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Serum from patients with ankylosing spondylitis can increase PPARD,fra-1, MMP7, OPG and RANKL expression in MG63 cells
Authors:Zaiying Hu  Dongfang Lin  Jun Qi  Minli Qiu  Qing Lv  Qiuxia Li  Zhiming Lin  Zetao Liao  Yunfeng Pan  Ou Jin  Yuqiong Wu  Jieruo Gu
Institution:The Third Affiliated Hospital of Sun Yat-Sen University, Department of Rheumatology, Guangzhou, China
Abstract:OBJECTIVES:To explore the effects of serum from patients with ankylosing spondylitis on the canonical Wnt/β-catenin pathway and to assess whether the serum has an osteogenic effect in MG63 cells.METHODS:MG63 cells were cultured with serum from 45 ankylosing spondylitis patients, 30 healthy controls, or 45 rheumatoid arthritis patients. The relative PPARD, fra-1, MMP7, OPG and RANKL mRNA levels were measured using quantitative real-time polymerase chain reaction. Associations between gene expression and patient demographics and clinical assessments were then analyzed.RESULTS:MG63 cells treated with serum from ankylosing spondylitis patients had higher PPARD, fra-1, MMP7 and OPG gene expression than did cells treated with serum from controls or rheumatoid arthritis patients (all p<0.05). RANKL expression was higher in MG63 cells treated with serum from patients with ankylosing spondylitis or rheumatoid arthritis than in those treated with serum from controls (both p<0.05). The OPG/RANKL ratio was also higher in MG63 cells treated with serum from ankylosing spondylitis patients than in those treated with serum from controls (p<0.05). No associations were found between the expression of the five genes and the patient demographics and clinical assessments (all p>0.05).CONCLUSIONS: Serum from ankylosing spondylitis patients increases PPARD, fra-1, MMP7, OPG and RANKL expression and the OPG/RANKL ratio in MG63 cells; these effects may be due to the stimulatory effect of the serum on the Wnt pathway.
Keywords:Ankylosing Spondylitis  Wnt Pathway  Gene Expression
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