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Joseph Château, Aram Gazarian, Fabien Boucher, Lionel Badet, Fabienne Braye, Michel Saint-Cyr, Ali Mojallal
We report a case of a young double-hand allotransplant patient who presented with a full-thickness skin necrosis of the dorsum of the left hand after vascular compromise of the allotransplantation. Considering the lack of viable dorsal tissue overlying the extensor tendons and the need for early hand rehabilitation, an ultrathin pedicled groin flap was used for the coverage. This procedure resulted in salvaging the allotransplantation, and the patient was able to successfully return to work after his surgery...
September 2016: Plastic and Reconstructive Surgery. Global Open
Bowen Gao, Qingxiong Yu, Feng Xie, Lingling Sheng, Xiyuan Mao, Qingfeng Li, Hainan Zhu
BACKGROUND: Conventional reconstructive methods fail to achieve satisfactory results in total eyelid defect cases. Vascularized composite tissue allotransplantation might provide both good appearance and function for these patients. The structure of the eyelid is exceptional because it simultaneously consists of skin, connective tissue, the striated muscle, fiber structure, aponeuroses, and mucosa. Thus, before clinical application of eyelid allotransplantation, more experiments are needed to clarify the impact of ischemia, immunal suppressive agents, and deinnervation effects on these sophisticated structures...
October 13, 2016: Ophthalmic Plastic and Reconstructive Surgery
Martin J Hoogduijn
No abstract text is available yet for this article.
October 12, 2016: Transplantation
M Clerc, J Prothet, T Rimmelé
Composite tissue allotransplantation (CTA) is a complex procedure requiring a multidisciplinary collaboration between surgeons, anesthetists, and transplantation specialists. We will describe the perioperative management of a bilateral forearm allograft performed at our facility. A 40-year-old man who lost both forearms was registered on the transplant waiting list; a suitable graft was available 11months later. Anesthesia required planning for vascular access, hemodynamic monitoring, fluid therapy management and prevention of deep vein thrombosis...
June 2016: Hand Surgery and Rehabilitation
Bo Deng, Tatyana Bondarenko, Oleksandr Pakhomov
Transplantation of hormone producing cells is an experimental endocrine dysfunction treatment. The present study investigated the effects of orchidectomy (OE) and transplantation of interstitial cell suspension (ICS) on rat sexual behavior. Adult experimental animals were divided into two populations. One of these populations had sexual experience before the experiment, another did not have one. Each population was divided into three groups: control group and two orchidectomized groups. One of the orcidectomized groups was treated with transplantation of ICS, another one was transplantated with vehicle...
September 30, 2016: Cell Transplantation
E J Caterson
No abstract text is available yet for this article.
October 2016: Journal of Craniofacial Surgery
Arash Momeni, Benjamin Chang, L Scott Levin
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...
November 2016: Journal of Materials Science. Materials in Medicine
Sa-Hyeok Hong, Seok-Chan Eun
As reconstructive transplantation is gaining popularity as a viable alternative for upper limb amputees, it is becoming increasingly important for plastic surgeons to renew surgical skills and knowledge of this area. Forelimb allotransplantation research has been performed previously in rodent and swine models. However, preclinical canine forelimb allotransplantation studies are lacking in the literature. The purpose of this paper is to provide an overview of the surgical skills necessary to successfully perform forelimb transplantation in canines as a means to prepare for clinical application...
2016: BioMed Research International
Stefan Salminger, Agnes Sturma, Aidan D Roche, Laura A Hruby, Tatjana Paternostro-Sluga, Martin Kumnig, Marina Ninkovic, Gerhard Pierer, Stefan Schneeberger, Markus Gabl, Adam Chelmonski, Jerzy Jablecki, Oskar C Aszmann
BACKGROUND: Hand-transplantation and improvements in the field of prostheses opened new frontiers in restoring hand function in below-elbow amputees. Both concepts aim at restoring reliable hand function, however, the indications, advantages and limitations for each treatment must be carefully considered depending on level and extent of amputation. Here we report our findings of a multi-center cohort study comparing hand function and quality-of-life of people with transplanted versus prosthetic hands...
