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Abraha J, Rao P, Morris GP. Modes of assay interference and the effectiveness of serum pretreatment approaches in detection of anti-HLA antibodies. J Clin Pathol 2024; 77:284-290. [PMID: 36600574 DOI: 10.1136/jcp-2022-208371] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 11/30/2022] [Indexed: 12/12/2022]
Abstract
AIMS Several modes of assay interference common to immunoassays affect solid-phase single-antigen bead-based immunoassays (SAB) used to detect antibodies against human leucocyte antigens (HLA). Best practice recommendations include methods to address assay interference, though the clinical impact and optimal approaches are undefined. We sought to evaluate assay interference in HLA SAB to identify an efficient approach for avoiding erroneous results. METHODS Retrospective analysis of 14 059 patient samples tested for anti-HLA antibodies was performed. This included 4685 samples tested prior to implementation of serum pretreatment with EDTA and 4982 samples tested with routine EDTA treatment using the same testing algorithm. An algorithm for efficiently identifying and processing samples with suspected interference was evaluated in a separate cohort of 4392 EDTA-treated samples. RESULTS EDTA serum pretreatment reduced assay interference, but did not eliminate all modes of interference. A protocol for identification and testing of samples with suspected interference facilitated efficient detection of interference while reducing the amount of additional testing required. CONCLUSIONS Our data indicate that a single-method approach is insufficient to address all sources of interference in HLA SAB. A multimodal approach with a proactive screening is a more effective way to minimise risk of erroneous results.
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Affiliation(s)
- Joseph Abraha
- Department of Pathology, University of California San Diego, La Jolla, California, USA
| | - Ping Rao
- Aurora Health Care, Milwaukee, Wisconsin, USA
| | - Gerald P Morris
- Department of Pathology, University of California San Diego, La Jolla, California, USA
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2
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Li F, Gragert L, Giovanni Biagini D, Patel JK, Kobashigawa JA, Trück J, Rodriguez O, Watson CT, Gibb DR, Zhang X, Kransdorf EP. IgM marks persistent IgG anti-human leukocyte antigen antibodies in highly sensitized heart transplant patients. J Heart Lung Transplant 2024; 43:314-323. [PMID: 37793509 DOI: 10.1016/j.healun.2023.09.022] [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: 02/05/2023] [Revised: 09/25/2023] [Accepted: 09/27/2023] [Indexed: 10/06/2023] Open
Abstract
BACKGROUND Sensitization to human leukocyte antigens (HLA) is a persistent problem in heart transplant (HT) candidates. We sought to characterize the anti-HLA antibody and circulating B cell repertoire in a cohort of highly sensitized HT candidates. METHODS We assessed immunoglobulin G (IgG) and immunoglobulin M (IgM) anti-HLA antibodies using Luminex single antigen bead assays in a cohort of 11 highly sensitized (HS; calculated panel reactive antibody ≥ 90%) and 3 mildly sensitized (MS) candidates. We also performed B cell receptor repertoire sequencing (BCRseq) in HS candidates and 33 non-candidate controls. HLA antibody strength was measured by mean fluorescence intensity (MFI). RESULTS We found that IgM anti-HLA antibodies were present in all HS candidates, but with a lower breadth and strength as compared to IgG. When anti-HLA IgG specificities intersected with IgM, binding strength was higher. In contrast, there were IgM but no intersecting IgG specificities for the MS group. In four candidates in the HS group, IgG anti-HLA antibodies decreased in both breadth and strength after HT, but the decrease in strength was smaller if the IgG possessed a specificity that intersected with pre-transplant IgM. BCRseq revealed larger B cell clonotypes in HS candidates but similar diversity as compared to controls. CONCLUSIONS IgM marks IgG anti-HLA antibodies with higher strength before HT and persistence after HT. The presence of IgM intersecting IgG for an anti-HLA specificity may be a useful approach to determine which donor HLA should be avoided for a sensitized candidate.
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Affiliation(s)
- Fang Li
- Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, California
| | - Loren Gragert
- Department of Pathology, Tulane University School of Medicine, New Orleans, Louisiana
| | - D Giovanni Biagini
- Department of Pathology, Tulane University School of Medicine, New Orleans, Louisiana
| | - Jignesh K Patel
- Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California
| | - Jon A Kobashigawa
- Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California
| | - Johannes Trück
- Division of Immunology, University Children's Hospital and Children's Research Center, University of Zurich (UZH), Zurich, Switzerland
| | - Oscar Rodriguez
- Department of Biochemistry and Molecular Genetics, University of Louisville, Louisville, Kentucky
| | - Corey T Watson
- Department of Biochemistry and Molecular Genetics, University of Louisville, Louisville, Kentucky
| | - David R Gibb
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California
| | - Xiaohai Zhang
- Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, California
| | - Evan P Kransdorf
- Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California.
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Battle R, Pritchard D, Peacock S, Hastie C, Worthington J, Jordan S, McCaughlan JA, Barnardo M, Cope R, Collins C, Diaz-Burlinson N, Rosser C, Foster L, Kallon D, Shaw O, Briggs D, Turner D, Anand A, Akbarzad-Yousefi A, Sage D. BSHI and BTS UK guideline on the detection of alloantibodies in solid organ (and islet) transplantation. Int J Immunogenet 2023; 50 Suppl 2:3-63. [PMID: 37919251 DOI: 10.1111/iji.12641] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 10/04/2023] [Indexed: 11/04/2023]
Abstract
Solid organ transplantation represents the best (and in many cases only) treatment option for patients with end-stage organ failure. The effectiveness and functioning life of these transplants has improved each decade due to surgical and clinical advances, and accurate histocompatibility assessment. Patient exposure to alloantigen from another individual is a common occurrence and takes place through pregnancies, blood transfusions or previous transplantation. Such exposure to alloantigen's can lead to the formation of circulating alloreactive antibodies which can be deleterious to solid organ transplant outcome. The purpose of these guidelines is to update to the previous BSHI/BTS guidelines 2016 on the relevance, assessment, and management of alloantibodies within solid organ transplantation.
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Affiliation(s)
- Richard Battle
- Scottish National Blood Transfusion Service, Edinburgh, UK
| | | | - Sarah Peacock
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | | | | | - Sue Jordan
- National Blood Service Tooting, London, UK
| | | | - Martin Barnardo
- Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Rebecca Cope
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | | | | | | | - Luke Foster
- Birmingham Blood Donor Centre, Birmingham, UK
| | | | - Olivia Shaw
- Guy's and St Thomas' NHS Foundation Trust, London, UK
| | | | - David Turner
- Scottish National Blood Transfusion Service, Edinburgh, UK
| | - Arthi Anand
- Imperial College Healthcare NHS Trust, London, UK
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Risk stratification of patients listed for heart transplantation while supported with extracorporeal membrane oxygenation. J Thorac Cardiovasc Surg 2023; 165:711-720. [PMID: 34167814 DOI: 10.1016/j.jtcvs.2021.05.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 05/03/2021] [Accepted: 05/17/2021] [Indexed: 01/18/2023]
Abstract
OBJECTIVES Extracorporeal membrane oxygenation (ECMO) is used to support patients in severe cardiogenic shock. In the absence of recovery, these patients may need to be listed for heart transplant (HT), which offers the best long-term prognosis. However, posttransplantation mortality is significantly elevated in patients who receive ECMO. The objective of the present study was to describe and risk-stratify different profiles of patients listed for HT supported by ECMO. METHODS Patients listed for HT in the United Network for Organ Sharing database were analyzed. The primary outcome was 1-year survival and was assessed in patients bridged to transplant with ECMO (ECMOBTT) and patients who were previously supported on ECMO but had it removed before HT (ECMOREMOVED). RESULTS Among 65,636 adult candidates listed for HT (between 2001 and 2017), 712 were supported on ECMO, 292 of whom (41%) underwent HT (ECMOBTT, n = 202; ECMOREMOVED, n = 90). Most of the patients with ECMOREMOVED were transplanted with a ventricular assist device. In ECMOBTT, recipient age (each 10-year increase), time on the waitlist (both defined as minor risk factors), need for dialysis, and need for mechanical ventilation (both defined as major risk factors) were independent predictors of mortality. ECMOREMOVED and ECMOBTT with no risk factors showed 1-year survival comparable to that in patients who were never supported on ECMO. Compared with patients who were never on ECMO, patients in ECMOBTT group with minor risk factors, 1 major risk factor, and 2 major risk factors had ~2-, ~5-, and >10-fold greater 1-year mortality, respectively (P < .05). CONCLUSIONS The HT recipients in the ECMOREMOVED and ECMOBTT groups with no risk factors showed similar survival as the HT recipients who were never supported on ECMO. In the ECMOBTT group, posttransplantation mortality increased significantly with increasing risk factors.
