Abstract:Objective: To investigate the roles of interleukin-23 (IL-23) and T helper cell 17 (Th17) in brucellosis spondylitis (BS). Methods: A total of 111 patients with BS admitted to the First Hospital Affiliated to Hebei North University from January 2015 to April 2020 were selected as the research objects, including 61 patients in acute phase (acute phase group) and 50 patients in chronic phase (chronic phase group), at the same time, 120 healthy controls were selected as the control group; the serum tube agglutination test (SAT) titer, C-reactive protein (CRP), erythrocyte sedimentation rate (ESR) were detected in patients with BS before treatment; the levels of serum L-23, IL-17, tumor necrosis factor-α (TNF-α), receptor activator of NF-κB ligand (RANKL) and matrix metalloproteinase-2 (MMP-2) were detected by enzyme linked immunosorbent assay (ELISA); Th17 cells level were detected by flow cytometry; Pearson method was used to analyze the correlation between serum IL-23 and Th17, between serum IL-23, Th17 and RANKL, MMP-2 in patients with BS. Results: The proportion of patients with SAT titer≥1∶100, CRP≥5mg/L and ESR≥20mm/h in acute phase group was higher than that in chronic phase group (P<0.05); compared with those in the control group, the Th17 cells, expression levels of serum TNF-α, IL-17, IL-23, RANKL and MMP-2 were higher in chronic phase group and acute phase group (P<0.05); compared with those in chronic phase group, the Th17 cells, expression levels of serum TNF-α, IL-17, IL-23, RANKL and MMP-2 in acute phase group were significantly higher (P<0.05); the level of IL-23 in BS patients was positively correlated with Th17 cells, RANKL and MMP-2 (P<0.05), and Th17 cells was positively correlated with RANKL and MMP-2 (P<0.05). Conclusion: IL-23 and Th17 may be involved in the pathogenesis of BS. This study may provide clinical basis for the study of BS.
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