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首页> 外文期刊>Cell biology international. >Normal fibroblasts promote myodifferentiation of myoblasts from sex-linked dwarf chicken via up-regulation of beta1 integrin.
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Normal fibroblasts promote myodifferentiation of myoblasts from sex-linked dwarf chicken via up-regulation of beta1 integrin.

机译:正常的成纤维细胞通过上调β1整联蛋白来促进性交矮鸡的成肌细胞分化。

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摘要

Fusion of monomyoblasts to form multinucleated myotubes is a prerequisite for skeletal myogenesis, and muscle fibroblast-myoblast interaction plays an important role in the process; however, relative studies are limited. In the current study, SLD (sex-linked dwarf) chicken, a myogenic deficient model caused by GH (growth hormone)-IGF-I axis deficiency due to dw gene mutation, was introduced to study effects of fibroblasts on myodifferentiation. Using a membrane insert co-culture system, we identified that, compared with SLD fibroblasts, normal fibroblasts promoted myogenesis of primary SLD myoblasts by improving their differentiation potential in a paracrine fashion, and this effect was involved in both primary and secondary fusions. This process was also coupled with up-regulation of beta1 integrin, and reduced myogenesis, resulting from siRNA interference demonstrated that beta1 integrin was required for the response. Further, in terms of genetic discrepancy between normal and SLD fibroblasts, GH-IGF-I signalling might play a role in this paracrine control.
机译:融合成肌细胞形成多核肌管是骨骼肌发生的先决条件,而肌肉成纤维细胞与成肌细胞的相互作用在此过程中起着重要作用。但是,相关研究是有限的。在当前的研究中,引入了SLD(性交矮化)鸡,这是由dw基因突变引起的GH(生长激素)-IGF-I轴缺乏引起的成肌缺陷模型,用于研究成纤维细胞对肌分化的影响。使用膜插入共培养系统,我们确定,与SLD成纤维细胞相比,正常成纤维细胞通过旁分泌方式提高其分化潜能来促进原代SLD成肌细胞的成肌,并且这种作用与原代和继代融合有关。此过程还与beta1整合素的上调结合,并减少了由siRNA干扰引起的肌发生,这表明反应需要β1整合素。此外,就正常和SLD成纤维细胞之间的遗传差异而言,GH-IGF-1信号传导可能在这种旁分泌控制中起作用。

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