title: Prostaglandin E2-mediated dysregulation of proinflammatory cytokine production in pristane-induced lupus mice.
abstract: Systemic lupus erythematosus (SLE) is characterized by inflammatory and dysregulatory immune responses including overactive B cells, overproduction of proinflammatory cytokines, and T cell hyperactivity. PGE(2) modulates a variety of immune processes at sites of inflammation, including production of inflammatory cytokines. However, the role of PGE(2) in dysregulatory inflammatory and immune responses in lupus remains unclear. We investigated whether PGE(2) mediates production of inflammatory cytokines in pristane-induced lupus BALB/c mice. Our results showed that levels of serum and BAL PGE(2) and LPS-stimulated production of PGE(2) by peritoneal macrophages were remarkably increased in pristane-induced lupus mice compared to healthy controls. Exogenous PGE(2) enhanced production of IL-6, IL-10, and NO but decreased TNF-alpha by macrophages and augmented IFN-gamma, IL-6, and IL-10 by splenocytes from pristane-induced lupus mice compared to healthy controls. Exogenous PGE(2) also enhanced production of IFN-gamma, IL-6, and IL-10 by thymocytes from pristane-induced lupus mice. Indomethacin (Indo), a PGE(2) synthesis inhibitor, greatly inhibited LPS-induced production of IL-6 and IL-10 by macrophages from pristane-induced lupus mice, while enhanced TNF-alpha. Indo remarkably inhibited Con A-increased production of IFN-gamma, IL-6, and IL-10 by splenocytes and thymocytes from pristane-induced lupus mice. Therefore, our findings suggest that endogenous PGE(2) may mediate dysregulation of production of proinflammatory cytokines, such as IL-6, IL-10, and IFN-gamma, and NO in pristane-induced lupus mice.
authors.affiliation: College of Pharmacy, Woosuk University, Wanju, Jeonbuk, Korea. cbse@woosuk.ac.kr
authors.forename: Byeong Suk
authors.initials: BS
authors.lastname: Chae
authors.forename: Tae Yong
authors.initials: TY
authors.lastname: Shin
authors.forename: Dae Keun
authors.initials: DK
authors.lastname: Kim
authors.forename: Jae Soon
authors.initials: JS
authors.lastname: Eun
authors.forename: Jae Yoon
authors.initials: JY
authors.lastname: Leem
authors.forename: Jae Heon
authors.initials: JH
authors.lastname: Yang
mesh_terms: D000818:Animals; D001992:Bronchoalveolar Lavage Fluid / Q000737:chemistry; D002478:Cells, Cultured; D003208:Concanavalin A / Q000494:pharmacology; D016861:Cyclooxygenase Inhibitors / Q000494:pharmacology; D016207:Cytokines / Q000378:metabolism*; D015232:Dinoprostone / Q000097:blood / Q000378:metabolism*; D004195:Disease Models, Animal; D005260:Female; D007213:Indomethacin / Q000494:pharmacology; D018836:Inflammation Mediators / Q000378:metabolism*; D007371:Interferon-gamma / Q000378:metabolism; D016753:Interleukin-10 / Q000378:metabolism; D015850:Interleukin-6 / Q000378:metabolism; D008070:Lipopolysaccharides / Q000494:pharmacology; D008180:Lupus Erythematosus, Systemic / Q000139:chemically induced / Q000276:immunology / Q000378:metabolism*; D008214:Lymphocytes / Q000187:drug effects / Q000378:metabolism*; D017737:Macrophages, Peritoneal / Q000187:drug effects / Q000378:metabolism*; D051379:Mice; D008807:Mice, Inbred BALB C; D009569:Nitric Oxide / Q000378:metabolism; D013154:Spleen / Q000378:metabolism; D013729:Terpenes; D013950:Thymus Gland / Q000378:metabolism; D013997:Time Factors; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism; D015854:Up-Regulation
chemical_list: D016861:Cyclooxygenase Inhibitors; D016207:Cytokines; D018836:Inflammation Mediators; D015850:Interleukin-6; D008070:Lipopolysaccharides; D013729:Terpenes; D014409:Tumor Necrosis Factor-alpha; D003208:Concanavalin A; D016753:Interleukin-10; C009042:pristane; D009569:Nitric Oxide; D007371:Interferon-gamma; D015232:Dinoprostone; D007213:Indomethacin