Amphiregulin Aggravates Glomerulonephritis via Recruitment and Activation of Myeloid Cells
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Amphiregulin Aggravates Glomerulonephritis via Recruitment and Activation of Myeloid Cells. / Melderis, Simon; Hagenstein, Julia; Warkotsch, Matthias Tobias; Dang, Julien; Herrnstadt, Georg Rudolf; Niehus, Christoph Benjamin; Neumann, Katrin; Panzer, Ulf; Berasain, Carmen; Avila, Matias A; Tharaux, Pierre-Louis; Tiegs, Gisa; Steinmetz, Oliver M.
In: J AM SOC NEPHROL, Vol. 31, No. 9, 09.2020, p. 1996-2012.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Amphiregulin Aggravates Glomerulonephritis via Recruitment and Activation of Myeloid Cells
AU - Melderis, Simon
AU - Hagenstein, Julia
AU - Warkotsch, Matthias Tobias
AU - Dang, Julien
AU - Herrnstadt, Georg Rudolf
AU - Niehus, Christoph Benjamin
AU - Neumann, Katrin
AU - Panzer, Ulf
AU - Berasain, Carmen
AU - Avila, Matias A
AU - Tharaux, Pierre-Louis
AU - Tiegs, Gisa
AU - Steinmetz, Oliver M
N1 - Copyright © 2020 by the American Society of Nephrology.
PY - 2020/9
Y1 - 2020/9
N2 - BACKGROUND: Recent studies have identified the EGF receptor (EGFR) ligand amphiregulin (AREG) as an important mediator of inflammatory diseases. Both pro- and anti-inflammatory functions have been described, but the role of AREG in GN remains unknown.METHODS: The nephrotoxic nephritis model of GN was studied in AREG-/- mice after bone marrow transplantation, and in mice with myeloid cell-specific EGFR deficiency. Therapeutic utility of AREG neutralization was assessed. Furthermore, AREG's effects on renal cells and monocytes/macrophages (M/M) were analyzed. Finally, we evaluated AREG expression in human renal biopsies.RESULTS: Renal AREG mRNA was strongly upregulated in murine GN. Renal resident cells were the most functionally relevant source of AREG. Importantly, the observation that knockout mice showed significant amelioration of disease indicates that AREG is pathogenic in GN. AREG enhanced myeloid cell responses via inducing chemokine and colony stimulating factor 2 (CSF2) expression in kidney resident cells. Furthermore, AREG directly skewed M/M to a proinflammatory M1 phenotype and protected them from apoptosis. Consequently, anti-AREG antibody treatment dose-dependently ameliorated GN. Notably, selective abrogation of EGFR signaling in myeloid cells was sufficient to protect against nephritis. Finally, strong upregulation of AREG expression was also detected in kidneys of patients with two forms of crescentic GN.CONCLUSIONS: AREG is a proinflammatory mediator of GN via (1) enhancing renal pathogenic myeloid cell infiltration and (2) direct effects on M/M polarization, proliferation, and cytokine secretion. The AREG/EGFR axis is a potential therapeutic target for acute GN.
AB - BACKGROUND: Recent studies have identified the EGF receptor (EGFR) ligand amphiregulin (AREG) as an important mediator of inflammatory diseases. Both pro- and anti-inflammatory functions have been described, but the role of AREG in GN remains unknown.METHODS: The nephrotoxic nephritis model of GN was studied in AREG-/- mice after bone marrow transplantation, and in mice with myeloid cell-specific EGFR deficiency. Therapeutic utility of AREG neutralization was assessed. Furthermore, AREG's effects on renal cells and monocytes/macrophages (M/M) were analyzed. Finally, we evaluated AREG expression in human renal biopsies.RESULTS: Renal AREG mRNA was strongly upregulated in murine GN. Renal resident cells were the most functionally relevant source of AREG. Importantly, the observation that knockout mice showed significant amelioration of disease indicates that AREG is pathogenic in GN. AREG enhanced myeloid cell responses via inducing chemokine and colony stimulating factor 2 (CSF2) expression in kidney resident cells. Furthermore, AREG directly skewed M/M to a proinflammatory M1 phenotype and protected them from apoptosis. Consequently, anti-AREG antibody treatment dose-dependently ameliorated GN. Notably, selective abrogation of EGFR signaling in myeloid cells was sufficient to protect against nephritis. Finally, strong upregulation of AREG expression was also detected in kidneys of patients with two forms of crescentic GN.CONCLUSIONS: AREG is a proinflammatory mediator of GN via (1) enhancing renal pathogenic myeloid cell infiltration and (2) direct effects on M/M polarization, proliferation, and cytokine secretion. The AREG/EGFR axis is a potential therapeutic target for acute GN.
U2 - 10.1681/ASN.2019111215
DO - 10.1681/ASN.2019111215
M3 - SCORING: Journal article
C2 - 32616537
VL - 31
SP - 1996
EP - 2012
JO - J AM SOC NEPHROL
JF - J AM SOC NEPHROL
SN - 1046-6673
IS - 9
ER -