PubMed:9160887 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PubMed/sourceid/9160887","sourcedb":"PubMed","sourceid":"9160887","source_url":"http://www.ncbi.nlm.nih.gov/pubmed/9160887","text":"Characterization of peripheral blood T-lymphocytes transduced with HTLV-I Tax mutants with different trans-activating phenotypes.\nTax1, a transcriptional trans-activator of the Human T-cell leukemia virus type I (HTLV-I), induces the expression of many cellular genes through interaction with at least three distinct cellular transcription factors; CREB/ATF, NF-kappaB, and SRF. This Tax1-induced activation of cellular genes is considered to be a critical event in T-cell transformation by HTLV-I. To elucidate the role of each Tax1-inducible transcriptional pathway in T-cell transformation, we introduced Tax1 mutants with different trans-activating phenotypes into peripheral blood lymphocytes (PBL) by retroviral vectors. Analysis of these PBLs revealed that activation of the NF-kappaB pathway is sufficient to promote the growth response to IL-2. However, for the clonal expansion of CD4+ T-cells, which is a characteristic result of HTLV-I infection, activation of the CREB/ATF and SRF pathways is also 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