yucong P, Xiongjie F, Xiaobo Y, Xiaoxiao T, Jianru L, Chi G, Feng Y, Gao C. Neutrophil extracellular traps, released from neutrophil, promote microglia inflammation and contribute to poor outcome in subarachnoid hemorrhage. Aging (Albany NY) 2021; 13:13108-13123. [PMID: 33971624 PMCID: PMC8148446 DOI: 10.18632/aging.202993] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 04/05/2021] [Indexed: 02/07/2023]
Abstract
Evidence indicates that neutrophil has promoted inflammation in several central nervous system diseases. However, whether the peripheral blood levels of neutrophils are associated with the functional outcome after subarachnoid hemorrhage and its potential mechanism remain unclear. In this study, we showed that neutrophil levels in peripheral blood were higher in patients with subarachnoid hemorrhage (P < 0.001) than in healthy subjects. Neutrophil levels were positively associated with Hunt and Hess grade (P < 0.001) and modified Rankin Scale scores at 3 months after SAH (P = 0.008). In terms of the mechanism, neutrophil extracellular traps markedly increased the proinflammatory subtype transition of microglia. After treatment with DNAse I, the proinflammatory subtype transition of microglia involving CD16 positive and IL-1β positive microglia was limited (P < 0.05). This mechanism was also verified in vitro. These results indicate that the existence of neutrophil extracellular traps, released from neutrophils after subarachnoid hemorrhage, can shift microglia toward a more proinflammatory phenotype and contribute to neuroinflammation and poor outcome in subarachnoid hemorrhage.
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Affiliation(s)
- Zeng Hanhai
- Department of Neurological Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Qin Bin
- Department of Neurological Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhou Shengjun
- Department of Neurological Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Department of Neurological Surgery, Ningbo First Hospital, Ningbo, China
| | - Li Jingbo
- Department of Neurological Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Neurosurgerical Intensive Care Unit, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Guo Yinghan
- Department of Neurological Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Cai Lingxin
- Department of Neurological Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Cao Shenglong
- Department of Neurological Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhou Hang
- Department of Neurological Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Chen Huaijun
- Department of Neurological Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhuang Jianfeng
- Department of Neurological Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Peng Yucong
- Department of Neurological Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Fu Xiongjie
- Department of Neurological Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yu Xiaobo
- Department of Neurological Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Tan Xiaoxiao
- Department of Neurological Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Li Jianru
- Department of Neurological Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Gu Chi
- Department of Neurological Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yan Feng
- Department of Neurological Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Chen Gao
- Department of Neurological Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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Interleukin 6 and Aneurysmal Subarachnoid Hemorrhage. A Narrative Review. Int J Mol Sci 2021; 22:ijms22084133. [PMID: 33923626 PMCID: PMC8073154 DOI: 10.3390/ijms22084133] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 04/09/2021] [Accepted: 04/12/2021] [Indexed: 02/07/2023] Open
Abstract
Interleukin 6 (IL-6) is a prominent proinflammatory cytokine. Neuroinflammation in general, and IL-6 signaling in particular, appear to play a major role in the pathobiology and pathophysiology of aneurysm formation and aneurysmal subarachnoid hemorrhage (SAH). Most importantly, elevated IL-6 CSF (rather than serum) levels appear to correlate with delayed cerebral ischemia (DCI, “vasospasm”) and secondary (“vasospastic”) infarctions. IL-6 CSF levels may also reflect other forms of injury to the brain following SAH, i.e., early brain damage and septic complications of SAH and aneurysm treatment. This would explain why many researchers have found an association between IL-6 levels and patient outcomes. These findings clearly suggest CSF IL-6 as a candidate biomarker in SAH patients. However, at this point, discrepant findings in variable study settings, as well as timing and other issues, e.g., defining proper clinical endpoints (i.e., secondary clinical deterioration vs. angiographic vasospasm vs. secondary vasospastic infarct) do not allow for its routine use. It is also tempting to speculate about potential therapeutic measures targeting elevated IL-6 CSF levels and neuroinflammation in SAH patients. Corticosteroids and anti-platelet drugs are indeed used in many SAH cases (not necessarily with the intention to interfere with detrimental inflammatory signaling), however, no convincing benefit has been demonstrated yet. The lack of a robust clinical perspective against the background of a relatively large body of data linking IL-6 and neuroinflammation with the pathophysiology of SAH is somewhat disappointing. One underlying reason might be that most relevant studies only report correlative data. The specific molecular pathways behind elevated IL-6 levels in SAH patients and their various interactions still remain to be delineated. We are optimistic that future research in this field will result in a better understanding of the role of neuroinflammation in the pathophysiology of SAH, which in turn, will translate into the identification of suitable biomarkers and even potential therapeutic targets.
