TGF-beta1 and HGF coordinately facilitate collagen turnover in subepithelial mesenchyme.

TGF-beta1 and HGF coordinately facilitate collagen turnover in subepithelial mesenchyme.
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TGF-β1 和 HGF 协同促进上皮下间质中的胶原蛋白周转。

DOI:
10.1016/s0006-291x(02)02192-7
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发表时间:
2002
影响因子:
3.1
通讯作者:
Hiromichi Suzuki
Hiromichi Suzuki
中科院分区:
生物学4区
文献类型:
--
作者:
Tsutomu Inoue;H. Okada;Tatsuya Kobayashi;Yusuke Watanabe;T. Kikuta;Y. Kanno;M. Takigawa;Hiromichi Suzuki

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我们采用近端肾小管上皮细胞和肾小管间质成纤维细胞共培养的方法,研究转化生长因子-β-1(转化生长因子-β-1)和肝细胞生长因子在上皮-间充质相互作用中的作用。在共培养中,转化生长因子-β-1刺激TFB产生I型胶原(Coli)。这种作用是直接的和间接的,通过共同培养的PTEC产生的结缔组织生长因子(CTGF)。联合应用转化生长因子-β-1和肝细胞生长因子可显著增加培养24小时的总大肠埃希菌产量。然而,这种联合给药在前8h促进了结缔组织生长因子的诱导,然后降低了其表达,导致α-1(I)前胶原基因在TFB中的表达在24小时内迅速下降。此外,转化生长因子-β-1与肝细胞生长因子联合应用或单独应用均可诱导血管内皮细胞中金属蛋白酶组织抑制因子-1的表达,促进大肠埃希氏菌的聚集。相反,肝细胞生长因子单独或与转化生长因子-β-1联合应用可显著增加血管内皮细胞的胶原溶解活性。因此,转化生长因子-β-1和肝细胞生长因子似乎协同调节上皮-间充质间的相互作用,促进上皮下间充质内结肠的周转。
We have employed co-culture of proximal tubular epithelial cells (PTEC) and renal tubulo-interstitial fibroblasts (TFB) to study the role of transforming growth factor-β1 (TGF-β1) and hepatocyte growth factor (HGF) in epithelial–mesenchymal interactions. In co-culture, TGF-β1 stimulated TFB to produce type I collagen (COLI). This effect was both direct and indirect, via connective tissue growth factor (CTGF) produced by the co-cultured PTEC. Co-administration of TGF-β1 and HGF significantly increased overall COLI production by TFB by 24h. However, in detail, this co-administration enhanced CTGF induction in PTEC during the first 8h, and then decreased its expression, resulting in a rapid decrease in expression of the α1(I) procollagen gene in TFB by 24h. Additionally, tissue inhibitor of metalloproteinase-1 was induced in PTEC by TGF-β1 with or without co-administration of HGF, which contributed to the COLI accumulation. In contrast, HGF alone or co-administered with TGF-β1 significantly increased collagenolytic activity derived from PTEC. Therefore, TGF-β1 and HGF seem to coordinately modulate epithelial–mesenchymal interactions to facilitate COLI turnover in subepithelial mesenchyme.
DOI: --
发表时间: 1986-02
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影响因子: --
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