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Bone Turnover Markers and Estradiol Level in Postmenopausal Women

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Published/Copyright: June 1, 2005
Clinical Chemistry and Laboratory Medicine (CCLM)
From the journal Volume 38 Issue 11

Abstract

It has been found recently that women with estradiol (E) levels < 5 pg/ml were more likely to suffer osteoporotic fractures. We evaluated the relationships between biomarkers of bone turnover and changes in hormone levels in early or late postmenopausal women without any replacement therapy. Follicle stimulating hormone (FSH), luteinizing hormones (LH), estradiol and serum resorption (crosslaps) and formation (osteocalcin) markers were assayed. Bone densities in the spine and femoral neck were also measured.

Elevated FSH, LH and decreased estradiol in postmenopausal women were accompanied by higher osteocalcin (9.1–9.7 ng/ml) and crosslaps level (3305–3458 pmol/l) compared to premenopausal women (6.8 ng/ml and 2087 pmol/l). Bone density was lower in elderly women. A significant inverse correlation was found between estradiol and crosslaps level; FSH and LH were also correlated with bone markers. Estradiol levels < 9 pg/ml were associated with increased bone resorption, decreased hip bone density and higher frequency of osteopenia and osteoporosis. Over 57% of women with an estradiol < 9 pg/ml could be identified as having “a high turnover” compared with 30% with estradiol above 9 pg/ml. Our results indicate that changes in bone density may not be very clear but an increase in bone turnover is distinctly apparent in women with severe estradiol deficiency.

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Published Online: 2005-06-01
Published in Print: 2000-11-12

Copyright © 2000 by Walter de Gruyter GmbH & Co. KG

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