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Kilcoyne MF, Huckaby LV, Hashmi Z, Witer L, Pope N, Houston BA, Inampudi C, Tedford RJ, Kilic A. The HeartMate 3 left ventricular assist device as a strategy to bridge to transplant. J Card Surg 2022; 37:4713-4718. [PMID: 36321713 DOI: 10.1111/jocs.17063] [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: 03/31/2022] [Revised: 08/02/2022] [Accepted: 10/15/2022] [Indexed: 12/31/2022]
Abstract
PURPOSE Recent changes in the market for left ventricular assist devices have resulted in the HeartMate 3 (HM3) being the only commercially-available device. This study evaluates the outcomes of patients with a HM3 waitlisted for and undergoing orthotopic heart transplantation (OHT). METHODS Patients waitlisted for isolated OHT with a HM3 or undergoing OHT after bridge-to-transplant (BTT) with a HM3 between 2015 and 2021 were identified from the UNOS registry and included in this study. Propensity matching was used to compare outcomes of BTT-HM3 versus primary OHT. RESULTS A total of 1321 patients supported with a HM3 underwent OHT during our study period. Unadjusted 30-day, 90-day, and 1-year survival following OHT in the BTT-HM3 cohort was 96.5%, 94.4%, and 90.7%, respectively. In propensity-matched analysis, 1103 BTT-HM3 patients were compared with 1103 primary OHT patients. Rates of post-OHT stroke were higher in the BTT-HM3 group (4.4% vs. 2.0%, p = .001). The BTT-HM3 group had lower 30-day survival (96.2% vs. 97.4%, p = .033) although 90-day (94.2% vs. 95.3%, p = .103) and 1-year survival (90.4% vs. 91.7%, p = .216) were comparable. A total of 1251 patients were supported with a HM3 at the time of OHT listing during the study period. At the time of this analysis, 60 (4.5%) remained on the waitlist, 991 (75.0%) underwent OHT, and 119 (9.0%) died or clinically deteriorated with waitlist removal. CONCLUSIONS The HM3 is a viable method for BTT with acceptable waitlist outcomes. Although 1-year survival is comparable to primary OHT, early outcomes are worse, suggesting that refinement of patient selection and perioperative management is prudent to optimizing outcomes.
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Affiliation(s)
- Maxwell F Kilcoyne
- Division of Cardiothoracic Surgery, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Lauren V Huckaby
- Department of Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
| | - Zubair Hashmi
- Division of Cardiothoracic Surgery, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Lucas Witer
- Division of Cardiothoracic Surgery, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Nicolas Pope
- Division of Cardiothoracic Surgery, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Brian A Houston
- Division of Cardiology, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Chakradhari Inampudi
- Division of Cardiology, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Ryan J Tedford
- Division of Cardiology, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Arman Kilic
- Division of Cardiothoracic Surgery, Medical University of South Carolina, Charleston, South Carolina, USA
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Zhou AL, Etchill EW, Shou BL, Whitbread JJ, Barbur I, Giuliano KA, Kilic A. Outcomes after heart transplantation in patients who have undergone a bridge-to-bridge strategy. JTCVS OPEN 2022; 12:255-268. [PMID: 36590736 PMCID: PMC9801290 DOI: 10.1016/j.xjon.2022.08.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 08/13/2022] [Accepted: 08/29/2022] [Indexed: 01/04/2023]
Abstract
Objectives We compared posttransplant outcomes between patients bridged from temporary mechanical circulatory support to durable left ventricular assist device before transplant (bridge-to-bridge [BTB] strategy) and patients bridged from temporary mechanical circulatory support directly to transplant (bridge-to-transplant [BTT] strategy). Methods We identified adult heart transplant recipients in the Organ Procurement and Transplantation Network database between 2005 and 2020 who were supported with extracorporeal membrane oxygenation, intra-aortic balloon pump, or temporary ventricular assist device as a BTB or BTT strategy. Kaplan-Meier survival analysis and Cox regressions were used to assess 1-year, 5-year, and 10-year survival. Posttransplant length of stay and complications were compared as secondary outcomes. Results In total, 201 extracorporeal membrane oxygenation (61 BTB, 140 BTT), 1385 intra-aortic balloon pump (460 BTB, 925 BTT), and 234 temporary ventricular assist device (75 BTB, 159 BTT) patients were identified. For patients supported with extracorporeal membrane oxygenation, intra-aortic balloon pump, or temporary ventricular assist device, there were no differences in survival between BTB and BTT at 1 and 5 years posttransplant, as well as 10 years posttransplant even after adjusting for baseline characteristics. The extracorporeal membrane oxygenation BTB group had greater rates of acute rejection (32.8% vs 13.6%; P = .002) and lower rates of dialysis (1.6% vs 21.4%; P < .001). For intra-aortic balloon pump and temporary ventricular assist device patients, there were no differences in posttransplant length of stay, acute rejection, airway compromise, stroke, dialysis, or pacemaker insertion between BTB and BTT recipients. Conclusions BTB patients have similar short- and midterm posttransplant survival as BTT patients. Future studies should continue to investigate the tradeoff between prolonged temporary mechanical circulatory support versus transitioning to durable mechanical circulatory support.
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Key Words
- BTB, bridge-to-bridge
- BTT, bridge-to-transplant
- CO, cardiac output
- ECMO, extracorporeal membrane oxygenation
- IABP, intra-aortic balloon pump
- LVAD, left ventricular assist device
- MCS, mechanical circulatory support
- OPTN, Organ Procurement and Transplantation Network
- PA, pulmonary artery
- PCWP, pulmonary capillary wedge pressure
- TAH, total artificial heart
- UNOS, United Network for Organ Sharing
- extracorporeal membrane oxygenation
- heart transplant
- intra-aortic balloon pump
- mPAP, mean pulmonary arterial pressure
- mechanical circulatory support
- tVAD, temporary ventricular assist device
- transplant outcomes
- ventricular assist devices
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Affiliation(s)
- Alice L. Zhou
- Johns Hopkins University School of Medicine, Baltimore, Md
| | - Eric W. Etchill
- Division of Cardiac Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Md
| | | | | | - Iulia Barbur
- Johns Hopkins University School of Medicine, Baltimore, Md
| | - Katherine A. Giuliano
- Division of Cardiac Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Md
| | - Ahmet Kilic
- Division of Cardiac Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Md
- Address for reprints: Ahmet Kilic, MD, Division of Cardiac Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Sheikh Zayed Tower, Suite 7107, 1800 Orleans St, Baltimore, MD 21287.
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7
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De novo human leukocyte antigen allosensitization patterns in patients bridged to heart transplantation using left ventricular assist devices. Transpl Immunol 2022; 72:101567. [PMID: 35278648 DOI: 10.1016/j.trim.2022.101567] [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: 10/26/2021] [Revised: 02/24/2022] [Accepted: 02/28/2022] [Indexed: 02/03/2023]
Abstract
INTRODUCTION We examined the impact and time course of de novo human leukocyte antigen (HLA) allosensitization following left ventricular assist device (LVAD) implantation. METHODS AND RESULTS Forty patients had a calculated panel reactive antibody (cPRA) prior to LVAD surgery between January 2014 and December 2018. Of these patients, we retrospectively studied 33 patients who had pre-LVAD cPRA <10%. De novo allosensitization was defined as cPRA ≥10% within 3 months following LVAD surgery, and "persistent allosensitization" was defined as cPRA ≥10% at time of heart transplant or death. One-third (11/33) of our cohort developed de novo allosensitization within 3-months post-LVAD. Median duration of follow-up during LVAD support was 588 days (IQR 337-1071 days), or approximately 19 months. In an adjusted, multivariable analysis, female sex remained associated with de novo allosensitization (adjusted odds ratio [95%CI]: 11 (1.4-85), P = 0.026). De novo allosensitization was subsequently associated with persistent allosensitization (P = 0.024). Both axial-flow and centrifugal-flow LVADs had similar rates of allosensitization. Compared to those with no allosensitization, patients with de novo allosensitization did not appear to have inferior post-transplant outcomes of death or treated rejection. CONCLUSION In our single-center experience, one-third of patients developed de novo allosensitization which did not appear to associate with inferior post-transplant outcomes. Female sex was associated with de novo allosensitization.
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Immohr MB, Aubin H, Erbel-Khurtsidze S, Dalyanoglu H, Bruno RR, Westenfeld R, Tudorache I, Akhyari P, Boeken U, Lichtenberg A. Impact of pretransplant left ventricular assist device support duration on outcome after heart transplantation. Interact Cardiovasc Thorac Surg 2021; 34:462-469. [PMID: 34647129 PMCID: PMC8860434 DOI: 10.1093/icvts/ivab265] [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: 05/04/2021] [Revised: 08/19/2021] [Accepted: 08/27/2021] [Indexed: 01/13/2023] Open
Abstract
OBJECTIVES Heart transplantation after left ventricular assist device (LVAD) implantation remains challenging. It is still unclear whether its support duration impacts the outcome after transplantation.
