1
|
Kodali NA, Janarthanan R, Sazoglu B, Demir Z, Dirican O, Zor F, Kulahci Y, Gorantla VS. A World Update of Progress in Lower Extremity Transplantation: What's Hot and What's Not. Ann Plast Surg 2024; 93:107-114. [PMID: 38885168 DOI: 10.1097/sap.0000000000004035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
ABSTRACT The field of vascularized composite allotransplantation (VCA) is the new frontier of solid organ transplantation (SOT). VCA spans life-enhancing/life-changing procedures such as upper extremity, craniofacial (including eye), laryngeal, tracheal, abdominal wall, penis, and lower extremity transplants. VCAs such as uterus transplants are life giving unlike any other SOT. Of all VCAs that have shown successful intermediate- to long-term graft survival with functional and immunologic outcomes, lower extremity VCAs have remained largely underexplored. Lower extremity transplantation (LET) can offer patients with improved function compared to the use of conventional prostheses, reducing concerns of phantom limb pain and stump complications, and offer an option for eligible amputees that either fail prosthetic rehabilitation or do not adapt to prosthetics. Nevertheless, these benefits must be carefully weighed against the risks of VCA, which are not trivial, including the adverse effects of lifelong immunosuppression, extremely challenging perioperative care, and delayed nerve regeneration. There have been 5 lower extremity transplants to date, ranging from unilateral or bilateral to quadrimembral, progressively increasing in risk that resulted in fatalities in 3 of the 5 cases, emphasizing the inherent risks. The advantages of LET over prosthetics must be carefully weighed, demanding rigorous candidate selection for optimal outcomes.
Collapse
Affiliation(s)
- Naga Anvesh Kodali
- Department of Surgery, Wake Forest School of Medicine, Winston Salem, NC
| | - Ramu Janarthanan
- Department of Surgery, Wake Forest School of Medicine, Winston Salem, NC
- Department of Plastic and Reconstructive Surgery, Amrita Institute of Medical Sciences and Research Centre, Amrita Vishwa Vidyapeetham, Kochi, India
| | - Bedreddin Sazoglu
- Department of Surgery, Wake Forest School of Medicine, Winston Salem, NC
| | - Zeynep Demir
- Department of Surgery, Wake Forest School of Medicine, Winston Salem, NC
| | - Omer Dirican
- Department of Surgery, Wake Forest School of Medicine, Winston Salem, NC
| | - Fatih Zor
- Department of Plastic Surgery, Indiana University, Indianapolis, IN
| | - Yalcin Kulahci
- Department of Surgery, Wake Forest School of Medicine, Winston Salem, NC
| | - Vijay S Gorantla
- Department of Surgery, Wake Forest School of Medicine, Winston Salem, NC
| |
Collapse
|
2
|
Noel OF, Dumbrava MG, Daoud D, Kammien AJ, Kauke-Navarro M, Pomahac B, Colen D. Vascularized Composite Allograft Versus Prosthetic for Reconstruction After Facial and Hand Trauma: Comparing Cost, Complications, and Long-term Outcome. Ann Plast Surg 2024; 92:100-105. [PMID: 37962243 DOI: 10.1097/sap.0000000000003731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
ABSTRACT In the past decade, vascularized composite allotransplantation (VCA) has become clinical reality for reconstruction after face and hand trauma. It offers patients the unique opportunity to regain form and function in a way that had only been achieved with traditional reconstruction or with the use of prostheses. On the other hand, prostheses for facial and hand reconstruction have continued to evolve over the years and, in many cases, represent the primary option for patients after hand and face trauma. We compared the cost, associated complications, and long-term outcomes of VCA with prostheses for reconstruction of the face and hand/upper extremity. Ultimately, VCA and prostheses represent 2 different reconstructive options with distinct benefit profiles and associated limitations and should ideally not be perceived as competing choices. Our work adds a valuable component to the general framework guiding the decision to offer VCA or prostheses for reconstruction after face and upper extremity trauma.
Collapse
Affiliation(s)
- Olivier F Noel
- From the Division of Plastic and Reconstructive Surgery, Yale-New Haven Hospital, Yale School of Medicine, New Haven, CT
| | | | - Deborah Daoud
- Department of Surgery, Rutgers New Jersey Medical School, Newark, NJ
| | - Alexander J Kammien
- From the Division of Plastic and Reconstructive Surgery, Yale-New Haven Hospital, Yale School of Medicine, New Haven, CT
| | - Martin Kauke-Navarro
- From the Division of Plastic and Reconstructive Surgery, Yale-New Haven Hospital, Yale School of Medicine, New Haven, CT
| | - Bohdan Pomahac
- From the Division of Plastic and Reconstructive Surgery, Yale-New Haven Hospital, Yale School of Medicine, New Haven, CT
| | - David Colen
- From the Division of Plastic and Reconstructive Surgery, Yale-New Haven Hospital, Yale School of Medicine, New Haven, CT
| |
Collapse
|
3
|
He J, Khan UZ, Qing L, Wu P, Tang J. Improving the ischemia-reperfusion injury in vascularized composite allotransplantation: Clinical experience and experimental implications. Front Immunol 2022; 13:998952. [PMID: 36189311 PMCID: PMC9523406 DOI: 10.3389/fimmu.2022.998952] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 08/29/2022] [Indexed: 11/21/2022] Open
Abstract
Long-time ischemia worsening transplant outcomes in vascularized composite allotransplantation (VCA) is often neglected. Ischemia-reperfusion injury (IRI) is an inevitable event that follows reperfusion after a period of cold static storage. The pathophysiological mechanism activates local inflammation, which is a barrier to allograft long-term immune tolerance. The previous publications have not clearly described the relationship between the tissue damage and ischemia time, nor the rejection grade. In this review, we found that the rejection episodes and rejection grade are usually related to the ischemia time, both in clinical and experimental aspects. Moreover, we summarized the potential therapeutic measures to mitigate the ischemia-reperfusion injury. Compare to static preservation, machine perfusion is a promising method that can keep VCA tissue viability and extend preservation time, which is especially beneficial for the expansion of the donor pool and better MHC-matching.
Collapse
Affiliation(s)
- Jiqiang He
- Department of Hand and Microsurgery, Xiangya Hospital of Central South University, Changsha, China
| | - Umar Zeb Khan
- Department of Hand and Microsurgery, Xiangya Hospital of Central South University, Changsha, China
| | - Liming Qing
- Department of Hand and Microsurgery, Xiangya Hospital of Central South University, Changsha, China
| | - Panfeng Wu
- Department of Hand and Microsurgery, Xiangya Hospital of Central South University, Changsha, China
| | - Juyu Tang
- Department of Hand and Microsurgery, Xiangya Hospital of Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital of Central South University, Changsha, China
- *Correspondence: Juyu Tang,
| |
Collapse
|
4
|
Benedict J. Patient Advocacy in Vascularized Composite Allotransplantation. Front Psychol 2022; 13:943393. [PMID: 35923735 PMCID: PMC9340068 DOI: 10.3389/fpsyg.2022.943393] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 06/21/2022] [Indexed: 11/13/2022] Open
|
5
|
Bumbaširević M, Matić S, Palibrk T, Glišović Jovanović I, Mitković M, Lesić A. Mangled extremity- Modern concepts in treatment. Injury 2021; 52:3555-3560. [PMID: 33766434 DOI: 10.1016/j.injury.2021.03.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 03/09/2021] [Indexed: 02/02/2023]
Abstract
A mangled extremity is the most devastating limb injury and presents a challenge for the orthopedic surgeon. There are two main treatment options, reconstruction or amputation, but sometimes indications for either are not clear. There are many pro and contra arguments for both options. To make the decision easier numerous score systems have been introduced, but the final decision is based on the judgment and experience of the treating surgeon. Early extremity reconstruction appears to give better results than delayed or late reconstruction and should be the treatment of choice where possible. The goal in reconstruction of a lower extremity is to restore and maintain balance and ambulation, while restoration of an upper extremity's numerous functions is more demanding. In this paper the authors describe and suggest treatment approaches in patients with a severely mangled extremity, including assessment and treatment of all injured tissues, using defined protocols, with special attention to bone stabilization, revascularization, soft-tissue coverage and nerve reconstruction. These have a great impact on the outcome and function of the injured extremity. Rehabilitation and return to the preinjury level is slow and sometimes uncertain.
