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Related Experiment Video

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Visualizing Ocular Morphogenesis by Lightsheet Microscopy Using rx3:GFP Transgenic Zebrafish

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Abnormal retinal development in Cloche mutant zebrafish.

Susov Dhakal^1,2, Craig B Stevens¹, Meyrav Sebbagh³

¹Department of Biological Sciences, University of Idaho, Moscow, ID USA.

Developmental Dynamics : an Official Publication of the American Association of Anatomists

|August 19, 2015

Summary

This summary is machine-generated.

The early ocular vasculature is crucial for neural retina development in zebrafish embryos. Its absence leads to disorganized retinas, independent of oxygen supply, highlighting a developmental patterning role.

Keywords:

Müller glia neurod1 neurogenesis pax6a photoreceptors retina vasculature zebrafish

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Published on: July 19, 2010

Area of Science:

Developmental Biology
Neuroscience
Ophthalmology

Background:

In vitro and in vivo studies suggest embryonic vasculature regulates central nervous system development.
Previous research used manipulations causing extra ocular vessels to study vasculature roles.
Zebrafish cloche-/- (clo-/-) mutants provide an avascular model to study ocular vasculature in vivo.

Purpose of the Study:

To identify the necessary developmental functions of the ocular vasculature in regulating neural retina development and patterning.
To investigate the role of the vasculature in neural retina development using an avascular zebrafish model.
To understand the in vivo functions of the ocular vasculature in neural retina formation.

Main Methods:

Utilized avascular zebrafish cloche-/- (clo-/-) embryos.
Observed retinal development, cell proliferation, survival, and differentiation.
Analyzed retinal cell types, transcription factor expression, and glial morphology.
Investigated the role of p53-mediated cell death and hypoxia markers.

Main Results:

clo-/- embryos exhibited absent early ocular vasculature and microphthalmia.
Retinas showed reduced cell proliferation, survival, and disorganized structures.
Mutants displayed mispatterned transcription factors, abnormal Müller glia, and reduced cell differentiation.
p53 inhibition did not fully rescue the phenotype, revealing ectopic cones.

Conclusions:

The early ocular vasculature plays a critical role in neural and glial developmental patterning of the retina.
This vascular role in retinal patterning is independent of its gas exchange function.
Ocular vasculature is essential for proper neural retina development in vivo.