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.
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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
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发表时间:
1991
期刊:
影响因子:
4.1
通讯作者:
Jee,WS
Jee,WS
中科院分区:
医学2区
文献类型:
--
作者:
Ke,HZ;Li,XJ;Jee,WS

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本研究的目的是确定停止 PGE2 给药后 PGE2 诱导的新骨量的命运。 7 个月大的雄性 Sprague-Dawley 大鼠皮下注射 1、3 和 6 mg PGE2/kg/d,持续 60 天,然后停药 60 和 120 天。对双荧光标记的未脱钙近端胫骨标本进行组织形态计量学分析。经过 60 天的 PGE2 治疗后,与年龄匹配的对照组相比,编织骨中的小梁骨面积增加(3 和 6 mg PGE2/kg/d 时分别增加 67% 和 81%),并刺激板层骨形成,达到新的稳态,骨转换率提高,重塑周期缩短。相比之下,停药 60 和 120 天后,出现新的稳定状态,其特征是骨小梁面积减少(3 和 6 mg/kg/d 剂量的对照组的 + 40% 至 + 60%)、板层骨形成正常、对照组没有编织骨形成,并且侵蚀表面大于对照组和之前接受 60 天 PGE2 治疗的大鼠。停用PGE 2 后新骨量的减少是由于骨吸收进一步升高至PGE 2 治疗诱导的骨吸收以上以及PGE 2 刺激的骨形成活性的减少。尽管停用 PGE2 120 天后,骨小梁数量比对照组多,但我们推测骨骼对机械使用的适应最终会将骨量降低至对照水平。因此,保守的结论是,PGE2 的合成代谢作用取决于这些老年大鼠每天连续施用 PGE2。
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male Sprague-Dawley rats were given subcutaneous injections of 1, 3, and 6 mg PGE2/kg/d for 60 days and then withdrawn for 60 and 120 days.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.
通过单光子吸收法观察哺乳对大鼠股骨矿物质分布剖面的影响。
DOI: 10.1016/8756-3282(85)90319-9
发表时间: 1985
期刊: Bone
影响因子: 4.1
作者:
Hagaman,JR;Sanchez,TV;Myers,RC
通讯作者: Myers,RC
长期低剂量前列腺素E1给药。
DOI: --
发表时间: 1980
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
DOI: --
发表时间: 1983
影响因子: 4.2
作者:
T. Wronski;E. Morey
通讯作者: E. Morey
DOI: 10.1210/endo-118-2-733
发表时间: 1986-02-01
期刊: ENDOCRINOLOGY
影响因子: 4.8
作者:
GLOBUS, RK;BIKLE, DD;MOREYHOLTON, E
通讯作者: MOREYHOLTON, E
DOI: --
发表时间: 1987
期刊: Endocrinology
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