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Dinoponera quadriceps venom as a source of active agents against Staphylococcus aureus

Larissa Queiroz Rocha1, Mar Orzaéz2, Alicia Belén García-Jareño2

  • 1Department of Clinical and Toxicological Analysis, School of Pharmacy, Federal University of Ceará, Fortaleza, CE, Brazil.

Toxicon : Official Journal of the International Society on Toxinology
|November 14, 2020
PubMed

Insights

Dinoponera quadriceps ant venom peptides (DNTxs) show potent antibacterial effects against Staphylococcus aureus, including Methicillin-Resistant S. aureus (MRSA). M-PONTX-Dq3a effectively prevents biofilm formation and disrupts bacterial membranes.

Area of Science:

  • Microbiology
  • Biochemistry
  • Antimicrobial Research

Background:

  • Staphylococcus aureus is a virulent pathogen, with increasing Methicillin-Resistant S. aureus (MRSA) strains necessitating new antibiotic development.
  • Antimicrobial Peptides (AMPs) offer a promising alternative due to their broad-spectrum activity and low resistance rates.
  • Dinoponera quadriceps ant venom (DqV) has demonstrated potential antimicrobial properties against S. aureus.

Purpose of the Study:

  • To evaluate the antibacterial efficacy of DqV-derived peptides (dinoponeratoxins, DNTxs) against both Methicillin-Sensitive S. aureus (MSSA) and MRSA strains.
  • To investigate the potential of DNTxs in inhibiting biofilm formation and disrupting bacterial membranes.

Main Methods:

  • Testing DNTxs against MSSA and MRSA strains.
  • Assessing biofilm inhibition at low micromolar concentrations.
  • Evaluating membrane disruption effects.

Main Results:

  • DNTx M-PONTX-Dq3a demonstrated potent inhibition against both MSSA and MRSA.
  • M-PONTX-Dq3a effectively prevented biofilm formation in the range of 0.78-3.12 μM.
  • The peptide exhibited rapid membrane disruption activity.

Conclusions:

  • DNTx M-PONTX-Dq3a is a potent inhibitor of S. aureus, including MRSA.
  • This peptide shows promise for preventing biofilm formation on medical devices via anti-adhesive coatings.
  • M-PONTX-Dq3a presents a potential therapeutic agent for skin and soft tissue infections caused by resistant S. aureus strains.
Keywords:
Antimicrobial peptidesBiofilmDinoponeratoxinsMethicillin-resistantStaphylococcus aureus

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