DOI: 10.1111/j.1440-169x.1991.00633.x. Change in Intracellular Calcium Ions upon Maturation in Starfish Oocytes

Change in Intracellular Calcium Ions upon Maturation in Starfish Oocytes

10.1111/j.1440-169x.1991.00633.x

Crossref journal-article

Wiley

Development, Growth & Differentiation (311)

Abstract

A transient increase in intracellular Ca2+ upon maturation in starfish oocyte was revealed by light emission of aequorin microinjected into the cell. One minute application of 1‐methyladenine (1‐MeAde) to a limited area of the oocyte surface was sufficient to induce the Ca2+ transient over the entire cell though it did not induce the germinal vesicle breakdown (GVBD). Ten minutes application of 1‐MeAde induced a similar Ca2+ transient followed by GVBD. Even when the transient increase of Ca2+ was inhibited by injecting EGTA into the oocyte, 1‐MeAde treatment for a long period induced GVBD. These facts indicate that the Ca2+ increase is neither necessary nor sufficient for maturation of the starfish oocyte.When the oocyte, which had been treated with 1‐MeAde for 1 min at a limited area around the animal pole, was treated again with 1‐MeAde for 10 min starting about 15 min after the first treatment, a Ca2+ transient similar to the first one was induced and was followed by GVBD. By contrast, in the oocyte treated with 1‐MeAde at an area around the vegetal pole, neither Ca2+ transient nor GVBD was induced by the second treatment with 1‐MeAde. These results indicate a difference in responsiveness to the hormone between the animal hemisphere and the vegetal hemisphere of the oocyte.

Bibliography

Kikuyama, M., & Hiramoto, Y. (1991). Change in Intracellular Calcium Ions upon Maturation in Starfish Oocytes. Development, Growth & Differentiation, 33(6), 633â638. Portico.

Authors 2

Munehiro Kikuyama (first)
Yukio Hiramoto (additional)

References 15 Referenced 9

Dates

Type	When
Created	20 years, 6 months ago (Jan. 30, 2005, 11:52 a.m.)
Deposited	1 year, 10 months ago (Oct. 22, 2023, 7 p.m.)
Indexed	2 weeks, 2 days ago (Aug. 7, 2025, 4:38 p.m.)
Issued	33 years, 8 months ago (Dec. 1, 1991)
Published	33 years, 8 months ago (Dec. 1, 1991)
Published Online	17 years, 1 month ago (July 7, 2008)
Published Print	33 years, 8 months ago (Dec. 1, 1991)

Funders 0

None

BibTeX

@article{Kikuyama_1991, title={Change in Intracellular Calcium Ions upon Maturation in Starfish Oocytes: (aequorin/calcium/oocyte maturation/1‐methyladenine/starfish)}, volume={33}, ISSN={1440-169X}, url={http://dx.doi.org/10.1111/j.1440-169x.1991.00633.x}, DOI={10.1111/j.1440-169x.1991.00633.x}, number={6}, journal={Development, Growth & Differentiation}, publisher={Wiley}, author={Kikuyama, Munehiro and Hiramoto, Yukio}, year={1991}, month=dec, pages={633–638} }

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