当前位置: X-MOL 学术Histochem. Cell Biol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
EGF neutralization antibodies attenuate liver fibrosis by inhibiting myofibroblast proliferation in bile duct ligation mice.
Histochemistry and Cell Biology ( IF 2.1 ) Pub Date : 2020-03-16 , DOI: 10.1007/s00418-020-01867-9
Hufeng Xu 1, 2 , Lin Liu 1, 2 , Min Cong 1, 2 , Tianhui Liu 1, 2 , Shujie Sun 1, 2 , Hong Ma 1, 2 , Hong You 1, 2 , Jidong Jia 1, 2 , Ping Wang 1, 2
Affiliation  

The expression of epidermal growth factor (EGF) is increased during liver fibrogenesis, and EGF receptor (EGFR) antagonist could attenuate liver fibrosis. Since EGFR is highly expressed by hepatocytes and cholangiocytes in cirrhotic liver, whether hepatic stellate cells express EGFR in response to EGF still needs exploration. Although EGFR antagonist could attenuate liver fibrosis, many ligands with EGF-like domains, besides EGF, can function through EGFR. Whether specifically blocking EGF could attenuate bile duct ligation (BDL)-induced liver fibrosis has not been revealed. BDL induced biliary infarcts and matrix deposition in mouse liver, and EGFR was expressed and phosphorylated by α-smooth muscle actin (αSMA)-positive myofibroblasts. LX-2 cells expressed EGFR, and these receptors were phosphorylated in the in vitro culture system. Growth curve and cell cycle analysis revealed that EGF could enhance cell proliferation of LX-2 cells. In addition, administration of EGF antibodies markedly reduced the EGF level in serum and the deposition of extracellular matrix in the liver of BDL mice when compared to IgG administration. Administration of EGF antibodies also reduced the phosphorylation of EGFR and the percentage of Ki-67-positive or PCNA-positive liver myofibroblasts of BDL mice when compared to IgG administration. Therefore, activated hepatic stellate cells express EGFR, thus being responsive to EGF signal, and administration of EGF antibodies could attenuate liver fibrosis by restricting the proliferation of myofibroblasts.



中文翻译:

EGF中和抗体通过抑制胆管结扎小鼠中的成纤维细胞增殖来减轻肝脏纤维化。

表皮生长因子(EGF)的表达在肝纤维化过程中增加,并且EGF受体(EGFR)拮抗剂可以减轻肝纤维化。由于肝硬化肝细胞中的肝细胞和胆管细胞高表达EGFR,因此肝星状细胞是否响应EGF表达EGFR仍需要探索。尽管EGFR拮抗剂可以减轻肝纤维化,但是除EGF外,许多具有EGF样结构域的配体也可以通过EGFR起作用。尚无特异性阻断EGF能否减轻胆管结扎(BDL)诱导的肝纤维化的研究。BDL诱导小鼠肝脏中的胆道梗塞和基质沉积,EGFR通过α-平滑肌肌动蛋白(αSMA)阳性成肌纤维细胞表达并磷酸化。LX-2细胞表达EGFR,并且这些受体在体外培养系统中被磷酸化。生长曲线和细胞周期分析表明,EGF可以增强LX-2细胞的增殖。另外,与施用IgG相比,施用EGF抗体显着降低了BDL小鼠的血清中EGF水平和细胞外基质在肝脏中的沉积。与给予IgG相比,给予EGF抗体还降低了BDL小鼠的EGFR磷酸化和Ki-67阳性或PCNA阳性的肝成纤维细胞百分比。因此,活化的肝星状细胞表达EGFR,因此对EGF信号有反应,而EGF抗体的给药可以通过限制成肌纤维细胞的增殖来减轻肝纤维化。与给予IgG相比,给予EGF抗体可显着降低BDL小鼠的血清EGF水平和肝外细胞外基质的沉积。与给予IgG相比,给予EGF抗体还降低了BDL小鼠的EGFR磷酸化和Ki-67阳性或PCNA阳性的肝成纤维细胞百分比。因此,活化的肝星状细胞表达EGFR,因此对EGF信号有反应,而EGF抗体的给药可以通过限制成肌纤维细胞的增殖来减轻肝纤维化。与给予IgG相比,给予EGF抗体可显着降低BDL小鼠的血清EGF水平和肝外细胞外基质的沉积。与给予IgG相比,给予EGF抗体还降低了BDL小鼠的EGFR磷酸化和Ki-67阳性或PCNA阳性的肝成纤维细胞百分比。因此,活化的肝星状细胞表达EGFR,因此对EGF信号有反应,而EGF抗体的给药可以通过限制成肌纤维细胞的增殖来减轻肝纤维化。与给予IgG相比,给予EGF抗体还降低了BDL小鼠的EGFR磷酸化和Ki-67阳性或PCNA阳性的肝成纤维细胞百分比。因此,活化的肝星状细胞表达EGFR,因此对EGF信号有反应,而EGF抗体的给药可以通过限制成肌纤维细胞的增殖来减轻肝纤维化。与给予IgG相比,给予EGF抗体还降低了BDL小鼠的EGFR磷酸化和Ki-67阳性或PCNA阳性的肝成纤维细胞百分比。因此,活化的肝星状细胞表达EGFR,因此对EGF信号有反应,而EGF抗体的给药可以通过限制成肌纤维细胞的增殖来减轻肝纤维化。

更新日期:2020-04-21
down
wechat
bug