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High Resolution Whole Mount In Situ Hybridization within Zebrafish Embryos to Study Gene Expression and Function
Published on: October 19, 2013
Characterization of spatial and temporal expression pattern of Col15a1b during zebrafish development
Sandrine Bretaud1, Aurélie Pagnon-Minot, Emilie Guillon
1Institut de Biologie et Chimie des Protéines, CNRS UMR 5086, IFR 128, Université de Lyon, Université Lyon 1, 7 passage du Vercors, 69367 Lyon cedex 07, France.
Gene Expression Patterns : GEP
|November 4, 2010
Summary
Zebrafish possess a second collagen XV gene, Col15a1b, crucial for muscle and nervous system development. Its conserved structure and expression suggest a similar function to mammalian collagen XV.
Area of Science:
- Developmental Biology
- Molecular Biology
- Genetics
Background:
- Mammalian collagen XV is vital for skeletal and cardiac muscle function, with its absence causing myopathy.
- A previously identified zebrafish ortholog, Col15a1a, is expressed in notochord and impacts muscle maintenance via Shh signaling.
Purpose of the Study:
- To identify and characterize a second zebrafish collagen XV ortholog, Col15a1b.
- To investigate the conserved structure and expression pattern of Col15a1b.
- To infer the functional role of Col15a1b in zebrafish development.
Main Methods:
- Sequence analysis to determine the primary structure of Col15a1b.
- Whole mount in situ hybridization and RT-PCR to analyze gene expression patterns.
- Comparative analysis of sequence alignments and synteny with mammalian orthologs.
Main Results:
- The complete primary sequence of Col15a1b reveals conserved collagen XV structure across vertebrates.
- Col15a1b is primarily expressed in slow muscle cell lineages and nervous tissues at early stages (12hpf).
- Later expression is observed in eyes, otic placodes, and aortic arches, indicating diverse roles.
Conclusions:
- Zebrafish collagen XVb (Col15a1b) shares structural conservation with mammalian collagen XV.
- The expression pattern of Col15a1b suggests a role in muscle, nervous system, and other developing tissues.
- Unlike Col15a1a, zebrafish Col15a1b likely performs functions analogous to mammalian collagen XV.
