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BMC Pulmonary Medicine
Published in: BMC Pulmonary Medicine 1/2014

Open Access 01-12-2014 | Research article

Seasonal variation of serum KL-6 concentrations is greater in patients with hypersensitivity pneumonitis

Authors: Hiroshi Ohnishi, Shintaro Miyamoto, Shigeo Kawase, Tetsuya Kubota, Akihito Yokoyama

Published in: BMC Pulmonary Medicine | Issue 1/2014

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Abstract

Background

Serum KL-6 is a useful biomarker for the diagnosis of interstitial lung diseases (ILD). However, KL-6 has not been used to discriminate different types of ILD. Serum KL-6 concentrations can vary depending on antigen exposure levels in patients with hypersensitivity pneumonitis (HP); however, seasonal changes in serum KL-6 concentrations in ILD have not been determined. We hypothesized that seasonal variation of serum KL-6 is greater in HP than for the other ILD. The aim of this study was to determine seasonal variation of serum KL-6 concentrations in various ILD.

Methods

Serum KL-6 concentrations in the summer season from June 1 to September 30 and the winter season from November 1 to February 28 were retrospectively analyzed in patients with idiopathic pulmonary fibrosis (IPF, n = 16), non-specific interstitial pneumonia (NSIP, n = 16), collagen vascular disease-associated interstitial pneumonia (CVD-IP, n = 33), house-related HP (House-HP, n = 9), bird-related HP (Bird-HP, n = 9), and combined pulmonary fibrosis and emphysema (CPFE, n = 13).

Results

Bird-HP and House-HP showed greater seasonal serum KL-6 variation than the other ILD. Serum KL-6 concentrations in Bird-HP were significantly increased in the winter and KL-6 concentrations in House-HP were significantly increased in the summer. Serum KL-6 variation was significantly greater in acute HP than chronic HP. Receiver operating characteristic curve analysis revealed that greater seasonal variation in serum KL-6 concentrations is diagnostic for Bird-HP.

Conclusion

HP should be considered in ILD with greater seasonal changes in serum KL-6 concentrations.
Appendix
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Metadata
Title
Seasonal variation of serum KL-6 concentrations is greater in patients with hypersensitivity pneumonitis
Authors
Hiroshi Ohnishi
Shintaro Miyamoto
Shigeo Kawase
Tetsuya Kubota
Akihito Yokoyama
Publication date
01-12-2014
Publisher
BioMed Central
Published in
BMC Pulmonary Medicine / Issue 1/2014
Electronic ISSN: 1471-2466
DOI
https://doi.org/10.1186/1471-2466-14-129

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