Localization of Reg receptor in rat fundic mucosa.
Reg protein has a trophic effect on gastric mucosal cells and pancreatic islets. Recently, the Reg receptor (Reg-R) has been cloned, and Reg-Reg-R interaction has been reported in the pancreas. The aim of this study was to investigate the localization of Reg-R in rat fundic mucosa. Gene expression of Reg-R was investigated with Northern blot analysis, laser capture microdissection coupled with reverse transcription-polymerase chain reaction, and in situ hybridization in the fundic mucosa, and the types of cells expressing this gene were determined. Reg-R mRNA expression was detected mainly in chief cells and parietal cells of the deep layers and faintly in surface epithelial cells and mucous neck cells of the proliferating zone. Our results suggest that regenerating protein may act not only as a regulator of gastric epithelial cell proliferation but also as a modifier of other multiple physiologic functions.
Kazumori
Hideaki
H
Second Department of Internal Medicine, Shimane Medical UniversityIzumo, Japan.
Ishihara
Shunji
S
Fukuda
Ryo
R
Kinoshita
Yoshikazu
Y
D000818:Animals; D015152:Blotting, Northern; D002135:Calcium-Binding Proteins / Q000502:physiology*; D003001:Cloning, Molecular; D005748:Gastric Fundus / Q000737:chemistry*; D005753:Gastric Mucosa / Q000737:chemistry*; D015870:Gene Expression; D017403:In Situ Hybridization; D007834:Lasers; D051847:Lithostathine; D008297:Male; D009419:Nerve Tissue Proteins; D012333:RNA, Messenger / Q000032:analysis / Q000235:genetics; D051381:Rats; D017208:Rats, Wistar; D020133:Reverse Transcriptase Polymerase Chain Reaction
D002135:Calcium-Binding Proteins; D051847:Lithostathine; D009419:Nerve Tissue Proteins; D012333:RNA, Messenger; C497616:Reg1a protein, rat