Peripheral nerve defect repair is a complex process that involves multiple cell types;perineurial cells play a pivotal role.Hair follicle neural crest stem cells promote perineurial cell proliferation and migration vi...Peripheral nerve defect repair is a complex process that involves multiple cell types;perineurial cells play a pivotal role.Hair follicle neural crest stem cells promote perineurial cell proliferation and migration via paracrine signaling;however,their clinical applications are limited by potential risks such as tumorigenesis and xenogeneic immune rejection,which are similar to the risks associated with other stem cell transplantations.The present study therefore focuses on small extracellular vesicles derived from hair follicle neural crest stem cells,which preserve the bioactive properties of the parent cells while avoiding the transplantation-associated risks.In vitro,small extracellular vesicles derived from hair follicle neural crest stem cells significantly enhanced the proliferation,migration,tube formation,and barrier function of perineurial cells,and subsequently upregulated the expression of tight junction proteins.Furthermore,in a rat model of sciatic nerve defects bridged with silicon tubes,treatment with small extracellular vesicles derived from hair follicle neural crest stem cells resulted in higher tight junction protein expression in perineurial cells,thus facilitating neural tissue regeneration.At 10 weeks post-surgery,rats treated with small extracellular vesicles derived from hair follicle neural crest stem cells exhibited improved nerve function recovery and reduced muscle atrophy.Transcriptomic and micro RNA analyses revealed that small extracellular vesicles derived from hair follicle neural crest stem cells deliver mi R-21-5p,which inhibits mothers against decapentaplegic homolog 7 expression,thereby activating the transforming growth factor-β/mothers against decapentaplegic homolog signaling pathway and upregulating hyaluronan synthase 2 expression,and further enhancing tight junction protein expression.Together,our findings indicate that small extracellular vesicles derived from hair follicle neural crest stem cells promote the proliferation,migration,and tight junction protein formation of perineurial cells.These results provide new insights into peripheral nerve regeneration from the perspective of perineurial cells,and present a novel approach for the clinical treatment of peripheral nerve defects.展开更多
背景:铜死亡作为一种新兴的细胞死亡方式,近年来受到广泛关注。然而,目前对于铜死亡的全球研究态势,尤其是在不同国家和学术群体中的研究重点与发展趋势尚缺乏系统性的认识。为了更全面地把握铜死亡领域的研究进展,亟需进行多数据库、...背景:铜死亡作为一种新兴的细胞死亡方式,近年来受到广泛关注。然而,目前对于铜死亡的全球研究态势,尤其是在不同国家和学术群体中的研究重点与发展趋势尚缺乏系统性的认识。为了更全面地把握铜死亡领域的研究进展,亟需进行多数据库、多角度的文献计量分析。目的:通过文献计量学方法系统分析铜死亡领域的研究现状、热点及发展趋势。方法:采用文献计量学方法,结合CiteSpace和VOSviewer可视化分析工具,分别对国际权威的Web of Science核心合集数据库与中国知网数据库(CNKI)中2022-2024年间的1378篇铜死亡相关文献进行分析,包括年发文量、科研合作网络、关键词共现聚类与热点变动特征以及高被引文献。通过对比分析这两个数据库的数据,旨在揭示全球视野下铜死亡研究的整体态势。结果与结论:铜死亡研究呈现快速增长趋势,中国发文量居首,以上海交通大学、中南大学等为核心机构。研究主题集中于铜死亡机制、肿瘤治疗应用(化学动力学疗法)及与铁死亡的交叉调控。关键词突现分析表明“免疫微环境”“肿瘤治疗”是研究热点。机器学习基因预测模型和单细胞测序技术正在推动精准医学发展。英文研究多集中于机制探索和技术应用,其研究方法、技术路线和热点方向对正处于快速发展期的国内铜死亡研究具有重要的借鉴意义。尤其是在肿瘤治疗等重大疾病领域开展跨学科合作和多中心临床转化研究,有望为包括中国人群在内的恶性肿瘤等重大疾病诊疗提供更具针对性和有效性的新策略。展开更多
基金supported by the National Natural Science Foundation of China,No.81571211(to FL)the Natural Science Foundation of Shanghai,No.22ZR1476800(to CH)。
文摘Peripheral nerve defect repair is a complex process that involves multiple cell types;perineurial cells play a pivotal role.Hair follicle neural crest stem cells promote perineurial cell proliferation and migration via paracrine signaling;however,their clinical applications are limited by potential risks such as tumorigenesis and xenogeneic immune rejection,which are similar to the risks associated with other stem cell transplantations.The present study therefore focuses on small extracellular vesicles derived from hair follicle neural crest stem cells,which preserve the bioactive properties of the parent cells while avoiding the transplantation-associated risks.In vitro,small extracellular vesicles derived from hair follicle neural crest stem cells significantly enhanced the proliferation,migration,tube formation,and barrier function of perineurial cells,and subsequently upregulated the expression of tight junction proteins.Furthermore,in a rat model of sciatic nerve defects bridged with silicon tubes,treatment with small extracellular vesicles derived from hair follicle neural crest stem cells resulted in higher tight junction protein expression in perineurial cells,thus facilitating neural tissue regeneration.At 10 weeks post-surgery,rats treated with small extracellular vesicles derived from hair follicle neural crest stem cells exhibited improved nerve function recovery and reduced muscle atrophy.Transcriptomic and micro RNA analyses revealed that small extracellular vesicles derived from hair follicle neural crest stem cells deliver mi R-21-5p,which inhibits mothers against decapentaplegic homolog 7 expression,thereby activating the transforming growth factor-β/mothers against decapentaplegic homolog signaling pathway and upregulating hyaluronan synthase 2 expression,and further enhancing tight junction protein expression.Together,our findings indicate that small extracellular vesicles derived from hair follicle neural crest stem cells promote the proliferation,migration,and tight junction protein formation of perineurial cells.These results provide new insights into peripheral nerve regeneration from the perspective of perineurial cells,and present a novel approach for the clinical treatment of peripheral nerve defects.
文摘背景:铜死亡作为一种新兴的细胞死亡方式,近年来受到广泛关注。然而,目前对于铜死亡的全球研究态势,尤其是在不同国家和学术群体中的研究重点与发展趋势尚缺乏系统性的认识。为了更全面地把握铜死亡领域的研究进展,亟需进行多数据库、多角度的文献计量分析。目的:通过文献计量学方法系统分析铜死亡领域的研究现状、热点及发展趋势。方法:采用文献计量学方法,结合CiteSpace和VOSviewer可视化分析工具,分别对国际权威的Web of Science核心合集数据库与中国知网数据库(CNKI)中2022-2024年间的1378篇铜死亡相关文献进行分析,包括年发文量、科研合作网络、关键词共现聚类与热点变动特征以及高被引文献。通过对比分析这两个数据库的数据,旨在揭示全球视野下铜死亡研究的整体态势。结果与结论:铜死亡研究呈现快速增长趋势,中国发文量居首,以上海交通大学、中南大学等为核心机构。研究主题集中于铜死亡机制、肿瘤治疗应用(化学动力学疗法)及与铁死亡的交叉调控。关键词突现分析表明“免疫微环境”“肿瘤治疗”是研究热点。机器学习基因预测模型和单细胞测序技术正在推动精准医学发展。英文研究多集中于机制探索和技术应用,其研究方法、技术路线和热点方向对正处于快速发展期的国内铜死亡研究具有重要的借鉴意义。尤其是在肿瘤治疗等重大疾病领域开展跨学科合作和多中心临床转化研究,有望为包括中国人群在内的恶性肿瘤等重大疾病诊疗提供更具针对性和有效性的新策略。
