Saturday July 21, 2018

Obese? Blame it on Fat Cells’ Expansion

According to researchers, the mechanics of 'cellular expansion' plays a pivotal role in fat production

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Obese? Blame it on Fat Cells' Expansion
Obese? Blame it on Fat Cells' Expansion. VOA
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You have heard about obesity or accumulation of fat but do you know that nutrition is not the only factor driving obesity in our kids?

According to researchers, the mechanics of ‘cellular expansion’ plays a pivotal role in fat production.

To understand how obesity develops, a team from Tel Aviv University in Israel used state-of-the-art technology to analyse the accumulation of fat in the body at the cellular level.

“We wanted to find out why a sedentary lifestyle results in obesity, other than making time to eat more hamburgers,” said professor Amit Gefen from Tel Aviv University’s department of biomedical engineering.

“We found that fat cells exposed to sustained, chronic pressure – such as what happens to the buttocks when you are sitting down – experienced accelerated growth of lipid droplets, which are molecules that carry fats,” Gefen added.

Contrary to muscle and bone tissue, which get mechanically weaker with disuse, fat depots in fat cells expanded when they experienced sustained loading by as much as 50 percent. This was a substantial discovery.

The researchers discovered that, once it accumulated lipid droplets, the structure of a cell and its mechanics changed dramatically.

obesity
Representational image. Pixabay

Using a cutting-edge atomic force microscope and other microscopy technologies, they were able to observe the material composition of the transforming fat cell, which became stiffer as it expanded.

This stiffness alters the environment of surrounding cells by physically deforming them, pushing them to change their own shape and composition.

“When they gain mass and change their composition, expanding cells deform neighbouring cells, forcing them to differentiate and expand,” he explained.

Also Read: Kids Who Sleep Less Eat More

This proves that you are not just what you eat. You are also what you feel – and what you are feeling is the pressure of increased weight and the sustained loading in the tissues of the buttocks of the couch potato.

If you can learn to control the mechanical environment of cells, you can then determine how to modulate the fat cells to produce less fat, Natan Shaked from Tel Aviv University noted.

The team is now creating a platform to develop new therapies and technologies to prevent or even reverse fat gain, said the research published in the Biophysical Journal. (Bollywood Country)

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Obesity Alone Does not Increase Death Risk: Study

Earlier, a study, published in The Lancet Diabetes and Endocrinology journal, found that women with metabolically healthy obesity were at 39 per cent higher risk of cardiovascular disease

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The researchers looked at how many people within each group died as compared to those within the normal weight population with no metabolic risk factors.
The researchers looked at how many people within each group died as compared to those within the normal weight population with no metabolic risk factors. Pixabay

Patients who have metabolically healthy obesity but are free from other metabolic risk factors do not have an increased rate of mortality, a new study has found.

Metabolically healthy obesity is a debatable medical condition characterized by obesity which does not produce metabolic complications.

The study, published in the journal Clinical Obesity, showed that unlike dyslipidemia, hypertension and diabetes — each one of which is related to high mortality risk — obesity alone does not pose any threat to life.

“We are showing that individuals with metabolically healthy obesity are actually not at an elevated mortality rate,” said lead author Jennifer Kuk, Associate Professor at the York University in Canada.

“We found that a person of normal weight with no other metabolic risk factors is just as likely to die as the person with obesity and no other risk factors,” Kuk added.

Metabolically healthy obesity is a debatable medical condition characterized by obesity which does not produce metabolic complications.
Metabolically healthy obesity is a debatable medical condition characterized by obesity which does not produce metabolic complications. Pixabay

For the study, the research team followed 54,089 men and women from five cohort studies who were categorized as having obesity alone or clustered with a metabolic factor, or elevated glucose, blood pressure or lipids alone or clustered with obesity or another metabolic factor.

The researchers looked at how many people within each group died as compared to those within the normal weight population with no metabolic risk factors.

They found that one out of 20 individuals with obesity had no other metabolic abnormalities.

Also Read: Abdominal Obesity Linked to Lower Urinary Tract Symptoms

“This is in contrast with most of the literature and we think this is because most studies have defined metabolic healthy obesity as having up to one metabolic risk factor,” said Kuk.

“This is clearly problematic, as hypertension alone increases your mortality risk and past literature would have called these patients with obesity and hypertension, ‘healthy’. This is likely why most studies have reported that ‘healthy’ obesity is still related with higher mortality risk,” Kuk noted.

Earlier, a study, published in The Lancet Diabetes and Endocrinology journal, found that women with metabolically healthy obesity were at 39 per cent higher risk of cardiovascular disease. (IANS)

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