Fat found in overweight people's lungs

Published: 18 Oct 2019   

Online Desk

Fatty tissue has been found in the lungs of overweight and obese people for the first time.

Australian researchers analysed lung samples from 52 people and found the amount of fat increased in line with body mass index, reports BBC.

They said their findings could explain why being overweight or obese increased asthma risk.

Lung experts said it would be interesting to see if the effect could be reversed by weight loss.

In the study, published in the European Respiratory Journal, scientists looked at post-mortem samples of lung donated for research.

Fifteen had had no reported asthma, 21 had asthma but died of other causes and 16 died of the condition.

The scientists used dyes to carry out detailed analyses of almost 1,400 airways from the lung samples under the microscope.

The researchers found adipose (fatty) tissue in the walls of airways, with more present in people with a higher body mass index,

And they say the increase in fat appears to alter the normal structure of the airways and cause inflammation in the lungs - which could explain the increased risk of asthma in overweight or obese people.

Dr Peter Noble, an associate professor at the University of Western Australia, in Perth who worked on the study, said: "Being overweight or obese has already been linked to having asthma or having worse asthma symptoms.

"Researchers have suggested that the link might be explained by the direct pressure of excess weight on the lungs or by a general increase in inflammation created by excess weight."

But, he said, their study suggested "another mechanism is also at play".

"We've found that excess fat accumulates in the airway walls, where it takes up space and seems to increase inflammation within the lungs," Dr Noble said.

"We think this is causing a thickening of the airways that limits the flow of air in and out of the lungs and that could at least partly explain an increase in asthma symptoms."

Prof Thierry Troosters, president of the European Respiratory Society, said: "This is an important finding on the relationship between body weight and respiratory disease because it shows how being overweight or obese might be making symptoms worse for people with asthma.

"This goes beyond the simple observation that patients with obesity need to breathe more with activity and exercise.

"The observation points at true airway changes that are associated with obesity."

He said more research was needed to find out if this build-up of fatty tissue could be reversed through weight loss but asthma patients should be helped to achieve a healthy weight.

Dr Elizabeth Sapey, chair of the science committee at the British Thoracic Society, said this was the first time body weight had been shown to impact the structure of the airways in the lungs.

"Given the increasing incidence of obesity nationally and across the globe, the study could be of major importance in helping us understand why asthma remains a major health issue and identify new ways to improve asthma treatment," she said.

"It is only a small study though, and we need to assess this in larger groups of patients and in other lung diseases," Dr Sapey added.


Read More

Imrul guides Challengers to first win in BPL

Imrul guides Challengers to first win in BPL

Veteran Imrul Kayes hit 38-ball 61 runs with two fours ...

Violence against women protested at an event in city

Violence against women protested at an event in city

An event titled 'Protest violence against women' was held at ...

Bangladesh moves one step ahead in HDI

Bangladesh moves one step ahead in HDI

Bangladesh went up one spot ahead to 135 among 189 ...

1 killed, 25 injured in Keraniganj plastic factory fire

1 killed, 25 injured in Keraniganj plastic factory fire

 One was killed and 20 others were injured in a ...

Khaleda Zia's health report at SC

Khaleda Zia's health report at SC

Jailed BNP Chairperson Begum Khaleda Zia's latest health examination report ...

2.7 km of Padma Bridge visible

2.7 km of Padma Bridge visible

The 18th span of the Padma Multipurpose Bridge was installed ...

Chinese citizen body recovered from Banani

Chinese citizen body recovered from Banani

Police have recovered the body of a Chinese citizen from ...

Produce medicines for leprosy patients: PM

Produce medicines for leprosy patients: PM

Prime Minister Sheikh Hasina has urged local pharmaceutical companies to ...