Introduction of a novel chimeric active immunization mouse model of PLA2R1-associated membranous nephropathy
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Introduction of a novel chimeric active immunization mouse model of PLA2R1-associated membranous nephropathy. / Tomas, Nicola M; Schnarre, Annabel; Dehde, Silke; Lucas, Renke; Hermans-Borgmeyer, Irm; Kretz, Oliver; Koellner, Sarah M S; Wiech, Thorsten; Koch-Nolte, Friedrich; Seifert, Larissa; Huber, Tobias B; Zahner, Gunther.
in: KIDNEY INT, Jahrgang 104, Nr. 5, 11.2023, S. 916-928.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - Introduction of a novel chimeric active immunization mouse model of PLA2R1-associated membranous nephropathy
AU - Tomas, Nicola M
AU - Schnarre, Annabel
AU - Dehde, Silke
AU - Lucas, Renke
AU - Hermans-Borgmeyer, Irm
AU - Kretz, Oliver
AU - Koellner, Sarah M S
AU - Wiech, Thorsten
AU - Koch-Nolte, Friedrich
AU - Seifert, Larissa
AU - Huber, Tobias B
AU - Zahner, Gunther
N1 - Copyright © 2023 International Society of Nephrology. Published by Elsevier Inc. All rights reserved.
PY - 2023/11
Y1 - 2023/11
N2 - The phospholipase A2 receptor 1 (PLA2R1) is the major target antigen in patients with membranous nephropathy (MN), an antibody-mediated autoimmune glomerular disease. Investigation of MN pathogenesis has been hampered by the lack of reliable animal models. Here, we overcome this issue by generating a transgenic mouse line expressing a chimeric PLA2R1 (chPLA2R1) consisting of three human PLA2R1 domains (cysteine-rich, fibronectin type-II and CTLD1) and seven murine PLA2R1 domains (CTLD2-8) specifically in podocytes. Mice expressing the chPLA2R1 were healthy at birth and showed no major glomerular alterations when compared to mice with a wild-type PLA2R1 status. Upon active immunization with human PLA2R1 (hPLA2R1), chPLA2R1-positive mice developed anti-hPLA2R1 antibodies, a nephrotic syndrome, and all major histological features of MN, including granular deposition of mouse IgG and complement components in immunofluorescence and subepithelial electron-dense deposits and podocyte foot process effacement in electron microscopy. In order to investigate the role of the complement system in this model, we further crossed chPLA2R1-positive mice with mice lacking the central complement component C3 (C3-/- mice). Upon immunization with hPLA2R1, chPLA2R1-positive C3-/- mice had substantially less severe albuminuria and nephrotic syndrome when compared to chPLA2R1-positive mice with a wild-type C3 status. In conclusion, we introduce a novel active immunization model of PLA2R1-associated MN and demonstrate a pathogenic role of the complement system in this model.
AB - The phospholipase A2 receptor 1 (PLA2R1) is the major target antigen in patients with membranous nephropathy (MN), an antibody-mediated autoimmune glomerular disease. Investigation of MN pathogenesis has been hampered by the lack of reliable animal models. Here, we overcome this issue by generating a transgenic mouse line expressing a chimeric PLA2R1 (chPLA2R1) consisting of three human PLA2R1 domains (cysteine-rich, fibronectin type-II and CTLD1) and seven murine PLA2R1 domains (CTLD2-8) specifically in podocytes. Mice expressing the chPLA2R1 were healthy at birth and showed no major glomerular alterations when compared to mice with a wild-type PLA2R1 status. Upon active immunization with human PLA2R1 (hPLA2R1), chPLA2R1-positive mice developed anti-hPLA2R1 antibodies, a nephrotic syndrome, and all major histological features of MN, including granular deposition of mouse IgG and complement components in immunofluorescence and subepithelial electron-dense deposits and podocyte foot process effacement in electron microscopy. In order to investigate the role of the complement system in this model, we further crossed chPLA2R1-positive mice with mice lacking the central complement component C3 (C3-/- mice). Upon immunization with hPLA2R1, chPLA2R1-positive C3-/- mice had substantially less severe albuminuria and nephrotic syndrome when compared to chPLA2R1-positive mice with a wild-type C3 status. In conclusion, we introduce a novel active immunization model of PLA2R1-associated MN and demonstrate a pathogenic role of the complement system in this model.
U2 - 10.1016/j.kint.2023.07.024
DO - 10.1016/j.kint.2023.07.024
M3 - SCORING: Journal article
C2 - 37598854
VL - 104
SP - 916
EP - 928
JO - KIDNEY INT
JF - KIDNEY INT
SN - 0085-2538
IS - 5
ER -