Changes in serum levels of type I collagen-related proteins after surgically induced menopause and correlations with bone loss in the lumbar spine.

Abstract:

:The purpose of this prospective study was to characterize the changes in serum levels of two proteins produced during the synthesis and degradation of type I collagen, i.e., the carboxyterminal propeptide of type I procollagen (PICP) and the pyridinoline cross-linked carboxyterminal telopeptide of type I collagen (ICTP), respectively, after oophorectomy, and to assess the degree of correlation between changes in the serum values of these proteins and changes in bone mineral density (BMD) of the lumbar spine. Serum levels of PICP, ICTP and bone gla protein (BGP) were determined in 18 women before oophorectomy (baseline) and at 7 days, and 1, 2, 3, 6, 9 and 12 months post-oophorectomy (PO). The BMD of the lumbar spine was measured at baseline, and at 6 months and 12 months PO. ICTP had increased significantly at 7 days PO and peaked between 1 and 3 months PO. PICP and BGP had increased significantly at 2 months PO and remained at high levels thereafter. The percent changes in lumbar BMD from baseline values (% CFB) at 6 months and at 12 months PO were significantly correlated with % CFB in ICTP, but not with % CFB in PICP or BGP. Accordingly, bone resorption is a main determinant of bone mineral loss after oophorectomy and the change in recently-developed bone resorption markers, such as ICTP, is of clinical utility in predicting a degree of subsequent bone loss after surgical menopause.

journal_name

Endocr J

journal_title

Endocrine journal

authors

Yasumizu T,Fukada Y,Hoshi K

doi

10.1507/endocrj.46.337

subject

Has Abstract

pub_date

1999-04-01 00:00:00

pages

337-43

issue

2

eissn

0918-8959

issn

1348-4540

journal_volume

46

pub_type

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