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1998:
Yang M S; Chang S H; Sonn J K; Lee Y S; Kang S S; Park T K; Chun J S
Regulation of chondrogenic differentiation of mesenchymes by protein kinase C alpha.
Molecules and cells 1998;
8(
3):.
Chondrogenesis of chick limb bud mesenchymes requires the expression and activation of protein kinase C (PKC). This study was performed to identify PKC isoform(s) involved in the regulation chondrogenic differentiation of mesenchymes. Multiple PKC isoforms including alpha, epsilon, zeta and lambda/iota were expressed in mesenchymes derived from chick limb buds. Among the expressed PKC isoforms, the levels of PKC alpha and epsilon were increased during chondrogenic differentiation of mesenchymes. The increase in the expression of these isoforms is more evident in the particulate membrane fraction compared with the cytosolic fraction. Chondrogenesis was blocked by either selective inhibition or down-regulation of PKC alpha. In addition, the degree of chondrogenesis was closely correlated with the expression levels of PKC alpha but not other PKC isoforms expressed in mesenchymes. Thus, the results indicate that only PKC alpha is required for the induction of chondrogenic differentiation
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