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PlexinA2 and Sema6A are required for retinal progenitor cell migration
Morgane Belle1, Aijaz Parray1, Martin Belle1
1Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Institut de la Vision, 17 rue Moreau, 75012, Paris, France.
Development, Growth & Differentiation
|June 16, 2016
Summary
Sema6A/PlexinA2 signaling is crucial for retinal progenitor cell (RPC) nuclear migration during mouse development. Disrupting this pathway blocks RPC migration, impacting early retinal development.
Area of Science:
- Neuroscience
- Developmental Biology
- Retinal Development
Background:
- Vertebrate retinal progenitor cells (RPCs) generate diverse neural and glial cell types.
- RPCs exhibit interkinetic nuclear migration (INM) along the apico-basal axis within the neuroblastic layer.
- Cell cycle exit and differentiation occur at the apical side of the neuroblastic layer.
Purpose of the Study:
- To investigate the role of Sema6A/PlexinA2 signaling in early retinal development.
- To determine the function of Sema6A/PlexinA2 in retinal progenitor cell proliferation and migration.
Main Methods:
- Analysis of embryonic retinas from Sema6A and PlexinA2 knockout mice.
- Time-lapse videomicroscopy to observe retinal progenitor cell behavior.
- Examination of interkinetic nuclear migration patterns.
Main Results:
- Sema6A/PlexinA2 signaling is essential for the interkinetic nuclear migration of RPCs.
- Disruption of Sema6A/PlexinA2 signaling leads to blocked RPC nuclear migration at the apical side.
- This study provides the first evidence for transmembrane molecule involvement in mouse retinal INM.
Conclusions:
- Sema6A/PlexinA2 signaling plays a critical role in regulating RPC interkinetic nuclear migration.
- This pathway is vital for normal progression of early retinal development.
- Transmembrane signaling is a key regulator of INM in the developing mouse retina.
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