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See detailOne-year increase of Coll 2-1, a new marker of type II collagen degradation, in urine is highly predictive of radiological OA progression.
Deberg, Michelle ULg; Labasse, Alain ULg; Collette, Julien ULg et al

in Osteoarthritis and Cartilage (2005), 13(12), 1059-65

OBJECTIVE: To analyse the relationship between the levels of urinary biochemical markers of type II collagen degradation and the clinical and radiological severity and progression of knee osteoarthritis ... [more ▼]

OBJECTIVE: To analyse the relationship between the levels of urinary biochemical markers of type II collagen degradation and the clinical and radiological severity and progression of knee osteoarthritis (OA). METHOD: Seventy-five patients with primary knee OA were included in this 3-year follow-up study. Mean joint space width (JSW) of the medial compartment of the femorotibial joint was measured with a computer assisted method on standardized radiographs taken at baseline and after a 3-year follow-up. Pain, stiffness, and physical function subscales of the Western Ontario and McMaster Universities (WOMAC) were assessed at the same time points. Type II collagen peptides Coll 2-1 and Coll 2-1 NO(2), as well as pyridinoline (Pyr) and deoxypyridinoline (D-Pyr) were measured in urines at baseline, after 1 year and 3 years, with specific immunoassays. RESULTS: At baseline, significant correlations were found between the urinary Coll 2-1 and Coll 2-1 NO(2) levels and the global WOMAC score (Coll 2-1: r=0.28, P=0.01; Coll 2-1 NO(2): r=0.27, P=0.02) and its subscales for pain (Coll 2-1: r=0.27, P=0.01; Coll 2-1 NO(2): r=0.30, P=0.01) and function (Coll 2-1: r=0.29, P=0.01; Coll 2-1 NO(2): r=0.27, P=0.02). Pyr and D-Pyr levels were not significantly correlated with the WOMAC scores. One-year change in Coll 2-1 and Coll 2-1 NO(2) urinary levels were negatively correlated with a 3-year change in JSW (Coll 2-1: r=-0.31, P=0.03; Coll 2-1 NO(2): r=-0.31, P=0.03), indicating that an increase of Coll 2-1 or Coll 2-1 NO(2) over 1 year is predictive of subsequent joint space narrowing. Neither Pyr nor D-Pyr was correlated with radiological OA progression. CONCLUSIONS: At baseline, Coll 2-1 and Coll 2-1 NO(2) urinary levels were indicative of the clinical activity of knee OA and the increase of these peptides over 1 year was predictive of the radiological progression of knee OA. [less ▲]

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See detailDifferential Regulation of Chondrocyte Metabolism by Oncostatin M and Interleukin-6
Sanchez, Christelle ULg; Deberg, Michelle ULg; Devel, Philippe et al

in Osteoarthritis and Cartilage (2004), 12(10), 801-10

OBJECTIVE: To determine the effects of interleukin (IL)-6 and oncostatin M (OSM) added separately or in combination with IL-1beta on human osteoarthritic (OA) chondrocytes in alginate beads. DESIGN: Human ... [more ▼]

OBJECTIVE: To determine the effects of interleukin (IL)-6 and oncostatin M (OSM) added separately or in combination with IL-1beta on human osteoarthritic (OA) chondrocytes in alginate beads. DESIGN: Human chondrocytes were isolated from OA cartilage and cultured in alginate beads for 12 days, in the absence or in the presence of increasing amounts of IL-6 (20-500ng/ml) with its soluble receptor or OSM (0.1-10ng/ml) and with or without IL-1beta (1.7ng/ml). Aggrecan (AGG), transforming growth factor-beta1 (TGF-beta1), stromelysin-1 [matrix metalloprotease (MMP)-3], tissue inhibitor of metalloproteinases-1 (TIMP-1), macrophage inflammatory protein-1 beta (MIP-1beta), IL-6 and IL-8 productions were assayed by specific enzyme amplified sensitivity immunoassays. Prostaglandin (PG)E(2) was measured by a specific radioimmunoassay and nitrite (NO(2)(-)) by a spectrophotometric method based upon the Griess reaction. RESULTS: OSM, but not IL-6, decreased basal AGG and TGF-beta1 synthesis. Although IL-6 stimulated basal TIMP-1 production, it did not significantly modify MMP-3/TIMP-1 ratio. In contrast, 10ng/ml OSM highly increased TIMP-1 production, and decreased by half the ratio MMP-3/TIMP-1. IL-1beta highly stimulated *NO, IL-8, IL-6, MIP-1beta and PGE(2) synthesis but decreased AGG and TGF-beta1 production. Neither IL-6 nor OSM modulated IL-1beta-inhibitory effect on AGG production. IL-6, but not OSM, reversed IL-1beta-induced TGF-beta1 inhibition. At 1-10ng/ml, OSM significantly decreased IL-1beta-stimulated IL-8, MIP-1beta, PGE(2) and *NO production but amplified IL-1beta stimulating effect on IL-6 production. IL-6 had no effect on these parameters. CONCLUSIONS: OSM and IL-6, two glycoprotein 130 binding cytokines, show different activity profiles on OA chondrocytes, indicating that these cytokines could play different roles in the OA disease process. [less ▲]

