Hakata antigen, a new member of the ficolin/opsonin p35 family, is a novel human lectin secreted into bronchus/alveolus and bile

Mina Akaiwa, Yoshiaki Yae, Rie Sugimoto, Satoshi O. Suzuki, Toru Iwaki, Kenji Izuhara, Naotaka Hamasaki

Research output: Contribution to journalArticle

98 Citations (Scopus)

Abstract

Hakata antigen was first reported as a serum protein that reacted with an autoantibody from patients with systemic lupus erythematosus. Recently, it has been found that Hakata antigen is a new member of the ficolin/opsonin p35 family. Which iS a distinct lectin family, on the basis of homology of structures and the common characteristic of possessing lectin activity. In this study we analyzed the tissue distribution of Hakata antigen. Hakata antigen mRNA and protein were generated in the lung and liver. In the lung, Hakata antigen was produced by both ciliated bronchial epithelial cells and Type II alveolar epithelial cells and was secreted into the bronchus and alveolus. In the liver, Hakata antigen was produced by bile duct epithelial cells and hepatocytes and was also secreted into the bile duct. These results demonstrate that Hakata antigen is a unique lectin protein that exists not only in serum but also in bronchus/alveolus and bile, and indicate that Hakata antigen plays a role in bronchus/alveolus and bile under physiological conditions.

Original languageEnglish
Pages (from-to)777-785
Number of pages9
JournalJournal of Histochemistry and Cytochemistry
Volume47
Issue number6
DOIs
Publication statusPublished - Jun 1999

All Science Journal Classification (ASJC) codes

  • Anatomy
  • Histology

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