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原文:Journal of Virology doi: 10.1128/JVI.01120-13- a5 c' N0 z7 N8 k; V5 H2 L
2 D( c, Z7 _% A8 d4 S xLater Passage Neural Progenitor Cells from Neonatal Brain Are More Permissive for Human Cytomegalovirus Infection( \' _ L+ s1 P9 f, c3 M s
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Xing Pan1, Xiao-Jun Li1, Xi-Juan Liu1, Hui Yuan2, Jia-Fu Li3, Ying-Liang Duan1, Han-Qing Ye1, Ya-Ru Fu1, Guan-Hua Qiao1, Cong-Cong Wu1, Bo Yang1, Xiao-Hui Tian1, Kang-Hong Hu1, Ling-Feng Miao1, Xiao-Ling Chen1, Jun Zheng4, Simon Rayner1, Philip H. Schwartz5, William J. Britt6, Jiang Xu4* and Min-Hua Luo1*
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8 c: G! D6 p! T; `. ]3 H: l; ^Congenital human cytomegalovirus (HCMV) infection is the most frequent infectious cause of birth defects, primarily neurological disorders. Neural progenitor/stem cells (NPCs) are the major cell type in the subventricular zone and are susceptible to HCMV infection. In culture, the differentiation status of NPCs may change with passage, which in turn may alter susceptibility to virus infection. Previously, only early passage (<passage 9) NPCs were studied and shown to be permissive to HCMV infection. In this study NPC cultures derived at different gestational ages were evaluated after short (passage 3-6) and extended (passage11-20) in vitro passage for biological and virological parameters (i.e. cell morphology, expression of NPC markers and HCMV receptors, viral entry efficiency, viral gene expression, virus-induced cytopathic effect, and release of infectious progeny). These parameters were not significantly influenced by gestational age of the source tissues. However, extended passage cultures showed evidence of differentiation, increased viral entry, and more efficient production of infectious progeny. These results confirm that NPCs are fully permissive for HCMV infection and extended passage NPCs are differentiated and more permissive for HCMV infection. Later passage NPCs being differentiated and more permissive for HCMV infection suggest that HCMV infection in fetal brain may cause more neural cell loss and give rise to severe neurological disabilities with advancing brain development. |
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