SMAD3 expression and regulation of fibroplasia in vocal fold injury.

SMAD3 expression and regulation of fibroplasia in vocal fold injury.
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SMAD3在声带损伤中的纤维质表达和调节。

DOI:
10.1002/lary.26648
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发表时间:
2017-09
期刊:
The Laryngoscope
影响因子:
--
通讯作者:
Branski RC
Branski RC
中科院分区:
其他
文献类型:
--
作者:
Hiwatashi N;Benedict PA;Dion GR;Bing R;Kraja I;Amin MR;Branski RC

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最近的报道强调了靶向SMAD 3的小干扰RNA(siRNA)调节声带成纤维细胞中转化生长因子β(TGF-β)介导的纤维增生的功效。目前的研究试图研究SMAD 3在体内伤口愈合过程中的表达,并量化与SMAD 3体外敲低相关的下游转录事件。在体和离体条件下建立兔单侧声带损伤模型。在损伤后1小时和1、3、7、14、30、60和90天定量SMAD 3和SMAD 7 mRNA表达。在体外,在我们的永生化人声带成纤维细胞系中,在TGF-β1刺激+/− SMAD 3敲减后的不同时间点,采用多基因分析技术。SMAD 3 mRNA表达在损伤后增加;与对照相比,在第3天和第7天上调显著(均p<0.001)。SMAD 7 mRNA在第3、7和14天也上调(分别为p=0.02、p<0.001和p<0.001)。在体外,SMAD 3敲低降低了TGF-β1刺激后6小时和24小时多种促纤维化、TGF-β信号传导和细胞外基质代谢基因的表达。累积起来,这些数据支持SMAD 3作为TGF-β介导的纤维化的潜在主调节因子。SMAD 3转录在损伤后7天达到峰值。多基因分析表明,SMAD 3敲低的治疗效果可能与调节纤维增生的下游介质和改变TGF-β信号传导有关。
Recent reports highlight the efficacy of small interfering RNA (siRNA) targeting SMAD3 to regulate transforming growth factor β (TGF-β)-mediated fibroplasia in vocal fold fibroblasts. The current study sought to investigate SMAD3 expression during wound healing in vivo and quantify the downstream transcriptional events associated with SMAD3 knockdown in vitro. In vivo and in vitro Unilateral vocal fold injury was created in a rabbit model. SMAD3 and SMAD7 mRNA expression was quantified at 1 hour and 1, 3, 7, 14, 30, 60, and 90 days following injury. In vitro, multi-gene analysis technology was employed in our immortalized human vocal fold fibroblast cell line following TGF-β1 stimulation +/− SMAD3 knockdown across time points. SMAD3 mRNA expression increased following injury; upregulation was significant at 3 and 7 days compared to control (both p<0.001). SMAD7 mRNA was also upregulated at 3, 7, and 14 days (p=0.02, p<0.001, and p<0.001, respectively). In vitro, SMAD3 knockdown reduced the expression of multiple pro-fibrotic, TGF-β signaling, and extracellular matrix metabolism genes at 6 and 24 hours following TGF-β1 stimulation. Cumulatively, these data support SMAD3 as a potential master regulator of TGF-β-mediated fibrosis. SMAD3 transcription peaked 7 days following injury. Multi-gene analysis indicated that the therapeutic effectiveness of SMAD3 knockdown may be related to regulation of downstream mediators of fibroplasia and altered TGF-β signaling.
DOI: 10.1002/lary.25673
发表时间: 2016-05
期刊: The Laryngoscope
影响因子: --
作者:
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