Cricchio; Arioli; Lancini, Farmaco, Edizione Scientifica, 1975, vol. 30, # 8, p. 605 - 619
作者:Cricchio、Arioli、Lancini
DOI:——
日期:——
Heterodimeric Rifampicin–Tobramycin conjugates break intrinsic resistance of Pseudomonas aeruginosa to doxycycline and chloramphenicol in vitro and in a Galleria mellonella in vivo model
作者:Temilolu Idowu、Gilbert Arthur、George G. Zhanel、Frank Schweizer
DOI:10.1016/j.ejmech.2019.04.034
日期:2019.7
Intrinsic resistance in Pseudomonas aeruginosa, defined by chromosomally encoded low outer membrane permeability and constitutively over-expressed efflux pumps, is a major reason why the pathogen is refractory to many antibiotics. Herein, we report that heterodimeric rifampicin-tobramycin conjugates break this intrinsic resistance and sensitize multidrug and extensively drug-resistant P. aeruginosa to doxycycline and chloramphenicol in vitro and in vivo. Tetracyclines and chloramphenicol are model compounds for bacteriostatic effects, but when combined with rifampicin-tobramycin adjuvants, their effects became bactericidal at sub MIC levels. Potentiation of tetracyclines correlates with the SAR of this class of drugs and is consistent with outer membrane permeabilization and efflux pump inhibition. Overall, this strategy finds new uses for old drugs and presents an avenue to expand the therapeutic utility of legacy antibiotics to recalcitrant pathogens such as P. aeruginosa. (C) 2019 Elsevier Masson SAS. All rights reserved.
Synthesis of Tridecaptin–Antibiotic Conjugates with in Vivo Activity against Gram-Negative Bacteria
作者:Stephen A. Cochrane、Xuefeng Li、Sisi He、Min Yu、Min Wu、John C. Vederas
DOI:10.1021/acs.jmedchem.5b01578
日期:2015.12.24
A series of tridecaptin-antibiotic conjugates were synthesized and evaluated for in vitro and in vivo activity against Gram-negative bacteria. Covalently linking unacylated tridecaptin A(1) (H-TriA(1)) to rifampicin, vancomycin, and erythromycin enhanced their activity in vitro but not by the same magnitude as coadministration of the peptide and these antibiotics. The antimicrobial activities of the conjugates were retained in vivo, with the H-TriA(1)-erythromycin conjugate proving a more effective treatment of Klebseilla pneumoniae infections in mice than erythromycin alone or in combination with H-TriA(1).
[EN] TIACUMICIN DERIVATIVES AND THEIR USE AS ANTIBIOTICS<br/>[FR] DÉRIVÉS DE TIACUMICINE ET LEUR UTILISATION EN TANT QU'ANTIBIOTIQUES
申请人:UNIV ZUERICH
公开号:WO2019135010A1
公开(公告)日:2019-07-11
The invention relates to a compound according to formula (1), wherein R1 to R4 and X are independently from each other a small functional group and R5 is -OH, or a moiety consisting of specific combinations of -L-, -Ra-, -Rb-, -Rd- and Re with L being an alkyl linker, Ra being carbonyl, carboxyl or carboxamide, Rb being a cyclic moiety, Rd being a polyether linker and Re being a small functional end group, fluorescent dye or antibiotic with the proviso that the compound is not fidaxomicin. Furthermore, the invention relates to the use of the compound in the treatment of disease and the use in treating infections and/or bacterial infections caused by drug resistant bacteria.
TIACUMICIN DERIVATIVES AND THEIR USE AS ANTIBIOTICS
申请人:Universität Zürich
公开号:EP3508492A1
公开(公告)日:2019-07-10
The invention relates to a compound according to formula (1)
wherein R1 to R4 and X are independently from each other a small functional group and R5 is -OH, or -O-Ln-Rap-Rbq-Lt-Rar-Rbs-Re, -O-Ln-Rbq-Rd-Lt-Rbs-Re with L being an alkyl linker, Ra being carbonyl, carboxyl or carboxamide, Rb being a cyclic moiety, Rd being a polyether linker and Re being a small functional end group, fluorescent dye or antibiotic with the proviso that the compound is not fidaxomicin.
Furthermore, the invention relates to the use of the compound in the treatment of disease and the use in treating infections and/or bacterial infections caused by drug resistant bacteria.