POLYBASIC BACTERIAL EFFLUX PUMP INHIBITORS AND THERAPEUTIC USES THEREOF
申请人:GLINKA TOMASZ
公开号:US20080318957A1
公开(公告)日:2008-12-25
Disclosed are compounds having polybasic functionalities. The compounds inhibit bacterial efflux pump inhibitors and are used in combination with an anti-bacterial agent to treat or prevent bacterial infections. These combinations can be effective against bacterial infections that have developed resistance to anti-bacterial agents through an efflux pump mechanism.
Relative Quantification of Carboxylic Acid Metabolites by Liquid Chromatography−Mass Spectrometry Using Isotopic Variants of Cholamine
作者:Shane M. Lamos、Michael R. Shortreed、Brian L. Frey、Peter J. Belshaw、Lloyd M. Smith
DOI:10.1021/ac062416m
日期:2007.7.1
Labeling reagents that differ only in their isotopic composition offer a powerful approach to achieve relative quantification between samples by ESI-MS. Heavy and light isotopic forms of cholamine, which contain a positively charged quaternary ammonium group, were synthesized and tested as new labeling reagents for the relative quantification of carboxylic acid-containing metabolites, specifically fatty acids. The positive charge on cholamine ensures that the labeled product is also positively charged under all LC−MS conditions, regardless of mobile-phase pH. This leads to high ionization efficiency and correspondingly high detection sensitivity, demonstrated here for the analysis of fatty acids in positive ion mode ESI-MS after reversed-phase separation under acidic conditions. Good accuracy and precision were obtained by mixing heavy- and light-labeled hydrolyzed egg lipid extracts in different known ratios. The relative quantification results for 10 observed fatty acids had an average absolute error of 4.6% and an average coefficient of variation (CV) of 2.6%. The labeling strategy yielded a median CV of 6% when employed for fatty acid analysis of eggs from chickens fed various dietary supplements.
[EN] POLYBASIC BACTERIAL EFFLUX PUMP INHIBITORS AND THERAPEUTIC USES THEREOF<br/>[FR] INHIBITEURS DE POMPES À EFFLUX BACTÉRIENNES POLYBASIQUES ET LEURS UTILISATIONS THÉRAPEUTIQUES
申请人:MPEX PHARMACEUTICALS INC
公开号:WO2008141010A2
公开(公告)日:2008-11-20
[EN] Disclosed are compounds having polybasic functionalities. The compounds inhibit bacterial efflux pump inhibitors and are used in combination with an anti-bacterial agent to treat or prevent bacterial infections. These combinations can be effective against bacterial infections that have developed resistance to anti-bacterial agents through an efflux pump mechanism. [FR] L'invention concerne des composés présentant des fonctionnalités polybasiques. Ces composés sont des inhibiteurs de pompes à efflux bactériennes et sont utilisés en combinaison avec un agent antibactérien pour traiter ou prévenir des infections bactériennes. Ces combinaisons peuvent être efficaces contre les infections bactériennes ayant développé une résistance contre des agents antibactériens par mise en oeuvre d'un mécanisme de pompe à efflux.
[EN] POLYBASIC BACTERIAL EFFLUX PUMP INHIBITORS AND THERAPEUTIC USES THEREOF<br/>[FR] INHIBITEURS POLYBASIQUES DE POMPE À EFFLUX BACTÉRIENNE ET LEURS UTILISATIONS THÉRAPEUTIQUES
申请人:MPEX PHARMACEUTICALS INC
公开号:WO2010054102A2
公开(公告)日:2010-05-14
Disclosed are compounds having polybasic functionalities. The compounds inhibit bacterial efflux pump inhibitors and are used in combination with an anti-bacterial agent to treat or prevent bacterial infections. These combinations can be effective against bacterial infections that have developed resistance to anti-bacterial agents through an efflux pump mechanism.