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Fledderus J, Vanchin B, Rots MG, Krenning G. The Endothelium as a Target for Anti-Atherogenic Therapy: A Focus on the Epigenetic Enzymes EZH2 and SIRT1. J Pers Med 2021; 11:jpm11020103. [PMID: 33562658 PMCID: PMC7915331 DOI: 10.3390/jpm11020103] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/02/2021] [Accepted: 02/03/2021] [Indexed: 12/11/2022] Open
Abstract
Endothelial cell inflammatory activation and dysfunction are key events in the pathophysiology of atherosclerosis, and are associated with an elevated risk of cardiovascular events. Yet, therapies specifically targeting the endothelium and atherosclerosis are lacking. Here, we review how endothelial behaviour affects atherogenesis and pose that the endothelium may be an efficacious cellular target for antiatherogenic therapies. We discuss the contribution of endothelial inflammatory activation and dysfunction to atherogenesis and postulate that the dysregulation of specific epigenetic enzymes, EZH2 and SIRT1, aggravate endothelial dysfunction in a pleiotropic fashion. Moreover, we propose that commercially available drugs are available to clinically explore this postulation.
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Affiliation(s)
- Jolien Fledderus
- Medical Biology Section, Laboratory for Cardiovascular Regenerative Medicine, Department Pathology and Medical Biology, University Medical Center Groningen, University of Groningen, Hanzeplein 1 (EA11), 9713 GZ Groningen, The Netherlands; (J.F.); (B.V.)
| | - Byambasuren Vanchin
- Medical Biology Section, Laboratory for Cardiovascular Regenerative Medicine, Department Pathology and Medical Biology, University Medical Center Groningen, University of Groningen, Hanzeplein 1 (EA11), 9713 GZ Groningen, The Netherlands; (J.F.); (B.V.)
- Department Cardiology, School of Medicine, Mongolian National University of Medical Sciences, Jamyan St 3, Ulaanbaatar 14210, Mongolia
| | - Marianne G. Rots
- Epigenetic Editing, Medical Biology Section, Department Pathology and Medical Biology, University Medical Center Groningen, University of Groningen, Hanzeplein 1 (EA11), 9713 GZ Groningen, The Netherlands;
| | - Guido Krenning
- Medical Biology Section, Laboratory for Cardiovascular Regenerative Medicine, Department Pathology and Medical Biology, University Medical Center Groningen, University of Groningen, Hanzeplein 1 (EA11), 9713 GZ Groningen, The Netherlands; (J.F.); (B.V.)
- Correspondence: ; Tel.: +31-50-361-8043; Fax: +31-50-361-9911
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Lucke-Wold B, Hosaka K, Dodd W, Motwani K, Laurent D, Martinez M, Hoh B. Interleukin-6: Important Mediator of Vasospasm Following Subarachnoid Hemorrhage. Curr Neurovasc Res 2021; 18:364-369. [PMID: 34736380 PMCID: PMC10127255 DOI: 10.2174/1567202618666211104122408] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 07/27/2021] [Accepted: 07/30/2021] [Indexed: 02/08/2023]
Abstract
The correlation of neuroinflammation with the development of cerebral vasospasm following subarachnoid hemorrhage has been well documented in the literature; both clinical and preclinical. The exact mechanisms by which this process occurs, however, are poorly elucidated. Recent evidence indicates that interleukin-6 is not only an important prognostic biomarker for subarachnoid hemorrhage and subsequent vasospasm development but also an integral component in the progression of injury following initial insult. In this review, we briefly highlight other pathways under investigation and focus heavily on what has been discovered regarding the role of interleukin 6 and cerebral vasospasm following subarachnoid hemorrhage. A proposed mechanistic pathway is highlighted in written and graphical format. A discussion regarding the human correlative findings and initial pre-clinical mechanistic studies is addressed. Finally, in the future investigation section, innovative developments and a clear description of areas warranting further scientific inquiry are emphasized. This review will catalyze continued discovery in this area of emerging significance and aid in the quest for effective vasospasm treatment where limited clinical therapeutics currently exist.
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Affiliation(s)
- Brandon Lucke-Wold
- Department of Neurosurgery, University of Florida, Gainesville, FL 32608, USA
| | - Koji Hosaka
- Department of Neurosurgery, University of Florida, Gainesville, FL 32608, USA
| | - William Dodd
- College of Medicine, University of Florida, Gainesville, FL 32608, USA
| | - Kartik Motwani
- College of Medicine, University of Florida, Gainesville, FL 32608, USA
| | - Dimitri Laurent
- Department of Neurosurgery, University of Florida, Gainesville, FL 32608, USA
| | - Melanie Martinez
- Department of Neurosurgery, University of Florida, Gainesville, FL 32608, USA
| | - Brian Hoh
- Department of Neurosurgery, University of Florida, Gainesville, FL 32608, USA
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42
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The Role of Oxidative Stress in Early Brain Injury after Subarachnoid Hemorrhage. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020. [DOI: 10.1155/2020/8877116] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This review focuses on the problem of oxidative stress in early brain injury (EBI) after spontaneous subarachnoid hemorrhage (SAH). EBI involves complex pathophysiological mechanisms, including oxidative stress. In the first section, we describe the main sources of free radicals in EBI. There are several sources of excessive generation of free radicals from mitochondrial free radicals’ generation and endoplasmic reticulum stress, to hemoglobin and enzymatic free radicals’ generation. The second part focuses on the disruption of antioxidant mechanisms in EBI. The third section describes some newly found molecular mechanisms and pathway involved in oxidative stress after EBI. The last section is dedicated to the pathophysiological mechanisms through which free radicals mediate early brain injury.
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