Expression of the mdr3 gene in prolymphocytic leukemia: Association with cyclosporin‐a‐induced increase in drug accumulation

Expression of the mdr3 gene in prolymphocytic leukemia: Association with cyclosporin‐a‐induced increase in drug accumulation
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mdr3 基因在幼淋巴细胞白血病中的表达:与环孢素 a 诱导的药物蓄积增加的相关性

DOI:
10.1002/ijc.2910450409
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发表时间:
1990
影响因子:
6.4
通讯作者:
F. Baas
F. Baas
中科院分区:
医学1区
文献类型:
--
作者:
K. Nooter;P. Sonneveld;A. Janssen;R. Oostrum;T. Boersma;H. Herweijer;Dinko Valerjo;A. Hagemeijer;F. Baas

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人类和动物细胞系中典型的多药耐药性是由单向跨膜药物流出泵过度活跃引起的,该泵由 MDR 基因编码,在小鼠和人类中称为 mdr 基因,在仓鼠中称为 pgp 基因。在人类中,已鉴定出两个 mdr 基因 mdr1 和 mdr3,它们具有大约 80% 的核苷酸同源性。越来越多的证据表明,mdr1 基因的过度表达在特定肿瘤类型的抗癌药物耐药性中发挥着作用。然而,目前尚无关于 mdr3 在耐药性中可能发挥的作用的数据。在这里,我们报告了 6 名幼淋巴细胞白血病 (PLL) 患者中 6 名的白血病细胞中 mdr3 基因序列的高水平表达。其中 6 个样本中的 5 个未检测到 mdr1 表达,而在一名正在转化为非霍奇金淋巴瘤的 PLL 患者的样本中发现了低水平的 mdr1 表达。除该患者外,所有其他研究的 PLL 病例均未接受过既往化疗。体外药物摄取研究表明,环孢菌素 A 增加了 PLL 细胞中柔红霉素的积累。由于环孢菌素 A 是 mdr1 编码的 P 糖蛋白药物泵的抑制剂,这些数据表明在 PLL 细胞中 mdr3 也编码药物流出泵。我们的研究结果可以部分解释 PLL 对化疗的主要耐药性。
Typical multidrug resistance in human and animal cell lines is caused by overactivity of an unidirectional transmembrane drug efflux pump, encoded by the MDR genes, called mdr genes in mice and humans and pgp genes in hamsters. In humans, two mdr genes, mdr1 and mdr3, with approximately 80% nucleotide homology, have been identified. There is increasing evidence that overexpression of the mdr1 gene plays a role in resistance to anticancer agents in specific tumor types. However, currently no data are available on a possible role for mdr3 in drug resistance. Here we report high levels of expression of mdr3 gene sequences in leukemic cells from 6 out of 6 patients with prolymphocytic leukemia (PLL). No mdr1 expression was detected in 5 out of 6 of these samples, whereas a low level of mdr1 expression was found in a sample from one PLL patient in the course of transformation to non‐Hodgkin's lymphoma. Except for this patient, all other PLL cases studied had not received prior chemotherapy. In vitro drug uptake studies showed that daunorubicin accumulation in PLL cells was increased by cyclosporin A. Since cyclosporin A is an inhibitor of the mdr1‐encoded P‐glycoprotein drug pump, these data suggest that in PLL cells mdr3 also codes for a drug efflux pump. Our findings could partly explain the primary refractoriness of PLL to chemotherapy.
DOI: --
发表时间: 1982
期刊: The Journal of biological chemistry
影响因子: --
作者:
White,BA;Bancroft,FC
通讯作者: Bancroft,FC
DOI: 10.1073/pnas.83.12.4538
发表时间: 1986-06-01
影响因子: 11.1
作者:
RONINSON, IB;CHIN, JE;PASTAN, I
通讯作者: PASTAN, I
流式细胞仪监测肿瘤细胞中蒽环类药物的转运。
DOI: 10.1111/j.1749-6632.1986.tb42030.x
发表时间: 1986
影响因子: 5.2
作者:
Krishan,A
通讯作者: Krishan,A