Notch Signaling Maintains Müller Glial Identity During Retinal Development
Author Information
Author(s): Nelson Branden R., Ueki Yumi, Reardon Sara, Karl Mike O., Georgi Sean, Hartman Byron H., Lamba Deepak A., Reh Thomas A.
Primary Institution: Department of Biological Structure, University of Washington, Seattle, Washington, United States of America
Hypothesis
Sustained Notch signaling in postmitotic Müller glia is necessary for their maturation and stabilization of glial identity.
Conclusion
The study concludes that Notch signaling is required for maintaining the Müller glial fate for almost a week after the cells have exited the mitotic cell cycle.
Supporting Evidence
- Notch signaling remains active in postmitotic Müller glia for several days after they exit the mitotic cycle.
- Inhibition of Notch signaling leads to a loss of Müller cell markers and a reacquisition of progenitor characteristics.
- Activation of Notch signaling in progenitors promotes glial gene expression.
- Microarray analysis revealed a rapid decline in genes associated with the mitotic cell cycle during the first postnatal week.
Takeaway
This study shows that a special signal called Notch helps certain eye cells called Müller glia stay as they are and not turn into other types of cells for about a week after they stop dividing.
Methodology
The researchers used FACS purification and Affymetrix cDNA microarrays to analyze gene expression in Müller glia and retinal progenitors.
Digital Object Identifier (DOI)
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