J Peiodontal Res:颗粒蛋白前体促进人牙周膜干细胞的成骨分化

2020-06-04 网络 网络

颗粒蛋白前体(Progranulin,PGRN)是肿瘤坏死因子(TNF)受体(TNFRs)的拮抗剂,在牙周炎的骨再生中有一定的作用。

颗粒蛋白前体(Progranulin,PGRN)是肿瘤坏死因子(TNF)受体(TNFRs)的拮抗剂,在牙周炎的骨再生中有一定的作用。本研究旨在探讨PGRN在炎症条件下促进人牙周膜干细胞(hPDLSCs)成骨分化的分子机制。

研究采用TNFR1-和TNFR2沉默的hPDLSCs(hPDLSCs-sh-TNFR1和hPDLSCs-sh-TNFR2)分别与含有TNF-α和(或)PGRN的成骨诱导培养基培养。用免疫荧光、定量实时PCR和Western blot分别检测TNFR1/TNFR2和成骨分化标志物的表达,以及NF-κB/MAPK相关通路的磷酸化水平。

免疫荧光和实时PCR结果发现,TNFR1和TNFR2在hPDLSCs中阳性表达。TNF-α可诱导hPDLSCs中ALP和RUNX2表达的降低有统计学意义,而PGRN处理后可显着增强其表达,并逆转TNF-α介导的hPDLSCs中ALP和RUNX2的表达抑制。在hPDLSCs-sh-TNFR1中,TNF-α介导的成骨抑制作用降低,但TNF-α+PGRN和PGRN处理组ALP和RUNX2的表达均显着增加。PGRN显着促进了P-ERK1/2和P-JNK的表达,而相应的抑制剂则消除了PGRN刺激成骨分化的效应。在hPDLSCs-sh-TNFR2中,PGRN组与对照组之间的成骨标志物和P-JNK的表达没有显着差异。因此,PGRN激活了P-ERK1/2的表达,拮抗TNF-α增强的NF-κB P65表达。

PGRN通过TNFR1抑制TNF-α-sensitized NF-κB或通过TNFR2激活JNK信号通路,促进hPDLSCs的成骨分化。但是,PGRN激活ERK信号通路的机制还有待探讨。

原文出处:

Jing Chen,Progranulin promotes osteogenic differentiation of human periodontal ligament stem cells via tumor necrosis factor receptors to inhibit TNF‐α sensitized NF‐kB and activate ERK/JNK signaling,journal of periodontal research,2020 June ,doi: 10.1111/jre.12720

 

 

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    2020-10-27 xqptu
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    2020-10-14 feather89
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    2021-02-23 HinsMax
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    2020-06-07 独孤立克

    干细胞是热点,但是进入临床仍然需要时间和临床疗效验证哦

    0

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