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• W3134522229 endingPage "105784" @default.
• W3134522229 startingPage "105784" @default.
• W3134522229 abstract "• A 21-mer antimicrobial peptide sequence was designed which exhibited dual antimicrobial and anticancer activity. • The peptide exerted significant antimicrobial activity against drug resistant Pseudomonas aeruginosa primarily by disrupting the biological membrane. • It also demonstrated notable anticancer activity with minimal haemolytic potential. Antimicrobial peptides (AMPs) are increasingly sought-after and researched antimicrobial agents due to its desired pharmacological properties and the continuous diminishing efficacy of antibiotics. In addition to this line of research, the aim of the present study is to determine the antimicrobial and anticancer activity of a de novo designed α-helical peptide. Circular dichroism showed 100% helical nature of the peptide in 10 mM SDS. Notably, the peptide exerted significant antimicrobial activity against the reference and antibiotic-resistant clinical isolates belonging to Pseudomonas sp. at a MIC and MBC of 2 and 8 μM, respectively. The progressive disruption and disturbance of cell membrane in the overall topography was observed in the scanning electron microscopy (SEM) micrographs of Pseudomonas aeruginosa ATCC 27853 treated with the peptide as compared to untreated control. The results of time–kill kinetics showed complete lysis at 3x MIC after 50 min of incubation of the microbe with the peptide. Moreover, the peptide did not lyse human RBCs even at the highest concentration of the peptide (10 mM) and retained its activity upon treatment at 0.5 mg/ml trypsin. Cancer cell lines, viz. A549 and MCF-7 were also found to be sensitive to peptide activity showing 50% reduction in survivability at 4 and 2 μM, respectively; however, L929 cells were unaffected. Drastic membrane permeability and necrotic mode of lysis of peptide-treated-A549 cells were affirmed by propidium iodide and live/dead cell staining. The results showed that the designed peptide could be an efficient drug molecule for clinical studies subjected to successful experiments on animal models." @default.
• W3134522229 created "2021-03-15" @default.
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• W3134522229 date "2021-06-01" @default.
• W3134522229 modified "2023-10-16" @default.
• W3134522229 title "Dual antimicrobial and anticancer activity of a novel synthetic α-helical antimicrobial peptide" @default.
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• W3134522229 doi "https://doi.org/10.1016/j.ejps.2021.105784" @default.
• W3134522229 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33677023" @default.
• W3134522229 hasPublicationYear "2021" @default.
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