Adenoviral gene delivery of elafin and secretory leukocyte protease inhibitor attenuates NF-kappa B-dependent inflammatory responses of human endothelial cells and macrophages to atherogenic stimuli.
Atherosclerosis is a chronic inflammatory disease affecting arterial vessels. Strategies to reduce the inflammatory responses of endothelial cells and macrophages may slow lesion development and prevent complications such as plaque rupture. The human protease human neutrophil elastase (HNE), oxidized low density lipoprotein, LPS, and TNF-alpha were chosen as model stimuli of arterial wall inflammation and led to production of the chemokine IL-8 in endothelial cells. To counteract the activity of HNE, we have examined the effects of adenoviral gene delivery of the anti-elastases elafin, previously demonstrated within human atheroma, and murine secretory leukocyte protease inhibitor (SLPI), a related molecule, on the inflammatory responses of human endothelial cells and macrophages to atherogenic stimuli. We developed a technique of precomplexing adenovirus with cationic lipid to augment adenoviral infection efficiency in endothelial cells and to facilitate infection in macrophages. Elafin overexpression protected endothelial cells from HNE-induced IL-8 production and cytotoxicity. Elafin and murine SLPI also reduced endothelial IL-8 release in response to oxidized low density lipoprotein, LPS, and TNF-alpha and macrophage TNF-alpha production in response to LPS. This effect was associated with reduced activation of the inflammatory transcription factor NF-kappaB, through up-regulation of IkappaBalpha, in both cell types. Our work suggests a novel and extended anti-inflammatory role for these HNE inhibitors working as effectors of innate immunity to protect tissues against maladaptive inflammatory responses. Our findings indicate that elafin and SLPI may be gene therapy targets for the treatment of atheroma.
Henriksen
Peter A
PA
Rayne Laboratory, Medical Research Council Centre for Inflammation Research, Medical School, University of Edinburgh, Edinburgh, United Kingdom.
Hitt
Mary
M
Xing
Zhou
Z
Wang
Jun
J
Haslett
Chris
C
Riemersma
Rudolph A
RA
Webb
David J
DJ
Kotelevtsev
Yuri V
YV
Sallenave
Jean-Michel
JM
D000256:Adenoviridae / Q000235:genetics*; D000818:Animals; D001161:Arteriosclerosis / Q000201:enzymology / Q000235:genetics / Q000473:pathology* / Q000517:prevention & control*; D002412:Cations; D002460:Cell Line; D016207:Cytokines / Q000037:antagonists & inhibitors / Q000096:biosynthesis; D004730:Endothelium, Vascular / Q000276:immunology / Q000378:metabolism / Q000473:pathology*; D006801:Humans; D020672:I-kappa B Proteins / Q000037:antagonists & inhibitors / Q000378:metabolism; D016209:Interleukin-8 / Q000096:biosynthesis; D019272:Leukocyte Elastase / Q000037:antagonists & inhibitors / Q000494:pharmacology; D008070:Lipopolysaccharides / Q000494:pharmacology; D008077:Lipoproteins, LDL / Q000494:pharmacology; D008081:Liposomes; D008168:Lung / Q000276:immunology / Q000378:metabolism / Q000473:pathology; D008264:Macrophages / Q000378:metabolism / Q000473:pathology*; D051379:Mice; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D000072000:NF-KappaB Inhibitor alpha; D016328:NF-kappa B / Q000037:antagonists & inhibitors / Q000502:physiology*; D053491:Proteinase Inhibitory Proteins, Secretory; D011506:Proteins / Q000235:genetics* / Q000502:physiology; D020545:Respiratory Mucosa / Q000276:immunology / Q000378:metabolism / Q000473:pathology; D053481:Secretory Leukocyte Peptidase Inhibitor; D014162:Transfection / Q000379:methods*; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology; D015854:Up-Regulation / Q000276:immunology
D002412:Cations; D016207:Cytokines; D020672:I-kappa B Proteins; D016209:Interleukin-8; D008070:Lipopolysaccharides; D008077:Lipoproteins, LDL; D008081:Liposomes; D016328:NF-kappa B; C000606204:NFKBIA protein, human; C000606205:Nfkbia protein, mouse; D053491:Proteinase Inhibitory Proteins, Secretory; D011506:Proteins; C506814:SLPI protein, human; D053481:Secretory Leukocyte Peptidase Inhibitor; C506815:Slpi protein, mouse; D014409:Tumor Necrosis Factor-alpha; C099252:oxidized low density lipoprotein; D000072000:NF-KappaB Inhibitor alpha; D019272:Leukocyte Elastase