Chimerization at the AQP2-AQP3 locus is the genetic basis of melarsoprol-pentamidine cross-resistance in clinical Trypanosoma brucei gambiense isolates.

Chimerization at the AQP2-AQP3 locus is the genetic basis of melarsoprol-pentamidine cross-resistance in clinical Trypanosoma brucei gambiense isolates.
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DOI:
10.1016/j.ijpddr.2015.04.002
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发表时间:
2015-08
影响因子:
4
通讯作者:
Maeser, Pascal
Maeser, Pascal
中科院分区:
医学2区
文献类型:
--
作者:
Graf, Fabrice E.;Baker, Nicola;Munday, Jane C.;de Koning, Harry P.;Horn, David;Maeser, Pascal

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AQP 2的表达恢复了耐药布氏冈比亚锥虫分离株的药物敏感性来自耐药分离株的AQP 2/3嵌合体不与AQP 2缺失互补。因此,AQP 2/3嵌合伴随着AQP 2的丢失是耐药性的原因。水甘油孔蛋白-2是布氏锥虫实验室菌株中美拉胂醇-喷他脒交叉耐药性的已知决定因素。最近,在刚果民主共和国的昏睡病患者中,从美拉胂醇-喷他脒交叉耐药的布氏冈比亚锥虫分离株中描述了AQP 2-AQP 3串联位点的嵌合。在这里,我们证明,重新引入野生型AQP 2到这些分离株之一完全恢复药物敏感性,而表达嵌合AQP 2/3基因的aqp 2-aqp 3无效T. B.布氏杆菌没有。这证明AQP 2-AQP 3嵌合是冈比亚锥虫B. gambiense分离株中美拉胂醇-喷他脒交叉耐药性的原因。
Expression of AQP2 restores drug susceptibility in a resistant Trypanosoma brucei gambiense isolate. The AQP2/3 chimera from the resistant isolate does not complement AQP2 deletion. Hence AQP2/3 chimerization accompanied by loss of AQP2 is the cause of drug resistance. Aquaglyceroporin-2 is a known determinant of melarsoprol–pentamidine cross-resistance in Trypanosoma brucei brucei laboratory strains. Recently, chimerization at the AQP2–AQP3 tandem locus was described from melarsoprol–pentamidine cross-resistant Trypanosoma brucei gambiense isolates from sleeping sickness patients in the Democratic Republic of the Congo. Here, we demonstrate that reintroduction of wild-type AQP2 into one of these isolates fully restores drug susceptibility while expression of the chimeric AQP2/3 gene in aqp2–aqp3 null T. b. brucei does not. This proves that AQP2–AQP3 chimerization is the cause of melarsoprol–pentamidine cross-resistance in the T. b. gambiense isolates.
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