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Sainte-Foy-lès-Lyon, France

Jowsey-Gregoire S.G.,Mayo Medical School | Kumnig M.,Innsbruck Medical University | Morelon E.,Nephrology and Clinical Immunology | Morelon E.,University of Lyon | And 3 more authors.
Transplantation | Year: 2016

Under the auspices for the International Society on Hand and Composite Tissue Allotransplantation, a section of The Transplantation Society (IHCTAS), a meeting was convened on March 21-22, 2014 in Paris to review the following areas that were deemed significant in the understanding of the psychosocial evaluation and outcomes of upper extremity transplant recipients: required domains of the evaluation, screening instruments, clinical monitoring pretransplant, clinical monitoring posttransplant, patient and team expectations, body image, psychiatric complications, functional goals and quality of life, ethics and media relations. Experts in the fields of psychiatry and psychology, transplantation, social work, ethics, and transplant administration met and reviewed center experiences and literature. The attendees highlighted the importance and the complexity of the psychiatric assessment in this field of transplantation. Moreover, the necessity to develop common instruments and evaluation protocols to predict psychosocial outcomes as well as to understand whether we are transplanting the right patients and how the transplantation is affecting the patients were pointed out. Psychiatric complications in upper extremity transplanted patients have been reported by the majority of teams. Preexisting psychiatric difficulties, the initial trauma of amputation, or adjusting to the transplantation process itself (especially the medical follow-up and rehabilitation process) appeared to be important factors. Monitoring during the whole follow-up was recommended to detect psychiatric issues and to facilitate and ensure long-term adherence. The participants proposed an annual meeting format to build upon the findings of this inaugural meeting to be called the Chauvet Workgroup meeting. © 2016 Wolters Kluwer Health, Inc. All rights reserved.

Radice A.,Microbiology Institute | Bianchi L.,Nephrology and Clinical Immunology | Maggiore U.,University of Parma | Vaglio A.,University of Parma | Sinico R.A.,Nephrology and Clinical Immunology
Clinical Chemistry and Laboratory Medicine | Year: 2013

Background: PR3-ANCA, the serological marker of granulomatosis with polyangiitis (GPA), is usually detected by immunometric assays, with purified PR3 directly coated onto the solid-phase. Novel methods for PR3-ANCA detection have been developed to improve the performance of traditional PR3-ANCA specific assays, but little is known about their diagnostic performance in real-life clinical settings. This study aimed to compare the performance of nine different commercial PR3-ANCA specific assays, including traditional and newer ones, for the diagnosis of GPA. Methods: The evaluated assays for PR3-ANCA detection were representative of the first, second, and third generation tests (direct, capture and anchor assays, respectively). A third-generation assay employing both human and recombinant PR3 was also evaluated. The study population consisted of 55 GPA patients, 175 disease controls (representing most diseases in differential diagnosis with primary small-vessel vasculitis) including 52 with microscopic polyangiitis, and 20 healthy subjects. We performed the primary evaluation of test sensitivity using cut-off points which provided adequate and identical specificity for each test. Results: Although specificity and area under the ROC curve did not differ significantly between the different assays, substantial differences in sensitivity at 98%-specificity were found in some instances (p<0.001). Compared to first generation direct PR3-ANCA specific assays, some of the second and third generation tests increased the positive predictive value (PPV) for GPA diagnosis. Conclusions: Some of the newer PR3-ANCA specific assays have better PPV than traditional ones. © 2013 by Walter de Gruyter Berlin Boston.

