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Naaz A, Turnquist HR, Gorantla VS, Little SR. Drug delivery strategies for local immunomodulation in transplantation: Bridging the translational gap. Adv Drug Deliv Rev 2024:115429. [PMID: 39142608 DOI: 10.1016/j.addr.2024.115429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 08/07/2024] [Accepted: 08/11/2024] [Indexed: 08/16/2024]
Abstract
Drug delivery strategies for local immunomodulation hold tremendous promise compared to current clinical gold-standard systemic immunosuppression as they could improve the benefit to risk ratio of life-saving or life-enhancing transplants. Such strategies have facilitated prolonged graft survival in animal models at lower drug doses while minimizing off-target effects. Despite the promising outcomes in preclinical animal studies, progression of these strategies to clinical trials has faced challenges. A comprehensive understanding of the translational barriers is a critical first step towards clinical validation of effective immunomodulatory drug delivery protocols proven for safety and tolerability in pre-clinical animal models. This review overviews the current state-of-the-art in local immunomodulatory strategies for transplantation and outlines the key challenges hindering their clinical translation.
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Affiliation(s)
- Afsana Naaz
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, PA 15261, United States; Thomas E. Starzl Transplantation Institute, University of Pittsburgh, Pittsburgh, PA, 15213, United States.
| | - Heth R Turnquist
- Thomas E. Starzl Transplantation Institute, University of Pittsburgh, Pittsburgh, PA, 15213, United States; Department of Surgery, University of Pittsburgh, Pittsburgh, PA, 15213, United States; Department of Immunology, University of Pittsburgh, Pittsburgh, PA, 15213, United States; McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, 15219, United States.
| | - Vijay S Gorantla
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, 15219, United States; Departments of Surgery, Ophthalmology and Bioengineering, Wake Forest School of Medicine, Wake Forest Institute of Regenerative Medicine, Winston Salem, NC, 27101, United States.
| | - Steven R Little
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, PA 15261, United States; Department of Surgery, University of Pittsburgh, Pittsburgh, PA, 15213, United States; Department of Immunology, University of Pittsburgh, Pittsburgh, PA, 15213, United States; McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, 15219, United States; Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, United States; Department of Ophthalmology, University of Pittsburgh, Pittsburgh, PA 15213, United States; Department of Pharmaceutical Sciences, University of Pittsburgh, Pittsburgh, PA 15261, United States.
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D'Aragon F, Selzner M, Breau R, Masse MH, Lamontagne F, Masse M, Chassé M, Carrier FM, Cardinal H, Chaudhury P, Weiss M, Lauzier F, Turgeon AF, Frenette AJ, Bolduc B, Ducharme A, Lamarche C, Couture E, Holdsworth S, Bertholz L, Talbot H, Slessarev M, Luke P, Boyd JG, Shamseddin MK, Burns KEA, Zaltzman J, English S, Knoll G, Dhanani S, Healey A, Hanna S, Rochwerg B, Oczkowski SJW, Treleaven D, Meade M. Calcineurin Inhibitor in NEuRoloGically deceased donors to decrease kidney delayed graft function study: study protocol of the CINERGY Pilot randomised controlled trial. BMJ Open 2024; 14:e086777. [PMID: 38871657 PMCID: PMC11177676 DOI: 10.1136/bmjopen-2024-086777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Accepted: 05/17/2024] [Indexed: 06/15/2024] Open
Abstract
INTRODUCTION Most solid organ transplants originate from donors meeting criteria for death by neurological criteria (DNC). Within the organ donor, physiological responses to brain death increase the risk of ischaemia reperfusion injury and delayed graft function. Donor preconditioning with calcineurin inhibition may reduce this risk. METHODS AND ANALYSIS We designed a multicentre placebo-controlled pilot randomised trial involving nine organ donation hospitals and all 28 transplant programmes in the Canadian provinces of Ontario and Québec. We planned to enrol 90 DNC donors and their approximately 324 organ recipients, totalling 414 participants. Donors receive an intravenous infusion of either tacrolimus 0.02 mg/kg over 4 hours prior to organ retrieval, or a matching placebo, while monitored in an intensive care unit for any haemodynamic changes during the infusion. Among all study organ recipients, we record measures of graft function for the first 7 days in hospital and we will record graft survival after 1 year. We examine the feasibility of this trial with respect to the proportion of all eligible donors enrolled and the proportion of all eligible transplant recipients consenting to receive a CINERGY organ transplant and to allow the use of their health data for study purposes. We will report these feasibility outcomes as proportions with 95% CIs. We also record any barriers encountered in the launch and in the implementation of this trial with detailed source documentation. ETHICS AND DISSEMINATION We will disseminate trial results through publications and presentations at participating sites and conferences. This study has been approved by Health Canada (HC6-24-c241083) and by the Research Ethics Boards of all participating sites and in Québec (MP-31-2020-3348) and Clinical Trials Ontario (Project #3309). TRIAL REGISTRATION NUMBER NCT05148715.
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Affiliation(s)
- Frederick D'Aragon
- Department of Anesthesiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Markus Selzner
- Multi-Organ Transplant Program, Toronto General Hospital, Toronto, Quebec, Canada
- Department of General Surgery, University of Toronto and Toronto General Hospital, University Health Network, Toronto, Ontario, Canada
| | - Ruth Breau
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Ontario, Canada
| | - Marie-Hélène Masse
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Francois Lamontagne
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Quebec, Canada
- Department of Medicine, Universite de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Mélanie Masse
- Department of Medicine, Universite de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Michael Chassé
- Department of Medicine, Université de Montréal, Montreal, Québec, Canada
| | - François-Martin Carrier
- Department of Anesthesiology, Centre Hospitalier de l'Université de Montréal, Montréal, Québec, Canada
| | - Héloïse Cardinal
- Department of Medicine, Université de Montréal, Montreal, Québec, Canada
| | - Prosanto Chaudhury
- Department of Surgery and Oncology, McGill University, Montreal, Québec, Canada
- Transplant Québec, Montréal, Québec, Canada
| | - Matthew Weiss
- Transplant Québec, Montreal, Québec, Canada
- Population Health and Optimal Health Practives Research Unit (Trauma - Emergency - Critical Care Medicine), Centre de Recherche du CHU de Québec - Université Laval, Quebec, Quebec, Canada
| | - Francois Lauzier
- Population Health and Optimal Health Practives Research Unit (Trauma - Emergency - Critical Care Medicine), Centre de Recherche du CHU de Québec - Université Laval, Quebec, Quebec, Canada
- Department of Medicine, Université Laval, Québec City, Québec, Canada
- Department of Anesthesiology and Critical Care Medicine, Division of Critical Care Medicine, Université Laval, Québec City, Québec, Canada
| | - Alexis F Turgeon
- Population Health and Optimal Health Practives Research Unit (Trauma - Emergency - Critical Care Medicine), Centre de Recherche du CHU de Québec - Université Laval, Quebec, Quebec, Canada
- Department of Anesthesiology and Critical Care Medicine, Division of Critical Care Medicine, Université Laval, Québec City, Québec, Canada
| | | | - Brigitte Bolduc
- Department of Pharmacy, Centre integre universitaire de sante et de services sociaux de l'Estrie Centre hospitalier universitaire de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Anique Ducharme
- Department of Medicine, Université de Montréal, Montreal, Québec, Canada
- Montreal Heart Institute, Montreal, Québec, Canada
| | - Caroline Lamarche
- Department of Medicine, Université de Montréal, Montreal, Québec, Canada
- Hôpital Maisonneuve-Rosemont Research Institute, Montréal, Québec, Canada
| | - Etienne Couture
- Department of Anesthesiology and Critical Care, Quebec Heart & Lung Institute, Université Laval, Quebec, Quebec, Canada
| | - Sandra Holdsworth
- Canadian Donation and Transplant Research Program, Edmonton, Alberta, Canada
| | - Liz Bertholz
- Canadian Donation and Transplant Research Program, Edmonton, Alberta, Canada
| | - Heather Talbot
- Canadian Donation and Transplant Research Program, Edmonton, Alberta, Canada
| | - Marat Slessarev
- Department of Medicine, Division of Critical Care, Western University, London, Ontario, Canada
| | - Patrick Luke
- Department of Surgery, Division of Urology, Western University, London, Ontario, Canada
| | - John Gordon Boyd
- Department of Medicine, Division of Neurology, Queen's University, Kingston, Ontario, Canada
- Department of Critical Care Medicine, Queen's University, Kingston, Ontario, Canada
| | - M Khaled Shamseddin
- Department of Medicine, Division of Nephrology, Queen's University, Kingston, Ontario, Canada
| | - Karen E A Burns
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada
- Li Ka Shing Knowledge Institute, University Health Toronto - St. Michael's Hospital, Toronto, Ontario, Canada
| | - Jeffrey Zaltzman
- Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Shane English
- Division of Critical Care, Department of Medicine, University of Ottawa, Ottawa, Ontario, Canada
- Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - Greg Knoll
- Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
- Department of Medicine, Division of Nephrology, University of Ottawa, Ottawa, Ontario, Canada
| | - Sonny Dhanani
- Department of Pediatrics, Division of Critical Care, Children's Hospital of Eastern Ontario and University of Ottawa, Ottawa, Ontario, Canada
| | - Andrew Healey
- Department of Medicine, Division of Emergency Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Steven Hanna
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Ontario, Canada
| | - Bram Rochwerg
- Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | | | - Darin Treleaven
- Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Maureen Meade
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Ontario, Canada
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Lawson B, Williams B. Identifying organ donors attended by prehospital healthcare professionals - A scoping review. Int Emerg Nurs 2024; 74:101448. [PMID: 38703620 DOI: 10.1016/j.ienj.2024.101448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 02/27/2024] [Accepted: 03/26/2024] [Indexed: 05/06/2024]
Abstract
INTRODUCTION Organ donation is a life-saving intervention that provides hope for patients with end-stage organ failure, improving their longevity and quality of life. However, the demand for organs far exceeds the supply, leading to a significant disparity between patients on transplant waiting lists and the availability of suitable organs. To address this issue, innovative strategies, such as uncontrolled donation after circulatory death (uDCD) programs, have been proposed to expand the donor pool to the prehospital setting. AIM This study aimed to systematically map the literature and comprehensively evaluate the involvement of prehospital healthcare professionals in identifying potential organ donors, as well as the barriers and systems impacting this process. METHODS A scoping literature review was conducted guided by the PRISMA Extension for Scoping Reviews. Four electronic databases and grey literature were searched for articles examining the participation of prehospital healthcare professionals in the organ or tissue donation process. Relevant data were extracted, organised into narrative and tabular formats, and presented. RESULTS A total of 33 articles were included for analysis, predominantly focusing on uDCD programs. The review identified a limited evidence-base regarding the role of prehospital healthcare professionals in organ donation. Four common themes emerged: discrepancies in criteria, decision-making processes, bridging strategies, and ethical considerations. CONCLUSION This scoping literature review highlights the significant role of prehospital healthcare professionals in identifying and recruiting organ donors from non-traditional settings. Established uDCD systems show promise in alleviating the burden on transplant waitlists. However, there is a lack of consensus on enrolment criteria, transportation, and ethical considerations for uDCD. Further research is needed to address these gaps, establish evidence-based guidelines, and ensure the efficient and ethical utilisation of potential organ donors from unconventional settings.
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Affiliation(s)
- Ben Lawson
- Department of Paramedicine, Monash University, Victoria, Australia.
| | - Brett Williams
- Department of Paramedicine, Monash University, Victoria, Australia
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4
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Augusto JF, Benden C, Diekmann F, Zuckermann A. The value of extracorporeal photopheresis as an immunosuppression-modifying approach in solid organ transplantation: a potential solution to an unmet medical need. Front Immunol 2024; 15:1371554. [PMID: 38846942 PMCID: PMC11154098 DOI: 10.3389/fimmu.2024.1371554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 05/07/2024] [Indexed: 06/09/2024] Open
Abstract
Allograft rejection is a critical issue following solid organ transplantation (SOT). Immunosuppressive therapies are crucial in reducing risk of rejection yet are accompanied by several significant side effects, including infection, malignancy, cardiovascular diseases, and nephrotoxicity. There is a current unmet medical need with a lack of effective minimization strategies for these side effects. Extracorporeal photopheresis (ECP) has shown potential as an immunosuppression (IS)-modifying technique in several SOT types, with improvements seen in acute and recurrent rejection, allograft survival, and associated side effects, and could fulfil this unmet need. Through a review of the available literature detailing key areas in which ECP may benefit patients, this review highlights the IS-modifying potential of ECP in the four most common SOT procedures (heart, lung, kidney, and liver transplantation) and highlights existing gaps in data. Current evidence supports the use of ECP for IS modification following SOT, however there is a need for further high-quality research, in particular randomized control trials, in this area.
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Affiliation(s)
- Jean-François Augusto
- Department of Nephrology-Dialysis-Transplantation, University Hospital of Angers, Angers, France
| | | | - Fritz Diekmann
- Renal Transplantation Unit, Department of Nephrology and Kidney Transplantation, Hospital Clinic, Barcelona, Spain
| | - Andreas Zuckermann
- Department of Cardiac Surgery, Medical University of Vienna, Vienna, Austria
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Ravella S. Association between oral nutrition and inflammation after intestinal transplantation. Hum Immunol 2024; 85:110809. [PMID: 38724327 DOI: 10.1016/j.humimm.2024.110809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 04/27/2024] [Accepted: 05/01/2024] [Indexed: 06/04/2024]
Abstract
Intestinal transplantation (Itx) can be a life-saving treatment for certain patient populations, including those patients with intestinal failure (IF) who develop life-threatening complications due to the use of parenteral nutrition (PN). Most patients who have undergone Itx are eventually able to tolerate a full oral diet. However, little guidance or consensus exists regarding optimizing the specific components of an oral diet for Itx patients, including macronutrients, micronutrients and dietary patterns. While oral dietary prescriptions have moved to the forefront of primary and preventive care, this movement has yet to occur across the field of organ transplantation. Evidence to date points to the role of systemic chronic inflammation (SCI) in a wide variety of chronic diseases as well as post-transplant graft dysfunction. This review will discuss current trends in oral nutrition for Itx patients and also offer novel insights into nutritional management techniques that may help to decrease SCI and chronic disease risk as well as optimize graft function.
