Adipose tissue regeneration in a 3D-printed poly(lactic acid) frame-supported space in the inguinal region of rats.

Bio-medical Materials and Engineering
Yusuke KambeTetsuji Yamaoka

Abstract

Adipose tissue engineering has been studied as an alternative to current options for breast reconstruction, such as lipofilling, flap reconstruction, and silicone implants. Previously, we demonstrated that a poly(L-lactic acid) mesh containing a collagen sponge, containing neither cells nor growth factors, could be filled with the regenerated adipose tissues when implanted in rodent models. However, the main factor contributing to adipogenesis remained unclear. We aimed to clarify whether adipogenesis can be achieved by the space provided by the mesh or by the bioactivity of collagen. A three-dimensional (3D) poly(lactic acid) (PLA) frame, which was stiff enough to maintain its shape, was fabricated by 3D printing. The frame with (PLA+ColI) or without (PLA only) a type I collagen hydrogel was implanted in the inguinal region of rats for up to 12 months. Adipose tissue regeneration in the PLA only and PLA+ColI groups was evaluated histologically. The 3D PLA frame maintained its structure for 12 months in vivo and oil red O (ORO)-positive adipose tissues were regenerated in the frame. No significant difference in the ORO-positive area was detected between the PLA only and PLA+ColI groups. The space supported by the frame was a ke...Continue Reading

References

Sep 2, 2008·Tissue Engineering. Part a·Wakako TsujiMasakazu Toi
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Nov 13, 2009·Journal of Periodontology·Olivier EtienneChristophe Egles
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May 27, 2017·Journal of Tissue Engineering and Regenerative Medicine·Shuichi OginoShigehiko Suzuki
Mar 1, 2019·Plastic and Reconstructive Surgery·David J CollettAnand K Deva
Sep 28, 2017·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Yusuke KambeTetsuji Yamaoka
Apr 16, 2020·Journal of Tissue Engineering and Regenerative Medicine·Shuichi OginoNaoki Morimoto

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