scholarly journals Effects of 3 Years of Treatment with a Selective Estrogen Receptor Modulator for Postmenopausal Osteoporosis on Markers of Bone Turnover and Bone Mineral Density

2012 ◽  
Vol 24 (4) ◽  
pp. 301-308 ◽  
Author(s):  
Takashi NAGAI ◽  
Keizo SAKAMOTO ◽  
Akihiro MATSUNAGA ◽  
Koji ISHIKAWA ◽  
Emi SAITO ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Estrogen Receptor ◽  
Bone Turnover ◽  
Postmenopausal Osteoporosis ◽  
Bone Mineral ◽  
Selective Estrogen Receptor Modulator ◽  
Mineral Density ◽  
Receptor Modulator ◽  
Markers Of Bone Turnover

Impaired Estrogen Sensitivity in Bone by Inhibiting Both Estrogen Receptor a and b Pathways*

2020 ◽  
Author(s):  
Lungwani Muungo
Keyword(s):  
Bone Mineral Density ◽  
Estrogen Receptor ◽  
Bone Loss ◽  
Bone Turnover ◽  
Bone Mineral ◽  
Female Rats ◽  
Wild Type ◽  
Mineral Density ◽  
Transgenic Rats ◽  
Estrogen Sensitivity

Although it is well established that estrogen deficiencycauses osteoporosis among the postmenopausalwomen, the involvement of estrogen receptor (ER) in itspathogenesis still remains uncertain. In the presentstudy, we have generated rats harboring a dominantnegative ERa, which inhibits the actions of not only ERabut also recently identified ERb. Contrary to our expectation,the bone mineral density (BMD) of the resultingtransgenic female rats was maintained at the same levelwith that of the wild-type littermates when sham-operated.In addition, ovariectomy-induced bone loss wasobserved almost equally in both groups. Strikingly, however,the BMD of the transgenic female rats, after ovariectomized,remained decreased even if 17b-estradiol(E2) was administrated, whereas, in contrast, the decreaseof littermate BMD was completely prevented byE2. Moreover, bone histomorphometrical analysis ofovariectomized transgenic rats revealed that the higherrates of bone turnover still remained after treatmentwith E2. These results demonstrate that the preventionfrom the ovariectomy-induced bone loss by estrogen ismediated by ER pathways and that the maintenanceof BMD before ovariectomy might be compensatedby other mechanisms distinct from ERa and ERbpathways.

Bone Mineral Density and Biochemical Markers of Bone Turnover in Peri- and Postmenopausal Women

2000 ◽  
Vol 66 (4) ◽  
pp. 263-267 ◽  
Author(s):  
V. De Leo ◽  
A. Ditto ◽  
A. la Marca ◽  
D. Lanzetta ◽  
C. Massafra ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Bone Turnover ◽  
Postmenopausal Women ◽  
Bone Mineral ◽  
Biochemical Markers ◽  
Mineral Density ◽  
Markers Of Bone Turnover
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