Abstract
In a previous paper, it was shown that the limb bud mesodermal cells differentiated into cartilage even at low cell density by lowering the serum content in the culture medium (Hattori & Ide, Exp cell res 150 (1984) 338) [20]. The present paper describes the effects of cAMP on limb bud chondrogenesis at low cell density. cAMP promoted chondrogenesis at low cell density in cultures with various concentrations of serum. The limb bud cells differentiated into cartilage cells without forming aggregates. cAMP inhibited the loss of chondrogenic capability in serum-rich medium. The relationship between cAMP level and serum content is also discussed.
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