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- W4380486542 abstract "Abstract Plasmodium vivax lactate dehydrogenase (PvLDH) is an essential enzyme in the glycolytic pathway of Plasmodium vivax . It can also be used as a diagnostic biomarker. Quantitation of plasma PvLDH has been used as a measure of P. vivax biomass in clinical studies of uncomplicated and severe vivax malaria. With the increasing importance of PvLDH in studying P. vivax diagnosis and infection, improved characterisation of the dynamics of this biomarker is important. In this study, we developed mathematical models that capture parasite and matrix PvLDH dynamics in ex vivo culture and the human host. We estimated the biological parameters using ex vivo and in vivo longitudinal data of parasitemia and PvLDH concentration collected from P. vivax -infected humans using Bayesian hierarchical inference. We found that the ex vivo and in vivo estimates of PvLDH in a parasitized red blood cell differed significantly across the asexual life cycle, with in vivo estimates at least ten-fold higher than ex vivo estimates (for example, the median estimate of intraerythrocytic PvLDH mass at the end of the life cycle was 9.4×10 −3 ng in vivo vs. 5.1×10 −4 ng ex vivo ). We also estimated the ex vivo PvLDH half-life to be 65.3 h (95% credible interval: 60.8—70.7 h), which is approximately three times longer than the median estimate of the in vivo PvLDH half-life, 21.9 h (16.7—29.9 h). Our findings provide an important foundation to further improve quantitative understanding of P. vivax biology and facilitate the development of PvLDH-based diagnostic tools." @default.
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- W4380486542 date "2023-06-12" @default.
- W4380486542 modified "2023-10-14" @default.
- W4380486542 title "Characterisation of<i>Plasmodium vivax</i>lactate dehydrogenase dynamics in<i>P. vivax</i>infections" @default.
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- W4380486542 doi "https://doi.org/10.1101/2023.06.12.544683" @default.
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