High Prolidase Levels in Patients with Familial Mediterranean Fever (FMF).

İntroduction: Familial Mediterranean Fever (FMF) is an autoinflammatory disease. Prolidase is a specific imidodipeptidase that plays a role in collagen degradation. Prolidase plays an important role in inflammation and wound healing. Hypoxia-inducible factor-1α (HIF-1) is an important protein in the regulation of immunological response, hemostasis, vascularization. The aim of the study was to compare serum prolidase and HIF-1α levels in patients with FMF in attack-free period and healthy control group. Methods: Between August 2017 and December 2017, sixty patients who diagnosed FMF according to the criteria of the Tel-hashomer who admitting to Sivas Cumhuriyet University Medical Faculty Internal Medicine Rheumatology Department and sixty healthy volunteers were enrolled in the study. Results: Median serum prolidase level were 72.1 (25.1-114.9) ng/ml in FMF group and 30.7 (21.3-86.2) ng/mL in healthy control (HC) group (p=0.018). ROC analysis showed that the sensitivity was 65% and the specificity was 68.3% at serum prolidase levels 54.03 ng/mL (p<0.05). The median serum levels of HIF-1α in the FMF group was 482.0(292.0-3967.0) pg/mL and 632.0(362.0-927.0) pg/mL in the HC group (p>0.05). There was no significant correlation between laboratory findings, sex, age, and prolidase (p>0.05). \Conclusion: Serum prolidase enzyme levels in FMF patients with attack-free period were significantly higher than in the HC group. However, the role of prolidase and HIF1-α in the FMF disease needs to be clarified with more extensive and comprehensive studies.