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Research ArticlePediatric Rheumatology

Soluble Receptor for Advanced Glycation Endproducts Is Decreased in Patients with Juvenile Idiopathic Arthritis (ERA Category) and Inversely Correlates with Disease Activity and S100A12 Levels

ARPITA MYLES, VISHAD VISWANATH, YOGESH PREET SINGH and AMITA AGGARWAL
The Journal of Rheumatology September 2011, 38 (9) 1994-1999; DOI: https://doi.org/10.3899/jrheum.110058
ARPITA MYLES
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VISHAD VISWANATH
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YOGESH PREET SINGH
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AMITA AGGARWAL
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  • For correspondence: amita@sgpgi.ac.in aa.amita@gmail.com
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Abstract

Objective. Membrane-bound receptor for advanced glycation endproducts (mRAGE) is overexpressed in response to increasing concentrations of its ligand (e.g., S100A12) and triggers an inflammatory immune response. In contrast, soluble RAGE (sRAGE) acts as a decoy receptor and downmodulates inflammation. Decreased sRAGE levels are associated with autoimmune diseases; however, limited data are available in juvenile idiopathic arthritis (JIA). We studied sRAGE levels in patients with JIA [enthesitis-related arthritis (ERA) category].

Methods. sRAGE levels were estimated in the serum of patients with ERA JIA (n = 101), systemic-onset JIA and polyarticular JIA (n = 10 each), and healthy controls (n = 45). Synovial fluid (SF) sRAGE was measured in patients with ERA, rheumatoid arthritis, reactive arthritis, and osteoarthritis (n = 10). Levels of S100A12 were also measured. Twenty-four patients with ERA were followed for 4 months. Disease activity was assessed by swollen joint count (SJC), tender joint count (TJC), and erythrocyte sedimentation rate (ESR). All levels are expressed as median (range).

Results. The serum sRAGE (pg/ml) level was significantly lower in patients compared to healthy controls [515 (64–1887) vs 1542 (627–3159); p < 0.0001]. In paired samples, SF had lower levels compared to corresponding plasma level [102 (51–799) vs 481 (134–1006); p < 0.0001]. The level of S100A12 (ng/ml) was higher in SF (1042; 573–1415) than serum (638; 208–779). Serum sRAGE correlated negatively with S100A12 levels (r = −0.474; p < 0.01.), ESR (r = −0.306; p < 0.01), and SJC (r = −0.237; p < 0.05), but not with TJC (r = −0.134; p = NS). The levels of sRAGE remained stable over time in patients with stable disease.

Conclusion. Levels of sRAGE are reduced in patients with ERA and correlate negatively with disease activity and S100A12 levels. sRAGE may be a modulator of inflammation in these patients.

Key Indexing Terms:
  • JUVENILE ARTHRITIS
  • INFLAMMATION
  • DISEASE ACTIVITY
  • RECEPTOR FOR ADVANCED GLYCATION ENDPRODUCTS

Footnotes

  • Supported by a grant from the Department of Biotechnology, Government of India, to Dr. Aggarwal. Ms. Myles is supported by the Council of Scientific and Industrial Research-Junior Research Fellowship.

  • Accepted for publication April 21, 2011.
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Vol. 38, Issue 9
1 Sep 2011
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Soluble Receptor for Advanced Glycation Endproducts Is Decreased in Patients with Juvenile Idiopathic Arthritis (ERA Category) and Inversely Correlates with Disease Activity and S100A12 Levels
ARPITA MYLES, VISHAD VISWANATH, YOGESH PREET SINGH, AMITA AGGARWAL
The Journal of Rheumatology Sep 2011, 38 (9) 1994-1999; DOI: 10.3899/jrheum.110058

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Soluble Receptor for Advanced Glycation Endproducts Is Decreased in Patients with Juvenile Idiopathic Arthritis (ERA Category) and Inversely Correlates with Disease Activity and S100A12 Levels
ARPITA MYLES, VISHAD VISWANATH, YOGESH PREET SINGH, AMITA AGGARWAL
The Journal of Rheumatology Sep 2011, 38 (9) 1994-1999; DOI: 10.3899/jrheum.110058
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