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Early activation of mitogen-activated protein kinase kinase, extracellular signal-regulated kinase, p38 mitogen-activated protein kinase, and c-Jun N-terminal kinase in response to binding of simian immunodeficiency virus to Jurkat T cells expressing CCR5 receptor


Early activation of mitogen-activated protein kinase kinase, extracellular signal-regulated kinase, p38 mitogen-activated protein kinase, and c-Jun N-terminal kinase in response to binding of simian immunodeficiency virus to Jurkat T cells expressing CCR5 receptor



Virology 252(1): 210-217



ISSN/ISBN: 0042-6822

PMID: 9875330

DOI: 10.1006/viro.1998.9466

We have shown that the binding of simian immunodeficiency virus (SIV) to Jurkat T cells expressing CD4 receptor strongly induces mitogen-activated protein (MAP) kinase kinase (MEK) and extracellular signal-regulated kinases 1 and 2 (ERK1/2) and only weakly induces p38 MAP kinase and c-Jun N-terminal kinase (JNK). Similarly, T-tropic NL4-3 virus, which uses both CD4 and CXCR4 receptors for entry, stimulated in these cells the MEK/ERK MAP kinase (MAPK) pathway in a CD4 receptor-dependent manner (Popik and Pitha, 1998). In contrast, both macrophage-tropic SIVmac316 and T cell-tropic SIVmac239, which in addition to CD4 require CCR5 coreceptor for entry, significantly enhanced early MEK/ERK, p38 MAPK, and JNK signaling in Jurkat cells expressing constitutively or transiently the CCR5 receptor. Together, this study provides the evidence that viruses using CXCR4 or CCR5 receptors for entry may differentially use signaling properties of their specific coreceptors to stimulate MAP kinase cascades. In addition, although SIVmac239 and SIVmac316 use different structural domains of the CCR5 receptor for entry, both viruses stimulate early phosphorylation of MEK, ERK, p38, and JNK independently of their tropism and replication.

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Accession: 045854464

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