Serum level of soluble triggering receptor expressed on myeloid cells-1 as a biomarker of disease activity in relapsing polychondritis

  • Tomoo Sato
  • Yoshihisa Yamano
  • Utano Tomaru
  • Yukiko Shimizu
  • Hitoshi Ando
  • Takahiro Okazaki
  • Hiroko Nagafuchi
  • Jun Shimizu
  • Shoichi Ozaki
  • Teruomi Miyazawa
  • Kazuo Yudoh
  • Hiroshi Oka
  • Noboru Suzuki
Original Article



We aimed to identify a serum biomarker for evaluating the disease activity of relapsing polychondritis (RP).


We measured and compared serum levels of 28 biomarkers potentially associated with this disease, including soluble triggering receptor expressed on myeloid cells-1 (sTREM-1), high-sensitivity C-reactive protein (hs-CRP), and cartilage oligomeric matrix protein (COMP), in 15 RP patients and 16 healthy donors (HDs). We divided the 15 RP patients into active RP (n = 8) and inactive RP (n = 7) groups, depending on the extent of the disease, and compared candidate markers between groups. The localization of membrane-bound TREM-1 in the affected tissue was examined by immunohistochemistry.


Serum levels of sTREM-1, interferon-γ, chemokine (C–C motif) ligand 4, vascular endothelial growth factor, and matrix metalloproteinases-3 were significantly higher in RP patients than HDs. Among these markers, sTREM-1 had the highest sensitivity and specificity (86.7 and 86.7 %, respectively). Furthermore, the serum level of sTREM-1 was significantly higher in active RP patients than inactive RP patients (p = 0.0403), but this was not true for hs-CRP or COMP. TREM-1 was expressed on endothelial cells in RP lesions.


The serum level of sTREM-1 may be a useful marker of disease activity in RP.


Relapsing polychondritis Serum marker Soluble triggering receptor expressed on myeloid cells-1 



We would like to thank Katsunori Takahashi, Yasuo Kunitomo, Yuji Sato, Mikako Koike, and Yumiko Hasegawa for their excellent technical help. This study was supported by a Grant-in-Aid for Scientific Research from the Ministry of Health, Labour and Welfare, Japan.

Conflict of interest



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Copyright information

© Japan College of Rheumatology 2013

Authors and Affiliations

  • Tomoo Sato
    • 1
  • Yoshihisa Yamano
    • 1
  • Utano Tomaru
    • 2
  • Yukiko Shimizu
    • 1
  • Hitoshi Ando
    • 1
  • Takahiro Okazaki
    • 3
  • Hiroko Nagafuchi
    • 3
  • Jun Shimizu
    • 4
  • Shoichi Ozaki
    • 3
  • Teruomi Miyazawa
    • 5
  • Kazuo Yudoh
    • 1
  • Hiroshi Oka
    • 6
  • Noboru Suzuki
    • 4
  1. 1.Institute of Medical ScienceSt. Marianna University School of MedicineKawasakiJapan
  2. 2.Department of PathologyHokkaido University Graduate School of MedicineSapporoJapan
  3. 3.Division of Rheumatology and Allergy, Department of Internal MedicineSt. Marianna University School of MedicineKawasakiJapan
  4. 4.Departments of Immunology and MedicineSt. Marianna University School of MedicineKawasakiJapan
  5. 5.Division of Respiratory and Infectious Diseases, Department of Internal MedicineSt. Marianna University School of MedicineKawasakiJapan
  6. 6.Rheumatic Disease CenterTokyo Medical University Hachioji Medical CenterHachiojiJapan

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