title: Presence of retina-specific proteins in the lamprey pineal complex.
abstract: The pineal complex of river lamprey reacted with the antisera raised against retina specific proteins including bovine opsin, chick visinin and frog light-sensitive cyclic GMP phosphodiesterase (PDE). Immunoreactive materials stained with anti-opsin were evenly located at the outer segment of photoreceptor cells in the pineal organ and also found in the parapineal organ. Although anti-visinin stained the pineal and parapineal photoreceptor cells, the immunopositive photoreceptor cells were observed only at the lateral portion and not at the medial portion of the pineal organ. No immunoreactive materials were found in the pineal complex by the anti-PDE, whereas the anti-PDE reacted with photoreceptor cells of the retinal tissue. The data suggest that the pineal and parapineal retinas of lamprey contain opsin- and visinin-like proteins with different distribution in their photoreceptor cell layer as found in the lamprey retinal tissue.
authors.affiliation: Department of Pharmacology, Kanazawa University, Japan.
authors.forename: C H
authors.initials: CH
authors.lastname: Kuo
authors.forename: S
authors.initials: S
authors.lastname: Tamotsu
authors.forename: Y
authors.initials: Y
authors.lastname: Morita
authors.forename: T
authors.initials: T
authors.lastname: Shinozawa
authors.forename: M
authors.initials: M
authors.lastname: Akiyama
authors.forename: N
authors.initials: N
authors.lastname: Miki
mesh_terms: D015106:3',5'-Cyclic-GMP Phosphodiesterases / Q000032:analysis*; D000818:Animals; D005136:Eye Proteins / Q000032:analysis*; D005399:Fishes / Q000378:metabolism*; D007150:Immunohistochemistry; D007798:Lampreys / Q000378:metabolism*; D009419:Nerve Tissue Proteins / Q000032:analysis*; D010870:Pineal Gland / Q000032:analysis* / Q000166:cytology; D012160:Retina / Q000032:analysis* / Q000166:cytology; D017299:Rod Opsins
chemical_list: D005136:Eye Proteins; D009419:Nerve Tissue Proteins; D017299:Rod Opsins; C045140:visinin; D015106:3',5'-Cyclic-GMP Phosphodiesterases