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Miller P, Caza T. The expanding spectrum and utility of antigens in membranous nephropathy. Curr Opin Nephrol Hypertens 2023; 32:232-240. [PMID: 36811646 DOI: 10.1097/mnh.0000000000000876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
PURPOSE OF REVIEW Multiple antigenic targets were discovered in membranous nephropathy, representing distinct autoimmune diseases with a similar morphologic pattern of injury. An overview of recent developments, including antigen types, clinical associations, serologic monitoring, and advancements in understanding disease pathogenesis are provided. RECENT FINDINGS Several new antigenic targets have defined subtypes of membranous nephropathy, including Neural epidermal growth factor-like 1, protocadherin 7, HTRA1, FAT1, SEMA3B, NTNG1, NCAM1, exostosin 1/2, transforming growth factor beta receptor 3, CNTN1, proprotein convertase subtilisin/kexin type 6, and neuron-derived neurotrophic factor. Autoantigens in membranous nephropathy may demonstrate unique clinical associations, assisting the nephrologist to identify potential disease etiologies and triggers, such as autoimmune disease, cancer, medications, and infections. SUMMARY We are entering an exciting era for which an antigen-based approach will further define subtypes of membranous nephropathy, allow for development of noninvasive diagnostics, and improve care for patients.
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Affiliation(s)
- Paul Miller
- Arkana Laboratories, Little Rock, Arkansas, USA
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Zanoni F, Khairallah P, Kiryluk K, Batal I. Glomerular Diseases of the Kidney Allograft: Toward a Precision Medicine Approach. Semin Nephrol 2022; 42:29-43. [PMID: 35618394 PMCID: PMC9139085 DOI: 10.1016/j.semnephrol.2022.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The continual development of potent immunosuppressive regimens has led to a decreased incidence of acute rejection and improvement of short-term kidney allograft survival. In contrast to acute rejection, glomerular diseases of the kidney allograft are being encountered more frequently and are emerging as leading causes of late kidney allograft failure. Although data on the pathogeneses of glomerular diseases in the kidney allograft are sparse, cumulative evidence suggests that post-transplant glomerular diseases may be the result of inherited predispositions and immunologic triggers. Although studying immunologic signals and performing genome-wide association studies are ideal approaches to tackle glomerular diseases in the kidney allograft, such studies are challenging because of the lack of adequately powered cohorts. In this review, we focus on the most commonly encountered recurrent and de novo glomerular diseases in the kidney allograft. We address the important advances made in understanding the immunopathology and genetic susceptibility of glomerular diseases in the native kidney and how to benefit from such knowledge to further our knowledge of post-transplant glomerular diseases. Defining genomic and immune predictors for glomerular diseases in the kidney allograft would support novel donor-recipient matching strategies and development of targeted therapies to ultimately improve long-term kidney allograft survival.
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Affiliation(s)
- Francesca Zanoni
- Medicine, Nephrology, Columbia University Irving Medical Center, New York, NY, USA
| | | | - Krzysztof Kiryluk
- Medicine, Nephrology, Columbia University Irving Medical Center, New York, NY, USA
| | - Ibrahim Batal
- Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY, USA,Corresponding Author: Ibrahim Batal MD, Department of Pathology and Cell Biology, Renal Division, Columbia University Irving Medical Center, 630 W 168th street, VC14-238, New York, NY 10032, Phone: 212-305-9669, Fax: 212-342-5380,
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3
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Ronco P, Plaisier E, Debiec H. The role of PLA2R antibody monitoring: what we know and what we don't know. Nephrol Dial Transplant 2021; 38:826-833. [PMID: 34910212 DOI: 10.1093/ndt/gfab356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Indexed: 11/14/2022] Open
Abstract
For a long time, kidney biopsy was the only diagnostic mean for membranous nephropathy (MN), and proteinuria and serum creatinine the only markers of disease activity. The discovery of PLA2R antibody in 2009 has induced a paradigm shift in both the diagnostic and monitoring of patients. Two serological tests are routinely used: the ELISA which is quantitative and the immunofluorescence assay (IFA) which is more sensitive. In centers where the 2 assays are available, the recommendation is to use IFA for screening and diagnostic of immunological remission, and ELISA for monitoring effectiveness of therapy. In patients with positive PLA2R antibody serology, normal kidney function and no evidence for an underlying disease, a kidney biopsy is not mandatory given the almost 100% specificity of the assays. Because MN has different phases, one cannot base a clinical or therapeutic decision on a single measurement of PLA2R antibody at baseline. Risk evaluation of disease progression is a dynamic process that should be performed repeatedly to capture the trajectory of the disease based on both the traditional biomarkers (proteinuria, serum creatinine) and PLA2R antibody levels. Effectiveness of therapy is also evaluated on the PLA2R antibody trajectory, particularly during the first 6 months. Finally, PLA2R antibody monitoring has transformed the management of patients with a kidney allograft. Future studies are needed to develop more subtle immunological tests, including monitoring of antigen-specific memory B cells.
