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Updated: Jan 11, 2026
Stromal Vascular Fraction-enriched Fat Grafting for the Treatment of Symptomatic End-neuromata
Published on: November 23, 2017
Exosome-Mediated Enhancement of Fat Graft Retention: A Comparative Preclinical Study with Stromal Vascular Fraction
Ying Zhu1, Ki Yong Hong2, Hak Chang3
1Department of Plastic and Reconstructive Surgery, Seoul National University College of Medicine, Seoul, Korea.
Background:
Cell-assisted lipotransfer (CAL) is a fat grafting technique that enhances graft survival by supplementing grafts with autologous stromal vascular fraction (SVF) or adipose-derived stromal cells (ASCs). However, its clinical translation has been hindered owing to inherent biological variability, potential cell viability issues, tumorigenic risk, and the complex regulatory landscape associated with cell-based therapies. To overcome these challenges, exosome has gained increasing attention as a promising non-cellular therapeutic modality capable of preserving key regenerative functions while minimizing relative concerns. This study aimed to compare the efficacy of SVF-enriched lipotransfer with fat co-transplanted with exosomes from ASCs to identify a reliable and clinically applicable non-cellular strategy for optimizing fat graft outcomes.
Methods:
In vivo, minced human fat tissue mixed with phosphate-buffered saline, SVF cells, or exosomes was grafted into nude mice. Grafts were evaluated through microcomputed tomography at weeks 4 and 8 post-grafting and histological analysis at weeks 1 and 8 post-grafting.
Results:
The exosome group showed a significantly higher volume retention rate than the control group at weeks 4 and 8 post-grafting. Histological analysis revealed that exosomes exhibited more pronounced effects in reducing inflammation, preserving perilipin-positive adipocytes, and promoting angiogenesis in the grafted fats compared with those of SVF cells.
Conclusions:
Our findings highlight the potential of exosomes in improving fat graft retention and overall tissue regeneration, suggesting that fat co-transplanted with exosomes from ASCs could serve as a superior alternative to SVF-enriched lipotransfer.
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