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Published on: February 19, 2016
Patterns of free calcium in zebrafish embryos
R Créton1, J E Speksnijder, L F Jaffe
1Marine Biological Laboratory, Woods Hole, MA 02543, USA. r.creton@mbl.edu
Journal of Cell Science
|May 28, 1998
Summary
Calcium (Ca2+) patterns are crucial for early vertebrate development and later stages like gastrulation and organogenesis. Disrupting Ca2+ signaling severely impairs embryonic development in zebrafish.
Area of Science:
- Developmental Biology
- Cellular Biology
- Biochemistry
Background:
- Calcium (Ca2+) signaling is known to regulate early vertebrate development, including fertilization and cell division.
- Its roles in later developmental stages remain less understood.
Purpose of the Study:
- To investigate the dynamic patterns of Ca2+ during the first day of zebrafish development.
- To explore novel functions of Ca2+ in cellular differentiation and pattern formation.
Main Methods:
- Injection of the Ca2+ indicator aequorin into zebrafish eggs.
- Imaging Ca2+ dynamics throughout the first 24 hours of development.
- Experimental manipulation of Ca2+ levels using BAPTA buffer.
Main Results:
- Observed Ca2+ waves and pulses during early cleavage stages.
- Identified Ca2+ patterns associated with gastrulation, neural induction, and organogenesis (brain, somites, heart, otic placode).
- Demonstrated that blocking Ca2+ signaling arrests development and leads to severe malformations (reduced eyes and hearts).
Conclusions:
- Ca2+ plays critical roles beyond early development, influencing cell movements, differentiation, and pattern formation.
- Specific Ca2+ boundaries, like the one between presumptive forebrain and hindbrain, are vital for regionalization.
- This study provides a comprehensive overview of Ca2+ dynamics in early vertebrate development.
