SYNTHETIC PYRIDOPURINES DERIVED FROM FOOD PYROLYSIS PRODUCTS - INTERCALATION, INTERACTIONS WITH MEMBRANES, CYCLODEXTRIN COMPLEXATION, AND BIOLOGICAL MITOGENIC PROPERTIES

Crucial conditions for the pharmacological use of active compounds are their ability to cross the biological barriers and reach their intrac ellular target. In the case of two antiviral pyridopurine derivatives, 1 and 2, this included essentially the membranes and the nucleic acid s. Thus the interactions of 1 and 2 with model membranes and oligonucl eotides were studied using NMR spectroscopy. It was found that these h ydrophobic molecules can be incorporated into the model membranes at t he terminal methyl group level, inducing dynamic perturbations in the bilayer. In the presence of the synthetic oligonucleotide ACATGT, both molecules can intercalate aspecifically in AT and GC systems. Inclusi on complexes of 1 and 2 in beta-cyclodextrins with a 1:1 stoichiometry were also prepared. This led us to propose two galenic forms of 1 and 2, i.e. included in phospholipid vesicles or in the form of a beta- c yclodextrin complex.