title: Effect of lipopolysaccharide (LPS) on mouse model of steroid-induced avascular necrosis in the femoral head (ANFH).
abstract: Avascular necrosis of the femoral head (ANFH) is commonly observed in patients treated with excessive glucocorticoid (GC). Single administration of lipopolysaccharide (LPS) has shown to induce immune stimulatory factors. However, the effect of repeated administration of LPS on GC-induced ANFH has not been studied. Thus, the purpose of this study was (i) to examine the cytokine profile induced by repeated LPS administrations and (ii) to test the effect of repeated LPS treatments on GC-induced ANFH. A mouse necrosis model of ANFH was designed by chronic GC administration with co-treatment of LPS. Mice body weights in the LPS/prednisolone (PDN) co-treated group were lower than that of the untreated control group, but spleen weights were greater than the control group. The levels of IL-6, TNFα, and IL-33 in the liver and spleen of the LPS/PDN group were lower than the untreated control group, whereas TNFα level in the femoral head of the LPS/PDN group increased. Collectively, the effect of repeated LPS on the pathogenesis of GC-induced ANFH was associated with the TNFα level in the femoral head, but the pathogenesis did not correspond to cytokine levels in immune tissues.
authors.affiliation: Laboratory of Cytokine Immunology, Department Biomedical Sciences and Technology, Konkuk University, Seoul, 143-701, Republic of Korea.
authors.forename: Soyoon
authors.initials: S
authors.lastname: Ryoo
authors.forename: Sukha
authors.initials: S
authors.lastname: Lee
authors.forename: Seunghyun
authors.initials: S
authors.lastname: Jo
authors.forename: Siyoung
authors.initials: S
authors.lastname: Lee
authors.forename: Areum
authors.initials: A
authors.lastname: Kwak
authors.forename: Eunsom
authors.initials: E
authors.lastname: Kim
authors.forename: Jongho
authors.initials: J
authors.lastname: Lee
authors.forename: Jaewoo
authors.initials: J
authors.lastname: Hong
authors.forename: Hyunjhung
authors.initials: H
authors.lastname: Jhun
authors.forename: Youngmin
authors.initials: Y
authors.lastname: Lee
authors.forename: Anshul Shyam
authors.initials: AS
authors.lastname: Sobti
authors.forename: Soohyun
authors.initials: S
authors.lastname: Kim
authors.forename: Kwang-Jun
authors.initials: KJ
authors.lastname: Oh
mesh_terms: D000818:Animals; D001835:Body Weight; D001842:Bone and Bones / Q000473:pathology; D016207:Cytokines / Q000032:analysis; D004195:Disease Models, Animal; D005269:Femur / Q000473:pathology*; D005271:Femur Head Necrosis / Q000139:chemically induced* / Q000473:pathology*; D008070:Lipopolysaccharides / Q000276:immunology* / Q000633:toxicity*; D008099:Liver / Q000473:pathology; D051379:Mice; D013154:Spleen / Q000473:pathology; D013256:Steroids / Q000008:administration & dosage / Q000009:adverse effects*
chemical_list: D016207:Cytokines; D008070:Lipopolysaccharides; D013256:Steroids