共查询到19条相似文献,搜索用时 62 毫秒
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该文旨在比较人滑膜间充质干细胞(human synovial mesenchymal stem cells,hSMSCs)与人脐带间充质干细胞(human umbilical cord mesenchymal stem cells,hUC-MSCs)的生物学性状.流式细胞仪鉴定hSMSCs和hUC-MSCs.比较两种间... 相似文献
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人脐带间充质干细胞研究进展及应用前景 总被引:1,自引:0,他引:1
人脐带问充质干细胞(hUCMSC)是来源于发育早期中胚层和外胚层、存在于脐带沃顿胶和血管周围组织中的一类具有自我更新、增殖和多向分化潜能的干细胞。当前主要通过分离、扩增传代培养,然后超低温保存的方法提取保存hUCMSC。与其他来源的干细胞相比,hUCMSC具有来源广泛、可塑性强、对供者无不利影响、无伦理争论限制等优势,并且具有很强的向多组织分化的潜能,因此hUCMSC成为在组织工程、造血干细胞移植及基因治疗等研究领域具有巨大潜力的种子细胞,在临床应用方面有十分广阔的前景。 相似文献
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间充质干细胞(mesenchymal stem cell,MSC),是来源于中胚层的具有自我更新能力和多向分化潜能干细胞,在体内外可以分化成骨、软骨、脂肪、肌腱和肌细胞等.由于其强大的分化潜能,MSC在组织工程与再生医学方面具有广泛的应用前景.MSC存在于高度受调控的被称为"壁龛"的微环境中.干细胞壁龛处于一个缺氧的环境中,氧分压可以低至7.2 mmHg.同时MSC是肿瘤微环境的重要的细胞组成成分,肿瘤微环境也是存在于一个缺氧的环境中.了解MSC在缺氧状态下的分化能力,对于组织工程、再生医学和肿瘤的发生发展研究具有重要的意义.缺氧相关的信号转导参与MSC定向分化能力的过程.目前MSC在缺氧状态下的成脂和成骨分化的研究存在着差异,这些研究结果的差异可能是由于MSC的异质性以及实验操作不同所引起. 相似文献
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间充质干细胞(MSCs)是一种具有自我更新和多向分化潜能的成体干细胞,存在于骨髓、脂肪组织、脐血及多种胎儿组织.它可分泌多种细胞因子及生长因子,促进造血干细胞(HSC)的增殖与分化.MSCs还具有免疫调节、抗炎和组织修复作用,可减轻移植物抗宿主病(GVHD)及其他移植相关并发症. 相似文献
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脂肪组织几乎遍布于动物体全身,在整个生命过程中有极强的可塑性. 近年研究表明,运用相似的分离方法,可从人、小鼠、大鼠、兔和猪等物种脂肪组织中分离获得脂肪间充质干细胞. 与骨髓来源的间充质干细胞相比,它具有相似的表面标记和分化潜能;在合适的诱导条件下,这种细胞能分别向3个胚层的细胞分化,如成肌细胞、心肌细胞、软骨细胞、成骨细胞、脂肪细胞、神经细胞、血管内皮细胞和肝细胞等;脂肪间充质干细胞具有来源丰富,取材安全方便和扩增速率高的特点,使其在细胞治疗和组织工程方面具有更广阔的应用前景. 相似文献
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自然存在的间充质干细胞数量少,限制了其研究应用。依靠自主发明的间充质干细胞过滤分离器,分离制备了人羊膜间充质干细胞,并对制备的干细胞进行了三维培养扩增。结果表明,制备的干细胞形态长势良好,并能诱导分化为类胰岛样组织。与常规方法相比,干细胞收获率提高了8倍以上,且细胞活性状态良好。间充质干细胞过滤分离器可以批量制备高质量的各种间充质干细胞,有利于高效率地建设各种间充质干细胞库,以促进间充质干细胞的研究应用。 相似文献
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炎症性肠病(IBD)是一种慢性非特异性肠道炎性疾病,其病因未明,有终生复发倾向,重症者迁延不愈。早期治疗以药物为主,部分重症患者后期需要手术干预。近年来,间充质干细胞(MSCs)由于具有多向分化潜能、免疫调节及组织修复功能已被广泛应用于IBD治疗的临床前基础研究中,具有一定理论基础。在已开展的MSCs治疗IBD的临床试验中,尚未有严重并发症的报道。虽然目前MSCs治疗不是IBD的标准治疗方案,但今后可能会成为一种新的治疗选择,特别是对于难治性或合并肛瘘的IBD患者。本文就MSCs的概况及其在IBD治疗的作用机制和应用前景作一综述。 相似文献
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Mesenchymal stem cells (MSCs) are a heterogeneous population of stem/progenitor cells with pluripotent capacity to differentiate into mesodermal and non‐mesodermal cell lineages, including osteocytes, adipocytes, chondrocytes, myocytes, cardiomyocytes, fibroblasts, myofibroblasts, epithelial cells, and neurons. MSCs reside primarily in the bone marrow, but also exist in other sites such as adipose tissue, peripheral blood, cord blood, liver, and fetal tissues. When