2016: PloS One
Wayne J Hawthorne
For more than two decades we have been refining advances in islet cell transplantation as a clinical therapy for patients suffering from type 1 diabetes. A great deal of effort has gone to making this a viable therapy for a broader range of patients with type 1 diabetes. Clinical results have progressively improved, demonstrating clinical outcomes on par with other organ transplants, specifically in terms of insulin independence, graft and patient survival. We are now at the point where islet cell transplantation, in the form of allotransplantation, has become accepted as a clinical therapy in adult patients affected by type 1 diabetes, in particular those suffering from severe hypoglycaemic unawareness...
2016: Advances in Experimental Medicine and Biology
Elisa Cantarelli, Antonio Citro, Silvia Pellegrini, Alessia Mercalli, Raffaella Melzi, Erica Dugnani, Tatiana Jofra, Georgia Fousteri, Anna Mondino, Lorenzo Piemonti
BACKGROUND: The aim of this study was to characterize the immune response against intra-bone marrow (BM-Tx) or intra-liver (Liver-Tx) transplanted islets in the presence or in the absence of immunosuppression. METHODS: Less (C57BL/6 in Balb/c) and highly (Balb/c in C57BL/6) stringent MHC fully-mismatched mouse models were used to evaluate the alloimmune response. Single antigen-mismatched mouse model (C57BL/6 RIP-GP in C57BL/6) was used to evaluate the antigen-specific immune response...
August 29, 2016: Transplantation
Yi-Ting Yen, Jun-Neng Roan, Shih-Yuan Fang, Shi-Wei Chang, Yau-Lin Tseng, Chen-Fuh Lam
BACKGROUND: As endothelial progenitor cells (EPCs) attenuated acute lung injury (ALI) in rabbit model, we hypothesized that autologous EPCs preserved lung graft function during the acute reperfusion period of lung transplantation and tested the therapeutic potential of EPCs in a porcine model of lung transplantation with prolonged graft ischemia. METHODS: Day-7 EPCs isolated from the recipient subjects or plain culture media were administered into the left pulmonary artery immediately before restoration of pulmonary blood flow in a porcine lung allotransplantation model, with the transplantation surgeons blinded to the content of injection...
August 2016: Annals of Translational Medicine
H Jiang, A T Liu
Postburn facial scar contracture, which can cause disfigurement and functional impairment, is a major therapeutic challenge. Except for some scars with severe functional impairments such as ectropion of lid, obstruction of nostril, microstomia, and so on, other kinds of facial scars are recommended to be reconstructed after they become sufficiently softened. The selection of specific methods depends on the characteristics of the facial scar. The methods includ direct closure after resection, full or split-thickness skin transplantation, pedicled flap, distant flap, and free flap transfer, and tissue expansion...
August 20, 2016: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
C Anton Fries, Carole Y Villamaria, Jerry R Spencer, Rory F Rickard, Vijay S Gorantla, Michael R Davis
BACKGROUND: The restoration of complex tissue deficits with vascularized composite allotransplantation is a paradigm shift in reconstructive surgery. Clinical adoption of vascularized composite allotransplantation is limited by the need for systemic immunosuppression, with associated morbidity and mortality. Small-animal models lack the biological fidelity and preclinical relevance to enable translation of immunologic insights to humans. Large-animal models have been described; however, limitations persist, including the inability of heterotopic models to evaluate functional nerve regeneration, and the sensitivity of primates to toxicity of immunosuppressive drugs...
