The British Journal of Rheumatology, Vol 37, 653-658, Copyright © 1998 by British Society for Rheumatology
M Suzuki, M Takahashi, S Miyamoto, H Hoshino, K Kushida, M Miura and T Inoue
The effects of menopause and disease activity on bone metabolism in
rheumatoid arthritis (RA) were studied by using biochemical markers of bone
metabolism. We measured osteocalcin, bone-specific alkaline phosphatase,
urinary total pyridinoline and deoxypyridinoline, and urinary free
deoxypyridinoline in 78 female patients with RA (39 pre- menopause, Pre-RA;
39 post-menopause, Post-RA) and 54 female normal controls (28
pre-menopause, Pre-NC; 26 post-menopause, Post-NC). In Pre- RA, although
bone formation was equal to Pre-NC, bone resorption increased. In Post-RA,
however, bone formation was lower while bone resorption was higher than in
Post-NC. The high disease activity RA group showed higher bone turnover
than the low disease activity RA group. We conclude that menopause affects
the bone turnover in RA as well as in normal controls. In Pre-RA,
osteopenia is caused by the increase in bone resorption. In Post-RA,
osteopenia is caused by the increase in uncoupling between bone formation
and bone resorption. Furthermore, the high disease activity of RA induces
high bone turnover.
ORIGINAL PAPERS
The effects of menopausal status and disease activity on biochemical markers of bone metabolism in female patients with rheumatoid arthritis
Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Handa, Japan.
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