stimulated by specific signals, these cells can be released from their niche in the bone marrow into circulation and recruited to the target tissues where they undergo in situ differentiation and contribute to tissue regeneration and homeostasis. Several characteristics of MSCs, such as the potential to differentiate into multiple lineages and the ability to be expanded ex vivo while retaining their original lineage differentiation commitment, make these cells very interesting targets for potential therapeutic use in regenerative medicine and tissue engineering. The feasibility for transplantation of primary or engineered MSCs as cell‐based therapy has been demonstrated. In this review, we summarize the current knowledge on the signals that control trafficking and differentiation of MSCs. J. Cell. Biochem. 106: 984–991, 2009. © 2009 Wiley‐Liss, Inc. 相似文献
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目的:探讨间充质干细胞(MSC)共培养对体外诱导脐带血单个核细胞来源的造血干/祖细胞生成巨核细胞的影响。方法:分离得到骨髓和脐带2种来源的MSC,并对它们进行表面标志和多向分化能力的鉴定,同时通过实时定量PCR及对RT-PCR产物的电泳分析,对比相同培养代数下2种MSC表达造血因子的情况;用梯度离心法分离得到单个核细胞,通过直接接触或Trans-well分隔的方式分别与MSC共培养,观察细胞增殖情况,并检测巨核系特异性的表面标志和相关基因的表达。结果:骨髓和脐带来源的MSC均分泌对巨核细胞增殖分化有促进作用的造血因子,与造血干/祖细胞直接共培养,对于巨核细胞的增殖有明显的促进作用,分化效果不明显;在非接触共培养的条件下,对巨核细胞的增殖及分化都产生促进作用,且骨髓来源的MSC较脐带来源的MSC效果更加明显。结论:MSC与脐带血造血干/祖细胞非接触培养,对其向巨核分化和增殖的促进作用明显,本实验所用的骨髓来源MSC促分化效果更好。本研究为今后进一步优化巨核系诱导分化体系奠定了基础,并对未来体外大规模制备巨核系祖细胞应用于临床治疗有一定的指导作用。 相似文献
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Xiaochun Sun Hua Cai Hui Qian Wei Zhu Yongmin Yan Huaxi Xu Wenrong Xu 《Cell biology international》2011,35(2):119-123
In the present study, MSCs (mesenchymal stem cells) were successfully isolated and identified from hUCC (human uterine cervix cancer) tissues. The morphological appearance, immunophenotype, growth curve, cell cycle, cytogenetic features and differentiation potential of these cells were investigated. Results showed that cells isolated from the uterine cervix cancer tissues displayed fibroblast‐like morphology and grew into colonies. Immunophenotyping by flow cytometry revealed that the isolated cells were positive for CD13, CD29, CD44, CD105 and HLA‐I, while negative for CD10, CD14, CD31, CD34, CD38 and HLA‐DR. The cells kept a normal karyotype by chromosome analysis. At the third passage, the percentages of cells in G0‐/G1‐, 2‐/M‐ and S‐phase were 84.94, 8.36 and 6.71%, respectively. Under appropriate induction conditions, these cells can differentiate into osteogenic, adipogenic cells and hepatocytes. Taken together, MSCs were confirmed to exist in hUCC tissues, which may provide a new target for clinical cancer therapy. 相似文献
