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Related Experiment Videos

Microchimerism and rejection: a meta-analysis.

A Sahota1, S Gao, J Hayes

  • 1Department of Genetics, Rutgers University, NJ, USA.

Clinical Transplantation
|August 17, 2000
PubMed
Summary
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Microchimerism impacts graft rejection differently across organs, with bone marrow infusion also showing varied effects. More research is needed to understand these complex relationships in organ transplantation.

Area of Science:

  • Immunology
  • Transplantation Medicine
  • Cellular Biology

Background:

  • Microchimerism, the presence of donor cells in recipients, is a known phenomenon post-transplantation.
  • Donor bone marrow infusion is a strategy explored to improve transplant outcomes.
  • Understanding the interplay between microchimerism, bone marrow infusion, and graft rejection is crucial for optimizing transplant success.

Purpose of the Study:

  • To investigate the relationship between microchimerism and graft rejection in kidney, liver, heart, and lung transplant recipients.
  • To assess the influence of donor bone marrow infusion on graft rejection in these transplant types.
  • To analyze the time-dependent effects of microchimerism and bone marrow infusion on rejection episodes.

Main Methods:

  • Systematic review and selection of 37 clinical studies published between 1991 and 1997.

Related Experiment Videos

  • Exclusion of 16 studies due to duplication or insufficient data.
  • Application of mixed-effect logistic models and logistic regression to analyze rejection rates, microchimerism, and bone marrow infusion across different organs and time points.

    • Main Results:

    • Microchimerism was linked to increased acute rejection in heart, lung, and kidney transplants, but decreased rejection in liver transplants, particularly beyond 12 months.
    • Bone marrow infusion reduced acute rejection risk in heart transplants but increased it in lung and liver transplants; its effect on kidney transplants was inconsistent.
    • Microchimerism showed a trend towards decreased chronic rejection in lung transplants at 12 months and beyond, with insufficient data for other organs.

    Conclusions:

    • Microchimerism was prevalent in the majority of transplant recipients studied.
    • The impact of microchimerism and bone marrow infusion on graft rejection is organ-specific and time-dependent.
    • Further extensive research into microchimerism and donor-specific hyporesponsiveness is warranted to improve transplant outcomes.