Transcriptional control of the mouse Col7a1 gene in keratinocytes: basal and transforming growth factor-beta regulated expression.
Transcriptional control of the mouse Col7a1 gene in keratinocytes: basal and transforming growth factor-beta regulated expression.
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角质形成细胞中小鼠 Col7a1 基因的转录控制:基础和转化生长因子-β 调节表达。
DOI:
10.1111/j.1523-1747.2003.12640.x
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发表时间:
2003
期刊:
影响因子:
--
通讯作者:
Klement,JohnF
中科院分区:
文献类型:
--
作者:
Naso,Michael;Uitto,Jouni;Klement,JohnF
Anchoring fibrils at the cutaneous basement membrane zone of the stratified squamous epithelia are essential to maintaining skin integrity, as absence of these structures leads to the chronic blistering disease, dystrophic epidermolysis bullosa. Type VII collagen, the major component of anchoring fibrils, is synthesized primarily by basal keratinocytes and to a lesser degree by dermal fibroblasts. To elucidate the transcriptional control elements of the type VII collagen gene (Col7a1), 3 kb of 5′ flanking sequence of the mouse gene was cloned, sequenced, and fused to the chloramphenicol acetyltransferase reporter gene. Promoter deletion analyses revealed that 560 bp of Col7a1 5′ flanking sequence was sufficient and necessary for basal level of transcription in cultured murine keratinocytes. Mutagenesis of DNA sequences with similarity to consensus binding sites for transcription factors, including Sp1/Sp3, AP2, AP1, and Smads, within the p-560 Col7a1 promoter/chloramphenicol acetyltransferase construct, coupled with DNA binding assays, revealed the importance of these sites for basal Col7a1 expression. The effect of transforming growth factor β, an activator of Col7a1 expression in keratinocytes and dermal fibroblasts, was examined using the same Col7a1 promoter/chloramphenicol acetyltransferase constructs. These analyses demonstrated that transforming growth factor β1 stimulation of Col7a1 transcription is dependent on a putative interaction between Smads and AP1. Interestingly, the Smad-like binding site was essential for both basal and transforming growth factor β1 stimulated Col7a1 transcription. Collectively, these findings attest to the complex regulation of Col7a1 transcription in epidermal keratinocytes.
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DOI:
--
发表时间:
1987
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Lunstrum,GP;Kuo,HJ;Rosenbaum,LM;Keene,DR;Glanville,RW;Sakai,LY;Burgeson,RE
通讯作者:
Burgeson,RE
DOI:
10.1111/1523-1747.ep12349019
发表时间:
1996
期刊:
The Journal of investigative dermatology
影响因子:
--
作者:
Kivirikko,S;Li,K;Christiano,AM;Uitto,J
通讯作者:
Uitto,J
影响因子:
3.9
作者:
R. Gardella;S. Barlati;N. Zoppi;G. Tadini;M. Colombi
通讯作者:
M. Colombi
DOI:
10.1073/pnas.95.25.14769
发表时间:
1998-12-08
影响因子:
11.1
作者:
Vindevoghel, L;Lechleider, RJ;Mauviel, A
通讯作者:
Mauviel, A
影响因子:
6.9
作者:
Pulkkinen, L;Uitto, J
通讯作者:
Uitto, J