2024-03-01 ペンシルベニア州立大学(PennState)
<関連情報>
- https://www.psu.edu/news/research/story/3d-printed-skin-closes-wounds-and-contains-hair-follicle-precursors/
- https://www.sciencedirect.com/science/article/pii/S2452199X23003493?via%3Dihub
ヒト脂肪由来幹細胞と細胞外マトリックスの術中バイオプリンティングにより、頭蓋顎顔面全層皮膚再建時に毛包様下垂と脂肪組織形成が誘導される Intraoperative bioprinting of human adipose-derived stem cells and extra-cellular matrix induces hair follicle-like downgrowths and adipose tissue formation during full-thickness craniomaxillofacial skin reconstruction
Youngnam Kang, Miji Yeo, Irem Deniz Derman, Dino J. Ravnic, Yogendra Pratap Singh, Mecit Altan Alioglu, Yang Wu, Jasson Makkar, Ryan R. Driskell, Ibrahim T. Ozbolat
Bioactive Materials Available online:9 November 2023
DOI:https://doi.org/10.1016/j.bioactmat.2023.10.034
Highlights
•Craniomaxillofacial reconstruction is a challenging clinical dilemma
•Skin was built by precise deposition of hypodermal and dermal components
•AdECM was bioprintable and exhibited de novo adipogenic capabilities
•Combinatorial delivery of adECM and ADSCs facilitated the reconstruction of skin
•Adipogenesis and downgrowth of hair follicle-like structures were achieved
Abstract
Craniomaxillofacial (CMF) reconstruction is a challenging clinical dilemma. It often necessitates skin replacement in the form of autologous graft or flap surgery, which differ from one another based on hypodermal/dermal content. Unfortunately, both approaches are plagued by scarring, poor cosmesis, inadequate restoration of native anatomy and hair, alopecia, donor site morbidity, and potential for failure. Therefore, new reconstructive approaches are warranted, and tissue engineered skin represents an exciting alternative. In this study, we demonstrated the reconstruction of CMF full-thickness skin defects using intraoperative bioprinting (IOB), which enabled the repair of defects via direct bioprinting of multiple layers of skin on immunodeficient rats in a surgical setting. Using a newly formulated patient-sourced allogenic bioink consisting of both human adipose-derived extracellular matrix (adECM) and stem cells (ADSCs), skin loss was reconstructed by precise deposition of the hypodermal and dermal components under three different sets of animal studies. adECM, even at a very low concentration such as 2 % or less, has shown to be bioprintable via droplet-based bioprinting and exhibited de novo adipogenic capabilities both in vitro and in vivo. Our findings demonstrate that the combinatorial delivery of adECM and ADSCs facilitated the reconstruction of three full-thickness skin defects, accomplishing near-complete wound closure within two weeks. More importantly, both hypodermal adipogenesis and downgrowth of hair follicle-like structures were achieved in this two-week time frame. Our approach illustrates the translational potential of using human-derived materials and IOB technologies for full-thickness skin loss.
Graphical abstract
