{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1362544420072808192.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1172/jci9441"}},{"identifier":{"@type":"URI","@value":"http://www.jci.org/articles/view/9441/files/pdf"}},{"identifier":{"@type":"PMID","@value":"10862789"}}],"dc:title":[{"@value":"Abnormal functional and morphological regulation of the gastric mucosa in histamine H2 receptor–deficient mice"}],"description":[{"notation":[{"@value":"To clarify the physiological roles of histamine H2 receptor (H2R), we have generated histamine H2R-deficient mice by gene targeting. Homozygous mutant mice were viable and fertile without apparent abnormalities and, unexpectedly, showed normal basal gastric pH. However, the H2R-deficient mice exhibited a marked hypertrophy with enlarged folds in gastric mucosa and an elevated serum gastrin level. Immunohistochemical analysis revealed increased numbers of parietal and enterochromaffin-like (ECL) cells. Despite this hypertrophy, parietal cells in mutant mice were significantly smaller than in wild-type mice and contained enlarged secretory canaliculi with a lower density of microvilli and few typical tubulovesicles in the narrow cytoplasm. Induction of gastric acid secretion by histamine or gastrin was completely abolished in the mutant mice, but carbachol still induced acid secretion. The present study clearly demonstrates that H2R-mediated signal(s) are required for cellular homeostasis of the gastric mucosa and normally formed secretory membranes in parietal cells. Moreover, impaired acid secretion due to the absence of H2R could be overcome by the signals from cholinergic receptors."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1382544420072808192","@type":"Researcher","foaf:name":[{"@value":"Takashi Kobayashi"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544420072808196","@type":"Researcher","foaf:name":[{"@value":"Shunsuke Tonai"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544420072808194","@type":"Researcher","foaf:name":[{"@value":"Yasunobu Ishihara"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544420072808193","@type":"Researcher","foaf:name":[{"@value":"Ritsuko Koga"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544420072808197","@type":"Researcher","foaf:name":[{"@value":"Susumu Okabe"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544420072808195","@type":"Researcher","foaf:name":[{"@value":"Takeshi Watanabe"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00219738"},{"@type":"PISSN","@value":"http://id.crossref.org/issn/00219738"},{"@type":"PISSN","@value":"https://id.crossref.org/issn/00219738"}],"prism:publicationName":[{"@value":"Journal of Clinical Investigation"}],"dc:publisher":[{"@value":"American Society for Clinical Investigation"}],"prism:publicationDate":"2000-06-15","prism:volume":"105","prism:number":"12","prism:startingPage":"1741","prism:endingPage":"1749"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","url":[{"@id":"http://www.jci.org/articles/view/9441/files/pdf"}],"createdAt":"2008-02-19","modifiedAt":"2023-08-03","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Mice,%20Knockout","dc:title":"Mice, Knockout"},{"@id":"https://cir.nii.ac.jp/all?q=Reverse%20Transcriptase%20Polymerase%20Chain%20Reaction","dc:title":"Reverse Transcriptase Polymerase Chain Reaction"},{"@id":"https://cir.nii.ac.jp/all?q=Homozygote","dc:title":"Homozygote"},{"@id":"https://cir.nii.ac.jp/all?q=Restriction%20Mapping","dc:title":"Restriction Mapping"},{"@id":"https://cir.nii.ac.jp/all?q=DNA","dc:title":"DNA"},{"@id":"https://cir.nii.ac.jp/all?q=Hypertrophy","dc:title":"Hypertrophy"},{"@id":"https://cir.nii.ac.jp/all?q=Organ%20Size","dc:title":"Organ Size"},{"@id":"https://cir.nii.ac.jp/all?q=Gastric%20Acid","dc:title":"Gastric Acid"},{"@id":"https://cir.nii.ac.jp/all?q=Mice","dc:title":"Mice"},{"@id":"https://cir.nii.ac.jp/all?q=Fertility","dc:title":"Fertility"},{"@id":"https://cir.nii.ac.jp/all?q=Gastric%20Mucosa","dc:title":"Gastric Mucosa"},{"@id":"https://cir.nii.ac.jp/all?q=Animals","dc:title":"Animals"},{"@id":"https://cir.nii.ac.jp/all?q=Receptors,%20Histamine%20H2","dc:title":"Receptors, Histamine H2"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360002215980608512","@type":"Article","resourceType":"学術雑誌論文(journal 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