کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5534334 1550840 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
AKT1 has dual actions on the glucocorticoid receptor by cooperating with 14-3-3
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیولوژی سلول
پیش نمایش صفحه اول مقاله
AKT1 has dual actions on the glucocorticoid receptor by cooperating with 14-3-3
چکیده انگلیسی


- AKT has 2 distinct actions on GR transcriptional activity in corporation with 14-3-3.
- One is segregation of GR in the cytoplasm through phosphorylation binding of GR to 14-3-3.
- The other is direct activation of GR transcriptional activity in the nucleus cooperating with 14-3-3.
- Specific modulation of these 2 actions of AKT1/14-3-3 is beneficial for ALL treatment.

Glucocorticoids are important therapeutic compounds for acute lymphoblastic leukemia (ALL). AKT1 or the protein kinase B is frequently activated in ALL, and contributes to the development of glucocorticoid resistance. We examined impact of AKT1 on glucocorticoid receptor (GR)-induced transcriptional activity in cooperation with phospho-serine/threonine-binding protein 14-3-3. AKT1 has two distinct actions on GR transcriptional activity, one through segregation of GR in the cytoplasm by phosphorylating GR at Ser-134 and subsequent association of 14-3-3, and the other through direct modulation of GR transcriptional activity in the nucleus. For the latter, AKT1 and 14-3-3 are attracted to DNA-bound GR, accompanied by AKT1-dependent p300 phosphorylation, H3S10 phosphorylation and H3K14 acetylation at the DNA site. These two actions of AKT1 regulate distinct sets of glucocorticoid-responsive genes. Our results suggest that specific inhibition of the AKT1/14-3-3 activity on the cytoplasmic retention of GR may be a promising target for treating glucocorticoid resistance observed in ALL.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Molecular and Cellular Endocrinology - Volume 439, 5 January 2017, Pages 431-443
نویسندگان
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