ABSTRACT
Objective To study the changes and significance of sCD14 in inflammatory response of patients with gouty arthritis.Methods CD14 mRNA was measured using quantitative real-time PCR in peripheral blood mononuclear cells (PBMCs).The expression of CD14 mRNA in PBMCs was compared between patients with acute gouty arthritis (AGA)(n =31)and non-acute gouty arthritis (NAGA)(n =23)and healthy controls (HC)(n =20).β-actin was selected as the internal control.The protein expressions of sCD14,IL-1βand TNF-αwere measured using enzyme linked immunosorbent assay (ELISA) in patients’ plasma.The protein expression of CRP was measured using immunoturbidimetry in patients’ plasma. Routine blood and blood biochemistry indexes were measured by routine blood analyzer and blood biochemistry analyzer of patients with AGA,NAGA and HC.We analyzed the correlation between CD14 mRNA,sCD14 protein expression and each clinical indicator.Results When compared with that in AGA group,the mRNA expression of CD14 increased significantly in PBMCs of HC patients (P < 0.05 ).When compared with that in HC and NAGA patients,the protein expression of sCD14 increased significantly in the plasma of AGA patients (P <0.01).The protein expression of sCD14 was significantly lower in the plasma of NAGA than in HC (P <0.05).The protein expression of sCD14 increased significantly in the plasma of AGA compared with HC and NAGA (P < 0.01 ).When compared with those in HC,the protein expressions of IL-1β and TNF-α increased significantly in the plasma of AGA and NAGA (P < 0.01 ).When compared with that in NAGA,the protein expression of IL-1βincreased significantly in plasma of AGA (P <0.01). The indexes of WBC increased significantly in AGA compared with HC (P <0.01),and WBC increased significantly in NAGA compared with HC (P <0.05).The indexes of GR and MO increased significantly in AGA compared with HC (P <0.05),and MO increased significantly in AGA compared with NAGA (P < 0.05 ).The indexes of UA increased significantly in AGA and NAGA compared with HC (P <0.01).There was a positive correlation between CD14 mRNA expression and IL-1β in PBMCs in AGA group (r s =0.362,P =0.045).A positive correlation was found between GR and the protein expression of sCD14 in NAGA patients’plasma (r s = 0.397,P = 0.030 ). Conclusion The dysregulated expressions of CD14 mRNA in PBMCs and sCD14 protein in GA show that sCD14 may play a significantly regulatory role in inflammatory reaction.