Synergistic antibiotic effect of looped antimicrobial peptide CLP-19 with bactericidal and bacteriostatic agents.

Synergistic antibiotic effect of looped antimicrobial peptide CLP-19 with bactericidal and bacteriostatic agents.
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环状抗菌肽CLP-19与杀菌、抑菌剂的协同抗菌作用

DOI:
10.18632/oncotarget.18124
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发表时间:
2017-08-22
期刊:
影响因子:
--
通讯作者:
Xia P
Xia P
中科院分区:
其他
文献类型:
--
作者:
Li D;Yang Y;Tian Z;Lv J;Sun F;Wang Q;Liu Y;Xia P

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耐药感染的治疗是复杂的,传染病的惊人增长对制定有效的治疗战略提出了独特的挑战。抗生素诱导的细菌内毒素脂多糖(LPS)的释放可能会立即产生不良反应,促进患者的感染性休克。在本研究中,我们首先证实了我们之前的发现,即环状抗菌肽CLP-19具有非特异性的直接抗菌活性,对哺乳动物细胞没有毒性,其次揭示了CLP-19具有协同作用,可以增强其他常规杀菌剂(氨苄西林和头孢他啶)和抑菌剂(红霉素和左氧氟沙星)的抗菌活性。第三,抗生素作用的潜在机制可能与刺激羟基自由基的产生有关。最后,CLP-19被证明可以通过直接中和LPS有效地减少抗生素诱导的LPS释放。因此,CLP-19是一种潜在的抗生素联合治疗药物。
The treatment of drug-resistant infections is complicated and the alarming rise in infectious diseases poses a unique challenge for development of effective therapeutic strategies. Antibiotic-induced liberation of the bacterial endotoxin lipopolysaccharide (LPS) may have immediate adverse effects promoting septic shock in patients. In the present study, we first confirmed our previous finding that looped antimicrobial peptide CLP-19 exerts non-specific direct antibacterial activity with no toxic to mammalian cells and second revealed that CLP-19 has synergistic effect to enhance the antibacterial activities of other conventional bactericidal (ampicillin and ceftazidime) and bacteriostatic (erythromycin and levofloxacin) agents. Third, the underlying mechanism of antibiotic effect was likely associated with stimulation of hydroxyl radical generation. Lastly, CLP-19 was shown to effectively reduce the antibiotic-induced liberation of LPS, through direct neutralization of the LPS. Thus, CLP-19 is a potential therapeutic agent for combinatorial antibiotic therapy.
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