Related Experiment Video
Updated: Jul 6, 2026
10:43
Transplantation of Pancreatic Islets Into the Kidney Capsule of Diabetic Mice
Published on: October 31, 2007
HLA sensitization in islet transplantation
Michael R Rickels1, Jane Kearns, Eileen Markmann
1Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, University of Pennsylvania School of Medicine, Philadelphia, PA, USA.
Clinical Transplants
|March 28, 2008
Summary
Minimizing donor numbers and ensuring HLA compatibility can improve islet transplant success for type 1 diabetes. Monitoring for HLA sensitization is crucial, especially when reducing immunosuppression or if graft function declines.
Area of Science:
- Immunology
- Transplantation
- Endocrinology
Background:
- Islet transplantation is a promising therapy for type 1 diabetes, often requiring multiple HLA-mismatched donors.
- Human Leukocyte Antigen (HLA) sensitization frequently occurs after reducing immunosuppression, potentially impairing islet graft function.
Observation:
- Increased HLA class I mismatches correlate with a higher risk of sensitization.
- Pre-transplant screening, including cross-matching and assessment of sensitization levels (PRA), is vital.
- Post-transplant monitoring for HLA sensitization is recommended during immunosuppression changes or graft dysfunction.
Findings:
- Recommendations for optimizing islet transplantation include minimizing donor numbers, performing negative cross-matches, avoiding antigen mismatches in sensitized patients, and sensitive monitoring for alloantibodies.
Implications:
- These strategies aim to reduce HLA sensitization, thereby improving long-term islet graft survival and insulin independence in type 1 diabetes patients.
- Future protocols should incorporate these evidence-based recommendations to enhance therapeutic outcomes.
Related Concept Videos
01:24Tissue Transplantation
Tissue transplantation is a significant medical procedure involving the transfer of cells, tissues, or organs from a donor to a recipient, with the primary aim of restoring lost functions. This procedure is crucial in treating a broad spectrum of diseases, including kidney diseases, liver failure, heart disease, and certain types of cancers.
The Biology of Tissue Transplantation
The biology of tissue transplantation hinges on the Major Histocompatibility Complex (MHC) molecules. These molecules...
The Biology of Tissue Transplantation
The biology of tissue transplantation hinges on the Major Histocompatibility Complex (MHC) molecules. These molecules...
01:40Cell-mediated Immune Responses
Overview
01:26Type I Diabetes II: Pathophysiology
Type 1 diabetes mellitus arises from an immune-mediated destruction of pancreatic β-cells, resulting in an absolute deficiency of insulin. This process develops in genetically susceptible individuals when autoimmunity, environmental exposures, and immunologic dysregulation converge to trigger a targeted attack on the insulin-producing cells of the pancreas. The β-cells are located within the islets of Langerhans and are essential for regulating blood glucose by facilitating cellular uptake of...
01:12Type I Diabetes I: Introduction
Type 1 diabetes mellitus is a chronic metabolic disorder characterized by an absolute deficiency of insulin resulting from the autoimmune destruction of pancreatic β-cells. Although it can occur at any age, it is most commonly diagnosed in childhood, adolescence, or early adulthood. The loss of insulin production impairs cellular glucose uptake, resulting in persistent hyperglycemia and necessitating lifelong insulin therapy.Autoimmune Destruction of β-CellsThe hallmark of type 1 diabetes is an...