References of "Sanchez, Christelle"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailFibulin-3 fragments are prognostic biomarkers of osteoarthritis incidence in overweight and obese women
Runhaar, Jos; Sanchez, Christelle ULg; Taralla, Sébastien et al

in Osteoarthritis Cartilage (in press)

OBJECTIVE: To determine the association between three fibulin-3 peptides and the incidence of radiographic and clinical knee osteoarthritis (OA). DESIGN: Women between 50 and 60 years, with a BMI >/=27 kg ... [more ▼]

OBJECTIVE: To determine the association between three fibulin-3 peptides and the incidence of radiographic and clinical knee osteoarthritis (OA). DESIGN: Women between 50 and 60 years, with a BMI >/=27 kg/m2, free of knee OA, were recruited. Using binary logistic regression, the association between baseline concentration of serum fibulin (Fib)3-1, Fib3-2 and Fib3-3 and incidence of clinical and radiographic knee OA after 30 months of follow-up was evaluated. RESULTS: Baseline and follow-up measurements were available for 241 women with a mean age of 55.9 +/- 3.2 years and mean BMI of 31.7 +/- 3.6 kg/m2. None of the concentrations of the three Fib3 epitopes were associated with the incidence of medial or lateral joint space narrowing (JSN) >/=1.0 mm or the incidence of Kellgren & Lawrence (K&L) grade >/=2 after 30 months. All three Fib3 epitopes were associated with the incidence of the clinical and radiographic ACR-criteria and Fib3-1 and Fib3-3 also with chronic pain at follow-up. When adjusted for the other Fib3 peptide concentrations, only Fib3-1 was significantly associated to the incidence of the American College of Rheumatology (ACR)-criteria (OR 3.2 [1.2-8.7]) and chronic pain at follow-up (OR 3.0 [1.2-7.7]). CONCLUSIONS: Baseline fibulin-3 concentrations are associated with the incidence of clinical knee OA among middle-aged overweight and obese women. Therewith, they meet the criteria of a prognostic biomarker according to the BIPED biomarker classification for OA. Further validation of the fibulin-3 epitopes seems warranted in order to better distinguish subgroups of individuals at increased risk for knee OA development. [less ▲]

Detailed reference viewed: 11 (2 ULg)
Full Text
Peer Reviewed
See detailChitosan enriched three-dimensional matrix reduces inflammatory and catabolic mediators production by human chondrocytes
Oprenyeszk, Frédéric ULg; Sanchez, Christelle ULg; Dubuc, Jean-Emile et al

in PLoS ONE (2015), 10(5),

This in vitro study investigated the metabolism of human osteoarthritic (OA) chondrocytes encapsulated in a spherical matrix enriched of chitosan. Human OA chondrocytes were encapsulated and cultured for ... [more ▼]

This in vitro study investigated the metabolism of human osteoarthritic (OA) chondrocytes encapsulated in a spherical matrix enriched of chitosan. Human OA chondrocytes were encapsulated and cultured for 28 days either in chitosan-alginate beads or in alginate beads. The beads were formed by slowly passed dropwise either the chitosan 0.6%- alginate 1.2% or the alginate 1.2% solution through a syringe into a 102 mM CaCl2 solution. Beads were analyzed histologically after 28 days. Interleukin (IL)-6 and -8, prostaglandin (PG) E2, matrix metalloproteinases (MMPs), hyaluronan and aggrecan were quantified directly in the culture supernatant by specific ELISA and nitric oxide (NO) by using a colorimetric method based on the Griess reaction. Hematoxylin and eosin staining showed that chitosan was homogeneously distributed through the matrix and was in direct contact with chondrocytes. The production of IL-6, IL-8 and MMP-3 by chondrocytes significantly decreased in chitosan-alginate beads compared to alginate beads. PGE2 and NO decreased also significantly but only during the first three days of culture. Hyaluronan and aggrecan production tended to increase in chitosan-alginate beads after 28 days of culture. Chitosan-alginate beads reduced the production of inflammatory and catabolic mediators by OA chondrocytes and tended to stimulate the synthesis of cartilage matrix components. These particular effects indicate that chitosan-alginate beads are an interesting scaffold for chondrocytes encapsulation before transplantation to repair cartilage defects. [less ▲]

Detailed reference viewed: 99 (27 ULg)
Full Text
Peer Reviewed
See detailBaseline Fibulin3 concentrations are associated with incidence of clinical knee OA after 30 months in overweight and obese women
Runhaar, Jos; Sanchez, Christelle ULg; Henrotin, Yves ULg et al

in Osteoarthritis and Cartilage (2015, April), 23(S2), 83

Detailed reference viewed: 14 (1 ULg)
Full Text
Peer Reviewed
See detailRestriction of spontaneous and prednisolone-induced leptin production to dedifferentiated state in human hip OA chondrocytes: role of Smad1 and b-catenin activation
CHARLIER, Edith ULg; MALAISE, Olivier ULg; Zeddou, Mustapha et al

in Osteoarthritis and Cartilage (2015)

