Anti-GBM glomerulonephritis involves IL-1 but is independent of NLRP3/ASC inflammasome-mediated activation of caspase-1
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Anti-GBM glomerulonephritis involves IL-1 but is independent of NLRP3/ASC inflammasome-mediated activation of caspase-1. / Lichtnekert, Julia; Kulkarni, Onkar P; Mulay, Shrikant R; Rupanagudi, Khader Valli; Ryu, Mi; Allam, Ramanjaneyulu; Vielhauer, Volker; Muruve, Dan; Lindenmeyer, Maja T; Cohen, Clemens D; Anders, Hans-Joachim.
in: PLOS ONE, Jahrgang 6, Nr. 10, 2011, S. e26778.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - Anti-GBM glomerulonephritis involves IL-1 but is independent of NLRP3/ASC inflammasome-mediated activation of caspase-1
AU - Lichtnekert, Julia
AU - Kulkarni, Onkar P
AU - Mulay, Shrikant R
AU - Rupanagudi, Khader Valli
AU - Ryu, Mi
AU - Allam, Ramanjaneyulu
AU - Vielhauer, Volker
AU - Muruve, Dan
AU - Lindenmeyer, Maja T
AU - Cohen, Clemens D
AU - Anders, Hans-Joachim
PY - 2011
Y1 - 2011
N2 - IL-1β and IL-18 are proinflammatory cytokines that contribute to renal immune complex disease, but whether IL-1β and IL-18 are mediators of intrinsic glomerular inflammation is unknown. In contrast to other cytokines the secretion of IL-1β and IL-18 requires a second stimulus that activates the inflammasome-ASC-caspase-1 pathway to cleave pro-IL-1β and -IL-18 into their mature and secretable forms. As the NLRP3 inflammasome and caspase-1 were shown to contribute to postischemic and postobstructive tubulointerstitial inflammation, we hypothesized a similar role for NLRP3, ASC, and caspase-1 in glomerular immunopathology. This concept was supported by the finding that lack of IL-1R1 reduced antiserum-induced focal segmental necrosis, crescent formation, and tubular atrophy when compared to wildtype mice. Lack of IL-18 reduced tubular atrophy only. However, NLRP3-, ASC- or caspase-1-deficiency had no significant effect on renal histopathology or proteinuria of serum nephritis. In vitro studies with mouse glomeruli or mesangial cells, glomerular endothelial cells, and podocytes did not reveal any pro-IL-1β induction upon LPS stimulation and no caspase-1 activation after an additional exposure to the NLRP3 agonist ATP. Only renal dendritic cells, which reside mainly in the tubulointerstitium, expressed pro-IL-1β and were able to activate the NLRP3-caspase-1 axis and secrete mature IL-1β. Together, the NLRP3-ASC-caspase-1 axis does not contribute to intrinsic glomerular inflammation via glomerular parenchymal cells as these cannot produce IL-1β during sterile inflammation.
AB - IL-1β and IL-18 are proinflammatory cytokines that contribute to renal immune complex disease, but whether IL-1β and IL-18 are mediators of intrinsic glomerular inflammation is unknown. In contrast to other cytokines the secretion of IL-1β and IL-18 requires a second stimulus that activates the inflammasome-ASC-caspase-1 pathway to cleave pro-IL-1β and -IL-18 into their mature and secretable forms. As the NLRP3 inflammasome and caspase-1 were shown to contribute to postischemic and postobstructive tubulointerstitial inflammation, we hypothesized a similar role for NLRP3, ASC, and caspase-1 in glomerular immunopathology. This concept was supported by the finding that lack of IL-1R1 reduced antiserum-induced focal segmental necrosis, crescent formation, and tubular atrophy when compared to wildtype mice. Lack of IL-18 reduced tubular atrophy only. However, NLRP3-, ASC- or caspase-1-deficiency had no significant effect on renal histopathology or proteinuria of serum nephritis. In vitro studies with mouse glomeruli or mesangial cells, glomerular endothelial cells, and podocytes did not reveal any pro-IL-1β induction upon LPS stimulation and no caspase-1 activation after an additional exposure to the NLRP3 agonist ATP. Only renal dendritic cells, which reside mainly in the tubulointerstitium, expressed pro-IL-1β and were able to activate the NLRP3-caspase-1 axis and secrete mature IL-1β. Together, the NLRP3-ASC-caspase-1 axis does not contribute to intrinsic glomerular inflammation via glomerular parenchymal cells as these cannot produce IL-1β during sterile inflammation.
KW - Animals
KW - Autoantibodies
KW - Carrier Proteins
KW - Caspase 1
KW - Cytokines
KW - Enzyme Activation
KW - Glomerulonephritis
KW - Inflammasomes
KW - Inflammation
KW - Interleukin-1
KW - Interleukin-1beta
KW - Mice
KW - NLR Family, Pyrin Domain-Containing 3 Protein
KW - Journal Article
KW - Research Support, Non-U.S. Gov't
U2 - 10.1371/journal.pone.0026778
DO - 10.1371/journal.pone.0026778
M3 - SCORING: Journal article
C2 - 22046355
VL - 6
SP - e26778
JO - PLOS ONE
JF - PLOS ONE
SN - 1932-6203
IS - 10
ER -