BACKGROUND Mesenchymal stem cells(MSCs)are considered a promising therapy for various diseases due to their strong potential in regenerative medicine and immunomodulation.The tissue source of MSCs has gained attention...BACKGROUND Mesenchymal stem cells(MSCs)are considered a promising therapy for various diseases due to their strong potential in regenerative medicine and immunomodulation.The tissue source of MSCs has gained attention for its role in influencing their function,accessibility,and readiness for clinical use.AIM To identify the most suitable adipose source for MSC isolation and expansion for further applications.METHODS We isolated MSCs from solid adipose tissue and liposuction aspirates using the enzyme method.The MSCs were examined for their expansion using population doubling time,differentiation capacity using multilineage differentiation induction,surface markers using flow cytometry,and stability of chromosomes using the karyotyping method.Growth factors and cytokines in MSC-conditioned media were analyzed using the Luminex assay.RESULTS MSCs were isolated from solid adipose tissue and lipoaspirates and expanded from passage 0 to passage 2.All adipose-derived MSCs(AD-MSCs)exhibited the typical elongated,spindle-shaped morphology and comparable proliferation rate.They expressed positive surface markers(cluster of differentiation 73[CD73]:>97%,CD90:>98%,and CD105:>95%),and negative markers(<1%).All MSCs expressed similar levels of stemness genes(octamer-binding transcription factor 4,SRY-box 2,Krüppel-like factor,and MYC),colonyforming,and trilineage differentiation potential.Karyotyping analysis revealed normal chromosomal patterns in all samples,except one sample exhibiting a polymorphism(1qh+).Furthermore,the growth factors and cytokines of hepatocyte growth factor,vascular endothelial growth factor A,interleukin 6(IL-6),and IL-8 were detected in all AD-MSC conditioned media;but fibroblast growth factor-2 and keratinocyte growth factor were selectively expressed in conditioned media from solid or lipoaspirate AD-MSCs,respectively.CONCLUSION These findings indicate that AD-MSCs from both adipose sources possess all of the characteristic features of MSCs with source-specific secretome differences,which are suitable for further expansion and various clinical applications.展开更多
目的通过动物和体外培养的软骨细胞观察糖基化终末产物(advanced glycation end products,AGEs)对软骨细胞线粒体功能的损伤作用,并探讨相关机制。方法小鼠膝关节腔直接注射AGEs,番红O-固绿染色评估病理学改变;JC-1检测线粒体膜电位ΔΨ...目的通过动物和体外培养的软骨细胞观察糖基化终末产物(advanced glycation end products,AGEs)对软骨细胞线粒体功能的损伤作用,并探讨相关机制。方法小鼠膝关节腔直接注射AGEs,番红O-固绿染色评估病理学改变;JC-1检测线粒体膜电位ΔΨm;Western blot检测腺苷酸活化蛋白激酶(adenosine monophosphate-activated protein kinase,AMPK)、过氧化物酶体增殖物激活受体γ辅助活化因子α(peroxisome proliferator-activated receptorγcoactivator-1α,PGC-1α)、去乙酰化酶3(sirtuin3,SIRT3)及基质金属蛋白酶(matrix metalloproteinase,MMP)-3、-13的表达。结果膝关节注射AGEs 8周后,小鼠出现骨关节炎样病理改变;在体外培养的软骨细胞中,AGEs可以损伤线粒体功能,同时p-AMPK、SIRT3和PGC-1α的表达减少;给予AMPK选择性激动剂AICAR则可以拮抗AGEs的上述作用,而特异性敲除SIRT3或PGC-1α后,AICAR此拮抗作用减弱。结论AGEs可能通过下调AMPK-PGC-1α-SIRT3信号通路诱导软骨细胞线粒体功能损伤,进而促进OA病变。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
文摘BACKGROUND Mesenchymal stem cells(MSCs)are considered a promising therapy for various diseases due to their strong potential in regenerative medicine and immunomodulation.The tissue source of MSCs has gained attention for its role in influencing their function,accessibility,and readiness for clinical use.AIM To identify the most suitable adipose source for MSC isolation and expansion for further applications.METHODS We isolated MSCs from solid adipose tissue and liposuction aspirates using the enzyme method.The MSCs were examined for their expansion using population doubling time,differentiation capacity using multilineage differentiation induction,surface markers using flow cytometry,and stability of chromosomes using the karyotyping method.Growth factors and cytokines in MSC-conditioned media were analyzed using the Luminex assay.RESULTS MSCs were isolated from solid adipose tissue and lipoaspirates and expanded from passage 0 to passage 2.All adipose-derived MSCs(AD-MSCs)exhibited the typical elongated,spindle-shaped morphology and comparable proliferation rate.They expressed positive surface markers(cluster of differentiation 73[CD73]:>97%,CD90:>98%,and CD105:>95%),and negative markers(<1%).All MSCs expressed similar levels of stemness genes(octamer-binding transcription factor 4,SRY-box 2,Krüppel-like factor,and MYC),colonyforming,and trilineage differentiation potential.Karyotyping analysis revealed normal chromosomal patterns in all samples,except one sample exhibiting a polymorphism(1qh+).Furthermore,the growth factors and cytokines of hepatocyte growth factor,vascular endothelial growth factor A,interleukin 6(IL-6),and IL-8 were detected in all AD-MSC conditioned media;but fibroblast growth factor-2 and keratinocyte growth factor were selectively expressed in conditioned media from solid or lipoaspirate AD-MSCs,respectively.CONCLUSION These findings indicate that AD-MSCs from both adipose sources possess all of the characteristic features of MSCs with source-specific secretome differences,which are suitable for further expansion and various clinical applications.
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。
