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Expression and regulation of antiviral protein APOBEC3G in human neuronal cells.

Abstract：

:Apolipoprotein B mRNA-editing enzyme, catalytic polypeptide-like 3G (APOBEC3G) has recently been identified as a potent antiviral protein. Here, we examined the expression and regulation of APOBEC3G in human brain tissues and the cells of central nervous system (CNS). Similar to the immune cells, human brain tissue and the CNS cells expressed APOBEC3G at both mRNA and protein levels. The expression of APOBEC3G could be up-regulated in human neuronal cells (NT2-N) and astrocytes (U87-MG) by interferons (IFN-alpha, beta and gamma), interleukin-1 (IL-1), and tumor necrosis factor. Other cytokines (IL-4, IL-6 and transforming growth factor beta1) and CC-chemokines (CCL3, 4 and 5), however, had little impact on the expression of APOBEC3G. In addition, pseudotyped HIV-1 infection and cytokine/chemokine-enriched supernatants from lipopolysaccharide-stimulated macrophage cultures induced APOBEC3G expression in NT2-N cells. APOBEC3G expressed in the neuronal cells and astrocytes was biologically functional, as the suppression of APOBEC3G expression by the specific siRNA led to increase of pseudotyped HIV-1 replication in these cells. These findings provide direct and compelling evidence that there is intracellular expression and regulation of functional APOBEC3G in the neuronal cells, which may be one of innate defense mechanisms involved in the neuronal protection in the CNS.

journal_name

J Neuroimmunol

journal_title

Journal of neuroimmunology

authors

Wang YJ,Wang X,Zhang H,Zhou L,Liu S,Kolson DL,Song L,Ye L,Ho WZ

doi

10.1016/j.jneuroim.2008.10.003

subject

Has Abstract

pub_date

2009-01-03 00:00:00

pages

14-21

issue

1-2

eissn

0165-5728

issn

1872-8421

pii

S0165-5728(08)00443-8

journal_volume

206

pub_type

杂志文章

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