Collapse
Affiliation(s)
- M Bumbaširević
- School of Medicine, University of Belgrade; Clinic for orthopedic surgery and traumatology, Clinical Centre of Serbia; Serbian Academy of Sciences and Arts, Belgrade
| | - S Matić
- School of Medicine, University of Belgrade; Clinic for orthopedic surgery and traumatology, Clinical Centre of Serbia
| | - T Palibrk
- School of Medicine, University of Belgrade; Clinic for orthopedic surgery and traumatology, Clinical Centre of Serbia
| | | | - M Mitković
- Clinic for orthopedic surgery and traumatology, Clinical Centre Nis
| | - A Lesić
- School of Medicine, University of Belgrade; Clinic for orthopedic surgery and traumatology, Clinical Centre of Serbia
| |
Collapse
|
6
|
Tombak K, Özkan Ö, Uysal H, Özkan Ö. An Individualized Physiotherapy and Rehabilitation Program for Bilateral Hand Transplantations. Ann Plast Surg 2021; 86:217-222. [PMID: 33449466 DOI: 10.1097/sap.0000000000002668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
METHODS This article describes a rehabilitation program and the long-term results after its application in 2 double-hand transplantation patients after 9- and 4-year follow-up periods. A personal rehabilitation program was planned to commence as early as possible after postoperative patient stabilization. Splinting, edema, positioning, passive and active joint movements, daily life activity modification and education, and occupational therapy were also emphasized. RESULTS Positioning, edema, and passive joint movements were started in the acute phase. Strengthening and exercises were continued for 8 weeks and later for functional gains and adaptation to daily living activities. Subjective and overall results were quite satisfactory. The Hand Transplantation Score System, Disabilities of the Arm Shoulder and Hand, Semmes Weinstein Monofilaments, sensory tests, and modified Kapandji index improvements were all within good acceptable ranges. Although rapid recovery and functional development were observed in the first 4 years, these are still continuing at the time of writing. DISCUSSION The most important determining factors in the success of rehabilitation are to return to daily life and the ability to acquire functional skills. Long-term follow-up of the patients in this study showed that they were able to return to their independent daily lives and that external assistance decreased to a minimum.
Collapse
Affiliation(s)
- Kadriye Tombak
- From the Faculty of Medicine, Department of Physical Medicine and Rehabilitation
| | - Özlenen Özkan
- Faculty of Medicine, Department of Plastic, Reconstructive and Aesthetic Surgery
| | - Hilmi Uysal
- Faculty of Medicine, Department of Neurology, Akdeniz University, Antalya, Turkey
| | - Ömer Özkan
- Faculty of Medicine, Department of Plastic, Reconstructive and Aesthetic Surgery
| |
Collapse
|
7
|
Rajan S, Abraham A, Suresh S, Kumar N. Anesthetic management of bilateral upper extremity allotransplantation. INDIAN JOURNAL OF TRANSPLANTATION 2021. [DOI: 10.4103/ijot.ijot_112_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
8
|
Autogenous Arteriovenous Bundle Implantation Maintains Viability Without Increased Immune Response in Large Porcine Bone Allotransplants. Transplant Proc 2020; 53:417-426. [PMID: 32958221 DOI: 10.1016/j.transproceed.2020.07.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 07/11/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Transplantation of living allogeneic bone segments may permit reconstruction of large defects, particularly if viability is maintained without immunosuppression. Development of a new autogenous osseous blood supply accomplishes this goal in rodent experimental models. This study evaluates potential systemic and local inflammatory responses to this angiogenesis in a large-animal model. METHODS Vascularized allogeneic tibia segments were transplanted orthotopically into matched tibial defects in Yucatan minipigs. Microvascular anastomoses of bone nutrient artery and vein were supplemented by intramedullary placement of an autogenous arteriovenous (AV) bundle in group 1. Group 2 served as a no-angiogenesis control. A 3-drug immunosuppression regimen was withdrawn after 2 weeks. During the 20-week survival period, periodic leukocyte counts and inflammatory cytokine levels were measured. Thereafter, osteocyte survival was quantified and transplant rejection graded by histologic examination and quantitative real-time polymerase chain reaction of immunologic markers. RESULTS Both groups developed an initial systemic response, which resolved after 4 to 6 weeks. No differences were seen in blood cytokine levels. Interleukin 2 expression was diminished in group 1 tibiae. As expected, nutrient pedicles had thrombosed without sustained immunosuppression, occluded by intimal hyperplasia. In group 1, angiogenesis from the autogenous AV bundle resulted in significantly less osteonecrosis (P = .04) and fibrosis (P = .02) than group 2 allotransplants. CONCLUSIONS Systemic immune responses to large-bone allotransplants were not increased by generation of an autogenous osseous blood supply within porcine tibial bone allotransplants. Implanted AV bundles diminished inflammation and fibrosis and improved bone viability when compared to no-angiogenesis controls.
Collapse
|
9
|
Krishnan J, Chung KC. Access to Hand Therapy Following Surgery in the United States: Barriers and Facilitators. Hand Clin 2020; 36:205-213. [PMID: 32307051 DOI: 10.1016/j.hcl.2020.01.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Hand therapy is a time-sensitive and essential postoperative service for patients undergoing reparative or corrective procedures in the hand and plays an important role in achieving best functional outcomes. In the United States, therapy is an independent service from a payer's standpoint. Access is affected by global and distinct factors in health care. This article presents views on certain aspects of health care that aide in and those that impede access to hand therapy for patients in the United States, and concludes with a brief glimpse into some ongoing efforts to improve access for patients.
Collapse
Affiliation(s)
- Jasmine Krishnan
- Michigan Medicine, Rehabilitation Services, Domino's Farms, Lobby A, Plastic Surgery Suite, Room 1108, 24 Frank Lloyd Wright Drive, SPC 5735, Ann Arbor, MI 48106, USA.
| | - Kevin C Chung
- Michigan Medicine, Section of Plastic Surgery, University of Michigan Medical School, 1500 East Medical Center Drive, 2130 Taubman Center, SPC 5340, Ann Arbor, MI 48109-5340, USA
| |
Collapse
|
10
|
Mendenhall SD, Brown S, Ben-Amotz O, Neumeister MW, Levin LS. Building a Hand and Upper Extremity Transplantation Program: Lessons Learned From the First 20 Years of Vascularized Composite Allotransplantation. Hand (N Y) 2020; 15:224-233. [PMID: 30060684 PMCID: PMC7076606 DOI: 10.1177/1558944718790579] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background: Upper extremity transplantation is a quality-of-life enhancing treatment for select patients with upper extremity loss. This article reviews the preoperative, intraoperative, and postoperative challenges in the upper extremity transplantation process and the lessons learned from the first 2 decades of hand transplantation. Methods: Key components of the author's hand transplantation protocol including patient selection, donor screening, surgical rehearsal, donor procurement, transplantation, immunosuppression, and patient outcome reporting/follow-up are reported to assist other teams who wish to establish a hand transplantation program. Results: There have been many advancements in the first 20 years of hand transplantation including better patient selection criteria, the recent addition of pediatric patients, improved surgical techniques such as the use of virtual surgical planning, and improved immunosuppression protocols. Improvement has also taken place in the tracking and reporting of hand transplant outcomes, but more work is clearly needed to fully define the benefits of transplantation, especially for pediatric patients. Conclusions: Over the past 20 years, significant progress has been made in upper extremity transplantation although a number of challenges remain including how to best document and share outcome measures, optimize immunosuppression, and diagnose/treat rejection. The authors encourage upper extremity transplant programs to report their experience and protocols to advance hand transplantation as standard of care for properly selected individuals.
