Cellular & Molecular Biology Letters最新文献

{"title":"Exosome-derived proteins in gastric cancer progression, drug resistance, and immune response.","authors":"Jiayu Wang, Huan Zhang, Juntao Li, Xiangyu Ni, Wenying Yan, Yueqiu Chen, Tongguo Shi","doi":"10.1186/s11658-024-00676-5","DOIUrl":"https://doi.org/10.1186/s11658-024-00676-5","url":null,"abstract":"<p><p>Gastric cancer (GC) represents a prevalent malignancy globally, often diagnosed at advanced stages owing to subtle early symptoms, resulting in a poor prognosis. Exosomes are extracellular nano-sized vesicles and are secreted by various cells. Mounting evidence indicates that exosomes contain a wide range of molecules, such as DNA, RNA, lipids, and proteins, and play crucial roles in multiple cancers including GC. Recently, with the rapid development of mass spectrometry-based detection technology, researchers have paid increasing attention to exosomal cargo proteins. In this review, we discussed the origin of exosomes and the diagnostic and prognostic roles of exosomal proteins in GC. Moreover, we summarized the biological functions of exosomal proteins in GC processes, such as proliferation, metastasis, drug resistance, stemness, immune response, angiogenesis, and traditional Chinese medicine therapy. In summary, this review synthesizes current advancements in exosomal proteins associated with GC, offering insights that could pave the way for novel diagnostic and therapeutic strategies for GC in the foreseeable future.</p>","PeriodicalId":9688,"journal":{"name":"Cellular & Molecular Biology Letters","volume":"29 1","pages":"157"},"PeriodicalIF":9.2,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142884992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elongation factor 2 in cancer: a promising therapeutic target in protein translation.","authors":"Xuechao Jia, Chuntian Huang, Fangfang Liu, Zigang Dong, Kangdong Liu","doi":"10.1186/s11658-024-00674-7","DOIUrl":"https://doi.org/10.1186/s11658-024-00674-7","url":null,"abstract":"<p><p>Aberrant elongation of proteins can lead to the activation of oncogenic signaling pathways, resulting in the dysregulation of oncogenic signaling pathways. Eukaryotic elongation factor 2 (eEF2) is an essential regulator of protein synthesis that precisely elongates nascent peptides in the protein elongation process. Although studies have linked aberrant eEF2 expression to various cancers, research has primarily focused on its structure, highlighting a need for deeper exploration into its molecular functions. In this review, recent advancements in the structure, guanosine triphosphatase (GTPase) activity, posttranslational modifications, regulatory factors, and inhibitors of eEF2 are summarized. These findings provide a comprehensive cognition on the critical role of eEF2 and its potential as a therapeutic target in cancer. Furthermore, this review highlights important unanswered questions that warrant investigation in future research.</p>","PeriodicalId":9688,"journal":{"name":"Cellular & Molecular Biology Letters","volume":"29 1","pages":"156"},"PeriodicalIF":9.2,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142871461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inter- and intracellular mitochondrial communication: signaling hubs in aging and age-related diseases.","authors":"Meng Zhang, Jin Wei, Chang He, Liutao Sui, Chucheng Jiao, Xiaoyan Zhu, Xudong Pan","doi":"10.1186/s11658-024-00669-4","DOIUrl":"10.1186/s11658-024-00669-4","url":null,"abstract":"<p><p>Mitochondria are versatile and complex organelles that can continuously communicate and interact with the cellular milieu. Deregulated communication between mitochondria and host cells/organelles has significant consequences and is an underlying factor of many pathophysiological conditions, including the process of aging. During aging, mitochondria lose function, and mitocellular communication pathways break down; mitochondrial dysfunction interacts with mitochondrial dyscommunication, forming a vicious circle. Therefore, strategies to protect mitochondrial function and promote effective communication of mitochondria can increase healthy lifespan and longevity, which might be a new treatment paradigm for age-related disorders. In this review, we comprehensively discuss the signal transduction mechanisms of inter- and intracellular mitochondrial communication, as well as the interactions between mitochondrial communication and the hallmarks of aging. This review emphasizes the indispensable position of inter- and intracellular mitochondrial communication in the aging process of organisms, which is crucial as the cellular signaling hubs. In addition, we also specifically focus on the status of mitochondria-targeted interventions to provide potential therapeutic targets for age-related diseases.