Abstract

The effects of vitamin E (vit.E, d-alpha-tocopherol acid succinate) on the growth and the morphological differentiation of 4 representative murine neuroblastoma cell lines: C1300 (wild type), NS-20 (cholinergic type), N-18 (inactive type), N1E-115 (adrenergic type), and the combined effects of vit.E and cis-diamminedichloroplatinum(II)(cisplatin, CDDP) were studied in culture. Vitamin E inhibited the growth of all clonal cells in a dose-dependent manner, especially that of NS-20 cells, and it caused significant morphological differentiation only in NS-20 cells. In addition, vit.E enhanced the growth inhibition of C1300 cells by cisplatin in an additive manner, but not that of NS-20 cells. These suggested that both phenomena induced by vit.E may not always occur in parallel in each clonal neuroblastoma, and both mechanisms might be different.

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