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Junctional adhesion molecule (JAM)-C deficient C57BL/6 mice develop a severe hydrocephalus
Lena Wyss1, Julia Schäfer, Stefan Liebner
1Theodor Kocher Institute, University of Bern, Bern, Switzerland.
Plos One
|October 3, 2012
Summary
Junctional adhesion molecule C (JAM-C) deficiency in mice causes severe hydrocephalus, impacting cerebrospinal fluid (CSF) drainage. This study highlights JAM-C
Area of Science:
- Neuroscience
- Cell Biology
- Developmental Biology
Background:
- Junctional adhesion molecule C (JAM-C) is a key regulator of cell adhesion, polarity, and inflammation.
- Its role in the central nervous system (CNS) and its specific functions in brain development and cerebrospinal fluid (CSF) homeostasis remain largely uncharacterized.
Purpose of the Study:
- To investigate the expression and function of JAM-C in the CNS.
- To determine the role of JAM-C in the development of hydrocephalus and CSF circulation.
Main Methods:
- Utilized JAM-C knockout (JAM-C(-/-)) mice on a C57BL/6 background.
- Conducted in-depth immunohistochemical analysis of JAM-C expression in CNS tissues.
- Evaluated CSF circulation and hydrocephalus phenotype in JAM-C(-/-) mice.
Main Results:
- JAM-C(-/-) mice developed severe hydrocephalus, characterized by impaired CSF drainage from the lateral to the third ventricle.
- JAM-C is expressed in vascular endothelial cells, meninges, choroid plexus, ependymal cells, and choroid plexus epithelial cells in healthy mice.
- Hydrocephalus development was not linked to vascular defects, as endothelial JAM-C re-expression did not rescue the phenotype.
Conclusions:
- JAM-C plays a critical role in maintaining CSF homeostasis and normal brain development.
- JAM-C(-/-) mice serve as a valuable model for studying hydrocephalus linked to JAM-C dysfunction, mirroring human genetic findings.
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