Structural and Compositional Characterization of a Human Adipose Allograft for Soft Tissue Volume Restoration

Subcutaneous adipose tissue loss from trauma, congenital deformity, aging, or weight loss can compromise facial contour, symmetry, and soft-tissue support, making volume restoration a central target in soft-tissue reconstruction. Current approaches include autologous fat grafting, dermal fillers, and decellularized adipose matrices, each having distinct limitations related to tissue harvesting, material composition, durability, or absence of adipocyte structure. To address these limitations, dermaClaeTM was developed as a ready-to-use, minimally manipulated nonviable human structural adipose allograft for small volume applications in delicate areas, such as the face. This study characterizes the structural and compositional properties of dermaClae using histology, scanning electron microscopy (SEM), and biochemical assays to evaluate tissue structure, composition, and extracellular matrix (ECM) components relevant to tissue integration and remodeling. Histological and SEM analyses demonstrated adipocytes surrounded by collagen-rich connective tissue. Adipocyte cross-sectional area demonstrated overlapping distributions with native adipose tissue. Total collagen, laminin α4, proteoglycans, and elastin levels were all measured in dermaClae at concentrations higher than native adipose tissue. Retained adipocyte structures contribute to tissue bulk, cushioning, and support, while the ECM provides a structural framework relevant to incorporation and remodeling. Together, these characteristics may position dermaClae as a potential natural alternative to current approaches for facial reconstruction.