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Synthesis and Characterization of Novel Amphiphilic -Benzyl 1,4-Dihydropyridine Derivatives-Evaluation of Lipid Monolayer and Self-Assembling Properties

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Publisher MDPI
Date 2023 Jun 28
PMID 37374390
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Abstract

Liposomes and other nanoparticles have been widely studied as innovative nanomaterials because of their unique properties. Pyridinium salts, on the basis of 1,4-dihydropyridine (1,4-DHP) core, have gained significant attention due to their self-assembling properties and DNA delivery activity. This study aimed to synthesize and characterize original -benzyl substituted 1,4-dihydropyridines and evaluate the influence on structure modifications on compound physicochemical and self-assembling properties. Studies of monolayers composed of 1,4-DHP amphiphiles revealed that the mean molecular areas values were dependent on the compound structure. Therefore, the introduction of -benzyl substituent to the 1,4-DHP ring enlarged the mean molecular area by almost half. All nanoparticle samples obtained by ethanol injection method possessed positive surface charge and average diameter of 395-2570 nm. The structure of the cationic head-group affects the size of the formed nanoparticles. The diameter of lipoplexes formed by 1,4-DHP amphiphiles and mRNA at nitrogen/phosphate (N/P) charge ratios of 1, 2, and 5 were in the range of 139-2959 nm and were related to the structure of compound and N/P charge ratio. The preliminary results indicated that more prospective combination are the lipoplexes formed by pyridinium moieties containing -unsubstituted 1,4-DHP amphiphile and pyridinium or substituted pyridinium moieties containing -benzyl 1,4-DHP amphiphiles - at N/P charge ratio of 5, which would be good candidates for potential application in gene therapy.

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