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Allotransplantation

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https://www.readbyqxmd.com/read/28445377/first-lower-two-thirds-osteomyocutaneous-facial-allograft-perfused-by-a-unilateral-facial-artery-outcomes-and-vascularization-at-1-year-after-transplantation
#1
Sebastian Fischer, Thomas C Lee, Nicco Krezdorn, Muayyad Alhefzi, Maximilian Kueckelhaus, Ericka M Bueno, Bohdan Pomahac
BACKGROUND: Facial allotransplantation provides a unique opportunity to restore facial form and function in severely disfigured patients. Using a single unilateral facial artery for vascularization can significantly reduce surgical duration and thus facilitate the practice of face transplantation. METHODS: A 33-year-old man with a history of high-energy ballistic trauma received a facial allograft comprising the lower two-thirds of the face, including maxilla and mandible...
May 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28425928/porcine-circoviruses-and-xenotransplantation
#2
REVIEW
Joachim Denner, Annette Mankertz
Allotransplantation and xenotransplantation may be associated with the transmission of pathogens from the donor to the recipient. Whereas in the case of allotransplantation the transmitted microorganisms and their pathogenic effect are well characterized, the possible influence of porcine microorganisms on humans is mostly unknown. Porcine circoviruses (PCVs) are common in pig breeds and they belong to porcine microorganisms that still have not been fully addressed in terms of evaluating the potential risk of xenotransplantation using pig cells, tissues, and organs...
April 20, 2017: Viruses
https://www.readbyqxmd.com/read/28422434/rat-hindlimb-cryopreservation-and-transplantation-a-step-towards-organ-banking
#3
Amir Arav, Or Friedman, Yehudit Natan, Eyal Gur, Nir Shani
In 2016 over 5 million reconstructive procedures were performed in the USA. The recent successes of clinical vascularized composite allotransplantations (VCA), hand and face transplantations included, established the tremendous potential of these life-enhancing reconstructions. Nevertheless, Due to limited availability and lifelong immunosuppression, application is limited. Long term banking of composite transplants may increase the availability of esthetically compatible parts with partial or complete HLA matching, reducing the risk of rejection and the immunosuppressive burden...
April 19, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28371289/prolonged-cold-ischemia-time-results-in-local-and-remote-organ-dysfunction-in-a-murine-model-of-vascularized-composite-transplantation
#4
Néha Datta, Sean G Devaney, Ronald W Busuttil, Kodi Azari, Jerzy W Kupiec-Weglinski
Vascularized composite allotransplantation (VCA) is a viable reconstructive option for complex tissue defects. Although grafts with large muscular component may be uniquely susceptible to ischemia/reperfusion (I/R) syndrome, the safe cold ischemia time in VCA has not been established. We investigated the effects of cold ischemia on innate immune response and recipient survival in a murine orthotopic hindlimb transplantation model. Surprisingly, mice receiving grafts exposed to 6h or longer of cold storage demonstrated reduced survival and massive elevations in serum creatinine, BUN and creatine kinase, as compared to 1h of cold storage recipients...
March 30, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28371193/chronic-allograft-deterioration-ndash-a-clinical-reality-in-vascularized-composite-allotransplantation
#5
EDITORIAL
N Krezdorn, B Pomahac
The first successful transplantation of a vascularized composite tissue allotransplantation (VCA)-NDASH- a hand -NDASH- was achieved in 1998. However, it was not until the first partial face transplant was performed in France in 2005 that the world first witnessed with fascination the vast implications of vascularized composite allotransplantation (VCA). Since then, there have been over 107 upper extremities and 35 face transplantations, with the longest follow up of 18 years for hand transplantation (1), and 10 years for face transplantation...
March 30, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28361279/outcomes-after-hand-and-upper-extremity-transplantation
#6
Jaimie T Shores, Veronika Malek, W P Andrew Lee, Gerald Brandacher
Hand and upper extremity transplantation (HUET) has emerged as the most frequently performed reconstructive procedure in the burgeoning field of vascularized composite allotransplantation (VCA). VCA refers to a form of transplant with multiple tissue types that represents a viable treatment option for devastating injuries where conventional reconstruction would be unable to restore form and function. As hand transplantation becomes increasingly more common, discussions on advantages and disadvantages of the procedure seem to intensify...
May 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28359676/transplantation-of-the-decellularized-tracheal-allograft-in-animal-model-rabbit
#7
Reza Ershadi, Mohamadbagher Rahim, Siavash Jahany, Siamak Rakei
BACKGROUND: It has been difficult to perform tracheal allotransplantation without immunosuppression. To determine whether decellularized trachea can be used in tracheal replacement, we evaluated the viability of decellularized tracheal allografts in a rabbit model of immunosuppressant-free transplantation. METHOD: Half allograft (Group 1, n = 7) was harvested from adult New Zealand white rabbits, subjected to a detergent-enzymatic method (containing sodium deoxycholate/DNase lavations) of decellularization for as many cycles as needed, and the other half was stored in phosphate-buffered saline at 4°C as a control (Group 2, n = 7)...
