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Updated: Jun 27, 2026
Microinjection of Zebrafish Embryos to Analyze Gene Function
Published on: March 9, 2009
Analysis of 14-3-3 family member function in Xenopus embryos by microinjection of antisense morpholino oligos
Jeffrey M C Lau1, Anthony J Muslin
1Center for Cardiovascular Research, Department of Medicine, Department of Cell Biology & Physiology, Washington University School of Medicine, St. Louis, MO, USA.
Abstract:
The 14-3-3 intracellular phosphoserine/threonine-binding proteins are adapter molecules that regulate signal transduction, cell cycle, nutrient sensing, apoptotic, and cytoskeletal pathways. There are seven 14-3-3 family members, encoded by separate genes, in vertebrate organisms. To evaluate the role of individual 14-3-3 proteins in vertebrate embryonic development, we utilized an antisense morpholino oligo microinjection technique in Xenopus laevis embryos. By use of this method, we showed that embryos lacking specific 14-3-3 proteins displayed unique phenotypic abnormalities. Specifically, embryos lacking 14-3-3 tau exhibited gastrulation and axial patterning defects, but embryos lacking 14-3-3 gamma exhibited eye defects without other abnormalities, and embryos lacking 14-3-3 zeta appeared completely normal. These and other results demonstrate the power and specificity of the morpholino antisense oligo microinjection technique.
Insights
Investigating 14-3-3 proteins in Xenopus embryos revealed distinct roles in development. Antisense morpholino oligo microinjection showed specific 14-3-3 proteins are crucial for embryonic patterning and organogenesis.
Area of Science:
- Molecular Biology
- Developmental Biology
- Genetics
Background:
- 14-3-3 proteins are crucial intracellular adapter molecules regulating diverse cellular pathways.
- Vertebrates possess seven distinct 14-3-3 family members, each encoded by separate genes.
- Understanding individual 14-3-3 protein functions in development is essential.
Purpose of the Study:
- To investigate the specific roles of individual 14-3-3 proteins during vertebrate embryonic development.
- To assess the utility of antisense morpholino oligo microinjection for studying gene function in Xenopus laevis.
Main Methods:
- Utilized antisense morpholino oligo microinjection in Xenopus laevis embryos.
- Generated embryos lacking specific 14-3-3 protein isoforms.
- Observed and documented phenotypic abnormalities in developing embryos.
Main Results:
- Embryos lacking 14-3-3 tau exhibited gastrulation and axial patterning defects.
- Absence of 14-3-3 gamma resulted in specific eye defects without broader abnormalities.
- Loss of 14-3-3 zeta did not cause observable developmental defects.
Conclusions:
- Individual 14-3-3 proteins play distinct and specific roles in Xenopus embryonic development.
- The morpholino antisense oligo microinjection technique is a powerful and specific tool for functional studies.
- Differential roles of 14-3-3 proteins highlight the complexity of developmental regulation.