Collapse
Affiliation(s)
- Shaun D. Mendenhall
- University of Utah School of Medicine, Salt Lake City, USA,Shaun D. Mendenhall, Division of Plastic and Reconstructive Surgery, Department of Surgery, University of Utah School of Medicine, 30 N 1900 E, 3B400, Salt Lake City, UT 84132, USA.
| | | | - Oded Ben-Amotz
- University of Pennsylvania, Perelman School of Medicine, Philadelphia, USA
| | | | - L. Scott Levin
- University of Pennsylvania, Perelman School of Medicine, Philadelphia, USA
| |
Collapse
|
11
|
Wang AYL, Loh CYY, Shen HH, Hsieh SY, Wang IK, Chuang SH, Wei FC. Topical Application of Human Wharton's Jelly Mesenchymal Stem Cells Accelerates Mouse Sciatic Nerve Recovery and is Associated with Upregulated Neurotrophic Factor Expression. Cell Transplant 2019; 28:1560-1572. [PMID: 31565957 PMCID: PMC6923547 DOI: 10.1177/0963689719880543] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Peripheral nerve regeneration following injury is often slow and impaired, which results in weakened and denervated muscle with subsequent atrophy. Human Wharton's jelly mesenchymal stem cells (hWJ-MSC) have potential regenerative properties which, however, remain unknown in mouse nerve recovery. This study investigated the effect of the topical application of hWJ-MSC onto repairing transected sciatic nerves in a mouse model. Human adipocyte-derived stem cells (hADSC) were used as a positive control. The sciatic nerve of BALB/c mice was transected at a fixed point and repaired under the microscope using 10-0 sutures. hWJ-MSC and hADSC were applied to the site of repair and mice were followed up for 1 year. The hWJ-MSC group had significantly better functional recovery of five-toe spread and gait angles compared with the negative control and hADSC groups. hWJ-MSC improved sciatic nerve regeneration in a dose-dependent fashion. The hWJ-MSC group had a better quality of regenerated nerve with an increased number of myelinated axons throughout. hWJ-MSC appear to be safe in mice after 1 year of follow-up. hWJ-MSC also expressed higher levels of neurotrophic factor-3, brain-derived neurotrophic factor, and glial-derived neurotrophic factor than hADSC. hWJ-MSC may promote better nerve recovery than hADSC because of this upregulation of neurotrophic factors.
Collapse
Affiliation(s)
- Aline Yen Ling Wang
- Center for Vascularized Composite Allotransplantation, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | | | - Hsin-Hsin Shen
- Biomedical Technology and Device Research Laboratories, Industrial Technology Research Institute, Hsinchu, Taiwan
| | - Sing-Ying Hsieh
- Biomedical Technology and Device Research Laboratories, Industrial Technology Research Institute, Hsinchu, Taiwan
| | - Ing-Kae Wang
- Biomedical Technology and Device Research Laboratories, Industrial Technology Research Institute, Hsinchu, Taiwan
| | - Sheng-Hao Chuang
- Center for Vascularized Composite Allotransplantation, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Fu-Chan Wei
- Center for Vascularized Composite Allotransplantation, Chang Gung Memorial Hospital, Taoyuan, Taiwan.,Department of Plastic Surgery, Chang Gung Memorial Hospital, Taoyuan, Taiwan.,College of Medicine, Chang Gung University, Taoyuan, Taiwan
| |
Collapse
|
12
|
Park SH, Eun SC, Kwon ST. Hand Transplantation: Current Status and Immunologic Obstacles. EXP CLIN TRANSPLANT 2019; 17:97-104. [PMID: 30719955 DOI: 10.6002/ect.2018.0163] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Hand transplantation is the most common form of modern composite tissue allotransplantation, with 89 cases reported worldwide since 1998. The procedure is a treatment option for complex injuries that leave patients with structural, functional, and aesthetic deficits that cannot be addressed by other means. Successful application of this technology requires a multidisciplinary approach, incorporating not only skilled hand surgeons, transplant surgeons, and transplant immunologists, but also hand therapists, psychiatrists, medical specialists, anesthesiologists, and so on. Its long-term results depend on proper patient selection, a technically successful operation, postoperative rehabilitation, and an immunotherapy protocol that prevents rejection. Recent advances in transplant immunology are shifting the focus from immunosuppression to immunoregulation. Despite the enormous antigen load associated with composite tissue allografts, hand transplant has become a clinical reality, with immunosuppression comparable to that of solid-organ transplants. Our understanding of hand transplantation is still evolving, and ongoing research is needed to improve functional outcomes and to decrease the morbidity associated with long-term immunosuppression. This review discusses the current protocols for upper extremity donation, transplant receipt, surgical techniques, postoperative rehabilitation and immunosuppression, nerve regeneration, functional outcomes, ethical issues, and financial considerations.
Collapse
Affiliation(s)
- Seong Hyuk Park
- From the Department of Plastic and Reconstructive Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Korea
| | | | | |
Collapse
|
13
|
Prosthetic Rehabilitation and Vascularized Composite Allotransplantation following Upper Limb Loss. Plast Reconstr Surg 2019; 143:1688-1701. [PMID: 31136485 DOI: 10.1097/prs.0000000000005638] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
BACKGROUND Upper limb loss is a devastating condition with dramatic physical, psychological, financial, and social consequences. Improvements in the fields of prosthetics and vascularized composite allotransplantation have opened exciting new frontiers for treatment and rehabilitation following upper limb loss. Each modality offers a unique set of advantages and limitations with regard to the restoration of hand function following amputation. METHODS Presented in this article is a discussion outlining the complex considerations and decisions encountered when determining patient appropriateness for either prosthetic rehabilitation or vascularized composite allotransplantation following upper limb loss. In this review, the authors examine how psychosocial factors, nature of injury, rehabilitation course, functional outcomes, and risks and benefits may affect overall patient selection for either rehabilitative approach. RESULTS This review summarizes the current state of the literature. Advancements in both prosthetic and biological strategies demonstrate promise with regard to facilitating rehabilitation following upper limb loss. However, there remains a dearth of research directly comparing outcomes in prosthetic rehabilitation to that following upper extremity transplantation. CONCLUSIONS Few studies have performed a direct comparison between patients undergoing vascularized composite allotransplantation and those undergoing prosthetic rehabilitation. Upper extremity transplantation and prosthetic reconstruction should not be viewed as competing options, but rather as two treatment modalities with different risk-to-benefit profiles and indications.
Collapse
|
14
|
Cooney CM, Siotos C, Aston JW, Bello RJ, Seal SM, Cooney DS, Shores JT, Brandacher G, Lee WPA. The Ethics of Hand Transplantation: A Systematic Review. J Hand Surg Am 2018; 43:84.e1-84.e15. [PMID: 28985978 DOI: 10.1016/j.jhsa.2017.08.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 07/21/2017] [Accepted: 08/02/2017] [Indexed: 02/02/2023]
Abstract
PURPOSE We conducted a systematic review to document ethical concerns regarding human upper extremity (UE) allotransplantation and how these concerns have changed over time. METHODS We performed a systematic review of 5 databases to find manuscripts addressing ethical concerns related to UE allotransplantation. Inclusion criteria were papers that were on the topic of UE allotransplantation, and related ethical concerns, written in English. We extracted and categorized ethical themes under the 4 principles of bioethics: Autonomy, Beneficence, Nonmaleficence, and Justice. We assessed theme frequency by publication year using Joinpoint regression, analyzing temporal trends, and estimating annual percent change. RESULTS We identified 474 citations; 49 articles were included in the final analysis. Publication years were 1998 to 2015 (mean, 3 publications/y; range, 0-7 publications/y). Nonmaleficence was most often addressed (46 of 49 papers; 94%) followed by autonomy (36 of 49; 74%), beneficence (35 of 49; 71%), and justice (31 of 49; 63%). Of the 14 most common themes, only "Need for More Research/Data" (nonmaleficence) demonstrated a significant increase from 1998 to 2002. CONCLUSIONS Upper extremity transplantation is an appealing reconstructive option for patients and physicians. Its life-enhancing (vs life-saving) nature and requirement for long-term immunosuppression have generated much ethical debate. Availability of human data has influenced ethical concerns over time. Our results indicate that discussion of ethical issues in the literature increased following publication of UE transplants and outcomes as well as after meetings of national societies and policy decisions by regulatory agencies. CLINICAL RELEVANCE Because UE transplantation is not a life-saving procedure, much ethical debate has accompanied its evolution. It is important for UE surgeons considering referring patients for evaluation to be aware of this discussion to fully educate patients and help them make informed treatment decisions.