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Affiliation(s)
- Pierre Ronco
- Department of Nephrology, Centre Hospitalier du Mans, Le Mans, France
- Sorbonne Université, and Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1155, Paris, France
| | - Emmanuelle Plaisier
- Sorbonne Université, and Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1155, Paris, France
- Department of Nephrology, AURA Paris Plaisance, Paris, France
| | - Hanna Debiec
- Sorbonne Université, and Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1155, Paris, France
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Abstract
Membranous nephropathy (MN) is a glomerular disease that can occur at all ages. In adults, it is the most frequent cause of nephrotic syndrome. In ~80% of patients, there is no underlying cause of MN (primary MN) and the remaining cases are associated with medications or other diseases such as systemic lupus erythematosus, hepatitis virus infection or malignancies. MN is an autoimmune disease characterized by a thickening of the glomerular capillary walls due to immune complex deposition. Identification of the phospholipase A2 receptor (PLA2R) as the major antigen in adults in 2009 induced a paradigm shift in disease diagnosis and monitoring and several other antigens have since been characterized. Disease outcome is difficult to predict and around one-third of patients will undergo spontaneous remission. In those at high risk of progression, immunosuppressive therapy with cyclophosphamide plus corticosteroids has substantially reduced the need for kidney replacement therapy. Owing to carcinogenic risk, other treatments (calcineurin inhibitors and CD20-targeted B cell depletion therapy (rituximab)) have been developed. However, disease relapses are frequent when calcineurin inhibitors are stopped and the remission rate with rituximab is lower than with cyclophosphamide, particularly in patients with high PLA2R antibody titres. Other new drugs are already available and antigen-specific immunotherapies are being developed.
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Berchtold L, Letouzé E, Alexander MP, Canaud G, Logt AEVD, Hamilton P, Mousson C, Vuiblet V, Moyer AM, Guibert S, Mrázová P, Levi C, Dubois V, Cruzado JM, Torres A, Gandhi MJ, Yousfi N, Tesar V, Viklický O, Hourmant M, Moulin B, Rieu P, Choukroun G, Legendre C, Wetzels J, Brenchley P, Ballarín Castan JA, Debiec H, Ronco P. HLA-D and PLA2R1 risk alleles associate with recurrent primary membranous nephropathy in kidney transplant recipients. Kidney Int 2021; 99:671-685. [DOI: 10.1016/j.kint.2020.08.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 07/30/2020] [Accepted: 08/13/2020] [Indexed: 12/22/2022]
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Batal I, Vasilescu ER, Dadhania DM, Adel AA, Husain SA, Avasare R, Serban G, Santoriello D, Khairallah P, Patel A, Moritz MJ, Latulippe E, Riopel J, Khallout K, Swanson SJ, Bomback AS, Mohan S, Ratner L, Radhakrishnan J, Cohen DJ, Appel GB, Stokes MB, Markowitz GS, Seshan SV, De Serres SA, Andeen N, Loupy A, Kiryluk K, D'Agati VD. Association of HLA Typing and Alloimmunity With Posttransplantation Membranous Nephropathy: A Multicenter Case Series. Am J Kidney Dis 2020; 76:374-383. [PMID: 32359820 PMCID: PMC7483441 DOI: 10.1053/j.ajkd.2020.01.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 01/07/2020] [Indexed: 12/20/2022]
Abstract
RATIONALE & OBJECTIVES Posttransplantation membranous nephropathy (MN) represents a rare complication of kidney transplantation that can be classified as recurrent or de novo. The clinical, pathologic, and immunogenetic characteristics of posttransplantation MN and the differences between de novo and recurrent MN are not well understood. STUDY DESIGN Multicenter case series. SETTING & PARTICIPANTS We included 77 patients from 5 North American and European medical centers with post-kidney transplantation MN (27 de novo and 50 recurrent). Patients with MN in the native kidney who received kidney allografts but did not develop recurrent MN were used as nonrecurrent controls (n = 43). To improve understanding of posttransplantation MN, we compared de novo MN with recurrent MN and then contrasted recurrent MN with nonrecurrent controls. FINDINGS Compared with recurrent MN, de novo MN was less likely to be classified as primary MN (OR, 0.04; P < 0.001) and had more concurrent antibody-mediated rejection (OR, 12.0; P < 