Serum antibody against granulocyte/macrophage colony-stimulating factor and KL-6 in idiopathic pulmonary alveolar proteinosis

Masayuki Nara, Kunio Sano, Hiromasa Ogawa, Tsutomu Tamada, Miyuki Nagaoka, Katsunori Okada, Mika Watanabe, Takuya Moriya, Hiroshi Miki, Koh Nakata, Masakazu Ichinose, Toshio Hattori

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Here we describe a case of idiopathic pulmonary alveolar proteinosis (I-PAP), in which anti-granulocyte/macrophage colony-stimulating factor (GM-CSF) antibody and high level of KL-6 were found in the serum. Anti-GM-CSF antibody is responsible for I-PAP, and KL-6 is a serum marker for the activity of diffuse interstitial lung disease. A 38-year-old woman, who had no symptoms, was found to have an abnormal shadow on chest radiograph 5 years previously at a health check up. Chest radiograph showed a patchy shadow in the left lower lung field. Thoracoscopic biopsy was performed because the shadow had gradually expanded during the 5 years. Histological examination revealed proteinous material filling the alveoli and positive staining by the PAS method, suggesting PAP. Anti-GM-CSF antibody and a high level of KL-6 were detected in the serum at the time of diagnosis. Three years later, the shadow disappeared spontaneously. During this period, the level of KL-6 dramatically decreased, although that of GM-CSF antibody remained unchanged. The present case suggests that the serum level of the anti-GM-CSF antibody represents a useful marker for the diagnosis but not for follow-up of the clinical course. On the contrary, KL-6 is an excellent marker for the assessment of the clinical course of I-PAP.

Original languageEnglish
Pages (from-to)349-354
Number of pages6
JournalTohoku Journal of Experimental Medicine
Volume208
Issue number4
DOIs
Publication statusPublished - 2006 Mar 24

Keywords

  • Autoimmune disease
  • GM-CSF
  • Proteinous material
  • Thoracoscopic biopsy

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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