Synthesis of novel porphyrin-based lipids and their antibacterial activity
摘要:
The purpose of this study was to investigate the antibacterial activity of newly developed cationic amphiphilic lipids having porphyrin as head group against two types of gram-positive bacteria and three types of gram-negative bacteria. The antibacterial activity of quantitatively prepared porphyrin-based amphiphilic lipids is evaluated by the disc-diffusion method against Staphylococcus aureus, Bacillus subtilis, Escherichia coli, Klebsiella pneumoniae and Proteus vulgaris. These results are compared with the standard antibacterial activity of chloramphenicol. Both lipids showed antibacterial behaviour against gram-positive and gram-negative bacteria.
[EN] LIPOPHILIC AND/OR LYTIC PEPTIDES FOR SPECIFIC DELIVERY OF NUCLEIC ACIDS TO CELLS<br/>[FR] PEPTIDES LIPOPHILES ET/OU LYTIQUES PERMETTANT L'APPORT SPECIFIQUE D'ACIDES NUCLEIQUES A DES CELLULES
申请人:GENEMEDICINE, INC.
公开号:WO1998050078A1
公开(公告)日:1998-11-12
(EN) The invention relates in part to molecular complexes for delivering macromolecules (e.g., nucleic acid molecules) into cells. These molecular complexes can comprise lipophilic peptides that condense and stabilize the macromolecule. These lipophilic binding peptides can also comprise moieties that target the macromolecule to specific cells in an organism. In addition, the molecular complexes can comprise lipophilic peptides that can lyse endosomal structures within cells and thereby enhance delivery of the macromolecule into cells. The invention also relates in part to methods of delivering macromolecules to cells using the molecular complexes described herein. Thus, the present invention provides for efficient and specific delivery of nucleic acid molecules into cells.(FR) L'invention concerne des complexes moléculaires permettant l'apport de macromolécules (p.ex. molécules d'acide nucléique) à des cellules. Ces complexes moléculaires peuvent comprendre des peptides lipophiles qui condensent et stabilisent la macromolécule. Ces peptides liants lipophiles peuvent également comporter des fractions qui acheminent la macromolécule de façon ciblée vers des cellules spécifiques de l'organisme. Les complexes moléculaires peuvent également comprendre des peptides lipophiles pouvant entraîner la lyse de structures endosomales internes aux cellules et augmenter ainsi l'apport de macromolécules à l'intérieur des cellules. L'invention concerne également des procédés permettant l'apport de macromolécules à des cellules à l'aide des complexes moléculaires décrits. La présente invention assure ainsi l'apport efficace et spécifique de molécules d'acide nucléique dans les cellules.