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Examining pattern formation in mouse, chicken and frog embryos with an En-specific antiserum
C A Davis1, D P Holmyard, K J Millen
1Division of Molecular and Developmental Biology, Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Canada.
Development (Cambridge, England)
|February 1, 1991
Summary
We developed an antiserum to study En-1 and En-2 proteins in early embryos. These proteins are key markers for pattern formation in developing neural and limb tissues across species.
Area of Science:
- Developmental Biology
- Molecular Biology
- Neuroscience
Background:
- The En (Engrailed) gene family plays crucial roles in embryonic development.
- Understanding the spatial and temporal expression patterns of En proteins is vital for deciphering developmental processes.
Purpose of the Study:
- To generate a specific antiserum (alpha Enhb-1) against mouse En-2 homeodomain.
- To investigate the expression patterns of En-1 and En-2 proteins in early mouse, chick, and Xenopus embryos.
Main Methods:
- Raised an antiserum (alpha Enhb-1) targeting the mouse En-2 homeodomain.
- Utilized Western blot analysis to detect En-1 and En-2 proteins.
- Employed whole-mount immunohistochemistry and scanning electron microscopy for spatial expression analysis.
Main Results:
- The antiserum detected En-1 and En-2 proteins in mouse, chick, and Xenopus embryos.
- En protein expression was observed in the anterior neural plate (mid/hindbrain region) during early somitogenesis.
- En-1 protein localized to the ventral ectoderm of limb buds and a lateral stripe of dermatome, indicating dorsal-ventral patterning.
Conclusions:
- En expression serves as a reliable marker for pattern formation in diverse embryonic tissues.
- The findings provide insights into the establishment of dorsal-ventral polarity in limb buds and neural tissues.
- This study facilitates further experimental investigations into developmental pattern formation processes.