PMID- 2358774 OWN - NLM STAT- MEDLINE DCOM- 19900801 LR - 20190508 IS - 0022-1007 (Print) IS - 1540-9538 (Electronic) IS - 0022-1007 (Linking) VI - 172 IP - 1 DP - 1990 Jul 1 TI - Transactivation of the transforming growth factor beta 1 (TGF-beta 1) gene by human T lymphotropic virus type 1 tax: a potential mechanism for the increased production of TGF-beta 1 in adult T cell leukemia. PG - 121-9 AB - We examined the effect of the human T lymphotropic virus type 1 (HTLV-I) Tax gene product on the human transforming growth factor beta 1 (TGF-beta 1) promoter. Transfection of deleted constructs of the TGF-beta 1 promoter revealed regions homologous with AP-1 binding sites that were required for Tax-induced transactivation of the TGF-beta 1 promoter. In addition, we examined the expression and secretion of TGF-beta in fresh leukemic cells isolated from patients with adult T cell leukemia (ATL) and in HTLV-1-infected T cell lines. We report that fresh leukemic cells from ATL patients constitutively produce high levels of TGF-beta 1 mRNA and secrete TGF-beta 1 but not TGF-beta 2 into the culture medium. In addition, long-term ATL cell lines expressed significant amounts of TGF-beta 1 mRNA as well as detectable levels of TGF-beta 1 protein. These results suggest a role for Tax in the upregulation of TGF-beta 1 in HTLV-I-infected cells. FAU - Kim, S J AU - Kim SJ AD - Laboratory of Chemoprevention, National Cancer Institute, Bethesda, Maryland 20892. FAU - Kehrl, J H AU - Kehrl JH FAU - Burton, J AU - Burton J FAU - Tendler, C L AU - Tendler CL FAU - Jeang, K T AU - Jeang KT FAU - Danielpour, D AU - Danielpour D FAU - Thevenin, C AU - Thevenin C FAU - Kim, K Y AU - Kim KY FAU - Sporn, M B AU - Sporn MB FAU - Roberts, A B AU - Roberts AB LA - eng PT - Journal Article PL - United States TA - J Exp Med JT - The Journal of experimental medicine JID - 2985109R RN - 0 (RNA, Messenger) RN - 0 (Trans-Activators) RN - 76057-06-2 (Transforming Growth Factors) SB - IM MH - Cell Line MH - Chromosome Deletion MH - *Gene Expression MH - Human T-lymphotropic virus 1/*genetics MH - Humans MH - Leukemia, T-Cell/genetics/*metabolism/microbiology MH - Mutation MH - Plasmids MH - Promoter Regions, Genetic MH - RNA, Messenger/genetics MH - Restriction Mapping MH - Trans-Activators/*metabolism MH - Transfection MH - Transforming Growth Factors/biosynthesis/*genetics PMC - PMC2188182 EDAT- 1990/07/01 00:00 MHDA- 1990/07/01 00:01 PMCR- 1991/01/01 CRDT- 1990/07/01 00:00 PHST- 1990/07/01 00:00 [pubmed] PHST- 1990/07/01 00:01 [medline] PHST- 1990/07/01 00:00 [entrez] PHST- 1991/01/01 00:00 [pmc-release] AID - 90293671 [pii] AID - 10.1084/jem.172.1.121 [doi] PST - ppublish SO - J Exp Med. 1990 Jul 1;172(1):121-9. doi: 10.1084/jem.172.1.121.