A Plasmodium falciparum genetic cross reveals the contributions of pfcrt and plasmepsin II/III to piperaquine drug resistance

Piperaquine (PPQ) is widely used in combination with dihydroartemisinin (DHA) as a first-line treatment against malaria parasites. Multiple genetic drivers of PPQ resistance have been reported, including mutations in the Plasmodium falciparum chloroquine resistance transporter (pfcrt) and increased copies of plasmepsin II/III (pm2/3). We generated a cross between a Cambodia-derived multi-drug resistant KEL1/PLA1 lineage isolate (KH004) and a drug susceptible parasite isolated in Malawi (Mal31). Mal31 harbors a wild-type (3D7-like) pfcrt allele and a single copy of pm2/3, while KH004 has a chloroquine-resistant (Dd2-like) pfcrt allele with an additional G367C substitution and four copies of pm2/3. We recovered 104 unique recombinant progeny and examined a targeted set of progeny representing all possible combinations of variants at pfcrt and pm2/3 for detailed analysis of competitive fitness and a range of PPQ susceptibility phenotypes, including PPQ survival assay (PSA), area under the dose-response curve (AUC), and a limited point IC50 (LP-IC50). We find that inheritance of the KH004 pfcrt allele is required for PPQ resistance, whereas copy number variation in pm2/3 further enhances resistance but does not confer resistance in the absence of PPQ-R-associated mutations in pfcrt. Deeper investigation of genotype-phenotype relationships demonstrates that progeny clones from experimental crosses can be used to understand the relative contributions of pfcrt, pm2/3, and parasite genetic background, to a range of PPQ-related traits and confirm the critical role of the PfCRT G367C substitution in PPQ resistance.

Medienart:

E-Artikel

Erscheinungsjahr:

2023

Erschienen:

2023

Enthalten in:

Zur Gesamtaufnahme - year:2023

Enthalten in:

bioRxiv : the preprint server for biology - (2023) vom: 17. Sept.

Sprache:

Englisch

Beteiligte Personen:

Kane, John [VerfasserIn]
Li, Xue [VerfasserIn]
Kumar, Sudhir [VerfasserIn]
Button-Simons, Katrina A [VerfasserIn]
Brenneman, Katelyn M Vendrely [VerfasserIn]
Dahlhoff, Haley [VerfasserIn]
Sievert, Mackenzie A C [VerfasserIn]
Checkley, Lisa A [VerfasserIn]
Shoue, Douglas A [VerfasserIn]
Singh, Puspendra P [VerfasserIn]
Abatiyow, Biley A [VerfasserIn]
Haile, Meseret T [VerfasserIn]
Nair, Shalini [VerfasserIn]
Reyes, Ann [VerfasserIn]
Tripura, Rupam [VerfasserIn]
Peto, Tom [VerfasserIn]
Lek, Dysoley [VerfasserIn]
Kappe, Stefan H I [VerfasserIn]
Dhorda, Mehul [VerfasserIn]
Nkhoma, Standwell C [VerfasserIn]
Cheeseman, Ian H [VerfasserIn]
Vaughan, Ashley M [VerfasserIn]
Anderson, Timothy J C [VerfasserIn]
Ferdig, Michael T [VerfasserIn]

Links:

Volltext

Themen:

Preprint

Anmerkungen:

Date Revised 27.02.2024

published: Electronic

Citation Status PubMed-not-MEDLINE

doi:

10.1101/2023.06.06.543862

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM362419582