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Marginal Impact of Tocilizumab Monotherapy on Anti-HLA Alloantibodies in Highly Sensitized Kidney Transplant Candidates. Transplant Direct 2021; 7:e690. [PMID: 33912657 PMCID: PMC8078280 DOI: 10.1097/txd.0000000000001139] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 01/25/2021] [Indexed: 02/01/2023] Open
Abstract
Background. Highly HLA–sensitized kidney transplant candidates are difficult to desensitize, which reduces their chances of receiving a transplant. Methods. We administered tocilizumab as a monotherapy (8 mg/kg once a mo) to 14 highly sensitized kidney transplant candidates. Highest mean fluorescence intensities of anti-HLA antibodies obtained before and after tocilizumab administration were compared from raw and diluted sera. Results. The administration of tocilizumab significantly reduced dominant anti-HLA antibody sensitization. However, this decrease in mean fluorescence intensities was minor compared with the initial values. Conclusions. Tocilizumab as a monotherapy was not sufficient to allow highly sensitized kidney–transplant candidates to undergo transplantation and, therefore, was not an effective desensitization method.
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Noble J, Metzger A, Naciri Bennani H, Daligault M, Masson D, Terrec F, Imerzoukene F, Bardy B, Fiard G, Marlu R, Chevallier E, Janbon B, Malvezzi P, Rostaing L, Jouve T. Apheresis Efficacy and Tolerance in the Setting of HLA-Incompatible Kidney Transplantation. J Clin Med 2021; 10:jcm10061316. [PMID: 33806743 PMCID: PMC8005077 DOI: 10.3390/jcm10061316] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 03/07/2021] [Accepted: 03/17/2021] [Indexed: 12/23/2022] Open
Abstract
Nearly 18% of patients on a waiting list for kidney transplantation (KT) are highly sensitized, which make access to KT more difficult. We assessed the efficacy and tolerance of different techniques (plasma exchanges [PE], double-filtration plasmapheresis [DFPP], and immunoadsorption [IA]) to remove donor specific antibodies (DSA) in the setting of HLA-incompatible (HLAi) KT. All patients that underwent apheresis for HLAi KT within a single center were included. Intra-session and inter-session Mean Fluorescence Intensity (MFI) decrease in DSA, clinical and biological tolerances were assessed. A total of 881 sessions were performed for 45 patients: 107 DFPP, 54 PE, 720 IA. The procedures led to HLAi KT in 39 patients (87%) after 29 (15–51) days. A higher volume of treated plasma was associated with a greater decrease of inter-session class I and II DSA (p = 0.04, p = 0.02). IA, PE, and a lower maximal DSA MFI were associated with a greater decrease in intra-session class II DSA (p < 0.01). Safety was good: severe adverse events occurred in 17 sessions (1.9%), more frequently with DFPP (6.5%) p < 0.01. Hypotension occurred in 154 sessions (17.5%), more frequently with DFPP (p < 0.01). Apheresis is well tolerated (IA and PE > DFPP) and effective at removing HLA antibodies and allows HLAi KT for sensitized patients.
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Affiliation(s)
- Johan Noble
- Nephrology, Hemodialysis, Apheresis and Kidney Transplantation Department, University Hospital Grenoble, 38000 Grenoble, France; (J.N.); (A.M.); (H.N.B.); (M.D.); (F.T.); (F.I.); (E.C.); (B.J.); (P.M.); (T.J.)
- University Grenoble Alpes, 38000 Grenoble, France
| | - Antoine Metzger
- Nephrology, Hemodialysis, Apheresis and Kidney Transplantation Department, University Hospital Grenoble, 38000 Grenoble, France; (J.N.); (A.M.); (H.N.B.); (M.D.); (F.T.); (F.I.); (E.C.); (B.J.); (P.M.); (T.J.)
| | - Hamza Naciri Bennani
- Nephrology, Hemodialysis, Apheresis and Kidney Transplantation Department, University Hospital Grenoble, 38000 Grenoble, France; (J.N.); (A.M.); (H.N.B.); (M.D.); (F.T.); (F.I.); (E.C.); (B.J.); (P.M.); (T.J.)
| | - Melanie Daligault
- Nephrology, Hemodialysis, Apheresis and Kidney Transplantation Department, University Hospital Grenoble, 38000 Grenoble, France; (J.N.); (A.M.); (H.N.B.); (M.D.); (F.T.); (F.I.); (E.C.); (B.J.); (P.M.); (T.J.)
| | - Dominique Masson
- HLA Laboratory—Établissement Français du Sang-EFS-, 38000 Grenoble, France; (D.M.); (B.B.)
| | - Florian Terrec
- Nephrology, Hemodialysis, Apheresis and Kidney Transplantation Department, University Hospital Grenoble, 38000 Grenoble, France; (J.N.); (A.M.); (H.N.B.); (M.D.); (F.T.); (F.I.); (E.C.); (B.J.); (P.M.); (T.J.)
| | - Farida Imerzoukene
- Nephrology, Hemodialysis, Apheresis and Kidney Transplantation Department, University Hospital Grenoble, 38000 Grenoble, France; (J.N.); (A.M.); (H.N.B.); (M.D.); (F.T.); (F.I.); (E.C.); (B.J.); (P.M.); (T.J.)
| | - Beatrice Bardy
- HLA Laboratory—Établissement Français du Sang-EFS-, 38000 Grenoble, France; (D.M.); (B.B.)
