JASN:结缔组织生长因子加剧肾脏纤维化

2017-06-26 许奕晗 MedSci原创

结缔组织生长因子(CTGF),是由4种不同的细胞因子组合而成的基质相关蛋白,在血管形成、伤口愈合和纤维化中发挥作用,而且在成纤维细胞和肌成纤维细胞中上调。近日,肾脏病领域权威杂志Journal of the American Society of Nephrology上发表的一篇文章研究了CTGF在纤维化细胞中发挥的作用。

结缔组织生长因子(CTGF),是由4种不同的细胞因子组合而成的基质相关蛋白,在血管形成、伤口愈合和纤维化中发挥作用,而且在成纤维细胞和肌成纤维细胞中上调。近日,肾脏病领域权威杂志Journal of the American Society of Nephrology上发表的一篇文章研究了CTGF在纤维化细胞中发挥的作用。

在小鼠中,由肾周细胞和成纤维细胞特异性诱导过度表达的CTGF与肾脏或肾稳态并没有多大关系,但在输尿管梗阻后加重了炎症反应和纤维化。这需要WNT受体低密度脂蛋白受体相关蛋白6(LRP6)。除此之外,从这些小鼠分离的肾周细胞在CTGF过度表达上表现为过度的游走性和增值性。

CTGF在体内裂解成不同的域。用重组域1、1+2(N端)、4(C端)独自激活培养的肾周细胞中的成纤维细胞分化和伤口愈合反应,域4显示出广泛的纤维化活性。域4在体外结合力分析中显示出与LRP6的低亲和力,而且LRP6或其关键的信号转导通路下游的抑制剂,包括JNK和WNT /β-catenin,抑制了域4的生物活性。使用针对CTGF域4的封闭抗体或重组Dickkopf相关蛋白-1--LRP6内源性抑制剂,可以有效抑制体内输尿管梗阻相关的炎症反应和纤维化。

因此,CTGF域4和WNT信号通路成为纤维化的重要的新目标。

原始出处:
Bryce G. Johnson.et al.Connective Tissue Growth Factor Domain 4 Amplifies Fibrotic Kidney Disease through Activation of LDL Receptor-Related Protein 6. J Am SOC NEPHROL.2017.

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    2017-08-03 chenhongpeng
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    2017-06-26 xuyihan

    文章写的很好

    0