Mahler M.,INOVA Diagnostics Inc. | Radice A.,Microbiology Institute | Yang W.,INOVA Diagnostics Inc. | Bentow C.,INOVA Diagnostics Inc. | And 3 more authors.
Clinica Chimica Acta | Year: 2012

Background: The detection of anti-proteinase 3 (PR3) and anti-myeloperoxidase (MPO) autoantibodies represents a serological hallmark in the diagnosis of small vessel vasculitis such as granulomatosis with polyangiitis (GPA) and microscopic polyangiitis (MPA). We evaluated novel chemiluminescence assays (CIAs) for PR3- and MPO-ANCA detection and investigated their utility for disease activity monitoring. Methods: Sera collected from GPA (n = 41) and MPA (n = 30) patients were tested by QUANTA Lite® PR-3 and MPO ELISAs (INOVA Diagnostics) and by the QUANTA Flash™ PR3 and MPO CIAs (INOVA). Precision and linearity were analyzed following reference guidelines. The recently launched reference sera for PR3-and MPO-ANCA (Centers of Disease Control and prevention, CDC) were used to establish international units for the new assays. Disease activity was determined using the Birmingham Vasculitis Activity Score. Results: The international standards for PR3-and MPO-ANCA yielded results of 403. CU and 332. CU in the novel CIAs, respectively. The linearity analysis showed linear regression values > 0.97 with slopes between 0.96 and 1.04. Total variation obtained from the precision study showed CV% of ≤ 7.4 for PR3-ANCA and ≤ 12.8 for MPO-ANCA. Good agreement (Spearman rho ≥ 0.89) was observed between CIA and ELISA. PR3-ANCA determined by CIA, but not by ELISA, was correlated with disease activity. No correlation was found for MPO-ANCA. Conclusion: The novel PR3- and MPO-ANCA CIAs show good precision, linearity and correlation to ELISA. In addition, PR3-ANCA by CIA show correlation with disease activity. © 2012 Elsevier B.V.

Koenig A.,Nephrology and Clinical Immunology | Mariat C.,Jean Monnet University | Mousson C.,University Hospital | Wood K.J.,University of Oxford | And 2 more authors.
Transplantation | Year: 2016

Overlooked for decades, the humoral alloimmune response is increasingly recognized as a leading cause of graft loss after transplantation. However, improvement in the diagnosis of antibody-mediated rejection has not yet translated into better outcomes for transplanted patients. After an update on B cell physiology and antibody generation, the 2015 Beaune Seminar in Transplant Research challenged the conventional view of antibody-mediated rejection pathophysiology and discussed the latest promising therapeutic approaches. © 2016 Wolters Kluwer Health, Inc. All rights reserved.

Kanitakis J.,Edouard Herriot Hospital | Petruzzo P.,Nephrology and Clinical Immunology | Gazarian A.,Clinique Du Parc | Karayannopoulou G.,Aristotle University of Thessaloniki | And 5 more authors.
Transplantation | Year: 2016

Background. Vascularized composite tissue allografts (VCA) can undergo rejection, manifesting pathologically with skin changes that form the basis of the Banff 2007 classification of VCA rejection.Methods.We have followed 10 human VCA recipients (7 with hand allografts, 3 with face allografts) for pathological signs of rejection. All of them developed episodes of acute rejection. Two patients with hand allografts presented in some of their skin biopsies an as yet unreported pathological finding in human VCA, consisting of capillary thromboses (CT) in the upper dermis. Results. Capillary thrombosis was associated with other typical changes of grade II to III VCA rejection, namely, perivascular T cell infiltrates, but not with vascular C4d deposits (in formalin-fixed tissue). Clinically, the lesions presented as red or violaceous (lichenoid) cutaneous maculopapules. The first patient had several episodes of acute rejection during the 7-year follow-up. The second patient developed donor-specific antibodies; some months after CTwere first observed, he developed chronic rejection leading to partial amputation of the allograft. Pathological examination of the skin showed graft vasculopathy and occasional C4d deposits in cutaneous capillaries. Conclusions. Capillary thrombosis seems to be a novel pathologic finding associated with human VCA rejection. Although its mechanism (immunologic vs nonimmunologic) remains unclear, this finding could carry an unfavorable prognostic significance, prompting close monitoring of the patients for severe/chronic rejection. © 2016 Wolters Kluwer Health, Inc. All rights reserved.

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