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Related Experiment Video

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High-throughput Identification of Bacteria Repellent Polymers for Medical Devices
10:43

High-throughput Identification of Bacteria Repellent Polymers for Medical Devices

Published on: November 5, 2016

Surface-immobilised antimicrobial peptoids.

Andrea R Statz1, Jong Pil Park, Nathaniel P Chongsiriwatana

  • 1Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA.

Biofouling
|August 13, 2008
PubMed
Summary
This summary is machine-generated.

New antimicrobial peptoid oligomers (ampetoids) effectively kill bacteria on medical device surfaces. This surface modification strategy prevents infections by combining active antimicrobial and passive antifouling functions.

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Mitigation of Blood Borne Cell Attachment to Metal Implants through CD47-Derived Peptide Immobilization
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Last Updated: Jul 2, 2026

High-throughput Identification of Bacteria Repellent Polymers for Medical Devices
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An Efficient Method for the Synthesis of Peptoids with Mixed Lysine-type/Arginine-type Monomers and Evaluation of Their Anti-leishmanial Activity
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An Efficient Method for the Synthesis of Peptoids with Mixed Lysine-type/Arginine-type Monomers and Evaluation of Their Anti-leishmanial Activity

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08:13

Mitigation of Blood Borne Cell Attachment to Metal Implants through CD47-Derived Peptide Immobilization

Published on: December 3, 2020

Area of Science:

  • Biomaterials Science
  • Surface Chemistry
  • Microbiology

Background:

  • Infections associated with implantable medical devices pose significant clinical challenges.
  • Developing effective surface modification techniques is crucial for preventing device-related infections.
  • Antimicrobial peptides are a potential strategy, but stability and delivery can be issues.

Purpose of the Study:

  • To synthesize and characterize antimicrobial peptoid oligomers (ampetoids) for surface modification.
  • To create robust polymer surface coatings with both antimicrobial (AM) and antifouling (AF) properties.
  • To evaluate the efficacy of these modified surfaces against bacterial adhesion and viability.

Main Methods:

  • Design and synthesis of peptoid oligomers mimicking antimicrobial peptides, incorporating a spacer for mobility and an adhesive moiety for immobilization.
  • Modification of titanium dioxide (TiO2) substrata with ampetoids.
  • Backfilling the modified surfaces with an antifouling polypeptoid polymer.
  • Confocal microscopy to assess the interaction of E. coli with the modified surfaces.

Main Results:

  • Successful immobilization of ampetoids onto TiO2 substrata.
  • Creation of dual-function (AM/AF) peptoid polymer surface coatings.
  • Confocal microscopy revealed damage to E. coli cell membranes after 2-hour exposure to modified surfaces.
  • Demonstrated retention of antimicrobial activity by immobilized ampetoids.

Conclusions:

  • Immobilized ampetoids retain their antimicrobial properties, effectively damaging bacterial cell membranes.
  • The developed surface modification technique offers a promising strategy for creating infection-resistant medical devices.
  • Combining active antimicrobial and passive antifouling functionalities on surfaces enhances their performance against bacterial colonization.