Differential gene expression analysis in antimony-unresponsive Indian kala azar (visceral leishmaniasis) clinical isolates by DNA microarray

被引：41

作者：

Singh, N. ^{[1
]}

Almeida, R.

Kothari, H.

Kumar, P.

Mandal, G.

Chatterjee, M.

Venkatachalam, S.

Govind, M. K.

Mandal, S. K.

Sundar, S.

机构：

[1] Cent Drug Res Inst, Lucknow, Uttar Pradesh, India

[2] Addenbrookes Hosp, Wellcome Trust, Cambridge Inst Med Res, Cambridge, England

[3] Inst Post Grad Med Educ & Res, Dept Pharmacol, Kolkata, India

[4] Connexios Life Sci, Bangalore, Karnataka, India

[5] Banaras Hindu Univ, Varanasi 221005, Uttar Pradesh, India

来源：

PARASITOLOGY | 2007年 / 134卷

关键词：

Leishmania; microarray; drug resistance; clinical isolates; flow cytometry;

D O I：

10.1017/S0031182007002284

中图分类号：

R38 [医学寄生虫学]; Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ; 100103 ;

摘要：

In this study, cDNA microarray analysis of a closely related species, Leishmania major, was used as a screening tool to compare antimonial-resistant and susceptible clinical isolates of Leishmania donovani in order to to identify candidate genes on the basis of antimony resistance. Clinically confirmed resistant isolate 39 and sensitive isolate 2001 were used in this study. Many differentially regulated genes were identified whose expression levels differ in sodium antimony gluconate (SAG)-treated patients. Interestingly, genes on the array, showing changes in expression of over 2-fold revealed the identify of ABC transporters, which are known determinants of drug resistance in laboratory Mutants. The functionality of the transporters was validated by flow cytometry which, being biologically informative, provides direct clues to gene function. The results suggest that isolate 39 could have developed resistance by an increased multidrug resistance protein (MRP)-like pump. This study provides preliminary Clues to the role of a thiol-dependent efflux system in antimonial resistant clinical isolates of Leishmania donovani.

引用

页码：777 / 787

页数：11

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