Femtosecond laser-processed biodegradable porous membranes for cultivation and transplantation of three-dimensional skin substitutes

Yasuyuki Tsunoi; Izumi Takayama; Naonari Kondo; Yo Nagano; Hiromi Miyazaki; Taiichiro Ida; Mitsuru Akashi; Mitsuhiro Terakawa; Shunichi Sato

doi:10.1117/12.2688299

12 March 2024 Femtosecond laser-processed biodegradable porous membranes for cultivation and transplantation of three-dimensional skin substitutes

Yasuyuki Tsunoi, Izumi Takayama, Naonari Kondo, Yo Nagano, Hiromi Miyazaki, Taiichiro Ida, Mitsuru Akashi, Mitsuhiro Terakawa, Shunichi Sato

Author Affiliations +

Proceedings Volume 12816, Photonics in Dermatology and Plastic Surgery 2024; 1281609 (2024) https://doi.org/10.1117/12.2688299
Event: SPIE BiOS, 2024, San Francisco, California, United States

Abstract

We previously developed a pre-vascularized three-dimensional (3D) cultured human skin model, for which cells were cultured on a porous polymer membrane to supply a culture medium to the tissue. The model was transplanted onto a full-thickness skin defect in a mouse, showing the efficacy as a skin graft. However, there were difficulties in separating the cultured skins from the membranes, as well as in handling the separated soft skins for transplantation. To solve these problems, we recently developed biodegradable porous membranes that enable skin grafting together with the membranes. Poly (lactic-co-glycolic acid) (PLGA) thin films were irradiated with femtosecond laser pulses to create micro through-holes to produce porous membranes. The membrane showed complete decomposition in the mouse subcutaneous tissue within 35 days after implantation. Three-dimensional skins cultured on the membranes were then transplanted together with the membranes onto skin defects in mice, showing reepithelization in the grafted tissues. However, decomposition of the membrane was limited at the early-stage post-transplantation, and insufficient engraftment was observed in some cases. In this study, we increased the hole density of the PLGA membranes to improve their decomposition rate in tissue. We observed that the membrane was completely decomposed in the mouse subcutaneous tissue within 24 days after implantation. On the membranes, 3D skins containing vascular networks were cultivated. However, we encountered another problem that the mechanical strength of the membranes decreased with the increased hole density; some membranes were torn during skin cultivation. Considering this, we plan to further optimize the membrane conditions next.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yasuyuki Tsunoi, Izumi Takayama, Naonari Kondo, Yo Nagano, Hiromi Miyazaki, Taiichiro Ida, Mitsuru Akashi, Mitsuhiro Terakawa, and Shunichi Sato "Femtosecond laser-processed biodegradable porous membranes for cultivation and transplantation of three-dimensional skin substitutes", Proc. SPIE 12816, Photonics in Dermatology and Plastic Surgery 2024, 1281609 (12 March 2024); https://doi.org/10.1117/12.2688299

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