METHODS All patients undergoing heart transplantation between 2010 and 2021 at a single department after previous left ventricular assistance were retrospectively reviewed and divided into 4 different study groups with regard to the duration of LVAD support to examine the impact on the postoperative morbidity and mortality. RESULTS A total of n = 198 patients were included and assigned to the 4 study groups (group 1: <90 days, n = 14; group 2: 90 days to 1 year, n = 31; group 3: 1–2 years, n = 29; group 4: >2 years, n = 24). Although there were no differences between the 4 groups concerning relevant mismatch between the recipients and donors, the incidence of primary graft dysfunction was numerically increased in patients with the shortest support duration, and also those patients with >1 year of support (group 1: 35.7%, group 2: 25.8%, group 3: 41.4%, group 4: 37.5%, P = 0.63). The incidence of acute graft rejection was by trend increased in patients of group 1 (group 1: 28.6%, group 2: 3.3%, group 3: 7.1%, group 4: 12.5%, P = 0.06). Duration of LVAD support did not impact on perioperative adverse events (infections, P = 0.79; acute kidney injury, P = 0.85; neurological events, P = 0.74; thoracic bleeding, P = 0.61), neither on postoperative survival (1-year survival: group 1: 78.6%, group 2: 66.7%, group 3: 80.0%, group 4: 72.7%, P = 0.74). CONCLUSION We cannot identify a significant impact of the duration of pretransplant LVAD support on postoperative outcome; therefore, we cannot recommend a certain timeframe for transplantation of LVAD patients.
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Affiliation(s)
- Moritz Benjamin Immohr
- Department of Cardiac Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Hug Aubin
- Department of Cardiac Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Sophiko Erbel-Khurtsidze
- Department of Cardiac Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Hannan Dalyanoglu
- Department of Cardiac Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Raphael Romano Bruno
- Department of Cardiology, Pulmonology and Angiology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Ralf Westenfeld
- Department of Cardiology, Pulmonology and Angiology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Igor Tudorache
- Department of Cardiac Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Payam Akhyari
- Department of Cardiac Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Udo Boeken
- Department of Cardiac Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Artur Lichtenberg
- Department of Cardiac Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
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Chaidaroglou A, Armenis I, Gkouziouta A, Bonios MJ, Kogerakis N, Fragoulis S, Leontiadis E, Zarkalis D, Stavridis G, Kaklamanis L, Adamopoulos S, Degiannis D. The effect of paracorporeal pulsatile biventricular assist devices on allosensitization in adults: A comparison with left ventricular assist devices. Transpl Immunol 2021; 69:101477. [PMID: 34600071 DOI: 10.1016/j.trim.2021.101477] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 09/27/2021] [Accepted: 09/27/2021] [Indexed: 11/19/2022]
Abstract
Ventricular assist devices (VADs) have been associated with the development of anti-HLA antibodies ('allosensitization'), but data on devices providing biventricular support in adults are limited. We sought to characterize differences in anti-HLA antibody formation in adult patients receiving left- (LVAD) versus biventricular- (BiVAD) assist devices as bridge to transplantation (BTT) by retrospectively reviewing the records of adult patients who have undergone VAD implantation at our institution. We assessed 82 patients supported with a pulsatile-flow paracorporeal BiVAD and compared them with 40 patients receiving LVAD till 2018. Forty-eight (58.5%) of the BiVAD and 23 (57.5%) of the LVAD patients were eventually transplanted (p = 0.91) with an average time to transplantation 559 and 598 days, respectively (p = 0.73). Evidence of sensitization pre-VAD was found in 11.0% of the BiVAD patients and 15.0% of the LVAD ones (p = 0.53); these percentages rose to 43.9% (p < 0.001) and 40.0% (p = 0.01), respectively. The post-VAD sensitization status was not significantly different between the BiVAD and the LVAD group (p = 0.68). De novo sensitization was comparable between the two groups (p = 0.55). Post-transplantation outcomes regarding rejections and cardiac allograft vasculopathy were also similar. Conclusively, BiVAD- and LVAD- induced allosensitization do not appear to differ significantly.
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Affiliation(s)
- Antigoni Chaidaroglou
- Department of Molecular Immunopathology and Histocompatibility, Onassis Cardiac Surgery Center, Greece
| | - Iakovos Armenis
- Department of Heart Transplantation and Mechanical Circulatory Support, Onassis Cardiac Surgery Center, Greece.
| | - Angeliki Gkouziouta
- Department of Heart Transplantation and Mechanical Circulatory Support, Onassis Cardiac Surgery Center, Greece
| | - Michael J Bonios
- Department of Heart Transplantation and Mechanical Circulatory Support, Onassis Cardiac Surgery Center, Greece
| | - Nektarios Kogerakis
- Department of Heart Transplantation and Mechanical Circulatory Support, Onassis Cardiac Surgery Center, Greece
| | - Socrates Fragoulis
- Department of Heart Transplantation and Mechanical Circulatory Support, Onassis Cardiac Surgery Center, Greece
| | - Evangelos Leontiadis
- Department of Heart Transplantation and Mechanical Circulatory Support, Onassis Cardiac Surgery Center, Greece
| | - Dimitrios Zarkalis
- Department of Heart Transplantation and Mechanical Circulatory Support, Onassis Cardiac Surgery Center, Greece
| | - Georgios Stavridis
- Department of Heart Transplantation and Mechanical Circulatory Support, Onassis Cardiac Surgery Center, Greece
| | | | - Stamatis Adamopoulos
- Department of Heart Transplantation and Mechanical Circulatory Support, Onassis Cardiac Surgery Center, Greece
| | - Dimitrios Degiannis
- Department of Molecular Immunopathology and Histocompatibility, Onassis Cardiac Surgery Center, Greece
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10
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Habal MV. Current Desensitization Strategies in Heart Transplantation. Front Immunol 2021; 12:702186. [PMID: 34504489 PMCID: PMC8423343 DOI: 10.3389/fimmu.2021.702186] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 07/26/2021] [Indexed: 01/03/2023] Open
Abstract
Heart transplant candidates sensitized to HLA antigens wait longer for transplant, are at increased risk of dying while waiting, and may not be listed at all. The increasing prevalence of HLA sensitization and limitations of current desensitization strategies underscore the urgent need for a more effective approach. In addition to pregnancy, prior transplant, and transfusions, patients with end-stage heart failure are burdened with unique factors placing them at risk for HLA sensitization. These include homograft material used for congenital heart disease repair and left ventricular assist devices (LVADs). Moreover, these risks are often stacked, forming a seemingly insurmountable barrier in some cases. While desensitization protocols are typically implemented uniformly, irrespective of the mode of sensitization, the heterogeneity in success and post-transplant outcomes argues for a more tailored approach. Achieving this will require progress in our understanding of the immunobiology underlying the innate and adaptive immune response to these varied allosensitizing exposures. Further attention to B cell activation, memory, and plasma cell differentiation is required to establish methods that durably abrogate the anti-HLA antibody response before and after transplant. The contribution of non-HLA antibodies to the net state of sensitization and the potential implications for graft longevity also remain to be comprehensively defined. The aim of this review is to first bring forth select issues unique to the sensitized heart transplant candidate. The current literature on desensitization in heart transplantation will then be summarized providing context within the immune response. Building on this, newer approaches with therapeutic potential will be discussed emphasizing the importance of not only addressing the short-term pathogenic consequences of circulating HLA antibodies, but also the need to modulate alloimmune memory.
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Affiliation(s)
- Marlena V. Habal
- Department of Medicine, Division of Cardiology, Columbia University Irving Medical Center, Columbia University, New York, NY, United States
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11
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Choi AY, Manook M, Olaso D, Ezekian B, Park J, Freischlag K, Jackson A, Knechtle S, Kwun J. Emerging New Approaches in Desensitization: Targeted Therapies for HLA Sensitization. Front Immunol 2021; 12:694763. [PMID: 34177960 PMCID: PMC8226120 DOI: 10.3389/fimmu.2021.694763] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 05/24/2021] [Indexed: 01/11/2023] Open
Abstract
There is an urgent need for therapeutic interventions for desensitization and antibody-mediated rejection (AMR) in sensitized patients with preformed or de novo donor-specific HLA antibodies (DSA). The risk of AMR and allograft loss in sensitized patients is increased due to preformed DSA detected at time of transplant or the reactivation of HLA memory after transplantation, causing acute and chronic AMR. Alternatively, de novo DSA that develops post-transplant due to inadequate immunosuppression and again may lead to acute and chronic AMR or even allograft loss. Circulating antibody, the final product of the humoral immune response, has been the primary target of desensitization and AMR treatment. However, in many cases these protocols fail to achieve efficient removal of all DSA and long-term outcomes of patients with persistent DSA are far worse when compared to non-sensitized patients. We believe that targeting multiple components of humoral immunity will lead to improved outcomes for such patients. In this review, we will briefly discuss conventional desensitization methods targeting antibody or B cell removal and then present a mechanistically designed desensitization regimen targeting plasma cells and the humoral response.