| | - Gaelle Fiard
- Urology Department, University Hospital Grenoble, 38000 Grenoble, France;
- TIMC-IMAG, Grenoble INP, CNRS, University Grenoble Alpes, F-38000 Grenoble, France
| | - Raphael Marlu
- Haemostasis Laboratory, University Hospital Grenoble, 38000 Grenoble, France;
| | - Eloi Chevallier
- Nephrology, Hemodialysis, Apheresis and Kidney Transplantation Department, University Hospital Grenoble, 38000 Grenoble, France; (J.N.); (A.M.); (H.N.B.); (M.D.); (F.T.); (F.I.); (E.C.); (B.J.); (P.M.); (T.J.)
| | - Benedicte Janbon
- Nephrology, Hemodialysis, Apheresis and Kidney Transplantation Department, University Hospital Grenoble, 38000 Grenoble, France; (J.N.); (A.M.); (H.N.B.); (M.D.); (F.T.); (F.I.); (E.C.); (B.J.); (P.M.); (T.J.)
| | - Paolo Malvezzi
- Nephrology, Hemodialysis, Apheresis and Kidney Transplantation Department, University Hospital Grenoble, 38000 Grenoble, France; (J.N.); (A.M.); (H.N.B.); (M.D.); (F.T.); (F.I.); (E.C.); (B.J.); (P.M.); (T.J.)
| | - Lionel Rostaing
- Nephrology, Hemodialysis, Apheresis and Kidney Transplantation Department, University Hospital Grenoble, 38000 Grenoble, France; (J.N.); (A.M.); (H.N.B.); (M.D.); (F.T.); (F.I.); (E.C.); (B.J.); (P.M.); (T.J.)
- University Grenoble Alpes, 38000 Grenoble, France
- Correspondence: ; Tel.: +33-476768945; Fax: +33-476765263
| | - Thomas Jouve
- Nephrology, Hemodialysis, Apheresis and Kidney Transplantation Department, University Hospital Grenoble, 38000 Grenoble, France; (J.N.); (A.M.); (H.N.B.); (M.D.); (F.T.); (F.I.); (E.C.); (B.J.); (P.M.); (T.J.)
- University Grenoble Alpes, 38000 Grenoble, France
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Salvadori M, Tsalouchos A. Therapeutic apheresis in kidney transplantation: An updated review. World J Transplant 2019; 9:103-122. [PMID: 31750088 PMCID: PMC6851502 DOI: 10.5500/wjt.v9.i6.103] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 10/02/2019] [Accepted: 10/15/2019] [Indexed: 02/05/2023] Open
Abstract
Therapeutic apheresis is a cornerstone of therapy for several conditions in transplantation medicine and is available in different technical variants. In the setting of kidney transplantation, immunological barriers such as ABO blood group incompatibility and preformed donor-specific antibodies can complicate the outcome of deceased- or living- donor transplantation. Postoperatively, additional problems such as antibody-mediated rejection and a recurrence of primary focal segmental glomerulosclerosis can limit therapeutic success and decrease graft survival. Therapeutic apheresis techniques find application in these issues by separating and selectively removing exchanging or modifying pathogenic material from the patient by an extracorporeal aphaeresis system. The purpose of this review is to describe the available techniques of therapeutic aphaeresis with their specific advantages and disadvantages and examine the evidence supporting the application of therapeutic aphaeresis as an adjunctive therapeutic option to immunosuppressive agents in protocols before and after kidney transplantation.
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Affiliation(s)
- Maurizio Salvadori
- Department of Transplantation Renal Unit, Careggi University Hospital, Florence 50139, Italy
| | - Aris Tsalouchos
- Nephrology and Dialysis Unit, Saints Cosmas and Damian Hospital, Pescia 51017, Italy
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McCaughan J, Xu Q, Tinckam K. Detecting donor-specific antibodies: the importance of sorting the wheat from the chaff. Hepatobiliary Surg Nutr 2019; 8:37-52. [PMID: 30881964 DOI: 10.21037/hbsn.2019.01.01] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Human leukocyte antigen (HLA) compatibility is very important for successful transplantation of solid organs. In this paper, we focused on the humoral arm of immunity in the clinical setting of organ transplantation: how HLA antibodies develop, how they can be detected, and what they can do to injure organ transplants. Specifically, we explore the technical perspectives of detecting donor-specific antibodies (DSA) in HLA laboratories, and use real-life clinical cases to explain the principles. Currently there are many tools in our HLA antibody detection toolbox: conventional cytotoxicity cross match, flow cross match, and solid phase assays using beads conjugated with single or multiple HLA antigens. Single antigen bead (SAB) assay is the most sensitive tool available for detecting HLA antibodies and assessing the immunological risk for organ transplant. However, there are intrinsic limitations to solid-phase assays and they are prone to both false negativity and importantly, false positivity. Denatured antigens on single antigen beads might be the most prominent source of false positive reactivity, and may have been underestimated by many HLA experts. No single assay is perfect and therefore multiple methods, including the less sensitive assays, should be employed to determine the clinical relevance of detected HLA antibodies. Thoughtful process, including knowledge of HLA systems, cross reactivity, epitopes, and the patient's clinical history should be employed to correctly interpret data. The clinical team should work closely with HLA laboratories to ensure accurate interpretation of information and optimal management of patients before and after organ transplantation.
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Affiliation(s)
- Jennifer McCaughan
- Regional Histocompatibility Laboratory, University Health Network, Toronto, ON, Canada
| | - Qingyong Xu
- Transplant Immunology Lab, London Health Sciences Centre, London, ON, Canada
| | - Kathryn Tinckam
- Regional Histocompatibility Laboratory, University Health Network, Toronto, ON, Canada
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