Objective: The aetiology of OA is not fully understood although several adipokines such as leptin are known mediators of disease progression. Since leptin levels were increased in synovial fluid compared ... [more ▼]

Objective: The aetiology of OA is not fully understood although several adipokines such as leptin are known mediators of disease progression. Since leptin levels were increased in synovial fluid compared to serum in OA patients, it was suggested that joint cells themselves could produce leptin. However, exact mechanisms underlying leptin production by chondrocytes are poorly understood. Nevertheless, prednisolone, although displaying powerful anti-inflammatory properties has been recently reported to be potent stimulator of leptin and its receptor in OA synovial fibroblasts. Therefore, we investigated, in vitro, spontaneous and prednisolone-induced leptin production in OA chondrocytes, focusing on transforming growth factor-b (TGFb) and Wnt/b-catenin pathways. Design: We used an in vitro dedifferentiation model, comparing human freshly isolated hip OA chondrocytes cultivated in monolayer during 1 day (type II, COL2A1 þ; type X, COL10A1 þ and type I collagen, COL1A1 ") or 14 days (COL2A1 "; COL10A1 " and COL1A1þ). Results: Leptin expression was not detected in day1 OA chondrocytes whereas day14 OA chondrocytes produced leptin, significantly increased with prednisolone. Activin receptor-like kinase 1 (ALK1)/ALK5 ratio was shifted during dedifferentiation, from high ALK5 and phospho (p)-Smad2 expression at day1 to high ALK1, endoglin and p-Smad1/5 expression at day14. Moreover, inactive glycogen synthase kinase 3 (GSK3) and active b-catenin were only found in dedifferentiated OA chondrocytes. Smad1 and b-catenin but not endoglin stable lentiviral silencing led to a significant decrease in leptin production by dedifferentiated OA chondrocytes. Conclusions: Only dedifferentiated OA chondrocytes produced leptin. Prednisolone markedly enhanced leptin production, which involved Smad1 and b-catenin activation [less ▲]

Detailed reference viewed: 10 (3 ULg)
Full Text
Peer Reviewed
See detailBaseline Fibulin3 Concentrations Are Associated with Incidence of Clinical Knee OA after 30 Months in Overweight and Obese Women
Runhaar; Sanchez, Christelle ULg; Taralla, Sébastien et al

in Arthritis and Rheumatism (2015), 67(Suppl10),

Detailed reference viewed: 14 (0 ULg)
Full Text
Peer Reviewed
See detailCarnosol Inhibits Pro-Inflammatory and Catabolic Mediators of Cartilage Breakdown in Human Osteoarthritic Chondrocytes and Mediates Cross-Talk between Subchondral Bone Osteoblasts and Chondrocytes.
Sanchez, Christelle ULg; Horcajada, Marie-Noelle; Membrez Scalfo, Fanny et al

in PloS one (2015), 10(8), 0136118

AIM: The aim of this work was to evaluate the effects of carnosol, a rosemary polyphenol, on pro-inflammatory and catabolic mediators of cartilage breakdown in chondrocytes and via bone-cartilage ... [more ▼]

AIM: The aim of this work was to evaluate the effects of carnosol, a rosemary polyphenol, on pro-inflammatory and catabolic mediators of cartilage breakdown in chondrocytes and via bone-cartilage crosstalk. MATERIALS AND METHODS: Osteoarthritic (OA) human chondrocytes were cultured in alginate beads for 4 days in presence or absence of carnosol (6 nM to 9 muM). The production of aggrecan, matrix metalloproteinase (MMP)-3, tissue inhibitor of metalloproteinase (TIMP)-1, interleukin (IL)-6 and nitric oxide (NO) and the expression of type II collagen and ADAMTS-4 and -5 were analyzed. Human osteoblasts from sclerotic (SC) or non-sclerotic (NSC) subchondral bone were cultured for 3 days in presence or absence of carnosol before co-culture with chondrocytes. Chondrocyte gene expression was analyzed after 4 days of co-culture. RESULTS: In chondrocytes, type II collagen expression was significantly enhanced in the presence of 3 muM carnosol (p = 0.008). MMP-3, IL-6, NO production and ADAMTS-4 expression were down-regulated in a concentration-dependent manner by carnosol (p<0.01). TIMP-1 production was slightly increased at 3 muM (p = 0.02) and ADAMTS-5 expression was decreased from 0.2 to 9 muM carnosol (p<0.05). IL-6 and PGE2 production was reduced in the presence of carnosol in both SC and NSC osteoblasts while alkaline phosphatase activity was not changed. In co-culture experiments preincubation of NSC and SC osteoblasts wih carnosol resulted in similar effects to incubation with anti-IL-6 antibody, namely a significant increase in aggrecan and decrease in MMP-3, ADAMTS-4 and -5 gene expression by chondrocytes. CONCLUSIONS: Carnosol showed potent inhibition of pro-inflammatory and catabolic mediators of cartilage breakdown in chondrocytes. Inhibition of matrix degradation and enhancement of formation was observed in chondrocytes cocultured with subchondral osteoblasts preincubated with carnosol indicating a cross-talk between these two cellular compartments, potentially mediated via inhibition of IL-6 in osteoblasts as similar results were obtained with anti-IL-6 antibody. [less ▲]

