title: Biological and clinical availability of adipose-derived stem cells for pelvic dead space repair.
abstract: Adipose-derived stem cells (ADSCs) are a very attractive cell source for regenerative and reconstructive medicine. Although ADSCs have already been used in cardiovascular disease and cosmetic surgery, they have not yet been used in gastroenterological surgery. In this study, we clarified the utility of the combined application of ADSCs and resected intraperitoneal fatty tissues as a sealant for the pelvic dead space that sometimes causes severe and fatal complications in colorectal and gynecological surgeries. In pelvic dead space model mice, mouse ADSCs efficiently maintained transplanted intraperitoneal fatty tissues without any incidence of adhesion to surrounding organs. In vivo and in vitro analyses revealed that transplanted ADSCs differentiated into endothelial cells by expressing the angiogenic factors vascular endothelial growth factor and hepatocyte growth factor. Mouse and human ADSCs contained a CD45(-)CD34(+) subset possessing high colony formation and sphere formation abilities. In addition, the CD45(-)CD34(+) subset consisted of two characteristic subsets: the CD34(+)CD90(+) angiogenic subset and the CD34(+)CD90(-) adipogenic subset. Grafts of human ADSCs with fat transplanted into mice were efficiently maintained for more than 12 months without volume reductions. A comparative study of graft maintenance efficacy between cultured human ADSCs and freshly isolated ADSCs indicated that the cultivation of ADSCs decreased their graft maintenance ability. These findings suggested that the angiogenic and adipogenic subsets act in coordination with each other and are essential for efficient graft maintenance.
authors.affiliation: Department of Gastroenterological Surgery, Osaka University, Osaka, Japan.
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Takahashi
authors.forename: Naotsugu
authors.initials: N
authors.lastname: Haraguchi
authors.forename: Shimpei
authors.initials: S
authors.lastname: Nishikawa
authors.forename: Susumu
authors.initials: S
authors.lastname: Miyazaki
authors.forename: Yozou
authors.initials: Y
authors.lastname: Suzuki
authors.forename: Tsunekazu
authors.initials: T
authors.lastname: Mizushima
authors.forename: Junichi
authors.initials: J
authors.lastname: Nishimura
authors.forename: Ichirou
authors.initials: I
authors.lastname: Takemasa
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Yamamoto
authors.forename: Koshi
authors.initials: K
authors.lastname: Mimori
authors.forename: Hideshi
authors.initials: H
authors.lastname: Ishii
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Doki
authors.forename: Masaki
authors.initials: M
authors.lastname: Mori
mesh_terms: D017667:Adipocytes; D050156:Adipogenesis; D000273:Adipose Tissue / Q000166:cytology* / Q000637:transplantation*; D000818:Animals; D018952:Antigens, CD34 / Q000032:analysis; D002454:Cell Differentiation; D049109:Cell Proliferation; D002478:Cells, Cultured; D042783:Endothelial Cells / Q000502:physiology; D006085:Graft Survival; D017228:Hepatocyte Growth Factor / Q000378:metabolism; D006801:Humans; D017493:Leukocyte Common Antigens / Q000032:analysis; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D008819:Mice, Nude; D018919:Neovascularization, Physiologic; D010388:Pelvis; D019651:Plastic Surgery Procedures; D033581:Stem Cell Transplantation; D013234:Stem Cells / Q000502:physiology*; D018800:Thy-1 Antigens / Q000032:analysis; D019737:Transplants; D042461:Vascular Endothelial Growth Factor A / Q000378:metabolism
chemical_list: D018952:Antigens, CD34; D018800:Thy-1 Antigens; D042461:Vascular Endothelial Growth Factor A; D017228:Hepatocyte Growth Factor; D017493:Leukocyte Common Antigens