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Affiliation(s)
| | | | | | | | | | | | | | - Stuart Knechtle
- Duke Transplant Center, Department of Surgery, Duke University Medical Center, Durham, NC, United States
| | - Jean Kwun
- Duke Transplant Center, Department of Surgery, Duke University Medical Center, Durham, NC, United States
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Lorts A, Conway J, Schweiger M, Adachi I, Amdani S, Auerbach SR, Barr C, Bleiweis MS, Blume ED, Burstein DS, Cedars A, Chen S, Cousino-Hood MK, Daly KP, Danziger-Isakov LA, Dubyk N, Eastaugh L, Friedland-Little J, Gajarski R, Hasan A, Hawkins B, Jeewa A, Kindel SJ, Kogaki S, Lantz J, Law SP, Maeda K, Mathew J, May LJ, Miera O, Murray J, Niebler RA, O'Connor MJ, Özbaran M, Peng DM, Philip J, Reardon LC, Rosenthal DN, Rossano J, Salazar L, Schumacher KR, Simpson KE, Stiller B, Sutcliffe DL, Tunuguntla H, VanderPluym C, Villa C, Wearden PD, Zafar F, Zimpfer D, Zinn MD, Morales IRD, Cowger J, Buchholz H, Amodeo A. ISHLT consensus statement for the selection and management of pediatric and congenital heart disease patients on ventricular assist devices Endorsed by the American Heart Association. J Heart Lung Transplant 2021; 40:709-732. [PMID: 34193359 DOI: 10.1016/j.healun.2021.04.015] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 04/22/2021] [Indexed: 01/17/2023] Open
Affiliation(s)
- Angela Lorts
- Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio.
| | | | - Martin Schweiger
- Universitäts-Kinderspitals Zürich - Herzchirurgie, Zurich, Switzerland
| | - Iki Adachi
- Texas Children's Hospital, Houston, Texas
| | | | - Scott R Auerbach
- Anschutz Medical Campus, Children's Hospital of Colorado, University of Colorado Denver, Aurora, Colorado
| | - Charlotte Barr
- The Royal Children's Hospital, Victoria Melbourne, Australia
| | - Mark S Bleiweis
- Shands Children's Hospital, University of Florida Health, Gainesville, Florida
| | | | | | - Ari Cedars
- Children's Health, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Sharon Chen
- Stanford Children's Health and Lucile Packard Children's Hospital, Palo Alto, California
| | | | - Kevin P Daly
- Boston Children's Hospital, Boston, Massachusetts
| | - Lara A Danziger-Isakov
- Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio
| | - Nicole Dubyk
- Stollery Children's Hospital, Edmonton, Alberta, Canada
| | - Lucas Eastaugh
- The Royal Children's Hospital, Victoria Melbourne, Australia
| | | | | | - Asif Hasan
- Freeman Hospital, Newcastle upon Tyne, UK
| | - Beth Hawkins
- Boston Children's Hospital, Boston, Massachusetts
| | - Aamir Jeewa
- The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Steven J Kindel
- Department of Pediatrics, Medical College of Wisconsin and Herma Heart Institute, Children's Hospital of Wisconsin, Milwaukee, Winscoin
| | | | - Jodie Lantz
- Children's Health, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Sabrina P Law
- Morgan Stanley Children's Hospital of New York Presbyterian, New York, New York
| | - Katsuhide Maeda
- Stanford Children's Health and Lucile Packard Children's Hospital, Palo Alto, California
| | - Jacob Mathew
- The Royal Children's Hospital, Victoria Melbourne, Australia
| | | | | | - Jenna Murray
- Stanford Children's Health and Lucile Packard Children's Hospital, Palo Alto, California
| | - Robert A Niebler
- Department of Pediatrics, Medical College of Wisconsin and Herma Heart Institute, Children's Hospital of Wisconsin, Milwaukee, Winscoin
| | | | | | - David M Peng
- C.S. Mott Children's Hospital, University of Michigan, Ann Arbor, Michigan
| | - Joseph Philip
- Shands Children's Hospital, University of Florida Health, Gainesville, Florida
| | | | - David N Rosenthal
- Stanford Children's Health and Lucile Packard Children's Hospital, Palo Alto, California
| | - Joseph Rossano
- Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | | | - Kurt R Schumacher
- C.S. Mott Children's Hospital, University of Michigan, Ann Arbor, Michigan
| | | | | | - David L Sutcliffe
- Children's Health, University of Texas Southwestern Medical Center, Dallas, Texas
| | | | | | - Chet Villa
- Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio
| | | | - Farhan Zafar
- Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio
| | | | - Matthew D Zinn
- Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania
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13
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Sriwattanakomen R, Xu Q, Demehin M, Shullo MA, Mangiola M, Hickey GW, Sciortino CM, Horn ET, Keebler ME, Zeevi A. Impact of carfilzomib-based desensitization on heart transplantation of sensitized candidates. J Heart Lung Transplant 2021; 40:595-603. [PMID: 33785250 DOI: 10.1016/j.healun.2021.03.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 02/14/2021] [Accepted: 03/02/2021] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Allosensitization in heart transplant candidates is associated with longer transplant wait times and post-transplant complications. We summarize our experience with desensitization using carfilzomib, an irreversible proteasome inhibitor that causes plasma cell apoptosis. METHODS One cycle of desensitization consisted of plasmapheresis and carfilzomib 20 mg/m2 on days 1, 2, 8, 9, 15, and 16 with intravenous immune globulin 2 g/kg after carfilzomib on day 16. Patients underwent repeat cycles as indicated. We compare calculated panel-reactive antibody (cPRA) for neat combined Class I and II IgG and C1q pre- and post-treatment using a cutoff for cPRA entry of ≥ 4000 and 500 MFI, respectively. RESULTS From June 2013 to October 2019, 9 patients underwent 20 cycles of carfilzomib-based desensitization. Each cycle resulted in an average cPRA decrease of 24% (95% CI: 6-42) for IgG and 36% (95% CI: 17-55) for C1q. From treatment start to finish, mean cPRA fell from 76% to 40% (p = 0.01) for IgG and 56% to 4% (p = 0.017) for C1q. Six of 9 patients have been transplanted with 5 of the transplanted hearts crossing preoperative donor-specific antibodies. During a median follow-up of 35.1 months, all transplanted patients have survived with only 1 occurrence of treated rejection. Side effects of desensitization included acute kidney injury (67%) and thrombocytopenia (33%) with all episodes self-resolving. CONCLUSIONS A carfilzomib-based desensitization strategy among heart transplant candidates reduces the level of HLA antibodies and complement binding, facilitates successful transplantation, and is associated with excellent outcomes at 3 years.
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Affiliation(s)
| | - Qingyong Xu
- Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Moses Demehin
- University of Maryland Medical Center, Baltimore, Maryland
| | | | | | - Gavin W Hickey
- Cardiology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | | | - Edward T Horn
- Pharmacy and Therapeutics, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Mary E Keebler
- Cardiology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Adriana Zeevi
- Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania
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14
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Aziz F, Tiwari A, Patel H, Chauhan R. Pretransplant histocompatibility testing algorithm: Laboratory and clinical approach in the Indian context. INDIAN JOURNAL OF TRANSPLANTATION 2021. [DOI: 10.4103/ijot.ijot_82_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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15
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Bakir NH, Finnan MJ, MacGregor RM, Schilling JD, Ewald GA, Kotkar KD, Itoh A, Damiano RJ, Moon MR, Masood MF. Cardiac allograft rejection in the current era of continuous flow left ventricular assist devices. J Thorac Cardiovasc Surg 2020; 163:124-134.e8. [PMID: 33012541 DOI: 10.1016/j.jtcvs.2020.06.142] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 05/28/2020] [Accepted: 06/08/2020] [Indexed: 01/19/2023]
Abstract
OBJECTIVE Left ventricular assist device (LVAD) implantation has been shown to increase allosensitization before orthotopic heart transplantation, but the influence of LVAD support on posttransplant rejection is controversial. This study examines the postoperative incidence of acute cellular rejection (ACR) in patients bridged with continuous flow LVAD (CF-LVAD) relative to primary transplant (Primary Tx). METHODS All patients who underwent orthotopic heart transplantation at our institution between July 2006 and March 2019 were retrospectively reviewed (n = 395). Patients were classified into Primary Tx (n = 145) and CF-LVAD (n = 207) groups. Propensity score matching on 13 covariates implemented a 0.1 caliper logistic model with nearest neighbor 1:1 matching. Development of moderate to severe (ie, 2R/3R) rejection was evaluated using a competing risks model. Potential predictors of 2R/3R ACR were evaluated using Fine-Gray regression on the marginal subdistribution hazard. RESULTS Propensity score matching yielded 122 patients in each group (n = 244). At 12 and 24 months, the cumulative incidence of 2R/3R ACR was 17% and 23% for the CF-LVAD group and 26% and 31%, respectively, for the Primary Tx group (P = .170). CF-LVAD was not predictive of 2R/3R rejection on multivariable Fine-Gray regression (subdistribution hazard ratio, 0.73; 95% confidence interval, 0.40-1.33; P = .301). There was no difference in the 5-year incidence of antibody mediated rejection (10% [n = 12] vs 9% [n = 11]; P = .827). CONCLUSIONS After adjusting for covariates, CF-LVAD was not associated with an increased risk of moderate to severe ACR during the 24 months after cardiac transplantation. Further investigation is warranted with larger cohorts, but CF-LVAD may have minimal influence on posttransplant ACR.
