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心跳细胞:利用培养心肌细胞研究细胞结构和收缩能力在实验室练习中
Stephen E Asmus1, Collin K Wells1, Hanna M Montalvo1
1Biology and Biochemistry & Molecular Biology Programs, Centre College, Danville, Kentucky, USA.
概括
商业上可用的心肌细胞 (心肌细胞) 为研究细胞收缩性和细胞骨架提供了很好的模型. 这些细胞可以在本科实验室中使用,以探索细胞骨组织和信号分子对收缩率的影响.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 身体生理学 身体生理学
背景情况:
- 心肌细胞表现出内在的收缩性,这是对心脏功能至关重要的基本特性.
- 研究细胞骨和细胞收缩性是本科生细胞和分子生物学中的关键话题.
- 哺乳动物心肌细胞很容易获得,并且可以在体外培养.
研究的目的:
- 为本科生建立实践实验室练习,研究心肌细胞收缩性和细胞骨组织.
- 展示使用心肌细胞作为基本细胞生物学概念的模型系统.
- 研究信号分子对心肌细胞收缩率的影响.
主要方法:
- 胚胎大鼠心肌细胞在细胞培养皿或玻璃盖片上进行培养.
- 细胞使用逆相对比和光显微镜可视化.
- 心肌细胞被固定和三重染色以可视化活性丝,微管和细胞核.
- 在用上腺素治疗前和治疗后测量了收缩率.
主要成果:
- 培养的心肌细胞在几周内表现出持续的自发收缩.
- 光显微镜揭示了细胞内高度组织的actin和微管网络.
- 在特定度范围内,上腺素治疗显著增加了心肌细胞收缩的速度.
- 实验设置允许使用相同的细胞培养物进行多个实验室会议.
结论:
- 商用心肌细胞作为本科生细胞和分子生物学实验室的有效和适应性模型.
- 这些练习提供了标准细胞培养,显微镜和实验设计的实践经验.
- 学生可以直接观察和量化细胞收缩性和细胞骨动态.
- 这项研究强调了信号分子对心肌细胞功能的生理影响.
相关概念视频
Structure of Cardiac Muscles
Cardiac muscle, or myocardium, is a specialized type of muscle found exclusively in the heart. Its unique structural and functional characteristics enable the heart to perform its vital role of pumping blood throughout the body continuously and rhythmically. The cardiac muscle cells, or cardiomyocytes, possess an endomysium and perimysium but do not have an epimysium.
Compared to skeletal muscles, cardiac muscle cells are small and mostly have a single nucleus. Additionally, they are usually...
Compared to skeletal muscles, cardiac muscle cells are small and mostly have a single nucleus. Additionally, they are usually...
Specialized Characteristics of Cardiac Muscles
The primary role of cardiac muscles is to propel blood throughout the cardiovascular system. The cardiac muscle cells, or cardiomyocytes, exhibit specialized characteristics that allow them to perform this function.
Cardiac muscle cells are smaller than skeletal muscles, averaging 10–20 mm in diameter and 50–100 mm in length. However, they have large energy demands for continuous contraction and relaxation. This energy is almost exclusively derived from aerobic metabolism of energy reserves in...
Cardiac muscle cells are smaller than skeletal muscles, averaging 10–20 mm in diameter and 50–100 mm in length. However, they have large energy demands for continuous contraction and relaxation. This energy is almost exclusively derived from aerobic metabolism of energy reserves in...

