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. 1994 Jun;120(6):354–358. doi: 10.1007/BF01247460

Inhibition of protein-kinase-C — dependent cell proliferation of human lung cancer cell lines by the dihydropyridine dexniguldipine

Hildegard M Schuller 1,✉, Michael Orloff 1, Gerd K Reznik 2
PMCID: PMC12201013  PMID: 8138560

Abstract

The dihydropyridine, dexniguldipine hydrochloride (B859-35), has shown therapeutic activity in experimentally induced neuroendocrine hamster lung tumors and demonstrated antiproliferative effects in a mammary cancer cell line via inhibition of Ca2+ calmodulin. Studies in NIH 3T3 fibroblasts have provided evidence that dexniguldipine may also inhibit protein kinase C (PCK). In this study, we have tested the hypothesis that dexniguldipine may inhibit the proliferation of lung cancer cells in response to autocrine or exogenous activation of PKC. Using a panel of human lung cancer cell lines, we show that dexniguldipine is a potent inhibitor of mitogenic signal transduction pathways dependent on PKC activation in several small-cell and non-small-cell lung cancer cell lines while it failed to inhibit cyclic-AMP-dependent cell proliferation.

Key words: Dexniguldipine, Lung cancer, Protein kinase C, Cell proliferation

Footnotes

Supported in part by grant R55 CA 51211-01A1 with the National Cancer Institute

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