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Affiliation(s)
- Nadia H Bakir
- Division of Cardiothoracic Surgery, Department of Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, Mo
| | - Michael J Finnan
- Division of Cardiothoracic Surgery, Department of Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, Mo
| | - Robert M MacGregor
- Division of Cardiothoracic Surgery, Department of Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, Mo
| | - Joel D Schilling
- Cardiovascular Division, Department of Medicine, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, Mo; Department of Pathology and Immunology, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, Mo
| | - Gregory A Ewald
- Cardiovascular Division, Department of Medicine, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, Mo
| | - Kunal D Kotkar
- Division of Cardiothoracic Surgery, Department of Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, Mo
| | - Akinobu Itoh
- Division of Cardiothoracic Surgery, Department of Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, Mo
| | - Ralph J Damiano
- Division of Cardiothoracic Surgery, Department of Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, Mo
| | - Marc R Moon
- Division of Cardiothoracic Surgery, Department of Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, Mo
| | - Muhammad F Masood
- Division of Cardiothoracic Surgery, Department of Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, Mo.
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16
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Transplant Outcomes in Destination Therapy Left Ventricular Assist Device Patients. ASAIO J 2020; 66:394-398. [DOI: 10.1097/mat.0000000000001016] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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17
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Abstract
PURPOSE OF REVIEW Antibody-mediated rejection (AMR) is a major contributor of impaired long-term survival after heart transplantation (HTx). The presence of circulating donor-specific antihuman leukocyte antigen (HLA) antibodies (DSAs) is considered as a mandatory criterion for AMR after HTx. DSA are known prognostic biomarkers of outcome, for example, recipients with de-novo DSA have a three-fold increased risk of mortality. RECENT FINDINGS Although the awareness of the impact and prognosis of DSA on the survival has been increased in the HTx community over the last decade, the management of DSA pre and posttransplant varies among centers and is mainly based on the experience of transplant physicians. Thus, firm consensus strategies for each HTx recipient should be established by a center advisory board of experts in the field of HLA genetics, transplantation immunology, and HTx to evaluate the immunological risk preoperatively and also continuously during the posttransplant course. Consequently, the recent advances of invasive and noninvasive diagnostic tools should be applied, according to the risk, laboratory findings, and clinical events of the recipient. Such individual strategy will result in tailored therapeutic options. SUMMARY Novel standards for the management of DSA in HTx recipients on the basis of an interdisciplinary approach of experts will improve diagnostics for personalized medicine.
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18
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Elkind J, Sobczyk J, Ostberg-Braun O, Silva Enciso J, Adler E, Morris GP. Factors influencing transfusion-associated HLA sensitization in patients bridged to heart transplantation using ventricular assist device. Clin Transplant 2019; 34:e13772. [PMID: 31845395 DOI: 10.1111/ctr.13772] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 11/29/2019] [Accepted: 12/09/2019] [Indexed: 02/02/2023]
Abstract
BACKGROUND Bridging heart failure patients with mechanical ventricular assist devices (VAD) enables access to transplantation. However, VAD is associated with increased risk for anti-HLA antibodies associated with rejection of subsequent allografts. Factors determining alloantibody formation in these patients remain undefined. METHODS We performed a single-center retrospective cohort study of 164 patients undergoing heart transplantation from 2014 to 2017. Medical records including use of VAD, transfused blood products, anti-HLA antibody testing, crossmatch, and time to transplant were evaluated. RESULTS Patients received an average of 13.8 red blood cell and 1.9 single-donor platelet units associated with VAD. There was a 28.7% increase in the incidence of anti-HLA antibodies after VAD. Development of anti-HLA antibodies did not correlate with volume or type of blood products, but with pre-VAD HLA sensitization status; relative risk of new alloantibodies in patients with pre-VAD antibodies was 3.5-fold higher than those without prior antibodies (P = .008). Development of new anti-HLA antibodies was associated with an increased time to transplant (169 vs 330 days, P = .013). CONCLUSIONS Our findings indicate that the presence of anti-HLA antibodies pre-VAD was the most significant risk factor for developing additional antibodies post-VAD, suggesting that a subset of patients may be predisposed to alloantibody formation.
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Affiliation(s)
- Jae Elkind
- Department of Pathology, University of California, San Diego, La Jolla, CA, USA
| | - Juliana Sobczyk
- Department of Pathology, University of California, San Diego, La Jolla, CA, USA
| | - Oscar Ostberg-Braun
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Jorge Silva Enciso
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Eric Adler
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Gerald P Morris
- Department of Pathology, University of California, San Diego, La Jolla, CA, USA
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19
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Desensitization in the Era of Precision Medicine: Moving From the Bench to Bedside. Transplantation 2019; 103:1574-1581. [DOI: 10.1097/tp.0000000000002737] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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20
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Suarez-Pierre A, Kilic A. Surgical considerations for cardiac allograft rejection. Cardiovasc Pathol 2019; 42:59-63. [PMID: 31351216 DOI: 10.1016/j.carpath.2019.06.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 06/24/2019] [Accepted: 06/25/2019] [Indexed: 01/06/2023] Open
Abstract
This article reviews the surgical considerations of cardiac allograft rejection after heart transplantation and describes current treatment modalities for the failing graft. Cardiac allograft rejection can be a moribund diagnosis, especially when it is acute and high grade. It is broadly categorized into hyperacute, acute cellular, and antibody-mediated rejection. Treatment includes a multitude of medical and immunomodulation therapies for graft recovery. Severe rejection requires mechanical circulatory support for hemodynamic stability to maintain end-organ function. Retransplantation for graft loss is the ultimate therapy; however, it portends poor outcomes.
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Affiliation(s)
- Alejandro Suarez-Pierre
- Division of Cardiac Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Ahmet Kilic
- Division of Cardiac Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD.
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21
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Colvin MM, Cook JL, Chang PP, Hsu DT, Kiernan MS, Kobashigawa JA, Lindenfeld J, Masri SC, Miller DV, Rodriguez ER, Tyan DB, Zeevi A. Sensitization in Heart Transplantation: Emerging Knowledge: A Scientific Statement From the American Heart Association. Circulation 2019; 139:e553-e578. [DOI: 10.1161/cir.0000000000000598] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Sensitization, defined as the presence of circulating antibodies, presents challenges for heart transplant recipients and physicians. When present, sensitization can limit a transplantation candidate’s access to organs, prolong wait time, and, in some cases, exclude the candidate from heart transplantation altogether. The management of sensitization is not yet standardized, and current therapies have not yielded consistent results. Although current strategies involve antibody suppression and removal with intravenous immunoglobulin, plasmapheresis, and antibody therapy, newer strategies with more specific targets are being investigated.
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22
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Cogswell R, Duval S, John R. Left ventricular assist device is protective against cardiac transplant delisting for medical unsuitability. Int J Cardiol 2018; 268:51-54. [PMID: 29803342 DOI: 10.1016/j.ijcard.2018.05.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 04/26/2018] [Accepted: 05/07/2018] [Indexed: 11/18/2022]
Abstract
BACKGROUND Left ventricular assist device (LVAD) related complications have the potential to disqualify patients for heart transplantation. We sought to determine whether LVAD support was associated with increased rates of delisting due to medical unsuitability or clinical deterioration. METHODS The analysis included adult candidates listed for first-time heart transplantation in the UNOS registry in the contemporary, continuous flow (CF)- LVAD era (2010-2016). The exposure variable was LVAD support on the waitlist. The primary outcome was time to delisting due to medical unsuitability or clinical deterioration. As cardiac transplantation and death represent competing risks in this study, a Fine-Gray cox regression analysis was performed. RESULTS Data on 16,913 patients listed for heart transplant were analyzed. During a median follow up of 150 days, 1206 (7.1%) patients died, 10,083 (60%) were transplanted, and 1224 (7.2%) were delisted due to medical unsuitability or clinical deterioration. Presence of a LVAD at listing was associated with a reduced rate (hazard) of delisting both in the adjusted and unadjusted models (unadjusted HR 0.63, 95% CI 0.55-0.73, adjusted HR 0.78, 95% CI 0.67-0.90). Delayed LVAD while on the list was not associated with reduced rates of delisting (adjusted HR 0.91, 95% CI 0.79-1.1). CONCLUSIONS Continuous flow left ventricular assist device support was protective against delisting in this UNOS analysis. These data would suggest that despite the adverse event rate of mechanical support, improving cardiac output may be important to preserving the overall health of the potential cardiac transplant recipient.