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6
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Charlès L, Lupon E, Sheth T, Camuzard O, Lellouch AG, Shende C, Farquharson S, Safa K, Cetrulo CL. Immunosuppressant drug monitor: A non-invasive device to measure tacrolimus level in the saliva of transplanted patients. Int J Pharm 2024; 653:123858. [PMID: 38286196 DOI: 10.1016/j.ijpharm.2024.123858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 01/22/2024] [Accepted: 01/24/2024] [Indexed: 01/31/2024]
Abstract
Solid organ and vascularized composite allograft transplantation are pivotal in enhancing both life expectancy and quality of life. However, the significant risk of donor tissue rejection requires lifelong immunosuppressive therapy. Tacrolimus, a common component of immunosuppressive regimens, offers effectiveness in preventing organ rejection but poses challenges due to its narrow therapeutic window and toxicity, making it essential to carefully monitor its concentration. Tacrolimus trough levels are currently measured in blood, requiring frequent blood draws from patients, and results are available after 3 to 6 h. To address the need for a fast, minimally-invasive, and simple method to monitor tacrolimus concentrations, we have assessed a new device for at-home analysis, the Immunosuppressant Drug Monitor (IDM) that can extract, identify and quantify tacrolimus in saliva within 15 min. We included males and females hospitalized at Massachusetts General Hospital Transplant Unit, between the ages of 21 and 65 years, and treated with Tacrolimus. Informed consent, demographic and treatment data were collected. Each subject was asked to provide a 5 mL saliva sample that was de-identified and processed by the IDM, while a 5 mL blood sample was drawn and supplied to the MGH clinical lab for analysis by the current standard, immunoassays. The predicted tacrolimus concentration found in saliva was compared to the blood trough level results. 62 samples from 31 different patients were obtained. The male to female ratio and ethnicity distribution were well balanced. The majority of patients were within 30 days of initiating tacrolimus treatment. After IDM calibration and exclusion, 21 samples were measured by the IDM. Using an exponential function fit, the IDM showed a correlation of R2 = 0.39 between the saliva Test Line absorption and the measured tacrolimus concentration in blood, with an average absolute error of 1.8 ng/mL. Our results demonstrate a clear correlation between blood and saliva measurements. The IDM provided promising results to monitor immunosuppressant drug concentrations in patients after transplantation. Future larger studies will further develop the correlation, and the IDM's potential impact on patient outcomes.
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Affiliation(s)
- Laura Charlès
- Vascularized Composite Allotransplantation Laboratory, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
| | - Elise Lupon
- Vascularized Composite Allotransplantation Laboratory, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Department of Plastic and Reconstructive Surgery, Institut Universitaire Locomoteur et du Sport, Pasteur 2 Hospital, University Côte d'Azur, Nice, France; Department of Plastic and Reconstructive Surgery, Massachusetts General Hospital, Boston, MA, USA
| | - Tia Sheth
- Vascularized Composite Allotransplantation Laboratory, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Olivier Camuzard
- Department of Plastic and Reconstructive Surgery, Institut Universitaire Locomoteur et du Sport, Pasteur 2 Hospital, University Côte d'Azur, Nice, France.
| | - Alexandre G Lellouch
- Vascularized Composite Allotransplantation Laboratory, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Department of Plastic and Reconstructive Surgery, Massachusetts General Hospital, Boston, MA, USA; Innovative Therapies in Haemostasis, INSERM UMR-S 1140, University of Paris, Paris F-75006, France.
| | - Chetan Shende
- Real-Time Analyzers Inc., 362 Industrial Park Road, Unit 8, Middletown, CT 06457, USA.
| | - Stuart Farquharson
- Real-Time Analyzers Inc., 362 Industrial Park Road, Unit 8, Middletown, CT 06457, USA.
| | - Kassem Safa
- Division of Nephrology & Transplant Center, Massachusetts General Hospital, Boston, MA, USA.
| | - Curtis L Cetrulo
- Vascularized Composite Allotransplantation Laboratory, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Department of Plastic and Reconstructive Surgery, Massachusetts General Hospital, Boston, MA, USA.
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Munjal RS, Munjal J, Dhillon G, Buddhavarapu VS, Grewal H, Sharma P, Verma RK, Lee R, Kashyap R. Dialyzing a Brain-Dead Individual for Organ Procurement. Cureus 2024; 16:e56960. [PMID: 38665738 PMCID: PMC11044104 DOI: 10.7759/cureus.56960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Accepted: 03/26/2024] [Indexed: 04/28/2024] Open
Abstract
Many patients are unable to receive organ transplantation as there is an expanding gap between the number of patients waiting for an organ and the number who receive it. Organ procurement from the brain-dead can address this expanding gap, especially because one brain-dead patient can potentially donate multiple organs to several recipients. Here, we describe a rare case of a previously healthy 26-year-old male who was declared brain dead after a motor vehicle accident but underwent hemodialysis to treat his acute kidney injury and hyperkalemia before successfully donating his heart and left kidney.
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Affiliation(s)
| | - Jaskaran Munjal
- Internal Medicine, Shri Ram Murti Smarak Institute of Medical Sciences, Bareilly, IND
| | - Gagandeep Dhillon
- Internal Medicine, University of Maryland Medical Center, Glen Burnie, USA
| | | | - Harpreet Grewal
- Radiology, Florida State University College of Medicine, Pensacola, USA
| | - Pranjal Sharma
- Clinical Research, Global Remote Research Scholars Program, St Paul, USA
- Nephrology, Premier Renal Care Associates, Cuyahoga Falls, USA
- Internal Medicine/Nephrology, Northeast Ohio Medical University, Rootstown, USA
| | - Ram K Verma
- Sleep Medicine, Parkview Health System, Fort Wayne, USA
| | - Ruth Lee
- Nephrology, University of California, Davis, Davis, USA
| | - Rahul Kashyap
- Research, Global Remote Research Scholars Program, St Paul, USA
- Research, WellSpan Health, York, USA
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Fox DE, Hall M, Thibodeau C, Coldwell K, Lauder L, Dewell SL, Davidson SJ. The experiences of patients, caregivers and donors on transplant journeys in Canada: A convergent parallel mixed methods study. J Eval Clin Pract 2024; 30:268-280. [PMID: 38037502 DOI: 10.1111/jep.13942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 10/06/2023] [Accepted: 10/26/2023] [Indexed: 12/02/2023]
Abstract
INTRODUCTION The organ donation and transplantation (ODT) system in Canada is complex and can be challenging for individuals to navigate. We thus aimed to illuminate the experiences of individuals on transplant journeys using a patient-oriented convergent parallel mixed-methods approach. METHODS We captured data on adult patients, living donors, and caregivers on transplant journeys across Canada through an online survey (n = 935) and focus groups (n = 21). The survey was comprised of 48 questions about the individuals' experiences with the living donation and transplantation system, which were analyzed descriptively. Qualitative data were analyzed using an inductive conventional content analysis approach. RESULTS Most participants were female (70.1%), English speaking (92.6%) and White (87.8%). Participants' experiences were represented across six key themes: holistic person-centred care, accountable care, collective impact, navigating uncertainty, connection and advocacy. Quantitative and qualitative data were integrated to identify five opportunities to improve the organ donation and transplantation system in Canada: enhancing mental health support, establishing formal peer support programmes, improving continuity of care, improving knowledge acquisition, and expanding resources and support. CONCLUSION It is imperative that the ODT system commits to asking, listening, and learning from individuals on transplant journeys and to provide them opportunities to help improve it.
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Affiliation(s)
- Danielle E Fox
- Department of Community Health Sciences, The University of Calgary, Calgary, Alberta, Canada
| | - Marc Hall
- Faculty of Nursing, The University of Calgary, Calgary, Alberta, Canada
| | | | - Kristi Coldwell
- Transplant Research Foundation of British Columbia, Vancouver, British Columbia, Canada
| | - Lydia Lauder
- The Kidney Foundation of Canada, Montreal, Québec, Canada
| | - Sarah L Dewell
- School of Nursing, Thompson Rivers University, Kamloops, British Columbia, Canada
| | - Sandra J Davidson
- Faculty of Nursing, The University of Calgary, Calgary, Alberta, Canada
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Jardou M, Brossier C, Marquet P, Picard N, Druilhe A, Lawson R. Solid organ transplantation and gut microbiota: a review of the potential immunomodulatory properties of short-chain fatty acids in graft maintenance. Front Cell Infect Microbiol 2024; 14:1342354. [PMID: 38476165 PMCID: PMC10927761 DOI: 10.3389/fcimb.2024.1342354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 02/16/2024] [Indexed: 03/14/2024] Open
Abstract
Transplantation is the treatment of choice for several end-stage organ defects: it considerably improves patient survival and quality of life. However, post-transplant recipients may experience episodes of rejection that can favor or ultimately lead to graft loss. Graft maintenance requires a complex and life-long immunosuppressive treatment. Different immunosuppressive drugs (i.e., calcineurin inhibitors, glucocorticoids, biological immunosuppressive agents, mammalian target of rapamycin inhibitors, and antiproliferative or antimetabolic agents) are used in combination to mitigate the immune response against the allograft. Unfortunately, the use of these antirejection agents may lead to opportunistic infections, metabolic (e.g., post-transplant diabetes mellitus) or cardiovascular (e.g., arterial hypertension) disorders, cancer (e.g., non-Hodgkin lymphoma) and other adverse effects. Lately, immunosuppressive drugs have also been associated with gut microbiome alterations, known as dysbiosis, and were shown to affect gut microbiota-derived short-chain fatty acids (SCFA) production. SCFA play a key immunomodulatory role in physiological conditions, and their impairment in transplant patients could partly counterbalance the effect of immunosuppressive drugs leading to the activation of deleterious pathways and graft rejection. In this review, we will first present an overview of the mechanisms of graft rejection that are prevented by the immunosuppressive protocol. Next, we will explain the dynamic changes of the gut microbiota during transplantation, focusing on SCFA. Finally, we will describe the known functions of SCFA in regulating immune-inflammatory reactions and discuss the impact of SCFA impairment in immunosuppressive drug treated patients.
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Affiliation(s)
| | | | | | | | | | - Roland Lawson
- National Institute of Health and Medical Research (FRANCE) (INSERM), Univ. Limoges, Pharmacology & Transplantation, U1248, Limoges, France
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Navarro A, Len O, Muñiz-Diaz E, Vives Corrons JL, Dominguez-Gil B, Vilarrodona A, Tort J. The value of organ and tissue biovigilance: a cross-sectional analysis. FRONTIERS IN TRANSPLANTATION 2024; 3:1307946. [PMID: 38993767 PMCID: PMC11235277 DOI: 10.3389/frtra.2024.1307946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 01/15/2024] [Indexed: 07/13/2024]
Abstract
Introduction Biovigilance (BV) systems aim to improve the quality and safety of tissues and organs for transplantation. This study describes the Catalan BV system and analyzes its utility. Methods It is a retrospective analysis of notifications on serious adverse events (SAEs) and reactions (SARs) since the implementation of the BV system (2008 for tissues and 2016 for organs) until 2020. Variables are presented to describe the most common critical steps of the pathway and complications associated with the quality and safety of tissues and organs. Results A total of 154 and 125 notifications were reported to the Tissue and the Organ BV systems, respectively. Most SAEs were related to unexpected donor diseases and implemented actions were assured on those deemed preventable. Regarding SARs, donor-transmitted infections and malignancies (only organs) were the most common, followed by graft failure (tissues) and process-related (organs). The incidence of SAEs and SARs related to tissue was 3.44‰ and 0.22‰, respectively. The corresponding figures for organs were 31.48‰ and 8.8‰, respectively. Discussion The analysis of the notifications to the Catalan BV systems has provided useful information about existing risks associated with the quality and safety of tissues and organs, and enabled the implementation of actions targeted to diminish risks and mitigate damage.
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Affiliation(s)
- Aurora Navarro
- Oganització Catalana de Trasplantaments (OCATT), Barcelona, Spain
- Associate teacher, University of Barcelona, Barcelona, Spain
| | - Oscar Len
- Infectious Diseases Department, Hospital Universitari Vall d'Hebron, Barcelona, Spain
- Department of Medicine, Universitat Autònoma de Barcelona (UAB), Barcelona, Spain
| | | | | | | | - Anna Vilarrodona
- Barcelona Tissue Bank, Banc de Sang i Teixits, Barcelona, Spain
- Vall d'Hebron Institute of Research (VHIR), Barcelona, Spain
| | - Jaume Tort
- Oganització Catalana de Trasplantaments (OCATT), Barcelona, Spain
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Jalali S, Stankovic S, Westall GP, Reading PC, Sullivan LC, Brooks AG. Examining the impact of immunosuppressive drugs on antibody-dependent cellular cytotoxicity (ADCC) of human peripheral blood natural killer (NK) cells and gamma delta (γδ) T cells. Transpl Immunol 2024; 82:101962. [PMID: 38007172 DOI: 10.1016/j.trim.2023.101962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 11/20/2023] [Accepted: 11/20/2023] [Indexed: 11/27/2023]
Abstract
BACKGROUND Human natural killer (NK) cells and gamma delta (γδ) T cells may impact outcomes of solid organ transplantation (SOT) such as lung transplantation (LTx) following the differential engagement of an array of activating and inhibitory receptors. Amongst these, CD16 may be particularly important due to its capacity to bind IgG to trigger antibody-dependent cellular cytotoxicity (ADCC) and the production of proinflammatory cytokines. While the use of immunosuppressive drugs (ISDs) is an integral component of SOT practice, their relative impact on various immune cells, especially γδT cells and CD16-induced functional responses, is still unclear. METHODS The ADCC responses of peripheral blood NK cells and γδT cells from both healthy blood donors and adult lung transplant recipients (LTRs) were assessed by flow cytometry. Specifically, the degranulation response, as reflected in the expression of CD107a, and the capacity of both NK cells and γδT cells to produce IFN-γ and TNF-α was assessed following rituximab (RTX)-induced activation. Additionally, the effect of cyclosporine A (CsA), tacrolimus (TAC), prednisolone (Prdl) and azathioprine (AZA) at the concentration of 1 ng/ml, 10 ng/ml, 100 ng/ml, and 1000 ng/ml on these responses was also compared in both cell types. RESULTS Flow cytometric analyses of CD16 expresion showed that its expression on γδT cells was both at lower levels and more variable than that on peripheral blood NK cells. Nevertheless functional analyses showed that despite these differences, γδT cells like NK cells can be readily activated by engagement with RTX to degranulate and produce cytokines such as IFNg and TNF-a. RTX-induced degranulation by either NK cells or γδT cells from healthy donors was not impacted by co-culture with individual ISDs. However, CsA and TAC but not Prdl and AZA did inhibit the production of IFN-γ and TNF-α by both cell types. Flow cytometric analyses of RTX-induced activation of NK cells and γδT cells from LTRs suggested their capacity to degranulate was not markedly impacted by transplantation with similar levels of cells expressing CD107 pre- and post-LTx. However an impairment in the ability of NK cells to produce cytokines was observed in samples obtained post LTx whereas γδT cell cytokine responses were not significantly impacted. CONCLUSIONS In conclusion, the findings show that despite differences in the expression levels of CD16, γδT cells like NK cells can be readily activated by engagement with RTX and that in vitro exposure to CsA and TAC (calcineurin inhibitors) had a measurable effect on cytokine production but not degranulation by both NK cells and gdT cells from healthy donors. Finally the observation that in PBMC obtained from LTx recipients, NK cells but not γδT cells exhibited impaired cytokine reponses suggests that transplantation or chronic exposure to ISDs differentially impacts their potential to respond to the introduction of an allograft and/or transplant-associated infections.