Collapse
Affiliation(s)
- Carisa M Cooney
- Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, MD.
| | - Charalampos Siotos
- Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Jeffrey W Aston
- Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Ricardo J Bello
- Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Stella M Seal
- Welch Medical Library, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Damon S Cooney
- Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Jaimie T Shores
- Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Gerald Brandacher
- Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
| | - W P Andrew Lee
- Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
| |
Collapse
|
15
|
Ischemia/reperfusion injury in vascularized tissue allotransplantation: tissue damage and clinical relevance. Curr Opin Organ Transplant 2017; 21:503-9. [PMID: 27495915 DOI: 10.1097/mot.0000000000000343] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
PURPOSE OF REVIEW Ischemia and reperfusion injury (IRI) in vascularized tissue allotransplantation (VCA) remain largely undefined. Because VCA is comprised of different tissues, the sensitivity towards IRI may not be uniform. We, herein, attempt to address mechanistic aspects of IRI in VCA and provide a summary on potential technologies and targets for amelioration or treatment of IRI in this novel field. RECENT FINDINGS IRI results in a loosened architecture of musculature, hypertrophic, centrally located cell nuclei as well as a high degree of neovascularization. Mitochondria in muscle tissue show a high degree of degeneration after prolonged ischemia whereas the ultrastructure remains normal after short cold ischemia time (CIT). Muscle cell necrosis accompanied by a diffuse inflammatory infiltrate and vasculopathy of small vessels is observed after 30 h of CIT. Nerves revealed a high degree of separation and vacuolization of myelin lamellae because of Wallerian degeneration. Approaches to minimize IRI include use of novel preservation solutions, administration of antioxidative and anti-inflammatory molecules/drugs as well as the implementation of machine perfusion in the setting of VCA. SUMMARY Hand and face transplantations are logistically challenging procedures. Optimal planning and a highly congruent and motivated team are key to keep ischemia times to a minimum. In addition to pharmacological approaches, machine perfusion seems promising to help circumvent logistic problems and expand the donor pool in VCA.
Collapse
|
16
|
Kotsougiani D, Hundepool CA, Bulstra LF, Friedrich PF, Shin AY, Bishop AT. Recipient-derived angiogenesis with short term immunosuppression increases bone remodeling in bone vascularized composite allotransplantation: A pilot study in a swine tibial defect model. J Orthop Res 2017; 35:1242-1249. [PMID: 27471833 DOI: 10.1002/jor.23378] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 07/26/2016] [Indexed: 02/04/2023]
Abstract
Current vascularized composite allotransplantation (VCA) transplantation protocols rely upon life-long immune modulation to maintain tissue perfusion. Alternatively, bone-only VCA viability may be maintained in small animal models using surgical angiogenesis from implanted autogenous vessels to develop a neoangiogenic bone circulation that will not be rejected. This study tests the method's efficacy in a large animal model as a bridge to clinical practice, quantifying the remodeling and mechanical properties of porcine tibial VCAs. A segmental tibial defect was reconstructed in Yucatan miniature swine by transplantation of a matched tibia segment from an immunologically mismatched donor. Microsurgical repair of nutrient vessels was performed in all pigs, with simultaneous intramedullary placement of an autogenous arteriovenous (AV) bundle in Group 2. Group 1 served as a no-angiogenesis control. All received 2 weeks of immunosuppression. After 16 weeks, micro-CT and histomorphometric analyses were used to evaluate healing and remodeling. Axial compression and nanoindentation studies evaluated bone mechanical properties. Micro-CT analysis demonstrated significantly more new bone formation and bone remodeling at the distal allotransplant/recipient junction and on the endosteal surfaces of Group 2 tibias (p = 0.03). Elastic modulus and hardness were not adversely affected by angiogenesis. The combination of 2 weeks of immunosuppression and autogenous AV-bundle implantation within a microsurgically transplanted tibial allotransplant permitted long-term allotransplant survival over the study period of 16 weeks in this large animal model. Angiogenesis increased bone formation and remodeling without adverse mechanical effects. The method may allow future composite-tissue allotransplantation of bone without the risks associated with long-term immunosuppression. © 2016 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:1242-1249, 2017.
Collapse
Affiliation(s)
- Dimitra Kotsougiani
- Microvascular Research Laboratory, Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, Minnesota.,Department of Hand-, Plastic- and Reconstructive Surgery, -Burn Center-, BG Trauma Center Ludwigshafen, Department of Plastic Surgery, University of Heidelberg, Heidelberg, Germany
| | - Caroline A Hundepool
- Microvascular Research Laboratory, Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, Minnesota.,Department of Plastic, Reconstructive and Hand Surgery, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Liselotte F Bulstra
- Microvascular Research Laboratory, Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, Minnesota.,Department of Plastic, Reconstructive and Hand Surgery, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Patricia F Friedrich
- Microvascular Research Laboratory, Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, Minnesota
| | - Alexander Y Shin
- Microvascular Research Laboratory, Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, Minnesota
| | - Allen T Bishop
- Microvascular Research Laboratory, Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, Minnesota
| |
Collapse
|
17
|
Abstract
The field of vascularized composite allotransplantation-combining advances in reconstructive surgery, transplantation, and immunology-offers great promise for patients with heretofore unsolvable problems. In the last 30 years, hand transplantation has progressed through the phases of being a research subject, a controversial clinical procedure, a more widely accepted and expanding field, and now a promising endeavor undergoing refined indications. Although many lessons have been learned, few procedures in the author's experience have been as life-transformative in restoring the body image, motor and sensory functions, activities of daily living, and personal autonomy as successful hand transplantation.
Collapse
|
18
|
Sopko NA, Tuffaha SH, Lough D, Brandacher G, Lee WPA, Bivalacqua TJ, Redett RJ, Burnett AL. Penile Allotransplantation for Complex Genitourinary Reconstruction. J Urol 2017; 198:274-280. [PMID: 28286074 DOI: 10.1016/j.juro.2016.10.134] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/03/2016] [Indexed: 01/31/2023]
Abstract
PURPOSE Reconstruction of complex functional structures is increasingly being performed with vascularized composite allotransplantation. Penile transplantation is a novel vascularized composite allotransplantation treatment option for severe penile tissue loss and disfigurement. Three allogeneic human penile transplantations have been reported. We review these cases as well as penile transplant indications, preclinical models and immunosuppression therapy. MATERIALS AND METHODS We performed a comprehensive literature review for the years 1970 to 2016 via MEDLINE®, PubMed® and Google with the key words "penis transplantation," "penile rejection," "penile replantation," "penile tissue loss" and "penis vascularized composite allotransplantation." Relevant articles, including original research, reviews and nonscientific press reports, were selected based on contents, and a review of this literature was generated. RESULTS Three human allogeneic penile transplantations have been performed to date, of which 1 was removed 14 days after transplantation. The second recipient reports natural spontaneous erections and impregnating his partner. All 3 patients were able to void spontaneously through the graft's urethra. The complexity of the transplant is determined by how proximally the penile shaft anastomosis is performed and additional pelvic tissue may be transplanted en bloc if needed. CONCLUSIONS Penile transplantation is a technically demanding procedure with significant ethical and psychosocial implications that can provide tissue and functional replacement, including urinary diversion and natural erections. It is unclear how rejection and immunosuppression may affect graft function. Better models and more preclinical research are needed to better understand and optimize penile transplantation.
Collapse
Affiliation(s)
- Nikolai A Sopko
- The James Buchannan Brady Urological Institute and Department of Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Sami H Tuffaha
- Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Denver Lough
- Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Gerald Brandacher
- Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - W P Andrew Lee
- Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Trinity J Bivalacqua
- The James Buchannan Brady Urological Institute and Department of Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Richard J Redett
- Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Arthur L Burnett
- The James Buchannan Brady Urological Institute and Department of Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland.
| |
Collapse
|
19
|
Tuffaha SH, Cooney DS, Sopko NA, Bivalacqua TJ, Lough DM, Cooney CM, Brandacher G, Lee WPA, Burnett AL, Redett RJ. Penile transplantation: an emerging option for genitourinary reconstruction. Transpl Int 2017; 30:441-450. [PMID: 28130926 DOI: 10.1111/tri.12928] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Revised: 12/05/2016] [Accepted: 01/24/2017] [Indexed: 01/10/2023]
Abstract
Penile transplantation is an emerging option for patients with severe genital defects not amenable to traditional reconstructive options. In this article, we discuss the burgeoning problem of severe male genitourinary trauma in the military, the limitations of traditional reconstructive options in addressing these problems, and the potential for penile transplantation to provide improved outcomes. We also review the preclinical research and limited worldwide experience with penile transplantation to date, including lessons learned, and discuss the many important technical, logistical, and ethical considerations pertaining to penile transplantation that must be addressed to maximize the likelihood of successful implementation.
