| Inhibitors of poly (ADP-ribose) polymerase modulate signal transduction pathways in colitis. | |
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MedLine Citation:
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PMID: 12782201 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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During inflammatory bowel diseases, oxidative and nitrosative stress induces DNA damage and activation of the nuclear enzyme poly (ADP-ribose) polymerase (PARP), resulting in depletion of intracellular energetics, intestinal barrier dysfunction and cellular death. The aim of our study was to evaluate the therapeutic efficacy of in vivo inhibition of PARP in experimental colitis, which was induced by rectal instillation of trinitrobenzene sulfonic acid (TNBS) in rats. In vehicle-treated rats, TNBS treatment resulted in colonic erosion and ulceration. Neutrophil infiltration (indicated by myeloperoxidase activity in the colon) was associated with formation of nitrotyrosine and marked apoptosis. Elevated levels of plasma nitrate/nitrite, metabolites of nitric oxide (NO), were also found. These inflammatory events were associated with the activation of nuclear factor-kappa B (NF-kappa B) and activator protein-1 (AP-1) in the colon; NF-kappa B was maximally activated at 3 and 7 days, whereas AP-1 increased 1 day after TNBS administration and declined thereafter. Treatment of the rats with the PARP inhibitors, 3-aminobenzamide or 1,5-dihydroxyisoquinoline, resolved colonic damage and reduced plasma levels of NO metabolites. Resolution of the damage was associated with reduction of neutrophil infiltration, nitrotyrosine formation and apoptosis. Treatment with PARP inhibitors also reduced DNA binding of NF-kappa B and AP-1 in the colon. These data demonstrate that pharmacological inhibition of PARP ameliorates colitis. Reduction of the inflammatory process is associated with modification of the activation of signal transduction pathways. |
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Authors:
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Basilia Zingarelli; Michael O'Connor; Paul W Hake |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: European journal of pharmacology Volume: 469 ISSN: 0014-2999 ISO Abbreviation: Eur. J. Pharmacol. Publication Date: 2003 May |
Date Detail:
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Created Date: 2003-06-03 Completed Date: 2004-02-18 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 1254354 Medline TA: Eur J Pharmacol Country: Netherlands |
Other Details:
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Languages: eng Pagination: 183-94 Citation Subset: IM |
Affiliation:
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Division of Critical Care Medicine, Cincinnati Children's Hospital Medical Center, 3333 Burnet Avenue, Cincinnati, OH 45229, USA. Basilia.Zingarelli@cchmc.org |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Colitis / chemically induced, drug therapy*, enzymology Enzyme Inhibitors / pharmacology*, therapeutic use* Male Poly(ADP-ribose) Polymerases / antagonists & inhibitors*, metabolism Rats Rats, Wistar Signal Transduction / drug effects*, physiology |
| Grant Support | |
ID/Acronym/Agency:
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R01 HL-60730/HL/NHLBI NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Enzyme Inhibitors; EC 2.4.2.30/Poly(ADP-ribose) Polymerases |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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