title: Engraftment of cells from porcine islets of Langerhans following transplantation of pig pancreatic primordia in non-immunosuppressed diabetic rhesus macaques.
abstract: Transplantation therapy for human diabetes is limited by the toxicity of immunosuppressive drugs. If toxicity can be minimized, there will still be a shortage of human donor organs. Xenotransplantation of porcine islets is a strategy to overcome supply problems. Xenotransplantation in mesentery of pig pancreatic primordia obtained very early during organogenesis [embryonic day 28 (E28)] is a way to obviate the need for immunosuppression in rats or rhesus macaques and to enable engraftment of a cell component originating from porcine islets implanted beneath the renal capsule of rats. Here, we show engraftment in the kidney of insulin and porcine proinsulin mRNA-expressing cells following implantation of porcine islets beneath the renal capsule of diabetic rhesus macaques transplanted previously with E28 pig pancreatic primordia in mesentery. Donor cell engraftment is confirmed using fluorescent in situ hybridization (FISH) for the porcine X chromosome and is supported by glucose-stimulated insulin release in vitro. Cells from islets do not engraft in the kidney without prior transplantation of E28 pig pancreatic primordia in mesentery. This is the first report of engraftment following transplantation of porcine islets in non-immunosuppressed, immune-competent non-human primates. The data are consistent with tolerance to a cell component of porcine islets induced by previous transplantation of E28 pig pancreatic primordia.
authors.affiliation: Washington University School of Medicine, St. Louis, MO, USA.
authors.forename: Sharon A
authors.initials: SA
authors.lastname: Rogers
authors.forename: Piyush
authors.initials: P
authors.lastname: Tripathi
authors.forename: Thalachallour
authors.initials: T
authors.lastname: Mohanakumar
authors.forename: Helen
authors.initials: H
authors.lastname: Liapis
authors.forename: Feng
authors.initials: F
authors.lastname: Chen
authors.forename: Michael R
authors.initials: MR
authors.lastname: Talcott
authors.forename: Chad
authors.initials: C
authors.lastname: Faulkner
authors.forename: Marc R
authors.initials: MR
authors.lastname: Hammerman
mesh_terms: D000818:Animals; D003921:Diabetes Mellitus, Experimental / Q000276:immunology / Q000473:pathology* / Q000628:therapy; D004622:Embryo, Mammalian; D006085:Graft Survival; D007165:Immunosuppression Therapy; D007328:Insulin / Q000235:genetics / Q000378:metabolism; D000078790:Insulin Secretion; D007515:Islets of Langerhans / Q000473:pathology; D016381:Islets of Langerhans Transplantation / Q000276:immunology; D007668:Kidney / Q000473:pathology; D008253:Macaca mulatta; D008643:Mesentery / Q000601:surgery; D016035:Pancreas Transplantation; D011384:Proinsulin / Q000235:genetics / Q000378:metabolism; D012333:RNA, Messenger / Q000378:metabolism; D013552:Swine; D014183:Transplantation, Heterologous / Q000276:immunology
chemical_list: D007328:Insulin; D012333:RNA, Messenger; D011384:Proinsulin