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Clinical Rheumatology

, Volume 31, Issue 8, pp 1231–1238 | Cite as

Serum leptin levels are associated with the presence of syndesmophytes in male patients with ankylosing spondylitis

  • Ki-Jo Kim
  • Ji-Young Kim
  • Su-Jung Park
  • Hosung Yoon
  • Chong-Hyeon Yoon
  • Wan-Uk Kim
  • Chul-Soo Cho
Original Article

Abstract

The aim of this study is to clarify the association between serum leptin levels and the presence of syndesmophytes in male patients with ankylosing spondylitis (AS). Seventy-two male patients with AS and 20 age-matched healthy male controls were included. Patients were stratified by the presence of syndesmophytes. Serum leptin levels were measured and adjusted for body mass index (BMI). In addition, bone-specific alkaline phosphatase (BALP), osteocalcin, and telopeptide of type I collagen were determined. Patients with syndesmophytes were associated with older age (p < 0.001), longer disease duration (p = 0.003), and higher BMI (p = 0.038). Serum leptin levels and leptin per BMI (leptin/BMI) ratio were not different between AS patients and healthy controls. However, serum leptin/BMI ratio was significantly higher in patients with syndesmophytes compared to those without (p = 0.010). In multivariate analysis, higher serum leptin/BMI ratio remained significantly associated with the presence of syndesmophytes (p = 0.029). Moreover, serum leptin/BMI ratio was positively correlated with serum BALP (γ = 0.279, p = 0.039). However, there was no significant association between serum leptin/BMI ratio and bone mineral density. Serum leptin levels are elevated in male AS patients with syndesmophytes and were found to be correlated with bone formation marker, suggesting a potential role of leptin in new bone formation in AS.

Keywords

Ankylosing spondylitis Leptin Syndesmophyte 

Notes

Acknowledgments

This work was supported by grants from the Korea Healthcare technology R&D Project, the Ministry for Health, Welfare and Family Affairs (no. A092258), and the National Research Foundation (NRF) funded by the Ministry of Education, Science and Technology (R33-2008-000-10064-0 and 2009-0080087).

Disclosures

None.

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Copyright information

© Clinical Rheumatology 2012

Authors and Affiliations

  • Ki-Jo Kim
    • 1
  • Ji-Young Kim
    • 1
  • Su-Jung Park
    • 1
  • Hosung Yoon
    • 1
  • Chong-Hyeon Yoon
    • 1
  • Wan-Uk Kim
    • 1
  • Chul-Soo Cho
    • 1
    • 2
  1. 1.Division of Rheumatology, Department of Internal Medicine, College of MedicineThe Catholic University of KoreaSeoulRepublic of Korea
  2. 2.Division of Rheumatology, Department of Internal Medicine, Yeouido St. Mary’s HospitalThe Catholic University of KoreaSeoulRepublic of Korea

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