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首页> 外文期刊>Journal of Cellular Physiology >Effects of mast cells on the behavior of isolated heart fibroblasts: modulation of collagen remodeling and gene expression.
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Effects of mast cells on the behavior of isolated heart fibroblasts: modulation of collagen remodeling and gene expression.

机译:肥大细胞在孤立的行为的影响心脏成纤维细胞:调制的胶原蛋白重塑和基因表达。

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摘要

The extracellular matrix plays a critical role in the development and maintenance of the vertebrate heart. Changes in the accumulation, composition, or organization of the extracellular matrix are known to deleteriously affect heart function. Mast cells are thought to stimulate collagen expression and fibroblast proliferation accompanying fibrosis in some organs; however, the effects of mast cells on the heart interstitium are largely unexplored. The present studies were carried out to determine the effects of mast cells on isolated heart fibroblasts. Several in vitro assays were used including collagen gel contraction to examine the effects of mast cells on the function of isolated fibroblasts. Neonatal heart fibroblasts were cultured either with mast cells, mast cell-conditioned medium, or mast cell extracts, and their ability to contract collagen gels measured. Results from these experiments indicated that mast cells inhibit heart fibroblast migration and contraction of 3-dimensional collagen gels. Further experiments indicated that incubation of neonatal heart fibroblasts with extracts of mast cells altered the expression of collagen, matrix metalloproteases, and matrix receptors of the integrin family. These studies suggest that mast cells play an important role in the regulation of the cardiac interstitial matrix. Further studies are warranted to determine the mechanisms whereby mast cells modulate fibroblast activity.
机译:细胞外基质起着至关重要的作用脊椎动物的开发和维护的心。或组织的细胞外基质可影响心脏功能。肥大细胞被认为刺激胶原蛋白表达和成纤维细胞增殖伴随在某些器官纤维化;心脏肥大细胞的影响间质在很大程度上是未知的。研究进行了确定的影响孤立的心脏成纤维细胞的肥大细胞。包括几个在体外实验中被使用胶原凝胶收缩检查效果孤立的肥大细胞的功能成纤维细胞。培养与肥大细胞,肥大cell-conditioned介质或肥大细胞提取物,和他们的合同胶原凝胶的能力测量。表明,肥大细胞抑制的心成纤维细胞的迁移和收缩三维胶原凝胶。表明,新生儿心脏的孵化成纤维细胞提取物的肥大细胞改变胶原蛋白的表达,矩阵metalloproteases,矩阵的受体整合素家族。细胞的调节起着重要的作用心脏间质矩阵。合理的确定机制,肥大细胞调节成纤维细胞活动。

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