</p>","PeriodicalId":9688,"journal":{"name":"Cellular & Molecular Biology Letters","volume":"29 1","pages":"153"},"PeriodicalIF":9.2,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142853090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Maternal high-fat diet orchestrates offspring hepatic cholesterol metabolism via MEF2A hypermethylation-mediated CYP7A1 suppression.","authors":"Ling Zhang, Wenyu Zou, Shixuan Zhang, Honghua Wu, Ying Gao, Junqing Zhang, Jia Zheng","doi":"10.1186/s11658-024-00673-8","DOIUrl":"https://doi.org/10.1186/s11658-024-00673-8","url":null,"abstract":"<p><strong>Background: </strong>Maternal overnutrition, prevalent among women of childbearing age, significantly impacts offspring health throughout their lifetime. While DNA methylation of metabolic-related genes mediates the transmission of detrimental effects from maternal high-fat diet (HFD), its role in programming hepatic cholesterol metabolism in offspring, particularly during weaning, remains elusive.</p><p><strong>Methods: </strong>Female C57BL/6 J mice were administered a HFD or control diet, before and during, gestation and lactation. Hepatic cholesterol metabolism genes in the liver of offspring were evaluated in terms of their expression. The potential regulator of cholesterol metabolism in the offspring's liver was identified, and the function of the targeted transcription factor was evaluated through in vitro experiments. The methylation level of the target transcription factor was assessed using the MassARRAY EpiTYPER platform. To determine whether transcription factor expression is influenced by DNA methylation, in vitro experiments were performed using 5-azacitidine and Lucia luciferase activity assays.</p><p><strong>Results: </strong>Here, we demonstrate that maternal HFD results in higher body weight and hypercholesterolemia in the offspring as early as weaning age. Maternal HFD feeding exacerbates hepatic cholesterol accumulation in offspring primarily by inhibiting cholesterol elimination to bile acids, with a significant decrease of hepatic cholesterol 7α-hydroxylase (CYP7A1). RNA-seq analysis identified myocyte enhancer factor 2A (MEF2A) as a key transcription factor in the offspring liver, which was significantly downregulated in offspring of HFD-fed dams. MEF2A knockdown led to CYP7A1 downregulation and lipid accumulation in HepG2 cells, while MEF2A overexpression reversed this effect. Dual luciferase reporter assays confirmed direct modulation of CYP7A1 transcription by MEF2A. Furthermore, the reduced MEF2A expression was attributed to DNA hypermethylation in the Mef2a promoter region. This epigenetic modification manifested as early as the fetal stage.</p><p><strong>Conclusions: </strong>This study provides novel insights into how maternal HFD orchestrates hepatic cholesterol metabolism via MEF2A hypermethylation-mediated CYP7A1 suppression in offspring at weaning.</p>","PeriodicalId":9688,"journal":{"name":"Cellular & Molecular Biology Letters","volume":"29 1","pages":"154"},"PeriodicalIF":9.2,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142853113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Decoding the enigmatic estrogen paradox in pulmonary hypertension: delving into estrogen metabolites and metabolic enzymes.","authors":"Qiang You, Hequn Song, Ziming Zhu, Jinzheng Wang, Ruixin Wang, Mingjia Du, Yingjie Fu, Jinxiang Yuan, Rubin Tan","doi":"10.1186/s11658-024-00671-w","DOIUrl":"10.1186/s11658-024-00671-w","url":null,"abstract":"<p><p>Pulmonary hypertension (PH) presents a puzzling sex bias, being more prevalent in women yet often less severe than in men, and the underlying reasons remain unclear. Studies using animal models, and limited clinical data have revealed a protective influence of exogenous estrogens, known as the estrogen paradox. Research suggests that beyond its receptor-mediated effects, estrogen acts through metabolites such as 2-ME2, 4-OHE2, and 16-OHE2, which are capable of exhibiting protective or detrimental effects in PH, prompting the need to explore their roles in PH to untangle sex differences and the estrogen paradox. Hypoxia disrupts the balance of estrogen metabolites by affecting the enzymes responsible for estrogen metabolism. Delving into the role of these metabolic enzymes not only illuminates the sex difference in PH but also provides a potential rationale for the estrogen paradox. This review delves into the intricate interplay between estrogen metabolites, metabolic enzymes, and PH, offering a deeper understanding of sex-specific differences and the perplexing estrogen paradox in the context of this condition.