title: Pattern-recognition receptor signaling regulator mRNA expression in humans and mice, and in transient inflammation or progressive fibrosis.
abstract: The cell type-, organ-, and species-specific expression of the pattern-recognition receptors (PRRs) are well described but little is known about the respective expression profiles of their negative regulators. We therefore determined the mRNA expression levels of A20, CYLD, DUBA, ST2, CD180, SIGIRR, TANK, SOCS1, SOCS3, SHIP, IRAK-M, DOK1, DOK2, SHP1, SHP2, TOLLIP, IRF4, SIKE, NLRX1, ERBIN, CENTB1, and Clec4a2 in human and mouse solid organs. Humans and mice displayed significant differences between their respective mRNA expression patterns of these factors. Additionally, we characterized their expression profiles in mononuclear blood cells upon bacterial endotoxin, which showed a consistent induction of A20, SOCS3, IRAK-M, and Clec4a2 in human and murine cells. Furthermore, we studied the expression pattern in transient kidney ischemia-reperfusion injury versus post-ischemic atrophy and fibrosis in mice. A20, CD180, ST2, SOCS1, SOCS3, SHIP, IRAK-M, DOK1, DOK2, IRF4, CENTB1, and Clec4a2 were all induced, albeit at different times of injury and repair. Progressive fibrosis was associated with a persistent induction of these factors. Thus, the organ- and species-specific expression patterns need to be considered in the design and interpretation of studies related to PRR-mediated innate immunity, which seems to be involved in tissue injury, tissue regeneration and in progressive tissue scarring.
authors.affiliation: Medical Clinic and Policlinic IV, Nephrology Center, University of Munich, 80336 Munich, Germany. roman.guenthner@med.uni-muenchen.de
authors.forename: Roman
authors.initials: R
authors.lastname: Günthner
authors.forename: Vankayala Ramaiah Santhosh
authors.initials: VR
authors.lastname: Kumar
authors.forename: Georg
authors.initials: G
authors.lastname: Lorenz
authors.forename: Hans-Joachim
authors.initials: HJ
authors.lastname: Anders
authors.forename: Maciej
authors.initials: M
authors.lastname: Lech
mesh_terms: D000818:Animals; D005355:Fibrosis / Q000235:genetics*; D006801:Humans; D007249:Inflammation / Q000235:genetics*; D051379:Mice; D008810:Mice, Inbred C57BL; D012333:RNA, Messenger / Q000235:genetics
chemical_list: D012333:RNA, Messenger