Partial loss of anabolic effect of prostaglandin E2 on bone after its withdrawal in rats.
Partial loss of anabolic effect of prostaglandin E2 on bone after its withdrawal in rats.
复制标题
大鼠停药后,前列腺素 E2 对骨的合成代谢作用部分丧失。
DOI:
10.1016/8756-3282(91)90040-p
复制
发表时间:
1991
期刊:
影响因子:
4.1
通讯作者:
Jee,WS
中科院分区:
文献类型:
--
作者:
Ke,HZ;Li,XJ;Jee,WS
The object of this study was to determine the fate of PGE2-induced new bone mass after withdrawal of PGE2administration. Seven-month-old male Sprague-Dawley rats were given subcutaneous injections of 1, 3, and 6 mg PGE2/kg/d for 60 days and then withdrawn for 60 and 120 days. Histomorphometric analyses were performed on double fluorescent labeled undecalcified proximal tibial bone specimens. After 60 days of PGE2treatment, a new steady state of increased trabecular bone area (+ 67% and + 81% with 3 and 6 mg PGE2/kg/d) from woven bone and stimlated lamellar bone formation, elevated bone turnover, and shortened remodeling periods were achieved compared to age-matched controls. In contrast, after 60 and 120 days withdrawal of PGE2, a new steady state characterized by less trabecular bone area (+ 40% to + 60% of controls with 3 and 6 mg/kg/d doses), normal lamellar bone formation, no woven bone formation from controls, and eroded surface greater than those seen in controls and previously in 60-day PGE2 treated rats. The decrease in new bone mass after withdrawal of PGE2was due to a further elevation of bone resorption above that induced by the PGE2treatment and a reduction in PGE2stimulated bone formation activities. Although there is more trabecular bone than in controls after 120 days' withdrawal of PGE2, we postulate that the skeletal adaptation to mechanical usage will eventually reduce the bone mass to control levels. Thus, it is conservative to conclude that the anabolic effect of PGE2was dependent upon continuous daily administration of PGE2in these older rats.
登录
查看更多内容
影响因子:
4.1
作者:
Hagaman,JR;Sanchez,TV;Myers,RC
通讯作者:
Myers,RC
影响因子:
3.3
作者:
K. Sone;M. Tashiro;T. Fujinaga;T. Tomomasa;K. Tokuyama;T. Kuroume
通讯作者:
T. Kuroume
影响因子:
4.2
作者:
T. Wronski;E. Morey
通讯作者:
E. Morey
影响因子:
4.8
作者:
GLOBUS, RK;BIKLE, DD;MOREYHOLTON, E
通讯作者:
MOREYHOLTON, E
影响因子:
4.8
作者:
D. Bikle;B. Halloran;C. M. Cone;R. Globus;E. Morey
通讯作者:
E. Morey