Amino acid transport in the retina |
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Authors: | Federico Piccoli Rosa Guarneri Francesco Ponte Vincenzo Bonavita |
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Affiliation: | (1) Departments of Neurology and Ophthalmology, University of Palermo, Italy;(2) Department of Neurology, University of Naples, Italy |
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Abstract: | The uptake, exit, homoexchange, inhibitory pattern, and kinetic analysis of transport of three amino acids were studied in the isolated retina of adult rat under different metabolic conditions. Only in the case of glycine, uptake and exit were shown to duplicate the processes observed in brain slices. In the case of lysine, glucose and oxygen showed an inhibitory effect, but with glutamate spontaneous exit could not be measured. It was also found that the rate of homoexchange for glycine and glutamate, but not for lysine, increases in the presence of oxygen and glucose. |
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