肌细胞外矩阵在静态和机械刺激培养条件下在工程肌肉组织中促进肌结蛋白表达
Lewis S Gaffney1, Matthew B Fisher1,2, Donald O Freytes1
1Joint Department of Biomedical Engineering, North Carolina State University, University of North Carolina at Chapel Hill, Raleigh, NC 27695, USA.
Journal of tissue engineering and regenerative medicine
|April 14, 2025
概括
这项研究开发了一种新型生物反应器中的工程肌单元. 机械刺激增加了关键蛋白质,这表明了肌结研究的更好的模型.
科学领域:
- 肌肉骨研究的研究.
- 组织工程是组织工程.
- 生物反应器技术 生物反应器技术
背景情况:
- 肌肉和肌之间的交声对肌肉骨健康至关重要,但仍未得到充分研究.
- 需要体外模型来研究肌关节 (MTJ) 功能和修复.
- 工程肌肉组织提供了一个平台,在受控条件下研究MTJ.
研究的目的:
- 在静态和动态条件下的新型生物反应器中培养工程肌肉组织.
- 评估肌突结特定蛋白质 (帕克西林和XXII型原蛋白) 的表达.
- 研究不同生物材料 (I型原和肌衍生的细胞外基质) 对蛋白质表达的影响.
主要方法:
- 在I型原体或肌衍生细胞外基质 (tECM) 水凝中培养了C2C12细胞核.
- 工程组织稳定了10天,随后进行了2-4周的循环机械刺激 (每天3小时).
- 分析了帕克西林和XXII型原蛋白的蛋白质表达.
主要成果:
- 机械刺激在2周和4周后显著增加了tECM水凝中的帕克西林表达,而不是I型原水凝.
- 肌衍生的细胞外基质水凝在机械刺激下显示了帕克西林表达的较高增加 (2周后62%;4周后31-57%).
- 类型XXII原体表达也通过水凝材料和机械刺激进行调节.
结论:
- 新型生物反应器和工程肌单元有效地模拟了肌微环境.
- 机械应变是工程组织中肌结蛋白表达的关键调节者.
- 这种模型对研究肌相互作用和MTJ形成/维护具有前景.
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