Relationship between serum interleukin–1β levels and acute phase response proteins in patients with familial Mediterranean fever

INTRODUCTION The aim of this study was to investigate whether serum levels of interleukin-1beta (IL-1beta) has any possible correlation on inflammatory parameters such as C-reactive protein (CRP), erythrocyte sedimentation rate (ESR) and fibrinogen concentration in patients with familial Mediterranean fever (FMF) patients during attack-free period. MATERIALS AND METHODS The serum levels of IL-1beta, as an indicator of cytokines status, and the acute phase response proteins, CRP, ESR and fibrinogen levels were evaluated in 35 attack-free patients with FMF and 25 healthy volunteers. RESULTS Serum IL-1beta levels were significantly higher in patients with FMF than control subjects (P = 0.018). There was no statistically significant difference in the serum levels of ESR, CRP and fibrinogen between two groups (P = 0.181, P = 0.816, P = 0.686, respectively). There was a significant correlation between IL-1beta and CRP (r = 0.513, P = 0.002) values of FMF group. CONCLUSIONS In conclusion, our results confirm the presence of increased IL-1beta levels in FMF patients during attack-free period. Serum IL-1beta values seems to correlate with CRP levels. The elevation of IL-1beta levels may be important in monitoring subclinical inflammation of attack free period in FMF patients.