Collapse
Affiliation(s)
- Sami H Tuffaha
- Department of Plastic and Reconstructive Surgery, The Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Damon S Cooney
- Department of Plastic and Reconstructive Surgery, The Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Nikolai A Sopko
- Department of Urology, The Johns Hopkins School of Medicine, Baltimore, MD, USA
| | | | - Denver M Lough
- Department of Plastic and Reconstructive Surgery, The Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Carisa M Cooney
- Department of Plastic and Reconstructive Surgery, The Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Gerald Brandacher
- Department of Plastic and Reconstructive Surgery, The Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Wei-Ping Andrew Lee
- Department of Plastic and Reconstructive Surgery, The Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Arthur L Burnett
- Department of Urology, The Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Richard J Redett
- Department of Plastic and Reconstructive Surgery, The Johns Hopkins School of Medicine, Baltimore, MD, USA
| |
Collapse
|
20
|
Momeni A, Chang B, Levin LS. Technology and vascularized composite allotransplantation (VCA)-lessons learned from the first bilateral pediatric hand transplant. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2016; 27:161. [PMID: 27638100 DOI: 10.1007/s10856-016-5771-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 08/24/2016] [Indexed: 06/06/2023]
Abstract
The reconstructive principle of replacing "like with like" is best met with vascularized composite allotransplantation in which the components of an existing defect are "matched" to the greatest extent possible in a single stage restoration. Hand transplantation is a labor-intensive and time-intensive process and can be conceptualized into distinct phases that include (1) patient selection and preoperative preparation, (2) technical execution of the procedure, and (3) postoperative rehabilitation and follow-up. The advent of technological innovations, such as 3D printing technology, novel implant technology, as well as innovative imaging technology, such as functional magnetic resonance imaging have the potential of favorably affecting all phases of this process, thus contributing to improved outcomes. The use of these technologies in the world's first case of bilateral hand transplantation in a pediatric patient is discussed.
Collapse
Affiliation(s)
- Arash Momeni
- Division of Plastic and Reconstructive Surgery, Stanford University, 770 Welch Road, Suite 400, Palo Alto, CA, USA.
- Division of Plastic Surgery, University of Pennsylvania, Philadelphia, PA, USA.
| | - Benjamin Chang
- Division of Plastic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - L Scott Levin
- Division of Plastic Surgery, University of Pennsylvania, Philadelphia, PA, USA
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| |
Collapse
|
21
|
|
22
|
Kumnig M, Jowsey-Gregoire SG. Key psychosocial challenges in vascularized composite allotransplantation. World J Transplant 2016; 6:91-102. [PMID: 27011907 PMCID: PMC4801807 DOI: 10.5500/wjt.v6.i1.91] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 12/16/2015] [Accepted: 01/08/2016] [Indexed: 02/05/2023] Open
Abstract
Psychosocial factors are important elements in the assessment and follow-up care for vascularized composite allotransplantation (VCA) and require multidisciplinary evaluation protocols. This review will highlight differences between VCA with solid organ transplantation (SOT), provide information on the psychosocial selection of VCA candidates, ethical issues, psychological outcomes, and on the need for multicenter research. VCA is primarily a life-enhancing procedure to improve recipients' quality of life and psychological well-being and it represents a potential option to provide reproduction in case of penile or uterine transplantation. The risk benefit ratio is distinctly different than SOT with candidates desiring life enhancing outcomes including improved body image, return to occupations, restored touch, and for uterine transplant, pregnancy. The Chauvet Workgroup has been convened with membership from a number of transplant centers to address these issues and to call for multicenter research. A multicenter research network would share similar evaluation approaches so that meaningful research on psychosocial variables could inform the transplant community and patients about factors that increase risk of non-adherence and other adverse psychosocial and medical outcomes.
Collapse
|
23
|
Fifty Years of Innovation in Plastic Surgery. Arch Plast Surg 2016; 43:145-52. [PMID: 27019807 PMCID: PMC4807169 DOI: 10.5999/aps.2016.43.2.145] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 01/20/2016] [Accepted: 01/27/2016] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND Innovation has molded the current landscape of plastic surgery. However, documentation of this process only exists scattered throughout the literature as individual articles. The few attempts made to profile innovation in plastic surgery have been narrative, and therefore qualitative and inherently biased. Through the implementation of a novel innovation metric, this work aims to identify and characterise the most prevalent innovations in plastic surgery over the last 50 years. METHODS Patents and publications related to plastic surgery (1960 to 2010) were retrieved from patent and MEDLINE databases, respectively. The most active patent codes were identified and grouped into technology areas, which were subsequently plotted graphically against publication data. Expert-derived technologies outside of the top performing patents areas were additionally explored. RESULTS Between 1960 and 2010, 4,651 patents and 43,118 publications related to plastic surgery were identified. The most active patent codes were grouped under reconstructive prostheses, implants, instruments, non-invasive techniques, and tissue engineering. Of these areas and other expert-derived technologies, those currently undergoing growth include surgical instruments, implants, non-invasive practices, transplantation and breast surgery. Innovations related to microvascular surgery, liposuction, tissue engineering, lasers and prostheses have all plateaued. CONCLUSIONS The application of a novel metric for evaluating innovation quantitatively outlines the natural history of technologies fundamental to the evolution of plastic surgery. Analysis of current innovation trends provides some insight into which technology domains are the most active.
Collapse
|
24
|
A Statistical Comparative Assessment of Face and Hand Transplantation Outcomes to Determine Whether Either Meets the Standard of Care Threshold. Plast Reconstr Surg 2016; 137:214e-222e. [DOI: 10.1097/prs.0000000000001893] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
|
25
|
|
26
|
Cavadas PC, Thione A, Blanes M, Mayordomo-Aranda E. Primary Central Nervous System Posttransplant Lymphoproliferative Disease in a Bilateral Transfemoral Lower Extremity Transplantation Recipient. Am J Transplant 2015; 15:2758-61. [PMID: 25968917 DOI: 10.1111/ajt.13313] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2015] [Revised: 03/08/2015] [Accepted: 03/13/2015] [Indexed: 01/25/2023]
Abstract
Posttransplant lymphoproliferative disorder (PTLD) is a heterogeneous group of clinical and pathological entities characterized by malignant lymphoid cell proliferation occurring after solid organ transplantation, with frequent extranodal involvement. Central nervous system (CNS) involvement occurs in 7-15% of the cases and it is a significant negative prognostic factor. A case of primary CNS (PCNS) PTLD in the first bilateral lower limb transplant recipient is presented.
Collapse
Affiliation(s)
- P C Cavadas
- Reconstructive Surgery Unit, Clinica Cavadas, Valencia, Spain
| | - A Thione
- Reconstructive Surgery Unit, Clinica Cavadas, Valencia, Spain
| | - M Blanes
- Infectious Disease Unit, Hospital La Fe, Valencia, Spain
| | | |
Collapse
|
27
|
Jank BJ, Xiong L, Moser PT, Guyette JP, Ren X, Cetrulo CL, Leonard DA, Fernandez L, Fagan SP, Ott HC. Engineered composite tissue as a bioartificial limb graft. Biomaterials 2015; 61:246-56. [PMID: 26004237 DOI: 10.1016/j.biomaterials.2015.04.051] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 04/22/2015] [Accepted: 04/30/2015] [Indexed: 12/18/2022]
Abstract
The loss of an extremity is a disastrous injury with tremendous impact on a patient's life. Current mechanical prostheses are technically highly sophisticated, but only partially replace physiologic function and aesthetic appearance. As a biologic alternative, approximately 70 patients have undergone allogeneic hand transplantation to date worldwide. While outcomes are favorable, risks and side effects of transplantation and long-term immunosuppression pose a significant ethical dilemma. An autologous, bio-artificial graft based on native extracellular matrix and patient derived cells could be produced on demand and would not require immunosuppression after transplantation. To create such a graft, we decellularized rat and primate forearms by detergent perfusion and yielded acellular scaffolds with preserved composite architecture. We then repopulated muscle and vasculature with cells of appropriate phenotypes, and matured the composite tissue in a perfusion bioreactor under electrical stimulation in vitro. After confirmation of composite tissue formation, we transplanted the resulting bio-composite grafts to confirm perfusion in vivo.