September 2016: Plastic and Reconstructive Surgery
Jorge Bonastre, Luis Landín, Pedro Bolado, César Casado-Sánchez, Eduardo López-Collazo, Jesús Díez
BACKGROUND: Previous studies on solid organ transplantation have shown that cold ischemia contributes to the development of chronic allograft vasculopathy. The authors evaluated the effect of cold ischemia on the development of chronic rejection in vascularized composite allotransplantation. METHODS: Thirty rat hindlimbs were transplanted and divided into two experimental groups: immediate transplantation and transplantation after 7 hours of cold ischemia. The animals received daily low-dose immunosuppression with cyclosporine A for 2 months...
September 2016: Plastic and Reconstructive Surgery
Jin-Guang He, Ting-Liang Wang, Tao Wang, Hua Xu, Yi Zhang, Jia-Sheng Dong
We have previously reported that human dermal bone morphogenic protein receptor (BMPR) IB positive subpopulation had a high osteogenic differentiation potential and may be a promising cell source for allogeneic bone tissue engineering. In this study, the immunologic properties of dermal BMPR-IB+ subpopulation before and after osteogenic differentiation were reported. The results confirmed that dermal BMPR-IB+ cells possessed a similar osteogenic differentiation potential with bone marrow mesenchymal stromal cells in a mouse model...
2016: PloS One
Maciej Zieliński, Agnieszka Tarasewicz, Hanna Zielińska, Magdalena Jankowska, Grażyna Moszkowska, Alicja Dębska-Ślizień, Bolesław Rutkowski, Piotr Trzonkowski
BACKGROUND: CMV infection remains major complication after kidney transplantation, thus diagnostics tools that would improve identification of individuals at risk of development of CMV - related complications are useful. For this reason, searching for proper immunological biomarkers candidates gives hope to individualize antiviral therapy and minimize side effects of antiviral drugs. OBJECTIVES: The purpose of this research was to assess immune assays that can be used to predict the likelihood of CMV viremia after kidney allotransplantation...
October 2016: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
Emili Montserrat, Peter Dreger
The treatment of patients with chronic lymphocytic leukemia (CLL) whose tumor presents the del(17p)/TP53 mutation is a major challenge. Treatment with chemo(immuno)therapy, immunomodulators, or the anti-CD52 monoclonal antibody alemtuzumab produces transient, unsatisfactory responses. Reduced-intensity-conditioning allotransplantation produces sustained progression-free survival and overall survival (40%-60% at 5 years), equivalent to the cure of the disease, even in cases with adverse biomarkers. Unfortunately, despite improvements in this procedure, the non-relapse mortality continues to be high (15%-30%), and only highly selected patients (young, physically fit, with treatment-sensitive disease, not heavily pretreated, and with a fully matched donor) may benefit from the intervention without incurring unacceptable treatment-related risks...
August 2016: Clinical Lymphoma, Myeloma & Leukemia
Jennifer L McRae, Joanne Sj Chia, Sandra A Pommey, Karen M Dwyer
AIM: Regulatory T cells (Treg) are important in mediating immune tolerance and outcomes of allotransplantation. CD4(+) CD25(+) CD39(+) co-expression identifies memory Treg; CD4(+) CD25(-) CD39(+) memory T effectors. We sought to determine CD4(+) CD25(+/-) CD39(+) expression from the peripheral blood of patients with end stage renal failure, following transplantation and during episodes of acute cellular rejection. METHODS: CD4(+) T cells were isolated from peripheral blood leucocytes and analysed for CD25 and CD39 expression by flow cytometry...
August 12, 2016: Nephrology
D Jane Holmes-Walker, Thomas W H Kay
PURPOSE OF REVIEW: Islet transplantation has made great progress in recent years. This is a remarkable technical feat but raises the question of what the long-term benefits and risks are for type I diabetes recipients. RECENT FINDINGS: Graft survival continues to improve, and recent multicenter studies show that islet transplantation is particularly effective to prevent hypoglycemic events even in those who do not become insulin-independent and to achieve excellent glycemic control...
October 2016: Current Opinion in Organ Transplantation
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