Role of mesenchymal stem cells in cell life and their signaling
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DAPI染⾊液说明书DAPI染⾊液产品简介:DAPI染⾊液(DAPI Staining Solution)是经过精⼼优化⼏乎适⽤于所有常见细胞和组织细胞核染⾊的染⾊液。
DAPI,即2-(4-Amidinophenyl)-6-indolecarbamidine dihydrochloride,也称DAPI dihydrochloride,分⼦式为C16H15N5 ·2HCl ,分⼦量为350.25 ,CAS Number 28718-90-3。
DAPI是⼀种可以穿透细胞膜的蓝⾊荧光染料。
和双链DNA结合后可以产⽣⽐DAPI⾃⾝强20多倍的荧光。
和EB(ethidium bromide)相⽐,对双链DNA的染⾊灵敏度要⾼很多倍。
DAPI染⾊常⽤于细胞凋亡检测,染⾊后⽤荧光显微镜观察或流式细胞仪检测。
DAPI也常⽤于普通的细胞核染⾊以及某些特定情况下的双链DNA染⾊。
DAPI的最⼤激发波长为340nm,最⼤发射波长为488nm;DAPI和双链DNA结合后,最⼤激发波长为364nm,最⼤发射波长为454nm。
本DAPI染⾊液可以直接⽤于固定细胞或组织的细胞核染⾊。
保存条件:-20℃避光保存,⼀年有效。
注意事项:本DAPI 染⾊液的浓度经过碧云天的优化,确保可以满⾜各种常规染⾊的需要。
如需使⽤特定浓度的DAPI,请选购碧云天的DAPI(C1002)。
荧光染料都存在淬灭的问题,建议染⾊后尽量当天完成检测。
为减缓荧光淬灭可以使⽤抗荧光淬灭封⽚液。
抗荧光淬灭封⽚液(P0126)可以向碧云天订购。
DAPI对⼈体有⼀定刺激性,请注意适当防护。
为了您的安全和健康,请穿实验服并戴⼀次性⼿套操作。
使⽤说明:1.对于细胞或组织样品,固定后,适当洗涤去除固定剂。
随后如果需要进⾏免疫荧光染⾊,则先进⾏免疫荧光染⾊,染⾊完毕后再按后续步骤进⾏DAPI染⾊。
如果不需要进⾏其它染⾊,则直接进⾏后续的DAPI染⾊。
2.对于贴壁细胞或组织切⽚,加⼊少量DAPI染⾊液,覆盖住样品即可。
外泌体治疗脊髓损伤的研究进展史冬玲;何冰倩;戴灵豪【摘要】Exosomes are membrane vesicles secreted by cells into the extracellular environment. Exosomes are a new cell component in the treatment of spinal cord injury. Exosomes are secreted by mesenchymal stem cells have anti-apoptotic, anti-inflammatory and pro-angiogenic effects in the treatment of spinal cord injury, which play a key role in nerve cell-cell communication and can delivery exogenous genetic material. Exosomes can penetrate blood-brain barrier and are more stable than their parent cells, reducing the safety risks in the administration of viable cells.%外泌体是细胞分泌到胞外环境的膜囊泡,是治疗脊髓损伤的一种新策略.间充质干细胞分泌的外泌体在脊髓损伤的治疗中具有抗凋亡、抗炎和促血管生成的作用,同时能促进神经细胞间的交流,并可作为外源性遗传物质的载体.与其亲代细胞相比,外泌体可穿越血脑屏障,更加稳定,降低了施用活细胞所固有的安全风险.【期刊名称】《基础医学与临床》【年(卷),期】2018(038)006【总页数】4页(P849-852)【关键词】脊髓损伤;外泌体;间充质干细胞【作者】史冬玲;何冰倩;戴灵豪【作者单位】浙江中医药大学中医药科学院,浙江杭州311400;浙江中医药大学中医药科学院,浙江杭州311400;浙江中医药大学中医药科学院,浙江杭州311400【正文语种】中文【中图分类】R341 脊髓损伤研究的现状脊髓损伤是脊柱损伤严重的并发症之一。
·综述·DOI:10.12449/JCH240333间充质干细胞及其外泌体在药物性肝损伤治疗中的作用邢国静1,2,罗龙龙1,王丽菲1,王顺娜1,郑晓凤3,卢利霞1,张久聪11 中国人民解放军联勤保障部队第九四〇医院消化内科,兰州 7300502 宁夏医科大学总医院消化内科,银川 7500013 兰州大学第二医院消化内科,兰州 730030通信作者:卢利霞,****************(ORCID:0009-0003-4791-9049);张久聪,********************(ORCID:0000-0003-4006-3033)摘要:药物性肝损伤(DILI)的发生率呈逐年上升趋势且损伤机制并不明确,针对DILI的治疗药物、肝脏支持系统及肝移植均有一定的局限性。
因此,寻找更安全有效的治疗方法已成为当下研究的热点。
间充质干细胞及其外泌体可通过减轻肝脏炎症反应,促进肝细胞增殖及再生、抗肝细胞凋亡,改善氧化应激和免疫调节等机制减轻肝损伤。
本文就间充质干细胞及其外泌体在药物性肝损伤治疗中的作用进行简要综述,以期为进一步研究提供参考。
