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Related Experiment Video

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Antimicrobial d-Peptide Hydrogels.

Zhen Guo1,2,3, Yujiao Wang1,2,3, Tingyuan Tan1,2,3

  • 1Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.

ACS Biomaterials Science & Engineering
|March 5, 2021
PubMed
Summary
This summary is machine-generated.

Researchers developed a d-amino acid antimicrobial peptide hydrogel (KKd-11) that effectively combats drug-resistant biofilms. This peptide hydrogel shows enhanced antimicrobial and antiprotease activity, offering potential for treating biofilm infections.

Keywords:
D-amino acids (DAAs)D-peptideantimicrobial peptides (AMPs)antiprotease activityhydrogelself-assembly

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Area of Science:

  • Biochemistry
  • Materials Science
  • Microbiology

Background:

  • Biofilms are prevalent in medical, environmental, and industrial settings.
  • Biofilm control is challenging due to significant drug resistance.
  • Antimicrobial peptides offer a potential solution for biofilm management.

Purpose of the Study:

  • To design and synthesize an amphipathic antimicrobial peptide using d-amino acids (DAAs).
  • To evaluate the self-assembly and antimicrobial properties of the d-peptide hydrogel (KKd-11).
  • To compare KKd-11 with its l-amino acid counterpart (KK-11) for biofilm inhibition and degradation.

Main Methods:

  • Synthesis of amphipathic antimicrobial peptides composed of d-amino acids (KKd-11) and l-amino acids (KK-11).
  • Hydrogel formation and characterization of self-assembled structures.
  • Assessment of antimicrobial activity against biofilms, including inhibition of formation and damage to mature biofilms.
  • Evaluation of antiprotease activity and biocompatibility through cell viability assays.

Main Results:

  • KKd-11 self-assembled into a hydrogel with superior long-term antimicrobial ability and antiprotease activity compared to KK-11.
  • KKd-11 effectively inhibited biofilm formation and damaged preformed mature biofilms.
  • The d-peptide hydrogel demonstrated significant antibacterial efficacy within biofilms.
  • Cell viability assays confirmed the good biocompatibility of the KKd-11 peptide.

Conclusions:

  • D-amino acid based peptide hydrogels exhibit enhanced antimicrobial properties against biofilms.
  • KKd-11 demonstrates potential as a therapeutic agent for combating biofilm-induced infections.
  • The developed d-peptide hydrogels represent a promising strategy for addressing drug-resistant microbial communities.