Chimeric analogs of human β-defensin 1 and θ-defensin disrupt pre-established bacterial biofilms.

Basil Mathew, Sudar Olli, Ankeeta Guru, Ramakrishanan Nagaraj

Bioorganic & medicinal chemistry letters 2017 Aug 01

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Antibiofilm activity of several human defensin analogs that have the ability to kill planktonic bacteria, against pre-established biofilms of Escherichia coli MG1655 and Staphylococcus aureus NCTC 8530 were examined. Linear and linear fatty acylated analogs did not show any activity while disulfide constrained analogs disrupted pre-established S. aureus biofilms. Chimeric analogs of human β-defensin 1 and θ-defensin, hBTD-1 and [d]hBTD-1 were highly active against S. aureus biofilms. Among the analogs tested, only the d-enantiomer [d]hBTD-1 showed activity against E. coli biofilm. Our study provides insights into the structural requirements for the eradication of pre-established biofilms in defensin analogs. Copyright © 2017 Elsevier Ltd. All rights reserved.

Citation

Basil Mathew, Sudar Olli, Ankeeta Guru, Ramakrishanan Nagaraj. Chimeric analogs of human β-defensin 1 and θ-defensin disrupt pre-established bacterial biofilms. Bioorganic & medicinal chemistry letters. 2017 Aug 01;27(15):3264-3266