PMID- 29164307 OWN - NLM STAT- MEDLINE DCOM- 20180924 LR - 20181113 IS - 1437-160X (Electronic) IS - 0172-8172 (Linking) VI - 38 IP - 5 DP - 2018 May TI - Cartilage oligomeric protein, matrix metalloproteinase-3, and Coll2-1 as serum biomarkers in knee osteoarthritis: a cross-sectional study. PG - 821-830 LID - 10.1007/s00296-017-3887-y [doi] AB - Biochemical markers reflecting joint remodeling in osteoarthritis (OA) are a promising diagnostic tool. The aim of this study was to investigate serum levels of candidate biomarkers in subjects with and without knee OA and assess their correlation with clinical parameters and knee structural damage. 56 patients with primary knee OA and 31 healthy controls participated in this study. Patients were separated into two groups: isolated knee OA and generalized OA. Clinical parameters were obtained by validated self-reported questionnaires and a visual analogue scale. Serum levels of cartilage oligomeric protein (COMP), matrix metalloproteinase-3 (MMP-3), and Coll2-1 were quantified by enzyme-linked immunosorbent assay. Knee structural damage was determined by plain X-ray and 1.5 T magnetic resonance imaging (MRI), using Kellgren-Lawrence (KL) grading scale and Whole-Organ Magnetic Resonance Imaging Score (WORMS), respectively. Compared to controls, patients had significantly higher median serum COMP (985 vs. 625 ng/ml; p < 0.001) and MMP-3 (36.85 vs. 22.10 ng/ml; p = 0.003) levels. Patients with radiographic evidence of KLII/III knee OA had greater median COMP levels than KLI patients (1095 vs. 720 ng/ml; p = 0.001). In the generalized OA group, mean MMP-3 levels were higher than in the isolated knee OA group (30.40 vs. 55.13 ng/ml; p < 0.001). COMP correlated positively with WORMS (r (s) = 0.454, p < 0.001) and MMP-3 (r (s) = 0.337, p = 0.003). Cut-off values for serum COMP and MMP-3 were determined. We observed higher serum COMP and MMP-3 levels in knee OA patients compared to controls. COMP may reflect knee structural damage, while MMP-3-OA "generalization". FAU - Georgiev, Tsvetoslav AU - Georgiev T AUID- ORCID: 0000-0002-1652-4648 AD - Clinic of Rheumatology, University Hospital "St. Ivan Rilski", Medical Faculty, Medical University of Sofia, Sofia, Bulgaria. tsetso@medfaculty.org. FAU - Ivanova, Mariana AU - Ivanova M AD - Clinic of Rheumatology, University Hospital "St. Ivan Rilski", Medical Faculty, Medical University of Sofia, Sofia, Bulgaria. FAU - Kopchev, Aleksandar AU - Kopchev A AD - Clinic of Rheumatology, University Hospital "St. Ivan Rilski", Medical Faculty, Medical University of Sofia, Sofia, Bulgaria. FAU - Velikova, Tsvetelina AU - Velikova T AD - Laboratory of Clinical Immunology, University Hospital "Lozenets", Medical Faculty, Sofia University, Sofia, Bulgaria. FAU - Miloshov, Asen AU - Miloshov A AD - Radiology Department, University Hospital "St. Ivan Rilski", Sofia, Bulgaria. FAU - Kurteva, Ekaterina AU - Kurteva E AD - Laboratory of Clinical Immunology, University Hospital "St. Ivan Rilski", Medical Faculty, Medical University of Sofia, Sofia, Bulgaria. FAU - Yuzeir, Kalina AU - Yuzeir K AD - Laboratory of Clinical Immunology, University Hospital "St. Ivan Rilski", Medical Faculty, Medical University of Sofia, Sofia, Bulgaria. FAU - Penkov, Marin AU - Penkov M AD - Radiology Department, University Hospital "St. Ivan Rilski", Sofia, Bulgaria. FAU - Kabakchieva, Plamena AU - Kabakchieva P AD - Clinic of Endocrinology, University Hospital "Aleksandrovska", Medical Faculty, Medical University of Sofia, Sofia, Bulgaria. FAU - Rashkov, Rasho AU - Rashkov R AD - Clinic of Rheumatology, University Hospital "St. Ivan Rilski", Medical Faculty, Medical University of Sofia, Sofia, Bulgaria. FAU - Stoilov, Rumen AU - Stoilov R AD - Clinic of Rheumatology, University Hospital "St. Ivan Rilski", Medical Faculty, Medical University of Sofia, Sofia, Bulgaria. LA - eng GR - Project "Young Investigator" No 353/2015, contract No 22-D/2015/Medical University Sofia/ PT - Journal Article DEP - 20171121 PL - Germany TA - Rheumatol Int JT - Rheumatology international JID - 8206885 RN - 0 (Biomarkers) RN - 0 (COMP protein, human) RN - 0 (Cartilage Oligomeric Matrix Protein) RN - 0 (Collagen Type II) RN - 0 (Peptide Fragments) RN - 0 (collagen type II (108-116)) RN - EC 3.4.24.17 (MMP3 protein, human) RN - EC 3.4.24.17 (Matrix Metalloproteinase 3) SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - Area Under Curve MH - Biomarkers/blood MH - Cartilage Oligomeric Matrix Protein/*blood MH - Case-Control Studies MH - Collagen Type II/*blood MH - Cross-Sectional Studies MH - Enzyme-Linked Immunosorbent Assay MH - Female MH - Humans MH - Knee Joint/*metabolism/physiopathology MH - Magnetic Resonance Imaging MH - Male MH - Matrix Metalloproteinase 3/*blood MH - Middle Aged MH - Osteoarthritis, Knee/*blood/diagnostic imaging/physiopathology MH - Peptide Fragments/*blood MH - Predictive Value of Tests MH - ROC Curve MH - Self Report MH - Up-Regulation OTO - NOTNLM OT - Biomarkers OT - Knee OT - Magnetic resonance imaging OT - Osteoarthritis OT - Radiography EDAT- 2017/11/23 06:00 MHDA- 2018/09/25 06:00 CRDT- 2017/11/23 06:00 PHST- 2017/09/16 00:00 [received] PHST- 2017/11/19 00:00 [accepted] PHST- 2017/11/23 06:00 [pubmed] PHST- 2018/09/25 06:00 [medline] PHST- 2017/11/23 06:00 [entrez] AID - 10.1007/s00296-017-3887-y [pii] AID - 10.1007/s00296-017-3887-y [doi] PST - ppublish SO - Rheumatol Int. 2018 May;38(5):821-830. doi: 10.1007/s00296-017-3887-y. Epub 2017 Nov 21.