0.001) and inferior allograft survival (HR for allograft failure, 3.2; P = 0.007). HLA-DQ2 and HLA-DR17 antigens were more common in recipients with recurrent MN compared with those with de novo MN; however, the frequency of these recipient antigens in recurrent MN was similar to that in nonrecurrent MN controls. Among the 93 kidney transplant recipients with native kidney failure attributed to MN, older recipient age (HR per each year older, 1.03; P = 0.02), recipient HLA-A3 antigen (HR, 2.5; P = 0.003), steroid-free immunosuppressive regimens (HR, 2.84; P < 0.001), and living related allograft (HR, 1.94; P = 0.03) were predictors of MN recurrence. LIMITATIONS Retrospective case series, limited sample size due to rarity of the disease, nonstandardized nature of data collection and biopsies. CONCLUSIONS De novo and recurrent MN likely represent separate diseases. De novo MN is associated with humoral alloimmunity and guarded outcome. Potential predisposing factors for recurrent MN include recipients who are older, recipient HLA-A3 antigen, steroid-free immunosuppressive regimen, and living related donor kidney.
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Affiliation(s)
- Ibrahim Batal
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY.
| | - Elena-Rodica Vasilescu
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY
| | - Darshana M Dadhania
- Department of Medicine, Nephrology, Weill Cornell Medical College, New York, NY
| | | | - S Ali Husain
- Department of Medicine, Nephrology, Columbia University Irving Medical Center, New York, NY
| | - Rupali Avasare
- Department of Medicine, Nephrology, Oregon Health & Science University, Portland, OR
| | - Geo Serban
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY
| | - Dominick Santoriello
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY
| | - Pascale Khairallah
- Department of Medicine, Nephrology, Columbia University Irving Medical Center, New York, NY
| | - Ankita Patel
- Department of Medicine, Nephrology, Hackensack University Medical Center, Hackensack, NJ
| | - Michael J Moritz
- Department of Surgery, Lehigh Valley Health Network, Allentown, PA
| | - Eva Latulippe
- Department of Pathology, University Health Center of Quebec, Laval University, Québec, QC, Canada
| | - Julie Riopel
- Department of Pathology, University Health Center of Quebec, Laval University, Québec, QC, Canada
| | - Karim Khallout
- Paris Translational Research Center for Organ Transplantation, INSERM, UMR-S970, Paris, France
| | | | - Andrew S Bomback
- Department of Medicine, Nephrology, Columbia University Irving Medical Center, New York, NY
| | - Sumit Mohan
- Department of Medicine, Nephrology, Columbia University Irving Medical Center, New York, NY; Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY
| | - Lloyd Ratner
- Department of Surgery, Columbia University Irving Medical Center, New York, NY
| | - Jai Radhakrishnan
- Department of Medicine, Nephrology, Columbia University Irving Medical Center, New York, NY
| | - David J Cohen
- Department of Medicine, Nephrology, Columbia University Irving Medical Center, New York, NY
| | - Gerald B Appel
- Department of Medicine, Nephrology, Columbia University Irving Medical Center, New York, NY
| | - Michael B Stokes
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY
| | - Glen S Markowitz
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY
| | - Surya V Seshan
- Department of Pathology and Laboratory Medicine, Weill Cornell Medical College, New York, NY
| | - Sacha A De Serres
- Renal Division, Department of Medicine, University Health Center of Quebec, Laval University, Québec, QC, Canada
| | - Nicole Andeen
- Department of Pathology, Oregon Health & Science University, Portland, OR
| | - Alexandre Loupy
- Paris Translational Research Center for Organ Transplantation, INSERM, UMR-S970, Paris, France
| | - Krzysztof Kiryluk
- Department of Medicine, Nephrology, Columbia University Irving Medical Center, New York, NY
| | - Vivette D D'Agati
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY
