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Title: | Peptide extract from olivancillaria hiatula exhibits broad-spectrum antibacterial activity |
Issue Date: | 23-Dec-2018 |
Publisher: | Hindawi |
Abstract: | Increasing reports of infectious diseases worldwide have become a global concern in recent times. Depleted antibiotic pipelines,
rapid and complex cases of antimicrobial resistance, and emergence and re-emergence of infectious disease have necessitated
an urgent need for the development of new antimicrobial therapeutics, preferably with novel modes of action. Due to their
distinct mode of action, antimicrobial peptides ofer an interesting alternative to conventional antibiotics to deal with the problems
enumerated. In this study, the antimicrobial potential of the peptide extract from the marine mollusc, Olivancillaria hiatula, was
evaluated in vitro. Agar difusion and broth dilution techniques were used to evaluate microbial susceptibility to the peptide extract.
Microplate-based assays were also used to investigate time-dependent growth inhibition profles of microbes in the presence of
peptide and evaluate the peptide’s ability to modulate the activities of standard antibiotics. Both Gram-positive and Gram-negative
bacteria were inhibited by the peptide extract in the agar difusion assay. Te minimum inhibitory concentration (MIC) of peptide
against test microorganisms was between 0.039 and 2.5 mg/mL. At the MIC, the peptide extract was bacteriostatic towards all
tested microorganisms but bactericidal to Staphylococcus aureus. In the presence of the peptide extract, a prolonged lag phase was
observed for all microbes, similar to standard ciprofoxacin.When administered together, peptide extracts enhanced the activities of
ciprofoxacin and cefotaxime and were antagonistic towards erythromycin but indiferent towards metronidazole. Taken together,
these results show the broad-spectrum antibacterial activity of peptide extract from Olivancillaria hiatula and demonstrate that
antimicrobial peptides can be employed in combination with some conventional antibiotics for improved efects. |
Description: | An article published by Hindawi and also available at
https://doi.org/10.1155/2018/6010572 |
URI: | http://hdl.handle.net/123456789/12924 |
Appears in Collections: | College of Health Sciences
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