The modulation of growth by HMBA in PKC overproducing HT29 colon cancer cells.
To examine whether protein kinase C (PKC) plays a role in mediating growth inhibitory effects of hexamethylene bisacetamide (HMBA) we compared a control H29 colon cancer cell line to a derivative, HT29-PKC7, that overexpresses high levels of PKC beta 1. We found that although HMBA markedly inhibited the growth of the control cells, no inhibition was seen with the HT29-PKC7 cells. On the other hand the tumor promoter 12-0-tetradecanoyl-phorbol-13 acetate inhibited the growth of HT29-PKC7 cells, but no inhibition was seen with the control cells. Maximum inhibition of the growth of both cell lines was obtained by combined treatment with HMBA and TPA. These results may be relevant to the use of HMBA in combination with other agents in the therapy of specific cancers.[1]References
- The modulation of growth by HMBA in PKC overproducing HT29 colon cancer cells. Choi, P.M., Weinstein, I.B. Biochem. Biophys. Res. Commun. (1991) [Pubmed]
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