Cited by 55Thyroid Disorders and TreatmentsBone health and osteoporosis researchBone Metabolism and Diseases

Restoration of euthyroidism accelerates bone turnover in patients with subclinical hypothyroidism: a randomized controlled trial

Meier, Christian, Beat, M�ller, Guglielmetti, Merih, Christ-Crain, Mirjam, Staub, Jean-Jacques, Kraenzlin, Marius·2004·Osteoporosis International

Abstract

This study evaluated the effect of physiological l-thyroxine (L-T4) treatment on bone metabolism in patients with subclinical hypothyroidism. Sixty-six women with subclinical hypothyroidism (TSH 11.7 +/- 0.8 mIU/l) were randomly assigned to receive L-T4 or placebo for 48 weeks. Sixty-one of 66 patients completed the study. Individual L-T4 replacement (mean dosage 85.5 +/- 4.3 microg/day) was performed targeting euthyroid thyroid-stimulating hormone (TSH) levels. The primary outcome measure was 24- and 48-week change in markers of bone formation (total and bone alkaline phosphatase [ALP, bone ALP], osteocalcin [OC]) and resorption (pyridinoline [PYD] and deoxypyridinoline [DPD], C-terminal cross-linking telopeptide type I [CTX]). Secondary outcomes were 48-week changes in bone mineral density (BMD) of the lumbar spine and hip, measured by dual-energy X-ray absorptiometry. Compared with placebo, l-thyroxine ( n=31) resulted in significant activation of bone turnover. Overall, a significant treatment effect was observed for DPD (between-group difference 16.0%; 95%CI, 10.9 to 21.1), CTX (29.9%; 95%CI, 23.3 to 36.5), and bone ALP (13.2%; 95%CI, 6.6 to 19.7) after 24 weeks. At the end of the study, lumbar BMD in the both treatment groups differed by 1.3% (95%CI, -2.9 to 0.5) with lower levels in l-thyroxine treated women. Significant difference in BMD between groups was also observed at the trochanter. We conclude that physiological l-thyroxine treatment accelerates bone turnover reflecting early activation of bone remodeling units in the initial replacement of subclinical hypothyroidism. The observed bone loss could be interpreted as an adaptive mechanism on decreased bone turnover in preexistent hypothyroidism, and not as l-thyroxine-induced clinically important bone loss. However, long-term studies are needed to confirm this assumption.

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Crossref · 10.1007/s00198-003-1527-8

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Authors
Meier, C., Beat, M., Guglielmetti, M., Christ-Crain, M., Staub, J.-J., & Kraenzlin, M.
Affiliations
University Hospital of Basel (CH)
Corresponding author
Meier, Christian
Venue
Osteoporosis International
Published
2004-03-01
Volume
15
Issue
3
Pages
209-216
ISSN
  • 0937-941X (ISSN-L)
  • 1433-2965
OpenAlex
W1972055447
Cited by
55
References
30
Citations by year
2026: 1 · 2025: 3 · 2024: 3 · 2023: 1 · 2022: 3 · 2021: 3 · 2020: 6 · 2019: 2 · 2017: 1 · 2016: 3 · 2015: 2 · 2014: 4 · 2013: 2 · 2012: 4
FWCI
2.33
Type
journal article
Language
en
Open access
closed
Locations
  • Osteoporosis International (publishedVersion)
  • PubMed (publishedVersion)
  • reroDoc Digital Library (submittedVersion)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Thyroid Disorders and Treatments
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Bone health and osteoporosis research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bone Metabolism and Diseases
Keywords
subclinical hypothyroidism, levothyroxine, thyroid hormone replacement, bone turnover, bone metabolism, bone mineral density, bone resorption markers, bone formation markers, women, lumbar spine, hip
MeSH terms
Alkaline Phosphatase, Amino Acids, Collagen, Double-Blind Method, Female, Humans, Hypothyroidism, Lumbar Vertebrae, Middle Aged, Peptides, Thyrotropin, Thyroxine, Biomarkers, Bone Density, Osteocalcin, Bone Remodeling, Collagen Type I

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