Dr. Ariel Wilson, a senior postdoctoral fellow in Dr. Sapieha's team and lead author of the new study, found that Neuropilin1-positive macrophage immune cells accumulate in fat tissue and orchestrate healthy weight gain. These cells are important in removing excess fat from the body and also help build the body's infrastructure to accommodate new fat reserves without causing complications typically associated with obesity.
‘A type of inflammatory white blood cell called Neuropilin1-positive macrophage is critical for preparing fat tissue for healthy weight gain.’
is made up of billions of cells called adipocytes that store energy. Depending on how many calories we intake, adipose tissue (body fat) expands or contracts. In order for fat tissue to expand in a healthy manner, it must first be prepared, much like a garden must be plowed before planting seeds.
The study also demonstrates that transferring Neuropilin1-positive immune cells (through the bone marrow) to mice that lack them actually helps the animals regain control of their blood sugar levels and makes the animals metabolically healthier in general.
In sum, this study demonstrates that a subset of immune cells is critical for ensuring healthy
. The study's findings are important in helping understand the complications that arise from obesity.