Light-induced CREB phosphorylation and gene expression in rat retinal cells.
The signal pathway for light-induced expression of c-fos and the neuropeptide somatostatin (SS) in rat retinal cells was investigated. Flashing light induced c-fos and SS mRNA in the inner nuclear layer and the ganglion cell layer. As both c-fos and SS genes have a cyclic AMP response element (CRE) in their promoters, CRE-binding protein (CREB) phosphorylation in retinal cells was examined with a phospho-CREB-specific antibody. Both flashing light and administration of the L-type Ca2+ channel activator Bay K 8644 induced phosphorylation of CREB in the nuclei of the amacrine cells and the ganglion cells where c-fos/SS mRNAs were expressed. These cells could be double-stained with anti-calmodulin kinase II (anti-CaM kinase II) monoclonal antibody and phospho-CREB-specific polyclonal antiserum after Bay K 8644 administration, indicating the colocalization of phosphorylated CREB at Ser133 and CaM kinase II in the neural retina.
Yoshida
K
K
Department of Ophthalmology, Hokkaido University School of Medicine, Sapporo, Japan.
Imaki
J
J
Matsuda
H
H
Hagiwara
M
M
D001498:3-Pyridinecarboxylic acid, 1,4-dihydro-2,6-dimethyl-5-nitro-4-(2-(trifluoromethyl)phenyl)-, Methyl ester / Q000494:pharmacology; D000818:Animals; D002118:Calcium / Q000378:metabolism; D017871:Calcium-Calmodulin-Dependent Protein Kinases / Q000378:metabolism; D017362:Cyclic AMP Response Element-Binding Protein / Q000235:genetics* / Q000378:metabolism*; D015870:Gene Expression / Q000528:radiation effects*; D008027:Light; D008297:Male; D010766:Phosphorylation / Q000528:radiation effects; D016760:Proto-Oncogene Proteins c-fos / Q000235:genetics; D012333:RNA, Messenger / Q000378:metabolism; D051381:Rats; D011916:Rats, Inbred F344; D012160:Retina / Q000166:cytology / Q000502:physiology* / Q000528:radiation effects*; D013004:Somatostatin / Q000235:genetics; D014018:Tissue Distribution
D017362:Cyclic AMP Response Element-Binding Protein; D016760:Proto-Oncogene Proteins c-fos; D012333:RNA, Messenger; D013004:Somatostatin; D001498:3-Pyridinecarboxylic acid, 1,4-dihydro-2,6-dimethyl-5-nitro-4-(2-(trifluoromethyl)phenyl)-, Methyl ester; D017871:Calcium-Calmodulin-Dependent Protein Kinases; D002118:Calcium