Functional activities of the human T-cell leukemia virus type I Tax oncoprotein: cellular signaling through NF-κB

Human T-cell leukemia virus type I (HTLV-I) is the etiological agent for adult T-cell leukemia (ATL), as well as for tropical spastic paraparesis (TSP) and HTLV-I associate myelopathy (HAM). A biological understanding of the involvement of HTLV-I and in ATL has focused significantly on the workings...

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Veröffentlicht in:Cytokine & growth factor reviews 2001-06, Vol.12 (2), p.207-217
1. Verfasser: Jeang, Kuan-Teh
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description Human T-cell leukemia virus type I (HTLV-I) is the etiological agent for adult T-cell leukemia (ATL), as well as for tropical spastic paraparesis (TSP) and HTLV-I associate myelopathy (HAM). A biological understanding of the involvement of HTLV-I and in ATL has focused significantly on the workings of the virally-encoded 40 kDa phospho-oncoprotein, Tax. Tax is a transcriptional activator. Its ability to modulate the expression and function of many cellular genes has been reasoned to be a major contributory mechanism explaining HTLV-I-mediated transformation of cells. In activating cellular gene expression, Tax impinges upon several cellular signal-transduction pathways, including those for CREB/ATF and NF-κB. In this paper, we review aspects of Tax's transcriptional potential with particular focus on recent evidence linking Tax to IKK (IκB-kinase)-complex and MAP3Ks (mitogen-activated protein kinase kinase kinases).
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subjects Adult T-cell leukemia
Animals
AP-1
Cell Nucleus - metabolism
Cell Transformation, Neoplastic - metabolism
Cellular transformation
CREB
Cytoplasm - metabolism
Gene Expression Regulation
Gene Products, tax - chemistry
Gene Products, tax - metabolism
HAM/TSP
HTLV
human T-lymphotropic virus 1
Human T-lymphotropic virus 1 - metabolism
Humans
I-kappa B Kinase
Leukemia-Lymphoma, Adult T-Cell - metabolism
Leukemia-Lymphoma, Adult T-Cell - pathology
Leukemia-Lymphoma, Adult T-Cell - virology
MAP kinase kinase kinase
MAP Kinase Kinase Kinases - metabolism
NF-kappa B - metabolism
NF-κB
Protein-Serine-Threonine Kinases - metabolism
Signal Transduction
Tax
Transcription Factors - metabolism
title Functional activities of the human T-cell leukemia virus type I Tax oncoprotein: cellular signaling through NF-κB
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