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A Platform of Anti-biofilm Assays Suited to the Exploration of Natural Compound Libraries
Published on: December 27, 2016
A cathelicidin-2-derived peptide effectively impairs Staphylococcus epidermidis biofilms
E Margo Molhoek1, Albert van Dijk, Edwin J A Veldhuizen
1TNO Defense, Security and Safety, Rijswijk, The Netherlands.
International Journal of Antimicrobial Agents
|March 8, 2011
Summary
The novel peptide F(2,5,12)W effectively prevents Staphylococcus epidermidis biofilm formation and disrupts existing biofilms, even in multidrug-resistant strains. This host defence peptide shows promise as a new therapeutic agent against persistent bacterial infections.
Area of Science:
- Microbiology
- Infectious Diseases
- Drug Discovery
Background:
- Staphylococcus epidermidis is a primary cause of hospital-acquired infections, forming antibiotic-resistant biofilms on medical devices.
- Biofilms are bacterial communities encased in an extracellular matrix, exhibiting significantly higher antibiotic resistance than planktonic bacteria.
- Host defence peptides (HDPs) are promising candidates for novel antibiotic development due to their potent antimicrobial properties.
Purpose of the Study:
- To investigate the antibiofilm activity of a short variant of chicken cathelicidin-2, peptide F(2,5,12)W, against Staphylococcus epidermidis.
- To evaluate the efficacy of peptide F(2,5,12)W in preventing biofilm formation and impairing mature biofilms of both wild-type and multidrug-resistant S. epidermidis strains.
Main Methods:
- In vitro assessment of peptide F(2,5,12)W's antibiofilm activity against two S. epidermidis strains.
- Determination of biofilm inhibition and disruption capabilities at various peptide concentrations.
- Measurement of biofilm metabolic activity following peptide challenge.
Main Results:
- Peptide F(2,5,12)W potently inhibited S. epidermidis biofilm formation at 2.5 μM, a concentration below its minimal inhibitory concentration (10 μM).
- Pre-formed biofilms were impaired by peptide F(2,5,12)W; a 4-hour challenge with 40 μM F(2,5,12)W eradicated metabolic activity in wild-type biofilms and reduced it by over 50% in multidrug-resistant biofilms.
- The peptide demonstrated significant antibiofilm activity against both tested strains, including a multidrug-resistant isolate.
Conclusions:
- Peptide F(2,5,12)W is effective in preventing the formation of Staphylococcus epidermidis biofilms.
- The peptide also demonstrates the ability to impair established S. epidermidis biofilms, offering a dual-action therapeutic potential.
- F(2,5,12)W represents a promising candidate for developing new strategies against nosocomial infections caused by S. epidermidis biofilms.
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