March 27, 2017: Asian Journal of Surgery
https://www.readbyqxmd.com/read/28358858/a-preclinical-evaluation-of-alternative-site-for-islet-allotransplantation
#8
Chengshi Wang, Xiaojiong Du, Sirong He, Yujia Yuan, Pengfei Han, Dan Wang, Younan Chen, Jingping Liu, Bole Tian, Guang Yang, Shounan Yi, Fabao Gao, Zhihui Zhong, Hongxia Li, Jingqiu Cheng, Yanrong Lu
The bone marrow cavity (BMC) has recently been identified as an alternative site to the liver for islet transplantation. This study aimed to compare the BMC with the liver as an islet allotransplantation site in diabetic monkeys. Diabetes was induced in Rhesus monkeys using streptozocin, and the monkeys were then divided into the following three groups: Group1 (islets transplanted in the liver with immunosuppressant), Group 2 (islets transplanted in the tibial BMC), and Group 3 (islets transplanted in the tibial BMC with immunosuppressant)...
2017: PloS One
https://www.readbyqxmd.com/read/28351610/facial-nerve-regeneration-after-facial-allotransplantation-a-longitudinal-clinical-and-electromyographic-follow-up-of-lip-movements-during-speech
#9
Miet De Letter, Sarah Vanhoutte, Annelies Aerts, Patrick Santens, Hubert Vermeersch, Nathalie Roche, Filip Stillaert, Philip Blondeel, Kristiane Van Lierde
INTRODUCTION: Facial allotransplantation constitutes a reconstructive option after extensive damage to facial structures. Functional recovery has been reported but remains an issue. CASE REPORT - METHODS: A patient underwent facial allotransplantation after a ballistic injury with extensive facial tissue damage. Speech motor function was sequentially assessed clinically, along with repeated electromyography of lip movements during a follow-up of 3 years. RESULTS: Facial nerve recovery could be demonstrated within the first month, followed by a gradual increase in electromyographic amplitude and decrease in reaction times...
March 10, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28346435/aav9-mediated-engineering-of-autotransplanted-kidney-of-non-human-primates
#10
S Tomasoni, P Trionfini, N Azzollini, L Zentilin, M Giacca, S Aiello, L Longaretti, E Cozzi, N Baldan, G Remuzzi, A Benigni
Ex vivo gene transfer to the graft before transplantation is an attractive option for circumventing systemic side effects of chronic anti-rejection therapy. Gene delivery of the immunomodulatory protein CTLA4-Ig prevented chronic kidney rejection in a rat model of allotransplantation without the need for systemic immunosuppression. Here, we generated AAV2 and AAV9 vectors encoding for LEA29Y, an optimized version of CTLA4-Ig. Both LEA29Y vectors were equally efficient for reducing T-cell proliferation in vitro...
March 27, 2017: Gene Therapy
https://www.readbyqxmd.com/read/28340673/the-advent-of-vascularized-composite-allotransplantation
#11
REVIEW
Curtis L Cetrulo, Zhi Yang Ng, Jonathan M Winograd, Kyle R Eberlin
Modern microsurgical techniques have made possible a broad spectrum of novel means for the reconstruction of complex bone and soft tissue defects. These techniques, in combination with developments in transplant immunology, have led to successful hand and facial allotransplantation and achievement of the highest rung in the reconstructive ladder - truly replacing like with like. The utilization of contemporary microsurgical technique in the context of vascularized composite allotransplantation (VCA) (1) permits successful technical execution and feasibility of VCA, (2) facilitates the study of immunologic tolerance in VCA preclinical models, and (3) optimizes functional VCA outcomes...
April 2017: Clinics in Plastic Surgery
https://www.readbyqxmd.com/read/28328655/vascularized-composite-allotransplantation-an-emerging-concept-for-burn-reconstruction
#12
Zhi Yang Ng, Alexandre G Lellouch, Tessa Drijkoningen, Irene A Chang, David H Sachs, Curtis L Cetrulo
Vascularized composite allotransplantation (VCA) has demonstrated utility in the reconstruction of extensive soft-tissue defects following severe burns. However, pre-VCA events such as multiple transfusions, previous transplantation and pregnancies, the use of skin allografts, and mechanical support devices may result in sensitization and ultimately exclude a burn patient, who may benefit most through VCA, from a hand or face transplant. The authors sought to identify the immunologic challenges involved. All reported VCA cases up to July 2016 were reviewed...
March 15, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28303603/human-il-6-il-17-il-1%C3%AE-and-tnf-%C3%AE-differently-regulate-the-expression-of-pro-inflammatory-related-genes-tissue-factor-and-swine-leukocyte-antigen-class-i-in-porcine-aortic-endothelial-cells
#13
Hanchao Gao, Lu Liu, Yanli Zhao, Hidetaka Hara, Pengfei Chen, Jia Xu, Jia Tang, Ling Wei, Zesong Li, David K C Cooper, Zhiming Cai, Lisha Mou
BACKGROUND: Pro-inflammatory cytokines play important pathological effects in various diseases and allotransplantation; however, their pathological role in xenotransplantation remains elusive. In pig-to-human cell or organ transplantation, whether porcine cells or organs are activated by human cytokines or not as an important question needs to be investigated. METHODS: We investigated the effect of human IL-6, IFN-γ, IL-17, IL-1β, and TNF-α in xenotransplantation using several in vitro models and porcine aortic endothelial cells (PAECs) as target cells...