</p>","PeriodicalId":9688,"journal":{"name":"Cellular & Molecular Biology Letters","volume":"29 1","pages":"155"},"PeriodicalIF":9.2,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142853086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic regulation of proximal tubular autophagy from injury to repair after ischemic kidney damage.","authors":"Yuhong Gong, Wei Zhu, Yongqiang Li, Tao Lu, Jiexing Tan, Changsheng He, Luodan Yang, Yufeng Zhu, Li Gong","doi":"10.1186/s11658-024-00663-w","DOIUrl":"10.1186/s11658-024-00663-w","url":null,"abstract":"<p><strong>Background: </strong>The role of proximal tubular autophagy in repairing kidney injury following ischemia remains unclear.</p><p><strong>Methods: </strong>In this study, we utilized mice with conditional deletion of the Atg5 gene in proximal tubules and monitored the long-term dynamic regulation of autophagy following ischemic acute kidney injury (AKI).</p><p><strong>Results: </strong>The results showed that Atg5-deficient proximal tubule epithelial cells exhibited damaged mitochondria, concentric membranes, and lysosomal accumulation 24 h after ischemia/reperfusion. However, 28 days after ischemia/reperfusion, concentric membrane bodies remained, but lysosomal accumulation was no longer observed. Notably, the absence of Atg5 in renal tubular epithelial cells impaired renal function and led to increased tubular cell proliferation and oxidative stress in the early stage of injury. However, during the repair period following AKI, Atg5 deficiency exhibited no significant difference in the expression of proliferating cell nuclear antigen (PCNA) and 4-hydoxynonenal (4HNE), suggesting that the improvement in renal fibrosis associated with Atg5 deficiency is unlikely to result from its effect on cell proliferation or reactive oxygen species levels. Additionally, Atg5 deficiency inhibits the secretion of profibrotic factor fibroblast growth factor 2 (FGF2) from the early stage of renal injury to the recovery stage of AKI, indicating that autophagy-specific regulation of FGF2 secretion is a dynamic process overlapping with other stages of injury. Furthermore, increased co-localization of ATG5 with 4HNE and FGF2 was observed in patient samples.</p><p><strong>Conclusion: </strong>In summary, our results suggest that the dynamic regulation of autophagy on key molecules involved in kidney injury and repair varies with the stage of kidney injury.</p>","PeriodicalId":9688,"journal":{"name":"Cellular & Molecular Biology Letters","volume":"29 1","pages":"151"},"PeriodicalIF":9.2,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11619129/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142784236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The miR-6240 target gene Igf2bp3 promotes myoblast fusion by enhancing myomaker mRNA stability.","authors":"Yuxin Huang, Wei Wang, Xinhao Fan, Xiaoqin Liu, Weiwei Liu, Zishuai Wang, Yixing Li, Yalan Yang, Zhonglin Tang","doi":"10.1186/s11658-024-00650-1","DOIUrl":"10.1186/s11658-024-00650-1","url":null,"abstract":"<p><strong>Background: </strong>Myoblast fusion plays a crucial role in myogenesis. Insulin-like growth factor 2 mRNA-binding protein 3 (IGF2BP3) functions as an RNA N⁶-methyladenosine reader and exerts important roles in various biological processes. While our prior study suggested Igf2bp3 contributes to myogenesis, its molecular regulatory mechanism is largely unclear.</p><p><strong>Methods: </strong>Real-time quantitative polymerase chain reaction (RT-qPCR) and western blot were used for gene expression analysis. siRNA and CRISPRi technologies were conducted to knockdown the expression of Igf2bp3. CRISPR/Cas9 technology was performed to knockout Igf2bp3. The Igf2bp3 overexpression vector was designed using the pcDNA3.1(+) vector. Immunofluorescence detection was employed for subcellular localization and cell differentiation analysis. Cell Counting Kit-8 (CCK-8) and 5-ethynyl-2'-deoxyuridine (EdU) assays were conducted for cell proliferation and fusion detection. The dual-luciferase reporter assay and RNA immunoprecipitation (RIP) assay were utilized for regulatory mechanism analysis of Igf2bp3.</p><p><strong>Results: </strong>The overexpression of Igf2bp3 enhances myoblast fusion while knockdown of Igf2bp3 blocks the formation of myotubes. miR-6240 promotes myoblast proliferation while preventing myoblast differentiation and fusion by targeting the 3' untranslated rgion (UTR) of Igf2bp3. Notably, the impacts of miR-6240 mimics on myoblast proliferation, differentiation, and fusion can be effectively counteracted by the overexpression of Igf2bp3. Moreover, our findings elucidate a direct interaction between Igf2bp3 and the myoblast fusion factor myomaker (Mymk). Igf2bp3 binds to Mymk to enhance its mRNA stability. This interaction results in increased expression of Mymk and heightened myoblast fusion.