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
中科院分区:
文献类型:
--
作者:
Graf, Fabrice E.;Baker, Nicola;Munday, Jane C.;de Koning, Harry P.;Horn, David;Maeser, Pascal
关键词:
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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