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Leon J, Pérez-Sáez MJ, Batal I, Beck LH, Rennke HG, Canaud G, Legendre C, Pascual J, Riella LV. Membranous Nephropathy Posttransplantation: An Update of the Pathophysiology and Management. Transplantation 2019; 103:1990-2002. [PMID: 31568231 DOI: 10.1097/tp.0000000000002758] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Membranous nephropathy (MN) is a common cause of nephrotic syndrome after transplantation and is associated with an increased risk of allograft loss. MN may occur either as a recurrent or as a de novo disease. As in native kidneys, the pathophysiology of the MN recurrence is in most cases associated with antiphospholipid A2 receptor antibodies. However, the posttransplant course has some distinct features when compared with primary MN, including a lower chance of spontaneous remission and a greater requirement for adjuvant immunosuppressive therapy to induce complete remission. Although the efficacy of rituximab in primary MN is now well established, no randomized studies have assessed its effectiveness in MN after transplant, and there are no specific recommendations for the management of these patients. This review aims to synthesize and update the pathophysiology of posttransplant MN, as well as to address unsolved issues specific to transplantation, including the prognostic value of antiphospholipid A2 receptor, the risk of living-related donation, the link between de novo MN and rejection, and different therapeutic strategies so far deployed in posttransplant MN. Lastly, we propose a management algorithm for patients with MN who are planning to receive a kidney transplant, including pretransplant considerations, posttransplant monitoring, and the clinical approach after the diagnosis of recurrence.
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Affiliation(s)
- Juliette Leon
- Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
- Department of Nephrology-Transplantation, Necker Hospital, APHP, Paris, France
| | - María José Pérez-Sáez
- Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
- Nephrology Department, Hospital del Mar, Barcelona, Spain
| | - Ibrahim Batal
- Pathology and Cell Biology, Columbia University Medical Center, New York, NY
| | - Laurence H Beck
- Division of Nephrology, Boston Medical Center, Boston University School of Medicine, Boston, MA
| | - Helmut G Rennke
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Guillaume Canaud
- Department of Nephrology-Transplantation, Necker Hospital, APHP, Paris, France
| | - Christophe Legendre
- Department of Nephrology-Transplantation, Necker Hospital, APHP, Paris, France
| | - Julio Pascual
- Nephrology Department, Hospital del Mar, Barcelona, Spain
| | - Leonardo V Riella
- Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
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Passerini P, Malvica S, Tripodi F, Cerutti R, Messa P. Membranous Nephropathy (MN) Recurrence After Renal Transplantation. Front Immunol 2019; 10:1326. [PMID: 31244861 PMCID: PMC6581671 DOI: 10.3389/fimmu.2019.01326] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 05/24/2019] [Indexed: 11/22/2022] Open
Abstract
Primary membranous nephropathy (MN) is a frequent cause of NS in adults. In native kidneys the disease may progress to ESRD in the long term, in some 40–50% of untreated patients. The identification of the pathogenic role of anti-podocyte autoantibodies and the development of new therapeutic options has achieved an amelioration in the prognosis of this disease. MN may also develop in renal allograft as a recurrent or a de novo disease. Since the de novo MN may have some different pathogenetic and morphologic features compared to recurrent MN, in the present paper we will deal only with the recurrent disease. The true incidence of the recurrent form is difficult to assess. This is mainly due to the variable graft biopsy policies in kidney transplantation, among the different transplant centers. Anti-phospholipase A2 receptor (PLA2R) autoantibodies are detected in 70–80% of patients. The knowledge of anti-PLA2R status before transplant is useful in predicting the risk of recurrence. In addition, the serial survey of the anti-PLA2R titers is important to assess the rate of disease progression and the response to treatment. Currently, there are no established guidelines for prevention and treatment of recurrent MN. Symptomatic therapy may help to reduce the signs and symptoms related to the nephrotic syndrome. Anecdotal cases of response to cyclical therapy with steroids and cyclophosphamide have been published. Promising results have been reported with rituximab in both prophylaxis and treatment of recurrence. However, these results are based on observational data, and prospective controlled trials are still missing.
