敲减FGFR1基因表达对婴幼儿血管瘤内皮细胞生物学特性的影响

目的:研究敲减成纤维细胞生长因子受体1(FGFR1)基因的表达对婴幼儿血管瘤内皮细胞(HemECs)活力、凋亡、侵袭和迁移的影响。方法:经转染FGFR1小干扰RNA(si-FGFR1)下调FGFR1表达,研究FGFR1对HemECs生物学特性的影响,以CCK-8法检测细胞活力的变化,流式细胞术检测细胞的凋亡水平, Transwell实验检测细胞侵袭和迁移能力的改变;Western blot法检测磷脂酰肌醇3-激酶(PI3K)、蛋白激酶B(AKT)和磷酸化AKT(p-AKT)的蛋白水平。结果:转染si-FGFR1进入HemECs能够显著抑制细胞的活力(P0.05),促进其凋亡(P0.05),降低细胞的侵袭和迁移能力(P0.05);Western blot结果显示,下调细胞中FGFR1基因的表达可降低PI3K和p-AKT的蛋白水平(P0.05),但对AKT蛋白水平无显著影响。结论:敲减HemECs细胞内FGFR1的表达可通过影响PI3K/AKT信号通路调节婴幼儿血管瘤内皮细胞的生物学特性。

Effect of FGFR1 expression knock-down on biological characteristics of infantile hemangioma endothelial cells

AIM: To study the effect of fibroblast growth factor receptor 1 (FGFR1) expression knock-down on the viability, apoptosis, invasion and migration of infantile hemangioma endothelial cells (HemECs). METHODS: FGFR1 was down-regulated by FGFR1 small interfering RNA (si-FGFR1) transfection. The viability of the cells was measured by CCK-8 assay. The apoptotic rate was analyzed by flow cytometry and the invasion and migration abilities were determined by Transwell assay. The protein levels of phosphatidylinositol 3-kinase (PI3K), protein kinase B (AKT), and phosphorylated AKT (p-AKT) were examined by Western blot. RESULTS: Transfection of si-FGFR1 into HemECs had significant effects on inhibiting cell viability (P<0.05), promoting apoptosis (P<0.05), and decreasing cell invasion and migration abilities (P<0.05). The results of Western blot showed that knockdown of FGFR1 gene expression in the cells reduced the protein levels of PI3K and p-AKT (P<0.05), and had no significant effect on AKT protein level. CONCLUSION: Knock-down of FGFR1 expression changes the biological characteristics of endothelial cells in infantile hemangiomas by regulating PI3K/AKT signaling pathway.