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Serum Amyloid A as a Useful Indicator of Disease Activity in Patients with Ankylosing Spondylitis

Authors
 Sang Youn Jung  ;  Min-Chan Park  ;  Soo-Kon Lee  ;  Yong-Beom Park 
Citation
 Yonsei Medical Journal, Vol.48(2) : 218-224, 2007 
Journal Title
 Yonsei Medical Journal 
ISSN
 0513-5796 
Issue Date
2007
Abstract
PURPOSE: To investigate whether serum amyloid A (SAA) levels are increased in patients with ankylosing spondylitis (AS) and whether its levels correlate well with AS disease activity. MATERIALS AND METHODS: Thirty-eight patients with AS and 38 age- and sex-matched control subjects were enrolled in this cross-sectional study. Their SAA levels were quantitatively measured by immunonephelometry. An established, self-administered instrument for evaluating disease activity (Bath Ankylosing Spondylitis Disease Activity Index, BASDAI) was used to measure and acute phase reactants, including erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP), in patients with AS. RESULTS: Patients with AS had a significantly higher mean SAA level than controls (9.52 +/- 7.49mg/L versus 2.73 +/- 1.57mg/L, p < 0.05), and the mean BASDAI score of patients with elevated SAA levels was significantly higher than that of patients with normal SAA levels (5.6 +/- 1.3 versus 4.4 +/- 1.5, p < 0.05). SAA levels showed significant correlations with BASDAI scores (r=0.431, p=0.007), ESR (r=0.521, p=0.001) and CRP levels (r=0.648, p < 0.001). Additionally, the correlation between ESR and CRP levels also appeared significant (r=0.703, p < 0.001). In those with normal ESR or CRP levels, SAA levels and BASDAI scores were elevated (p < 0.05) and showed a trend of positive correlation with one another. CONCLUSION: Our data showed that SAA levels were increased in patients with AS and correlated well with disease activity. These findings suggest that SAA can be used as a valuable indicator of disease activity in AS.
Files in This Item:
T200700678.pdf Download
DOI
10.3349/ymj.2007.48.2.218
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
Yonsei Authors
박민찬(Park, Min Chan) ORCID logo https://orcid.org/0000-0003-1189-7637
박용범(Park, Yong Beom)
이수곤(Lee, Soo Kon)
정상윤(Jung, Sang Youn)
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URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/97516
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