Changes in expression of Class 3 Semaphorins and their receptors during development of the rat retina and superior colliculus
| Autor: | Anil Sharma, Chrisna J. LeVaillant, Alan R. Harvey, Giles W. Plant |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Plexins
Superior Colliculi genetic structures Semaphorins Visual system Biology Retinal ganglion cells Retina Semaphorin medicine Animals Humans Neuropilins Rats Wistar Growth cone Cells Cultured Regulation of gene expression Cell adhesion molecules Superior colliculus Gene Expression Regulation Developmental SEMA3A Anatomy Collapse assay eye diseases Rats qPCR HEK293 Cells medicine.anatomical_structure Animals Newborn Retinal ganglion cell sense organs Neuroscience Research Article Developmental Biology |
| Zdroj: | BMC Developmental Biology |
| ISSN: | 1471-213X |
| Popis: | Background Members of the Semaphorin 3 family (Sema3s) influence the development of the central nervous system, and some are implicated in regulating aspects of visual system development. However, we lack information about the timing of expression of the Sema3s with respect to different developmental epochs in the mammalian visual system. In this time-course study in the rat, we document for the first time changes in the expression of RNAs for the majority of Class 3 Semaphorins (Sema3s) and their receptor components during the development of the rat retina and superior colliculus (SC). Results During retinal development, transcript levels changed for all of the Sema3s examined, as well as Nrp2, Plxna2, Plxna3, and Plxna4a. In the SC there were also changes in transcript levels for all Sema3s tested, as well as Nrp1, Nrp2, Plxna1, Plxna2, Plxna3, and Plxna4a. These changes correlate with well-established epochs, and our data suggest that the Sema3s could influence retinal ganglion cell (RGC) apoptosis, patterning and connectivity in the maturing retina and SC, and perhaps guidance of RGC and cortical axons in the SC. Functionally we found that SEMA3A, SEMA3C, SEMA3E, and SEMA3F proteins collapsed purified postnatal day 1 RGC growth cones in vitro. Significantly this is a developmental stage when RGCs are growing into and within the SC and are exposed to Sema3 ligands. Conclusion These new data describing the overall temporal regulation of Sema3 expression in the rat retina and SC provide a platform for further work characterising the functional impact of these proteins on the development and maturation of mammalian visual pathways. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink