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Immunologic consequences of transplantation

R J Keenan1, A Zeevi

  • 1Division of Cardiothoracic Surgery, University of Pittsburgh Medical Center, Pennsylvania, USA.

Chest Surgery Clinics of North America
|February 1, 1995
PubMed
Summary
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Lung transplant rejection remains a challenge, with chronic rejection leading to long-term complications. Alloimmune responses and infections like CMV are key factors, necessitating improved therapies for better patient outcomes.

Area of Science:

  • Immunology
  • Transplantation Medicine
  • Pulmonology

Background:

  • Rejection is a common complication following lung transplantation, impacting long-term patient survival.
  • While acute rejection is often manageable, chronic rejection poses a significant threat, leading to progressive lung allograft dysfunction and mortality.
  • The exact mechanisms driving chronic rejection are still being elucidated, but alloimmune responses are recognized as critical factors.

Purpose of the Study:

  • To review the current understanding of rejection following lung transplantation.
  • To highlight the role of alloimmune responses and infections in the development of chronic lung allograft dysfunction.
  • To discuss potential strategies for improving long-term outcomes in lung transplant recipients.

Main Methods:

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  • This study is a review of existing literature on lung transplantation and rejection.
  • It synthesizes findings from various studies investigating the pathogenesis and clinical course of lung allograft rejection.
  • The review focuses on the impact of immunosuppressive therapy, acute rejection episodes, and infections, particularly cytomegalovirus (CMV).

Main Results:

  • Alloimmune responses are fundamental to the development of lung allograft rejection.
  • Acute rejection and cytomegalovirus (CMV) infection appear to increase the risk of chronic rejection and subsequent graft dysfunction.
  • Chronic lung allograft dysfunction, characterized by obstructive physiology (OB), often leads to continuous loss of lung function despite immunosuppression.

Conclusions:

  • Improving long-term outcomes for lung transplant recipients requires advancements in immunosuppressive agents.
  • More targeted therapies, such as the induction of donor-specific tolerance, are crucial for mitigating chronic rejection.
  • Addressing alloimmune responses and managing infections are key to preventing graft loss and improving survival after lung transplantation.