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Jinno C, Morimoto N, Mahara A, Liem PH, Sakamoto M, Ogino S, Kakudo N, Inoie M, Fujisato T, Kusumoto K, Suzuki S, Yamaoka T. Inactivation of Human Nevus Tissue Using High Hydrostatic Pressure for Autologous Skin Reconstruction: A Novel Treatment for Giant Congenital Melanocytic Nevi. Tissue Eng Part C Methods 2015; 21:1178-87. [PMID: 26121117 DOI: 10.1089/ten.tec.2015.0054] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Giant congenital melanocytic nevi are intractable lesions associated with a risk of melanoma. High hydrostatic pressure (HHP) technology is a safe physical method for producing decellularized tissues without chemicals. We have reported that HHP can inactivate cells present in various tissues without damaging the native extracellular matrix (ECM). The objectives of this study were to inactivate human nevus tissue using HHP and to explore the possibility of reconstructing skin using inactivated nevus in combination with cultured epidermis (CE). Human nevus specimens 8 mm in diameter were pressurized by HHP at 100, 200, 500, and 1000 MPa for 10 min. The viability of specimens just after HHP, outgrowth of cells, and viability after cultivation were evaluated to confirm the inactivation by HHP. Histological evaluation using hematoxylin-eosin staining and immunohistochemical staining for type IV collagen was performed to detect damage to the ECM of the nevus. The pressurized nevus was implanted into the subcutis of nude mice for 6 months to evaluate the retention of human cells. Then, human CE was applied on the pressurized nevus and implanted into the subcutis of nude mice. The viability of pressurized nevus was not detected just after HHP and after cultivation, and outgrowth of fibroblasts was not observed in the 200, 500, and 1000 MPa groups. Human cells were not observed after 6 months of implantation in these groups. No apparent damage to the ECM was detected in all groups; however, CE took on nevus in the 200 and 500 MPa groups, but not in the 1000 MPa group. These results indicate that human nevus tissue was inactivated by HHP at more than 200 MPa; however, HHP at 1000 MPa might cause damage that prevents the take of CE. In conclusion, all cells in nevus specimens were inactivated after HHP at more than 200 MPa and this inactivated nevus could be used as autologous dermis for covering full-thickness skin defects after nevus removal. HHP between 200 and 500 MPa will be optimal to reconstruct skin in combination with cultured epidermal autograft without damage to the ECM.
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Affiliation(s)
- Chizuru Jinno
- 1 Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Naoki Morimoto
- 2 Department of Plastic and Reconstructive Surgery, Kansai Medical University, Hirakata, Japan
| | - Atsushi Mahara
- 3 Department of Biomedical Engineering, National Cerebral and Cardiovascular Center Research Institute, Suita, Japan
| | - Pham Hieu Liem
- 1 Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Michiharu Sakamoto
- 1 Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Shuichi Ogino
- 1 Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Natsuko Kakudo
- 2 Department of Plastic and Reconstructive Surgery, Kansai Medical University, Hirakata, Japan
| | | | - Toshia Fujisato
- 5 Department of Biomedical Engineering, Osaka Institute of Technology, Osaka, Japan
| | - Kenji Kusumoto
- 2 Department of Plastic and Reconstructive Surgery, Kansai Medical University, Hirakata, Japan
| | - Shigehiko Suzuki
- 1 Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Tetsuji Yamaoka
- 3 Department of Biomedical Engineering, National Cerebral and Cardiovascular Center Research Institute, Suita, Japan
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