Volume 13, Issue 11 pp. 2067-2076
RESEARCH ARTICLE

Alteration of the extracellular matrix and alpha-gal antigens in the rat lung scaffold reseeded using human vascular and adipogenic stromal cells

Yasumasa Hashimoto

Yasumasa Hashimoto

Department of Surgical Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan

Medical-Engineering Hybrid Professional Development Center, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan

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Tomoshi Tsuchiya

Tomoshi Tsuchiya

Department of Surgical Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan

Translational Research Center, Research Institute for Science and Technology, Tokyo University of Science, Chiba, Japan

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Ryoichiro Doi

Ryoichiro Doi

Department of Surgical Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan

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Keitaro Matsumoto

Keitaro Matsumoto

Department of Surgical Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan

Medical-Engineering Hybrid Professional Development Center, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan

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Yoshikazu Higami

Yoshikazu Higami

Translational Research Center, Research Institute for Science and Technology, Tokyo University of Science, Chiba, Japan

Laboratory of Molecular Pathology and Metabolic Disease, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan

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Eiji Kobayashi

Eiji Kobayashi

Center for Development of Advanced Medical Technology, Jichi Medical University, Tochigi, Japan

Department of Organ Fabrication, Keio University School of Medicine, Tokyo, Japan

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Takeshi Nagayasu

Corresponding Author

Takeshi Nagayasu

Department of Surgical Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan

Medical-Engineering Hybrid Professional Development Center, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan

Correspondence

Takeshi Nagayasu, Department of Surgical Oncology, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan.

Email: [email protected]

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First published: 02 July 2019
Citations: 12

Abstract

Regenerated organs are expected to solve the problem of donor organ shortage in transplantation medicine. One approach to lung regeneration is to decellularize the organ and reseed it with selected cells. An advantage of the procedure is reduced immunogenicity, because all cells can be theoretically replaced by autologous cells. However, little is known regarding the extracellular matrix (ECM) damage during decellularization and ECM reconstruction process in the organ regeneration. We aimed to evaluate ECM damage and reconstruction of the decellularized–recellularized rat lung, including the removal of alpha-gal xenoantigens. Rat lungs were perfused with sodium dodecyl sulfate and Triton X-100 via the pulmonary artery, after which the decellularized scaffold was reseeded with rat or human endothelial cells and adipose-derived stem cell (ASCs). The ECM and alpha-gal antigen were evaluated using immunohistochemistry, western blotting, and a glycosaminoglycan assay. Alcian blue staining revealed increased production of proteoglycan following the addition of ASCs to the rat lung recellularized with rat lung microvascular endothelial cells. Glycosaminoglycan levels decreased in the decellularized lung and increased in the recellularized lung, especially in the ASC-treated group. Immunohistochemical expression of the alpha-gal protein was decreased to an undetectable level in the decellularized lung tissue and disappeared after recellularization with human cells. In western blot analysis, the bands of alpha-gal protein almost disappeared after recellularization with human cells. In conclusion, characteristics of the regenerated ECM might depend on the species and type of cells used for recellularization. Therefore, alpha-gal antigen might be eliminated after a prolonged culture, when using human cells.

CONFLICT OF INTEREST

The authors have declared that there is no conflict of interest.

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