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Home NEWS Science News Chemistry

Chemical compound found in essential oils improves wound healing, IU study finds

Bioengineer by Bioengineer
December 18, 2019
in Chemistry
Reading Time: 4 mins read
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Credit: Photo courtesy of Sachiko Koyama


BLOOMINGTON, Ind. — Indiana University researchers have discovered that a chemical compound found in essential oils improves the healing process in mice when it is topically applied to a skin wound — a finding that could lead to improved treatments for skin injuries in humans.

IU scientists also reported that skin tissue treated with the chemical compound, beta-carophyllene — which is found in lavender, rosemary and ylang ylang, as well as various herbs and spices such as black pepper — showed increased cell growth and cell migration critical to wound healing. They also observed increased gene expression of hair follicle stem cells in the treated tissue. The scientists did not find any involvement of the olfactory system in the wound healing.

Their research was published Dec. 16 in the journal PLOS ONE.

“This is the first finding at the chemical-compound level showing improved wound healing in addition to changes in gene expression in the skin,” said Sachiko Koyama, corresponding author on the paper, who, at the time of this research, was an associate scientist at the IU School of Medicine and is currently a visiting scientist in the IU College of Arts and Sciences’ Department of Biology. “The way gene expression changed also suggests not only improved wound healing but also the possibility of less scar formation and a more full recovery.

“It’s an example that essential oils work; however, it’s not through our sense of smell.”

Essential oils are natural, concentrated oils extracted from plants. Their use by humans dates back to ancient Egypt, but the scented oils have experienced a resurgence in popularity in the U.S. over the past few years, with many people using them for aromatherapy.

Koyama, whose original field of study is pheromones, said she wasn’t interested in essential oils at first. The project started when she saw several students studying the wound healing process in mice in the Medical Sciences Program at the IU School of Medicine-Bloomington. Having previously worked in the IU College of Arts and Sciences’ Department of Psychological and Brain Sciences, where scientists are working with cannabinoid receptors, Koyama knew that beta-caryophyllene activates not only olfactory receptors but also cannabinoid receptor 2 (CB2), which has anti-inflammatory impact when it is activated.

“In the wound healing process, there are several stages, starting from the inflammatory phase, followed by the cell proliferation stage and the remodeling stage,” she said. “I thought maybe wound healing would be accelerated if inflammation was suppressed, stimulating an earlier switch from the inflammatory stage to the next stage.”

This accelerated the wound healing process, she said, but the resulting change in gene expression indicates that the improved healing is not merely achieved through activation of the CB2 receptor.

“It’s possibly more complicated,” Koyama said. “Our findings suggest the involvements of some other routes in addition to CB2. I hope to clarify the mechanisms of action in the near future.”

Although the study’s results are promising, Koyama said she wouldn’t recommend that people start treating their injuries with just any essential oils, as her research applies to a very specific chemical compound with known purity, diluted in a specific concentration.

“It’s not very precise to use the essential oils themselves because there are differences,” she said. “Even if you say you used lavender, when the lavender was harvested, where it was harvested, how it was stored — all of this makes a difference in the chemical composition.”

Koyama said further research is required to figure out how beta-carophyllene might be used to develop new treatments for skin wounds in humans. She said she hopes to better understand the mechanisms that accelerate the healing process and to find a combination of chemical compounds that could be used together to accelerate drug delivery and chemical stability, which is important for avoiding or suppressing allergic responses caused by oxidation of the chemical compounds.

“We still need thorough scientific studies at the chemical-compound level and also to test the combinations of these chemical compounds,” Koyama said. “For example, there are studies showing that linalool — another compound found in lavender — can suppress anxiety through the olfactory system. There could be the best combinations of chemical compounds at specific ratios, and we might be able to do prescriptions of aroma chemical compounds, depending on the specific treatment goals.

“There are many things to test before we can start using it clinically, but our results are very promising and exciting; someday in the near future, we may be able to develop a drug and drug delivery methods using the chemical compounds found in essential oils.”

###

Additional IU authors on the paper include Anna Purk and Anthony Mescher of the IU School of Medicine; and, in the IU College of Arts and Sciences, Manpreet Kaur of the Department of Psychological and Brain Sciences, Helena A. Soini and Milos V. Novotny of the Department of Chemistry and the Institute for Pheromone Research, Keith Davis of the Department of Biology, and C. Cheng Kao of the Department of Molecular and Cellular Biochemistry. Hiroaki Matsunami of Duke University also authored the paper.

This research was supported by the Office of the Vice Provost of Research at IU Bloomington through a Collaborative Research and Creative Activity Funding Award to Koyama. Purk and Kaur worked on the study as awardees of the Research Experience for Undergraduate Women scholarship from the IU Center of Excellence for Women in Technology.

IU Research

Indiana University’s world-class researchers have driven innovation and creative initiatives that matter for nearly 200 years. From curing testicular cancer to collaborating with NASA to search for life on Mars, IU has earned its reputation as a world-class research institution. Supported by $680 million last year from our partners, IU researchers are building collaborations and uncovering new solutions that improve lives in Indiana and around the globe.

Media Contact
Andrea Zeek
[email protected]
317-278-1703

Original Source

https://news.iu.edu/stories/2019/12/iub/releases/17-chemical-compound-essential-oils-improve-wound-healing.html

Related Journal Article

http://dx.doi.org/10.1371/journal.pone.0216104

Tags: Alternative MedicineBiochemistryCell BiologyDermatologyGeneticsMedicine/HealthPlant SciencesTrauma/Injury
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