A pleurocidin analogue with greater conformational flexibility, enhanced antimicrobial potency and in vivo therapeutic efficacy.

Journal article

Manzo, G., Hind, C.K, Ferguson, P.M, Amison, R.T, Hodgson-Casson, A., Ciazynska, K.A., Weller, B.J, Clarke, M., Lam, C., Man, R.C ., O'Shaughnessy, B.G., Clifford, M., Bui, T., Drake, Alex F, Atkinson, R., Lam, J., Pitchford, S.C, Page, C.P, Phoenix, D.A, Lorenz, C., Sutton, J. and Mason, A. (2020). A pleurocidin analogue with greater conformational flexibility, enhanced antimicrobial potency and in vivo therapeutic efficacy. Communications biology. 3 (1), p. 697. https://doi.org/10.1038/s42003-020-01420-3
AuthorsManzo, G., Hind, C.K, Ferguson, P.M, Amison, R.T, Hodgson-Casson, A., Ciazynska, K.A., Weller, B.J, Clarke, M., Lam, C., Man, R.C ., O'Shaughnessy, B.G., Clifford, M., Bui, T., Drake, Alex F, Atkinson, R., Lam, J., Pitchford, S.C, Page, C.P, Phoenix, D.A, Lorenz, C., Sutton, J. and Mason, A.
AbstractAntimicrobial peptides (AMPs) are a potential alternative to classical antibiotics that are yet to achieve a therapeutic breakthrough for treatment of systemic infections. The antibacterial potency of pleurocidin, an AMP from Winter Flounder, is linked to its ability to cross bacterial plasma membranes and seek intracellular targets while also causing membrane damage. Here we describe modification strategies that generate pleurocidin analogues with substantially improved, broad spectrum, antibacterial properties, which are effective in murine models of bacterial lung infection. Increasing peptide-lipid intermolecular hydrogen bonding capabilities enhances conformational flexibility, associated with membrane translocation, but also membrane damage and potency, most notably against Gram-positive bacteria. This negates their ability to metabolically adapt to the AMP threat. An analogue comprising D-amino acids was well tolerated at an intravenous dose of 15 mg/kg and similarly effective as vancomycin in reducing EMRSA-15 lung CFU. This highlights the therapeutic potential of systemically delivered, bactericidal AMPs.
Year2020
JournalCommunications biology
Journal citation3 (1), p. 697
PublisherSpringer
ISSN2399-3642
Digital Object Identifier (DOI)https://doi.org/10.1038/s42003-020-01420-3
Funder/ClientWellcome Trust
Publication dates
Online27 Nov 2020
Publication process dates
Accepted22 Oct 2020
Deposited15 Dec 2020
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Open
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