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Affiliation(s)
- Sedigheh Jalali
- Murdoch Children's Research Institute, The Royal Children's Hospital, Parkville, Victoria 3052, Australia; Department of Paediatrics, University of Melbourne, Parkville, Victoria 3010, Australia; Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute, Parkville, Victoria 3010, Australia
| | - Sanda Stankovic
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute, Parkville, Victoria 3010, Australia
| | - Glen P Westall
- Lung Transplant Service, The Alfred Hospital and Monash University, Melbourne, Victoria 3000, Australia
| | - Patrick C Reading
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute, Parkville, Victoria 3010, Australia
| | - Lucy C Sullivan
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute, Parkville, Victoria 3010, Australia
| | - Andrew G Brooks
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute, Parkville, Victoria 3010, Australia.
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12
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Sipma WS, de Jong MFC, Ahaus KCTB. "It's My Life and It's Now or Never"-Transplant Recipients Empowered From a Service-Dominant Logic Perspective. Transpl Int 2023; 36:12011. [PMID: 38188696 PMCID: PMC10766819 DOI: 10.3389/ti.2023.12011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 12/14/2023] [Indexed: 01/09/2024]
Abstract
Patient well-being after an organ transplant is a major outcome determinant and survival of the graft is crucial. Before surgery, patients are already informed about how they can influence their prognosis, for example by adhering to treatment advice and remaining active. Overall, effective selfmanagement of health-related issues is a major factor in successful long-term graft survival. As such, organ transplant recipients can be considered as co-producers of their own health status. However, although keeping the graft in good condition is an important factor in the patient's well-being, it is not enough. To have a meaningful life after a solid organ transplant, patients can use their improved health status to once again enjoy time with family and friends, to travel and to return to work -in short to get back on track. Our assertion in this article is twofold. First, healthcare providers should look beyond medical support in enhancing long-term well-being. Second, organ recipients should see themselves as creators of their own well-being. To justify our argument, we use the theoretical perspective of service-dominant logic that states that patients are the true creators of real value-in-use. Or as Bon Jovi sings, "It's my life and it's now or never."
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Affiliation(s)
- Wim S. Sipma
- Department of Health Services Management & Organisation, Erasmus School of Health Policy & Management, Erasmus University Rotterdam, Rotterdam, Netherlands
| | | | - Kees C. T. B. Ahaus
- Department of Health Services Management & Organisation, Erasmus School of Health Policy & Management, Erasmus University Rotterdam, Rotterdam, Netherlands
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13
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Fox D, Hall M, Thibodeau C, Coldwell K, Lauder L, Dewell S, Davidson S. Impact of the COVID-19 pandemic on Canadian transplant journeys: a mixed methods study. BMJ Open 2023; 13:e068347. [PMID: 38040429 PMCID: PMC10693860 DOI: 10.1136/bmjopen-2022-068347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 11/20/2023] [Indexed: 12/03/2023] Open
Abstract
BACKGROUND Navigating the organ donation and transplantation system in Canada can be challenging for individuals on transplant journeys. Although it is likely that the COVID-19 pandemic has further contributed to these challenges, the experiences of individuals during the pandemic in Canada have not been well elicited. OBJECTIVE To illuminate how the COVID-19 pandemic has impacted individuals on transplant journeys in Canada. DESIGN Convergent parallel mixed-methods study. SETTING Canada. PARTICIPANTS Adult patients, caregivers, and donors on transplant journeys across Canada. DATA COLLECTION Eight focus groups and an online survey between May and November 2021. Focus group transcripts were analysed using an inductive conventional content analysis approach. Survey data were analysed using descriptive statistics. The study was guided by individuals with lived experience of organ donation and transplantation. RESULTS A total of 830 participants completed three COVID-19 related survey questions, with 21 participating in the focus groups. Survey results: over 50% of patients and caregivers reported that the pandemic impacted their access to their healthcare team, their mental health (60% and 65%, respectively) and their comfort going out in public (80% and 75%, respectively). Although many donors reported several factors that impacted their transplant journey, the impact appeared to be greater for patients and caregivers. Qualitative results: three themes emerged from the qualitative data that contextualise participant's experiences: compounding isolation, disruption amid uncertainty and unforeseen benefits. CONCLUSION The COVID-19 pandemic has exacerbated many of the challenges that individuals on transplant journeys experience. It will be critical for transplant programmes to consider these factors in future care provision.
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Affiliation(s)
- Danielle Fox
- Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Marc Hall
- Faculty of Nursing, University of Calgary, Calgary, Alberta, Canada
| | | | - Kristi Coldwell
- Transplant Research Foundation of British Columbia, Vancouver, British Columbia, Canada
| | - Lydia Lauder
- Kidney Foundation of Canada, Montreal, Québec, Canada
| | - Sarah Dewell
- School of Nursing, Thompson Rivers University, Kamloops, British Columbia, Canada
| | - Sandra Davidson
- Faculty of Nursing, University of Calgary, Calgary, Alberta, Canada
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14
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Sambaza SS, Naicker N. Contribution of wastewater to antimicrobial resistance: A review article. J Glob Antimicrob Resist 2023; 34:23-29. [PMID: 37285914 DOI: 10.1016/j.jgar.2023.05.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 03/15/2023] [Accepted: 05/22/2023] [Indexed: 06/09/2023] Open
Abstract
OBJECTIVES Antimicrobial resistance (AMR) is a global challenge that has raised concern globally, owing to its detrimental effects on the health and economy of countries. The ever-growing threat of AMR and sources of AMR are still being investigated. Wastewater plays an important role as a habitat for bacteria and an environment conducive to gene transfer. The primary aim of this review was to highlight the contribution of wastewater to AMR. METHODS Evidence of AMR in wastewater was drawn from literature published in the last 10 years, from 2012 to 2022. RESULTS Wastewater from agricultural practices, pharmaceutical manufacturing plants, and hospital effluents was established to promote AMR. Furthermore, stress factors such as the presence of antibiotics, heavy metals, pH, and temperature initiate and propagate AMR in bacteria living in wastewater. AMR in bacteria from wastewater was established to be either natural or acquired. Wastewater treatment techniques such as membrane filtration, coagulation, adsorption, and advanced oxidation processes have been used to remove resistant bacteria with varying success levels. CONCLUSION Wastewater is a major contributor to AMR, and an understanding of its role in AMR is necessary to find a lasting solution. In this regard, the spread of AMR in wastewater should be considered a threat that requires a strategy to stop further damage.
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Affiliation(s)
| | - Nisha Naicker
- Department of Environmental Health, University of Johannesburg, Johannesburg, South Africa; Epidemiology and Surveillance, National Institute for Occupational Health, National Health Laboratory Services, Braamfontein, South Africa
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15
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Dery KJ, Yao S, Cheng B, Kupiec-Weglinski JW. New therapeutic concepts against ischemia-reperfusion injury in organ transplantation. Expert Rev Clin Immunol 2023; 19:1205-1224. [PMID: 37489289 PMCID: PMC10529400 DOI: 10.1080/1744666x.2023.2240516] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 07/20/2023] [Indexed: 07/26/2023]
Abstract
INTRODUCTION Ischemia-reperfusion injury (IRI) involves a positive amplification feedback loop that stimulates innate immune-driven tissue damage associated with organ procurement from deceased donors and during transplantation surgery. As our appreciation of its basic immune mechanisms has improved in recent years, translating putative biomarkers into therapeutic interventions in clinical transplantation remains challenging. AREAS COVERED This review presents advances in translational/clinical studies targeting immune responses to reactive oxygen species in IRI-stressed solid organ transplants, especially livers. Here we focus on novel concepts to rejuvenate suboptimal donor organs and improve transplant function using pharmacologic and machine perfusion (MP) strategies. Cellular damage induced by cold ischemia/warm reperfusion and the latest mechanistic insights into the microenvironment's role that leads to reperfusion-induced sterile inflammation is critically discussed. EXPERT OPINION Efforts to improve clinical outcomes and increase the donor organ pool will depend on improving donor management and our better appreciation of the complex mechanisms encompassing organ IRI that govern the innate-adaptive immune interface triggered in the peritransplant period and subsequent allo-Ag challenge. Computational techniques and deep machine learning incorporating the vast cellular and molecular mechanisms will predict which peri-transplant signals and immune interactions are essential for improving access to the long-term function of life-saving transplants.
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Affiliation(s)
- Kenneth J. Dery
- The Dumont-UCLA Transplantation Center, Department of Surgery, Division of Liver and Pancreas Transplantation; David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Siyuan Yao
- The Dumont-UCLA Transplantation Center, Department of Surgery, Division of Liver and Pancreas Transplantation; David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Brian Cheng
- The Dumont-UCLA Transplantation Center, Department of Surgery, Division of Liver and Pancreas Transplantation; David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Jerzy W. Kupiec-Weglinski
- The Dumont-UCLA Transplantation Center, Department of Surgery, Division of Liver and Pancreas Transplantation; David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
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16
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Fenton D, Diaz A, Nordgren R, Lysandrou M, Dolan D, Jablonski R, Tsui K, Song T, Madariaga MLL. Factors Associated with Health-Related Quality of Life in Lung Transplant Candidates and Recipients. EXP CLIN TRANSPLANT 2023; 21:592-598. [PMID: 37584540 DOI: 10.6002/ect.2023.0089] [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: 08/17/2023]
Abstract
OBJECTIVES Health-related quality of life has been well studied across transplantation fields, but factors associated with lung transplant preoperative and postoperative quality of life remain unknown. Here, we determine factors associated with health-related quality of life in lung transplant candidates and recipients to identify patients at risk of lower health-related quality of life. MATERIALS AND METHODS From January 2021 to May 2022, health-related quality of life was measured in candidates and recipients using the RAND 36-Item Short Form Health Survey questionnaire. We reviewed demographic parameters and clinical information and scored frailty according to the modified 5-item frailty index. We performed Fisher exact test and the Pearson chi-square test and used linear regression models to determine covariate associations on physical component summary, mental component summary, and self-reported health scores (α = 0.05). RESULTS Eleven candidates and 17 recipients comp-leted the survey. Compared with candidates, transplant recipients reported significantly higher scores in 4 of the 8 health domains and in the physical component summary (P < .01), mental component summary (P = .05), and self-reported health score (P < .01). In candidates, higher body mass index and higher modified 5-item frailty index scores were negatively associated with the physical component summary and mental component summary, respec-tively (P < .05). In recipients, higher body mass index and higher lung allocation scores were associated with lower values for the physical component summary (-2.29; P < .05) and self-reported health score (-0.33; P < .05), respectively. CONCLUSIONS Body mass index, the modified 5-item frailty index, and the lung allocation score were significantly associated with health-related quality of life in lung transplant recipients. Future interventions should target these modifiable associations to maximize candidate and recipient health-related quality of life.
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Affiliation(s)
- David Fenton
- From the Pritzker School of Medicine, University of Chicago, USA
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17
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Cherukuri A, Rothstein DM. Regulatory and transitional B cells: potential biomarkers and therapeutic targets in organ transplantation. Curr Opin Organ Transplant 2022; 27:385-391. [PMID: 35950881 PMCID: PMC9474638 DOI: 10.1097/mot.0000000000001010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
PURPOSE OF THE REVIEW Regulatory B cells (Bregs) play a prominent role in various disease settings. While progress has been hindered by the lack of a specific Breg marker, new findings highlight their role modulating the alloimmune response and promoting allograft survival. RECENT FINDINGS Herein, we focus on the recent advances in Breg biology and their role in transplantation. We review studies showing that T-cell immunoglobulin and mucin domain 1 (TIM-1) is an inclusive and functional Breg marker in mice that may have human relevance. We highlight the utility of the B cell interleukin-10/tumor necrosis factor-alpha (IL-10/TNFα) ratio in identifying underlying immunological reactivity and predicting clinical outcomes in kidney transplantation. This may identify patients requiring more immunosuppression and provide insight into potential therapeutic approaches that can modulate the Breg: B effector cell (Beff) balance. SUMMARY Emerging data support Bregs as potent modulators of immune responses in humans. Their ability to promote allograft survival must await development of approaches to expand Bregs in vitro/in vivo . The low IL-10/TNFα ratio reflecting decreased Breg/Beff balance, predicts acute rejection (AR) and poorer outcomes in renal transplantation. It remains to be determined whether this paradigm can be extended to other allografts and whether therapy aiming to correct the relative deficiency of Bregs will improve outcomes.
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Affiliation(s)
- Aravind Cherukuri
- Thomas E Starzl Transplantation Institute, University of Pittsburgh, Pittsburgh, PA, USA
- Renal and Electrolyte Division, Department of Medicine, University of Pittsburgh, PA, USA
| | - David M. Rothstein
- Thomas E Starzl Transplantation Institute, University of Pittsburgh, Pittsburgh, PA, USA
- Renal and Electrolyte Division, Department of Medicine, University of Pittsburgh, PA, USA
- Department of Immunology, University of Pittsburgh, PA, USA
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18
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Kumar M, Ram Dhayal I. Observational Study of Early Outcomes in Single-Vessel and Multiple-Vessel Renal Allograft. Cureus 2022; 14:e27579. [PMID: 36059293 PMCID: PMC9428421 DOI: 10.7759/cureus.27579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/17/2022] [Indexed: 11/05/2022] Open
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19
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Israeli Medical Experts’ Knowledge, Attitudes, and Preferences in Allocating Donor Organs for Transplantation. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19116945. [PMID: 35682530 PMCID: PMC9180581 DOI: 10.3390/ijerph19116945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 06/02/2022] [Accepted: 06/03/2022] [Indexed: 11/16/2022]
Abstract
Medical advancement has increased the confidence in successful organ transplants in end-stage patients. As the waitlist of organ demand is multiplying, the organ allocation process is becoming more crucial. In this situation, a transparent and efficient organ allocation policy is required. This study evaluates the preferences of medical experts to substantial factors for allocating organs in different hypothetical scenarios. Twenty-five medical professionals with a significant role in organ allocation were interviewed individually. The interview questionnaire comprised demographic information, organ donation status, important organ allocation factors, public preference knowledge, and experts’ preferences in different hypothetical scenarios. Most medical experts rated the waiting time and prognosis as the most important, while the next of kin donor status and care and contribution to the well-being of others were the least important factors for organ allocation. In expert opinion, medical experts significantly considered public preferences for organ allocation in making their decisions. Altogether, experts prioritized waiting time over successful transplant, age, and donor status in the hypothetical scenarios. In parallel, less chance of finding another organ, donor status, and successful transplant were prioritized over age. Medical experts are the key stakeholders; therefore, their opinions are substantial in formulating an organ allocation policy.
