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Related Concept Videos

Biofilms01:29

Biofilms

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Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
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Bacterial Signaling01:30

Bacterial Signaling

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Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
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Related Experiment Video

Updated: Jul 16, 2025

Wet Chemistry and Peptide Immobilization on Polytetrafluoroethylene for Improved Cell-adhesion
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Efficient titanium surface modified using bifunctional chimeric peptides to prevent biofilm formation by multiple

Hongjuan Geng1, Xun Sun1, Xi Zhang2

  • 1Department of Stomatology, Tianjin Hospital, 406 Jiefang South Road, Hexi District, Tianjin 300211, PR China.

Colloids and Surfaces. B, Biointerfaces
|September 10, 2023
PubMed
Summary

Researchers developed a novel chemical peptide to coat titanium surfaces, effectively preventing bacterial biofilm formation on oral implants. This peptide shows potent antibacterial activity and excellent biocompatibility, offering a promising solution for implant longevity.

Keywords:
Bifunctional chimeric peptideHuman β-defensin-3 (hBD-3)Modification of titanium surfaceTi-binding peptide-1 (TBP-1)

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

  • Biomaterials Science
  • Microbiology
  • Surface Chemistry

Background:

  • Bacterial biofilm formation on oral implants remains a significant clinical challenge.
  • Titanium (Ti) surfaces are susceptible to microbial colonization, leading to peri-implant diseases.
  • Modifying Ti surfaces with bioactive agents can enhance implant success rates.

Purpose of the Study:

  • To design and synthesize a novel chemical peptide by conjugating antimicrobial and Ti-binding sequences.
  • To evaluate the efficacy of the peptide-modified Ti surface in inhibiting oral bacterial biofilm formation.
  • To investigate the antibacterial mechanism and biocompatibility of the modified surface.

Main Methods:

  • Peptide design: Linking human β-defensin-3 (hBD-3) antimicrobial sequence to Ti-binding peptide-1 (TBP-1) via a glycine linker.
  • Surface modification: Immobilizing the synthesized chemical peptide onto titanium surfaces.
  • Antimicrobial assay: Testing bactericidal activity against oral bacteria (e.g., S. gordonii, F. nucleatum, P. gingivalis).
  • Biocompatibility testing: Evaluating L929 cell response to the modified surface.
  • Mechanism investigation: Analyzing bacterial membrane integrity disruption.

Main Results:

  • The chemical-peptide-modified Ti surface demonstrated significant bactericidal activity against key oral pathogens.
  • The modified surface exhibited excellent biocompatibility with L929 cells, indicating safety for host tissues.
  • The peptide's antibacterial mechanism involves disrupting the integrity of bacterial cell membranes.
  • The peptide-modified Ti surface effectively inhibited oral bacterial biofilm formation.

Conclusions:

  • The developed chemical peptide, when immobilized on Ti surfaces, offers a dual function of Ti binding and potent antibacterial activity.
  • This approach shows significant potential for preventing peri-implant diseases and improving the survival rate of oral implants.
  • The findings suggest a promising strategy for developing next-generation dental implant materials.