Characterisation of Plasmodium vivax lactate dehydrogenase dynamics in P. vivax infections.

Autor: Cao, Pengxing, Kho, Steven, Grigg, Matthew J., Barber, Bridget E., Piera, Kim A., William, Timothy, Poespoprodjo, Jeanne R., Jang, Ihn Kyung, Simpson, Julie A., McCaw, James M., Anstey, Nicholas M., McCarthy, James S., Britton, Sumudu
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Zdroj: Communications Biology; 3/22/2024, Vol. 7 Issue 1, p1-11, 11p
Abstrakt: Plasmodium vivax lactate dehydrogenase (PvLDH) is an essential enzyme in the glycolytic pathway of P. vivax. It is widely used as a diagnostic biomarker and a measure of total-body parasite biomass in vivax malaria. However, the dynamics of PvLDH remains poorly understood. Here, we developed mathematical models that capture parasite and matrix PvLDH dynamics in ex vivo culture and the human host. We estimated key biological parameters characterising in vivo PvLDH dynamics based on longitudinal data of parasitemia and PvLDH concentration collected from P. vivax-infected humans, with the estimates informed by the ex vivo data as prior knowledge in a Bayesian hierarchical framework. We found that the in vivo accumulation rate of intraerythrocytic PvLDH peaks at 10–20 h post-invasion (late ring stage) with a median estimate of intraerythrocytic PvLDH mass at the end of the life cycle to be 9.4 × 10−3ng. We also found that the median estimate of in vivo PvLDH half-life was approximately 21.9 h. Our findings provide a foundation with which to advance our quantitative understanding of P. vivax biology and will facilitate the improvement of PvLDH-based diagnostic tools. A modelling framework characterising the dynamics of Plasmodium vivax lactate dehydrogenase provides estimates of key biological parameters to facilitate the development of improved diagnostic tools for the detection of P. vivax. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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