Development of an Ectopic huLiver Model forPlasmodiumLiver Stage Infection

Author:

Reyes Gabriela Samayoa,Flaherty Siobhan,Wickham Kristina S.,Viera-Morilla Sara,Strauch Pamela,Roth Alison,Padrón Laura,Jackson ConnerORCID,Meireles Patricia,Calvo David,Roobsoong Wanlapa,Kangwanrangsan Niwat,Sattabongkot Jetsumon,Reichard Gregory,Lafuente-Monasterio Maria José,Rochford RosemaryORCID

Abstract

AbstractEarlyPlasmodium falciparumandP. vivaxinfection requires parasite replication within host hepatocytes, referred to as liver stage (LS). However, limited understanding of infection dynamics in human LS exists due to species-specificity challenges. Reported here is a reproducible, easy-to-manipulate, and moderate-costin vivomodel to study human Plasmodium LS in mice; the ectopic huLiver model. Ectopic huLiver tumors were generated through subcutaneous injection of the HC-04 cell line and shown to be infectible by both freshly dissected sporozoites and through the bite of infected mosquitoes. Evidence for complete LS development was supported by the transition to blood-stage infection in mice engrafted with human erythrocytes. Additionally, this model was successfully evaluated for its utility in testing antimalarial therapeutics, as supported by primaquine acting as a causal prophylactic againstP. falciparum.Presented here is a new platform for the study of humanPlasmodiuminfection with the potential to aid in drug discovery.

Publisher

Cold Spring Harbor Laboratory

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