Collapse
Affiliation(s)
- Bernhard J Jank
- Center for Regenerative Medicine, Massachusetts General Hospital, USA; Harvard Medical School, Boston, MA, USA
| | - Linjie Xiong
- Center for Regenerative Medicine, Massachusetts General Hospital, USA
| | - Philipp T Moser
- Center for Regenerative Medicine, Massachusetts General Hospital, USA; Harvard Medical School, Boston, MA, USA
| | - Jacques P Guyette
- Center for Regenerative Medicine, Massachusetts General Hospital, USA; Harvard Medical School, Boston, MA, USA
| | - Xi Ren
- Center for Regenerative Medicine, Massachusetts General Hospital, USA; Harvard Medical School, Boston, MA, USA
| | - Curtis L Cetrulo
- Harvard Medical School, Boston, MA, USA; Transplantation Biology Research Center, Department of Surgery, Massachusetts General Hospital, USA
| | - David A Leonard
- Harvard Medical School, Boston, MA, USA; Transplantation Biology Research Center, Department of Surgery, Massachusetts General Hospital, USA
| | | | - Shawn P Fagan
- Massachusetts General Hospital, Division of Burn Surgery, Harvard Medical School, USA
| | - Harald C Ott
- Division of Thoracic Surgery, Department of Surgery, Massachusetts General Hospital, USA; Harvard Medical School, Boston, MA, USA.
| |
Collapse
|
28
|
Sears ED, Chung KC. Commentary on "The utility of hand transplantation in hand amputee patients". J Hand Surg Am 2015; 40:15. [PMID: 25534833 DOI: 10.1016/j.jhsa.2014.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Revised: 10/07/2014] [Accepted: 10/07/2014] [Indexed: 02/02/2023]
Affiliation(s)
- Erika D Sears
- The Section of Plastic Surgery, Department of Surgery, The University of Michigan Health System, Ann Arbor, MI
| | - Kevin C Chung
- The Section of Plastic Surgery, Department of Surgery, The University of Michigan Health System, Ann Arbor, MI
| |
Collapse
|
29
|
Changing attitudes toward hand allotransplantation among North American hand surgeons. Ann Plast Surg 2014; 72 Suppl 1:S56-60. [PMID: 24740026 DOI: 10.1097/sap.0000000000000147] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
OBJECTIVES Although more than 70 hand transplants have been performed worldwide, the appropriate clinical indications for this operation are still being determined. Cost and patient exposure to the challenges of lifelong immunosuppression for what is a quality of life-improving (but not life-saving) operation are the focus of the ongoing discussion. A study performed in 2007 showed that surgeons' opinions on the issue varied widely. Recently, more information has been made available regarding long-term patient outcomes, and significant improvements in immunotherapy protocols have been reported. In light of this, we sought to examine changing attitudes regarding hand allotransplantation and its indications by surveying hand surgeons. METHODS An email-based survey was sent to members of the American Society for Surgery of the Hand. Demographic information and practice profiles were identified, followed by their risk assessment of hand allotransplants and endorsement of performing the operation in different clinical scenarios. Additional questions focused on the appropriate indications for hand allotransplantation, as well as the procedure's associated ethical and financial implications. RESULTS A total of 385 surgeons responded to the survey (14% response rate). The majority (82%) considered hand transplantation to be a high-risk operation (as opposed to 27% in hand replantation), with 78% citing lifelong immunosuppression as the primary factor impacting their overall risk assessment. The most commonly accepted indication for hand vascularized composite allotransplantation was loss of bilateral hands (80% in favor). Dominant hand loss (with an intact contralateral hand) was a far less frequently accepted indication (36% in favor). Patient adherence to immunosuppressive regimens (51%) and expectations of functional/aesthetic outcome (38%) were the most frequently chosen top psychosocial issues that must be addressed by the surgical/medical teams involved in the operation. CONCLUSIONS Our study's results demonstrate increasing overall support for hand allotransplantation and increasing acceptance of today's immunosuppressive regimens compared to prior literature. Bilateral hand loss remains the primary agreed-upon indication for transplantation. Despite increasing acceptance in the surgical community, the dangers of chronic immunosuppression, cost and patient adherence continue to be the primary concerns hindering its broader acceptance.
Collapse
|
30
|
Ramirez AE, Cheng HY, Lao WW, Wang YL, Wen CJ, Wallace CG, Lin CF, Shih LY, Chuang SH, Wei FC. A novel rat full-thickness hemi-abdominal wall/hindlimb osteomyocutaneous combined flap: influence of allograft mass and vascularized bone marrow content on vascularized composite allograft survival. Transpl Int 2014; 27:977-86. [DOI: 10.1111/tri.12364] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Revised: 11/10/2013] [Accepted: 05/19/2014] [Indexed: 11/26/2022]
Affiliation(s)
- Alejandro E. Ramirez
- Department of Plastic and Reconstructive Surgery; Chang Gung Memorial Hospital at Linkou; Taoyuan Taiwan
- Pontifical Catholic University of Chile; Santiago Chile
| | - Hui-Yun Cheng
- Center for Vascularized Composite Allotransplantation; Chang Gung Memorial Hospital at Linkou; Taoyuan Taiwan
| | - William W. Lao
- Department of Plastic and Reconstructive Surgery; Chang Gung Memorial Hospital at Linkou; Taoyuan Taiwan
- Medical College of Wisconsin; Milwaukee WI USA
| | - Yen-Ling Wang
- Center for Vascularized Composite Allotransplantation; Chang Gung Memorial Hospital at Linkou; Taoyuan Taiwan
| | - Chih-Jen Wen
- School of Medicine; Chang Gung University; Taoyuan Taiwan
| | - Christopher G. Wallace
- Department of Plastic and Reconstructive Surgery; Chang Gung Memorial Hospital at Linkou; Taoyuan Taiwan
| | - Chih-Fan Lin
- Center for Vascularized Composite Allotransplantation; Chang Gung Memorial Hospital at Linkou; Taoyuan Taiwan
| | - Ling-Yi Shih
- Department of Plastic and Reconstructive Surgery; Chang Gung Memorial Hospital at Linkou; Taoyuan Taiwan
| | - Sheng-Hao Chuang
- Department of Plastic and Reconstructive Surgery; Chang Gung Memorial Hospital at Linkou; Taoyuan Taiwan
| | - Fu-Chan Wei
- Department of Plastic and Reconstructive Surgery; Chang Gung Memorial Hospital at Linkou; Taoyuan Taiwan
- Center for Vascularized Composite Allotransplantation; Chang Gung Memorial Hospital at Linkou; Taoyuan Taiwan
- School of Medicine; Chang Gung University; Taoyuan Taiwan
| |
Collapse
|
31
|
Using the Dorsal, Cavernosal, and External Pudendal Arteries for Penile Transplantation. Plast Reconstr Surg 2014; 134:111e-119e. [DOI: 10.1097/prs.0000000000000277] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
32
|
The effects of immunosuppressive medications on outcomes in microvascular free tissue transfer. Plast Reconstr Surg 2014; 133:552e-558e. [PMID: 24675207 DOI: 10.1097/prs.0000000000000012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Reported 10-year patient survival after liver transplantation is nearing 70 percent, with similar trends seen for kidney transplantation. With increasing life expectancy, these patients have an increased need for posttransplant reconstructive surgery. Thus, plastic surgeons must know the effects of immunosuppressive medications on outcomes in microvascular reconstruction. METHODS A retrospective review was performed on all immunosuppressed solid-organ transplant patients who underwent subsequent free tissue transfer of all types, over an 8-year period. Patient demographics, type of solid organ transplant, immunosuppressive regimen, anticoagulation regimen, associated medical comorbidities, and complication rates were analyzed. RESULTS Twenty-four microvascular free tissue transfers were performed over an 8-year period on immunosuppressed patients, for head and neck and lower extremity reconstruction. Fifteen patients (63 percent) underwent prior kidney transplant, seven (29 percent) underwent prior liver transplant, and two (8 percent) underwent prior lung transplant. Prednisone (79 percent of patients), cyclosporine (33 percent), and tacrolimus (33 percent) were the most commonly used immunosuppressive medications. Complications included one total flap loss (4 percent), three intraoperative arterial thromboses (13 percent), and two postoperative venous thromboses (8 percent). Univariate analysis illustrated a statistically significant association between prednisone and overall complication rate (p = 0.032). CONCLUSIONS Microvascular free tissue transfer is a challenge in immunosuppressed patients. Univariate analysis showed prednisone to correlate statistically with operative morbidity. Transplant patients receiving prednisone at the time of their elective free flap procedure will require additional care to lower the additional risk of delayed wound healing, partial flap loss, and anastomotic thrombosis. CLINICAL QUESTION/LEVEL OF EVIDENCE Therapeutic IV.
Collapse
|
33
|
Abstract
PURPOSE OF REVIEW Psychosocial aspects are important indicators for reconstructive hand transplantation (RHT). They warrant further research attention given the influence of psychosocial factors on the success of RHT. This review will contrast RHT with solid organ transplantation, provide information to guide selection of RHT candidates and ethical implications, share information on psychological outcomes, and address the importance of a multicenter research approach. RECENT FINDINGS Previously published RHT reports have tried to identify psychosocial factors that are essential to guide selection of RHT candidates and that predict psychosocial outcomes. These issues in RHT are receiving increased attention, but standardized psychosocial evaluation and follow-up protocols are still needed. Recent study highlights the potential for a multicenter research approach that uses standardized assessment strategies and also emphasizes the need for a shared assessment approach to understand psychosocial outcomes. SUMMARY RHT combines the technical rigors of hand surgery and microsurgery with the complex multidisciplinary care that defines modern transplantation medicine. As recent work has provided a more complete picture of the complexities of the psychosocial factors in RHT, a psychosocial assessment protocol developed with input across the centers currently performing this procedure would capitalize on the collective diverse clinical experiences and standardize the assessment and follow-up protocol. With such standardized procedures in place, psychosocial risk factors for both poor psychosocial and medical/surgical outcomes can be identified which can inform the selection or preparation of future candidates.
