Open Access
CC BY-NC 4.0 · Arch Plast Surg 2013; 40(02): 141-153
DOI: 10.5999/aps.2013.40.2.141
Continuing Medical Education

Composite Tissue Allotransplantation Immunology

Seok Chan Eun
Department of Plastic and Reconstructive Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
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INTRODUCTION

Composite tissue allotransplantation (CTA) is an option recently introduced for major reconstruction of tissue defects. Since announcements of successful hand, larynx, knee, muscle, nerve, abdominal wall and, most recently, partial face transplantation, CTA has become one of the techniques used by plastic and reconstructive surgeons [[1]]. Clinical success in CTA is the culmination of progress in two disparate surgical disciplines: replantation and organ transplantation, a close collaboration between plastic and transplant surgeons. This joining of reconstructive and transplant surgery forces the movement of hand and facial tissue allotransplantation into the clinical arena [[2]]. Translation to the clinical field has shown that CTA is a viable treatment option for those who have lost extremities and suffered large tissue defects [[3] [4] [5]].

As with other allografts, CTA can undergo immune-mediated rejection. When compared with solid organ transplants, composite tissue allografts are histologically heterogeneous, composed of different tissue types (e.g., skin, muscle, bone, bone marrow, lymph nodes, nerve, and tendon), and express different immunogenicity of transplanted elements [[6]]. Currently, the most important issue for routine application of CTA to clinical practice is the need for lifelong immunosuppression [[7]]. The immunosuppression medications used to prevent tissue rejection in CTA are the same as those used in tens of thousands of solid organ transplant recipients. The toxicity of chronic, nonspecific immunosuppression remains a major limitation to the widespread availability of CTA and is associated with opportunistic infections, nephrotoxicity, end-organ damage, and an increased rate of malignancy [[6]]. Because composite tissue allograft transplantations are not life-saving procedures, much attention has been devoted to the issue of minimizing or withdrawing immunosuppression, and this would represent a significant step forward in this field [[8]]. Over the past five to six decades, advances in the field of transplant immunology have transformed solid organ transplantation into standard care, with excellent short term results in kidney, heart, lung, liver, and pancreas transplantation. The science of CTA is rooted in progressive thinking and the innovative solutions of plastic surgeons. Development of a tolerance regimen or new less toxic immunosuppressive protocols is essential for future acceptance of CTA [[9]]. With cautious optimism and healthy critiques, the science of CTA promises a bright future. This paper reviews key terminology, drug combinations, mechanisms of immunosuppression, the risks associated with CTA, and immune tolerance protocols.



Publikationsverlauf

Eingereicht: 03. Januar 2013

Angenommen: 09. Januar 2013

Artikel online veröffentlicht:
01. Mai 2022

© 2013. The Korean Society of Plastic and Reconstructive Surgeons. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonCommercial License, permitting unrestricted noncommercial use, distribution, and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes. (https://creativecommons.org/licenses/by-nc/4.0/)

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