Progeny counter mechanism in malaria parasites is linked to extracellular resources
Malaria is caused by the rapid proliferation of Plasmodium parasites in patients and disease severity correlates with the number of infected red blood cells in circulation. Parasite multiplication within red blood cells is called schizogony and occurs through an atypical multinucleated cell division...
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| Hauptverfasser: | , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
December 5, 2023
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| In: |
PLoS pathogens
Year: 2023, Jahrgang: 19, Heft: 12, Pages: 1-25 |
| ISSN: | 1553-7374 |
| DOI: | 10.1371/journal.ppat.1011807 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1371/journal.ppat.1011807 Verlag, kostenfrei, Volltext: https://journals.plos.org/plospathogens/article?id=10.1371/journal.ppat.1011807 
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| Verfasserangaben: | Vanessa S. Stürmer, Sophie Stopper, Patrick Binder, Anja Klemmer, Nicolas P. Lichti, Nils B. Becker, Julien Guizetti |
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| 520 | |a Malaria is caused by the rapid proliferation of Plasmodium parasites in patients and disease severity correlates with the number of infected red blood cells in circulation. Parasite multiplication within red blood cells is called schizogony and occurs through an atypical multinucleated cell division mode. The mechanisms regulating the number of daughter cells produced by a single progenitor are poorly understood. We investigated underlying regulatory principles by quantifying nuclear multiplication dynamics in Plasmodium falciparum and knowlesi using super-resolution time-lapse microscopy. This confirmed that the number of daughter cells was consistent with a model in which a counter mechanism regulates multiplication yet incompatible with a timer mechanism. P. falciparum cell volume at the start of nuclear division correlated with the final number of daughter cells. As schizogony progressed, the nucleocytoplasmic volume ratio, which has been found to be constant in all eukaryotes characterized so far, increased significantly, possibly to accommodate the exponentially multiplying nuclei. Depleting nutrients by dilution of culture medium caused parasites to produce fewer merozoites and reduced proliferation but did not affect cell volume or total nuclear volume at the end of schizogony. Our findings suggest that the counter mechanism implicated in malaria parasite proliferation integrates extracellular resource status to modify progeny number during blood stage infection. | ||
| 650 | 4 | |a Cell cycle and cell division | |
| 650 | 4 | |a Malaria | |
| 650 | 4 | |a Malarial parasites | |
| 650 | 4 | |a Merozoites | |
| 650 | 4 | |a Parasitic diseases | |
| 650 | 4 | |a Plasmodium | |
| 650 | 4 | |a Red blood cells | |
| 650 | 4 | |a Transfection | |
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