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20
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Akbulut S, Demyati K, Toman I, Gaygili Z, Kaya S, Akpolat VR, Cing A, Keles TY, Saritas H, Unsal S, Ozer A. Medical students' knowledge, attitudes and awareness toward organ donation. Transpl Immunol 2022; 73:101634. [PMID: 35623595 DOI: 10.1016/j.trim.2022.101634] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 05/05/2022] [Accepted: 05/20/2022] [Indexed: 11/28/2022]
Abstract
OBJECTIVE This survey study aimed to evaluate medical students' attitudes, knowledge, and awareness toward organ donation. METHODS For this questionnaire-based cross-sectional study, 1000 medical students were interviewed, out of which 950 students agreed to participate in the study and were enrolled. A questionnaire form consisting of 29 questions was used to determine the students' socio-demographic characteristics and rate their knowledge, attitudes, and behaviors about organ donation. RESULTS While 95.5% (n = 907) of the students stated that they had not donated organs, 41.1% stated that they had not yet decided to donate organs, and 59.7% stated that they had no specific reason for them not donating organs. Out of the participants, 68.1% stated that organ donation complies with the Islamic rules; 40.7% stated that the Directorate of Religious Affairs issued a fatwa on organ donation, and 39.4% stated that there are legal regulations on organ donation in the country. While 22.1% of the students stated that a person with brain death could come back to life, 19.7% stated that they did not know about this issue. The students who had donated organs and who did not show significant differences regarding the answers given to the questions about whether organ donation complies with religious rules (p < 0.001), where one must apply to donate organs (p = 0.032), the will to donate the organs of a relative with brain death (p = 0.004), and whether preaching in mosques and foundations is needed to increase organ donation rates (p = 0.042). Although there was a correlation between the students' grade and their attitude and knowledge about organ donation, this correlation was weak and showed no parallelism with increasing grades. CONCLUSION This study indicates that medical students have inadequate knowledge, attitudes, and behaviors about organ donation. In our opinion, it is of paramount importance to provide physician candidates, who should set an example for society, with periodic training on organ donation throughout their academic life in shaping the national organ donation policy in the future.
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Affiliation(s)
- Sami Akbulut
- Department of Surgery and Liver Transplant Institute, Inonu University Faculty of Medicine, 44280 Malatya, Turkey.
| | - Khaled Demyati
- Department of Surgery, An-Najah National University Hospital, An-Najah National University, Nablus, Palestine
| | - Irem Toman
- Medical Students, Inonu University, Faculty of Medicine, 44280 Malatya, Turkey
| | - Zeynep Gaygili
- Medical Students, Inonu University, Faculty of Medicine, 44280 Malatya, Turkey
| | - Semih Kaya
- Medical Students, Inonu University, Faculty of Medicine, 44280 Malatya, Turkey
| | - Vildan Rana Akpolat
- Medical Students, Inonu University, Faculty of Medicine, 44280 Malatya, Turkey
| | - Ayla Cing
- Medical Students, Inonu University, Faculty of Medicine, 44280 Malatya, Turkey
| | - Taha Yasin Keles
- Medical Students, Inonu University, Faculty of Medicine, 44280 Malatya, Turkey
| | - Hasan Saritas
- Department of Surgical Nursing, Inonu University Faculty of Nursing, 44280 Malatya, Turkey
| | - Selver Unsal
- Department of Nursing Service, Inonu University Faculty of Medicine, 44280 Malatya, Turkey
| | - Ali Ozer
- Department of Public Health, Inonu University, Faculty of Medicine, 44280 Malatya, Turkey
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21
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Management of COVID-19 patients with chronic liver diseases and liver transplants. Ann Hepatol 2022; 27:100653. [PMID: 34929350 PMCID: PMC8683212 DOI: 10.1016/j.aohep.2021.100653] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 12/02/2021] [Accepted: 12/03/2021] [Indexed: 02/04/2023]
Abstract
The epidemic of coronavirus disease 2019 (COVID-19), caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has increasingly attracted worldwide concern. Liver damage or dysfunction occurred in patients with COVID-19 (mainly characterized by moderately elevated serum aspartate aminotransferase levels). However, it is not yet clear whether the COVID-19-related liver injury is mainly caused by the virus infection, potentially hepatotoxic drugs, or other coexisting conditions. Progression of pre-existing chronic liver disease (CLD) may be the underlying mechanism of liver injury. Although COVID-19 patients with CLD, such as nonalcoholic fatty liver disease, liver cirrhosis, and liver cancer, have been deemed at increased risk for serious illness in many studies, little is known about the impact of CLD on the natural history and outcome of COVID-19 patients. Thereby, based on the latest evidence from case reports and case series, this paper discusses the clinical manifestations, treatment, prognosis, and management of the COVID-19 patients with different CLD. This article also reviews the effect of COVID-19 on liver transplantation patients (LT), hoping to work for future prevention, management, and control measures of COVID-19. However, due to the lack of relevant research, most of them are still limited to the theoretical stage, further study of COVID-19 and CLD needs to be improved in the future.
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22
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McLaren-Hedwards T, Hickman IJ, Campbell KL, Macdonald GA, Mayr HL. A Qualitative Study of Clinician Barriers and Enablers to Implementing the Mediterranean Dietary Pattern with Kidney and Liver Transplant Recipients. Prog Transplant 2021; 31:337-344. [PMID: 34726088 DOI: 10.1177/15269248211046001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
INTRODUCTION Solid organ transplant recipients experience greater cardiometabolic risk than the general population. Following a Mediterranean dietary pattern has been shown to reduce cardiometabolic risk. This study aimed to assess multidisciplinary clinician perspectives of routine nutrition care for kidney and liver transplant recipients and barriers and enablers to implementation of the Mediterranean dietary pattern. METHODS Semi-structured individual interviews were conducted with clinicians in a metropolitan health service at tertiary/quaternary transplant centres involved in longer-term management of kidney and liver transplants recipients. Audio-recorded interviews were transcribed verbatim and analysed using thematic content analysis. FINDINGS Nineteen clinicians (9 medical officers, 5 dietitians, 3 nurses and 2 other allied health professionals) were interviewed. Four themes with 11 subthemes were identified: the Mediterranean dietary pattern is not part of routine care (there are competing clinical priorities; healthy eating principles aligned with but not the full dietary pattern are recommended); variation in knowledge and acceptance of this dietary approach (variances in information sources and degree of knowledge of Mediterranean dietary pattern clinical evidence); nutrition advice is influenced by service delivery and culture (there is lack of consistent nutrition advice; limited consultation time; and reliance on existing patient education resources); and patient-centred care influences decisions on nutrition advice (clinicians do not know how to recommend this dietary pattern in a patient-centred manner). DISCUSSION The Mediterranean dietary pattern is not considered part of routine post-transplant nutrition care. To be implemented in these services intervention strategies which address the identified barriers and potential enablers need to be considered.
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Affiliation(s)
- Taya McLaren-Hedwards
- School of Human Movement and Nutrition Sciences, 1974the University of Queensland, Brisbane, Australia
| | - Ingrid J Hickman
- Department of Nutrition and Dietetics, 1966Princess Alexandra Hospital, Brisbane, Australia.,420004Faculty of Medicine, the University of Queensland, Brisbane, Australia
| | - Katrina L Campbell
- Department of Nutrition and Dietetics, 1966Princess Alexandra Hospital, Brisbane, Australia.,420004Faculty of Medicine, the University of Queensland, Brisbane, Australia
| | - Graeme A Macdonald
- 420004Faculty of Medicine, the University of Queensland, Brisbane, Australia.,Department of Gastroenterology and Hepatology, 1966Princess Alexandra Hospital, Brisbane, Australia
| | - Hannah L Mayr
- Department of Nutrition and Dietetics, 1966Princess Alexandra Hospital, Brisbane, Australia.,420004Faculty of Medicine, the University of Queensland, Brisbane, Australia
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23
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Andreasen PB, Rezahosseini O, Møller DL, Wareham NE, Thomsen MT, Houmami R, Knudsen AD, Knudsen J, Kurtzhals JAL, Rostved AA, Pedersen CR, Rasmussen A, Nielsen SD. Pneumocystis jirovecii pneumonia in liver transplant recipients in an era of routine prophylaxis. IMMUNITY INFLAMMATION AND DISEASE 2021; 10:93-100. [PMID: 34713963 PMCID: PMC8669693 DOI: 10.1002/iid3.546] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/22/2021] [Accepted: 09/30/2021] [Indexed: 12/11/2022]
Abstract
BACKGROUND Pneumocystis jirovecii pneumonia (PCP) is an opportunistic infection in organ transplant recipients that may be prevented by antibiotic prophylaxis. We aimed to investigate the incidence rate (IR) of PCP and the related hospitalization and mortality rates in liver transplant recipients in an era of routine prophylaxis. METHODS We included all adult liver transplant recipients transplanted at Rigshospitalet between January 1, 2011 and October 1, 2019. Microbiology data were obtained from the Danish Microbiology Database (MiBa), a national database containing all data from all Departments of Clinical Microbiology in Denmark receiving samples from both hospitals and general practices. According to local guidelines, PCP prophylaxis was initiated 1 week posttransplantation and discontinued after 6 months or sooner in patients experiencing side effects. RESULTS We included 343 liver transplant recipients with 1153 person-years of follow-up (PYFU), of which 269 (78%) received PCP prophylaxis during the first 6 months posttransplantation. Seven (2%) recipients were diagnosed with PCP during follow-up. In the first 6 months posttransplantation and in 269 transplant recipients who received prophylaxis there were zero PCP events while the IR was 32 (95% confidence interval [CI] 2.9-148) per 1000 PYFU in 74 recipient who did not receive prophylaxis. During 7th to 12th month posttransplantation the IR was 20 (95% CI: 5.5-53) per 1000 PYFU. All seven (100%) recipients diagnosed with PCP were hospitalized, however none died. CONCLUSIONS PCP was not detected in liver transplant recipients while on prophylaxis. Though, it worth mentioning that two out of the seven PCP patients received high-dose prednisolone before the PCP event. All liver transplant recipients with PCP were hospitalized, but none died. Randomized clinical trials to determine the optimal duration of prophylaxis are warranted.
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Affiliation(s)
- Philip B Andreasen
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Omid Rezahosseini
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Dina L Møller
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Neval E Wareham
- Centre of Excellence for Personalized Medicine of Infectious Complications in Immune Deficiency, Rigshospitalet, Copenhagen, Denmark
| | - Magda T Thomsen
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Ranya Houmami
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Andreas D Knudsen
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.,Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Jenny Knudsen
- Department of Clinical Microbiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Jørgen A L Kurtzhals
- Department of Clinical Microbiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.,Centre for Medical Parasitology, Department of Immunology and Microbiology, University of Copenhagen, Copenhagen, Denmark
| | - Andreas A Rostved
- Department of Surgical Gastroenterology and Transplantation, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Christian R Pedersen
- Department of Surgical Gastroenterology and Transplantation, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Allan Rasmussen
- Department of Surgical Gastroenterology and Transplantation, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Susanne D Nielsen
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.,Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
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Prospective multi-centric study to analyze pre-transplant compatibility algorithm for live-related donor kidney transplant in Indian setting: the "Delhi approach"! Transpl Immunol 2021; 69:101487. [PMID: 34688882 DOI: 10.1016/j.trim.2021.101487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 10/16/2021] [Accepted: 10/16/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Since no single test is always accurate and sensitive, two or more tests are used to increase the precision of evaluation. Different algorithms have been proposed by centers in Leiden, Basel, Vienna and Minnesota, etc. With an intention to develop an optimal algorithm for India, we evaluated pre-transplant compatibility tests for live-donor kidney transplants. Three tests complement dependent cyto-toxicity cross-match (CDCXM), flow-cytometry cross-match (FCXM) and anti-HLA antibody screening (HAS) were performed and confirmed by the anti-HLA antibody identification (HAI) assay in a multi-centric trial (three transplant centers) in India. MATERIALS AND METHODS All prospective recipients (and their potential donors) underwent low-resolution HLA typing as well as CDCXM, FCXM and HAS assays. In addition, HAI {single antigen bead assay; (SAB)} was done for all recipients to identify possible anti-HLA antibodies. In a virtual cross-match (VXM), antibody specificity was mapped to donor HLA type to determine donor-specific antibodies (DSA). Only patients without DSA were cleared for the transplant. Alternatively, patients with DSA were offered an exchange in the kidney paired donation (KPD) program. The screening results (CDCXM, FCXM, and HAS) were analyzed, individually as well as in combination of screening assays (CDCXM+HAS, CDCXM+FCXM, and FCXM+HAS) and the results were compared with those from the HAI test. RESULTS Out of 100 patients, 69 were males and 31 were females; 85 recipients (85%) underwent a kidney transplant. The sensitivity of CDCXM was only 12.1% and the specificity of CDCXM was 100%; whereas the sensitivity of FCXM was 84.8% and the specificity of FCXM was 89.6%. The sensitivity and specificity of class I HAS was 88.2% and 84.3%, respectively. The sensitivity and specificity class II HAS was 88.0% and 80.0%, respectively. However, when both class I/II HAS were tested together the sensitivity increased to 97.0% and the specificity to 82.1%. Similarly, the sensitivity of combined FCXM+HAS had the sensitivity of 100% and the specificity of 76.1%; CDCXM+FCXM had the sensitivity of 84.8% and the specificity of 89.6% and CDCXM+HAS assays reached 97% with the specificity of 82.1%. CONCLUSIONS Our results showed that the algorithm of FCXM with HAS produced the best sensitivity of 100%. The specificity of 76.1% indicate that the combined FCXM+HAS assays may detect up to 24.9% false positive results. We suggest that these false-positives may be easily resolved by performing the virtual crossmatch based on HAI (SAB) results. In our reflex testing algorithmic approach only 49% patients needed HAI (SAB). Finally, our results suggested that the CDCXM assay may be discontinued in pre-transplant workup owing to its very low sensitivity (12.1%).
