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A Rat Model of Mild Intrauterine Hypoperfusion with Microcoil Stenosis
Published on: January 7, 2018
Prenatal hypoxia is associated with long-term retinal dysfunction in rats.
Stephane L Bourque1, Sharee Kuny, Laura M Reyes
1Department of Obstetrics and Gynecology, University of Alberta, Edmonton, Alberta, Canada.
Plos One
|April 24, 2013
Summary
Intra-uterine growth restriction (IUGR) in rats leads to early cone and later rod retinal dysfunction, impacting vision from young to old age. These findings highlight the long-term effects of fetal programming on retinal health.
Area of Science:
- Ophthalmology
- Developmental Biology
- Neuroscience
Background:
- Intra-uterine growth restriction (IUGR) is linked to increased susceptibility to age-related health issues.
- This study investigates if IUGR in rat models exacerbates age-related retinal dysfunction.
Purpose of the Study:
- To determine the long-term effects of IUGR on retinal function and anatomy in aging rats.
- To investigate the differential impact of IUGR on cone- and rod-driven retinal pathways.
Main Methods:
- IUGR was induced in Sprague-Dawley rats via gestational hypoxia (11.5% O2).
- Retinal function was assessed using electroretinogram (ERG) recordings at 2 and 14 months of age.
- Retinal anatomy was evaluated using immunofluorescence.
Main Results:
- Aged IUGR offspring showed significant deficits in rod-driven retinal function (a-wave, b-wave, oscillatory potentials).
- Young IUGR offspring exhibited cone-specific dysfunction (b-wave, oscillatory potentials, photopic flicker), which persisted into old age.
- Functional deficits occurred without corresponding anatomical retinal losses.
Conclusions:
- The developing retina is sensitive to prenatal stressors like hypoxia.
- Cone- and rod-driven retinal pathways have different susceptibilities to IUGR-induced dysfunction.
- Prenatal programming significantly impacts age-related retinal dystrophies, influencing diagnostic and therapeutic strategies.
