NDLI: Inhibition of SOCE disrupts cytokinesis in zebrafish embryos via inhibition of cleavage furrow deepening.

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Inhibition of SOCE disrupts cytokinesis in zebrafish embryos via inhibition of cleavage furrow deepening.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Chan, Ching M. Chen, Yiyun Hung, Tin S. Miller, Andrew L. Shipley, Alan M. Webb, Sarah E.
Description	Author Affiliation: Chan CM ( Division of Life Science and State Key Laboratory of Molecular Neuroscience, HKUST, Clear Water Bay, Hong Kong, PRC.)
Abstract	During the first few cell division cycles in zebrafish, distinct Ca(2+) transients are localized to the early embryonic cleavage furrows, where they accompany (and are required for) furrow positioning, propagation, deepening and apposition. It has previously been shown that the endoplasmic reticulum (ER) acts as the primary store for generating these Ca(2+) transients via release through inositol 1,4,5-trisphosphate receptors (IP 3Rs). We hypothesised that maintaining the elevated levels of intracellular Ca(2+) required for deepening and apposition of the cleavage furrows in these large eggs might result in the depletion of the available ER Ca(2+) store, thus the role of store-operated Ca(2+) entry (SOCE) was examined. Newly fertilized, dechorionated embryos were incubated with various SOCE inhibitors, starting just prior to the onset of the first cell division cycle. The effect of these inhibitors on mitosis, furrow positioning, propagation, deepening and apposition, and the generation of the cytokinetic Ca(2+) transients was determined. Treatment with 2-APB or SKF 96365 had no major effect on mitosis, furrow positioning or propagation, but inhibited furrow deepening resulting in regression of the cleavage furrow. Both of these inhibitors also blocked the furrowing Ca(2+) transient, with SKF 96365 having a more profound inhibitory effect than 2-APB. In zebrafish, SOCE does not appear to be required for mitosis or the early stages of cytokinesis during the early embryonic cell division cycles, but it does appear to be essential for maintaining the elevated levels of [Ca(2+)]i for the extended periods that are required during furrow deepening and daughter cell apposition.
File Format	HTM / HTML
ISSN	02146282
e-ISSN	16963547
Journal	The International Journal of Developmental Biology
Issue Number	7-9
Volume Number	59
Language	English
Publisher	University of the Basque Country Press
Publisher Date	2015-01-01
Publisher Place	Spain
Access Restriction	Open
Subject Keyword	Discipline Embryology Discipline Biology Calcium Signaling Physiology Calcium Metabolism Cleavage Stage, Ovum Cytokinesis Embryo, Nonmammalian Animals Boron Compounds Pharmacology Calcium Channel Blockers Drug Effects Endoplasmic Reticulum Imidazoles Inositol 1,4,5-trisphosphate Receptors Zebrafish Embryology Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Developmental Biology Embryology

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