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Stem cells:低氧预处理+聚集成团可明显提高间充质干细胞移植后的骨骼修复潜能

2018-07-23 MedSci MedSci原创

基于细胞的骨骼肌组织损伤修复方法受细胞存活率差和移植的限制。对间充质干细胞(MSCs)进行短时间的低氧预处理可延长细胞在体内的存活时间,而将MSCs聚集成团可增加体内细胞存活率、营养因子分泌和组织形成。Steve S. Ho等人推测将MSCs聚集成团前予以低氧预处理可增加细胞的存活、增强其促血管生成能力以及促进骨骼修复。研究人员先将人类MSCs置于含氧量为1%的单层培养基中孵育3天(PC3),以环

基于细胞的骨骼肌组织损伤修复方法受细胞存活率差和移植的限制。对间充质干细胞(MSCs)进行短时间的低氧预处理可延长细胞在体内的存活时间,而将MSCs聚集成团可增加体内细胞存活率、营养因子分泌和组织形成。

Steve S. Ho等人推测将MSCs聚集成团前予以低氧预处理可增加细胞的存活、增强其促血管生成能力以及促进骨骼修复。研究人员先将人类MSCs置于含氧量为1%的单层培养基中孵育3天(PC3),以环境空气孵育(PC0)为对照,再将MSCs聚集成团来增加细胞密度,然后用海藻酸水凝胶包埋。

相比环境空气孵育的对照组,低氧预处理的MSC细胞团对凋亡的耐受性更强,而且这一反应与低氧暴露的持续时间相关。细胞团的密度越大,在体外表现出的成骨潜力也越大;此外,PC3细胞团分泌的血管内皮生长因子(VEGF)最多。

研究人员将PC3细胞团移植入股骨节段性缺损的大鼠体内,来评估其在骨骼愈合方面的潜能。与包埋未进行预处理的个体MSCs或包埋非细胞的凝胶相比,包埋预处理了的细胞团的凝胶可显着促进骨骼愈合。

综上所述,低氧预处理提供了一种简单的方法,可用于提高MSC细胞团用于骨骼愈合时的治疗潜能。

原始出处:

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createdBy=659819575782, createdName=124988c7m101暂无昵称, createdTime=Wed Jul 25 02:08:00 CST 2018, time=2018-07-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=333569, encodeId=646b333569c7, content=阅, beContent=null, objectType=article, channel=null, level=null, likeNumber=119, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://cdnapi.center.medsci.cn/medsci/head/2017/09/07/a9772c74ffd6edc03a7f9af07b4747f6.jpg, createdBy=b3722138742, createdName=sunfeifeiyang, createdTime=Mon Jul 23 11:26:18 CST 2018, time=2018-07-23, status=1, ipAttribution=)]
    2018-08-20 维他命
  5. 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createdBy=659819575782, createdName=124988c7m101暂无昵称, createdTime=Wed Jul 25 02:08:00 CST 2018, time=2018-07-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=333569, encodeId=646b333569c7, content=阅, beContent=null, objectType=article, channel=null, level=null, likeNumber=119, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://cdnapi.center.medsci.cn/medsci/head/2017/09/07/a9772c74ffd6edc03a7f9af07b4747f6.jpg, createdBy=b3722138742, createdName=sunfeifeiyang, createdTime=Mon Jul 23 11:26:18 CST 2018, time=2018-07-23, status=1, ipAttribution=)]
  6. [GetPortalCommentsPageByObjectIdResponse(id=1870767, encodeId=225518e0767c3, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=67, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Thu Feb 14 13:08:00 CST 2019, time=2019-02-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1716606, encodeId=874f1e16606dc, content=<a href='/topic/show?id=368310191010' target=_blank style='color:#2F92EE;'>#骨骼修复#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=65, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=101910, encryptionId=368310191010, topicName=骨骼修复)], attachment=null, authenticateStatus=null, createdAvatar=null, 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  7. 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    2018-07-23 sunfeifeiyang

    0

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具有不同组成的生物活性玻璃已广泛用于骨组织工程。本研究旨在制备、开发并表征可用于骨修复的含有生物玻璃的藻酸盐糊剂。 研究使用溶胶-凝胶制备的生物活性玻璃纳米颗粒,以及不同比例的CaO/P2O5(19,9.5和4.75),和不同浓度的海藻酸钠溶液(1,2和4wt%)制备了可注射骨浆。研究了CaO/P2O5和水粉比(P/L)以及藻酸盐浓度对糊剂的可注射性、生物降解性、流变性、生物活性和细胞行为的影响。

Biochem Biophys Res Commun:细胞外基质蛋白DMP1抑制骨髓间充质干细胞的成骨分化

间充质干细胞(MSCs)是一种自我更新和多能干细胞,可用于多种临床应用。但是,决定MSCs分化的复杂机制尚未完全明了。细胞外基质(ECM)蛋白质通过提供细胞外微环境来维持MSCs干细胞。越来越多的证据表明,ECM蛋白也可以直接调节MSCs的分化。牙本质基质蛋白1(DMP1)是富含骨组织和末端细胞的ECM蛋白,其在促进成骨细胞和骨细胞成熟以及促进矿化方面为人所知。最近,我们的实验表明DMP1也在长骨

Stem Cells Int:聚丁二酸丁二醇酯3D支架促进人类间充质干细胞生长和成骨作用

聚丁二酸丁二醇酯(PBS)是一种可生物降解的聚酯,与聚乳酸(PLA)相比,具有更好的可加工性和多种机械性能。目前仅有少数研究评估了含有PBS的骨TE材料,我们制备了PLA-PBS混合材料并分析了材料特性以及人骨髓间充质干细胞(hMSCs)在支架上的细胞附着、增殖和成骨分化。除PLA、PBS和PLA-PBS混合物外,还评价了PLA-聚己内酯和PLA-聚(三亚甲基碳酸酯)混合物。使用熔体纺丝制备聚合物

Haematologica:研究发现TGFβ1是引起骨髓增生异常综合征和急性髓系白血病间充质干细胞的功能性抑制触发因子

间充质基质细胞参与骨髓增生异常综合征和急性髓细胞白血病的发病机制,但其潜在机制尚不完全清楚。为了进一步表征病理学表型,我们对来自骨髓增生异常综合征和急性骨髓性白血病患者的间充质基质细胞进行了RNA测序,揭示了通常在骨髓增生异常综合征和急性骨髓性白血病中表达异常的基因的特定分子标记。通路分析显示,与骨生成、衰老、炎症和抑制性细胞因子有关的基因的强烈富集,从而在分子水平上反映骨髓增生异常综合征和急性髓

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