Immunocytochemical localization of taurine in the fish retina under light and dark adaptations |
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Authors: | Y Omura M Inagaki |
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Affiliation: | (1) Laboratory of Animal Information Biology, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya, Japan, JP |
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Abstract: | Summary. Previously we have observed the lack of immunoreactivity of taurine in the rod outer segments from light-adapted fish, such
as the ayu Plecoglossus altivelis and lefteye flounder Paralichthys olivaceus. This finding prompted us to investigate if there is a difference in the immunocytochemical localization of taurine in the
rod outer segments between the dark- and light-adapted states. In the retinas of the glass eel Anguilla japonica and the young goldfish Carassius auratus, extremely intense immunostaining was found in the cone outer segments, rod inner segments, photoreceptor supranuclear region
and outer plexiform layer. The rod outer segments were not immunostained in the light-adapted state, while they were intensely
immunostained in the dark-adapted state. Consequently, it was suggested that the lack of immunoreactivity in the rod outer
segment may depend on light stimulation. In addition, the conspicuous immunocytochemical localization of taurine was discussed
with the possible functional roles for taurine in the fish retina.
Received January 25, 2000/Accepted January 31, 2000 |
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Keywords: | : Amino acids – Taurine – Immunocytochemistry – Fish retina – Photoreceptor cells – Light and dark adaptations |
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