[en] Human chondrocytes from the pelvic joint were cultivated in suspension; under these conditions, after a few days, cells aggregated. These chondrocytes were morphologically differentiated (round shape, situated inside cavities and surrounded by a matrix synthesized during cultivation) and biosynthetically differentiated (synthesis of type II collagen and cartilage proteoglycans (PG) (Bassleer et al. In vitro 22, 115-120, 1986). In this work, we present the metabolic and cellular effects of a peptidic-glycosaminoglycan (P-GAG) complex isolated from calf cartilage and bone marrow. We analyzed the effects of P-GAG on DNA synthesis (appreciated by 3H-thymidine incorporation into DNA), on type II collagen and on PG synthesis analyzed by specific radioimmunoassays. According to its final concentration in culture medium, P-GAG was able to stimulate proliferation or to favor the production of specific components of cartilage matrix, type II collagen and PG.
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