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Published on: February 21, 2016
Altered cerebellar development in mice lacking pituitary adenylate cyclase-activating polypeptide
Aurélie Allais1, Delphine Burel, Emma R Isaac
1European Institute for Peptide Research (IFRMP 23), Laboratory of Cellular and Molecular Neuroendocrinology, University of Rouen, 76821 Mont-Saint-Aignan, France.
The European Journal of Neuroscience
|June 15, 2007
Summary
Pituitary adenylate cyclase-activating polypeptide (PACAP) is crucial for cerebellar development. PACAP-knockout mice showed delayed neuronal differentiation and increased cell death, highlighting PACAP's role in cerebellar ontogenesis.
Area of Science:
- Neuroscience
- Developmental Biology
Background:
- Pituitary adenylate cyclase-activating polypeptide (PACAP) has demonstrated trophic effects during neurodevelopment.
- PACAP and its receptors are present in the cerebellum during critical developmental periods, suggesting a key role in cerebellar ontogenesis.
Purpose of the Study:
- To investigate the role of PACAP in cerebellar cortex development.
- To compare the histogenesis of cerebellar cortex in wild-type and PACAP-knockout (PACAP-/-) mice.
Main Methods:
- Morphometric analysis of cerebellar cortex.
- Quantification of nestin and synaptophysin expression using real-time PCR and Western blot.
- Immunohistochemistry and caspase-3 activation assays.
Main Results:
- PACAP-/- mice exhibited reduced external and internal granule cell layer thickness.
- Synaptophysin expression was significantly decreased in PACAP-/- mice, indicating delayed neuronal differentiation.
- Increased caspase-3 activation was observed in PACAP-/- mice, suggesting elevated cell death.
Conclusions:
- Disruption of the PACAP gene leads to significant alterations in immature cerebellum development.
- PACAP plays a physiological role in cerebellar development by regulating neuronal differentiation and cell death.
