Oral care products containing a natural chemical that stops bacteria harming teeth could help prevent decay, a study suggests.
The compound – known as trans-chalcone – is related to chemicals found in liquorice root. The study shows that it blocks the action of a key enzyme that allows the bacteria to thrive in oral cavities.
The bacteria – Streptococcus mutans – metabolise sugars from food and drink, which produces a mild acid and leads to the formation of plaque. Without good dental hygiene, the combination of plaque and mouth acid can lead to tooth decay.
Researchers found that blocking the activity of the enzyme prevents bacteria forming a protective biological layer – known as a biofilm – around themselves. Plaque is formed when bacteria attach themselves to teeth and construct biofilms. Preventing the assembly of these protective layers would help stop bacteria forming plaque, the teams says.
The study, led by scientists at the University of Edinburgh, is the first to show how trans-chalcone prevents bacteria forming biofilms.
The team worked out the 3D structure of the enzyme – called Sortase A – which allows the bacteria to make biofilms. By doing this, researchers were able to identify how trans-chalcone prevents the enzyme from functioning.
The study, published in the journal Chemical Communications, was supported by Wm. Wrigley Jr. Company and the University of Edinburgh.
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