Collapse
|
34
|
The role of imaging in patient selection, preoperative planning, and postoperative monitoring in human upper extremity allotransplantation. J Transplant 2014; 2014:169546. [PMID: 24800056 PMCID: PMC3985332 DOI: 10.1155/2014/169546] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Revised: 02/16/2014] [Accepted: 02/25/2014] [Indexed: 11/17/2022] Open
Abstract
Objective. To describe the role of imaging in vascular composite allotransplantation based on one institution's experience with upper extremity allotransplant patients. Methods. The institutional review board approved this review of HIPAA-compliant patient data without the need for individual consent. A retrospective review was performed of imaging from 2008 to 2011 on individuals undergoing upper extremity transplantation. This demonstrated that, of the 19 patients initially considered, 5 patients with a mean age of 37 underwent transplantation. Reports were correlated clinically to delineate which preoperative factors lead to patient selection versus disqualification and what concerns dictated postoperative imaging. Findings were subdivided into musculoskeletal and vascular imaging criterion. Results. Within the screening phase, musculoskeletal exclusion criterion included severe shoulder arthropathy, poor native bone integrity, and marked muscular atrophy. Vascular exclusion criterion included loss of sufficient arterial or venous supply and significant distortion of the native vascular architecture. Postoperative imaging was used to document healing and hardware integrity. Postsurgical angiography and ultrasound were used to monitor for endothelial proliferation or thrombosis as signs of rejection and vascular complication. Conclusion. Multimodality imaging is an integral component of vascular composite allotransplantation surgical planning and surveillance to maximize returning form and functionality while minimizing possible complications.
Collapse
|
35
|
Elliott RM, Tintle SM, Levin LS. Upper extremity transplantation: current concepts and challenges in an emerging field. Curr Rev Musculoskelet Med 2014; 7:83-8. [PMID: 24241894 PMCID: PMC4094126 DOI: 10.1007/s12178-013-9191-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Loss of an isolated upper limb is an emotionally and physically devastating event that results in significant impairment. Patients who lose both upper extremities experience profound disability that affects nearly every aspect of their lives. While prosthetics and surgery can eventually provide the single limb amputee with a suitable assisting hand, limited utility, minimal haptic feedback, weight, and discomfort are persistent problems with these techniques that contribute to high rates of prosthetic rejection. Moreover, despite ongoing advances in prosthetic technology, bilateral amputees continue to experience high levels of dependency, disability, and distress. Hand and upper extremity transplantation holds several advantages over prosthetic rehabilitation. The missing limb is replaced with one of similar skin color and size. Sensibility, voluntary motor control, and proprioception are restored to a greater degree, and afford better dexterity and function than prosthetics. The main shortcomings of transplantation include the hazards of immunosuppression, the complications of rejection and its treatment, and high cost. Hand and upper limb transplantation represents the most commonly performed surgery in the growing field of Vascularized Composite Allotransplantation (VCA). As upper limb transplantation and VCA have become more widespread, several important challenges and controversies have emerged. These include: refining indications for transplantation, optimizing immunosuppression, establishing reliable criteria for monitoring, diagnosing, and treating rejection, and standardizing outcome measures. This article will summarize the historical background of hand transplantation and review the current literature and concepts surrounding it.
Collapse
Affiliation(s)
- River M. Elliott
- />The Curtis National Hand Center, 3333 North Calvert Street, Baltimore, MD 21209 USA
| | - Scott M. Tintle
- />Department of Orthopaedic Surgery, Walter Reed National Military Medical Center, America Building, 19 2nd Floor, Bethesda, MD 20889-5600 USA
| | - L. Scott Levin
- />Department of Orthopaedic Surgery, Hospital of the University of Pennsylvania, 2 Silverstein, 3400 Spruce Street, Philadelphia, PA 19104 USA
| |
Collapse
|
36
|
Caterson EJ, Lopez J, Medina M, Pomahac B, Tullius SG. Ischemia-reperfusion injury in vascularized composite allotransplantation. J Craniofac Surg 2014; 24:51-6. [PMID: 23321872 DOI: 10.1097/scs.0b013e31827104e1] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Vascularized composite allotransplantation may now be considered a viable treatment option in patients with complex craniofacial and limb defects. However, the field is still in its infancy, and challenges continue to exist. These challenges, most notably the adverse effects of lifelong immunosuppression, must be weighed against the benefits of the procedure. Improvements in this risk-benefit ratio can be achieved by achieving tolerance and preventing rejection. Five decades after Dr. Joseph E. Murray introduced the field of transplantation to the world, we now have a better understanding of the immunologic factors that may contribute to rejection and inhibit tolerance. In this article, we review emerging evidence that suggests that "danger signals" associated with ischemia-reperfusion injury contribute to innate immune activation, promoting rejection, and inhibiting tolerance. Based on this understanding, we also describe several strategies that may ameliorate the damaging effects of ischemia-reperfusion and the clinical implications of ischemia-reperfusion on the vascularized composite tissue allotransplantation outcome.
Collapse
Affiliation(s)
- Edward J Caterson
- Divisions of Plastic Surgery and Transplant Surgery, Brigham and Women's Hospital, Boston, MA 02115, USA.
| | | | | | | | | |
Collapse
|
37
|
|
38
|
Syngeneic adipose-derived stem cells with short-term immunosuppression induce vascularized composite allotransplantation tolerance in rats. Cytotherapy 2013; 16:369-80. [PMID: 24119648 DOI: 10.1016/j.jcyt.2013.06.020] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 06/23/2013] [Accepted: 06/27/2013] [Indexed: 12/29/2022]
Abstract
BACKGROUND AIMS A clinically applicable tolerance induction regimen that removes the requirement for lifelong immunosuppression would benefit recipients of vascularized composite allotransplantation (VCA). We characterized the immunomodulatory properties of syngeneic (derived from the recipient strain) adipocyte-derived stem cells (ADSCs) and investigated their potential to induce VCA tolerance in rats. METHODS ADSCs were isolated from Lewis (LEW, RT1A(l)) rats; their immunomodulatory properties were evaluated by means of mixed lymphocyte reactions in vitro and VCAs in vivo across a full major histocompatibility complex mismatch with the use of Brown-Norway (BN, RT1A(n)) donor rats. Two control and four experimental groups were designed to evaluate treatment effects of ADSCs and transient immunosuppressants (anti-lymphocyte globulin, cyclosporine) with or without low-dose (200 cGy) total body irradiation. Flow cytometry was performed to quantify levels of circulating CD4(+)CD25(+)FoxP3(+) regulatory T cells (Tregs). RESULTS Cultured syngeneic ADSCs exhibited CD90.1(+)CD29(+)CD73(+)CD45(-)CD79a(-)CD11b/c(-) phenotype and the plasticity to differentiate to adipocytes and osteocytes. ADSCs dramatically suppressed proliferation of LEW splenocytes against BN antigen and mitogen, respectively, in a dose-dependent fashion, culminating in abrogation of allo- and mitogen-stimulated proliferation at the highest concentration tested. Accordingly, one infusion of syngeneic ADSCs markedly prolonged VCA survival in LEW recipients treated with transient immunosuppression; of these, 66% developed tolerance. Total body irradiation provided no additional VCA survival benefit. An important role for Tregs in tolerance induction/maintenance was suggested in vivo and in vitro. CONCLUSIONS Treatment comprising syngeneic ADSCs and transient immunosuppression (i) increased levels of circulating Tregs and (ii) induced tolerance in 66% of recipients of major histocompatibility complex-mismatched VCAs.
