» Articles » PMID: 22389733

Molecular Mechanisms of Drug Resistance in Natural Leishmania Populations Vary with Genetic Background

Overview
Date 2012 Mar 6
PMID 22389733
Citations 49
Authors
Affiliations
Soon will be listed here.
Abstract

The evolution of drug-resistance in pathogens is a major global health threat. Elucidating the molecular basis of pathogen drug-resistance has been the focus of many studies but rarely is it known whether a drug-resistance mechanism identified is universal for the studied pathogen; it has seldom been clarified whether drug-resistance mechanisms vary with the pathogen's genotype. Nevertheless this is of critical importance in gaining an understanding of the complexity of this global threat and in underpinning epidemiological surveillance of pathogen drug resistance in the field. This study aimed to assess the molecular and phenotypic heterogeneity that emerges in natural parasite populations under drug treatment pressure. We studied lines of the protozoan parasite Leishmania (L.) donovani with differential susceptibility to antimonial drugs; the lines being derived from clinical isolates belonging to two distinct genetic populations that circulate in the leishmaniasis endemic region of Nepal. Parasite pathways known to be affected by antimonial drugs were characterised on five experimental levels in the lines of the two populations. Characterisation of DNA sequence, gene expression, protein expression and thiol levels revealed a number of molecular features that mark antimonial-resistant parasites in only one of the two populations studied. A final series of in vitro stress phenotyping experiments confirmed this heterogeneity amongst drug-resistant parasites from the two populations. These data provide evidence that the molecular changes associated with antimonial-resistance in natural Leishmania populations depend on the genetic background of the Leishmania population, which has resulted in a divergent set of resistance markers in the Leishmania populations. This heterogeneity of parasite adaptations provides severe challenges for the control of drug resistance in the field and the design of molecular surveillance tools for widespread applicability.

Citing Articles

Identification of CβS and ODC antimony resistance markers in anthroponotic cutaneous leishmaniasis field isolates by gene expression profiling.

Zarrinkar F, Sharifi I, Oliaee R, Afgar A, Molaakbari E, Bamorovat M Parasite Epidemiol Control. 2025; 28:e00413.

PMID: 39959455 PMC: 11830360. DOI: 10.1016/j.parepi.2025.e00413.


Genetic coping mechanisms observed in Leishmania tropica, from the Middle East region, enhance the survival of the parasite after drug exposure.

Glans H, Matos G, Bradley M, Downing T, Andersson B PLoS One. 2024; 19(12):e0310821.

PMID: 39625894 PMC: 11614225. DOI: 10.1371/journal.pone.0310821.


Potential selection of antimony and methotrexate cross-resistance in Leishmania infantum circulating strains.

Bernardo L, Ibarra-Meneses A, Douanne N, Corbeil A, Solana J, Beaudry F PLoS Negl Trop Dis. 2024; 18(2):e0012015.

PMID: 38422164 PMC: 10931519. DOI: 10.1371/journal.pntd.0012015.


The paradigm of intracellular parasite survival and drug resistance in leishmanial parasite through genome plasticity and epigenetics: Perception and future perspective.

Kamran M, Bhattacharjee R, Das S, Mukherjee S, Ali N Front Cell Infect Microbiol. 2023; 13:1001973.

PMID: 36814446 PMC: 9939536. DOI: 10.3389/fcimb.2023.1001973.


Potent Inhibitory Activity of Natural Product Anaephene B and Analogues against In Vitro.

Zaman S, Jones M Molecules. 2023; 28(3).

PMID: 36770614 PMC: 9920133. DOI: 10.3390/molecules28030946.


References
1.
Basu J, Mookerjee A, Sen P, Bhaumik S, Sen P, Banerjee S . Sodium antimony gluconate induces generation of reactive oxygen species and nitric oxide via phosphoinositide 3-kinase and mitogen-activated protein kinase activation in Leishmania donovani-infected macrophages. Antimicrob Agents Chemother. 2006; 50(5):1788-97. PMC: 1472228. DOI: 10.1128/AAC.50.5.1788-1797.2006. View

2.
Sundar S, More D, Singh M, Singh V, Sharma S, Makharia A . Failure of pentavalent antimony in visceral leishmaniasis in India: report from the center of the Indian epidemic. Clin Infect Dis. 2000; 31(4):1104-7. DOI: 10.1086/318121. View

3.
Vanaerschot M, De Doncker S, Rijal S, Maes L, Dujardin J, Decuypere S . Antimonial resistance in Leishmania donovani is associated with increased in vivo parasite burden. PLoS One. 2011; 6(8):e23120. PMC: 3148249. DOI: 10.1371/journal.pone.0023120. View

4.
Beerenwinkel N, Knupfer P, Tresch A . Learning monotonic genotype-phenotype maps. Stat Appl Genet Mol Biol. 2011; 10:Article 3. DOI: 10.2202/1544-6115.1603. View

5.
Downing T, Stark O, Vanaerschot M, Imamura H, Sanders M, Decuypere S . Genome-wide SNP and microsatellite variation illuminate population-level epidemiology in the Leishmania donovani species complex. Infect Genet Evol. 2011; 12(1):149-59. PMC: 3315668. DOI: 10.1016/j.meegid.2011.11.005. View