1. Characterization of the Tubovesicular Network in Plasmodium vivax Liver Stage Hypnozoites and Schizonts
- Author
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Kayla Sylvester, Steven P. Maher, Dora Posfai, Michael K. Tran, McKenna C. Crawford, Amélie Vantaux, Benoît Witkowski, Dennis E. Kyle, Emily R. Derbyshire, Duke University Medical Center, University of Georgia [USA], Duke University [Durham], Malaria Molecular Epidemiology, Institut Pasteur du Cambodge, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP), and Work was supported by the Bill & Melinda Gates Foundation (OPP1023643 to DK), the NIH (1DP2AI138239 to ED) for laboratory support, and fellowship support by the NSF (DGE-1644868, to KS).
- Subjects
0301 basic medicine ,Microbiology (medical) ,Plasmodium ,Plasmodium vivax ,Immunology ,malaria ,Biology ,Microbiology ,03 medical and health sciences ,parasitic diseases ,medicine ,MESH: Animals ,[SDV.MP.PAR]Life Sciences [q-bio]/Microbiology and Parasitology/Parasitology ,Host cytosol ,MESH: Schizonts ,Liver stage ,030102 biochemistry & molecular biology ,MESH: Plasmodium ,MESH: Malaria, Vivax ,Parasitophorous vacuole ,AQP3 ,medicine.disease ,biology.organism_classification ,QR1-502 ,tubovesicular network ,vivax ,MESH: Plasmodium vivax ,3. Good health ,Cell biology ,hypnozoites ,030104 developmental biology ,Infectious Diseases ,Malaria ,MESH: Liver - Abstract
Plasmodium is a genus of apicomplexan parasites which replicate in the liver before causing malaria. Plasmodium vivax can also persist in the liver as dormant hypnozoites and cause clinical relapse upon activation, but the molecular mechanisms leading to activation have yet to be discovered. In this study, we use high-resolution microscopy to characterize temporal changes of the P. vivax liver stage tubovesicular network (TVN), a parasitophorous vacuole membrane (PVM)-derived network within the host cytosol. We observe extended membrane clusters, tubules, and TVN-derived vesicles present throughout P. vivax liver stage development. Additionally, we demonstrate an unexpected presence of the TVN in hypnozoites and observe some association of this network to host nuclei. We also reveal that the host water and solute channel aquaporin-3 (AQP3) associates with TVN-derived vesicles and extended membrane clusters. AQP3 has been previously shown to localize to the PVM of P. vivax hypnozoites and liver schizonts but has not yet been shown in association to the TVN. Our results highlight host-parasite interactions occur in both dormant and replicating liver stage P. vivax forms and implicate AQP3 function during this time. Together, these findings enhance our understanding of P. vivax liver stage biology through characterization of the TVN with an emphasis on the presence of this network in dormant hypnozoites.
- Published
- 2021
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