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See detailType II collagen peptides for measuring cartilage degradation
Henrotin, Yves ULg; Deberg, Michelle ULg; Dubuc, J. E. et al

in Biorheology (2004), 41(3-4), 543-547

This paper describes two new immunoassays for a peptide of the triple helix of type II collagen (Coll 2-1) and its nitrated form (Coll 2-1 NO2). In healthy subjects aged between 20 and 65 years old, Coll ... [more ▼]

This paper describes two new immunoassays for a peptide of the triple helix of type II collagen (Coll 2-1) and its nitrated form (Coll 2-1 NO2). In healthy subjects aged between 20 and 65 years old, Coll 2-1 and Coll 2-1 NO2 levels in serum were in means 125.13+/-3.71 and 0.16+/-0.08 nmol/l, respectively. These levels did not significantly vary with age. However, up to 45 years of age, Coll 2-1 NO2 levels in women were significantly higher than in men. In patients with knee osteoarthritis (OA), Coll 2-1 in serum was found to be elevated compared to healthy controls (267.45+/-26.42 nmol/l vs 126.78+/-6.61 nmol/l). Further, we have demonstrated that an increase of the urinary levels of Coll 2-1 or Coll 2-1 NO2 over 1 year was predictive of joint space narrowing progression in OA patients. In conclusion, these preliminary results indicate that Coll 2-1 could be a predictive marker of knee OA progression. [less ▲]

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See detailRégulation du Métabolisme des Chondrocytes par l'Oncostatine M et l'Interleukine 6
Sanchez, Christelle ULg; Deberg, Michelle ULg; Devel, Philippe et al

in Revue du Rhumatisme (2004), 71(10-11), 1008

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See detailSubchondral bone osteoblasts induce phenotypic changes in human osteoarthritic chondrocytes
Sanchez, Christelle ULg; Deberg, Michelle ULg; Piccardi, Nathalie et al

in Osteoarthritis and Cartilage (2004), 12(Suppl. B), 99-100

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See detailFuranic avocado/soybean unsaponifiables prevent osteoarthritic subchondral osteoblasts-induced cartilage degradation
Sanchez, Christelle ULg; Deberg, Michelle ULg; Piccardi, Nathalie et al

in Osteoarthritis and Cartilage (2004), 12(Suppl. B), 108-109

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See detailEffects of interleukin-1 beta and dexamethasone on the expression by chondrocytes of antioxidant enzymes
Mathy, Marianne ULg; Devel, Philippe; Sanchez, Christelle ULg et al

in Osteoarthritis and Cartilage (2004), 12(Suppl. B), 51-52

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See detailInterleukin-1, interleukin-6 and oncostatin M stimulate normal subchondral osteoblasts to induce cartilage degradation
Sanchez, Christelle ULg; Deberg, Michelle ULg; Piccardi, Nathalie et al

in Osteoarthritis and Cartilage (2004), 12(Suppl. B), 98

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See detailCartilage degradation and oxidative damage in OA and RA patients
Deberg, Michelle ULg; Labasse, Alain ULg; Christgau, S. et al

in Osteoporosis International (2003, November), 14(Suppl. 7), 44-45

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See detailOne-year increase of Coll 2-1 level in urine is predictive of OA progression
Henrotin, Yves ULg; Deberg, Michelle ULg; Labasse, Alain ULg et al

in Osteoporosis International (2003, November), 14(Suppl. 7), 12

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See detailCartilage degradation and oxidative damage in osteoarthritic and rheumatoid arthritic patients
Deberg, Michelle ULg; Labasse, Alain ULg; Christgau, Stephan et al

in Osteoarthritis and Cartilage (2003, October), 11(Suppl.1), 15

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See detailAvocado/soybean unsaponifiables increase aggrecan synthesis and reduce catabolic and proinflammatory mediator production by human osteoarthritic chondrocytes
Henrotin, Yves ULg; Sanchez, Christelle ULg; Deberg, Michelle ULg et al

in Journal of Rheumatology (2003), 30(8), 1825-1834

OBJECTIVE: To investigate the effects of avocado (A)/soybean (S) unsaponifiables on the metabolism of human osteoarthritic (OA) chondrocytes cultured in alginate beads over 12 days. METHODS: Enzymatically ... [more ▼]

