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- W2021486524 abstract "Exogenous PGE2 stimulation of adenylate cyclase (AC) in intact and enzymatically dissociated micromass cultures of mesenchymal cells derived from the distal tip of stage 25 chick limb buds was examined over a six day period of culture. Responsiveness to PGE2 was measured in both dissociated and intact cell layers in an effort to determine if an inhibitory interaction occurred between PGE2 receptors and the extracellular matrix synthesized by differentiating chondrocytes. PGE2 responsiveness was maximal in both dissociated and intact prechondrogenic mesenchyme after 24 hours in culture and declined significantly as chondrocyte differentiation occurred on days 3 and 6. Equivalent activation of AC activity by PGE2 at each time point examined was noted in both cell groups. In contrast to the decreased responsiveness of differentiating chondrocytes to PGE2, stimulation of AC by forskolin resulted in increased levels of activity in differentiating chondrocytes of both cell groups between days 3–6. The results of the present study demonstrate that the decline in PGE2 responsiveness of differentiating chondrocytes most likely involves specific changes in the PGE2 receptor complex and not in either the interaction of the receptor with extracellular matrix components or a reduction in the available pool of AC present." @default.
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- W2021486524 title "Responsiveness of adenylate cyclase to PGE2 and forskolin in isolated cells from micromass cultures of chick limb mesenchyme during chondrogenesis" @default.
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- W2021486524 doi "https://doi.org/10.1016/0090-6980(90)90073-5" @default.
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