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星鱼蛋中的细胞表面的机械性质

Soichi Nakamura¹, Y Hiramoto¹

¹Biological Laboratory, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152, Japan.

Development, growth & differentiation

|June 7, 2023

概括

海蛋细胞表面刚度在成熟过程中发生变化. 在不成熟和成熟的卵中,弹性值大约是表面力的5倍.

科学领域:

细胞生物学细胞生物学
生物物理学的生物物理.
发育生物学是发展生物学.

背景情况:

细胞表面的机械特性对于理解细胞过程至关重要.
海星卵细胞在成熟过程中经历了显著的形态和机械变化.

研究的目的:

为了研究不同成熟阶段的海星卵细胞表面的机械特性.
在卵细胞成熟过程中量化表面力和弹性之间的关系.

主要方法:

使用细胞弹性计,通过微管管对海星蛋表面施加受控负压.
测量细胞表面变形 (凸起) 作为应用于负压的反应.
从压力-变形关系计算了表面力和弹性值.

主要成果:

细胞表面变形和施加的负压之间的关系在胚芽囊卵细胞和成熟卵子中几乎是线性的.
在两个卵细胞阶段,弹性值始终是表面力的大约5倍.
观察到细胞表面刚度的降低,在1 - 甲基氨酸诱导后发生生殖囊泡分解之前.
在第一个和第二个极体的形成过程中,观察到过渡性的硬度增加.

结论:

海蛋表面的机械特性,特别是刚性和弹性,在成熟过程中动态变化.
机械性质的这些变化与特定的发育事件相关,例如生殖囊泡的分解和极体的形成.

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