The researchers, including Indian origin scientist Vishwa Deep Dixit from Yale University in the US, said the human body’s ability to generate energy by burning the belly fat reduces with age.
Dixit’s lab had earlier found that the immune cells needed for the fat-burning process — called macrophages — were still active, but their overall numbers declined as belly fat increased with ageing.
In the current study, the researchers found that Adipose B cells in belly fat proliferated as animals aged, contributing to increased inflammation and metabolic decline.
“These adipose B cells are a unique source of inflammation,” Dixit said.
“Normally the B cells produce antibodies, and defend against infection. But with ageing, the increased adipose B cells become dysfunctional, contributing to metabolic disease,” he added.
Dixit added that some B cells expanded as needed to protect the body from infection, and contracted to their natural state.
But with ageing, he said, they don’t contract in the belly fat.
Gaining Weight During Winter? Include These Foods To Stay Healthy
Secret To Stay In Shape
19 Dec, 2017
For some of us, this is the season to put on winter weight as it becomes difficult to keep up the pace of daily exercise due to cold weather. Fried snacks add to the damage.
While we should make all efforts to stick to a fitness regimen, snacking on certain fruits can keep away those unwanted kilos and keep the immune system strong too.
Here are the picks by Ayush Rekha:
1 Jun, 2017
It is low in calorie and comes packed with antioxidants too
1 Sep, 2017
One glass of tomato juice offers 24% of vitamin A and 34% of vitamin C that our body needs each day. Both of them contribute to immune system health.
1 Dec, 2017
Orange is a great source of vitamin C. It helps your body fight against germs and gives you potassium, minerals, folate and fibre.
19 Dec, 2017
It strengthens your immune system and protects you from bacteria that cause cold and cough.
“This predisposes an animal to diabetes and metabolic dysfunction like inability to burn fat,” he said.
Dixit suspects that an increased human life expectancy may be behind this – pushing the body’s cells beyond the limits imposed by evolution.
“Several mechanisms in the body are not selected for longevity,” he said.
The researchers also discovered that adipose B cells expand by receiving signals from nearby macrophages.
They found that the expansion process could be reversed to protect against age-induced decline in metabolic health by reducing the macrophage signal and by removing adipose B cells.
Dixit theorised that some drugs could be repurposed to target the dysfunctional adipose B cells for improved health outcomes.
Some immunotherapy drugs that neutralize B cells — used in certain cancers — could be tested for their effectiveness in reducing metabolic disease in elderly people, Dixit said.