Cinnamon Oil Could be Key in Fighting Superbugs
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Cinnamon Oil Could be Key in Fighting Superbugs

News Staff — Swinburne University of Technology
Jul 25, 2018

“Though many previous studies have reported antimicrobial activity of cinnamon essential oil, it is not widely used in the pharmaceutical industry.” – Dr. Sanjida Halim Topa

(Australia) -- As antibiotics become less effective against superbugs, a researcher at Swinburne University of Technology has been focusing on traditional agents to modify the behavior of bacteria rather than killing bacteria.

As part of her PhD studies, Dr. Sanjida Halim Topa investigated cinnamaldehyde, a major component of cinnamon essential oil. She found it inhibited the development of biofilm, a sticky film of bacteria – like the plaque that forms on teeth – that can cause persistent infections, which resist even the most potent antibiotics.

Dr. Topa’s research has been published in Microbiology.

There is an urgent need to develop alternatives to antibiotics to treat chronic biofilm-mediated infections, such as may occur with urinary catheters and artificial joints.

“Though many previous studies have reported antimicrobial activity of cinnamon essential oil, it is not widely used in the pharmaceutical industry,” Dr. Topa says.

“We aimed to search for the molecular activity of this oil, focusing on its major component, cinnamaldehyde. This is the compound that gives cinnamon its flavor.”

Developing ways to disrupt biofilms

Rather than killing the bacteria, Dr. Topa was looking to modify the behavior of bacteria by disrupting bacterial communication to prevent biofilm formation.

“We hypothesized that using natural antimicrobials, such as essential oils, might interfere in biofilm formation. Thus, we focused on the impact of different concentrations of cinnamaldehyde in different biofilm development stages.

Dr. Topa tested the effect of different concentrations of cinnamaldehyde on biofilms formed by the pathogenic Pseudomonas aeruginosa strain of bacteria. She found that a sub-lethal concentration of cinnamaldehyde controlled the dispersion of Pseudomonas aeruginosa and the development of biofilm.

“Humans have a long history of using natural products to treat infections, and there is a renewed focus on such antimicrobial compounds. Natural products may offer a promising solution to this problem,” Dr. Topa says.

This research was undertaken with colleagues at Nanyang Technological University in Singapore.

Dr. Topa is now investigating embedding cinnamaldehyde in nanofibers in wound dressings.

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