Mycobacterium tuberculosis sterilizing activity of faropenem, pyrazinamide and linezolid combination and failure to shorten the therapy duration.

Mycobacterium tuberculosis sterilizing activity of faropenem, pyrazinamide and linezolid combination and failure to shorten the therapy duration.
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DOI:
10.1016/j.ijid.2021.01.062
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发表时间:
2021-03
期刊:
International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases
影响因子:
--
通讯作者:
Srivastava S
Srivastava S
中科院分区:
其他
文献类型:
--
作者:
Gumbo T;Sherman CM;Deshpande D;Alffenaar JW;Srivastava S

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Faropenem (F) 是一种口服生物可利用的 β-内酰胺,无需 β-内酰胺酶抑制剂的帮助即可杀死结核分枝杆菌 (Mtb)。本研究探讨了在利奈唑胺 (L) 加吡嗪酰胺 (Z) 主干方案中每天添加一次或两次 F 的灭菌效果。使用结核病中空纤维模型(HFS-TB)进行体外研究,比较以下药物的杀灭率: 1)ZL 两种药物组合; 2) F每日一次加ZL (F1ZL); 3) F 每日两次加每日一次 ZL (F2ZL); 4)F2ZL与高剂量Z(F2ZhiL); 5)异烟肼、利福平和Z的标准治疗; 6) 未经处理的对照。该研究进行了 56 天,每个方案重复 3 次 HFS-TB。未经治疗的 HFS-TB 中的 Mtb 以 0.018 ± 0.007 log10 CFU/mL/天的速率生长。标准疗法的指数杀灭率比 ZL 双疗法高 6.6-13.2 倍。 F1ZL和F2ZL方案排名第三。在未经治疗的 HFS-TB 中,接种物中预先存在的异烟肼耐药亚群 (1.34 ± 0.57 log10 CFU/mL) 在 56 天内增长至 4.21 ± 0.58 log10 CFU/mL。然而,在任何 FZL 联合方案中均未记录到异烟肼耐药亚群。由于与标准治疗相比杀灭率较慢,FZL 方案不太可能缩短治疗持续时间。需要确定这些治疗方案对抗耐药结核病的疗效。
Faropenem (F), an orally bioavailable β-lactam, kills Mycobacterium tuberculosis (Mtb) without the help of a β-lactamase inhibitor. This study explored the sterilizing effect of adding F once or twice daily to a linezolid (L) plus pyrazinamide (Z) backbone regimen. In vitro studies were performed using the hollow fiber model of tuberculosis (HFS-TB) to compare the kill rates of: 1) ZL two-drug combination; 2) F administered once daily plus ZL (F1ZL); 3) F administered twice-daily plus once daily ZL (F2ZL); 4) F2ZL with high-dose Z (F2ZhiL); 5) standard therapy of isoniazid, rifampin and Z; and 6) non-treated controls. The study was performed over 56 days with three HFS-TB replicates for each regimen. Mtb in the non-treated HFS-TB grew at a rate of 0.018 ± 0.007 log10 CFU/mL/day. The exponential kill rates for standard therapy were 6.6–13.2-fold higher than ZL dual therapy. The F1ZL and F2ZL regimens ranked third. The pre-existing isoniazid-resistant sub-population in the inoculum (1.34 ± 0.57 log10 CFU/mL) grew to 4.21 ± 0.58 log10 CFU/mL in 56 days in non-treated HFS-TB. However, no isoniazid-resistant sub-population was recorded in any of the FZL combination regimens. Due to the slow kill rate compared to standard therapy, FZL regimens are unlikely to shorten therapy duration. Efficacy of these regimens against drug-resistant tuberculosis needs to be determined.
Ceftazidime-avibactam对高度耐药性结核病具有有效的消毒活性。
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