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Updated: Jun 28, 2026
Quantifying Liver Size in Larval Zebrafish Using Brightfield Microscopy
Published on: February 2, 2020
Alpha2 macroglobulin-like is essential for liver development in zebrafish
1Laboratory of Molecular Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, MD, USA.
Background:
Alpha 2 Macroglobulin family members have been studied extensively with respect to their roles in physiology and human disease including innate immunity and Alzheimer's disease, but little is known about a possible role in liver development loss-of-function in model systems.
Principal Findings:
We report the isolation of the zebrafish alpha2 macroglobulin-like (A2ML) gene and its specific expression in the liver during differentiation. Morpholino-based knock-down of A2ML did not block the initial formation of the liver primordium, but inhibited liver growth and differentiation.
Significance:
This report on A2ML function in zebrafish development provides the first evidence for a specific role of an A2M family gene in liver formation during early embryogenesis in a vertebrate.
Insights
The alpha-2 macroglobulin-like (A2ML) gene is crucial for zebrafish liver development. Knocking down A2ML inhibits liver growth and differentiation, highlighting its role in embryogenesis.
Area of Science:
- Developmental biology
- Genetics
- Molecular biology
Background:
- Alpha 2 Macroglobulin (A2M) family proteins are involved in immunity and diseases like Alzheimer's.
- Their role in liver development is largely unknown.
- Investigating A2M family gene function in model systems is needed.
Purpose of the Study:
- To investigate the role of an Alpha 2 Macroglobulin family gene in liver development.
- To characterize the function of the alpha2 macroglobulin-like (A2ML) gene in zebrafish.
Main Methods:
- Isolation of the zebrafish A2ML gene.
- Analysis of A2ML gene expression during liver differentiation.
- Morpholino-based knock-down of A2ML in zebrafish embryos.
Main Results:
- The zebrafish A2ML gene was isolated and found to be specifically expressed in the liver during differentiation.
- A2ML knock-down did not prevent initial liver primordium formation.
- A2ML knock-down significantly inhibited liver growth and differentiation.
Conclusions:
- This study provides the first evidence for a specific role of an A2M family gene in vertebrate liver formation.
- A2ML is essential for proper liver growth and differentiation during early embryogenesis.
