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- W2766335780 abstract "There is a need to discover new therapeutic substances due to the emergence of deadly infectious diseases and various antibiotic resistance. We focused on the larvae that are utilized as a medical insect for the treatment of skin damage in Europe and America. This study was to investigate the pharmacological activities of novel antibacterial peptides isolated from Hermetia illucens larvae against the Klebsiella pneumoniae and Shigella dysenteriae. The larvae were immunized by probiotics (Lactobacillus casei) for 24 h. The hemolymph from the immunized larvae was fractionated through reverse-phase chromatography. Peptides were purified using HPLC and the coomassie blue staining, and identified using Nano-LC-ESI-MS/MS system. Antibacterial activities of the peptides were evaluated by turbidometric assay, liquid broth dilution assay, resazurin assay, and agar disk diffusion method. The minimum inhibitory concentrations (MICs) of the peptides were measured as 150 μg/mL through the turbidometric, liquid broth dilution, and resazurin assays. The peptides effectively inhibited their growth/proliferation as well as the survival rate of the tested bacteria. Furthermore, the immunized larvae exhibited overexpression of the peptides compared to non-immunized larvae. These results demonstrate that the peptides induced by H. illucens exert strong antibacterial activity against Gram-negative bacteria. The results suggest that the activation of the humoral immunity induced by immunization functioned to enhance the production of antibacterial peptides from the insect and their antibacterial properties. This study indicates the potential of the peptides produced from larvae as antibacterial peptide substance for the development of novel antibacterial drugs." @default.
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- W2766335780 date "2017-10-16" @default.
- W2766335780 modified "2023-10-03" @default.
- W2766335780 title "Novel antibacterial peptides induced by probiotics in<i>Hermetia illucens</i>(Diptera: Stratiomyidae) larvae" @default.
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- W2766335780 doi "https://doi.org/10.1111/1748-5967.12259" @default.
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