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  • Title: [Alteration of gamma-aminobutyric acid in streptozotocin-induced diabetic rat retina].
    Author: Kajiura Y, Inoue M, Yamamoto M, Okada Y.
    Journal: Nippon Ganka Gakkai Zasshi; 1994 May; 98(5):449-52. PubMed ID: 8197914.
    Abstract:
    To elucidate possible alteration of gamma-aminobutyric acid (GABA) in the diabetic retina, the distribution and determination of GABA was analyzed in streptozotocin-induced diabetic and normal rats after electroretinogram (ERG) recording. Immunoreactivity of GABA was found in the inner nuclear layer, inner plexiform layer, and ganglion cell layer in normal and diabetic rats. In the inner nuclear layer, strong immunoreactivity of GABA was found in amacrine-like cells. In diabetic retinas, GABA immunoreactivity was higher than in normal retinas. The contents of GABA increased began 1 week after occurrence of diabetes mellitus, attained a maximum at 2 months, and maintained this amount for 5 months. The latencies of oscillatory potentials of ERG were prolonged beginning 1 month after occurrence. These results suggest that increase of GABA in the amacrine cells of diabetic retinas may be related with the abnormality of oscillatory potentials.
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