Analysis of pathomechanism of androgenetic alopecia by investigating TGF-β1 promoter
TGF-β1启动子研究分析雄激素性脱发的发病机制
基本信息
- 批准号:16591098
- 负责人:
- 金额:$ 2.3万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2004
- 资助国家:日本
- 起止时间:2004 至 2005
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
We reported that TGF-β1 is up-regulated by androgen in dermal papilla cells (DPCs) from androgenetic alopecia (AGA) using our coculture system of DPCs transiently transfected with androgen receptor (AR) expression vector and keratinocytes (KCs). This finding suggested that the regulation of TGF-β1 by androgen is a key step in the pathogenesis of AGA. To examine the possible regulatory mechanism of TGF-β1 gene expression by androgen, we analysed TGF-β1 promoter activity of the pTGF-β1-Luc vector, which was constructed by connecting the 5' upstream region of the TGF-β1 gene (-1362 bp upstream from the transcription start site) to the luciferase reporter gene. When pTGF-β1-Luc and AR expression vector were cotransfected in DPCs from AGA, R1881 increased luciferase activity to around 10-fold. In contrast, this induction did not occur in CV-1 cells and transformed DPCs. Thus the regulation of promoter activity by androgen may be cell-specific. From analysis of deleted pTGF-β1-Luc vector using DPCs from AGA, there are two possible regulatory regions (-1131〜-731 and -459〜 -323) and two negative regulatory regions (-1326〜-1127 and -735〜-459). We found two AP-1 binding sites in the region at -459〜-323. Using the reporter vector containing the mutation at these two AP-1 sites, we found that these sites are involved in the suppression of TGF-β1 promoter and that AR can release this suppression.
我们利用我们的雄激素受体(AR)表达载体瞬时转染毛乳头细胞(DPC)与角质形成细胞(KCs)共培养体系,研究雄激素对雄激素性脱发毛乳头细胞(DPC)转化生长因子-β1的上调作用。提示雄激素对转化生长因子-β-1的调节是其发病机制中的关键步骤。为了探讨雄激素对转化生长因子-β1基因表达的可能调控机制,我们分析了转化生长因子-β1-LUC载体的启动子活性,该载体是通过将转化生长因子-β1基因的5‘上游区(转录起始点上游-1362bp)连接到荧光素酶报告基因构建而成的。将pTGFI1Luc和AR表达载体共转染AGA来源的DPC,R1881可使β荧光素酶活性提高约10倍。相反,这种诱导不发生在CV-1细胞和转化的DPC中。因此,雄激素对启动子活性的调节可能是细胞特异性的。用AGA中缺失的DPC分析缺失的β载体,发现可能存在两个调控区域(-1131~-731和-459~-323)和两个负调控区域(-1326~-1127和-735~-459)。我们在-459~-323区域发现了两个AP-1结合位点。利用含有这两个AP-1位点突变的报告载体,我们发现这两个位点参与了对转化生长因子-β-1启动子的抑制,AR可以释放这种抑制。
项目成果
期刊论文数量(30)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Hair Growth Stimulation by Ruta graveolens L.
芸香刺激毛发生长。
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:Tetsuya Moriue;Yasuo Kubota;Junsuke Igarashi;Ayumi Adachi et al.;Tabata H et al.
- 通讯作者:Tabata H et al.
LRIG-1 provides a novel prognostic predictor in squamous cell carcinoma of the skin : an immunohistochemical analysis for 38 cases
LRIG-1为皮肤鳞状细胞癌提供了一种新的预后预测因子:38例的免疫组织化学分析
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:Abe M;et al.;Tanemura A
- 通讯作者:Tanemura A
Why do males get hair loss? : Pathomecanism of androgenetic alopecia
男性为什么会脱发?
- DOI:
- 发表时间:2006
- 期刊:
- 影响因子:0
- 作者:Fujii K;Tsuji K;Matsuura H;Okazaki F;Takahashi S;Arata J;Iwatsuki K.;Itami S et al.
- 通讯作者:Itami S et al.
Role of androgen in mesenchymal epithelial interactions in human hair follicle
- DOI:10.1111/j.1087-0024.2005.10107.x
- 发表时间:2005-12-01
- 期刊:
- 影响因子:0
- 作者:Itami, S;Inui, S
- 通讯作者:Inui, S
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INUI Shigeki其他文献
INUI Shigeki的其他文献
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{{ truncateString('INUI Shigeki', 18)}}的其他基金
Roles of a cell membrane-nuclear shuttle molecule Hic-5 in skin wound healing
细胞膜-核穿梭分子 Hic-5 在皮肤伤口愈合中的作用
- 批准号:
23592647 - 财政年份:2011
- 资助金额:
$ 2.3万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
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