首页> 外文期刊>Cell biology international. >Role of altholactone in inducing type II apoptosis signalling pathway and expression of cancer-related genes in cervical carcinoma HeLa cell line.
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Role of altholactone in inducing type II apoptosis signalling pathway and expression of cancer-related genes in cervical carcinoma HeLa cell line.

机译:内酯在宫颈癌HeLa细胞系中诱导II型细胞凋亡信号通路和癌相关基因表达的作用。

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Goniothalamus species (Annonaceae) is a shrub that grows in the rainforest of tropical Asia. Several compounds have been isolated and exhibit the potential use for cancer treatment. In this work, altholactone isolated from Goniothalamus macrophyllus was investigated for its cytotoxicity, apoptosis signalling and the expression of cancer-related genes in the cervical carcinoma HeLa cells. Cytotoxicity was evaluated by MTT assay. Apoptotic characteristics were evaluated by morphological studies. Caspase-3 activity was detected using a fluorogenic substrate. Cytochrome c release from mitochondria and protein Bid were determined by Western blotting and cancer-related genes expression by RT-PCR. The results demonstrated that altholactone was cytotoxic to HeLa (IC50 ?=?9.6?μg/mL), and apoptotic cell death was manifested by appearance of chromatin condensation and caspase-3 activation, which was inhibited by specific inhibitors of both caspase-8 and -9. Release into the cytosol of cytochrome and cleavage of Bid occurred. Altholactone also caused a decrease in bcl-2 and an increase in p53 expression. These unique properties of altholactone suggest a potential for cancer chemotherapy.
机译:淋菌属(Annonaceae)是一种灌木,生长在亚洲热带雨林中。已分离出几种化合物,它们显示出潜在的癌症治疗用途。在这项工作中,研究了从大叶菊(Goniothalamus macrophyllus)分离的甲内酯的细胞毒性,凋亡信号转导以及宫颈癌HeLa细胞中癌相关基因的表达。通过MTT测定评估细胞毒性。通过形态学研究评估细胞凋亡特征。使用荧光底物检测Caspase-3活性。通过Western印迹测定线粒体中细胞色素c的释放和Bid蛋白,RT-PCR测定癌症相关基因的表达。结果表明,甲内酯对HeLa具有细胞毒性(IC50≤=9.6μg/ mL),凋亡细胞死亡表现为染色质凝聚和caspase-3激活,而caspase-8和caspase-8的特异性抑制剂均抑制了凋亡。 -9。释放到细胞质中的细胞色素和Bid的裂解。甲内酯还引起bcl-2的减少和p53表达的增加。甲藻内酯的这些独特性质暗示了癌症化学疗法的潜力。

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