Abstract
Background
In plastic surgery, autologous fat grafts (AFG) play an important role because of their abundant supply, biocompatibility, and low rejection rate. However, the lower retention rate of fat grafts limits their widespread use. Brown adipose tissue (BAT) can promote angiogenesis and regulate the level of associated inflammation. This study explored whether BAT has a facilitative effect on fat graft retention.
Methods
We obtained white adipose tissue (WAT) from c57 mice and combined it with either BAT from c57 mice or phosphate-buffered saline (PBS) as a control. These mixtures were injected subcutaneously into the back of thymus-free nude mice. After 12 weeks, fat grafts were harvested, weighed, and analyzed.
Results
We found that the BAT-grafted group had higher mass retention, more mature adipocytes, and higher vascularity than the other group. Further analysis revealed that BAT inhibited M1 macrophages; down-regulated IL-6, IL-1β, and TNF-β; upregulated M2 macrophages and Vascular endothelial growth factor-A (VEGFA); and promoted adipocyte regeneration by inhibiting the Wnt/β-catenin pathway, which together promoted adipose graft retention.
Conclusion
The study demonstrated that BAT improved adipose graft retention by promoting angiogenesis, inhibiting tissue inflammation levels and the Wnt/β-catenin pathway.
Level of Evidence III
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This study is suppoted by Natural Science Foundation of Anhui Province (2008085QC112).
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Zheng, Y., Li, H., Bao, Q. et al. Brown Adipose Tissue Promotes Autologous Fat Grafts Retention Possibly Through Inhibiting Wnt/β-Catenin Pathway. Aesth Plast Surg 48, 1817–1824 (2024). https://doi.org/10.1007/s00266-024-03888-4
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DOI: https://doi.org/10.1007/s00266-024-03888-4