Neutrophil serine proteases mediate inflammatory cell recruitment by glomerular endothelium and progression towards dysfunction

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@article{9ef66e4db1f24faeadc9586cdaf6275e,
title = "Neutrophil serine proteases mediate inflammatory cell recruitment by glomerular endothelium and progression towards dysfunction",
abstract = "BACKGROUND: Neutrophil recruitment into glomerular tissues and reduced capillary wall integrity has been implicated in the development of vasculitic glomerulonephritis (VGN). This study investigated the stages and mechanisms through which neutrophil serine proteases (SPs), proteinase 3 (PR3) or elastase contribute to endothelial dysfunction.METHODS: Protease-induced damage to endothelium and adhesion molecule upregulation was measured by viability assays and ELISA. Neutrophil/platelet adhesion to human glomerular and umbilical vein endothelium was assessed using in vitro adhesion assays.RESULTS: PR3 and elastase (1 µg/mL, 2 h) significantly induced neutrophil adhesion to endothelial cells (EnC) whilst PR3 also enhanced platelet-EnC interactions. This neutrophil adhesion was associated with enhanced P-selectin expression and required CXCL8 receptor involvement, and could be inhibited by blocking the P-selectin ligand PSGL-1. SPs induced damage in a time- and dose-dependent fashion, decreasing cell monolayer integrity followed by cell membrane integrity, inducing caspase-3 activation and p21 cleavage. However, SPs caused significant EnC damage with increasing concentrations and prolonged exposures.CONCLUSION: Neutrophil SPs induce a pro-adhesive phenotype in glomerular endothelium primarily by inducing neutrophil and platelet adhesion that transits to dysfunction after high/prolonged exposures. Dysregulated release of these enzymes within glomeruli may contribute to injury during diseases such as VGN.",
keywords = "Humans, Inflammation, Kidney Glomerulus, Myeloblastin, Neutrophil Infiltration, Pancreatic Elastase, Urothelium",
author = "Kuravi, {Sahithi J} and Anne Bevins and Satchell, {Simon C} and Lorraine Harper and Williams, {Julie M} and Rainger, {G Ed} and Savage, {Caroline O S} and Tull, {Samantha P}",
year = "2012",
month = dec,
doi = "10.1093/ndt/gfs180",
language = "English",
volume = "27",
pages = "4331--8",
journal = "Nephrology, Dialysis, Transplantation",
issn = "0931-0509",
publisher = "Oxford University Press",
number = "12",

}

RIS

TY - JOUR

T1 - Neutrophil serine proteases mediate inflammatory cell recruitment by glomerular endothelium and progression towards dysfunction

AU - Kuravi, Sahithi J

AU - Bevins, Anne

AU - Satchell, Simon C

AU - Harper, Lorraine

AU - Williams, Julie M

AU - Rainger, G Ed

AU - Savage, Caroline O S

AU - Tull, Samantha P

PY - 2012/12

Y1 - 2012/12

N2 - BACKGROUND: Neutrophil recruitment into glomerular tissues and reduced capillary wall integrity has been implicated in the development of vasculitic glomerulonephritis (VGN). This study investigated the stages and mechanisms through which neutrophil serine proteases (SPs), proteinase 3 (PR3) or elastase contribute to endothelial dysfunction.METHODS: Protease-induced damage to endothelium and adhesion molecule upregulation was measured by viability assays and ELISA. Neutrophil/platelet adhesion to human glomerular and umbilical vein endothelium was assessed using in vitro adhesion assays.RESULTS: PR3 and elastase (1 µg/mL, 2 h) significantly induced neutrophil adhesion to endothelial cells (EnC) whilst PR3 also enhanced platelet-EnC interactions. This neutrophil adhesion was associated with enhanced P-selectin expression and required CXCL8 receptor involvement, and could be inhibited by blocking the P-selectin ligand PSGL-1. SPs induced damage in a time- and dose-dependent fashion, decreasing cell monolayer integrity followed by cell membrane integrity, inducing caspase-3 activation and p21 cleavage. However, SPs caused significant EnC damage with increasing concentrations and prolonged exposures.CONCLUSION: Neutrophil SPs induce a pro-adhesive phenotype in glomerular endothelium primarily by inducing neutrophil and platelet adhesion that transits to dysfunction after high/prolonged exposures. Dysregulated release of these enzymes within glomeruli may contribute to injury during diseases such as VGN.

AB - BACKGROUND: Neutrophil recruitment into glomerular tissues and reduced capillary wall integrity has been implicated in the development of vasculitic glomerulonephritis (VGN). This study investigated the stages and mechanisms through which neutrophil serine proteases (SPs), proteinase 3 (PR3) or elastase contribute to endothelial dysfunction.METHODS: Protease-induced damage to endothelium and adhesion molecule upregulation was measured by viability assays and ELISA. Neutrophil/platelet adhesion to human glomerular and umbilical vein endothelium was assessed using in vitro adhesion assays.RESULTS: PR3 and elastase (1 µg/mL, 2 h) significantly induced neutrophil adhesion to endothelial cells (EnC) whilst PR3 also enhanced platelet-EnC interactions. This neutrophil adhesion was associated with enhanced P-selectin expression and required CXCL8 receptor involvement, and could be inhibited by blocking the P-selectin ligand PSGL-1. SPs induced damage in a time- and dose-dependent fashion, decreasing cell monolayer integrity followed by cell membrane integrity, inducing caspase-3 activation and p21 cleavage. However, SPs caused significant EnC damage with increasing concentrations and prolonged exposures.CONCLUSION: Neutrophil SPs induce a pro-adhesive phenotype in glomerular endothelium primarily by inducing neutrophil and platelet adhesion that transits to dysfunction after high/prolonged exposures. Dysregulated release of these enzymes within glomeruli may contribute to injury during diseases such as VGN.

KW - Humans

KW - Inflammation

KW - Kidney Glomerulus

KW - Myeloblastin

KW - Neutrophil Infiltration

KW - Pancreatic Elastase

KW - Urothelium

U2 - 10.1093/ndt/gfs180

DO - 10.1093/ndt/gfs180

M3 - Article

C2 - 22785107

VL - 27

SP - 4331

EP - 4338

JO - Nephrology, Dialysis, Transplantation

JF - Nephrology, Dialysis, Transplantation

SN - 0931-0509

IS - 12

ER -