</p><p><strong>Conclusions: </strong>Our study unveils Igf2bp3 as a novel post-transcriptional regulator of myoblast fusion through the miR-6240/Mymk axis, significantly contributing to our understanding of skeletal muscle development.</p>","PeriodicalId":9688,"journal":{"name":"Cellular & Molecular Biology Letters","volume":"29 1","pages":"152"},"PeriodicalIF":9.2,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11622686/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142784237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exercise promotes skeletal muscle growth in adolescents via modulating Mettl3-mediated m6A methylation of MyoD in muscle satellite cells.","authors":"Shujing Feng, Hao Zhou, Xingzuan Lin, Siyuan Zhu, Huifang Chen, Han Zhou, Ru Wang, Peng Wang, Xiexiang Shao, Jianhua Wang","doi":"10.1186/s11658-024-00670-x","DOIUrl":"10.1186/s11658-024-00670-x","url":null,"abstract":"<p><strong>Background: </strong>Exercise exerts positive impacts on skeletal muscle health and homeostasis. Emerging evidence suggests that m6A methylation is involved in various physiological processes. However, the impact of exercise on adolescent skeletal muscle growth and the underlying epigenetic mechanisms remain poorly understood.</p><p><strong>Methods: </strong>The lower-limb skeletal muscles were harvested from exercise and control groups to compare the skeletal muscle growth in adolescents. mRNA sequencing was conducted to explore the mechanisms underlying enhanced skeletal muscle growth following exercise. The effects and mechanisms of Mettl3-mediated m6A methylation on adolescent skeletal muscle growth were investigated using muscle satellite cell (MuSC)-specific Mettl3 knockout (KO) mice. The potential function of MyoD for skeletal muscle growth in adolescents was explored by phenotypes after overexpression and evaluation of in vivo myogenesis. Additionally, the effects of the methyl donor betaine on adolescent skeletal muscle growth were investigated in vitro and in vivo.</p><p><strong>Results: </strong>Exercise could promote skeletal muscle growth in adolescents. Sequencing data analysis and confirmation assays uncovered that exercise significantly increased Mettl3-mediated m6A methylation and elevated the expression levels of activation marker MyoD in MuSCs. Establishment of MuSC-specific Mettl3 KO mice further demonstrated that Mettl3-mediated m6A methylation in MyoD contributed to skeletal muscle growth during adolescence. Mettl3-mediated m6A methylation regulated MyoD mRNA stability at the posttranscriptional level in MuSCs, with a functional site at 234 bp A. Increased expression of MyoD could contribute to myogenesis of adolescent MuSCs. Furthermore, the methyl donor betaine could enhance MyoD expression, contributing to MuSCs activation and skeletal muscle growth in adolescents by boosting m6A methylation levels.</p><p><strong>Conclusions: </strong>Exercise promoted skeletal muscle growth in adolescents through facilitating MyoD mRNA stability of MuSCs in a Mettl3-mediated m6A-dependent manner. The methyl donor betaine could be a potential alternative to exercise for promoting adolescent skeletal muscle growth by directly augmenting the global levels of m6A methylation. These findings may provide a theoretical foundation for encouraging daily fitness exercise and ensuring healthy growth in adolescents.</p>","PeriodicalId":9688,"journal":{"name":"Cellular & Molecular Biology Letters","volume":"29 1","pages":"150"},"PeriodicalIF":9.2,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11616192/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142779497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Single-cell view and a novel protective macrophage subset in perivascular adipose tissue in T2DM.","authors":"Jiaxuan Li, Zhenyu Tian, Tongxue Zhang, Jiajia Jin, Xinjie Zhang, Panpan Xie, Haiyan Lin, Junfei Gu, Yingjie Wu, Xiaowei Wang, Shucui Zhang, Xuefang Yan, Dong Guo, Zhe Wang, Qunye Zhang","doi":"10.1186/s11658-024-00668-5","DOIUrl":"10.1186/s11658-024-00668-5","url":null,"abstract":"<p><strong>Background: </strong>Vasculopathy underlies diabetic complications, with perivascular adipose tissue (PVAT) playing crucial roles in its development. However, the changes in the cellular composition and function of PVAT, including the specific cell subsets and mechanisms implicated in type 2 diabetes mellitus (T2DM) vasculopathy, remain unclear.