TY - JOUR
T1 - New serum biochemical markers (Coll 2-1 and Coll 2-1 NO2) for studying oxidative-related type II collagen network degradation in patients with osteoarthritis and rheumatoid arthritis.
AU - Deberg, Michelle
AU - Labasse, Alain
AU - Christgau, Stephan
AU - Cloos, Paul
AU - Bang Henriksen, Dennis
AU - Chapelle, Jean-Pierre
AU - Zegels, Brigitte
AU - Reginster, Jean-Yves
AU - Henrotin, Yves
N1 - Keywords: Adult; Aging; Animals; Antibody Specificity; Arthritis, Rheumatoid; Biological Markers; Collagen Type II; Enzyme-Linked Immunosorbent Assay; Free Radicals; Humans; Immune Sera; Middle Aged; Nitrates; Osteoarthritis; Oxidation-Reduction; Peptide Fragments; Rabbits; Reproducibility of Results
PY - 2005
Y1 - 2005
N2 - OBJECTIVE: Protein nitration is a prominent feature of inflammatory processes in the joint. We have developed immunoassays specific for a peptide of the alpha-helical region of type II collagen 108HRGYPGLDG116 (Coll 2-1) and its nitrated form 108HRGY(NO2)PGLDG116 (Coll 2-1 NO2) in biological fluids. DESIGN: Coll 2-1 and Coll 2-1 NO2 peptides were injected into rabbits. Two antisera (D3 and D37) were selected for their specificity and affinity and used to develop specific immunoassays. Coll 2-1 and Coll 2-1 NO2 were measured in sera of 242 healthy subjects (N), 67 patients with primary knee osteoarthritis (OA) and 19 patients with rheumatoid arthritis (RA). RESULTS: In healthy subjects, Coll 2-1 and Coll 2-1 NO2 concentrations were 125.13+/-3.71 nM and 0.16+/-0.08 nM, respectively. In OA and RA, Coll 2-1 and Coll 2-1 NO2 serum levels were found to be significantly increased compared to controls of the same range of age (Coll 2-1: OA: 200.80+/-8.98 nM, RA: 172.30+/-19.05 nM, normal: 126.60+/-6.70 nM and Coll 2-1 NO2: OA: 0.26+/-0.02, RA: 0.38+/-0.05, normal: 0.12+/-0.01 nM). Coll 2-1 NO2 levels were significantly more elevated in RA than in OA patients (P<0.05). As a consequence, the ratio Coll 2-1 NO2/Coll 2-1 was 1.6 times higher in RA than in OA subjects. No relationship was found between the radiological OA severity and the levels of Coll 2-1 and Coll 2-1 NO2 in serum. Coll 2-1 NO2, but not Coll 2-1, was correlated with C-reactive protein in the sera of OA and RA patients. CONCLUSIONS: The determination of both Coll 2-1 and Coll 2-1 NO2 in serum of arthritic patients seems to be a promising useful tool for the detection of oxidative-related cartilage degradation episode. Further, these markers could be helpful for monitoring the effects of anti-inflammatory or antioxidant drugs on cartilage degradation.
AB - OBJECTIVE: Protein nitration is a prominent feature of inflammatory processes in the joint. We have developed immunoassays specific for a peptide of the alpha-helical region of type II collagen 108HRGYPGLDG116 (Coll 2-1) and its nitrated form 108HRGY(NO2)PGLDG116 (Coll 2-1 NO2) in biological fluids. DESIGN: Coll 2-1 and Coll 2-1 NO2 peptides were injected into rabbits. Two antisera (D3 and D37) were selected for their specificity and affinity and used to develop specific immunoassays. Coll 2-1 and Coll 2-1 NO2 were measured in sera of 242 healthy subjects (N), 67 patients with primary knee osteoarthritis (OA) and 19 patients with rheumatoid arthritis (RA). RESULTS: In healthy subjects, Coll 2-1 and Coll 2-1 NO2 concentrations were 125.13+/-3.71 nM and 0.16+/-0.08 nM, respectively. In OA and RA, Coll 2-1 and Coll 2-1 NO2 serum levels were found to be significantly increased compared to controls of the same range of age (Coll 2-1: OA: 200.80+/-8.98 nM, RA: 172.30+/-19.05 nM, normal: 126.60+/-6.70 nM and Coll 2-1 NO2: OA: 0.26+/-0.02, RA: 0.38+/-0.05, normal: 0.12+/-0.01 nM). Coll 2-1 NO2 levels were significantly more elevated in RA than in OA patients (P<0.05). As a consequence, the ratio Coll 2-1 NO2/Coll 2-1 was 1.6 times higher in RA than in OA subjects. No relationship was found between the radiological OA severity and the levels of Coll 2-1 and Coll 2-1 NO2 in serum. Coll 2-1 NO2, but not Coll 2-1, was correlated with C-reactive protein in the sera of OA and RA patients. CONCLUSIONS: The determination of both Coll 2-1 and Coll 2-1 NO2 in serum of arthritic patients seems to be a promising useful tool for the detection of oxidative-related cartilage degradation episode. Further, these markers could be helpful for monitoring the effects of anti-inflammatory or antioxidant drugs on cartilage degradation.
U2 - 10.1016/j.joca.2004.12.002
DO - 10.1016/j.joca.2004.12.002
M3 - Journal article
C2 - 15727893
SN - 1063-4584
VL - 13
SP - 258
EP - 265
JO - Osteoarthritis and Cartilage
JF - Osteoarthritis and Cartilage
IS - 3
ER -