Smoking Induces Oropharyngeal Narrowing and Increases the Severity of Obstructive Sleep Apnea Syndrome (original) (raw)

Abstract

Objective:

Smoking is a known risk factor for snoring, and is reported to be associated with an increased prevalence of obstructive sleep apnea syndrome (OSAS). The purpose of this was to determine the relationship of smoking to the severity of OSAS and examine what local histological changes in the uvular mucosa of OSAS patients might influence this relationship.

Study Design and Methods:

Fifty-seven OSAS subjects were included and classified according to smoking history and OSAS severity. Twenty-eight subjects were heavy smokers and 29 were nonsmokers; these 57 patients were divided according to moderate or severe OSAS. Histologic changes in the uvular mucosa were evaluated in all subjects as well as smoking duration and OSAS severity.

Results:

Among smokers, moderate-to-severe OSAS was more common, and apnea, hypopnea, and oxygen desaturation indices were higher. Moreover, smoking duration and OSAS severity were significantly correlated. Increased thickness and edema of the uvular mucosa lamina propria were observed in moderate and severe OSAS patients, and only smokers had significant changes in uvular mucosa histology. Positive staining for calcitonin gene-related peptide (CGRP), a neuroinflammatory marker for peripheral nerves, was increased in the uvular mucosa of smokers.

Conclusions:

Our results suggest that smoking may worsen OSAS through exacerbation of upper airway collapse at the level of the uvula, and that histological changes of the uvular mucosa correlated with smoking might be due to increased CGRP-related neurogenic inflammation.

Citation:

Kim KS; Kim JH; Park SY; Won HR; Lee HJ; Yang HS; Kim HJ. Smoking induces oropharyngeal narrowing and increases the severity of obstructive sleep apnea syndrome. J Clin Sleep Med 2012;8(4):367–374.

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Author notes

  1. These authors contributed equally to this work

Authors and Affiliations

  1. Department of Otolaryngology and Head – Neck Surgery, Chung-Ang University, College of Medicine, Seoul, Korea
    Kyung Soo Kim M.D., Ph.D., Sung Yoon Park M.D., Ho-Ryun Won M.D., Hyun-Jin Lee M.D., Hoon Shik Yang M.D., Ph.D. & Hyun Jik Kim M.D., Ph.D.
  2. Yonsei Snoring Clinic, Seongnam, Gyeonggi-Do, Korea
    Jun Hee Kim M.D., Ph.D.

Authors

  1. Kyung Soo Kim M.D., Ph.D.
  2. Jun Hee Kim M.D., Ph.D.
  3. Sung Yoon Park M.D.
  4. Ho-Ryun Won M.D.
  5. Hyun-Jin Lee M.D.
  6. Hoon Shik Yang M.D., Ph.D.
  7. Hyun Jik Kim M.D., Ph.D.

Corresponding author

Correspondence toHyun Jik Kim M.D., Ph.D..

Additional information

Address correspondence to: Hyun Jik Kim, M.D., Ph.D., Department of Otolaryngology, Chung-Ang University College of Medicine, 224-1 Heukseok-dong, Dongjak-gu, Seoul, Korea 156-755; E-mail: hyunjk@cau.ac.kr

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Kim, K., Kim, J., Park, S. et al. Smoking Induces Oropharyngeal Narrowing and Increases the Severity of Obstructive Sleep Apnea Syndrome.J Clin Sleep Med 8, 367–374 (2012). https://doi.org/10.5664/jcsm.2024

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