</p><p><strong>Methods: </strong>To address the above issues, we performed single-cell RNA sequencing on the stromal vascular fraction (SVF) of PVAT from normal and T2DM rats. Then, various bioinformatics tools and functional experiments were used to investigate the characteristic changes in the cellular profile of diabetic PVAT SVF, their implications, and the underlying mechanisms.</p><p><strong>Results: </strong>Our study reveals the single-cell landscape of the SVF of PVAT, demonstrating its considerable heterogeneity and significant alterations in T2DM, including an enhanced inflammatory response and elevated proportions of macrophages and natural killer (NK) cells. Moreover, macrophages are critical hubs for cross-talk among various cell populations. Notably, we identified a decreased Pdpn⁺ macrophage subpopulation in the PVAT of T2DM rats and confirmed this in mice and humans. In vitro and in vivo studies demonstrated that Pdpn⁺ macrophages alleviated insulin resistance and modulated adipokine/cytokine expression in adipocytes via the Pla2g2d-DHA/EPA-GPR120 pathway. This subset also enhances the function of vascular endothelial and smooth muscle cells, inhibits vascular inflammation and oxidative stress, and improves vasodilatory function, thereby protecting blood vessels.</p><p><strong>Conclusion: </strong>Pdpn⁺ macrophages exhibit significant vascular protective effects by alleviating insulin resistance and modulating adipokine/cytokine expression in PVAT adipocytes. This macrophage subtype may therefore play pivotal roles in mitigating vascular complications in T2DM. Our findings also underscore the critical role of immune-metabolic cross-talk in maintaining tissue homeostasis.</p>","PeriodicalId":9688,"journal":{"name":"Cellular & Molecular Biology Letters","volume":"29 1","pages":"148"},"PeriodicalIF":9.2,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11616190/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142766507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Acid-sensing ion channel-1 contributes to the failure of myelin sheath regeneration following spinal cord injury by transcellular delivery of PGE2.","authors":"Zuomeng Wu, Tianyu Han, Yixiang Dong, Wang Ying, Huang Fang, Yunlei Liu, Peiwen Song, Cailiang Shen","doi":"10.1186/s11658-024-00672-9","DOIUrl":"10.1186/s11658-024-00672-9","url":null,"abstract":"<p><strong>Background: </strong>Traumatic injuries to spinal cord lead to severe motor, sensory, and autonomic dysfunction. The accumulation of inhibitory compounds plays a pivotal role in the secondary damage to sparing neural tissue and the failure of axonal regeneration and remyelination. Acid-sensing ion channel-1(ASIC1A) is widely activated following neurotrauma, including spinal cord injury (SCI). However, its role in SCI remains elusive.</p><p><strong>Methods: </strong>The effects of acidic environment on the differentiation and genes changes of neural stem cells (NSCs) were assessed by immunofluorescence staining and RNA-sequencing analysis, respectively. The expression of ASIC1A and prostaglandin endoperoxide synthase 2 (PTGS2) were detected by western blot and immunofluorescence staining. The concentration of prostaglandin E2 (PGE2) within NSC-derived extracellular vesicles were evaluated by ELISA. Small-interfering RNAs (siRNAs) were used to knock down Asic1a and Ptgs2 expression in NSCs. The myelin sheath regeneration and axonal remyelination in rats and Asic1a-KO mice were assessed by immunofluorescence staining.</p><p><strong>Results: </strong>Following injury to the spinal cord, ASIC1A was found to be colocalized and upregulated in NSCs. ASIC1A activation prevents the differentiation of NSCs into oligodendrocytes by upregulating PTGS2, which leads to increased production and release of PGE2 within extracellular vesicles (EVs). ASIC1A or PTGS2 deficiency in NSCs counters the ASIC1A-related effects on mediating NSC differentiation by reducing PGE2 expression within NSC-derived EVs. Furthermore, intervention in ASIC1A signaling by administration of ASIC1A inhibitors or genetic deletion of ASIC1A demonstrated a pronounced advantage in enhancing myelin sheath regeneration and axonal remyelination.</p><p><strong>Conclusions: </strong>The activation of ASIC1A prevents NSC differentiation into oligodendrocytes via the transcellular NSC-to-NSC delivery of PGE2, resulting in the failure of myelin sheath regeneration and axonal remyelination following SCI. The inhibition of ASIC1A presents a promising therapeutic strategy for the treatment of SCI.</p>","PeriodicalId":9688,"journal":{"name":"Cellular & Molecular Biology Letters","volume":"29 1","pages":"149"},"PeriodicalIF":9.2,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11616324/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142766589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}