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Home NEWS Science News Health

Insect wings hold antimicrobial clues for improved medical implants

Bioengineer by Bioengineer
April 6, 2020
in Health
Reading Time: 2 mins read
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Credit: Professor Bo Su, University of Bristol

Some insect wings such as cicada and dragonfly possess nanopillar structures that kill bacteria upon contact. However, to date, the precise mechanisms that cause bacterial death have been unknown.

Using a range of advanced imaging tools, functional assays and proteomic analyses, a study by the University of Bristol has identified new ways in which nanopillars can damage bacteria.

These important findings, published in Nature Communications, will aid the design of better antimicrobial surfaces for potential biomedical applications such as medical implants and devices that are not reliant on antibiotics.

Bo Su, Professor of Biomedical Materials at the University of Bristol’s Dental School, who authored the research said:

“In this work, we sought to better understand nanopillar-mediated bactericidal mechanisms. The current dogma is that nanopillars kill bacteria by puncturing bacterial cells, resulting in lysis. However, our study shows that the antibacterial effects of nanopillars are actually multifactorial, nanotopography- and species-dependent.

“Alongside deformation and subsequent penetration of the bacterial cell envelope by nanopillars, particularly for Gram-negative bacteria, we found the key to the antibacterial properties of these nanopillars might also be the cumulative effects of physical impedance and induction of oxidative stress.

“We can now hopefully translate this expanded understanding of nanopillar-bacteria interactions into the design of improved biomaterials for use in real world applications.”

Funded by the Medical Research Council, the implications of the research are far-reaching. Prof. Su explains:

“Now we understand the mechanisms by which nanopillars damage bacteria, the next step is to apply this knowledge to the rational design and fabrication of nanopatterned surfaces with enhanced antimicrobial properties.

“Additionally, we will investigate the human stem cell response to these nanopillars, so as to develop truly cell-instructive implants that not only prevent bacterial infection but also facilitate tissue integration.”

###

Paper:

Antibacterial effects of nanopillar surfaces are mediated by cell impedance, penetration and induction of oxidative stress, Nature Communications. DOI: 10.1038/s41467-020-15471-x.

Media Contact
Shona East
[email protected]

Related Journal Article

http://dx.doi.org/10.1038/s41467-020-15471-x

Tags: BacteriologyBiologyBiomedical/Environmental/Chemical EngineeringBiotechnologyCell BiologyDentistry/Periodontal DiseaseEntomologyMedicine/HealthTransplantation
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