| Inflammatory effects of patagonfibrase, a metalloproteinase from Philodryas patagoniensis (Patagonia Green Racer; Dipsadidae) venom. | |
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MedLine Citation:
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PMID: 21885478 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Patagonfibrase is a P-III class metalloproteinase isolated from the venom of Philodryas patagoniensis, a South-American, rear-fanged 'colubrid' snake responsible for accidents with clinical significance. Since local inflammatory reactions are conspicuous signs of snakebites inflicted by this species and taking into consideration that most snake venom metalloproteinases exhibit inflammatory activity, this study deals with the proinflammatory effects evoked by patagonfibrase. Herein, we demonstrate that patagonfibrase causes a time- and dose-dependent hemorrhagic edema when injected into mouse hind paws. The peak of edema occurred at 30 min after injection, and the minimum edematogenic dose was 0.021 μg. By histological analysis, the presence of moderate to marked edema and hemorrhage, and a mild inflammatory infiltrate was observed. When injected subcutaneously into the scrotal bag of mice, patagonfibrase induced cell recruitment with a significant alteration in physiological parameters of leukocyte-endothelium interaction. The presence of 1 mmol/L o-phenanthroline, which chelates metal ions, significantly inhibited the proinflammatory effects induced by patagonfibrase. Taken together, these results imply that patagonfibrase is an important contributor to local inflammation elicited by P. patagoniensis envenomation, which may pave the way for novel therapeutic strategies to treat this snakebite. Moreover, our findings demonstrate for the first time that a venom metalloproteinase from a rear-fanged snake elicits proinflammatory effects mainly mediated by its catalytic activity. |
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Authors:
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María Elisa Peichoto; Bianca Cestari Zychar; Flávio Luiz Tavares; Luis Roberto de Camargo Gonçalves; Ofelia Acosta; Marcelo Larami Santoro |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-9-1 |
Journal Detail:
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Title: Experimental biology and medicine (Maywood, N.J.) Volume: - ISSN: 1535-3699 ISO Abbreviation: - Publication Date: 2011 Sep |
Date Detail:
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Created Date: 2011-9-2 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100973463 Medline TA: Exp Biol Med (Maywood) Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Cátedra de Farmacología, Facultad de Ciencias Veterinarias, Universidad Nacional del Nordeste, Sargento Cabral 2139, 3400 Corrientes, Argentina. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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