کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1930463 | 1050515 | 2011 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Dual effects of HTLV-1 bZIP factor in suppression of interferon regulatory factor 1 Dual effects of HTLV-1 bZIP factor in suppression of interferon regulatory factor 1](/preview/png/1930463.png)
Human T-cell leukemia virus type-1 (HTLV-1) causes ATL in 2.5% of carriers after a long period of latent infection. Moreover, half of adult T-cell leukemia (ATL) patients succumb to this disease within 1 year of onset. HTLV-1 bZIP factor (HBZ) is constitutively expressed in all the ATL cells. Thus, suggesting that HBZ may play a key role in cellular leukemogenesis. Herein we present evidence that interferon regulatory factor IRF-1, which is a member of IRF transcription family, interacts with HBZ. The N-terminal of HBZ interacted with IRF-1. HBZ reduced both IRF-1 DNA-binding activity and stability via a proteasome-dependent pathway. In addition, IRF-1-mediated apoptosis is significantly reduced by ectopic production of the HBZ. These results suggested that HBZ has dual suppressive effects on IRF-1 function, which may contribute to HTLV-1 related pathogenesis.
► The N-terminal region of HBZ interacts with IRF-1.
► HBZ inhibits the transcriptional activity of IRF-1.
► HBZ inhibits the DNA binding ability of IRF-1.
► HBZ enhances IRF-1 degradation.
► HBZ is a negative regulator of IRF-1-mediated apoptosis.
Journal: Biochemical and Biophysical Research Communications - Volume 409, Issue 2, 3 June 2011, Pages 328–332