title: Role of prostaglandin E2 in peptidoglycan mediated iNOS expression in mouse peritoneal macrophages in vitro.
abstract: Many extracellular stimuli, e.g. microbial products, cytokines etc., result in the expression of inducible nitric oxide synthase (iNOS) in macrophages. However, it is not known whether expression of the iNOS gene in response to microbial products is a primary response of macrophages, or is the result of paracrine/autocrine signalling induced by endogenous biomolecules that are synthesised as a result of host cell-microbe interaction. In this paper we demonstrate that iNOS expression in mouse peritoneal macrophages in response to bacterial peptidoglycan (PGN) is a secondary effect requiring autocrine signalling of endogenously produced prostaglandin E2, and that PGN stimulation is mandatory, but not sufficient in itself, for induction of iNOS expression.
authors.affiliation: School of Biotechnology, Faculty of Science, Banaras Hindu University, Varanasi, India.
authors.forename: Yogesh
authors.initials: Y
authors.lastname: Dahiya
authors.forename: Rajeev Kumar
authors.initials: RK
authors.lastname: Pandey
authors.forename: Kunal H
authors.initials: KH
authors.lastname: Bhatt
authors.forename: Ajit
authors.initials: A
authors.lastname: Sodhi
mesh_terms: D000818:Animals; D019898:Autocrine Communication / Q000187:drug effects; D001483:Base Sequence; D051546:Cyclooxygenase 2 / Q000235:genetics / Q000378:metabolism; D015232:Dinoprostone / Q000378:metabolism* / Q000494:pharmacology; D005260:Female; D015870:Gene Expression / Q000187:drug effects; D054884:Host-Pathogen Interactions; D066298:In Vitro Techniques; D017737:Macrophages, Peritoneal / Q000187:drug effects* / Q000378:metabolism*; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D052247:Nitric Oxide Synthase Type II / Q000037:antagonists & inhibitors / Q000235:genetics*; D010457:Peptidoglycan / Q000494:pharmacology*; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D034741:RNA, Small Interfering / Q000235:genetics
chemical_list: D010457:Peptidoglycan; D012333:RNA, Messenger; D034741:RNA, Small Interfering; D052247:Nitric Oxide Synthase Type II; C496317:Nos2 protein, mouse; C077623:Ptgs2 protein, mouse; D051546:Cyclooxygenase 2; D015232:Dinoprostone