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Altered Gene Expression of Muscle Satellite Cells Contributes to Agerelated Sarcopenia in Mice

机译:肌肉卫星细胞的改变基因表达有助于小鼠的剧痛

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Background: During aging, muscle tissue undergoes profound changes which lead to adecline in its functional and regenerative capacity. We utilized global gene expression analysis andgene set enrichment analysis to characterize gene expression changes in aging muscle satellite cells.Method: Gene expression data; obtained from Affymetrix Mouse Genome 430 2.0 Array, for 14mouse muscle satellite cell samples (5 young, 4 middle-aged, and 5 aged), were retrieved from publicGene Expression Omnibus repository. List of differentially expressed genes was generatedbased on 0.05 multiple-testing-adjusted p-value and 2-fold FC cut-off values. Functional profilingof genes was carried out using PANTHER Classification System.Results: We have found several differentially expressed genes in satellite cells derived from agedmice compared to young ones. The gene expression changes increased progressively with time, andthe majority of the differentially expressed genes were upregulated during aging. While the downregulatedgenes could not be correlated with specific biological processes the upregulated onescould be associated with muscle differentiation-, inflammation- or fibrosis-related processes. Thelatter two processes encompass the senescence-associated secretory phenotype for satellite cellswhich alters the tissue microenvironment and contributes to inflammation and fibrosis observed inaging muscle.Conclusion: Our analysis reveals that by altering gene expression pattern and expressing inflammatorymediators and extracellular matrix components, these cells can directly contribute to musclewasting in aged mice.
机译:背景:在衰老期间,肌肉组织经历了深刻的变化,这导致其功能和再生能力的副线。我们利用全局基因表达分析和基因设定富集分析,表征老化肌卫星细胞的基因表达变化。方法:基因表达数据;从PublicGene表达Omnibus储存中检索从Affymetrix鼠标基因组430 2.0阵列中获得的14个2.0阵列。差异表达基因列表在0.05多次测试调整后的P值和2倍FC截止值时产生。使用Panther分类系统进行功能性突发性基因。结果:与年轻人相比,我们发现衍生自刺激性的卫星细胞中的几种差异表达基因。随着时间的推移,基因表达变化逐渐增加,并且在老化期间逐渐上调了大多数差异表达基因。虽然下调不能与特定的生物学过程相关,但是上调的Oncucould与肌肉分化,炎症或纤维化相关的过程相关。 Theliter两种方法包括卫星蜂窝旋中的衰老相关的分泌表型改变了组织微环境并有助于观察到的炎症和纤维化。结论:我们的分析表明,通过改变基因表达模式并表达炎症介质和细胞外基质组分,可以直接地有助于肌肉患者在老年的老鼠中。

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