Concerted action of androgens and mechanical strain shifts bone metabolism from high turnover into an osteoanabolic mode.
Concerted action of androgens and mechanical strain shifts bone metabolism from high turnover into an osteoanabolic mode.
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DOI:
10.1084/jem.20021017
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发表时间:
2002-11-18
期刊:
影响因子:
--
通讯作者:
Kasperk C
中科院分区:
文献类型:
--
作者:
Liegibel UM;Sommer U;Tomakidi P;Hilscher U;Van Den Heuvel L;Pirzer R;Hillmeier J;Nawroth P;Kasperk C
Adhesion of bone cells to the extracellular matrix is a crucial requirement for osteoblastic development and function. Adhesion receptors connect the extracellular matrix with the cyto-skeleton and convey matrix deformation into the cell. We tested the hypothesis that sex hormones modulate mechanoperception of human osteoblastic cells (HOB) by affecting expression of adhesion molecules like fibronectin and the fibronectin receptor. Only dihydrotestosterone (DHT), but not 17β-estradiol, stimulated fibronectin (137%) and fibronectin receptor (252%) protein expression. The effects of deformation strain on HOB metabolism were investigated in a FlexerCell® strain unit. Cyclically applied strain (2.5% elongation) increased DNA synthesis (125%) and interleukin-6 (IL-6) production (170%) without significantly affecting alkaline phosphatase (AP) activity, type I collagen (PICP), or osteoprotegerin (OPG) secretion. 10 nM DHT pretreatment abolished the mitogenic response of HOB to strain and increased AP activity (119%), PICP (163%), and OPG production (204%). In conclusion, mechanical strain stimulates bone remodeling by increasing HOB mitosis and IL-6 production. DHT enhances the osteoanabolic impact of deformation strain by increasing bone formation via increased AP activity and PICP production. At the same time, bone resorption is inhibited by decreased IL-6 and increased OPG secretion into the bone microenvironment.
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影响因子:
5.8
作者:
KASPERK, C;FITZSIMMONS, R;BAYLINK, D
通讯作者:
BAYLINK, D
影响因子:
4.2
作者:
Pettersson, U;Stålnacke, BM;Lorentzon, R
通讯作者:
Lorentzon, R
DOI:
10.1083/jcb.136.6.1385
发表时间:
1997-03-24
期刊:
The Journal of cell biology
影响因子:
--
作者:
Lin TH;Aplin AE;Shen Y;Chen Q;Schaller M;Romer L;Aukhil I;Juliano RL
通讯作者:
Juliano RL
影响因子:
2.4
作者:
Kaspar, D;Seidl, W;Claes, L
通讯作者:
Claes, L
影响因子:
4.8
作者:
Manolagas, SC;Kousteni, S
通讯作者:
Kousteni, S