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Co-transplantation of mesenchymal stem cells with islet grafts

  • Author / Creator
    Hayward, Julie A
  • Mesenchymal stem cells (MSCs) have immuno-regulatory, anti-inflammatory, and pro-angiogenic properties through the secretion of a myriad of trophic factors, and have been shown to have a beneficial effect on graft function. In this thesis we investigated whether MSCs’ have an effect on neonatal porcine islets (NPIs) in vitro and in vivo. For the in vitro studies, NPIs were cultured with or without MSCs for 48 hours and a glucose stimulated insulin secretion (GSIS) assay was administered. NPIs cultured with MSCs had higher cellular insulin content and improved GSIS. For in vivo studies, NPIs cultured with or without MSC were transplanted under the kidney capsule of streptozotocin-induced diabetic B6.129S7-Rag1tm1Mom/J mice and glycemia and weight were measured weekly. An oral glucose tolerance test was administered when mice reached normoglycemia. Co-transplantation of NPIs and MSCs resulted in earlier reversal of diabetes, improved glucose tolerance, higher insulin content and improved vascularization. One experiment conducted with MSCs from a donor with an autoimmune disease resulted in no improved transplant outcomes. Co-transplantation of human MSCs with NPIs is demonstrated to have a beneficial effect on transplant outcomes, likely due to improved early vascularization and islet insulin secretion. Furthermore, donor pathology can impact MSC properties.

  • Subjects / Keywords
  • Graduation date
    2017-11
  • Type of Item
    Thesis
  • Degree
    Master of Science
  • DOI
    https://doi.org/10.7939/R36T0H926
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
  • Language
    English
  • Institution
    University of Alberta
  • Degree level
    Master's
  • Department
    • Department of Surgery
  • Supervisor / co-supervisor and their department(s)
    • Korbutt, Gregory (Surgery)
  • Examining committee members and their departments
    • Korbutt, Gregory (Surgery)
    • Postovit, Lynne (Oncology)
    • Churchill, Tom (Surgery)
    • Adesida, Adetola (Surgery)