Osteoporosis International

, Volume 19, Issue 8, pp 1185–1192 | Cite as

Link between obstructive sleep apnea and increased bone resorption in men

  • H. Tomiyama
  • R. Okazaki
  • D. Inoue
  • H. Ochiai
  • K. Shiina
  • Y. Takata
  • H. Hashimoto
  • A. Yamashina
Original Article

Abstract

Summary

The bone metabolic abnormalities in patients with obstructive sleep apnea (OSA) were examined. Severity-dependent increases in the serum/urinary levels of bone resorption markers and their attenuation following continuous positive airway pressure therapy in subjects with OSA provide the first evidence of a link between OSA and abnormal bone metabolism.

Introduction

Hypoxia, microinflammation and oxidative stress, well-known pathophysiological features of obstructive sleep apnea (OSA), are also known to affect bone metabolism. We examined the bone metabolic abnormalities in patients with OSA and also the effects of continuous positive airway pressure (CPAP) therapy on these abnormalities.

Methods

A cross-sectional and prospective study was conducted in 50 consecutive male subjects visiting a sleep clinic and 15 age-matched control subjects without OSA. Plasma concentrations of IL-1β, IL-6, TNF-alfa, 3-nitrotyrosine, osteocalcin, bone-specific alkaline phosphatase (BAP), and urinary concentrations of cross-linked C-terminal telopeptide of type I collagen (CTX) were examined before and after 3 months’ CPAP in subjects with OSA.

Results

The plasma levels of the cytokines as well as the urinary CTX levels were higher in subjects with severe OSA than in those with mild OSA or control subjects. Significant decrease of the urinary excretion of CTX (before: 211 ± 107 vs. after: 128 ± 59 μg/mmol/creatinine; p < 0.01) as well as of the plasma levels of the cytokines was observed following 3 months’ CPAP.

Conclusions

Severity-dependent increases in the serum/urinary levels of bone resorption markers and their reversal following CPAP in subjects with OSA provide the first evidence of a link between OSA and abnormal bone metabolism.

Keywords

Bone metabolic markers Hypoxia Osteopenia Sleep apnea 

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Copyright information

© International Osteoporosis Foundation and National Osteoporosis Foundation 2008

Authors and Affiliations

  • H. Tomiyama
    • 1
  • R. Okazaki
    • 2
  • D. Inoue
    • 2
  • H. Ochiai
    • 2
  • K. Shiina
    • 1
  • Y. Takata
    • 1
  • H. Hashimoto
    • 3
  • A. Yamashina
    • 1
  1. 1.Second Department of Internal MedicineTokyo Medical UniversityShinjuku-kuJapan
  2. 2.Third Department of Internal MedicineTeikyo University Chiba Medical CenterTokyo Japan
  3. 3.Health Management and PolicyUniversity of Tokyo Graduate School of MedicineTokyoJapan

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