An essential role of cytosolic phospholipase A2alpha in prostaglandin E2-mediated bone resorption associated with inflammation.
An essential role of cytosolic phospholipase A2alpha in prostaglandin E2-mediated bone resorption associated with inflammation.
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胞质磷脂酶A2Alpha在前列腺素E2介导的骨吸收与炎症相关的骨吸收中的重要作用。
DOI:
10.1084/jem.20030015
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发表时间:
2003-05-19
影响因子:
15.3
通讯作者:
Ito, A
中科院分区:
文献类型:
--
作者:
Miyaura, C;Inada, M;Matsumoto, C;Ohshiba, T;Uozumi, N;Shimizu, T;Ito, A
Prostaglandin E (PGE)2 produced by osteoblasts acts as a potent stimulator of bone resorption. Inflammatory bone loss is accompanied by osteoclast formation induced by bone-resorbing cytokines, but the mechanism of PGE2 production and bone resorption in vivo is not fully understood. Using cytosolic phospholipase A2α (cPLA2α)-null mice, we examined the role of cPLA2α in PGE2 synthesis and bone resorption. In bone marrow cultures, interleukin (IL)-1 markedly stimulated PGE2 production and osteoclast formation in wild-type mice, but not in cPLA2α-null mice. Osteoblastic bone marrow stromal cells induced the expression of cyclooxygenase (COX)-2 and membrane-bound PGE2 synthase (mPGES) in response to IL-1 and lipopolysaccharide (LPS) to produce PGE2. Osteoblastic stromal cells collected from cPLA2α-null mice also induced the expression of COX-2 and mPGES by IL-1 and LPS, but could not produce PGE2 due to the lack of arachidonic acid release. LPS administration to wild-type mice reduced femoral bone mineral density by increased bone resorption. In cPLA2α-null mice, however, LPS-induced bone loss could not be observed at all. Here, we show that cPLA2α plays a key role in PGE production by osteoblasts and in osteoclastic bone resorption, and suggest a new approach to inflammatory bone disease by inhibiting cPLA2α.
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影响因子:
4.8
作者:
Murakami, M;Naraba, H;Kudo, I
通讯作者:
Kudo, I
DOI:
10.1073/pnas.96.13.7220
发表时间:
1999-06-22
影响因子:
11.1
作者:
Jakobsson, PJ;Thorén, S;Samuelsson, B
通讯作者:
Samuelsson, B
影响因子:
4.8
作者:
Miyaura, C;Inada, M;Suda, T
通讯作者:
Suda, T
影响因子:
64.8
作者:
Anderson, DM;Maraskovsky, E;Galibert, L
通讯作者:
Galibert, L
DOI:
10.1073/pnas.94.17.9360
发表时间:
1997-08-19
影响因子:
11.1
作者:
Miyaura, C;Onoe, Y;Suda, T
通讯作者:
Suda, T