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Rosa V, Hazell M. Quantitation of residual D positive red cells in D negative recipients of D positive solid organ transplants. Transfus Med 2021; 31:488-493. [PMID: 34558743 DOI: 10.1111/tme.12819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 08/05/2021] [Accepted: 09/07/2021] [Indexed: 12/01/2022]
Abstract
BACKGROUND Solid organ transplants (SOT) from D positive donors are potentially sensitising events for D negative recipients. For this reason, it is important to quantify the presence of residual D positive red blood cells (RBCs) in the recipient's circulation and calculate the correct dose of prophylactic anti-D (PAD) required to prevent sensitisation. This is especially important in females of child-bearing potential where the presence of allo anti-D can, at worst, cause the death of the fetus in future pregnancies. OBJECTIVE This study aimed to identify the patient characteristics of D positive SOT cases referred to Red Cell Immunohaematology, NHSBT for flow cytometry investigation. This information could indicate improvements required in the current testing methodology, as well as to the calculations used to prescribe PAD for this patient group. METHODS Samples were investigated using a Beckman Coulter Navios Flow Cytometer using BRAD3-FITC (anti-D), AEVZ5.3-FITC (isotype matched negative control) and BIRMA17C-PE (granulocyte exclusion reagent). Mollison's calculation was used to estimate the dose of PAD required to prevent sensitisation in the D negative recipients. The calculation was adapted to consider the presence of organ donor D positive adult RBCs in the circulation of recipients instead of, larger, fetal RBCs. RESULTS Samples from 20 patients, all female, aged 14-53 years (one 2-year-old outlier) were referred from 2016 to September 2020. The transplants were-liver (n = 6), kidney (n = 6) and lung (n = 8). D positive cell populations were identified in 11 cases (0.1-8.0 ml); and required PAD (500-1500 IU). From these 20 patients, 10 sent a follow-up sample, where 8 required PAD top-up due to the detection of residual D positive cells (0.1-2 ml)-liver (n = 1), kidney (n = 1) and lung transplant (n = 6). CONCLUSION All patients in the study were D negative females, in which 18 were considered by guidelines to be of childbearing potential (2-42 years old) and 2 were >50 years old. Referrals demonstrate an awareness for the correct calculation of PAD to prevent D sensitisation. The sample size is small, but top up requirement in 8/20 of cases demonstrates accurate quantification is clearly needed to ensure the appropriate dose of PAD is provided.
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Affiliation(s)
- Vera Rosa
- Red Cell Immunohaematology, NHS Blood & Transplant, Bristol, UK
| | - Matthew Hazell
- Red Cell Immunohaematology, NHS Blood & Transplant, Bristol, UK
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Almeida GHDR, Iglesia RP, Araújo MS, Carreira ACO, Dos Santos EX, Calomeno CVAQ, Miglino MA. Uterine Tissue Engineering: Where We Stand and the Challenges Ahead. TISSUE ENGINEERING PART B-REVIEWS 2021; 28:861-890. [PMID: 34476997 DOI: 10.1089/ten.teb.2021.0062] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Tissue engineering is an innovative approach to develop allogeneic tissues and organs. The uterus is a very sensitive and complex organ, which requires refined techniques to properly regenerate and even, to rebuild itself. Many therapies were developed in 20th century to solve reproductive issues related to uterus failure and, more recently, tissue engineering techniques provided a significant evolution in this issue. Herein we aim to provide a broad overview and highlights of the general concepts involved in bioengineering to reconstruct the uterus and its tissues, focusing on strategies for tissue repair, production of uterine scaffolds, biomaterials and reproductive animal models, highlighting the most recent and effective tissue engineering protocols in literature and their application in regenerative medicine. In addition, we provide a discussion about what was achieved in uterine tissue engineering, the main limitations, the challenges to overcome and future perspectives in this research field.
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Affiliation(s)
- Gustavo Henrique Doná Rodrigues Almeida
- University of São Paulo, Faculty of Veterinary and Animal Science, Professor Orlando Marques de Paiva Avenue, 87, Butantã, SP, Sao Paulo, São Paulo, Brazil, 05508-900.,University of São Paulo Institute of Biomedical Sciences, 54544, Cell and Developmental Biology, Professor Lineu Prestes Avenue, 1374, Butantã, SP, Sao Paulo, São Paulo, Brazil, 05508-900;
| | - Rebeca Piatniczka Iglesia
- University of São Paulo Institute of Biomedical Sciences, 54544, Cell and Developmental Biology, Sao Paulo, São Paulo, Brazil;
| | - Michelle Silva Araújo
- University of São Paulo, Faculty of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil., São Paulo, São Paulo, Brazil;
| | - Ana Claudia Oliveira Carreira
- University of São Paulo, Faculty of Veterinary Medicine and Animal Science, University of São Paulo, SP, Brazil, São Paulo, São Paulo, Brazil;
| | - Erika Xavier Dos Santos
- State University of Maringá, 42487, Department of Morphological Sciences, State University of Maringá, Maringá, PR, Brazil, Maringa, PR, Brazil;
| | - Celso Vitor Alves Queiroz Calomeno
- State University of Maringá, 42487, Department of Morphological Sciences, State University of Maringá, Maringá, PR, Brazil, Maringa, PR, Brazil;
| | - Maria Angélica Miglino
- University of São Paulo, Faculty of Veterinary and Animal Science Professor Orlando Marques de Paiva Avenue, 87 Butantã SP Sao Paulo, São Paulo, BR 05508-900, São Paulo, São Paulo, Brazil;
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Alomar OSK. Comparison between single and multiple renal vessels in live donor allograft kidney transplantation: Surgical aspects and outcomes, 25 years experience. INTERNATIONAL JOURNAL OF SURGERY OPEN 2021. [DOI: 10.1016/j.ijso.2021.100394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Azu OO, Olojede SO, Lawal SK, Oseni SO, Rennie CO, Offo U, Naidu ECS. Novel severe acute respiratory syndrome coronavirus 2 (SARS-COV-2) infection: Microbiologic perspectives and anatomic considerations for sanctuary sites. J Infect Public Health 2021; 14:1237-1246. [PMID: 34455307 PMCID: PMC8378066 DOI: 10.1016/j.jiph.2021.08.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 07/31/2021] [Accepted: 08/15/2021] [Indexed: 11/25/2022] Open
Abstract
Introduction A significant chunk of global life – the economy, sports, aviation, academic, and entertainment activities – has significantly been affected by the ravaging outbreak of severe acute respiratory syndrome coronavirus 2 (SARS-COV-2) with devastating consequences on morbidity and mortality in many countries of the world. Methods This review utilized search engines such as google scholar, PubMed, ResearchGate, and web of science to retrieve articles and information using keywords like “Coronavirus”, “SARS-CoV-2”, “COVID-19”, “Origin of coronavirus and SARS-CoV-2”, “microbiology of coronavirus”, “microbiology of SARS-CoV-2”, COVID-19”, “Coronavirus reservoir sites”, “Anatomic sanctuary sites and SARS-CoV-2”, biological barriers and coronavirus”, biological barrier and SARS-CoV-2”. Results While this pandemic has caught the global scientific community at its lowest level of preparedness, it has inadvertently created a unified and wholesome approach towards developing potential vaccine (s) candidates by escalating clinical trial protocols in many countries of Europe, China and the United States. Interestingly, viral pathobiology continues to be an evolving aspect that potentially shows that the management of the current outbreak may largely depend on the discovery of a vaccine as the administration of known antiviral drugs are proving to offer some respite. Unfortunately, discontinuation and longtime administration of these drugs have been implicated in endocrine, reproductive and neurological disorders owing to the development of pathological lesions at anatomical sanctuary sites such as the brain and testis, as well as the presence of complex biological barriers that permit the entry of viruses but selective to the entrance of chemical substances and drugs. Conclusion This review focuses on the microbiologic perspectives and importance of anatomical sanctuary sites in the possible viral rebound or reinfection into the system and their implications in viral re-entry and development of reproductive and neurological disorders in COVID-19 patients.
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Affiliation(s)
- Onyemaechi O Azu
- Department of Anatomy, School of Medicine, University of Namibia, Private Bag, Windhoek, 13301, Namibia.
| | - Samuel O Olojede
- Discipline of Clinical Anatomy, School of Laboratory Medicine & Medical Sciences, Nelson R Mandela School of Medicine, University of KwaZulu-Natal, 719 Umbilo Road, Durban, South Africa
| | - Sodiq K Lawal
- Discipline of Clinical Anatomy, School of Laboratory Medicine & Medical Sciences, Nelson R Mandela School of Medicine, University of KwaZulu-Natal, 719 Umbilo Road, Durban, South Africa
| | - Saheed O Oseni
- Department of Biological Sciences, Florida Atlantic University, Davie, FL 33314, USA
| | - Carmen O Rennie
- Discipline of Clinical Anatomy, School of Laboratory Medicine & Medical Sciences, Nelson R Mandela School of Medicine, University of KwaZulu-Natal, 719 Umbilo Road, Durban, South Africa
| | - Ugochukwu Offo
- Department of Pre-Clinical Sciences, University of Limpopo, South Africa
| | - Edwin C S Naidu
- Discipline of Clinical Anatomy, School of Laboratory Medicine & Medical Sciences, Nelson R Mandela School of Medicine, University of KwaZulu-Natal, 719 Umbilo Road, Durban, South Africa
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Nguyen NT, Maxwell AP, Donnelly M, O'Neill C. The role of motivational and legal contexts in understanding support for tissue donation across 27 European countries. Eur J Public Health 2021; 31:259-264. [PMID: 33024999 DOI: 10.1093/eurpub/ckaa148] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND There is a mismatch between attitudinal support for tissue donation and its translation into behavioural action (i.e. become registered donor). The legal and motivational context around tissue donation may contribute to better understanding of this mismatch. METHODS Data were extracted from the Eurobarometer 82.2 survey (2014). Data included socio-demographic characteristics, motivations underlying attitudes to tissue donation and the legal context within which donation was considered (opt-in and opt-out consent). The sample was partitioned based on contextual information and seemingly unrelated bivariate probit regressions were used to explore the relationship between passive and active support for tissue donation. RESULTS Approximately 56% of 25 879 respondents stated a willingness to donate tissue after death (passive support) and 9.1% reported that they were a registered donor (active support). We found evidence of unobserved heterogeneity between active and passive support across contexts. Our findings suggest that contexts in which altruistic motives can be supported by self-interest may increase the probability of converting passive to active support. Factors associated with increased support for tissue donation included: higher levels of education; good knowledge of the healthcare system; confidence in the safety of tissue donation; readiness to be a tissue recipient and knowing a recipient of donated tissue. CONCLUSIONS Our findings demonstrate the value of examining active and passive support for tissue donation together within specific contexts. This more nuanced approach affords clearer insights that may help to guide policy makers confronted with apparently conflicting evidence around strategies intended to promote organ and tissue donation.
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Affiliation(s)
- Nga Tq Nguyen
- Centre for Public Health, Queen's University Belfast, Belfast, UK
| | - Alexander P Maxwell
- Centre for Public Health, Queen's University Belfast, Belfast, UK.,Regional Nephrology Unit, Belfast City Hospital, Belfast, UK
| | - Michael Donnelly
- Centre for Public Health, Queen's University Belfast, Belfast, UK
| | - Ciaran O'Neill
- Centre for Public Health, Queen's University Belfast, Belfast, UK
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Nijhoff MF, Pol RA, Volbeda M, Kotsopoulos AM, Sonneveld JP, Otterspoor L, Abdo WF, Silderhuis VM, El Moumni M, Moers C. External Validation of the DCD-N Score and a Linear Prediction Model to Identify Potential Candidates for Organ Donation After Circulatory Death: A Nationwide Multicenter Cohort Study. Transplantation 2021; 105:1311-1316. [PMID: 32858575 PMCID: PMC8168928 DOI: 10.1097/tp.0000000000003430] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 07/07/2020] [Accepted: 07/09/2020] [Indexed: 11/26/2022]
Abstract
BACKGROUND Donation after circulatory death (DCD) is a procedure in which after planned withdrawal of life-sustaining treatment (WLST), the dying process is monitored. A DCD procedure can only be continued if the potential organ donor dies shortly after WLST. This study performed an external validation of 2 existing prediction models to identify potentially DCD candidates, using one of the largest cohorts. METHODS This multicenter retrospective study analyzed all patients eligible for DCD donation from 2010 to 2015. The first model (DCD-N score) assigned points for absence of neurological reflexes and oxygenation index. The second model, a linear prediction model (LPDCD), yielded the probability of death within 60 min. This study determined discrimination (c-statistic) and calibration (Hosmer and Lemeshow test) for both models. RESULTS This study included 394 patients, 283 (72%) died within 60 min after WLST. The DCD-N score had a c-statistic of 0.77 (95% confidence intervals, 0.71-0.83) and the LPDCD model 0.75 (95% confidence intervals, 0.68-0.81). Calibration of the LPDCD 60-min model proved to be poor (Hosmer and Lemeshow test, P < 0.001). CONCLUSIONS The DCD-N score and the LPDCD model showed good discrimination but poor calibration for predicting the probability of death within 60 min. Construction of a new prediction model on a large data set is needed to obtain better calibration.
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Affiliation(s)
- Maaike F. Nijhoff
- Department of Surgery, Division of Vascular and Transplantation Surgery, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands
| | - Robert A. Pol
- Department of Surgery, Division of Vascular and Transplantation Surgery, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands
| | - Meint Volbeda
- Department of Critical Care, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands
| | | | | | - Luuk Otterspoor
- Department of Cardiology, Catharina Hospital, Eindhoven, The Netherlands
| | - Wilson F. Abdo
- Department of Intensive Care, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Vera M. Silderhuis
- Department of Intensive Care Unit, Medisch Spectrum Twente Hospital, Enschede, The Netherlands
| | - Mostafa El Moumni
- Department of Surgery, Division of Vascular and Transplantation Surgery, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands
| | - Cyril Moers
- Department of Surgery, Division of Vascular and Transplantation Surgery, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands
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Marinho A, Araújo CAS. Using data envelopment analysis and the bootstrap method to evaluate organ transplantation efficiency in Brazil. Health Care Manag Sci 2021; 24:569-581. [PMID: 33730290 DOI: 10.1007/s10729-021-09552-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 01/29/2021] [Indexed: 11/28/2022]
Abstract
Brazil has the most extensive public program for organ transplantation in the world, and the Brazilian National Health System (SUS) provides full coverage of all costs involved in organ donation, transplants, and post-transplant. Despite the relevance of the subject and the shortage of organs for transplants, transplantation process efficiency assessments are still uncommon in Brazil and abroad. This study aims to evaluate the efficiency of the Brazilian states and the Federal District in transforming potential organ donors into actual donations. We applied data envelopment analysis (DEA) in conjunction with the bootstrap technique, using organ transplantation data from 2018. The bootstrap methods applied (bootstrap technique, the bootstrap-biased scores of efficiency, and the bootstrap bias-corrected scores of efficiency) allow to obtain a confidence interval for DEA scores and provide greater robustness to studies based on DEA methodology. The bootstrap bias-corrected model indicates that there is significant room for improvement in terms of converting potential donors into actual donors. The mean corrected score is 0.55, signalizing that altogether the Brazilian states could maximize in 45% the number of transplanted organs without necessarily increasing the pool of potential donors. The study provides insights into the Brazilian processes of organ donation and transplantation, helping to identify locations in need of resource allocation improvements. Given the scarcity of studies with a joint application of DEA and bootstrap techniques in this crucial health activity, we also intend to methodologically contribute to this type of benchmark analysis, emphasizing the importance of considering measurement errors, randomness, and bias at DEA models.
