J Periodontol:牙周膜间充质干细胞自噬的激活促进牙周炎的血管生成

2018-04-05 MedSci MedSci原创

牙齿支持组织中血管生成的改变在牙周炎的发生发展中起重要作用。间充质干细胞(MSCs)可以通过旁分泌功能影响内皮细胞(ECs)的血管形成。据报道,自噬与细胞分泌密切相关。在这里,我们研究了炎症条件下存在于牙周韧带(称为牙周膜干细胞,PDLSC)中的MSCs的血管生成促进能力,以探索牙周炎中血管生成改变的机制。 从健康和牙周炎患者的牙周韧带组织(分别为HPDLSCs和PPDLSCs)分离PDLS

牙齿支持组织中血管生成的改变在牙周炎的发生发展中起重要作用。间充质干细胞(MSCs)可以通过旁分泌功能影响内皮细胞(ECs)的血管形成。据报道,自噬与细胞分泌密切相关。在这里,我们研究了炎症条件下存在于牙周韧带(称为牙周膜干细胞,PDLSC)中的MSCs的血管生成促进能力,以探索牙周炎中血管生成改变的机制。

从健康和牙周炎患者的牙周韧带组织(分别为HPDLSCs和PPDLSCs)分离PDLSCs。在体外使用炎性细胞因子刺激HPDLSCs(IPDLSC)。在与ECs共培养之前,通过qRT-PCR和western-blot在PDLSCs中评估促血管生成细胞因子的表达和自噬。通过基质胶管形成试验检查ECs在共培养系统中的血管生成能力。使用雷帕霉素和用于Beclin-1的pcDNA(cDNA-Beclin-1)促进PDLSCs的自噬,并且使用siRNA Beclin-1(siBeclin-1)来抑制。

结果显示,炎症环境增加PDLSCs的自噬和碱性成纤维细胞生长因子(bFGF)和血管生成素(Ang)的表达。在共培养系统中,肿瘤坏死因子α(TNF-α)和白细胞介素-1β(IL-1β)预处理的ECs中观察到更多的血管形成。使用雷帕霉素处理或用cDNA-Beclin-1转染的PDLSCs显示出更高的bFGF和Ang表达水平,其促进共培养的ECs形成血管。使用siBeclin-1转染的PDLSCs则产生相反的结果。

综上所述,该研究结果表明,自噬调节PDLSCs的血管生成促进能力,其可以通过炎性环境增加。

原始出处:

Wei W, An Y, et al., Activation of autophagy in periodontal ligament mesenchymal stem cells promotes angiogenesis in periodontitis. J Periodontol. 2018 Apr 1. doi: 10.1002/JPER.17-0341.

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    2018-12-29 feather89
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    2018-09-21 xqptu
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    2018-04-05 虈亣靌

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Adv Sci:代谢调控成骨新机制

近日,中国科学院深圳先进技术研究院生物医药与技术研究所管敏研究组、中科院合肥物质科学研究院强磁场科学中心王俊峰研究组合作,在代谢调控间充质干细胞成骨机制研究中取得进展。

Stem cells:间充质干细胞不能适应低糖环境,细胞内糖储量迅速耗竭,可解释为何移植后间充质干细胞存活率低。

间充质干细胞(MSCs)在组织工程(TE)中具有相当大的潜力。但是,进行外源性干预时存活率低,限制了MSCs的治疗潜力。既往研究表明葡萄糖(glc)缺乏(缺氧不是)对人类MSCs来说是致命的,因为在人类MSCs(hMSCs)移植过程中,葡萄糖充当其促存活和促血管生成分子。但,目前尚不明确移植过程中MSCs通过哪条能量代谢途径来代谢glc,是否存在可代替glc的能量营养?更重要的是,hMSCs内是否

Cell Death Differ:发现间充质干细胞免疫调节和疾病治疗的重要机制

近期,国际学术期刊Cell Death & Differentiation在线发表了上海营养与健康研究院(暂名)时玉舫和王莹研究团队题为“Kynurenic acid, an IDO metabolite, controls TSG-6-mediated immunosuppression of human mesenchymal stem cells”的研究论文。该团队利用人间充质干细胞治疗小鼠

Stem cells:间充质干细胞可通过脑源性神经保护因子/雷帕霉素信号通路增强自噬对缺氧缺血性脑损伤发挥保护作用

缺氧缺血性脑病(HIE)是一种严重的新生儿疾病。但目前的治疗策略尚不能有效治疗HIE。既往研究表明间充质干细胞(MSCs)对脑损伤具有神经保护性作用,但其潜在机制尚不明确。研究人员通过在HI环境下于体外共培养大鼠皮质神经元和MSCs发现,MSCs有助于增加培养基中的脑源性神经营养因子(BDNF)和自噬标志物(LC3II和Beclin1),并减少细胞死亡(乳酸脱氢酶水平)。研究人员利用移植了MSCs

Stem cells:TLR4-PAR1轴调控实验性细菌性肺炎的骨髓间充质干细胞的存活和治疗作用

现已发现骨髓来源的间充质干细胞在肺炎和肺损伤的实验模型中具有重要的治疗作用。Naceen Gupta等人对Toll样受体4(TLR4)和蛋白激酶激活受体1(PAR1)通路对间充质干细胞(MSC)在肺炎的小鼠模型中存活和治疗活性的作用进行研究。分离来源于TLR4-/-和R41Q-PAR1突变小鼠的MSCs,检测突变的特异性通路,在体外细胞毒性刺激下,对MSC存活情况的影响。此外,并利用一大肠杆菌肺炎