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Related Experiment Video

Updated: Jul 1, 2026

Imaging Calcium in Drosophila at Egg Activation

Imaging Calcium in Drosophila at Egg Activation

Published on: August 6, 2016

Calcium waves and oscillations in eggs.

C Sardet¹, F Roegiers, R Dumollard

¹Unité de Biologie Cellulaire Marine, URA 671, CNRS/UPMC, Observatoire, Station Zoologique, 06230 Villefranche-sur-Mer, France. sardet@ccrv.obs-vlfr.fr

Biophysical Chemistry

|October 13, 2006

Summary

This summary is machine-generated.

Repetitive calcium signals are observed in eggs across diverse species, including protostomes and deuterostomes. These calcium oscillations are crucial for egg development and are linked to the cell cycle and fertilization.

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In Vivo Visualization of Calcium Transients during Fertilization and Early Development in C. elegans

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Published on: July 12, 2024

Area of Science:

Developmental Biology
Cell Biology
Reproductive Biology

Background:

Eggs from various protostomes and deuterostomes exhibit repetitive calcium signals.
Calcium oscillations occur at different stages of the meiotic cell cycle, often triggered by fertilization or hormones.
These oscillations are dependent on inositol trisphosphate (InsP3) channel sensitivity and plasma membrane permeability to extracellular calcium.

Purpose of the Study:

To compare and discuss the generation of calcium signals in different eggs.
To investigate the relationship between calcium signals and the cell cycle.
To explore the potential roles of calcium signals during early development.

Main Methods:

Observation of repetitive calcium signals in eggs from protostomes (molluscs, annelids, nemerteans) and deuterostomes (mammals, ascidians).
Analysis of calcium signal initiation sites, particularly in ascidians, involving endoplasmic reticulum and mitochondria.
Comparison of calcium signal generation mechanisms across species.

Main Results:

Calcium oscillations are a common feature in eggs, lasting until the end of meiosis.
In eggs with cytoplasmic reorganization, calcium signals propagate as waves originating from localized cortical sites.
In ascidians, repetitive calcium waves initiate at a specific site containing endoplasmic reticulum and mitochondria.

Conclusions:

Calcium signaling plays a significant role in egg development across a wide range of species.
The generation and characteristics of calcium signals are conserved yet diverse, reflecting different developmental strategies.
Further research is needed to fully elucidate the precise roles of these calcium signals in embryonic development.