White Adipose Tissue Initiates IL-33-Dependent Expression of Interleukin 4/13 in Myeloid Cells During Inflammation

This study explores the role of dermal white adipose tissue (dWAT) in regulating acute skin inflammation, particularly through the IL-33-dependent expression of interleukin 4 and 13 in myeloid cells. Using an Imiquimod (IMQ) mouse model, the research shows that activated dWAT releases proinflammatory mediators that influence myeloid cells, crucial for inflammation regulation and tissue repair. IL-33 from dWAT is identified as a key stimulator of these cytokines, but obesity impairs this pathway, reducing IL-4 and IL-13 expression, which may contribute to chronic inflammation in obesity. These findings have implications for inflammatory conditions like atopic dermatitis and diabetic wound healing.