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在对表鬼臼毒素产生耐药性的人癌细胞系中多药耐药蛋白基因的过表达。

Overexpression of multidrug resistance protein gene in human cancer cell lines selected for drug resistance to epipodophyllotoxins.

作者信息

Koike K, Abe T, Hisano T, Kubo T, Wada M, Kohno K, Kuwano M

机构信息

Department of Biochemistry, Kyushu University School of Medicine, Fukuoka.

出版信息

Jpn J Cancer Res. 1996 Jul;87(7):765-72. doi: 10.1111/j.1349-7006.1996.tb00290.x.

Abstract

Overexpression of either the multidrug resistance 1 (MDR1) gene or multidrug resistance protein (MRP) gene is involved in acquisition of multidrug-resistant phenotypes in human cancer cells. In this study we examined whether selection for resistance to the epipodophyllotoxins, etoposide/teniposide (VP16/VM26), could induce overexpression of MDR1 or MRP. We have previously isolated two VP16/VM26-resistant KB cell lines. Two VP16/VM26-resistant KB cell lines, KB/VM-1 and KB/ VM-4, which were selected by stepwise exposure to VM26 had decreased accumulation of [3H]VP16 and increased levels of MRP, but no apparent expression of MDR1 gene was observed. Another VP16/VM26-resistant KB cell line, KB/VP-4, which was further isolated from a VP16-resistant KB cell line, KB/VP-2, had decreased accumulation of [3H]VP16 and showed overexpression of MRP gene, but not that of MDR1 gene. We also isolated a VP16-resistant cell line, IN157/VP-1, from a human glioma cell line IN157. IN157/VP-1 cells showed decreased accumulation of [3H]VP16 and overexpression of MRP gene, but not of MDR1. These findings suggest that selection for resistance to VP16/VM26, preferentially induces overexpression of MRP gene.

摘要

多药耐药1(MDR1)基因或多药耐药蛋白(MRP)基因的过表达与人类癌细胞多药耐药表型的获得有关。在本研究中,我们检测了对表鬼臼毒素、依托泊苷/替尼泊苷(VP16/VM26)的耐药性选择是否能诱导MDR1或MRP的过表达。我们之前分离出了两个对VP16/VM26耐药的KB细胞系。通过逐步暴露于VM26筛选出的两个对VP16/VM26耐药的KB细胞系,KB/VM-1和KB/VM-4,其[3H]VP16的蓄积减少,MRP水平升高,但未观察到MDR1基因的明显表达。另一个对VP16/VM26耐药的KB细胞系,KB/VP-4,是从对VP16耐药的KB细胞系KB/VP-2中进一步分离得到的,其[3H]VP16的蓄积减少,显示出MRP基因的过表达,但未显示MDR1基因的过表达。我们还从人胶质瘤细胞系IN157中分离出了一个对VP16耐药的细胞系,IN157/VP-1。IN157/VP-1细胞显示[3H]VP16的蓄积减少,MRP基因过表达,但MDR基因未过表达。这些发现表明,对VP16/VM26的耐药性选择优先诱导MRP基因的过表达。

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本文引用的文献

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Biology of the multidrug resistance-associated protein, MRP.多药耐药相关蛋白MRP的生物学特性
Eur J Cancer. 1996 Jun;32A(6):945-57. doi: 10.1016/0959-8049(96)00046-9.

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