Brown spider venom toxins interact with cell surface and are endocytosed by rabbit endothelial cells

Brown spider venom toxins interact with cell surface and are endocytosed by rabbit endothelial cells

Author Nowatzki, Jenifer Google Scholar
Sene, Reginaldo Vieira de Google Scholar
Paludo, Katia Sabrina Autor UNIFESP Google Scholar
Veiga, Silvio Sanches Google Scholar
Oliver, Constance Google Scholar
Jamur, Maria Celia Google Scholar
Nader, Helena Bonciani Autor UNIFESP Google Scholar
Trindade, Edvaldo S. Google Scholar
Franco, Celia Regina C. Google Scholar
Institution Univ Fed Parana
Universidade Federal de São Paulo (UNIFESP)
Universidade de São Paulo (USP)
Abstract Bites from the Loxosceles genus (brown spiders) cause severe clinical symptoms, Including dermonecrotic injury, hemorrhage, hemolysis, platelet aggregation and renal failure. Histological findings of dermonecrotic lesions in animals exposed to Loxosceles intermedia venom show numerous vascular alterations Study of the hemorrhagic consequences of the venom in endothelial cells has demonstrated that the degeneration of blood vessels results not only from degradation of the extracellular matrix molecule or massive leukocyte infiltration, but also from a direct and primary activity of the venom on endothelial cells. Exposure of an endothelial cell line in vitro to L. intermedia venom induce morphological alterations, such as cell retraction and disadhesion to the extracellular matrix. the aim of the present study was to investigate the interaction between the venom toxins and the endothelial cell surface and their possible internalization, in order to illuminate the information about the deleterious effect triggered by venom After treating endothelial cells with venom toxins, we observed that the venom Interacts with cell surface. Venom treatment also can cause a reduction of cell surface glycoconjugates When cells were permeabilized, it was possible to verify that some venom toxins were internalized by the endothelial cells the venom internalization involves endocytic vesicles and the venom was detected in the lysosomes. However, no damage to lysosomal integrity was observed, suggesting that the cytotoxic effect evoked by L interned:a venom on endothelial cells is not mediated by venom internalization (C) 2010 Elsevier B.V. All rights reserved
Keywords Loxosceles intermedia
Endothelial cells
Venom internalization
Endocytosis
Language English
Sponsor Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundacao Araucaria-PR
Secretaria de Estado de Ciencia, Tecnologia e Ensino Superior do Parana (SETI), Brazil
Date 2010-09-15
Published in Toxicon. Oxford: Pergamon-Elsevier B.V., v. 56, n. 4, p. 535-543, 2010.
ISSN 0041-0101 (Sherpa/Romeo, impact factor)
Publisher Elsevier B.V.
Extent 535-543
Origin http://dx.doi.org/10.1016/j.toxicon.2010.03.027
Access rights Closed access
Type Article
Web of Science ID WOS:000281001800007
URI http://repositorio.unifesp.br/handle/11600/32913

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