Discoidin domain receptor 1 kinase activity is required for regulating collagen IV synthesis
作者:Corina M. Borza、Yan Su、Truc-Linh Tran、Ling Yu、Nick Steyns、Kayla J. Temple、Marcin J. Skwark、Jens Meiler、Craig W. Lindsley、Brennan R. Hicks、Birgit Leitinger、Roy Zent、Ambra Pozzi
DOI:10.1016/j.matbio.2016.11.009
日期:2017.1
pro-inflammatory effect, DDR1 plays a deleterious effect in kidney injury by directly regulating extracellular matrix production. We show that DDR1-null mice have reduced deposition of glomerular collagens I and IV as well as decreased proteinuria following the partial renal ablation model of kidney injury. Using mesangial cells isolated from DDR1-null mice, we show that these cells produce significantly less collagen
Discoidin域受体1(DDR1)是一种受体酪氨酸激酶,与胶原结合并被其激活。DDR1表达在肾损伤后增加,并且越来越多的证据表明,DDR1有助于损伤的发展。为此,DDR1的缺失在减轻由血管紧张素输注,单侧输尿管阻塞或肾毒性肾炎引起的肾脏损伤中是有益的。在无DDR1的小鼠中观察到的大多数有益作用都归因于炎症细胞浸润到损伤部位的减少,这表明DDR1发挥了促炎作用。这项研究的目的是确定DDR1除具有促炎作用外,是否还通过直接调节细胞外基质的产生在肾脏损伤中起有害作用。我们显示,DDR1-null小鼠肾损伤的部分肾脏消融模型后,肾小球胶原蛋白I和IV的沉积减少,蛋白尿减少。使用从DDR1空小鼠分离的肾小球系膜细胞,我们显示,与用野生型DDR1重构的DDR1空细胞相比,这些细胞产生的胶原蛋白明显更少。此外,诱变分析显示胶原结合位点或激酶结构域中的突变显着降低了DDR1介导的胶原产生。最后,我们提