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Affiliation(s)
- Patrizia Passerini
- Dialysis, and Renal Transplant Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Silvia Malvica
- Dialysis, and Renal Transplant Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Federica Tripodi
- Dialysis, and Renal Transplant Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Roberta Cerutti
- Dialysis, and Renal Transplant Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Piergiorgio Messa
- Dialysis, and Renal Transplant Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.,Department of Clinical Science and Community, Università degli Studi di Milano, Milan, Italy
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9
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Filippone EJ, Farber JL. Membranous nephropathy in the kidney allograft. Clin Transplant 2016; 30:1394-1402. [DOI: 10.1111/ctr.12847] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/12/2016] [Indexed: 01/29/2023]
Affiliation(s)
- Edward J. Filippone
- Division of Nephrology; Department of Medicine; Sydney Kimmel Medical College at Thomas Jefferson University; Philadelphia PA USA
| | - John L. Farber
- Department of Pathology; Sydney Kimmel Medical College at Thomas Jefferson University; Philadelphia PA USA
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Francis JM, Beck LH, Salant DJ. Membranous Nephropathy: A Journey From Bench to Bedside. Am J Kidney Dis 2016; 68:138-47. [PMID: 27085376 PMCID: PMC4921260 DOI: 10.1053/j.ajkd.2016.01.030] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Accepted: 01/31/2016] [Indexed: 12/28/2022]
Abstract
Lessons from an animal model that faithfully resembles human membranous nephropathy (MN) have informed our understanding of the pathogenesis of this organ-specific autoimmune disease and common cause of nephrotic syndrome. After it was established that the subepithelial immune deposits that characterize experimental MN form in situ when circulating antibodies bind to an intrinsic podocyte antigen, it was merely a matter of time before the human antigen was identified. The M-type phospholipase A2 receptor 1 (PLA2R) represents the major target antigen in primary MN, and thrombospondin type 1 domain-containing 7A (THSD7A) was more recently identified as a minor antigen. Serologic tests for anti-PLA2R and kidney biopsy specimen staining for PLA2R show >90% specificity and 70% to 80% sensitivity for the diagnosis of primary MN in most populations. The assays distinguish most cases of primary MN from MN associated with other systemic diseases, and sequential anti-PLA2R titers are useful to monitor treatment response. A positive pretransplantation test result for anti-PLA2R is also helpful for predicting the risk for posttransplantation recurrence. Identification of target epitopes within PLA2R and the genetic association of primary MN with class II major histocompatibility and PLA2R1 variants are 2 additional examples of our evolving understanding of this disease.
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Affiliation(s)
- Jean M Francis
- Department of Medicine, Boston University Medical Center, Boston, MA
| | - Laurence H Beck
- Department of Medicine, Boston University Medical Center, Boston, MA
| | - David J Salant
- Department of Medicine, Boston University Medical Center, Boston, MA.