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Affiliation(s)
- Rebecca Cogswell
- Division of Cardiology, University of Minnesota, 420 Delaware Street SE, MMC 508, Minneapolis, MN 55455, USA.
| | - Sue Duval
- Division of Cardiology, University of Minnesota, 420 Delaware Street SE, MMC 508, Minneapolis, MN 55455, USA
| | - Ranjit John
- Division of Cardiovascular Surgery, University of Minnesota, 420 Delaware Street SE, MMC 195, Minneapolis, MN 55455, USA
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23
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Kwak J, Majewski M, LeVan PT. Heart Transplantation in an Era of Mechanical Circulatory Support. J Cardiothorac Vasc Anesth 2018; 32:19-31. [DOI: 10.1053/j.jvca.2017.09.042] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Indexed: 11/11/2022]
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24
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Kobashigawa J, Colvin M, Potena L, Dragun D, Crespo-Leiro MG, Delgado JF, Olymbios M, Parameshwar J, Patel J, Reed E, Reinsmoen N, Rodriguez ER, Ross H, Starling RC, Tyan D, Urschel S, Zuckermann A. The management of antibodies in heart transplantation: An ISHLT consensus document. J Heart Lung Transplant 2018; 37:537-547. [PMID: 29452978 DOI: 10.1016/j.healun.2018.01.1291] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Accepted: 01/18/2018] [Indexed: 12/19/2022] Open
Abstract
Despite the successes from refined peri-operative management techniques and immunosuppressive therapies, antibodies remain a serious cause of morbidity and mortality for patients both before and after heart transplantation. Patients awaiting transplant who possess antibodies against human leukocyte antigen are disadvantaged by having to wait longer to receive an organ from a suitably matched donor. The number of pre-sensitized patients has been increasing, a trend that is likely due to the increased use of mechanical circulatory support devices. Even patients who are not pre-sensitized can go on to produce donor-specific antibodies after transplant, which are associated with worse outcomes. The difficulty in managing antibodies is uncertainty over which antibodies are of clinical relevance, which patients to treat, and which treatments are most effective and safe. There is a distinct lack of data from prospective trials. An international consensus conference was organized and attended by 103 participants from 75 centers to debate contentious issues, determine the best practices, and formulate ideas for future research on antibodies. Prominent experts presented state-of-the-art talks on antibodies, which were followed by group discussions, and then, finally, a reconvened session to establish consensus where possible. Herein we address the discussion, consensus points, and research ideas.
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Affiliation(s)
- Jon Kobashigawa
- Advanced Heart Disease Section, Cedars-Sinai Heart Institute, Los Angeles, California, USA.
| | - Monica Colvin
- Cardiovascular Division, University of Michigan, Ann Arbor, Michigan, USA
| | - Luciano Potena
- Department of Specialist, Diagnostic, and Experimental Medicine, Bologna University Hospital, Bologna, Italy
| | - Duska Dragun
- Center for Cardiovascular Research, Charité Universtätsmedizin, Berlin, Germany
| | - Maria G Crespo-Leiro
- Heart Failure and Heart Transplant Program, Hospital Universitario A Coruña, Coruña, Spain
| | - Juan F Delgado
- Cardiology Department, Hospital Universitario 12 de Octubre, Madrid, Spain
| | - Michael Olymbios
- Advanced Heart Disease Section, Cedars-Sinai Heart Institute, Los Angeles, California, USA
| | | | - Jignesh Patel
- Advanced Heart Disease Section, Cedars-Sinai Heart Institute, Los Angeles, California, USA
| | - Elaine Reed
- UCLA Immunogenetics Center, Los Angeles, California, USA
| | - Nancy Reinsmoen
- Department of Immunology, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - E Rene Rodriguez
- Department of Anatomic Pathology, Cleveland Clinic, Cleveland, Ohio, USA
| | - Heather Ross
- Ted Rogers Centre of Excellence in Heart Function, University of Toronto, Toronto, Ontario, Canada
| | - Randall C Starling
- Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, Ohio, USA
| | - Dolly Tyan
- Department of Clinical Pathology, Stanford University Medical Center, Palo Alto, California, USA
| | - Simon Urschel
- Division of Pediatric Cardiology, University of Alberta, Edmonton, Alberta, Canada
| | - Andreas Zuckermann
- Department of Cardiothoracic Surgery, Medical University of Vienna, Vienna, Austria
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25
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The Approach to Antibodies After Heart Transplantation. CURRENT TRANSPLANTATION REPORTS 2017; 4:243-251. [DOI: 10.1007/s40472-017-0162-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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26
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Magdo HS, Schumacher KR, Yu S, Gajarski RJ, Friedland-Little JM. Clinical significance of anti-HLA antibodies associated with ventricular assist device use in pediatric patients: A United Network for Organ Sharing database analysis. Pediatr Transplant 2017; 21. [PMID: 28568969 DOI: 10.1111/petr.12938] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/30/2017] [Indexed: 11/30/2022]
Abstract
While VAD use in pediatric patients has previously been associated with anti-HLA antibody production, the clinical significance of these antibodies is unclear. We investigated the clinical impact of anti-HLA antibodies associated with VAD use in a large cohort of pediatric HTx recipients. From 2004 to 2011, pediatric cardiomyopathy patients post-HTx (N=1288) with pre-HTx PRA levels were identified from the United Network for Organ Sharing database. PRA levels were compared between VAD patients and those with no history of MCS. Incidence of rejection and overall survival were compared between VAD and non-MCS groups after stratification by PRA and age. VAD recipients were more likely to produce anti-HLA antibodies than non-MCS patients (25.5% vs 10.5% had PRA>10%, P<.0001). Sensitized VAD patients (PRA>10%) had a higher incidence of rejection within 15 months of HTx compared to sensitized non-MCS patients (57.1% vs 35.9%, P=.02). There was no intergroup difference in 15-month mortality. Among pediatric cardiomyopathy patients supported with a VAD, the presence of anti-HLA antibodies prior to HTx is associated with an increased risk of rejection. The mechanism of the association between VAD-associated antibodies and early rejection is unclear and warrants further investigation.
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Affiliation(s)
- H Sonali Magdo
- Department of Pediatrics, University of Utah, Salt Lake City, UT, USA
| | - Kurt R Schumacher
- Department of Pediatrics, University of Michigan, Ann Arbor, MI, USA
| | - Sunkyung Yu
- Department of Pediatrics, University of Michigan, Ann Arbor, MI, USA
| | - Robert J Gajarski
- Department of Pediatrics, Nationwide Children's Hospital, Columbus, OH, USA
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Antibody-mediated rejection in the cardiac allograft: diagnosis, treatment and future considerations. Curr Opin Cardiol 2017; 32:326-335. [PMID: 28212151 DOI: 10.1097/hco.0000000000000390] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
PURPOSE OF REVIEW This review summarizes the latest publications dealing with antibody-mediated rejection (AMR) and defines areas of controversy and future steps that may improve the outcome for patients with this virulent form of rejection. RECENT FINDINGS Recent progress includes publication of standardized pathologic criteria for acute AMR by the International Society for Heart and Lung Transplantation (ISHLT) and guidelines for treatment of acute AMR by the American Heart Association, endorsed by ISHLT as well. Recently published review articles emphasize the important role of innate immune mechanisms, clarify the role of viral infection and provide insights into vascular biology and the role of innate effector populations, macrophages and dendritic cells. SUMMARY Strategies for future studies are discussed in the context of these new findings and similar efforts undertaken by renal and liver allograft investigators.
