The sense of taste is not limited to the mouth, and researchers say this discovery may lead to better treatments for diseases such as asthma.
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The bitter taste receptors are also found in smooth muscles of the lungs and airways. These muscles relax when they are exposed to bitter tastes, according to a study by researchers from the Medical College of Maryland in Baltimore, published in an edition of the Nature Medicine journal.
The discovery surprised the doctor Stephen B. Liggett, a lung specialist who identified an association between bitter taste with poisonous plants, leading humans to avoid ingesting bitter foods.
Liggett believed that the bitter taste receptors in the lungs produce a reaction of “rejection or numbness”, causing the hardness of the chest and consequent cough, so that the person leaves the “toxic” environment.
Instead, when scientists tested some non-toxic bitter components in the airways of rats and humans, the airways relaxed and open.
Liggett, who hopes to begin human trials within a year, explained that eating bitter does not help in the treatment of asthma. According to him, it is need to inhale enough doses of aerosol components.
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