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  • Open Access

    ARTICLE

    Structure and secretory activity of cultured chondrocytes from patients with osteoarthritis

    HILDA L. MONTRULL, NILDA Y. BRIZUELA, SILVIA L. DEMURTAS, LUIS SPITALE* , CARLOS I. MEIROVICH.

    BIOCELL, Vol.29, No.2, pp. 163-167, 2005, DOI:10.32604/biocell.2005.29.163

    Abstract Cartilage samples were taken from OA patients in order to describe and quantify pro-inflammatory mediators. Samples were cultured under aseptic conditions in Dulbecco’s modified Eagle medium at 37°C for 10 days. Control samples, taken from non-inflammatory cartilage, were cultured under the same conditions. The levels of NO-2 and NO-3 were measured in the supernatant using a spectrophotometric assay. The activity of MMP-1 was quantified by ELISA.
    The concentration of NO-x was 47.3 ± 4.1 µM in the OA cartilague and 10.7 ± 1.8 µM in the controls. The average MMP-1 activity was 3,650 ± 387 ng/ml More >

  • Open Access

    ARTICLE

    Extracellular matrix of ostrich articular cartilage

    TATIANA CARLA TOMIOSSO, LAURECIR GOMES, BENEDICTO DE CAMPOS VIDAL, EDSON ROSA PIMENTEL

    BIOCELL, Vol.29, No.1, pp. 47-54, 2005, DOI:10.32604/biocell.2005.29.047

    Abstract The composition and organization of the extracellular matrix of ostrich articular cartilage was investigated, using samples from the proximal and distal surfaces of the tarsometatarsus. For morphological analysis, sections were stained with toluidine blue and analyzed by polarized light microscopy. For biochemical analysis, extracellular matrix components were extracted with 4 M guanidinium chloride, fractionated on DEAE-Sephacel and analyzed by SDS-PAGE. Glycosaminoglycans were analyzed by electrophoresis in agarose gels. Structural analysis showed that the fibrils were arranged in different directions, especially on the distal surface. The protein and glycosaminoglycan contents of this region were higher than More >

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