Zika virus-induces metabolic alterations in fetal neuronal progenitors that could influence in neurodevelopment during early pregnancy
Gilbert, J.; Purnama, U.; Molnar, Z.; James, W. S.
Show abstract
Neuronal progenitor subtypes have distinct fate restrictions regulated by time-dependent activation of energetic pathways. Thus, the hijacking of cellular metabolism by Zika virus (ZIKV) to support its replication may contribute to damage in the developing fetal brain. Here, we showed that ZIKV replicates differently in two glycolytically distinct hiPSC-derived neuronal progenitors that correspond to early and late progenitors in the forebrain. This differential replication alters the transcription of metabolic genes and upregulates the glycolytic capacity of progenitor subtypes. Analysis using Imagestream(R) revealed that, during early stages of infection, ZIKV replication in early progenitors increases lipid droplet abundance and decreases mitochondrial size and membrane potential. During later stages infection, early progenitors show increased subcellular distribution of lipid droplets, whilst late progenitors show decreased mitochondria size. The finding that there are hi-NPC subtype-specific alterations of cellular metabolism during ZIKV infection may help to explain the differences in brain damage over each trimester.
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