Systemic Administration of Adipose-Derived Stromal Cells Concurrent with Fat Grafting.

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

Background Cell-assisted lipotransfer, a technique involving free fat grafting mixed with adipose-derived stromal cells, has gained popularity for enhancing fat graft retention. In terms of stem cell delivery, intravenous injection can be a novel alternative with clinical value. However, the effects of intravenously injected adipose-derived stromal cells concurrent with fat grafting have not been described. The authors investigated the histologic and microenvironmental changes in grafted fat when adipose-derived stromal cells were injected intravenously concurrent with grafting. Methods Using a modified animal model of cell-assisted lipotransfer, adipose tissue from green fluorescent protein-expressing C57BL/6J (B6) mice was grafted into recipient wild-type B6 mice, followed by intravenous injection of adipose-derived stromal cells from DsRed-expressing B6 mice. The distribution of adipose-derived stromal cells was evaluated using bioluminescent imaging, and graft volume was measured using micro-computed tomographic scans. Donor fat and adipose-derived stromal cells were traced using immunofluorescent staining. Results The authors identified the recruitment of adipose-derived stromal cells inside the graft after intravenous injection of adipose-derived stromal cells concurrent with grafting despite the arrest of cells in the lungs. Intravenous injection of adipose-derived strom

Evidence level

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

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