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See SB, Clerkin KJ, Kennel PJ, Zhang F, Weber MP, Rogers KJ, Chatterjee D, Vasilescu ER, Vlad G, Naka Y, Restaino SW, Farr MA, Topkara VK, Colombo PC, Mancini DM, Schulze PC, Levin B, Zorn E. Ventricular assist device elicits serum natural IgG that correlates with the development of primary graft dysfunction following heart transplantation. J Heart Lung Transplant 2017; 36:862-870. [PMID: 28431981 DOI: 10.1016/j.healun.2017.03.018] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 02/28/2017] [Accepted: 03/22/2017] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Pre-transplant sensitization is a limiting factor in solid-organ transplantation. In heart transplants, ventricular assist device (VAD) implantation has been associated with sensitization to human leukocyte antigens (HLA). The effect of VAD on non-HLA antibodies is unclear. We have previously shown that polyreactive natural antibodies (Nabs) contribute to pre-sensitization in kidney allograft recipients. Here we assessed generation of Nabs after VAD implantation in pre-transplant sera and examined their contribution to cardiac allograft outcome. METHODS IgM and IgG Nabs were tested in pre-transplant serum samples collected from 206 orthotopic heart transplant recipients, including 128 patients with VAD (VAD patients) and 78 patients without VAD (no-VAD patients). Nabs were assessed by testing serum reactivity to apoptotic cells by flow cytometry and to the generic oxidized epitope, malondialdehyde, by enzyme-linked immunosorbent assay. RESULTS No difference was observed in serum levels of IgM Nabs between VAD and no-VAD patients. However, serum IgG Nabs levels were significantly increased in VAD compared with no-VAD patients. This increase was likely due to the presence of the VAD, as revealed by lower serum IgG Nabs levels before implantation. Elevated pre-transplant IgG Nabs level was associated with development of primary graft dysfunction (PGD). CONCLUSIONS Our study demonstrates that VAD support elicits IgG Nabs reactive to apoptotic cells and oxidized epitopes. These findings further support broad and non-specific B-cell activation by VAD, resulting in IgG sensitization. Moreover, the association of serum IgG Nabs levels with development of PGD suggests a possible role for these antibodies in the inflammatory reaction accompanying this complication.
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Affiliation(s)
- Sarah B See
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, New York
| | - Kevin J Clerkin
- Division of Cardiology, Department of Medicine, Columbia University Medical Center, New York, New York
| | - Peter J Kennel
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, New York
| | - Feifan Zhang
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, New York
| | - Matthew P Weber
- Division of Cardiology, Department of Medicine, Columbia University Medical Center, New York, New York
| | - Kortney J Rogers
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, New York
| | - Debanjana Chatterjee
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, New York
| | - Elena R Vasilescu
- Department of Pathology and Cell Biology, Department of Surgery, Columbia University Medical Center, New York, New York
| | - George Vlad
- Department of Pathology and Cell Biology, Department of Surgery, Columbia University Medical Center, New York, New York
| | - Yoshifumi Naka
- Division of Cardiothoracic Surgery, Department of Surgery, Columbia University Medical Center, New York, New York
| | - Susan W Restaino
- Division of Cardiology, Department of Medicine, Columbia University Medical Center, New York, New York
| | - Maryjane A Farr
- Division of Cardiology, Department of Medicine, Columbia University Medical Center, New York, New York
| | - Veli K Topkara
- Division of Cardiology, Department of Medicine, Columbia University Medical Center, New York, New York
| | - Paolo C Colombo
- Division of Cardiology, Department of Medicine, Columbia University Medical Center, New York, New York
| | - Donna M Mancini
- Division of Cardiology, Department of Medicine, Columbia University Medical Center, New York, New York
| | - P Christian Schulze
- Division of Cardiology, Department of Medicine, Columbia University Medical Center, New York, New York
| | - Bruce Levin
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, New York
| | - Emmanuel Zorn
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, New York.
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Nestorovic EM, Grupper A, Joyce LD, Milic NM, Stulak JM, Edwards BS, Pereira NL, Daly RC, Kushwaha SS. Effect of Pretransplant Continuous-Flow Left Ventricular Assist Devices on Cellular and Antibody-Mediated Rejection and Subsequent Allograft Outcomes. Am J Cardiol 2017; 119:452-456. [PMID: 27939231 DOI: 10.1016/j.amjcard.2016.10.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 10/11/2016] [Accepted: 10/11/2016] [Indexed: 11/27/2022]
Abstract
The aim of this study was to evaluate the impact of continuous-flow left ventricular assist devices (CF-LVAD) on subsequent rejection after heart transplantation (HT) by using cellular rejection score and antibody-mediated rejection score (AMRS) and correlating with subsequent allograft outcomes. We retrospectively analyzed 108 consecutive patients who underwent HT without (n = 67) or with (n = 41) previous CF-LVAD in 2008 to 2014. The 24 months cumulative effect of rejection was calculated by using cellular rejection scores and AMRS, based on the total number of rejections divided by valid biopsy samples. Vasculopathy was assessed both by routine coronary angiogram and intravascular ultrasound. Patients who underwent pretransplant CF-LVAD demonstrated a significant increase in the number of cellular rejection episodes as compared with the nonbridged patients, for 1 and 2 years of follow-up (p = 0.026 and p = 0.016), respectively. There were no differences in AMRS (p >0.05) and allograft outcomes, such as vasculopathy and overall survival (p >0.05) over the period of follow-up. Implantation of a CF-LVAD before HT impacts cellular rejection during the post-transplant period. Despite these findings, CF-LVAD does not translate to differences in allograft outcomes after transplant, such as vasculopathy and overall survival over the period of the study. In conclusion, whether this affects longer term outcomes than studied remains to be determined.
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Heart failure therapies: new strategies for old treatments and new treatments for old strategies. Cardiovasc Pathol 2016; 25:503-511. [PMID: 27619734 DOI: 10.1016/j.carpath.2016.08.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 08/26/2016] [Accepted: 08/26/2016] [Indexed: 11/23/2022] Open
Abstract
Heart failure, whether acute or chronic, remains a major health care crisis affecting almost 6 million Americans and over 23 million people worldwide. Roughly half of those affected will die within 5 years, and the annual cost exceeds $30 billion in the US alone. Although medical therapy has made some modest inroads in partially stemming the heart failure tsunami, there remains a significant population for whom medication is unsuccessful or has ceased being effective; such patients can benefit from heart transplantation or mechanical circulatory support. Indeed, in the past quarter century (and as covered in Cardiovascular Pathology over those years), significant improvements in pathologic understanding and in engineering design have materially enhanced the toolkit of options for such refractory patients. Mechanical devices, whether total artificial hearts or ventricular assist devices, have been reengineered to reduce complications and basic wear and tear. Transplant survival has also been extended through a better comprehension of and improved therapies for transplant vasculopathy and antibody-mediated rejection. Here we review the ideas and treatments from the last 25 years and highlight some of the new directions in nonpharmacologic heart failure therapy.
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Abstract
Cardiac allograft vasculopathy (CAV) has a high prevalence among patients that have undergone heart transplantation. Cardiac allograft vasculopathy is a multifactorial process in which the immune system is the driving force. In this review, the data on the immunological and fibrotic processes that are involved in the development of CAV are summarized. Areas where a lack of knowledge exists and possible additional research can be completed are pinpointed. During the pathogenesis of CAV, cells from the innate and the adaptive immune system cooperate to reject the foreign heart. This inflammatory response results in dysfunction of the endothelium and migration and proliferation of smooth muscle cells (SMCs). Apoptosis and factors secreted by both the endothelium as well as the SMCs lead to fibrosis. The migration of SMCs together with fibrosis provoke concentric intimal thickening of the coronary arteries, which is the main characteristic of CAV.
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Klein H, Schanz U, Hivelin M, Waldner M, Koljonen V, Guggenheim M, Giovanoli P, Gorantla V, Fehr T, Plock J. Sensitization and desensitization of burn patients as potential candidates for vascularized composite allotransplantation. Burns 2016; 42:246-57. [DOI: 10.1016/j.burns.2015.05.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 05/25/2015] [Indexed: 12/26/2022]
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Chiu P, Schaffer JM, Oyer PE, Pham M, Banerjee D, Joseph Woo Y, Ha R. Influence of durable mechanical circulatory support and allosensitization on mortality after heart transplantation. J Heart Lung Transplant 2016; 35:731-42. [PMID: 26856669 DOI: 10.1016/j.healun.2015.12.023] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Revised: 11/22/2015] [Accepted: 12/21/2015] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Allosensitization has been shown to negatively affect post-heart transplant (HTx) survival even with a negative crossmatch. Whether allosensitization related to mechanical circulatory support (MCS) is associated with worse post-HTx survival remains controversial. METHODS Adult HTx recipients listed in the United Network for Organ Sharing database (July 2006-December 2012) were identified. Multivariate Cox regression assessed the effect of allosensitization on survival. Propensity matching was performed to compare patients who were and were not allosensitized. Kaplan-Meier survival analysis compared matched and unmatched patients in the MCS and medically managed cohorts. RESULTS We identified 11,840 HTx recipients, of whom 4,167 had MCS. MCS was associated with allosensitization in multivariate logistic regression. Each different MCS device was associated with worse post-HTx survival in multivariate Cox regression. Allosensitization did not predict post-HTx mortality in MCS patients (hazard ratio, 1.07; 95% confidence interval, 0.89-1.28; p = 0.48. Among patients without MCS, allosensitization was associated with post-HTx mortality (hazard ratio, 1.19; 95% confidence interval, 1.03-1.39; p = 0.02). Kaplan-Meier analysis revealed equivalent survival in unmatched and matched cohorts when MCS patients who were allosensitized were compared with non-allosensitized MCS patients. Among non-MCS patients, allosensitization was associated with worse survival in unmatched and matched analysis. CONCLUSIONS MCS was associated with allosensitization. For MCS patients, allosensitization did not independently predict worse post-HTx outcome. Among non-MCS patients, allosensitization was associated with worse post-HTx survival. Allosensitization appears to be a heterogeneous process influenced by presence of MCS.
