Department of Medicine, North Shore University Hospital Manhasset and Long Island Jewish Medical Center, New Hyde Park, New York, USA.
Ren Fail. 2010 Jan;32(2):254-8. doi: 10.3109/08860220903491240.
Mesangial cell (MC) proliferation is a hallmark of many progressive renal diseases. Heme oxygenase-1 (HO-1) has been shown to have an anti-proliferative effect on vascular smooth muscle cells. In the present study, we evaluated the role of HO-1 on MC proliferation and the involved molecular mechanism. Both epidermal growth factor (EGF) and hepatocyte growth factor (HGF) not only enhanced mesangial cell HO-1 expression but also stimulated proliferation of MCs. Interestingly, inhibition of HO-1 induction (by zinc protoporphyrin, ZnP) was associated with an accelerated mitogenic response to EGF and HGF in MCs. Induction of HO-1 was associated with enhanced mesangial cell p21 expression. On the other hand, hemoglobin and ZnP inhibited mesangial cell p21 expression. It appears that the effect of HO-1 on MC growth may be mediated through upregulation of p21 expression.
系膜细胞增殖是许多进行性肾脏疾病的标志。血红素加氧酶-1(HO-1)已被证明对血管平滑肌细胞具有抗增殖作用。在本研究中,我们评估了 HO-1 在系膜细胞增殖中的作用及其涉及的分子机制。表皮生长因子(EGF)和肝细胞生长因子(HGF)不仅增强了系膜细胞 HO-1 的表达,还刺激了 MC 的增殖。有趣的是,HO-1 诱导的抑制(通过锌原卟啉,ZnP)与 MC 中对 EGF 和 HGF 的有丝分裂反应加速有关。HO-1 的诱导与系膜细胞 p21 表达的增强有关。另一方面,血红蛋白和 ZnP 抑制系膜细胞 p21 的表达。HO-1 对 MC 生长的影响似乎可以通过上调 p21 表达来介导。