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目的:观察低氧对间充质干细胞(MSC)成骨相关基因表达的影响。方法:取第2代MSC,分别在常氧和3%氧浓度下培养,采用real-timeRT-PCR检测骨桥蛋白(OPN)、核心结合因子α1(Cbfal)、骨形态发生蛋白(BMP)和血管内皮生长因子(VEGF)mRNA的表达。结果:2种氧浓度下MSC的形态无明显差异,但3%氧浓度下MSC集落形成能力增强。常氧下MSC中Cbfal和BMPmRNA的表达高于3%氧浓度,差异有显著性(P〈0.05);而OPN和VEGFmRNA的表达虽高于3%氧浓度,但差异无显著性(P〉0.05)。结论:3%氧浓度对MSC的形态没有明显影响,但增强其增殖能力,抑制其成骨分化能力。 相似文献
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影响骨髓间质干细胞向成骨细胞分化的调控因素 总被引:3,自引:0,他引:3
长期的骨骼废用引起的骨质减少主要归因于骨形成的减少,成骨细胞由具有多向分化潜能的间充质细胞经骨原细胞、前成骨细胞分化而来,骨髓间质干细胞是骨髓来源的具有多向分化潜能的干细胞,本文综述了骨髓间质干细胞向成骨细胞分化的调控因素,有助于增加对骨丢失的理解,并进行预防和治疗,为航天员和骨骼废用病人创造更健康的生活。 相似文献
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Xin‐Rong Tao Wen‐Lin Li Juan Su Cai‐Xia Jin Xin‐Min Wang Jian‐Xiu Li Jun‐Kai Hu Zhen‐Hua Xiang Joseph T.Y. Lau Yi‐Ping Hu 《Journal of cellular biochemistry》2009,108(3):693-704
There is increasing evidence that human mesenchymal stem cells (hMSCs) can be a valuable, transplantable source of hepatocytes. Most of the hMSCs preparations used in these studies were likely heterogeneous cell populations, isolated by adherence to plastic surfaces or by density gradient centrifugation. Therefore, the participation of other unknown trace cell populations cannot be rigorously discounted. Here we report the isolation and establishment of a cloned human MSC line (chMSC) from human bone marrow primary culture, through which we confirmed the hepatic differentiation capability of authentic hMSCs. chMSCs expressed markers of mesenchymal cells, but not markers of hematopoietic stem cells. In vitro, chMSCs can differentiate into either mesenchymal cells or cells exhibiting hepatocyte‐like phenotypes. When transplanted intrasplentically into carbon tetrachloride‐injured livers of SCID mice, EGFP‐tagged chMSCs engrafted into the host liver parenchyma, exhibited typical hepatocyte morphology, form a three‐dimensional architecture, and differentiate into hepatocyte‐like cells expressing human albumin and α‐1‐anti‐trypsin. By confocal microscopy, ultrafine intercellular nanotubular structures were visible between adjacent transplanted and host hepatocytes. We postulate that these structures may assist in the phenotype conversion of chMSCs, possibly by exchange of cytoplasmic components between native hepatocytes and transplanted cells. Thus, a clonal pure population of hMSCs, which can be expanded in culture, may have potential as a cellular source for substitution damaged cells in hepatic injury. J. Cell. Biochem. 108: 693–704, 2009. © 2009 Wiley‐Liss, Inc. 相似文献
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