Article (Scientific journals)
Peroxisome proliferator-activated receptor gamma agonists protect cerebellar granule cells from cytokine-induced apoptotic cell death by inhibition of inducible nitric oxide synthase.
HENEKA, Michael; Feinstein, D L; Galea, Elena et al.
1999In Journal of Neuroimmunology, 100 (1-2), p. 156 - 168
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Keywords :
2-amino-5,6-dihydro-6-methyl-4H-1,3-thiazine; Cytokines; Enzyme Inhibitors; Lipopolysaccharides; Prostaglandins, Synthetic; Receptors, Cytoplasmic and Nuclear; Thiazines; Transcription Factors; 9-deoxy-delta-9-prostaglandin D2; Nitric Oxide Synthase; Nitric Oxide Synthase Type II; Nos2 protein, rat; Casp3 protein, rat; Caspase 3; Caspases; Prostaglandin D2; Animals; Apoptosis/drug effects; Blotting, Western; Caspases/biosynthesis; Cell Survival/drug effects; Cerebellum/cytology; Cerebellum/drug effects; Cerebellum/enzymology; Cytokines/metabolism; Enzyme Inhibitors/pharmacology; Immunohistochemistry; In Situ Nick-End Labeling; Lipopolysaccharides/pharmacology; Neurons/drug effects; Neurons/enzymology; Nitric Oxide Synthase/antagonists & inhibitors; Nitric Oxide Synthase/biosynthesis; Prostaglandin D2/analogs & derivatives; Prostaglandin D2/pharmacology; Prostaglandins, Synthetic/pharmacology; Rats; Rats, Sprague-Dawley; Receptors, Cytoplasmic and Nuclear/agonists; Reverse Transcriptase Polymerase Chain Reaction; Thiazines/pharmacology; Time Factors; Transcription Factors/agonists; Alzheimer's Disease; Cerebellar granule neurons; iNOS; NSAIDs; PPARγ; Immunology and Allergy; Immunology; Neurology; Neurology (clinical); PPAR gamma
Abstract :
[en] Cerebellar granule cells (CGCs) can express the inducible isoform of nitric oxide synthase (iNOS) in response to inflammatory stimuli. We demonstrate that induction of iNOS in CGCs by bacterial lipopolysaccharide and pro-inflammatory cytokines results in cell death that was potentiated by excess L-arginine and inhibited by the selective iNOS inhibitor, 2-amino-5,6-dihydro-6-methyl-4H-1,3-thiazine. The NO-mediated cell death was accompanied by increased caspase-3-like activity, DNA fragmentation and positive terminal transferase dUTP nick end labeling (TUNEL), suggesting that apoptosis mediates CGC cell death. Incubation of CGCs with the non-steroidal anti-inflammatory drugs (NSAIDs), ibuprofen or indomethacin, or with 15-deoxy-delta12,14 prostaglandin J2 (PGJ2) downregulates iNOS expression and reduces subsequent cell death. Since in other cell types, both NSAIDs and PGJ2 can activate the peroxisome proliferator-activated receptor-gamma (PPARgamma) and downregulate cytokine levels and iNOS expression, and since CGCs express PPARgamma in vivo and in vitro, our data suggest that activation of CGC PPARgamma mediates iNOS suppression and reduced cell death. Because PPARgamma is expressed in brains of Alzheimer's Disease (AD) patients, in which neuronal iNOS expression and apoptotic cell death have been described, these results may help explain the basis for the beneficial effects of NSAIDs in AD.
Disciplines :
Neurology
Author, co-author :
HENEKA, Michael  ;  Department of Neurology, University of Bonn, Germany. heneka@uni-bonn.de
Feinstein, D L
Galea, Elena;  Department of Anesthesiology, Neuroanesthesia Res., Univ. I., Chicago, IL, United States
Gleichmann, Marc;  Department of Neurology, University of Tübingen, Tübingen, Germany
Wüllner, Ullrich;  Department of Neurology, University of Bonn, Bonn, Germany
Klockgether, Thomas;  Department of Neurology, University of Bonn, Bonn, Germany
External co-authors :
yes
Language :
English
Title :
Peroxisome proliferator-activated receptor gamma agonists protect cerebellar granule cells from cytokine-induced apoptotic cell death by inhibition of inducible nitric oxide synthase.
Publication date :
December 1999
Journal title :
Journal of Neuroimmunology
ISSN :
0165-5728
eISSN :
1872-8421
Publisher :
Elsevier BV, Netherlands
Volume :
100
Issue :
1-2
Pages :
156 - 168
Peer reviewed :
Peer Reviewed verified by ORBi
Funding text :
This study was supported by a grant from the Deutsche Forschungsgemeinschaft (SFB 430, B7) and a grant from the National Multiple Sclerosis Society (to D.L.F.).
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