The Mechanism of the Zika Virus Crossing the Placental Barrier and the Blood-Brain Barrier

Frontiers in Microbiology
Chi-Fen ChiuYueh-Hsin Ping

Abstract

Zika virus (ZIKV) infection causes severe neurological symptoms in adults and fetal microcephaly and the virus is detected in the brain of microcephaly and meningoencephalitis patient. However, the mechanism of ZIKV crossing the physiological barrier to the central nervous systems (CNS) remains elusive. The placental barrier and the blood brain barrier (BBB) protect the fetus from pathogens and ensure healthy brain development during pregnancy. In this study, we used human placenta trophoblasts cells (JEG-3) and human brain-derived endothelial cells (hCMEC/D3) as in vitro models of the physiological barriers. Results showed that ZIKV could infect JEG-3 cells effectively and reduce the amounts of ZO-1 and occludin between adjacent cells by the proteasomal degradation pathway, suggesting that the permeability of the barrier differentially changed in response to ZIKV infection, allowing the virus particle to cross the host barrier. In contrast, ZIKV could infect hCMEC/D3 cells without disrupting the BBB barrier permeability and tight junction protein expression. Although no disruption to the BBB was observed during ZIKV infection, ZIKV particles were released on the basal side of the BBB model and infected underlying cells. In add...Continue Reading

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Citations

Sep 10, 2020·Innate Immunity·Zhuangzhuang Chen, Guozhong Li
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Datasets Mentioned

BETA
KU501215
GTX133314

Methods Mentioned

BETA
ELISA
PCR
confocal microscopy
Fluorescence
gel filtration

Software Mentioned

Prism
ImageJ
GraphPad

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