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Recording the photopic electroretinogram from conscious adult Yucatan micropigs
S G Rosolen1, F Rigaudiere, G Saint-Macary
1Clinique Vétérinaire, Asnières, France. rosolen@club-internet.fr
Abstract:
The micropig is viewed by many as one of the best animal models of human system physiology. The purpose of this study was to develop a simple, rapid and reliable method to record clinical electroretinograms from conscious adult Yucatan micropigs. Photopic ERGs were recorded from 18 conscious animals following a 3-h period of preadaptation to a moderate photopic environment. Rectal temperature and blood pressure were monitored throughout the experiment. In order to test the reproducibility of our procedure, the same protocol was repeated (n=6 micropigs) on three different recording sessions each separated by a 48-h period. Our results indicate that the recording of reproducible ERGs, in the conscious Yucatan micropig, is feasible provided that an adequate experimental approach is used. We believe that our method will enable investigators to perform retinal physiology experiments using an approach which is compatible with that used in a human clinical setup thus facilitating the transposition of experimental data from animal to human.
Insights
Researchers developed a reproducible method for recording clinical electroretinograms (ERGs) in conscious Yucatan micropigs. This technique facilitates translating animal retinal physiology data to human clinical applications.
Area of Science:
- Veterinary Ophthalmology
- Comparative Physiology
- Animal Models
Background:
- Micropigs are valuable animal models for human physiology.
- Developing standardized methods for physiological recordings in micropigs is crucial.
- Clinical electroretinograms (ERGs) assess retinal function.
Purpose of the Study:
- To establish a simple, rapid, and reliable method for recording clinical electroretinograms (ERGs) in conscious adult Yucatan micropigs.
- To ensure the developed method is reproducible for consistent data collection.
- To facilitate the comparison of retinal physiology data between micropigs and humans.
Main Methods:
- Photopic ERGs were recorded from 18 conscious Yucatan micropigs after a 3-hour preadaptation period.
- Physiological parameters including rectal temperature and blood pressure were monitored.
- Reproducibility was assessed by repeating the protocol on 6 animals across three sessions, 48 hours apart.
Main Results:
- The study successfully demonstrated the feasibility of recording reproducible photopic ERGs in conscious Yucatan micropigs.
- The experimental approach proved reliable for consistent retinal function assessment.
- Data indicated that the method allows for consistent measurements across multiple recording sessions.
Conclusions:
- A simple, rapid, and reliable method for recording clinical electroretinograms in conscious Yucatan micropigs has been established.
- The developed protocol ensures reproducible ERG recordings, vital for research.
- This method supports the use of micropigs as a model for human retinal physiology studies, aiding data transposition.