Center for Tuberculosis Research, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
Antimicrob Agents Chemother. 2013 Oct;57(10):5138-40. doi: 10.1128/AAC.00918-13. Epub 2013 Jul 15.
Mycobactin biosynthesis in Mycobacterium tuberculosis facilitates iron acquisition, which is required for growth and virulence. The mycobactin biosynthesis inhibitor salicyl-AMS [5'-O-(N-salicylsulfamoyl)adenosine] inhibits M. tuberculosis growth in vitro under iron-limited conditions. Here, we conducted a single-dose pharmacokinetic study and a monotherapy study of salicyl-AMS with mice. Intraperitoneal injection yielded much better pharmacokinetic parameter values than oral administration did. Monotherapy of salicyl-AMS at 5.6 or 16.7 mg/kg significantly inhibited M. tuberculosis growth in the mouse lung, providing the first in vivo proof of concept for this novel antibacterial strategy.
分枝杆菌(mycobacterium)中的分枝菌酸(mycobactin)生物合成有助于铁的获取,而铁是生长和毒力所必需的。分枝菌酸生物合成抑制剂水杨酰基-AMS[5'-O-(N-水杨酰基磺酰胺基)腺苷]可在铁限制条件下抑制结核分枝杆菌的体外生长。在这里,我们用小鼠进行了水杨酰基-AMS 的单次剂量药代动力学研究和单药治疗研究。腹腔注射比口服给药产生更好的药代动力学参数值。以 5.6 或 16.7mg/kg 的剂量单用水杨酰基-AMS 治疗可显著抑制小鼠肺部的结核分枝杆菌生长,为这一新的抗菌策略提供了首个体内概念验证。