title: The expression of the inducible nitric oxide synthase messenger RNA on monocytes in severe acute pancreatitis.
abstract: OBJECTIVE
  Although there have been numerous studies that nitric oxide (NO) is produced in monocytes and macrophages in animal models, it still remains controversial whether NO is produced by human monocytes and macrophages. To clarify whether NO is produced by human monocytes in patients with systemic inflammatory response syndrome (SIRS), we examined the expression of inducible nitric oxide synthase (iNOS) messenger RNA (mRNA) and constitutive nitric oxide synthase (cNOS) mRNA in cultured monocytes derived from severe acute pancreatitis patients complicated with SIRS.
  
  
  METHODS
  Monocytes were harvested from peripheral blood of nine severe acute pancreatitis patients with SIRS (group S) and five mild acute pancreatitis patients with no SIRS (group M). Then we examined the expression of iNOS mRNA and cNOS mRNA in cultured monocytes using the reverse transcription PCR (RT-PCR) method.
  
  
  RESULTS
  iNOS mRNA was expressed in the cultured monocytes derived from eight of the nine patients in group S, but not in any of the five patients in group M, while cNOS mRNA was not found in cultured monocytes derived from any patient in either group.
  
  
  CONCLUSIONS
  Although it is still not clear whether NO is produced in human monocytes or not, these findings indicate that iNOS is induced in monocytes in severe acute pancreatitis patients with SIRS, but not in mild pancreatitis patients.
authors.affiliation: Department of Emergency and Critical Care Medicine Nihon University School of Medicine, 30-1 Ohyaguchi Kamimachi Itabashi-ku, Tokyo 173-8610, Japan. k.tanjoh@jcom.home.ne.jp
authors.forename: Katsuhisa
authors.initials: K
authors.lastname: Tanjoh
authors.forename: Ryouichi
authors.initials: R
authors.lastname: Tomita
authors.forename: Toru
authors.initials: T
authors.lastname: Izumi
authors.forename: Kosaku
authors.initials: K
authors.lastname: Kinoshita
authors.forename: Yayoi
authors.initials: Y
authors.lastname: Kawahara
authors.forename: Takashi
authors.initials: T
authors.lastname: Moriya
authors.forename: Akira
authors.initials: A
authors.lastname: Utagawa
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D002478:Cells, Cultured; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009000:Monocytes / Q000201:enzymology; D009569:Nitric Oxide / Q000096:biosynthesis*; D052248:Nitric Oxide Synthase Type I / Q000235:genetics; D052247:Nitric Oxide Synthase Type II / Q000235:genetics*; D010195:Pancreatitis / Q000201:enzymology*; D012333:RNA, Messenger / Q000032:analysis* / Q000378:metabolism; D018746:Systemic Inflammatory Response Syndrome / Q000201:enzymology*
chemical_list: D012333:RNA, Messenger; D009569:Nitric Oxide; D052248:Nitric Oxide Synthase Type I; D052247:Nitric Oxide Synthase Type II