Energy-dependent efflux from Leishmania promastigotes of substrates of the mammalian multidrug resistance pumps

被引:35
作者
Essodaïgui, M
Frézard, F
Moreira, ESA
Dagger, F
Garnier-Suillerot, A
机构
[1] Univ Paris 13, UPRES A 7033, Lab Physicochim Biomol & Cellulaire, F-93017 Bobigny, France
[2] Univ Fed Minas Gerais, Inst Ciencias Biol, Dept Fisiol & Biofis, Belo Horizonte, MG, Brazil
[3] Univ Fed Minas Gerais, Inst Ciencias Biol, Dept Microbiol, Belo Horizonte, MG, Brazil
[4] Cent Univ Venezuela, IBE, Lab Parasitol Expt, Caracas, Venezuela
关键词
Leishmania promastigotes; multidrug resistance; calcein and calcein acetoxymethyl ester (CAL & CAL-AM); pirarubicine (PIR); P-glycoprotein (P-gp); multidrug resistance-associated protein (MRP1);
D O I
10.1016/S0166-6851(99)00036-5
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
We demonstrated the existence of three transport activities in promastigotes of Leishmania braziliensis, Leishmania guyanensis, and Leishmania mexicana. The first activity, an energy-dependent efflux of pirarubicin, was observed in all Leishmania species and inhibited by verapamil, by 2-[4-(diphenylmethyl)-1-piperazinyl]ethyl-5-(trans-4,6-dimethyl-1,3,2-dioxaphosphorinan-2-yl)-2,6-dimethyl-4-(3-nitrophenyl)-3-pyridinecarboxylate P oxide (PAK104P) and by the phenothiazine derivatives: thioridazine, prochlorperazine, trifluoperazine, chlorpromazine and trifluoropromazine. The second activity, an energy-dependent efflux of calcein acetoxymethylester, was observed in all Leishmania species and inhibited by PAK104P and the same phenothiazine derivatives, but not by verapamil. The third activity, an energy-dependent efflux of calcein, was clearly detected in L. braziliensis and guyanensis and inhibited only by prochlorperazine and trifluoperazine. The fact that prochlorperazine and trifluoperazine inhibited the energy-dependent efflux of the three substrates suggests that these activities are mediated by the same transport system. It is noteworthy that the transport system identified in this study shares several properties with the mammalian multidrug resistance pump, MRP,. Pirarubicin, calcein acetoxymethylester and calcein are well known substrates of the MRP. Furthermore, the three types of inhibitors are also inhibitors of the MRP function. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:73 / 84
页数:12
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