关键词:间质干细胞;外泌体;药物性肝损伤基金项目:甘肃省卫生健康行业科研项目(GSWSKY2023-34);第九四〇医院研究生导师专项课题(2023YXKY020);第九四〇医院青年培育项目(2021yxky054);中央高校优秀青年团队培育项目(31920220065);甘肃省非感染性肝病临床医学研究中心(21JR7RA017)Role of mesenchymal stem cells and their exosomes in the treatment of drug-induced liver injuryXING Guojing1,2, LUO Longlong1, WANG Lifei1, WANG Shunna1, ZHENG Xiaofeng3, LU Lixia1, ZHANG Jiucong1.(1. Department of Gastroenterology,The 940th Hospital of Joint Logistic Support Force of PLA,Lanzhou 730050,China;2. Department of Gastroenterology,General Hospital of Ningxia Medical University,Yinchuan 750001,China;3. Department of Gastroenterology,The Second Hospital of Lanzhou University, Lanzhou 730030, China)Corresponding authors: LU Lixia,****************(ORCID: 0009-0003-4791-9049); ZHANG Jiucong,********************(ORCID: 0000-0003-4006-3033)Abstract:The incidence rate of drug-induced liver injury (DILI) is increasing year by year with unknown mechanisms, and the treatment methods for DILI mainly include drugs,liver support systems,and liver transplantation,all of which have certain limitations. Therefore, the search for safer and more effective treatment methods has become a research hotspot at present. Studies have shown that mesenchymal stem cells and their exosomes can alleviate liver injury by reducing liver inflammation, promoting hepatocyte proliferation and regeneration,inhibiting the apoptosis of hepatocytes,improving oxidative stress,and regulating immunity. This article briefly reviews the role of mesenchymal stem cells and their exosomes in the treatment of DILI,so as to provide a reference for further research.Key words:Mesenchymal Stem Cells; Exosomes; Drug Induced Liver InjuryResearch funding:Gansu Province Health Care Industry Research Program (GSWSKY2023-34);Special Projects for Graduate Student Supervisors of the 940th Hospital Youth (2023YXKY020); Youth Formation Program of the 940th Hospital (2021yxky054);Project of Excellent Youth Team Training for the Central Universities (31920220065); Gansu Provincial Clinical Medical Research Center for Non-Infectious Liver Diseases (21JR7RA017)药物性肝损伤(drug⁃induced liver injury,DILI)是指由化学药品、生物制品、中成药等按处方药或非处方药管理的药品,以及中药材、天然药物、保健品、膳食补充剂等产品,或其代谢产物乃至其辅料、污染物、杂质等所导致的肝损伤[1],是常见的药物不良反应,可在短期内造成肝衰竭,甚至死亡。