OBJECTIVE: To investigate the effects of avocado (A)/soybean (S) unsaponifiables on the metabolism of human osteoarthritic (OA) chondrocytes cultured in alginate beads over 12 days. METHODS: Enzymatically isolated OA chondrocytes were cultured in alginate beads in a well defined culture medium for 12 days, in the presence or not of 10-10 M interleukin 1beta (IL-1beta). DNA content was measured using a fluorometric method. Production of aggrecan (AGG), stromelysin-1 (MMP-3), tissue inhibitor of metalloproteinases-1 (TIMP-1), macrophage inflammatory protein-1beta (MIP-1beta), IL-6, and IL-8 were assayed by specific enzyme amplified sensitivity immunoassays. Prostaglandin (PG) E2 was measured by a specific radioimmunoassay and nitrite by a spectrophotometric method based on the Griess reaction. A commercial avocado and soybean mixture of unsaponifiables (A1S2) and each component separately were tested in a range of 0.625 to 40.0 micro g/ml. RESULTS: After 12 days' incubation, A1S2 increased AGG synthesis and accumulation in alginate beads in a dose and time dependent manner. A1S2 promoted the recovery of aggrecan synthesis after 3 days of IL-1beta treatment. A1S2 was a potent inhibitor of basal and IL-1beta stimulated MMP-3 production. The procedure also weakly reversed the inhibitory effect of IL-1beta on TIMP-1 production. A1S2 inhibited basal production of MIP-1beta, IL-6, IL-8, NO*, and PGE2 by OA chondrocytes and partially counteracted the stimulating effect of IL-1 on PGE2. Compared to avocado or soybean added separately, the mixture had a superior effect on NO* and IL-8 production. CONCLUSION: A1S2 stimulated aggrecan production and restored aggrecan production after IL-1beta treatment. In parallel, A1S2 decreased MMP-3 production and stimulated TIMP-1 production. These results suggest A1S2 could have structure-modifying effects in OA by inhibiting cartilage degradation and promoting cartilage repair. [less ▲]

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See detailEffects of rhein on human articular chondrocytes in alginate beads
Sanchez, Christelle ULg; Mathy-Hartert, Marianne; Deberg, Michelle ULg et al

in Biochemical Pharmacology (2003), 65(3), 377-388

This study was designed to investigate the effects of them, the active metabolite of diacerhein, on the metabolic functions of human chondrocytes cultured in alginate beads. Enzymatically isolated ... [more ▼]

This study was designed to investigate the effects of them, the active metabolite of diacerhein, on the metabolic functions of human chondrocytes cultured in alginate beads. Enzymatically isolated ostcoarthritic (OA) chondrocytes were cultured in alginate beads in a well-defined culture medium for 12 days. Rhein was tested in a range of concentrations comprised between 10(-7) and 4 x 10(-5) M, in the presence or absence of 10(-10) M IL-1beta. Interleukin (IL)-6 and -8, macrophage inflammatory protein (MIP-1beta), stromelysin-1 (MMP-3), aggrecan (AGG), tissue inhibitor of metalloproteinases-1 (TIMP-1), prostaglandin E-2 (PGE(2)) and nitric oxide (NO) productions were assayed. Cyclooxygenase-2 (COX-2) and inducible NO synthase (iNOS) mRNA steady-state levels were also quantified. In the basal condition, 10(-5) M them increased by 46.5% the production of AGG, decreased by 17-30% the production of IL-6, MMP-3, NO and MIP-1beta but enhanced by 50% the production of PGE2(.) IL-1beta increased IL-6, IL-8, MIP-1beta, NO, PGE(2) and MMP-3 productions, but inhibited AGG and TIMP-1 synthesis. Rhein partially reversed the effect of IL-1beta on TIMP-1 and NO production, had no effect on AGG, IL-6 and MIP-1P production, but upregulated the IL-1beta stimulated PGE(2) production. The COX-2 and iNOS mRNA levels and IL-8 production were not modified by rhein. Overall, these results contribute to explain the clinical efficiency of rhein and give new information on its mechanisms of action. (C) 2002 Elsevier Science Inc. All rights reserved. [less ▲]

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