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Somatostatin is altered in developing retina from ethanol-exposed rats
D M Ferriero1, R A Sheldon, J Domingo
1Department of Neurology, University of California San Francisco 94143-0870.
Neuroscience Letters
|November 23, 1992
Summary
Ethanol exposure during development increases somatostatin in the retina, leading to abnormal neuron growth and migration. This may cause optic nerve hypoplasia in fetal alcohol syndrome.
Area of Science:
- Neuroscience
- Developmental Biology
- Ophthalmology
Background:
- Optic nerve hypoplasia (ONH) is a common birth defect in fetal alcohol syndrome (FAS).
- Retinal ganglion cell (RGC) development is crucial for optic nerve formation.
- Somatostatin is a neuropeptide implicated in neuronal development.
Purpose of the Study:
- To investigate the impact of in vivo ethanol exposure on somatostatin expression in the developing retina.
- To explore the relationship between ethanol-induced somatostatin changes and RGC development defects.
Main Methods:
- In vivo exposure of developing animals to ethanol.
- Measurement of somatostatin concentration in retinal tissue.
- Histological analysis of neuronal morphology and migration.
Main Results:
- Ethanol exposure significantly increased somatostatin concentration in the retina of fetuses and pups.
- Elevated somatostatin levels correlated with excessive neurite formation.
- Improper migration of somatostatin-containing neurons was observed in ethanol-exposed subjects.
Conclusions:
- Ethanol exposure disrupts normal retinal development by altering somatostatin expression.
- These disruptions in neuronal development may underlie the pathogenesis of optic nerve hypoplasia in FAS.
- Somatostatin signaling is a potential target for understanding and mitigating ethanol's effects on visual system development.