title: Transplantation of sertoli-islet cell aggregates formed by microgravity: prolonged survival in diabetic rats.
abstract: Transplantation of pancreatic islets is a potentially attractive treatment for type I diabetes. We generated the transplantable, tissue-like aggregates composed of Sertoli cells and islets in rotating wall vessel bioreactors, SICA (Sertoli-islet cell aggregates), to improve their biological function in vitro and in vivo. The isolated islet equivalent and Sertoli cells were purified from Wistar rats and cocultured for 5 days in bioreactor to generate SICA. The SICA, islets aggregates, and fresh isolated islets were transplanted under the kidney capsule of diabetic Sprague-Dawley (SD) rats, respectively. The functions of different grafts were ascertained by blood glucose level measurements and an in vivo glucose tolerance test. In response to elevated glucose, insulin secretion from SICA was 1.4-fold higher (P<0.05, n=5) than islet aggregates cultured alone. Of the rats that received SICA, 90% (9/10) remained normoglycemic at 60 days post-transplantation, and the survival significantly increased compared with recipients bearing homotypic islets aggregates or freshly isolated islets. The former responded similarly with healthy rats to the glucose tolerance test. Our results support the usefulness of SICA for the treatment of type 1 diabetes without any immunosuppressive agents.
authors.affiliation: Department of Tissue Engineering, Beijing Institute of Basic Medical Sciences and Tissue Engineering Research Center, Academy of Military Medical Sciences, 27 Taiping Road, Beijing 100850, PR China.
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Han
authors.forename: Liyuan
authors.initials: L
authors.lastname: Qiu
authors.forename: Ye
authors.initials: Y
authors.lastname: Zhang
authors.forename: Qingxue
authors.initials: Q
authors.lastname: Kong
authors.forename: Hong
authors.initials: H
authors.lastname: Wang
authors.forename: Haibin
authors.initials: H
authors.lastname: Wang
authors.forename: Hongbo
authors.initials: H
authors.lastname: Li
authors.forename: Cuimi
authors.initials: C
authors.lastname: Duan
authors.forename: Yanmeng
authors.initials: Y
authors.lastname: Wang
authors.forename: Ying
authors.initials: Y
authors.lastname: Song
authors.forename: Changyong
authors.initials: C
authors.lastname: Wang
mesh_terms: D000818:Animals; D002469:Cell Separation; D002478:Cells, Cultured; D003921:Diabetes Mellitus, Experimental / Q000473:pathology / Q000503:physiopathology / Q000628:therapy*; D003922:Diabetes Mellitus, Type 1 / Q000473:pathology / Q000503:physiopathology / Q000628:therapy; D005951:Glucose Tolerance Test; D007515:Islets of Langerhans / Q000648:ultrastructure; D016381:Islets of Langerhans Transplantation; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D017208:Rats, Wistar; D012708:Sertoli Cells / Q000637:transplantation* / Q000648:ultrastructure; D014184:Transplantation, Homologous; D014893:Weightlessness