shRNA干扰基膜聚糖调控肝癌细胞侵袭和迁移能力的实验研究

目的本研究旨在探索沉默基膜聚糖(lumican)对肝癌细胞侵袭和迁移的影响及其分子机制。方法通过shRNA沉默肝癌细胞HepG2和MHCC97H中的lumican。通过实时定量PCR（qRT-PCR)检测细胞中lumican的mRNA水平，Transwell检测细胞侵袭，划痕实验分析细胞迁移。蛋白印记检测lumican、MMP-9、VEGF、ERK1、JNK、p-ERK1和p-JNK蛋白水平。结果肝癌细胞HepG2和MHCC97H中lumican的mRNA水平和蛋白质水平高于正常肝细胞L02 (P<0.01)。HepG2和MHCC97H细胞中lumican shRNA组mRNA水平和蛋白质水平低于对照组(P<0.01)。与scramble组相比，HepG2和MHCC97H细胞中lumican shRNA组细胞侵袭和迁移显著降低(P<0.01)。HepG2和MHCC97H细胞中lumican shRNA组MMP-9和VEGF表达低于scramble组(P<0.01)。与scramble组相比，HepG2和MHCC97H细胞中lumican shRNA组p-ERK1和p-JNK蛋白水平下降(P<0.01)。结论 shRNA干扰lumican通过抑制ERK1/JNK通路激活减弱肝癌细胞侵袭和迁移。

英文摘要:

Objective To explore the effect of silencing lumican on the invasion and migration of liver cancer cells. Methods Lumican was silenced by shRNA in liver cancer cells (HepG2 and MHCC97H). The mRNA levels of lumican were detected by qRT-PCR. Cell invasion was measured by Transwell. Cell migration was tested via wound healing. The protein levels of lumican, MMP-9, VEGF, ERK1, JNK, p-ERK1 and p-JNK were measured by Western blot. Results Liver cancer cells (HepG2 and MHCC97H) had higher levels of mRNA and protein of lumican compared with normal hepatocyte L02 (P<0.01). shRNA lowered the levels of mRNA and protein of lumican (P<0.01), and weakened the invasion and migration of cancer cells (P<0.01). The expressions of MMP-9 and VEGF decreased with the shRNA silence (P<0.01). shRNA also reduced the protein level of p-ERK1 and p-JNK (P<0.01). Conclusion Silencing lumican by shRNA attenuates the invasion and migration of liver cancer cells via inhibiting the activation of ERK1/JNK pathway.

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