“An earlier and more complete cytostatic response was observed in glioma cells which had been treated with the combination of 100 μM retinol and 5 mM difluoromethyl ornithine than in cells which had been treated with either agent alone.”
“ Difluoromethyl ornithine did not toally arrest tumor growth at concentrations of 5 mM; however, the antitumor effects were enhanced with the addition of retinol.”