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Ginger may Benefit Asthma Patients

by Sheela Philomena on May 20, 2013 at 5:13 PM
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 Ginger may Benefit Asthma Patients

Purified components of ginger may help asthma patients breathe more easily, says study.

Asthma is characterized by bronchoconstriction, a tightening of the bronchial tubes that carry air into and out of the lungs. Bronchodilating medications called beta-agonists are among the most common types of asthma medications and work by relaxing the airway smooth muscle (ASM) tissues.

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This study looked at whether specific components of ginger could help enhance the relaxing effects of bronchodilators.

"Asthma has become more prevalent in recent years, but despite an improved understanding of what causes asthma and how it develops, during the past 40 years few new treatment agents have been approved for targeting asthma symptoms," said lead author Elizabeth Townsend, PhD, post-doctoral research fellow in the Columbia University Department of Anesthesiology.
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"In our study, we demonstrated that purified components of ginger can work synergistically with beta-agonists to relax ASM," she explained.

To conduct their study, the researchers took human ASM tissue samples and caused the samples to contract by exposing them to acetylcholine, a neurotransmitting compound that causes bronchoconstriction. Next, the researchers mixed the beta-agonist isoproterenol with three separate components of ginger: 6-gingerol, 8-gingerol or 6-shogaol.

Contracted tissue samples were exposed to each of these three mixtures as well as unadulterated isoproterenol and the relaxation responses were recorded and compared.

At the conclusion of their study, the researchers found that tissues treated with the combination of purified ginger components and isoproterenol exhibited significantly greater relaxation than those treated only with isoproterenol; of the three ginger components, 6-shogaol appeared most effective in increasing the relaxing effects of the beta-agonist.

Once they were able to demonstrate that the ginger components enhanced the relaxing effects of the beta -agonist, they turned their attention to learning why. First, the researchers wanted to determine if the ginger components might work by affecting an enzyme called phosphodiesterase4D (PDE4D).

Previous studies have shown that PDE4D, which is found in the lungs, inhibits processes that otherwise help relax ASM and lessen inflammation. Using a technique called fluorescent polarization, they found that all three components significantly inhibited PDE4D.

Next, the study looked at F-actin filaments, a protein structure which previous studies have shown plays a role in the constriction of ASM, and found that 6-shogaol was effective in speedily dissolving these filaments.

"Taken together, these data show that ginger constituents 6-gingerol, 8-gingerol and 6-shogaol act synergistically with the beta -agonist in relaxing ASM, indicating that these compounds may provide additional relief of asthma symptoms when used in combination with beta -agonists," Dr. Townsend noted.

"By understanding the mechanisms by which these ginger compounds affect the airway, we can explore the use of these therapeutics in alleviating asthma symptoms," she added.

The results of the study will be presented at the ATS 2013 International Conference.

Source: ANI
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