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Affiliation(s)
- Alexandre Marinho
- Economic Department, Rio de Janeiro State University, Rua São Francisco Xavier, 524 - Maracanã, Rio de Janeiro, RJ, 20550-900, Brazil.
| | - Claudia Affonso Silva Araújo
- COPPEAD Graduate School of Business, Federal University of Rio de Janeiro, Rua Pascoal Lemme, 355 - Cidade Universitária, Rio de Janeiro, RJ, 21941-918, Brazil.,Fundação Getulio Vargas's Sao Paulo School of Business Administration -FGV/EAESP, Av. 9 de julho, 2029 Edifício John F. Kennedy - Bela Vista, São Paulo, SP, 01313-902, Brazil
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Barth A, Szőllősi GJ, Nemes B. Factors Affecting Access to the Kidney Transplant Waiting List in Eastern Hungary. Transplant Proc 2021; 53:1418-1422. [PMID: 33640164 DOI: 10.1016/j.transproceed.2021.01.044] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Kidney transplantation is the best available treatment choice for patients suffering from end-stage renal disease; however, not all patients with end-stage renal disease have equal access to it. The aim of the study was to measure the factors that may influence access to the kidney transplant waiting list in eastern Hungary. A total of 254 patients with renal failure between 18 and 75 years old from 8 dialysis centers participated in the study. The factors associated with access to the waiting list were identified by univariate descriptive analysis and multivariate logistic regression analysis where the outcome variable was placement on the kidney transplant waiting list. Our findings demonstrates that patients registered on the waiting list were younger (odds ratio [OR] = 0.96; 95% confidence interval [CI], 0.94-0.98), were male (OR = 0.54; 95% CI, 0.30-0.98), were economically active (OR = 0.53; 95% CI, 0.29-0.98), and had greater knowledge in the field (OR = 1.17; 95% CI, 1.03-1.33). Disparity in access to the kidney transplant waiting list in Hungary does exist.
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Affiliation(s)
- Anita Barth
- Department of Transplantation, Institute of Surgery, Faculty of Medicine, University of Debrecen, Debrecen, Hungary; Department of Nursing Science, Faculty of Health, University of Debrecen, Nyiregyhaza, Hungary; Doctoral School of Health Sciences, University of Debrecen, Debrecen, Hungary.
| | | | - Balázs Nemes
- Department of Transplantation, Institute of Surgery, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
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Deceased Organ Transplantation in Bangladesh: The Dynamics of Bioethics, Religion and Culture. HEC Forum 2021; 34:139-167. [PMID: 33595774 PMCID: PMC7887719 DOI: 10.1007/s10730-020-09436-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/17/2020] [Indexed: 11/07/2022]
Abstract
Organ transplantation from living related donors in Bangladesh first began in October 1982, and became commonplace in 1988. Cornea transplantation from posthumous donors began in 1984 and living related liver and bone marrow donor transplantation began in 2010 and 2014 respectively. The Human Organ Transplantation Act officially came into effect in Bangladesh on 13th April 1999, allowing organ donation from both brain-dead and related living donors for transplantation. Before the legislation, religious leaders issued fatwa, or religious rulings, in favor of organ transplantation. The Act was amended by the Parliament on 8th January, 2018 with the changes coming into effect shortly afterwards on 28th January. However, aside from a few posthumous corneal donations, transplantation of vital organs, such as the kidney, liver, heart, pancreas, and other body parts or organs from deceased donors, has remained absent in Bangladesh. The major question addressed in this article is why the transplantation of vital organs from deceased donors is absent in Bangladesh. In addition to the collection of secondary documents, interviews were conducted with senior transplant physicians, patients and their relatives, and the public, to learn about posthumous organ donation for transplantation. Interviews were also conducted with a medical student and two grief counselors to understand the process of counseling the families and obtaining consent to obtain posthumous cornea donations from brain-dead patients. An interview was conducted with a professional anatomist to understand the processes behind body donation for the purposes of medical study and research. Their narrative reveals that transplant physicians may be reticent to declare brain death as the stipulations of the 1999 act were unclear and vague. This study finds that Bangladeshis have strong family ties and experience anxiety around permitting separating body parts of dead relatives for organ donation for transplantation, or donating the dead body for medical study and research purposes. Posthumous organ donation for transplantation is commonly viewed as a wrong deed from a religious point of view. Religious scholars who have been consulted by the government have approved posthumous organ donation for transplantation on the grounds of necessity to save lives even though violating the human body is generally forbidden in Islam. An assessment of the dynamics of biomedicine, religion and culture leads to the conclusion that barriers to posthumous organ donation for transplantation that are perceived to be religious may actually stem from cultural attitudes. The interplay of faith, belief, religion, social norms, rituals and wider cultural attitudes with biomedicine and posthumous organ donation and transplantation is very complex. Although overcoming the barriers to organ donation for transplantation is challenging, initiation of transplantation of vital organs from deceased donors is necessary within Bangladesh. This will ensure improved healthcare outcomes, prevent poor people from being coerced into selling their organs to rich recipients, and protect the solidarity and progeny of Bangladeshi families.
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Decarli MC, do Amaral RLF, Dos Santos DP, Tofani LB, Katayama E, Rezende RA, Silva JVLD, Swiech K, Suazo CAT, Mota C, Moroni L, Moraes ÂM. Cell spheroids as a versatile research platform: formation mechanisms, high throughput production, characterization and applications. Biofabrication 2021; 13. [PMID: 33592595 DOI: 10.1088/1758-5090/abe6f2] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 02/16/2021] [Indexed: 11/12/2022]
Abstract
Three-dimensional cell culture has tremendous advantages to closely mimic the in vivo architecture and microenvironment of healthy tissue and organs, as well as of solid tumors. Spheroids are currently the most attractive 3D model to produce uniform reproducible cell structures as well as a potential basis for engineering large tissues and complex organs. In this review we discuss, from an engineering perspective, processes to obtain uniform 3D cell spheroids, comparing dynamic and static cultures and considering aspects such as mass transfer and shear stress. In addition, computational and mathematical modelling of complex cell spheroid systems are discussed. The non-cell-adhesive hydrogel-based method and dynamic cell culture in bioreactors are focused in detail and the myriad of developed spheroid characterization techniques is presented. The main bottlenecks and weaknesses are discussed, especially regarding the analysis of morphological parameters, cell quantification and viability, gene expression profiles, metabolic behavior and high-content analysis. Finally, a vast set of applications of spheroids as tools for in vitro study model systems is examined, including drug screening, tissue formation, pathologies development, tissue engineering and biofabrication, 3D bioprinting and microfluidics, together with their use in high-throughput platforms.
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Affiliation(s)
- Monize Caiado Decarli
- School of Chemical Engineering/Department of Engineering of Materials and of Bioprocesses, University of Campinas, Av. Albert Einstein, 500 - Bloco A - Cidade Universitária Zeferino Vaz, Cidade Universitária Zeferino Vaz, Campinas, SP, 13083-852, BRAZIL
| | - Robson Luis Ferraz do Amaral
- School of Pharmaceutical Sciences of Ribeirão Preto/Department of Pharmaceutical Sciences, University of São Paulo, Avenida do Café, no number, Ribeirão Preto, SP, 14040-903, BRAZIL
| | - Diogo Peres Dos Santos
- Departament of Chemical Engineering, Federal University of São Carlos, Rod. Washington Luiz (SP-310), km 235, São Carlos, SP, 13565-905, BRAZIL
| | - Larissa Bueno Tofani
- School of Pharmaceutical Sciences of Ribeirão Preto/Department of Pharmaceutical Sciences, University of São Paulo, Avenida do Café, no number, Ribeirão Preto, SP, 14040-903, BRAZIL
| | - Eric Katayama
- Departament of Chemical Engineering, Federal University of São Carlos, Rod. Washington Luiz (SP-310), km 235, São Carlos, SP, 13565-905, BRAZIL
| | - Rodrigo Alvarenga Rezende
- Centro de Tecnologia da Informacao Renato Archer, Rod. Dom Pedro I (SP-65), km 143,6 - Amarais, Campinas, SP, 13069-901, BRAZIL
| | - Jorge Vicente Lopes da Silva
- Centro de Tecnologia da Informacao Renato Archer, Rod. Dom Pedro I (SP-65), km 143,6 - Amarais, Campinas, SP, 13069-901, BRAZIL
| | - Kamilla Swiech
- University of Sao Paulo, School of Pharmaceutical Sciences of Ribeirão Preto/Department of Pharmaceutical Sciences, Ribeirao Preto, SP, 14040-903, BRAZIL
| | - Cláudio Alberto Torres Suazo
- Department of Chemical Engineering, Federal University of São Carlos, Rod. Washington Luiz (SP-310), km 235, São Carlos, SP, 13565-905, BRAZIL
| | - Carlos Mota
- Department of Complex Tissue Regeneration (CTR), University of Maastricht , Universiteitssingel, 40, office 3.541A, Maastricht, 6229 ER, NETHERLANDS
| | - Lorenzo Moroni
- Complex Tissue Regeneration, Maastricht University, Universiteitsingel, 40, Maastricht, 6229ER, NETHERLANDS
| | - Ângela Maria Moraes
- School of Chemical Engineering/Department of Engineering of Materials and of Bioprocesses, University of Campinas, Av. Albert Einstein, 500 - Bloco A - Cidade Universitária Zeferino Vaz, Campinas, SP, 13083-852, BRAZIL
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Ke D, Jorgensen AM, Lee SJ, Yoo JJ, Murphy SV. Adenosine-treated bioprinted muscle constructs prolong cell survival and improve tissue formation. Biodes Manuf 2021. [DOI: 10.1007/s42242-021-00128-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Kantidakis G, Putter H, Lancia C, Boer JD, Braat AE, Fiocco M. Survival prediction models since liver transplantation - comparisons between Cox models and machine learning techniques. BMC Med Res Methodol 2020; 20:277. [PMID: 33198650 PMCID: PMC7667810 DOI: 10.1186/s12874-020-01153-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Accepted: 10/26/2020] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND Predicting survival of recipients after liver transplantation is regarded as one of the most important challenges in contemporary medicine. Hence, improving on current prediction models is of great interest.Nowadays, there is a strong discussion in the medical field about machine learning (ML) and whether it has greater potential than traditional regression models when dealing with complex data. Criticism to ML is related to unsuitable performance measures and lack of interpretability which is important for clinicians. METHODS In this paper, ML techniques such as random forests and neural networks are applied to large data of 62294 patients from the United States with 97 predictors selected on clinical/statistical grounds, over more than 600, to predict survival from transplantation. Of particular interest is also the identification of potential risk factors. A comparison is performed between 3 different Cox models (with all variables, backward selection and LASSO) and 3 machine learning techniques: a random survival forest and 2 partial logistic artificial neural networks (PLANNs). For PLANNs, novel extensions to their original specification are tested. Emphasis is given on the advantages and pitfalls of each method and on the interpretability of the ML techniques. RESULTS Well-established predictive measures are employed from the survival field (C-index, Brier score and Integrated Brier Score) and the strongest prognostic factors are identified for each model. Clinical endpoint is overall graft-survival defined as the time between transplantation and the date of graft-failure or death. The random survival forest shows slightly better predictive performance than Cox models based on the C-index. Neural networks show better performance than both Cox models and random survival forest based on the Integrated Brier Score at 10 years. CONCLUSION In this work, it is shown that machine learning techniques can be a useful tool for both prediction and interpretation in the survival context. From the ML techniques examined here, PLANN with 1 hidden layer predicts survival probabilities the most accurately, being as calibrated as the Cox model with all variables. TRIAL REGISTRATION Retrospective data were provided by the Scientific Registry of Transplant Recipients under Data Use Agreement number 9477 for analysis of risk factors after liver transplantation.
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Affiliation(s)
- Georgios Kantidakis
- Mathematical Institute (MI) Leiden University, Niels Bohrweg 1, Leiden, 2333 CA, the Netherlands. .,Department of Biomedical Data Sciences, Section Medical Statistics, Leiden University Medical Center (LUMC), Albinusdreef 2, Leiden, 2333 ZA, The Netherlands. .,Department of Statistics, European Organisation for Research and Treatment of Cancer (EORTC) Headquarters, Ave E. Mounier 83/11, Brussels, 1200, Belgium.
| | - Hein Putter
- Department of Biomedical Data Sciences, Section Medical Statistics, Leiden University Medical Center (LUMC), Albinusdreef 2, Leiden, 2333 ZA, The Netherlands
| | - Carlo Lancia
- Mathematical Institute (MI) Leiden University, Niels Bohrweg 1, Leiden, 2333 CA, the Netherlands
| | - Jacob de Boer
- Department of Surgery, Leiden University Medical Center (LUMC), Albinusdreef 2, Leiden, 2333 ZA, the Netherlands
| | - Andries E Braat
- Department of Surgery, Leiden University Medical Center (LUMC), Albinusdreef 2, Leiden, 2333 ZA, the Netherlands
| | - Marta Fiocco
- Mathematical Institute (MI) Leiden University, Niels Bohrweg 1, Leiden, 2333 CA, the Netherlands.,Department of Biomedical Data Sciences, Section Medical Statistics, Leiden University Medical Center (LUMC), Albinusdreef 2, Leiden, 2333 ZA, The Netherlands.,Trial and Data Center, Princess Máxima Center for pediatric oncology (PMC), Heidelberglaan 25, Utrecht, 3584 CS, the Netherlands
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Hacker KS, Jansson K, Pichler J, Salman J, Avsar M, Siemeni T, Knöfel AK, Höffler K, Gottlieb J, Frühauf J, Werner M, Poyanmehr R, Jonigk D, Balzer MS, Hewicker-Trautwein M, Haverich A, Sommer W, Warnecke G. Delayed non-myeloablative irradiation to induce long-term allograft acceptance in a large animal lung transplantation model. Transpl Immunol 2020; 65:101350. [PMID: 33127498 DOI: 10.1016/j.trim.2020.101350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 10/26/2020] [Accepted: 10/26/2020] [Indexed: 11/30/2022]
Abstract
We previously induced long-term allograft acceptance in an allogeneic lung transplantation (LTx) model in miniature swine using perioperative non-myeloablative irradiation (IRR) combined with infusion of donor specific alloantigen. In order to improve clinical applicability, we delayed induction with irradiation in this study. Left sided single LTx was performed in minipigs. Group 1 received non-myeloablative irradiation (7Gy thymus and 1.5Gy whole body IRR) before LTx and a perioperative donor specific splenocyte infusion (SpTx). Group 2 received perioperative SpTx but delayed IRR three days after LTx. Group 3 was exposed to delayed IRR without SpTx. Whereas 4 out of 7 animals from the non-delayed group never rejected their grafts and were electively sacrificed on postoperative day (POD) +500, all animals from group 2 rejected their grafts before POD 108. In group 3, 3 out of 8 animals developed long-term allograft acceptance. In all groups, donor leukocyte chimerism peaked up to 20% in peripheral blood one hour after reperfusion of the lung. Group 1 maintained prolonged chimerism beyond POD 7, whereas chimerism levels in groups 2 and 3 decreased continuously thereafter. Delayed irradiation has the potential to improve long-term graft survival, yet not as efficient as a perioperative conditioning protocol.
