کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10803015 | 1055762 | 2008 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
HIF-1α controls keratinocyte proliferation by up-regulating p21(WAF1/Cip1)
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کلمات کلیدی
DesferrioxamineARNTCHXP21HBSDCFDADIDSEPONACHIF-1DTTDFO2′,7′-dichlorofluorescein diacetate - 2 '، 7'-dichlorofluorescein diacetateROS - ROSerythropoietin - اریتروپویتینCell density - تراکم سلولgrowth arrest - دستگیری رشدcycloheximide - سیکلوهایسیمیدhypoxia-inducible factor 1 - عامل القایی هیپوکسی 1hypoxia-inducible factor 1α - عامل القایی هیپوکسی 1αN-acetyl cysteine - نیتستیل سیستئینKeratinocyte - کراتینوسیتReactive oxygen species - گونههای فعال اکسیژن
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: HIF-1α controls keratinocyte proliferation by up-regulating p21(WAF1/Cip1) HIF-1α controls keratinocyte proliferation by up-regulating p21(WAF1/Cip1)](/preview/png/10803015.png)
چکیده انگلیسی
The cyclin-dependent kinase inhibitor p21WAF1/Cip1 plays a central role in a spatial and temporal balance of epidermal keratinocyte proliferation and growth arrest. However, what controls p21 expression in keratinocytes remains uncertain. Hypoxia-inducible factor 1α (HIF-1α) does not only express a variety of genes essential for hypoxic adaptation, but also up-regulates p21 so as to slow down cell cycle under hypoxic conditions. In the present study, we examined the role of HIF-1α in p21-mediated growth arrest of keratinocyte. Keratinocyte proliferation was arrested in the G1 phase at a high cell density. p21 was also up-regulated in a cell density-dependent manner and was found to be highly expressed in epidermal keratinocytes of normal human skins. In addition, in the same specimens and cells, we noted robust HIF-1α expression. HIF-1α siRNAs inhibited p21 expression and released the G1 arrest. In vivo, moreover, the intradermal injection of HIF-1α siRNA attenuated p21 expression in rat epidermis and induced skin hyperplasia. Mechanistically, we propose that the production of mitochondrial reactive oxygen species and the activation of the MEK/ERK pathway are involved in the HIF-1α stabilization in keratinocytes. These results imply that HIF-1α functions as an up-stream player in the p21-mediated growth arrest of keratinocytes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochimica et Biophysica Acta (BBA) - Molecular Cell Research - Volume 1783, Issue 2, February 2008, Pages 323-333
Journal: Biochimica et Biophysica Acta (BBA) - Molecular Cell Research - Volume 1783, Issue 2, February 2008, Pages 323-333
نویسندگان
Young-Suk Cho, Jae-Moon Bae, Yang-Sook Chun, Jin-Ho Chung, Yoon-Kyung Jeon, In-San Kim, Myung-Suk Kim, Jong-Wan Park,