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- W2008356473 abstract "Abstract The effect of retinoic acid on glycosaminoglycan biosynthesis was investigated in rat costal cartilage chondrocytes in vitro. At levels of 10−9 to 10−8 m retinoic acid, 35SO4 uptake into glycosaminoglycans was reduced 50%. At these low levels of retinoic acid there was no evidence of lysosomal enzyme release. The results are explained best in terms of modification of glycosaminoglycan synthesis, rather than accelerated degradation. Retinoic acid selectively modified the incorporation of 35SO4 or [14C]glucosamine into individual glycosaminoglycans fractions under the conditions studied. The relative incorporation of radiolabeled precursor into heparan sulfate (and/or) heparin increased three- to fourfold. The relative incorporation of radiolabeled precursor remained constant for chondroitin 6-sulfate, whereas incorporation into chondroitin 4-sulfate and chondroitin (and/or) hyaluronic acid decreased. Under the conditions studied, retinoic acid did not appear to be cytotoxic and did exhibit selective control over glycosaminoglycan biosynthesis. It is suggested that the decreased incorporation of 35SO4 into glycosaminoglycans at hypervitaminosis A levels of retinol may be accounted for by the presence of low levels of retinoic acid, a naturally occurring metabolite." @default.
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- W2008356473 title "Effect of retinoic acid on chondrocyte glycosaminoglycan biosynthsis" @default.
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- W2008356473 doi "https://doi.org/10.1016/0003-9861(76)90325-8" @default.
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