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Affiliation(s)
- Karolin S Hacker
- Division of Cardiac, Thoracic, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany; German Centre for Lung Research, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Katharina Jansson
- Division of Cardiac, Thoracic, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany; German Centre for Lung Research, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Jeanette Pichler
- Division of Cardiac, Thoracic, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany; German Centre for Lung Research, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Jawad Salman
- Division of Cardiac, Thoracic, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Murat Avsar
- Division of Cardiac, Thoracic, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Thierry Siemeni
- Division of Cardiac, Thoracic, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Ann-Kathrin Knöfel
- Division of Cardiac, Thoracic, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany; German Centre for Lung Research, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Klaus Höffler
- Division of Cardiac, Thoracic, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Jens Gottlieb
- German Centre for Lung Research, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany; Department of Respiratory Medicine, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Jörg Frühauf
- Department of Radiation Therapy and Oncology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Martin Werner
- Department of Radiation Therapy and Oncology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Reza Poyanmehr
- Division of Cardiac, Thoracic, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Danny Jonigk
- Institute for Pathology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Michael S Balzer
- Department of Nephrology and Hypertension, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Marion Hewicker-Trautwein
- Department of Pathology, University of Veterinary Medicine Hannover, Bünteweg 17, 30559 Hannover, Germany
| | - Axel Haverich
- Division of Cardiac, Thoracic, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany; German Centre for Lung Research, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Wiebke Sommer
- Division of Cardiac, Thoracic, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany; German Centre for Lung Research, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Gregor Warnecke
- Division of Cardiac, Thoracic, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany; German Centre for Lung Research, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany.
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Yang FC, Chen HM, Huang CM, Hsieh PL, Wang SS, Chen CM. The Difficulties and Needs of Organ Transplant Recipients during Postoperative Care at Home: A Systematic Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17165798. [PMID: 32796529 PMCID: PMC7459921 DOI: 10.3390/ijerph17165798] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/18/2020] [Accepted: 07/21/2020] [Indexed: 02/06/2023]
Abstract
With recent advances in surgery and immunosuppressive drugs, organ transplantation has become a major treatment for irreversible organ failure. However, organ transplant recipients returning home after operation may face ongoing physiological, psychological, and social difficulties. To increase recipients’ quality of life, postoperative care at home is critical. Thus, the aim of this systematic literature review was to explore recipients’ difficulties and needs during postoperative care at home. Our search conformed to Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines and returned 23 relevant articles published from 1997–2020 in PubMed, MEDLINE, EBSCO, Cochrane, ProQuest, and CEPS, which were assessed using the Modified Jadad Scale or the 32 Consolidated Criteria for Reporting Qualitative Research (COREQ) appraisal indices and then synthesized through narration. The most common difficulties faced were psychological difficulties, followed by physiological, social, and other difficulties; the most common needs were psychological needs, followed by education and information training, social, and other needs. These results demonstrated that healthcare professionals can do more to provide patients with comprehensive care and promote successful self-management and quality of life at home. They also confirmed that collaboration between transplant teams, caregivers, and patients is necessary to optimize postoperative outcomes. We suggest that customized care may promote postoperative patients’ self-management and quality of life at home.
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Affiliation(s)
- Fu-Chi Yang
- College of General Education, National Chin-Yi University of Technology, Taichung 41170, Taiwan;
- Institute of Allied Health Sciences, College of Medicine, National Cheng Kung University, Tainan 701401, Taiwan
| | - Hsiao-Mei Chen
- Department of Nursing, Chung Shan Medical University, Taichung 40201, Taiwan;
| | - Chiu-Mieh Huang
- Institute of Clinical Nursing, School of Nursing, National Yang-Ming University, Taipei 11221, Taiwan;
| | - Pei-Lun Hsieh
- Department of Nursing, College of Health, National Taichung University of Science and Technology, Taichung 40343, Taiwan;
| | - Shoei-Shen Wang
- Department of Surgery, National Taiwan University Hospital, Taipei 100225, Taiwan;
- College of Medicine, National Taiwan University, Taipei 100233, Taiwan
- Department of Surgery, Fu Jen Catholic University Hospital, New Taipei City 24352, Taiwan
- School of Medicine, Fu Jen Catholic University College of Medicine, New Taipei City 242062, Taiwan
| | - Ching-Min Chen
- Department of Nursing, Institute of Allied Health Sciences, College of Medicine, National Cheng Kung University, Tainan 701401, Taiwan
- Correspondence:
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Implementing of Active Brain-Dead Donor Identification Strategy in a Single Donor Center: One Year Experience. ACTA ACUST UNITED AC 2020; 56:medicina56080366. [PMID: 32707964 PMCID: PMC7466291 DOI: 10.3390/medicina56080366] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 07/16/2020] [Accepted: 07/17/2020] [Indexed: 11/24/2022]
Abstract
Background and objectives: Organ shortage is considered to be a major limitation for increasing transplantation rates. Brain-dead donors (DBDs) are an important source of organs, but up to 50% of potential DBDs might not be identified. An active brain-dead donor search could potentially increase a deceased donor pool. The aim of this study was to evaluate the effectiveness of an active potential DBD identification program and to evaluate one year impact on the potential organ donor pool in Lithuania‘s biggest medical institution. Materials and Methods: An organ donor coordinator service was established and active DBD search strategy was implemented in the hospital of LSMU Kauno Klinikos, and retrospective data analysis was performed between December 2016 and December 2017. Collected data was compared to the available data of the previous year in the same center and to the donation dynamics of the whole country. Results: A total of 6734 patients were treated in all intensive care units (ICU), and 234 (3.5%) of them were identified as possible donors. No increase in potential donor’s number was observed in study year (n = 34) compared to remote year (n = 37). No significant difference in potential donor’s demographic data, cause of death, family refusals and medical contraindication rates. Cerebral angiography (CA) repeated in 20% of potential donors in order to confirm brain death diagnosis. More potential donors for whom CA was repeated had decompressive craniectomy done (66.7% vs. 33.3%, p = 0.018). Decompressive craniectomy statistically significantly increases the rate of repeated CA (OR 12.7; 95% CI, 1.42–113.37; p = 0.023). Active search strategy increased length of hospital stay of potential donors comparing to previous year (3.97 ± 4.73 vs. 2.51 ± 2.63, p = 0.003). An optimal time of the first four days of hospitalization to identify a potential donor was observed during our study (OR 10.42; 95% CI, 4.29–25.34; p = 0.001). Conclusions: We were not able to demonstrate active donor identification strategy superiority over the passive strategy during a short one year period; nevertheless, valuable knowledge was gained in brain death diagnostics, new terminology was implemented, and the stability of actual donor numbers was observed in the experimental donor center in the light of decreasing national results. Long-term strategy is required to achieve sustainable results in organ donation.
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Otsuka R, Wada H, Murata T, Seino KI. Immune reaction and regulation in transplantation based on pluripotent stem cell technology. Inflamm Regen 2020; 40:12. [PMID: 32636970 PMCID: PMC7329400 DOI: 10.1186/s41232-020-00125-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Accepted: 06/08/2020] [Indexed: 12/21/2022] Open
Abstract
The development of pluripotent stem cell (PSC)-based technologies provides us a new therapeutic approach that generates grafts for transplantation. In order to minimize the risk of immune reaction, the banking of induced pluripotent stem cells (iPSCs) from donors with homozygous human leukocyte antigen (HLA) haplotype is planned in Japan. Even though pre-stocked and safety validated HLA-homozygous iPSCs are selected, immunological rejection may potentially occur because the causes of rejection are not always due to HLA mismatches. A couple of studies concerning such immunological issues have reported that genetic ablation of HLA molecules from PSC combined with gene transduction of several immunoregulatory molecules may be effective in avoiding immunological rejection. Also, our research group has recently proposed a concept that attempts to regulate recipient immune system by PSC-derived immunoregulatory cells, which results in prolonged survival of the same PSC-derived allografts. PSC-based technologies enable us to choose a new therapeutic option; however, considering its safety from an immunological point of view should be of great importance for safe clinical translation of this technology.
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Affiliation(s)
- Ryo Otsuka
- Institute for Genetic Medicine, Hokkaido University, Kita-15, Nishi-7, Sapporo, Hokkaido 060-0815 Japan
| | - Haruka Wada
- Institute for Genetic Medicine, Hokkaido University, Kita-15, Nishi-7, Sapporo, Hokkaido 060-0815 Japan
| | - Tomoki Murata
- Institute for Genetic Medicine, Hokkaido University, Kita-15, Nishi-7, Sapporo, Hokkaido 060-0815 Japan
| | - Ken-Ichiro Seino
- Institute for Genetic Medicine, Hokkaido University, Kita-15, Nishi-7, Sapporo, Hokkaido 060-0815 Japan
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Whole Organ Engineering: Approaches, Challenges, and Future Directions. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10124277] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
End-stage organ failure remains a leading cause of morbidity and mortality across the globe. The only curative treatment option currently available for patients diagnosed with end-stage organ failure is organ transplantation. However, due to a critical shortage of organs, only a fraction of these patients are able to receive a viable organ transplantation. Those patients fortunate enough to receive a transplant must then be subjected to a lifelong regimen of immunosuppressant drugs. The concept of whole organ engineering offers a promising alternative to organ transplantation that overcomes these limitations. Organ engineering is a discipline that merges developmental biology, anatomy, physiology, and cellular interactions with enabling technologies such as advanced biomaterials and biofabrication to create bioartificial organs that recapitulate native organs in vivo. There have been numerous developments in bioengineering of whole organs over the past two decades. Key technological advancements include (1) methods of whole organ decellularization and recellularization, (2) three-dimensional bioprinting, (3) advanced stem cell technologies, and (4) the ability to genetically modify tissues and cells. These advancements give hope that organ engineering will become a commercial reality in the next decade. In this review article, we describe the foundational principles of whole organ engineering, discuss key technological advances, and provide an overview of current limitations and future directions.
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Rezahosseini O, Sørensen SS, Perch M, Ekenberg C, Møller DL, Knudsen AD, Kirkby N, Lundgren J, Lodding IP, Wareham NE, Gustafsson F, Rasmussen A, Nielsen SD. Measles, mumps, rubella, and varicella-zoster virus serology and infections in solid organ transplant recipients during the first year post-transplantation. Clin Infect Dis 2020; 73:e3733-e3739. [PMID: 32564061 DOI: 10.1093/cid/ciaa824] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 06/16/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Mumps, measles, rubella, and varicella-zoster viruses (MMRV) may cause severe infections in seronegative adult solid organ transplant (SOT) recipients but can be prevented by vaccination. We aimed to determine MMRV serostatus in adult SOT recipients before and one-year post-transplantation as well as evidence of MMRV infections in a large, prospective cohort of SOT recipients. METHODS A prospective study of 1182 adult SOT recipients included in the Management of Posttransplant Infections in Collaborating Hospitals (MATCH) cohort from 2011 to 2017 with a one-year follow-up. Systematic monitoring of MMRV serology was performed prior to transplantation and one-year post-transplantation. PCR was used to confirm viral replication in SOT-recipients presenting with clinical evidence of infection. RESULTS Among 1182 adult SOT recipients, 28 (2.4%), 77 (6.5%), 65 (5.5%), and 22 (1.9%) were seronegative for measles, mumps, rubella, and VZV, respectively, and 165 (14%) were seronegative for at least one of the MMRV viruses. One-year post-transplantation, 29/823 (3.5%) of seropositive SOT recipients had seroreverted, and 63/111 (57%) of seronegative SOT recipients seroconverted for at least one MMRV virus. No evidence of MMR infections was found, but 8 (0.7%) SOT recipients developed symptoms and had a positive VZV PCR. CONCLUSIONS A large proportion of SOT recipients were seronegative for at least one of the MMRV viruses. MMRV infections in SOT recipients may disseminate and become fatal, and although only few cases of VZV infection were detected, results from this study suggest increase attention towards vaccination of patients waiting for SOT.
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Affiliation(s)
- Omid Rezahosseini
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Søren Schwartz Sørensen
- Department of Nephrology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Michael Perch
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
- Department of Cardiology, Section for Lung Transplantation, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Christina Ekenberg
- Centre of Excellence for Health, Immunity, and Infections, Department of Infectious Diseases, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Dina Leth Møller
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Andreas Dehlbæk Knudsen
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- Department of Cardiology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Nikolai Kirkby
- Department of Clinical Microbiology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Jens Lundgren
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
- Centre of Excellence for Health, Immunity, and Infections, Department of Infectious Diseases, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Isabelle P Lodding
- Centre of Excellence for Health, Immunity, and Infections, Department of Infectious Diseases, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Neval Ete Wareham
- Centre of Excellence for Health, Immunity, and Infections, Department of Infectious Diseases, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Finn Gustafsson
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
- Department of Cardiology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Allan Rasmussen
- Department of Surgical Gastroenterology and Transplantation, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Susanne Dam Nielsen
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
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Abstract
The present review discusses current developments in tolerance induction for solid organ transplantation with a particular emphasis on chimerism-based approaches. It explains the basic mechanisms of chimerism-based tolerance and provides an update on ongoing clinical tolerance trials. The concept of "delayed tolerance" is presented, and ongoing preclinical studies in the nonhuman primate setting-including current limitations and hurdles regarding this approach-are illustrated. In addition, a brief overview and update on cell-based tolerogenic clinical trials is provided. In a critical approach, advantages, limitations, and potential implications for the future of these different regimens are discussed.
