Perfusion bioreactor culture of adipose-derived stromal cells on decellularized adipose tissue scaffolds enhances in vivo regeneration

BioRxiv : the Preprint Server for Biology
Tim Tian Y Han, Lauren E Flynn

Abstract

Adipose tissue engineering holds promise to address the unmet need in plastic and reconstructive surgery for strategies that promote the stable and predictable regeneration of adipose tissue for volume augmentation applications. Previous studies have demonstrated that decellularized adipose tissue (DAT) scaffolds can provide a pro-adipogenic microenvironment, and that seeding with adipose-derived stromal cells (ASCs) can enhance in vivo angiogenesis and adipogenesis within DAT implants. Recognizing that bioreactor systems can promote cell expansion and infiltration on tissue-engineered scaffolds, this study evaluated the effects of culturing human ASCs on DAT scaffolds within a perfusion bioreactor. Using this system, the impact of both shear stress stimulation and hypoxic preconditioning were explored in vitro and in vivo. Initial studies compared the effects of 14 days of culture within the perfusion bioreactor under 2% O2 or ~20% O2 on human ASC expansion and hypoxic inducible factor 1 alpha (HIF-1) expression in vitro relative to static cultured controls. The findings indicated that culturing within the bioreactor under 2% O2 significantly increased ASC proliferation on the DAT, with a higher cell density observed in the sc...Continue Reading

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