Tissue microenvironment of grafted fat

The tissue microenvironment of grafted fat is a complex biological niche comprising adipocytes, adipose-derived stem cells (ASCs), vascular components, and immune cells within an extracellular matrix (ECM). Following autologous fat transplantation, this environment is initially characterized by hypoxia and nutrient deprivation, leading to a survival zone, a regenerating zone, and a necrotic zone within the graft (PMID: 25503300). The success of the graft depends on the dynamic interplay between these components, particularly the ability of ASCs to promote angiogenesis and the transition of macrophages from a pro-inflammatory (M1) to a pro-remodeling (M2) phenotype (PMID: 31145171). While not a single molecular target, the microenvironment is a focus of therapeutic intervention using growth factors like VEGF or cell-based therapies to improve graft retention and reduce complications like fat necrosis or oil cysts (PMID: 28820831). Understanding this niche is critical for improving outcomes in reconstructive and aesthetic surgery.

Other names

Fat graft microenvironmentAdipose tissue graft nicheGrafted adipose tissue microenvironment

Modulation of the graft niche through paracrine signaling, promotion of neovascularization, and regulation of the inflammatory response to enhance adipocyte survival.