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Kachouie NN, Hamad F. Potential impact of OPTN plan in association with donors’ factors on survival times of transplanted kidneys. TRANSPLANTATION REPORTS 2020. [DOI: 10.1016/j.tpr.2020.100042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Ali MA, Khan S. Simultaneous Pancreas-Kidney Transplant: A Positive Stimulus in the Medical World. Cureus 2020; 12:e8308. [PMID: 32607292 PMCID: PMC7320660 DOI: 10.7759/cureus.8308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Kidneys are one of the essential organs of our body, with chronic kidney disease being a very prevalent and emotionally, mentally and physically straining condition affecting 1 in 15 people worldwide. The prevalence is further escalating with every passing year. It is slowly progressive in nature, and many times goes unnoticed until symptoms start manifesting and presenting themselves much later in life. In this article, end-stage renal disease (ESRD) due to diabetes mellitus and its effect on different organs is examined, along with the role of simultaneous pancreas-kidney transplant (SPKT) in the management of this condition. Although proven to be an assured treatment with an outstanding allograft acceptance rate, the fact that it is still not widely adopted in many healthcare setups due to financial implications is also studied. Online databases such as PubMed and Google Scholar were searched for the purpose of data collection; due to the very limited number of randomized controlled trials conducted on this given topic, a limited discussion was retrieved. By applying the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) method and several inclusion/exclusion criteria, approximately 66 articles were assessed for eligibility based on the title and abstract. A total of 44 articles were shortlisted and considered in the final review. Several systematic reviews that have been conducted in the past reveal the importance of SPKT at an early stage of diagnosis towards increasing longevity of the patient with freedom from multiple medications. Transplant is a cost-effective therapy when compared to the prolonged dependence on dialysis, insulin pens, and increased susceptibility to infections. A greater number of specialists must also train to carry out SPKT and identify the early stages of ESRD, and medical centers should be encouraged to carry out transplant procedures effectively both financially and medically. This can be achieved through the development of global policy mechanisms and establishment of universally adoptable standards.
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Affiliation(s)
- Muna A Ali
- Nephrology, California Institute of Behavioral Neurosciences & Psychology, Fairfield, USA.,Internal Medicine, Apollo Health City, Hyderabad, IND
| | - Safeera Khan
- Internal Medicine, California Institute of Behavioral Neurosciences & Psychology, Fairfield, USA
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Pehlivan E, Kılı L, Balcı A, Yazar E, Bakan N. The effects of preoperative pulmonary rehabilitation on early postoperative period following lung transplantation. EURASIAN JOURNAL OF PULMONOLOGY 2020. [DOI: 10.4103/ejop.ejop_54_19] [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
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Marie E, Navallas M, Navarro OM, Punnett A, Shammas A, Gupta A, Chami R, Shroff MM, Vali R. Posttransplant Lymphoproliferative Disorder in Children: A 360-degree Perspective. Radiographics 2019; 40:241-265. [PMID: 31834850 DOI: 10.1148/rg.2020190103] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
An earlier incorrect version of this article appeared online. This article was corrected on December 17, 2019.
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Affiliation(s)
- Eman Marie
- From the Departments of Medical Imaging (E.M., M.N., O.M.N., A.S., M.M.S., R.V.), Pediatrics (A.P.), and Laboratory Medicine and Pathobiology (R.C.), University of Toronto, Toronto, Ontario, Canada; and the Department of Diagnostic Imaging (E.M., M.N., O.M.N., A.G., M.M.S.), Division of Pediatric Hematology/Oncology, Department of Pediatrics (A.P.), Division of Nuclear Medicine, Department of Diagnostic Imaging (A.S., R.V.), and Department of Pediatric Pathology and Laboratory Medicine (R.C.), The Hospital for Sick Children, Toronto, Ontario, Canada
| | - María Navallas
- From the Departments of Medical Imaging (E.M., M.N., O.M.N., A.S., M.M.S., R.V.), Pediatrics (A.P.), and Laboratory Medicine and Pathobiology (R.C.), University of Toronto, Toronto, Ontario, Canada; and the Department of Diagnostic Imaging (E.M., M.N., O.M.N., A.G., M.M.S.), Division of Pediatric Hematology/Oncology, Department of Pediatrics (A.P.), Division of Nuclear Medicine, Department of Diagnostic Imaging (A.S., R.V.), and Department of Pediatric Pathology and Laboratory Medicine (R.C.), The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Oscar M Navarro
- From the Departments of Medical Imaging (E.M., M.N., O.M.N., A.S., M.M.S., R.V.), Pediatrics (A.P.), and Laboratory Medicine and Pathobiology (R.C.), University of Toronto, Toronto, Ontario, Canada; and the Department of Diagnostic Imaging (E.M., M.N., O.M.N., A.G., M.M.S.), Division of Pediatric Hematology/Oncology, Department of Pediatrics (A.P.), Division of Nuclear Medicine, Department of Diagnostic Imaging (A.S., R.V.), and Department of Pediatric Pathology and Laboratory Medicine (R.C.), The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Angela Punnett
- From the Departments of Medical Imaging (E.M., M.N., O.M.N., A.S., M.M.S., R.V.), Pediatrics (A.P.), and Laboratory Medicine and Pathobiology (R.C.), University of Toronto, Toronto, Ontario, Canada; and the Department of Diagnostic Imaging (E.M., M.N., O.M.N., A.G., M.M.S.), Division of Pediatric Hematology/Oncology, Department of Pediatrics (A.P.), Division of Nuclear Medicine, Department of Diagnostic Imaging (A.S., R.V.), and Department of Pediatric Pathology and Laboratory Medicine (R.C.), The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Amer Shammas
- From the Departments of Medical Imaging (E.M., M.N., O.M.N., A.S., M.M.S., R.V.), Pediatrics (A.P.), and Laboratory Medicine and Pathobiology (R.C.), University of Toronto, Toronto, Ontario, Canada; and the Department of Diagnostic Imaging (E.M., M.N., O.M.N., A.G., M.M.S.), Division of Pediatric Hematology/Oncology, Department of Pediatrics (A.P.), Division of Nuclear Medicine, Department of Diagnostic Imaging (A.S., R.V.), and Department of Pediatric Pathology and Laboratory Medicine (R.C.), The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Aaryan Gupta
- From the Departments of Medical Imaging (E.M., M.N., O.M.N., A.S., M.M.S., R.V.), Pediatrics (A.P.), and Laboratory Medicine and Pathobiology (R.C.), University of Toronto, Toronto, Ontario, Canada; and the Department of Diagnostic Imaging (E.M., M.N., O.M.N., A.G., M.M.S.), Division of Pediatric Hematology/Oncology, Department of Pediatrics (A.P.), Division of Nuclear Medicine, Department of Diagnostic Imaging (A.S., R.V.), and Department of Pediatric Pathology and Laboratory Medicine (R.C.), The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Rose Chami
- From the Departments of Medical Imaging (E.M., M.N., O.M.N., A.S., M.M.S., R.V.), Pediatrics (A.P.), and Laboratory Medicine and Pathobiology (R.C.), University of Toronto, Toronto, Ontario, Canada; and the Department of Diagnostic Imaging (E.M., M.N., O.M.N., A.G., M.M.S.), Division of Pediatric Hematology/Oncology, Department of Pediatrics (A.P.), Division of Nuclear Medicine, Department of Diagnostic Imaging (A.S., R.V.), and Department of Pediatric Pathology and Laboratory Medicine (R.C.), The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Manohar M Shroff
- From the Departments of Medical Imaging (E.M., M.N., O.M.N., A.S., M.M.S., R.V.), Pediatrics (A.P.), and Laboratory Medicine and Pathobiology (R.C.), University of Toronto, Toronto, Ontario, Canada; and the Department of Diagnostic Imaging (E.M., M.N., O.M.N., A.G., M.M.S.), Division of Pediatric Hematology/Oncology, Department of Pediatrics (A.P.), Division of Nuclear Medicine, Department of Diagnostic Imaging (A.S., R.V.), and Department of Pediatric Pathology and Laboratory Medicine (R.C.), The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Reza Vali
- From the Departments of Medical Imaging (E.M., M.N., O.M.N., A.S., M.M.S., R.V.), Pediatrics (A.P.), and Laboratory Medicine and Pathobiology (R.C.), University of Toronto, Toronto, Ontario, Canada; and the Department of Diagnostic Imaging (E.M., M.N., O.M.N., A.G., M.M.S.), Division of Pediatric Hematology/Oncology, Department of Pediatrics (A.P.), Division of Nuclear Medicine, Department of Diagnostic Imaging (A.S., R.V.), and Department of Pediatric Pathology and Laboratory Medicine (R.C.), The Hospital for Sick Children, Toronto, Ontario, Canada
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Hamad F, Kachouie NN. Potential Impact of Donors’ Factors on Survival Times of Transplanted Hearts and Lungs. TRANSPLANTATION REPORTS 2019. [DOI: 10.1016/j.tpr.2019.100035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Vinkenes E, Nielsen MA, Blaakaer J. Is there evidence for efficacy of human papillomavirus vaccination in solid organ transplant recipients? Eur J Obstet Gynecol Reprod Biol X 2019; 4:100015. [PMID: 31673683 PMCID: PMC6817653 DOI: 10.1016/j.eurox.2019.100015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 03/20/2019] [Accepted: 03/23/2019] [Indexed: 11/25/2022] Open
Abstract
Human papillomavirus (HPV) infection is one of the most common sexually transmitted infections worldwide and is associated with precancerous lesions and cancers of the cervix, vulva, vagina, penis, anus, tonsils and base of the tongue. Several studies show an increased risk of HPV-associated cancers in solid organ transplant recipients (SOTR). The aims of this review are to investigate the evidence of efficacy for the HPV vaccination in transplant recipients and to discuss the known national guidelines. A systematic literature search has been conducted to identify studies where SOTR received the HPV vaccination to evaluate the efficacy of the HPV vaccine on this population. The primary outcome was antibody response against the HPV genotypes included in the vaccines and the secondary outcome was national guidelines recommending HPV vaccination of SOTR. Three cohort studies evaluated immunogenicity. Two studies found suboptimal effect of the HPV vaccine, while an early terminated study detected 100% seropositivity. We have identified four national guidelines in the following countries; United States of America, Canada, Australia and Ireland, along with a recommendation from the World Health Organization (WHO). The results from the three studies were inconclusive due to the small sample sizes and the diverging results. Recommendations of HPV vaccination of SOTR is based on the knowledge about safety and efficiency in the general population and the safety of other inactivated (not live) vaccines in SOTR. Theoretically, the nonavalent vaccine should be recommended as the first choice in SOTR without age- or sex restrictions.
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Affiliation(s)
- Emeline Vinkenes
- Odense University Hospital, Dept. of Obstetrics. & Gyn, Sdr. Boulevard 29, Odense 5000 C, Denmark
| | - Martine A Nielsen
- Odense University Hospital, Dept. of Obstetrics. & Gyn, Sdr. Boulevard 29, Odense 5000 C, Denmark
| | - Jan Blaakaer
- Odense University Hospital, Dept. of Obstetrics. & Gyn, Sdr. Boulevard 29, Odense 5000 C, Denmark
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Zhang Y, Shen S, Zhao G, Xu CF, Zhang HB, Luo YL, Cao ZT, Shi J, Zhao ZB, Lian ZX, Wang J. In situ repurposing of dendritic cells with CRISPR/Cas9-based nanomedicine to induce transplant tolerance. Biomaterials 2019; 217:119302. [PMID: 31271858 DOI: 10.1016/j.biomaterials.2019.119302] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 06/17/2019] [Accepted: 06/24/2019] [Indexed: 12/27/2022]
Abstract
Organ transplantation is the only effective method to treat end-stage organ failure. However, it is continuously plagued by immune rejection, which is mostly caused by T cell-mediated reactions. Dendritic cells (DCs) are professional antigen-presenting cells, and blocking the costimulatory signaling molecule CD40 in DCs inhibits T cell activation and induces transplant tolerance. In this study, to relieve graft rejection, Cas9 mRNA (mCas9) and a guide RNA targeting the costimulatory molecule CD40 (gCD40) were prepared and encapsulated into poly(ethylene glycol)-block-poly(lactide-co-glycolide) (PEG-b-PLGA)-based cationic lipid-assisted nanoparticles (CLAN), denoted CLANmCas9/gCD40. CLAN effectively delivered mCas9/gCD40 into DCs and disrupted CD40 in DCs at the genomic level both in vitro and in vivo. After intravenous injection into an acute mouse skin transplant model, CLANmCas9/gCD40-mediated CD40 disruption significantly inhibited T cell activation, which reduced graft damage and prolonged graft survival. This work provides a promising strategy for reprogramming DCs with nanoparticles carrying the CRISPR/Cas9 system to abate transplant rejection.
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Affiliation(s)
- Yue Zhang
- Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, School of Biomedical Sciences and Engineering, Guangzhou International Campus, South China University of Technology, Guangzhou, 510006, PR China; Hefei National Laboratory for Physical Sciences at the Microscale and School of Life Sciences, University of Science and Technology of China, Hefei, 230027, PR China
| | - Song Shen
- Chronic Disease Laboratory, Institutes for Life Sciences and School of Medicine, South China University of Technology, Guangzhou, 510006, PR China; National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, 510006, PR China
| | - Gui Zhao
- Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, School of Biomedical Sciences and Engineering, Guangzhou International Campus, South China University of Technology, Guangzhou, 510006, PR China; Hefei National Laboratory for Physical Sciences at the Microscale and School of Life Sciences, University of Science and Technology of China, Hefei, 230027, PR China
| | - Cong-Fei Xu
- Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, School of Biomedical Sciences and Engineering, Guangzhou International Campus, South China University of Technology, Guangzhou, 510006, PR China; Chronic Disease Laboratory, Institutes for Life Sciences and School of Medicine, South China University of Technology, Guangzhou, 510006, PR China.
| | - Hou-Bing Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and School of Life Sciences, University of Science and Technology of China, Hefei, 230027, PR China
| | - Ying-Li Luo
- Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, School of Biomedical Sciences and Engineering, Guangzhou International Campus, South China University of Technology, Guangzhou, 510006, PR China; Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, South China University of Technology, Guangzhou, 510006, PR China
| | - Zhi-Ting Cao
- Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, School of Biomedical Sciences and Engineering, Guangzhou International Campus, South China University of Technology, Guangzhou, 510006, PR China
| | - Jia Shi
- Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, School of Biomedical Sciences and Engineering, Guangzhou International Campus, South China University of Technology, Guangzhou, 510006, PR China
| | - Zhi-Bin Zhao
- Chronic Disease Laboratory, Institutes for Life Sciences and School of Medicine, South China University of Technology, Guangzhou, 510006, PR China
| | - Zhe-Xiong Lian
- Chronic Disease Laboratory, Institutes for Life Sciences and School of Medicine, South China University of Technology, Guangzhou, 510006, PR China
| | - Jun Wang
- Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, School of Biomedical Sciences and Engineering, Guangzhou International Campus, South China University of Technology, Guangzhou, 510006, PR China; National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, 510006, PR China; Key Laboratory of Biomedical Engineering of Guangdong Province, and Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, 510006, PR China; Guangzhou Regenerative Medicine and Health Guangdong Laboratory, Guangzhou, 510005, PR China.
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