Plasmodium falciparum digestive vacuole function (DV (digestive vacuole))

The Plasmodium falciparum digestive (food) vacuole is an acidic, lysosome-like organelle where the parasite degrades host red blood cell hemoglobin during the intra-erythrocytic stages; hemoglobin-derived heme is detoxified by crystallization into inert hemozoin within this compartment, while short peptides are exported to the parasite cytosol via transporters such as PfCRT; antimalarials including chloroquine and related 4-aminoquinolines act by disrupting hemozoin formation in the vacuole, and artemisinin activation is facilitated by heme within the vacuole, leading to widespread damage; vacuole biogenesis involves endocytosis through a cytostome and fusion of small endocytic vesicles, with vacuolar proteases (e.g., plasmepsins) and other proteins trafficked to the vacuole; alterations in PfCRT and Kelch-13 underlie key resistance mechanisms; released intact vacuoles in severe malaria can activate complement and coagulation, contributing to pathology.

Other names

food vacuoledigestive vacuoleDV

Inhibition of hemozoin formation within the digestive vacuole (e.g., chloroquine, amodiaquine); Heme-activated radical damage to parasite organelles after artemisinin activation in the vacuole environment