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12
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Kattah A, Ayalon R, Beck LH, Sandor DG, Cosio FG, Gandhi MJ, Sethi S, Lorenz EC, Salant DJ, Fervenza FC. Anti-phospholipase A₂ receptor antibodies in recurrent membranous nephropathy. Am J Transplant 2015; 15:1349-59. [PMID: 25766759 PMCID: PMC4472303 DOI: 10.1111/ajt.13133] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 11/06/2014] [Accepted: 11/20/2014] [Indexed: 01/25/2023]
Abstract
About 70% of patients with primary membranous nephropathy (MN) have circulating anti-phospholipase A2 receptor (PLA2R) antibodies that correlate with disease activity, but their predictive value in post-transplant (Tx) recurrent MN is uncertain. We evaluated 26 patients, 18 with recurrent MN and 8 without recurrence, with serial post-Tx serum samples and renal biopsies to determine if patients with pre-Tx anti-PLA2R are at increased risk of recurrence as compared to seronegative patients and to determine if post-Tx changes in anti-PLA2R correspond to the clinical course. In the recurrent group, 10/17 patients had anti-PLA2R at the time of Tx versus 2/7 patients in the nonrecurrent group. The positive predictive value of pre-Tx anti-PLA2R for recurrence was 83%, while the negative predictive value was 42%. Persistence or reappearance of post-Tx anti-PLA2R was associated with increasing proteinuria and resistant disease in 6/18 cases; little or no proteinuria occurred in cases with pre-Tx anti-PLA2R and biopsy evidence of recurrence in which the antibodies resolved with standard immunosuppression. Some cases with positive pre-Tx anti-PLA2R were seronegative at the time of recurrence. In conclusion, patients with positive pre-Tx anti-PLA2R should be monitored closely for recurrent MN. Persistence or reappearance of antibody post-Tx may indicate a more resistant disease.
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Affiliation(s)
- Andrea Kattah
- Department of Nephrology and Hypertension, Mayo Clinic, Rochester, MN
| | - Rivka Ayalon
- Department of Medicine, Section of Nephrology, Boston University School of Medicine, Boston, MA
| | - Laurence H. Beck
- Department of Medicine, Section of Nephrology, Boston University School of Medicine, Boston, MA
| | - Dana G. Sandor
- Department of Medicine, Section of Nephrology, Boston University School of Medicine, Boston, MA
| | - Fernando G. Cosio
- Department of Nephrology and Hypertension, Mayo Clinic, Rochester, MN
| | | | | | | | - David J. Salant
- Department of Medicine, Section of Nephrology, Boston University School of Medicine, Boston, MA
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Phospholipase A2 receptor (PLA2R) staining is useful in the determination of de novo versus recurrent membranous glomerulopathy. Transplantation 2013; 95:1259-62. [PMID: 23514961 DOI: 10.1097/tp.0b013e31828a947b] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND Membranous glomerulopathy (MG) is one of the most common glomerulonephritides involving the renal transplant. We sought to determine the utility of phospholipase A2 receptor (PLA2R) staining for the detection of recurrent MG. We also evaluated for increased evidence of antibody-mediated rejection in the de novo group, as some have reported. METHODS Twenty-two cases of MG occurring in renal transplant biopsies were identified, who had a tissue diagnosis documenting the primary native renal disease. There were 12 biopsies from 11 patients with recurrent MG and 12 biopsies from 11 patients with de novo MG. Morphologic evaluation and PLA2R staining was performed in all cases. RESULTS Ten of 12 (83%) recurrent MG and 1 of 12 (8%) de novo MG biopsies showed positive glomerular staining for PLA2R, giving PLA2R a sensitivity of 83% (95% confidence interval, 51%-97%) and specificity of 92% (95% confidence interval, 60%-100%) for recurrent MG. There were 2 of 12 (17%) de novo and 1 of 12 (8%) recurrent biopsies showing the presence of microcirculation inflammation. Peritubular capillary C4d staining was negative in all cases. CONCLUSION Recurrent MG is strongly correlated with PLA2R positivity, with a sensitivity of 83% and specificity of 92% for recurrent MG. There was no morphologic evidence of an association between antibody-mediated rejection and de novo MG, because both groups had a similar degree of microcirculation inflammation and peritubular capillary C4d staining. Most interestingly, PLA2R staining was almost always negative in de novo MG, suggesting a different mechanism in this unique form of MG.
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