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Affiliation(s)
- Peter Chiu
- Department of Cardiothoracic Surgery, Stanford University Medical Center, Stanford, California
| | - Justin M Schaffer
- Department of Cardiothoracic Surgery, Stanford University Medical Center, Stanford, California
| | - Philip E Oyer
- Department of Cardiothoracic Surgery, Stanford University Medical Center, Stanford, California
| | - Michael Pham
- Division of Cardiovascular Medicine, Stanford University, School of Medicine, Stanford, California
| | - Dipanjan Banerjee
- Division of Cardiovascular Medicine, Stanford University, School of Medicine, Stanford, California
| | - Y Joseph Woo
- Department of Cardiothoracic Surgery, Stanford University Medical Center, Stanford, California
| | - Richard Ha
- Department of Cardiothoracic Surgery, Stanford University Medical Center, Stanford, California.
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Kidambi S, Mohamedali B, Bhat G. Clinical outcomes in sensitized heart transplant patients bridged with ventricular assist devices. Clin Transplant 2015; 29:499-505. [DOI: 10.1111/ctr.12540] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/10/2015] [Indexed: 01/04/2023]
Affiliation(s)
- Sumanth Kidambi
- Division of Advanced Heart Failure and Clinical Transplantation; Advocate Christ Medical Center; Oak Lawn IL USA
| | | | - Geetha Bhat
- Division of Advanced Heart Failure and Clinical Transplantation; Advocate Christ Medical Center; Oak Lawn IL USA
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Kwon MH, Zhang JQ, Schaenman JM, Cadeiras M, Gjertson DW, Krystal CA, Laks H, Ardehali A, Deng MC, Shemin RJ, Reed EF. Characterization of ventricular assist device-mediated sensitization in the bridge-to-heart-transplantation patient. J Thorac Cardiovasc Surg 2015; 149:1161-6. [PMID: 25702320 DOI: 10.1016/j.jtcvs.2015.01.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 12/19/2014] [Accepted: 01/02/2015] [Indexed: 12/01/2022]
Abstract
OBJECTIVE Ventricular assist devices (VADs) are associated with increased anti-human leukocyte antigen antibody production. The purpose of this study is to characterize differences in sensitization patterns in patients receiving axial flow, implantable VADs versus pulsatile, paracorporeal biventricular assist devices (BIVADs) as bridges to transplantation. METHODS The study is a retrospective review of 68 patients who were bridged to transplantation with either a VAD or a BIVAD, as described, from January 2007 to June 2010, at a university medical center. RESULTS Five of 15 (33.3%) VAD patients became sensitized during treatment, compared with 30 of 53 (56.6%) BIVAD patients, P = .15. Multivariable analysis comparing BIVAD with VAD, while controlling for previous cardiac surgery, pregnancy, and packed red blood cell transfusion produced an odds ratio of 2.99, P = .14. Of sensitized patients, all 5 (100%) of the VAD patients had pre-existing antibodies before VAD placement, compared with 9 of 30 (30.0%) BIVAD patients, P = .006. Maximum cumulative mean fluorescence intensities for BIVAD were 46,259 ± 66,349 versus 42,540 ± 12,840 for VAD, P = .90. Time to maximum antibody expression was shorter for the VAD group (34 ± 28 days vs 5.8 ± 9 days, P = .04). CONCLUSIONS Device type was not a factor in patient sensitization after implantation. However, VAD patients required pre-existing sensitization before implantation to produce antibodies during their treatment interval, whereas more than two thirds of BIVAD patients developed de novo antibodies. These data suggest that the mechanism of sensitization between VAD and BIVAD patients may differ, and further mechanistic studies into the impact of device types on patient sensitization are warranted.
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Affiliation(s)
- Murray H Kwon
- Division of Cardiothoracic Surgery, Department of Surgery, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, Calif.
| | - Jennifer Q Zhang
- University of California, Los Angeles Immunogenetics Center, University of California, Los Angeles, Los Angeles, Calif
| | - Joanna M Schaenman
- Division of Immunology, Department of Medicine, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, Calif
| | - Martin Cadeiras
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, Calif
| | - David W Gjertson
- University of California, Los Angeles Immunogenetics Center, University of California, Los Angeles, Los Angeles, Calif
| | - Carolyn A Krystal
- David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, Calif
| | - Hillel Laks
- Division of Cardiothoracic Surgery, Department of Surgery, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, Calif
| | - Abbas Ardehali
- Division of Cardiothoracic Surgery, Department of Surgery, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, Calif
| | - Mario C Deng
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, Calif
| | - Richard J Shemin
- Division of Cardiothoracic Surgery, Department of Surgery, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, Calif
| | - Elaine F Reed
- University of California, Los Angeles Immunogenetics Center, University of California, Los Angeles, Los Angeles, Calif
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36
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Approach to the Sensitized Patient Awaiting Heart Transplantation. CURRENT TRANSPLANTATION REPORTS 2014. [DOI: 10.1007/s40472-014-0031-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Picascia A, Grimaldi V, Casamassimi A, De Pascale MR, Schiano C, Napoli C. Human leukocyte antigens and alloimmunization in heart transplantation: an open debate. J Cardiovasc Transl Res 2014; 7:664-75. [PMID: 25190542 DOI: 10.1007/s12265-014-9587-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Accepted: 08/20/2014] [Indexed: 10/24/2022]
Abstract
Considerable advances in heart transplantation outcome have been achieved through the improvement of donor-recipient selection, better organ preservation, lower rates of perioperative mortality and the use of innovative immunosuppressive protocols. Nevertheless, long-term survival is still influenced by late complications. We support the introduction of HLA matching as an additional criterion in the heart allocation. Indeed, allosensitization is an important factor affecting heart transplantation and the presence of anti-HLA antibodies causes an increased risk of antibody-mediated rejection and graft failure. On the other hand, the rate of heart-immunized patients awaiting transplantation is steadily increasing due to the limited availability of organs and an increased use of ventricular assist devices. Significant benefits may result from virtual crossmatch approach that prevents transplantation in the presence of unacceptable donor antigens. A combination of both virtual crossmatch and a tailored desensitization therapy could be a good compromise for a favorable outcome in highly sensitized patients. Here, we discuss the unresolved issue on the clinical immunology of heart transplantation.
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Affiliation(s)
- Antonietta Picascia
- U.O.C. Division of Immunohematology, Transfusion Medicine and Transplant Immunology [SIMT], Regional Reference Laboratory of Transplant Immunology [LIT], Azienda Ospedaliera Universitaria (AOU), Second University of Naples, Piazza L. Miraglia 2, 80138, Naples, Italy,
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Kilic A, Emani S, Sai-Sudhakar CB, Higgins RSD, Whitson BA. Donor selection in heart transplantation. J Thorac Dis 2014; 6:1097-104. [PMID: 25132976 DOI: 10.3978/j.issn.2072-1439.2014.03.23] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Accepted: 03/17/2014] [Indexed: 01/17/2023]
Abstract
There is increased scrutiny on the quality in health care with particular emphasis on institutional heart transplant survival outcomes. An important aspect of successful transplantation is appropriate donor selection. We review the current guidelines as well as areas of controversy in the selection of appropriate hearts as donor organs to ensure optimal outcomes. This decision is paramount to the success of a transplant program as well as recipient survival and graft function post-transplant.
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Affiliation(s)
- Ahmet Kilic
- 1 The Department of Surgery, 2 The Department of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Sitaramesh Emani
- 1 The Department of Surgery, 2 The Department of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Chittoor B Sai-Sudhakar
- 1 The Department of Surgery, 2 The Department of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Robert S D Higgins
- 1 The Department of Surgery, 2 The Department of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Bryan A Whitson
- 1 The Department of Surgery, 2 The Department of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
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Patel CB, Cowger JA, Zuckermann A. A contemporary review of mechanical circulatory support. J Heart Lung Transplant 2014; 33:667-74. [DOI: 10.1016/j.healun.2014.02.014] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 02/10/2014] [Accepted: 02/13/2014] [Indexed: 01/16/2023] Open
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