J. Kerns et al., THIOALKYL DERIVATIVES OF VITAMIN-K-3 AND VITAMIN-K3-OXIDE INHIBIT GROWTH OF HEP3B AND HEPG2 CELLS, Bioorganic chemistry, 23(2), 1995, pp. 101-108
A new hypothesis regarding the effect of vitamin K-3 On hepatoma cell
growth is presented. In brief, exploration of cell growth activity has
been identified with the action of p34(cdc2) kinase and its associate
d protein tyrosine phosphatase. After exploring a series of substitute
d derivatives of vitamin K and vitamin K-3 oxide, we suggest a mechani
sm involving alkylation at the active-site cysteine for the inhibition
of the protein tyrosine phosphatase which controls the activity of th
e p34(cdc2) kinase. (C) 1995 Academic Press, Inc.