Functional analysis of Plasmodium falciparum subpopulations associated with artemisinin resistance in Cambodia

Dwivedi Ankit, Reynes Christelle, Kuehn Axel, Roche Daniel B., Khim Nimol, Hebrard Maxim, Milanesi Sylvain, Rivals Eric, Frutos Roger, Menard Didier, Mamoun Choukri Ben, Colinge Jacques, Cornillot Emmanuel. 2017. Functional analysis of Plasmodium falciparum subpopulations associated with artemisinin resistance in Cambodia. Malaria Journal, 16:493, 17 p.

Url - jeu de données - Entrepôt autre : https://figshare.com/collections/Functional_analysis_of_Plasmodium_falciparum_subpopulations_associated_with_artemisinin_resistance_in_Cambodia/3958435

Quartile : Q1, Sujet : TROPICAL MEDICINE / Quartile : Q1, Sujet : PARASITOLOGY / Quartile : Q2, Sujet : INFECTIOUS DISEASES

Résumé : Background: Plasmodium falciparum malaria is one of the most widespread parasitic infections in humans and remains a leading global health concern. Malaria elimination efforts are threatened by the emergence and spread of resistance to artemisinin-based combination therapy, the first-line treatment of malaria. Promising molecular markers and pathways associated with artemisinin drug resistance have been identified, but the underlying molecular mechanisms of resistance remains unknown. The genomic data from early period of emergence of artemisinin resistance (2008–2011) was evaluated, with aim to define k13 associated genetic background in Cambodia, the country identified as epicentre of anti-malarial drug resistance, through characterization of 167 parasite isolates using a panel of 21,257 SNPs. Results: Eight subpopulations were identified suggesting a process of acquisition of artemisinin resistance consistent with an emergence-selection-diffusion model, supported by the shifting balance theory. Identification of population specific mutations facilitated the characterization of a core set of 57 background genes associated with artemisinin resistance and associated pathways. The analysis indicates that the background of artemisinin resistance was not acquired after drug pressure, rather is the result of fixation followed by selection on the daughter subpopulations derived from the ancestral population. Conclusions: Functional analysis of artemisinin resistance subpopulations illustrates the strong interplay between ubiquitination and cell division or differentiation in artemisinin resistant parasites. The relationship of these pathways with the P. falciparum resistant subpopulation and presence of drug resistance markers in addition to k13, highlights the major role of admixed parasite population in the diffusion of artemisinin resistant background. The diffusion of resistant genes in the Cambodian admixed population after selection resulted from mating of gametocytes of sensitive and resistant parasite populations.

Mots-clés géographiques Agrovoc : Cambodge

Classification Agris : L73 - Maladies des animaux
000 - Autres thèmes

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

Auteurs et affiliations

• Dwivedi Ankit, Institut de Biologie Computationnelle (FRA)
• Reynes Christelle, UM1 (FRA)
• Kuehn Axel, CRLC (FRA)
• Roche Daniel B., Institut de Biologie Computationnelle (FRA)
• Khim Nimol, Institut Pasteur du Cambodge (KHM)
• Hebrard Maxim, Institut de Biologie Computationnelle (FRA)
• Milanesi Sylvain, Institut de Biologie Computationnelle (FRA)
• Rivals Eric, LIRMM (FRA)
• Frutos Roger, CIRAD-BIOS-UMR INTERTRYP (FRA)
• Menard Didier, Institut Pasteur du Cambodge (KHM)
• Mamoun Choukri Ben, Yale University (USA)
• Colinge Jacques, CRLC (FRA)
• Cornillot Emmanuel, Institut de Biologie Computationnelle (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/587302/)

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