BINDING AND BIOEFFECTS OF IPRIFLAVONE ON A HUMAN PREOSTEOCLASTIC CELL-LINE

被引:15
作者
BENVENUTI, S
PETILLI, M
FREDIANI, U
TANINI, A
FIORELLI, G
BIANCHI, S
BERNABEI, PA
ALBANESE, C
BRANDI, ML
机构
[1] UNIV FLORENCE,SCH MED,DEPT CLIN PHYSIOPATHOL,ENDOCRINE UNIT,I-50139 FLORENCE,ITALY
[2] UNIV FLORENCE,SCH MED,INST INTERNAL MED 3,I-50139 FLORENCE,ITALY
[3] UNIV FLORENCE,SCH MED,HAEMATOL UNIT,I-50139 FLORENCE,ITALY
关键词
D O I
10.1006/bbrc.1994.1816
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Ipriflavone, a synthetic isoflavone derivative, reduces bone resorption by inhibiting osteoclasts activity. In order to evaluate the role of Ipriflavone on osteoclast growth and differentiation we tested Ipriflavone and its four ''in vivo'' main metabolites (Metabolites I, II, III, and V) on a clonal population of human osteoclast precursor cells (FLG 29.1). Pharmacological doses of Ipriflavone and Metabolite III were able to inhibit cell proliferation and interleukin 6 release In cocultures of FLG 29.1 cells and osteoblastic (Saos-2) cells Ipriflavone at 1 mu M dose inhibited the adhesion of FLG 29.1 cells to the osteoblastic monolayer and reduced the immunocytochemical reaction of the vitronectin receptor. Binding studies with tritiated Ipriflavone showed the presence of a single specific binding site, with a Kd of about 70 nM and a binding capacity of 8 fmol/10(6) cells. These results demonstrate a direct effect of Ipriflavone and of Metabolite III on the human osteoclast precursor cell line FLG 29.1. (C) 1994 Academic Press, Inc.
引用
收藏
页码:1084 / 1089
页数:6
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