Asiatic acid (AA) is a pentacyclic triterpene in Centella asiatica known to inhibit proliferation and induce apoptosis in several tumor cell lines. In the current study, we synthesized five AA derivatives and examined their inhibitory activities on growth in non-small cell lung cancer cell lines, A549 and PC9/G. Four derivatives were found to have stronger cell growth inhibitory activity than AA. Among them, compound A-3 showed the most significant antiproliferative effects on tumor. Growth of A549 and PC9/G cells was inhibited by A-3 in a dose- and time-dependent manner. To determine the cellular gene expression changes in A549 and PC9/G cells treated with A-3, Affymetrix GeneChip® Human Genome U133 Plus 2.0 Array were used to screen transcriptome differences. Expression levels of 1121 genes in A549 and 1873 genes in PC9/G were significantly altered upon treatment with 10 µM A-3 after 48 h, with 357 overlapping genes. The signaling pathways molecules involved in the antiproliferative and cell cycle dysregulation effects of A-3 identified using microarray were further validated via Western blot analyses. The results collectively indicate that A-3 induces inhibition of cell proliferation via downregulation of the Ras/Raf/MEK/ERK pathway and cell cycle arrest at G1/S and G2/M.
亚细亚酸(
AA)是一种在穿心莲中发现的五环三萜,已知能抑制多种肿瘤
细胞系的增殖并诱导其凋亡。在本研究中,我们合成了五种
AA衍
生物,并检测了它们对非小细胞肺癌
细胞系A549和PC9/G生长的抑制活性。发现其中四种衍
生物的细胞生长抑制活性强于
AA,其中化合物A-3对肿瘤的抗增殖作用最为显著。A-3以剂量和时间依赖的方式抑制A549和PC9/G细胞的生长。为了确定A-3处理后A549和PC9/G细胞的
基因表达变化,我们使用Affymetrix GeneChip®人类
基因组U133 Plus 2.0阵列筛选了转录组差异。经过10 µM A-3处理48小时后,A549细胞中1121个
基因和PC9/G细胞中1873个
基因的表达
水平显著改变,其中357个
基因重叠。通过微阵列识别的与A-3抗增殖和细胞周期失调效应相关的信号通路分子,进一步通过西方印迹分析验证。结果综合表明,A-3通过下调Ras/Raf/MEK/ERK通路和使细胞周期阻滞在G1/S和G2/M阶段来抑制细胞增殖。