供体骨髓细胞在放射损伤肠道中的迁移定植和促修复作用研究刘登群;王锋超;王军平;史春梦;李蓉;冉新泽;粟永萍【摘要】Objective To explore the engraftment and characteristics of donor bone marrow cells(dBMCs) and their contribution to epithelial regeneration in radiation damaged intestine.Methods Sixty C57BL/6 mice aged 6-8 weeks were exposed to 10 Gy total body irradiation (TBI) and randomly divided into bone marrow transplantation (BMT) group and control group. Survival ratios in two groups were compared. Engraftment of dBMCs in bone marrow and intes-tine was demonstrated by green fluorescent protein(GFP) immunohistochemistry(IHC). Immunofluorescent costaining of GFP with CD45,Sca-1 and Ki67 was employed to study the phenotypes of engrafted dBMCs in intestine. Their contri-bution to intestinal regeneration was determined by HE staining and Brdu analysis.Results Survival ratio in BMT group was 95% on the 14th day. dBMCs migrated into bone marrow and intestine simultaneously. In the intestine, dBMCs firstly appeared at the bottom of lamina propria,then migrated upwards,and finally replaced all the intestinal mesenchy-mal cells. Hematopoietic stem cells (HSCs) appeared in intestine during the early periods. dBMCs alleviated lamina propria edema,promoted proliferation of intestinal stem cells(ISCs),and increased density of intestinal crypts. dBMCs could form epithelial cells in stable chimeric intestine,but not in the early stage.Conclusion dBMCs implant into in-testine in the early time after transplantation,and they promote the regeneration process of radiationdamaged intestine.%目的研究供体骨髓细胞(donor bone marrowcells,dBMCs)在全身放射损伤小鼠肠道内的迁移定植规律和对肠道放射损伤的促修复作用.方法将60只6~8周龄C57BL/6小鼠进行10 Gy全身照射后随机分为移植组和对照组.比较两组小鼠的存活率,免疫组化分析dBMCs在骨髓和肠道内的定植规律,免疫荧光双染鉴定早期植入肠道内的dBMCs表型.HE染色和Brdu免疫组化分析dBMCs对放射损伤肠道的促修复作用.结果实验后第14天,移植组小鼠的存活率为95%.dBMCs同时向受体骨髓和肠道迁移定植.移植早期dBMCs首先定植于肠道固有层底部并向上迁移,最终填充全部固有层.早期植入的骨髓细胞中含有Sca-1阳性造血干细胞.dBMCs可缓解放射所致肠黏膜固有层水肿,促进肠道干细胞增殖并增加肠隐窝密度.移植早期dBMCs不形成肠上皮细胞,稳定嵌合后可形成骨髓来源肠上皮细胞.结论 dBMCs在移植后早期即向肠道迁移定植并促进放射所致肠道损伤的修复重建过程.【期刊名称】《胃肠病学和肝病学杂志》【年(卷),期】2017(026)010【总页数】5页(P1154-1158)【关键词】放射损伤;肠道;骨髓移植;干细胞【作者】刘登群;王锋超;王军平;史春梦;李蓉;冉新泽;粟永萍【作者单位】第三军医大学军事预防医学院全军复合伤研究所,创伤、烧伤与复合伤国家重点实验室,重庆400038;第三军医大学军事预防医学院全军复合伤研究所,创伤、烧伤与复合伤国家重点实验室,重庆400038;第三军医大学军事预防医学院全军复合伤研究所,创伤、烧伤与复合伤国家重点实验室,重庆400038;第三军医大学军事预防医学院全军复合伤研究所,创伤、烧伤与复合伤国家重点实验室,重庆400038;第三军医大学军事预防医学院全军复合伤研究所,创伤、烧伤与复合伤国家重点实验室,重庆400038;第三军医大学军事预防医学院全军复合伤研究所,创伤、烧伤与复合伤国家重点实验室,重庆400038;第三军医大学军事预防医学院全军复合伤研究所,创伤、烧伤与复合伤国家重点实验室,重庆400038【正文语种】中文【中图分类】R574肠道上皮是机体吸收营养物质和隔离肠道致病菌的重要屏障,同时肠上皮是机体内更新最快的组织之一,肠上皮的快速更新有赖于肠道干细胞及其微环境细胞的共同作用[1-2]。