Multiple Mechanisms of the Synthesized Antimicrobial Peptide TS against Gram-Negative Bacteria for High Efficacy Antibacterial Action In Vivo |
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| Authors: | Rui Zhang Xiaobo Fan Xinglu Jiang Mingyuan Zou Han Xiao Guoqiu Wu |
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| Institution: | 1.Medical School, Southeast University, Nanjing 210009, China; (R.Z.); (X.F.); (X.J.); (M.Z.); (H.X.);2.Jiangsu Provincial Key Laboratory of Critical Care Medicine, Southeast University, Nanjing 210009, China;3.Department of Clinical Laboratory Medicine, Zhongda Hospital, Southeast University, Nanjing 210009, China |
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| Abstract: | The emergence of drug-resistant bacteria emphasizes the urgent need for novel antibiotics. The antimicrobial peptide TS shows extensive antibacterial activity in vitro and in vivo, especially in gram-negative bacteria; however, its antibacterial mechanism is unclear. Here, we find that TS without hemolytic activity disrupts the integrity of the outer bacterial cell membrane by displacing divalent cations and competitively binding lipopolysaccharides. In addition, the antimicrobial peptide TS can inhibit and kill E. coli by disintegrating the bacteria from within by interacting with bacterial DNA. Thus, antimicrobial peptide TS’s multiple antibacterial mechanisms may not easily induce bacterial resistance, suggesting use as an antibacterial drug to be for combating bacterial infections in the future. |
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| Keywords: | antibacterial activity membrane interaction lipopolysaccharide bacterial DNA |
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