在受精海胆卵的第一个细胞周期有丝分裂时，细胞内Na⁺和Cl⁻的浓度会波动，但K⁺或Mg²⁺的浓度不会波动。

Fluctuation in the intracellular concentration of Na+ and Cl- but not of K+ or Mg2+ at mitosis of the first cell cycle in fertilized sea urchin eggs.

作者信息

Cameron I L, Hunter K E, Smith N K

机构信息

Department of Cellular and Structural Biology, University of Texas Health Science Center, San Antonio 78284.

出版信息

Cell Biol Int Rep. 1988 Nov;12(11):951-8. doi: 10.1016/0309-1651(88)90163-4.

DOI:10.1016/0309-1651(88)90163-4

PMID:3228863

Abstract

This report concerns changes in the cytoplasmic concentration of Na+, Cl-, K+ and Mg2+ during the first cell cycle and into the second cell cycle of fertilized sea urchin eggs of Lytechinus variegatus. The results of electron probe x-ray microanalysis showed a significant equimolar decrease in Na+ and Cl- at the first cell division which was followed by a significant increase early in the second cell cycle. Neither K+ nor Mg2+ showed such significant changes. The loss of a large fraction of the Na+ ions from the egg at metaphase was not accompanied by a significant egg volume change. The observed pattern of ionic change was related to several previously reported chemical and metabolic changes at cell division in sea urchin eggs.

摘要

本报告涉及在多斑刺海胆受精卵的第一个细胞周期以及进入第二个细胞周期期间，细胞质中Na⁺、Cl⁻、K⁺和Mg²⁺浓度的变化。电子探针X射线微分析结果显示，在第一次细胞分裂时，Na⁺和Cl⁻显著等摩尔减少，随后在第二个细胞周期早期显著增加。K⁺和Mg²⁺均未显示出如此显著的变化。在中期，卵中大部分Na⁺离子的流失并未伴随卵体积的显著变化。观察到的离子变化模式与先前报道的海胆卵细胞分裂时的几种化学和代谢变化有关。