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Usefulness of Serum Leucine-Rich Alpha-2 Glycoprotein as a Disease Activity Biomarker in Patients with Rheumatoid Arthritis

 You Jung Ha  ;  Eun-Jin Kang  ;  Sang-Won Lee  ;  Soo-Kon Lee  ;  Yong-Beom Park  ;  Jung-Soo Song  ;  Sang Tae Choi 
 Journal of Korean Medical Science, Vol.29(9) : 1199-1204, 2014 
Journal Title
 Journal of Korean Medical Science 
Issue Date
Adult ; Aged ; Area Under Curve ; Arthritis, Rheumatoid/blood ; Arthritis, Rheumatoid/diagnosis* ; Biomarkers/blood ; Blood Sedimentation ; C-Reactive Protein/analysis ; Enzyme-Linked Immunosorbent Assay ; Female ; Glycoproteins/blood* ; Humans ; Male ; Middle Aged ; ROC Curve ; Severity of Illness Index* ; Tumor Necrosis Factor-alpha/blood
Arthritis, Rheumatoid ; Disease Activity ; Leucine-Rich Alpha-2-Glycoprotein ; Tumor Necrosis Factor-alpha
Our study aimed to investigate whether serum leucine-rich alpha-2-glycoprotein (LRG) levels are elevated in patients with rheumatoid arthritis (RA). In addition, we assessed their correlation with disease activity parameters and pro-inflammatory cytokine, tumor necrosis factor-α (TNF-α). Our study included 69 patients with RA and 48 age- and sex-matched healthy controls. Serum concentrations of TNF-α and LRG were determined by enzyme-linked immunosorbent assay. Serum LRG concentrations were significantly elevated in patients with RA compared with those in healthy controls (30.8±14.4 vs. 22.2±6.1 ng/mL; P<0.001). In patients with RA, serum LRG levels were found to be correlated with disease activity score 28 (DAS28), erythrocyte sedimentation rate, and C-reactive protein levels (γ=0.671; γ=0.612; and γ=0.601, P<0.001, respectively), but not with serum TNF-α levels. Serum LRG levels in patients with an active disease status (DAS28≥2.6) were significantly higher than those in remission (DAS28<2.6) (36.45±14.36 vs. 24.63±8.81 ng/mL; P<0.001). Our findings suggest that serum LRG could contribute to the inflammatory process independent of TNF-α and it may be a novel biomarker for assessing inflammatory activity in patients with RA.
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1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
Yonsei Authors
Park, Yong Beom(박용범)
Lee, Sang Won(이상원) ORCID logo https://orcid.org/0000-0002-8038-3341
Lee, Soo Kon(이수곤)
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