Effects of long-term cigarette smoke exposure on bone metabolism, structure, and quality in a mouse model of emphysema

Mamoru Sasaki, Shotaro Chubachi, Naofumi Kameyama, Minako Sato, Mizuha Haraguchi, Masaki Miyazaki, Saeko Takahashi, Takayoshi Nakano, Yukiko Kuroda, Tomoko Betsuyaku, Koichi Matsuo

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Abstract

Smoking is a common risk factor for both chronic obstructive pulmonary disease (COPD) and osteoporosis. In patients with COPD, severe emphysema is a risk factor for vertebral fracture; however, the effects of smoking or emphysema on bone health remain largely unknown. We report bone deterioration in a mouse model of emphysema induced by nose-only cigarette smoke (CS) exposure. Unexpectedly, short-term exposure for 4-weeks decreased bone turnover and increased bone volume in mice. However, prolonged exposure for 20- and 40-weeks reversed the effects from suppression to promotion of bone resorption. This long-term CS exposure increased osteoclast number and impaired bone growth, while it increased bone volume. Strikingly, long-term CS exposure deteriorated bone quality of the lumbar vertebrae as illustrated by disorientation of collagen fibers and the biological apatite c-axis. This animal model may provide a better understanding of the mechanisms underlying the deterioration of bone quality in pulmonary emphysema caused by smoking.

Original languageEnglish
Article numbere0191611
JournalPLoS One
Volume13
Issue number1
DOIs
Publication statusPublished - 2018 Jan 1

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ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

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