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The expression of plexins during mouse embryogenesis
Nina M Perälä1, Tiina Immonen, Hannu Sariola
1Developmental Biology, Institute of Biomedicine, Biomedicum Helsinki, University of Helsinki, Haartmaninkatu 8, P.O. Box 63, FIN-00014, Finland.
Gene Expression Patterns : GEP
|January 22, 2005
Summary
Plexins are crucial receptors involved in development. This study reveals their widespread expression in various non-neuronal tissues during embryonic development, particularly in the kidney, tooth, and testis.
Area of Science:
- Developmental Biology
- Molecular Biology
- Cell Biology
Background:
- Plexins are large transmembrane proteins acting as semaphorin receptors.
- Their roles in non-neuronal tissues are not well understood, despite known functions in lung and cardiac development.
- Nine mouse plexin subtypes (Plexin-A1-4, -B1-3, -C1, -D1) have been identified.
Purpose of the Study:
- To extensively survey the expression patterns of specific plexins (Plxna1-a4, Plxnb1-b3, Plxnc1) in embryonic mouse tissues.
- To investigate plexin expression during the development of the kidney, tooth, and testis.
Main Methods:
- Non-radioactive in situ hybridization was employed to detect plexin mRNA expression.
- Expression patterns were analyzed in E14 mouse embryos and during the development of specific organs.
Main Results:
- Most studied plexins (Plxna1-a4, Plxnb1-b2, Plxnc1) showed wide expression in both neuronal and non-neuronal tissues at E14.
- Plxnb3 expression was undetectable at E14.
- Specific plexin expression patterns were observed in developing kidney (Plxnb1, Plxnb2), tooth (Plxna1, Plxnb1, Plxnb2), and testis (Plxna1, Plxnb1, Plxnc1).
Conclusions:
- Plexins are broadly expressed in embryonic mouse tissues, including non-neuronal sites.
- Distinct and specific expression patterns of plexins during organogenesis suggest crucial roles in non-neuronal development.