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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Patagonfibrase modifies protein expression of tissue factor and protein disulfide isomerase in rat skin

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Autor(es):
Elisa Peichoto, Maria ; Santoro, Marcelo Larami
Número total de Autores: 2
Tipo de documento: Artigo Científico
Fonte: Toxicon; v. 119, p. 330-335, SEP 1 2016.
Citações Web of Science: 4
Resumo

Patagonfibrase is a hemorrhagic metalloproteinase isolated from the venom of the South American rear fanged snake Philodryas patagoniensis, and is an important contributor to local lesions inflicted by this species. The tissue factor (TF)-factor Vila complex, besides triggering the coagulation cascade, has been demonstrated to be involved in inflammatory events. Our aim was to determine whether patagonfibrase affects the expression of TF and protein disulfide isomerase (PDI), an enzyme that controls TF biological activity, at the site of patagonfibrase injection, and thus if they may play a role in hemostatic and inflammatory events induced by snake venoms. Patagonfibrase (60 mu g/kg) was administered s.c. to rats, and after 3 h blood was collected to evaluate hemostasis parameters, and skin fragments close to the site of injection were taken to assess TF and PDI expression. Patagonfibrase did not alter blood cell counts, plasma fibrinogen levels, or levels of TF activity in plasma. However, by semiquantitative Western blotting, patagonfibrase increased TF expression by 2-fold, and decreased PDI expression by 3-fold in skin samples. In agreement, by immunohistochemical analyses, prominent TF expression was observed in the subcutaneous tissue. Thus, patagonfibrase affects the local expression of TF and PDI without inducing any systemic hemostatic disturbance, although that they may be involved in the local inflammatory events induced by hemorrhagic metalloproteinases. Once antivenom therapy is not totally effective to treat the local injury induced by snake venoms, modulation of the activity and expression of TF and/or PDI might become a strategy for treating snake envenomation. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

Processo FAPESP: 10/08162-1 - Contribuição das lesões locais induzidas pelo veneno da serpente Bothrops jararaca para a gênese de distúrbios hemostáticos sistêmicos
Beneficiário:Marcelo Larami Santoro
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 10/52559-3 - Importância da lesão local induzida por metaloproteinases de venenos ofídicos na indução de plaquetopenia em envenenamentos
Beneficiário:Marcelo Larami Santoro
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 13/25177-0 - Envolvimento do fator de Von Willebrand nos distúrbios hemostáticos do envenenamento pela serpente Bothrops jararaca: estudo experimental
Beneficiário:Marcelo Larami Santoro
Linha de fomento: Auxílio à Pesquisa - Regular