Clinical Rheumatology

, Volume 37, Issue 8, pp 2179–2186 | Cite as

A novel biomarker in patients with knee osteoarthritis: adropin

  • Gulsah GundogduEmail author
  • Koksal Gundogdu
Original Article


Adropin is newly discovered peptide hormone. Osteoarthritis (OA) is a kind of joint disease characterized by progressive joint cartilage loss and joint pain. The present study was carried out to investigate adropin and tumor necrosis factor alpha (TNF-α) levels and the relationship between adropin in patients with knee OA classified by Kellgren-Lawrence (KL). A total of 60 knee OA patients and 30 healthy controls were included in this study. KL grading was carried out using the radiographic findings. Demographic characteristics and laboratory parameters were recorded. Adropin and TNF-α levels were determined by using enzyme-linked immunosorbent assay (ELISA). Adropin level was lower in the knee OA patients compared with the healthy controls (p < 0.001), whereas TNF-α level was higher (p < 0.001). Adropin level was negatively correlated with TNF-α level, blood white blood cell (WBC) count, and neutrophil-lymphocyte ratio (NLR). However, there was a significant decrease in adropin level and an increase in TNF-α level parallel to the increase in the KL grade. In addition, serum adropin level was found to be significantly lower in KL grade 1 groups compared with healthy controls (p < 0.01). There was a decrease in adropin level parallel to the increase in the body mass index (BMI), and there was a statistically significant decrease in adropin level in knee OA patients higher than BMI > 30 (p < 0.01). Mean NLR of KL grade 4 was significantly increased compared with other grades (p < 0.05). The consequence of the present study suggested that serum adropin level could be used as a new biomarker indicating the early grade of knee OA.


Adropin Knee osteoarthritis Tumor necrosis factor alpha 


Compliance with ethical standards




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Copyright information

© International League of Associations for Rheumatology (ILAR) 2018

Authors and Affiliations

  1. 1.Department of Physiology, Faculty of MedicineAtatürk UniversityErzurumTurkey
  2. 2.Department of Orthopaedics and TraumatologyErzurum Regional Training and Research HospitalErzurumTurkey

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