| PACAP and a novel stable analog protect rat brain from ischemia: Insight into the mechanisms of action. | |
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MedLine Citation:
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PMID: 21514338 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Pituitary adenylate cyclase-activating polypeptide (PACAP) shows potent protective effects in numerous models of neurological insults. However, the use of PACAP as a clinically efficient drug is limited by its poor metabolic stability. By combining identification of enzymatic cleavage sites with targeted chemical modifications, a metabolically stable and potent PACAP38 analog was recently developed. The neuroprotective activity of this novel compound was for the first time evaluated and compared to the native peptide using a rat model of middle cerebral artery occlusion (MCAO). Our results show that as low as picomolar doses of PACAP38 and its analog strongly reduce infarct volume and improve neurological impairment induced by stroke. In particular, these peptides inhibit the expression of Bcl-2-associated death promoter, caspase 3, macrophage inflammatory protein-1α, inducible nitric oxide synthase 2, tumor necrosis factor-α mRNAs, and increase extracellular signal-regulated kinase 2, B-cell CLL/lymphoma 2 and interleukin 6 mRNA levels. These results indicate that the neuroprotective effect of PACAP after MCAO is not only due to its ability to inhibit apoptosis but also to modulate the inflammatory response. The present study highlights the potential therapeutic efficacy of very low concentrations of PACAP or its metabolically stable derivative for the treatment of stroke. |
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Authors:
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Agnieszka Dejda; Tommy Seaborn; Steve Bourgault; Omar Touzani; Alain Fournier; Hubert Vaudry; David Vaudry |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-4-14 |
Journal Detail:
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Title: Peptides Volume: - ISSN: 1873-5169 ISO Abbreviation: - Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-4-25 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8008690 Medline TA: Peptides Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011. Published by Elsevier Inc. |
Affiliation:
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INSERM U982, 76821 Mont-Saint-Aignan, France; European Institute for Peptide Research, Rouen University, Mont-Saint-Aignan, France; International Associated Laboratory Samuel de Champlain, INSERM-INRS, France. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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