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  5. Latest health update: Here's why obesity increases risk of developing asthma

Latest health update: Here's why obesity increases risk of developing asthma

Obesity is a major risk factor for asthma, in part because of the systemic and localised inflammation of the airways that occur in people with a high body mass index.

India TV Lifestyle Desk India TV Lifestyle Desk
New Delhi Published on: September 13, 2018 15:14 IST
Latest health update: Here's why obesity increases risk of developing asthma

Latest health update: Here's why obesity increases risk of developing asthma

Obesity can alter airway muscle function, thereby increasing your risk of developing asthma.

Obesity is a major risk factor for asthma, in part because of the systemic and localised inflammation of the airways that occur in people with a high body mass index.

People with obesity "also manifest a higher risk of severe asthma, decreased disease control and decreased response to corticosteroids therapy," explained the bicoastal team of scientists who conducted the research.

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However, previous studies suggest that some people with obesity may have a type of asthma that is not caused by airway inflammation, but by hyperresponsiveness, a higher-than-normal response to an allergen, in the airway smooth muscle. Hyperresponsiveness causes the airways to narrow, obstructing ease of breathing, and can occur when the muscles contract or begin to spasm.

The research team combined human airway smooth muscle cells with histamine, a chemical the immune system makes in response to an allergen, and carbachol, a drug that stimulates the part of the nervous system that controls the airways. Stimulating airway cells with these substances causes the cells to release calcium, which mimics muscle contraction.

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The researchers found that muscle cells from obese donors released more calcium and had greater shortening, a function that occurs during muscle contraction, than the cells from normal-weight donors. In addition, the cells from female obese donors released more calcium than cells from male obese donors.

These results suggest that obesity "imprints on structural cells [or airway smooth muscle cells] a unique signature that can be identified and that may lead to novel targeted approaches to improve asthma management without the use of steroids," explained Reynold Panettieri, director of the Rutgers Institute for Translational Medicine and Science and corresponding author of the study.

The study appears in the American Journal of Physiology -Lung Cellular and Molecular Physiology.

(With ANI Inputs)

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