کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2051880 1074213 2007 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Critical function of Ikaros in controlling Aiolos gene expression
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
Critical function of Ikaros in controlling Aiolos gene expression
چکیده انگلیسی

To characterize the regulation of lymphoid Aiolos transcription factor, we have cloned its promoter. Full promoter and nested deletions were expressed in lymphoid and non-lymphoid cell lines. The minimal promoter activity could be considered as a 172 bp upstream from the ATG for Jurkat and HEK293 cells and as a 370 bp fragment for U937 cells. Moreover, we have mapped the transcription initiation site. Retardation gels showed binding activity for Ikaros, NFκB and AP4 transcription factors and mutations in their binding sites abolish Aiolos promoter activity. Chromatin immunoprecipitation assay revealed that Ikaros, NFκB and AP4 are bound to Aiolos promoter. The important function of Ikaros and NFκB is underlined by their over expression, which results in the trans-activation of the promoter and drives Aiolos expression in cell lines and in freshly isolated B and T cells, while over expression of a dominant negative Ikaros isoform is able to block Aiolos expression.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: FEBS Letters - Volume 581, Issue 8, 17 April 2007, Pages 1605–1616
نویسندگان
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