Detailed reference viewed: 16 (3 ULg)
Full Text
Peer Reviewed
See detailOleuropein or rutin consumption decreases the spontaneous development of osteoarthritis in the Hartley guinea pig.
Horcajada, M.-N.; Sanchez, Christelle ULg; Membrez Scalfo et al

in Osteoarthritis and cartilage / OARS, Osteoarthritis Research Society (2015), 23(1), 94-102

OBJECTIVE: To assess the potential protective effects of three polyphenols oleuropein, rutin and curcumin, on joint ageing and osteoarthritis (OA) development. DESIGN: Sixty 4-week-old Dunkin-Hartley ... [more ▼]

OBJECTIVE: To assess the potential protective effects of three polyphenols oleuropein, rutin and curcumin, on joint ageing and osteoarthritis (OA) development. DESIGN: Sixty 4-week-old Dunkin-Hartley guinea pigs were randomized into four groups and received daily during 31 weeks either standard guinea pig diet (control group) or a standard guinea pig diet enriched with oleuropein (0.025%), rutin (0.5%) or rutin/curcumin (0.5%/0.25%) association. Biomarkers of OA (Coll2-1, Coll2-1NO2, Fib3-1, Fib3-2, ARGS), as well as inflammation (PGE2) were quantified in the serum. Histological assessments of knee cartilage and synovial membrane were performed at week 4 (five young reference guinea pigs) and week 35. RESULTS: At week 35, guinea pigs in the control group spontaneously developed significant cartilage lesions with mild synovial inflammation. The histological scores of cartilage lesions and synovitis were well correlated with the increased level of serum biomarkers. Histologically, all treatments significantly reduced the cartilage degradation score (P < 0.01), but only oleuropein significantly decreased the synovial histological score (P < 0.05) and serum PGE2 levels (P < 0.01) compared to the control group. Coll2-1 was decreased by rutin and the combination of rutin/curcumin, Fib3-1 and Fib3-2 were only decreased by the rutin/curcumin mixture, while Coll2-1NO2 was significantly decreased by all treatments (P < 0.05). CONCLUSION: Oleuropein and rutin +/- curcumin significantly slowed down the progression of spontaneous OA lesions in guinea pigs. While no additive effect was seen in the curcumin + rutin group, the differential effects of oleuropein and rutin on inflammatory and cartilage catabolic markers suggest an interesting combination for future studies in OA protection. [less ▲]

Detailed reference viewed: 36 (9 ULg)
Full Text
See detailCell cultivation in chitosan alginate hydrogel beads
Henrotin, Yves ULg; Kesteloot, Frédéric; Sanchez, Christelle ULg

Patent (2014)

Detailed reference viewed: 32 (2 ULg)
Full Text
Peer Reviewed
See detailBone sialoprotein as a potential key factor implicated in the pathophysiology of osteoarthritis
Pesesse, Laurence ULg; Sanchez, Christelle ULg; Walsh, David et al

in Osteoarthritis and Cartilage (2014), 22(4), 547-56

Detailed reference viewed: 15 (4 ULg)
Full Text
Peer Reviewed
See detailOleuropein or rutin consumption decreases the spontaneous development of OA in Hartley guinea pig
Sanchez, Christelle ULg; Horcajada, Marie-Noëlle; Membrez, Fanny et al

Conference (2013, November 23)

Detailed reference viewed: 16 (4 ULg)
See detailASSOCIATION BETWEEN CHONDROCYTE HYPERTROPHY AND ANGIOGENESIS OF CARTILAGE IN OSTEOARTHRITIS
Pesesse, Laurence ULg; Sanchez, Christelle ULg; Delcour, Jean-Pierre et al

Conference (2013, November)

Detailed reference viewed: 21 (5 ULg)
See detailBONE SIALOPROTEIN AS A KEY FACTOR IN THE PATHOPHYSIOLOGY OF OSTEOARTHRITIS
Pesesse, Laurence ULg; Sanchez, Christelle ULg; Walsh, David et al

Conference (2013, November)

Detailed reference viewed: 10 (1 ULg)