A Novel Class of Cationic and Non-Peptidic Small Molecules as Hits for the Development of Antimicrobial Agents
作者:Aranza Jiménez、Pablo García、Sofia de la Puente、Andrés Madrona、María Camarasa、María-Jesús Pérez-Pérez、José-Carlos Quintela、Francisco García-del Portillo、Ana San-Félix
DOI:10.3390/molecules23071513
日期:——
Cationic and non-peptide small molecules containing a total of six positive charges arranged on one side and a long aliphatic tail on the other have been synthesized and tested against Gram-positive and Gram-negative bacteria. The positive charges have been contributed by two aminophenol residues. These molecules have showed remarkable antimicrobial activity against Gram-positive bacteria including multidrug-resistant strains. Our structure–activity relationship studies demonstrated the importance of the length and flexibility of the hydrophobic tail for the antimicrobial activity. Importantly, these compounds are non-toxic to eukaryotic cells at the concentration affecting growth in bacteria, reflecting an acceptable margin of safety. The small size and easy synthetic accessibility of our molecules can be of interest for the further development of novel antimicrobials against Gram-positive bacterial pathogens, including multidrug-resistant strains.
Head Group Analogs of Arachidonylethanolamide, the Endogenous Cannabinoid Ligand
作者:Atmaram D. Khanolkar、Vasiliki Abadji、Sonyuan Lin、W. Adam G. Hill、Gihan Taha、Khaled Abouzid、Zhaoxing Meng、Pusheng Fan、Alexandros Makriyannis
DOI:10.1021/jm960152y
日期:1996.1.1
carbonyl oxygen by a sulfur atom had a detrimental effect on the CB1 affinity. The thio analogs of both anandamide and (R)-methanandamide showed very weak affinity for CB1. The secondary nature of the amidic nitrogen was also shown to be important for affinity, indicating a possible hydrogen-bondinginteraction between the amide NH and the receptor. Introduction of a phenolic moiety in the head group