March 17, 2017: Xenotransplantation
https://www.readbyqxmd.com/read/28303433/the-decade-of-face-transplant-outcomes
#14
Maria Siemionow
At the 10th year anniversary of the first face transplantation, 37 patients worldwide, were the recipients of faces coming from human donors. Five patients died due to complications, noncompliance with immunosuppressive medications and development of cancer. Despite the initial debates and ethical concerns, face transplantation became a clinical reality with satisfactory functional outcomes. The areas of controversy still include the impact of life-long immunosuppression on otherwise healthy patients as well as the selection process of face transplant candidates...
May 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28280376/single-donor-islet-transplantation-in-type-1-diabetes-patient-selection-and-special-considerations
#15
REVIEW
Jacob A Tatum, Max O Meneveau, Kenneth L Brayman
Type 1 diabetes mellitus is an autoimmune disorder of the endocrine pancreas that currently affects millions of people in the United States. Although the disease can be managed with exogenous insulin administration, the ultimate cure for the condition lies in restoring a patient's ability to produce their own insulin. Islet cell allotransplantation provides a means of endogenous insulin production. Though far from perfected, islet transplants are now a proven treatment for type 1 diabetics. However, proper patient selection is critical for achieving optimal outcomes...
2017: Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy
https://www.readbyqxmd.com/read/28252516/decellularization-of-the-porcine-ear-generates-a-biocompatible-nonimmunogenic-extracellular-matrix-platform-for-face-subunit-bioengineering
#16
Jérôme Duisit, Giuseppe Orlando, Donovan Debluts, Louis Maistriaux, Daela Xhema, Yann-Alex J de Bisthoven, Cesare Galli, Andrea Peloso, Catherine Behets, Benoît Lengelé, Pierre Gianello
OBJECTIVE: The purpose of this study was to assess whether perfusion-decellularization technology could be applied to facial grafts. BACKGROUND: Facial allotransplantation remains an experimental procedure. Regenerative medicine techniques allow fabrication of transplantable organs from an individual's own cells, which are seeded into extracellular matrix (ECM) scaffolds from animal or human organs. Therefore, we hypothesized that ECM scaffolds also can be created from facial subunits...
March 1, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28249789/hand-transplantation-evolution-of-a%C3%A2-personal-outlook
#17
REVIEW
W P Andrew Lee
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...
February 26, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28247734/-rare-case-giant-cancerous-tumor-forgotten-after-kidney-heterotopic-transplantation
#18
Y A Tyapochkin, V F Zubarev, A V Golikov, T V Afanasyeva, A S Klimkin
The annual number of cases of kidney transplantation in the Russian Federation varies from 900 to 1000. The generally accepted method of operation is the heterotopic allotransplantation into one of the iliac region. Proper kidney recipient are psychologically "forgotten", often completely lost sight of postoperative monitoring, especially in the long term, but may remind of itself in extraordinary cases like ours.
August 2016: Urologii︠a︡
https://www.readbyqxmd.com/read/28247507/development-of-retrocorneal-membrane-following-pig-to-monkey-penetrating-keratoplasty
#19
Whayoung Lee, Alex Mammen, Deepinder K Dhaliwal, Cassandra Long, Yuko Miyagawa, David Ayares, David K C Cooper, Hidetaka Hara
Recent reports of long-term survival after wild-type (WT) pig-to-monkey corneal xenotransplantation are encouraging. We experienced the rapid development of retrocorneal membranes, a rare complication after corneal allotransplantation (although seen in infants and young children). The original specific aim of the study was to determine the factors associated with successful (young) pig corneal transplantation in monkeys. However, when it was obvious that retrocorneal membranes rapidly developed, our aims became to determine the factors involved in its development after both WT and Genetically engineered (GE ) pig corneal xenotransplantation and to investigate the characteristics of the retrocorneal membrane...
January 2017: Xenotransplantation
https://www.readbyqxmd.com/read/28224630/the-current-status-of-human-laryngeal-transplantation-in-2017-a-state-of-the-field-review
#20
REVIEW
Giri Krishnan, Charles Du, Jonathan M Fishman, Andrew Foreman, David G Lott, Gregory Farwell, Peter Belafsky, Suren Krishnan, Martin A Birchall
OBJECTIVES: Human laryngeal allotransplantation has long been contemplated as a surgical option following laryngectomy, but there is a paucity of information regarding the indications, surgical procedure, and patient outcomes. Our objectives were to identify all human laryngeal allotransplants that have been undertaken and reported in the English literature and to evaluate the success of the procedure. DATA SOURCES: MEDLINE, Embase, Current Index to Nursing and Allied Health Literature, Web of Science and Scopus, and the Gray literature...
February 22, 2017: Laryngoscope
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