The Journal of antimicrobial chemotherapy · 2010
In vitro antimicrobial activities of capuramycin analogues against non-tuberculous mycobacteria.
СтатьяПоддержка NIH: внешняя программаНазвание и аннотация: Перевод в очереди
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Dubuisson Tia, Bogatcheva Elena, Krishnan Manju Y, Collins Michael T, Einck Leo, Nacy Carol A, Reddy Venkata M
Аннотация
OBJECTIVES: To determine antibacterial activity of capuramycin analogues SQ997, SQ922, SQ641 and RKS2244 against several non-tuberculous mycobacteria (NTM).
METHODS: In vitro antibiotic activities, i.e. MIC, MBC, rate of killing and synergistic interaction with other antibiotics, were evaluated.
RESULTS: SQ641 was the most active compound against all the NTM species studied. The MIC of SQ641 was ≤0.06-4 mg/L for Mycobacterium avium complex (MAC; n = 20), 0.125-2 mg/L for M. avium paratuberculosis (MAP; n = 9), 0.125-2 mg/L for Mycobacterium kansasii (MKN;n = 2), 0.25-1 mg/L for Mycobacterium abscessus (MAB; n = 11), 4 mg/L for Mycobacterium smegmatis (MSMG; n = 1), and 1 and 8 mg/L for Mycobacterium ulcerans (MUL; n = 1), by microdilution and agar dilution methods, respectively. SQ641 was bactericidal against NTM, with an MBC/MIC ratio of 1 to 32, and killed all mycobacteria faster than positive control drugs for each strain. In chequerboard titrations, SQ641 was synergistic with ethambutol against both MAC and MSMG, and was synergistic with streptomycin and rifabutin against MAB.
CONCLUSIONS: In vitro, SQ641 was the most potent of the capuramycin analogues against all NTM tested, both laboratory and clinical strains.
METHODS: In vitro antibiotic activities, i.e. MIC, MBC, rate of killing and synergistic interaction with other antibiotics, were evaluated.
RESULTS: SQ641 was the most active compound against all the NTM species studied. The MIC of SQ641 was ≤0.06-4 mg/L for Mycobacterium avium complex (MAC; n = 20), 0.125-2 mg/L for M. avium paratuberculosis (MAP; n = 9), 0.125-2 mg/L for Mycobacterium kansasii (MKN;n = 2), 0.25-1 mg/L for Mycobacterium abscessus (MAB; n = 11), 4 mg/L for Mycobacterium smegmatis (MSMG; n = 1), and 1 and 8 mg/L for Mycobacterium ulcerans (MUL; n = 1), by microdilution and agar dilution methods, respectively. SQ641 was bactericidal against NTM, with an MBC/MIC ratio of 1 to 32, and killed all mycobacteria faster than positive control drugs for each strain. In chequerboard titrations, SQ641 was synergistic with ethambutol against both MAC and MSMG, and was synergistic with streptomycin and rifabutin against MAB.
CONCLUSIONS: In vitro, SQ641 was the most potent of the capuramycin analogues against all NTM tested, both laboratory and clinical strains.