نوع مقاله : مقاله های پژوهشی
نویسندگان
1 استاد، گروه داروسازی بالینی و خدمات دارویی، دانشکدهی داروسازی و علوم دارویی، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران
2 استادیار، گروه بیوتکنولوژی دارویی، دانشکدهی داروسازی و علوم دارویی، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Background: Colistin, tigecycline and ampicillin/sulbactam (high dose) are the only antibiotics with high efficacy against Acinetobacter baumannii making them the last line of treatment. So, the investigation of new antimicrobial agents with potential activity against these pathogens is crucial. Antimicrobial peptides are natural agents that play an important role in innate immunity against various types of pathogens. In this project, the antimicrobial activity of TP4-LYC1, an antimicrobial peptide consisting of Tilapia Piscidin 4 (TP4) with lycosin-1, was investigated against resistant A. baumannii as well as the synergistic effects of this chimeric peptide with colistin and meropenem.
Methods: Optimization of the cleavage process for each peptides (TP4, LYC1, and TP4-LYC1) to obtain the maximum amount of peptides was performed based on the incubation temperature, time of incubation and the cleavage buffer pH. Finally, the antimicrobial effects of each peptide, alone or in combination with colistin or meropenem were analyzed by broth micro-dillusion and checker board methods, respectively.
Findings: The best conditions for cleaving TP4, were pH 6.5 with a 24 Hours incubation time. These conditions for LYC1 and the chimeric peptide were concluded as pH 4 with incubation time of 24 and 48 Hours, respectively. The antibacterial activity of TP4 was lower than TP4-LYC1 for each biological sample. Also, TP4-LYC1 exhibited synergistic effects with Meropenem and Colistin in most cases.
Conclusion: TP4-LYC1 shows potential as a candidate for the treatment of infections caused by A. baumanni in combination with routine effective antibiotics in order to reduce the dosage of these antibiotics.
کلیدواژهها [English]
https://www.neb.com/-/media/nebus/files/manuals/impact-twin-manual-e6950-708.pdf?rev=b5d93033cb034cba9987c836e30d3c4e&hash=1D202C22004B16D256C88047FAB2A3D5