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
复制标题
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
中科院分区:
文献类型:
--
作者:
K. Nooter;P. Sonneveld;A. Janssen;R. Oostrum;T. Boersma;H. Herweijer;Dinko Valerjo;A. Hagemeijer;F. Baas
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
影响因子:
5.2
作者:
Krishan,A
通讯作者:
Krishan,A