Collapse
|
39
|
Chao AH, Meyerson J, Povoski SP, Kocak E. A review of devices used in the monitoring of microvascular free tissue transfers. Expert Rev Med Devices 2013; 10:649-60. [PMID: 23972071 DOI: 10.1586/17434440.2013.827527] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The use of microvascular anastomoses to allow transfer of viable tissue is a fundamental technique of reconstructive surgery, and is used to treat a broad spectrum of clinical problems. The primary threat to this type of reconstructive surgery is anastomotic vascular thrombosis, which can lead to complete loss of tissue with potentially devastating consequences. Monitoring of tissue perfusion postoperatively is critical, since early recognition of vascular compromise and prompt surgical intervention is correlated with the ability for tissue salvage. Traditionally, physical examination was the primary means of monitoring, but possesses several limitations. Medical devices introduced for the purposes of flap monitoring address many of these deficiencies, and have greatly enhanced this critical aspect of the reconstructive surgery process.
Collapse
Affiliation(s)
- Albert H Chao
- Department of Plastic Surgery, The Ohio State University, Columbus, OH 43212, USA
| | | | | | | |
Collapse
|
40
|
Buretta KJ, Brat GA, Christensen JM, Ibrahim Z, Grahammer J, Furtmüller GJ, Suami H, Cooney DS, Lee WPA, Brandacher G, Sacks JM. Near-infrared lymphography as a minimally invasive modality for imaging lymphatic reconstitution in a rat orthotopic hind limb transplantation model. Transpl Int 2013; 26:928-37. [PMID: 23879384 DOI: 10.1111/tri.12150] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2013] [Revised: 04/07/2013] [Accepted: 06/23/2013] [Indexed: 01/12/2023]
Abstract
Wider application of vascularized composite allotransplantation (VCA) is limited by the need for chronic immunosuppression. Recent data suggest that the lymphatic system plays an important role in mediating rejection. This study used near-infrared (NIR) lymphography to describe lymphatic reconstitution in a rat VCA model. Syngeneic (Lewis-Lewis) and allogeneic (Brown Norway-Lewis) rat orthotopic hind limb transplants were performed without immunosuppression. Animals were imaged pre- and postoperatively using indocyanine green (ICG) lymphography. Images were collected using an NIR imaging system. Co-localization was achieved through use of an acrylic paint/hydrogen peroxide mixture. In all transplants, ICG first crossed graft suture lines on postoperative day (POD) 5. Clinical signs of rejection also appeared on POD 5 in allogeneic transplants, with most exhibiting Grade 3 rejection by POD 6. Injection of an acrylic paint/hydrogen peroxide mixture on POD 5 confirmed the existence of continuous lymphatic vessels crossing the suture line and draining into the inguinal lymph node. NIR lymphography is a minimally invasive imaging modality that can be used to study lymphatic vessels in a rat VCA model. In allogeneic transplants, lymphatic reconstitution correlated with clinical rejection. Lymphatic reconstitution may represent an early target for immunomodulation.
Collapse
Affiliation(s)
- Kate J Buretta
- Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Biological extremity reconstruction after sarcoma resection: past, present, and future. Sarcoma 2013; 2013:529349. [PMID: 23840167 PMCID: PMC3690904 DOI: 10.1155/2013/529349] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 05/18/2013] [Accepted: 05/26/2013] [Indexed: 01/23/2023] Open
Abstract
In sarcoma surgery besides a wide local resection, limb salvage became more and more important. Reconstruction of bone and soft tissue defects after sarcoma resection poses a major challenge for surgeons. Nowadays a broad range of reconstructive methods exist to deal with bony defects. Among these are prostheses, bone autografts, or bone allografts. Furthermore a variety of plastic reconstructive techniques exist that allow soft tissue reconstruction or coverage after sarcoma resection. Here we discuss the historical highlights, the present role, and possible future options for biological reconstruction.
Collapse
|
42
|
Nerve regeneration in rat limb allografts: evaluation of acute rejection rescue. Plast Reconstr Surg 2013; 131:499e-511e. [PMID: 23542267 DOI: 10.1097/prs.0b013e31828275b7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
BACKGROUND Successful nerve regeneration is critical to the functional success of composite tissue allografts. The present study was designed to characterize the effect of acute rejection on nerve regeneration and functional recovery in the setting of orthotopic limb transplantation. METHODS A rat orthotopic limb transplantation model was used to evaluate the effects of acute rejection on nerve regeneration and motor recovery. Continuous administration of FK506 (full suppression), administration of FK506 for the first 8 of 12 weeks (late rejection), or delayed administration of FK506/dexamethasone following noticeable rejection (early rejection) was used to preclude or induce rejection following limb transplantation. Twelve weeks postoperatively, nerve regeneration was assessed by means of histomorphometric analysis of explanted sciatic nerve, and motor recovery was assessed by means of evoked muscle force measurement in extensor digitorum longus muscle. RESULTS A single episode of acute rejection that occurs immediately or late after reconstruction does not significantly alter the number of regenerating axonal fibers. Acute rejection occurring late after reconstruction adversely affects extensor digitorum longus muscle function in composite tissue allografts. CONCLUSIONS Collected data reinforce that adequate immunosuppressant administration in cases of allogeneic limb transplantation ensures levels of nerve regeneration and motor functional recovery equivalent to that of syngeneic transplants. Prompt rescue following acute rejection was further demonstrated not to significantly affect nerve regeneration and functional recovery postoperatively. However, instances of acute rejection that occur late after reconstruction affect graft function. In total, the present study begins to characterize the effect of immunosuppression regimens on nerve regeneration and motor recovery in the setting of composite tissue allografts.
Collapse
|
43
|
|
44
|
Mesenchymal stem cells as immunomodulators in a vascularized composite allotransplantation. Clin Dev Immunol 2012; 2012:854846. [PMID: 23227090 PMCID: PMC3514826 DOI: 10.1155/2012/854846] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Revised: 09/22/2012] [Accepted: 09/23/2012] [Indexed: 12/29/2022]
Abstract
Vascularized composite allotransplantations (VCAs) are not routinely performed for tissue reconstruction because of the potentially harmful adverse effects associated with lifelong administration of immunosuppressive agents. Researchers have been eagerly seeking alternative methods that circumvent the long-term use of immunosuppressants. Mesenchymal stem cells (MSCs) show promise as an immunomodulatory therapeutic agent and are currently being tested in preclinical and clinical settings as therapies for autoimmune disorders or transplant rejection. The mechanisms by which MSCs modulate the immune response are still under thorough investigation, but these most likely involve expression of local factors influencing T-cell regulation, modulation of cytokine expression (e.g., IL-10, TGF-β, TNF-α, INF-γ, etc.), and interactions with dendritic or antigen presenting cells. In this paper, we summarize the current understanding of immunomodulation achieved by MSC therapies and introduce a possible outline for future clinical applications in VCA.
Collapse
|
45
|
Schmitt T, Talley J, Chang J. New Concepts and Technologies in Reconstructive Hand Surgery. Clin Plast Surg 2012; 39:445-51. [DOI: 10.1016/j.cps.2012.07.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
|
46
|
Bumbasirevic M, Stevanovic M, Lesic A, Atkinson HDE. Current management of the mangled upper extremity. INTERNATIONAL ORTHOPAEDICS 2012; 36:2189-95. [PMID: PMID: 22923227 PMCID: PMC3479293 DOI: 10.1007/s00264-012-1638-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2012] [Accepted: 07/25/2012] [Indexed: 12/16/2022]
Abstract
Mangled describes an injury caused by cutting, tearing, or crushing, which leads to the limb becoming unrecognizable; in essence, there are two treatment options for mangled upper extremities, amputation and salvage reconstruction. With advances in our understanding of human physiology and basic science, and with the development of new fixation devices, modern microsurgical techniques and the possibility of different types of bony and soft tissue reconstruction, the clinical and functional outcomes are often good, and certainly preferable to those of contemporary prosthetics. Early or even immediate (emergency) complete upper extremity reconstruction appears to give better results than delayed or late reconstruction and should be the treatment of choice where possible. Before any reconstruction is attempted, injuries to other organs must be excluded. Each step in the assessment and treatment of a mangled extremity is of utmost importance. These include radical tissue debridement, prophylactic antibiotics, copious irrigation with a lavage system, stable bone fixation, revascularization, nerve repair, and soft tissue coverage. Well-planned and early rehabilitation leads to a better functional outcome. Despite the use of scoring systems to help guide decisions and predict outcomes, the decision to reconstruct or to amputate still ultimately lies with the surgical judgment and experience of the treating surgeon.
Collapse
Affiliation(s)
- Marko Bumbasirevic
- School of Medicine, Clinic of Orthopaedic Surgery and Traumatology, Clinical Centre, University of Belgrade, Visegradska 26, 11000 Belgrade, Serbia.
| | | | | | | |
Collapse
|