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Related Experiment Videos

ICAM-1 antisense oligodeoxynucleotide improves islet allograft survival and function.

S M Katz1, F Bennett, K Stecker

  • 1Department of Surgery, The University of Texas Medical School at Houston, 77030, USA. stephen.katz@uth.tme.edu

Cell Transplantation
|February 24, 2001
PubMed
Summary

Blocking intercellular adhesion molecule-1 (ICAM-1) and leukocyte function antigen-1 (LFA-1) significantly prolongs pancreatic islet allograft survival and improves early function. Dual blockade therapy proved most effective in extending graft survival and enhancing islet function.

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Area of Science:

  • Immunology
  • Transplantation Biology
  • Cellular and Molecular Medicine

Background:

  • Intercellular adhesion molecule-1 (ICAM-1) and leukocyte function antigen-1 (LFA-1) play critical roles in immune responses following pancreatic islet transplantation.
  • Their expression can influence both non-specific and alloantigen-specific phases of islet graft rejection.

Purpose of the Study:

  • To investigate the therapeutic potential of blocking the ICAM-1/LFA-1 pathway on pancreatic islet allograft survival and function.
  • To compare the efficacy of single versus dual blockade strategies.

Main Methods:

  • Pancreatic islets from C57BL/10 mice were transplanted into C3H mice via renal subcapsular space (KC) or portal vein (PV) injection.
  • Recipients were treated with ICAM-1 antisense oligodeoxynucleotide (oligo), anti-ICAM-1 monoclonal antibody (mAb), anti-LFA-1 mAb, or combinations thereof.

Related Experiment Videos

  • Donor pretreatment strategies were also evaluated.
  • Graft survival, glucose tolerance tests, and inflammatory markers were assessed.

    • Main Results:

    • Single agent blockade (ICAM-1 oligo, anti-ICAM-1 mAb, or anti-LFA-1 mAb) significantly prolonged KC islet allograft survival compared to controls.
    • Dual blockade using ICAM-1 oligo/anti-LFA-1 mAb or anti-ICAM-1 mAb/anti-LFA-1 mAb demonstrated superior efficacy in extending graft survival.
    • Combined donor pretreatment and recipient treatment further enhanced graft survival.
    • ICAM-1/LFA-1 blockade improved islet function and reduced inflammation.

    Conclusions:

    • ICAM-1/LFA-1 blockade is a promising strategy for prolonging pancreatic islet allograft survival.
    • Dual blockade therapies offer enhanced therapeutic benefits over single agent treatments.
    • This approach also improves early graft function and reduces inflammatory processes post-transplantation.