申请人:Hoffman Paul S.
公开号:US20130317070A1
公开(公告)日:2013-11-28
The invention provides for the use of antimicrobial chemical entities based on a nitrothiazolide backbone that exhibit anti-mycobacteria activity, including the mycobacterium causing tuberculosis. Multiple compounds were synthesized and screened for anti-tuberculosis activity. Disclosed herein are a series of compounds with anti-tuberculosis activity, including six leads that completely inhibited bacterial growth at 5 micrograms per ml or less. Three of these compounds were tested to determine MIC and these ranged between 1 and 4 micrograms per ml against both drug susceptible
Mycobacterium tuberculosis
strains and strains that are multi-drug resistant (MDR) including XDR strains. The compounds developed are derived from parent compound nitazoxanide, which had no inhibitory activity in the stringent testing format used herein. The derivatives were synthesized using a di-nitro-thiophene or 4-Chloro-5-Nitro-thiazole scaffold and R groups connected via a peptide bond (NHCO) to cyclic compounds such as benzene, thiophene or furans. Many of these compounds have broad spectrum activity against Gram positive bacteria including
Staphylococcus aureus
(MRSA) and
Staphylococcus epidermidis
. Several of these lead compounds were not toxic for mice at 200 mg/Kg doses administered over a period of three days.
本发明提供了基于硝基噻唑骨架的抗微生物化学实体的使用,其表现出抗分枝杆菌活性,包括导致结核病的分枝杆菌。多种化合物被合成并筛选以寻找抗结核病活性。本文披露了一系列具有抗结核病活性的化合物,包括六个引物,其在5微克/毫升或更低浓度下完全抑制了细菌生长。其中三种化合物被测试以确定MIC,这些化合物对药物敏感的结核分枝杆菌菌株和多重耐药(MDR)菌株(包括XDR菌株)的MIC范围在1至4微克/毫升之间。开发的化合物来源于父化合物硝唑酮,该化合物在本文所使用的严格测试格式中没有抑制活性。这些衍生物是使用二硝基噻吩或4-氯-5-硝基噻唑支架和连接到环化合物(如苯、噻吩或呋喃)的R基通过肽键(NHCO)合成的。其中许多化合物对革兰氏阳性细菌具有广谱活性,包括金黄色葡萄球菌(MRSA)和表皮葡萄球菌。其中几种引物化合物在3天内以200毫克/千克的剂量给小鼠注射时没有毒性。