The Regulation of OPG/OCIF mRNA Epression by IL-1beta in Peripheral Blood Mononuclear Cells.
- Author:
In Gul MOON
1
;
Ho Yeon CHUNG
;
Chang Sun HWANG
;
Young Soon KANG
;
Mi Sun CHUNG
;
Han Jin OH
;
Kyu Hong CHOI
;
Sun Woo KIM
;
Eui Hyun KIM
;
Youn Yee KIM
;
Chang Hoon YIM
;
Ki VOk HAN
;
Hak Chul JANG
;
Hyun Koo YOON
;
In Kwon HAN
Author Information
1. Laboratory of Endocrinology, Department of Medicine, Sungkyunkwan University School of Medicine, Korea.
- Publication Type:Original Article
- Keywords:
Osteoprotegerin;
IL-1beta;
Peripheral blood mononuclear cells
- MeSH:
Bone and Bones;
Cell Communication;
Centrifugation;
Cytokines;
Female;
Humans;
Intercellular Signaling Peptides and Proteins;
Necrosis;
Osteoblasts;
Osteoclasts;
Osteoprotegerin;
Polymerase Chain Reaction;
RNA, Messenger*
- From:Journal of Korean Society of Endocrinology
2000;15(2):204-213
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
BACKGROUND: Osteoprotegerin(OPG) is a soluble member of the tumor necrosis factor(TNF) receptor family and inhibits osteoclastogenesis by interrupting the cell-to-cell interaction between osteoblastic/stromal cells and osteoclast progenitors. OPG is expressed in many tissues including osteoblasts and may act on bone tissues in a paracrine and/or autocrine fashion. Futhermore, many cytokines and growth factors are known to influence the regulation of OPG expression in osteoblastic/stromal cells. The aims of the present study were to examine whether or not OPG was expressed in human peripheral blood mononuclear cells(PBMCs) and to investigate the effects of IL-1beta, which were known as potent osteotropic agents, on the regulation of OPG mRNA in PBMCs. METHODS: PBMCs were isolated by centrifugation over Ficoll-Hypaque density gradients from postmenopausal women and cultured in 6-well plates containing alpha-MEM supplemented with 5% FBS. The expression of OPG mRNA in PBMCs was observed by RT-PCR in adherent and nonadherent cells on culture plates. To observe the effect of OPG expression by IL-1beta, we measured the concentration of OPG mRNA by altering the concentration and incubation time of IL-1beta. The measurement of OPG mRNA was done by semi-quantitative PCR and indicated as OPG/GAPDH. RESULTS: OPG was expressed both in cells attached to the surface of culture plates and in non-adherent cells for the incubation of peripheral blood mononuclear cells. The effect of OPG mRNA by IL-1beta tend to increase in accordance with the length of incubation time and maximizes at 12 hours of incubation time and shows 1.2-3.5 times higher than the standard level at the concentration of 0.5ng/ml. However, the increased quantity in concentration varies according to individuals.] CONCLUSION: OPG mRNA is expressed in peripheral blood mononuclear cells and known to be increased by IL-1beta.
