title: Histamine H4 receptor expression in human synovial cells obtained from patients suffering from rheumatoid arthritis.
abstract: While histamine H4 receptor (H4R) has been implicated in immune system disturbances in different organ tissues, the presence and possible roles of H4R in synovial cells (SC) of rheumatoid arthritis (RA) patients has not previously been documented. This study conclusively evidences H4R expression in SC of RA patients by use of RT-PCR method. As RA consists mainly of immunological disturbances in SC of RA patients, this study's findings document a novel histamine action site, and opens potential new avenues to investigate mechanisms and to develop pharmacotherapeutic agents for the disease.
authors.affiliation: Department of Geriatric Pharmacology & Therapeutics, Graduate School of Pharmaceutical Sciences, Chiba University; Chiba 260-8675, Japan.
authors.forename: Yoshiko
authors.initials: Y
authors.lastname: Ikawa
authors.forename: Masahiko
authors.initials: M
authors.lastname: Suzuki
authors.forename: Satoshi
authors.initials: S
authors.lastname: Shiono
authors.forename: Emi
authors.initials: E
authors.lastname: Ohki
authors.forename: Hideshige
authors.initials: H
authors.lastname: Moriya
authors.forename: Etsuko
authors.initials: E
authors.lastname: Negishi
authors.forename: Koichi
authors.initials: K
authors.lastname: Ueno
mesh_terms: D001172:Arthritis, Rheumatoid / Q000378:metabolism* / Q000473:pathology; D001483:Base Sequence; D017931:DNA Primers; D004587:Electrophoresis, Agar Gel; D006801:Humans; D012333:RNA, Messenger / Q000235:genetics; D043562:Receptors, G-Protein-Coupled / Q000235:genetics / Q000378:metabolism*; D011968:Receptors, Histamine / Q000235:genetics / Q000378:metabolism*; D000074040:Receptors, Histamine H4; D013583:Synovial Membrane / Q000378:metabolism* / Q000473:pathology
chemical_list: D017931:DNA Primers; C418607:HRH4 protein, human; D012333:RNA, Messenger; D043562:Receptors, G-Protein-Coupled; D011968:Receptors, Histamine; D000074040:Receptors, Histamine H4