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| Fusco,Luciano S.; Cajade,Rodrigo; Piñeiro,Jose M.; Torres,Ana M.; Silva,Igor R. F. da; Hyslop,Stephen; Leiva,Laura C.; Pimenta,Daniel C.; Bustillo,Soledad. |
| Abstract Background: Argenteohyla siemersi (red-spotted Argentina frog) is a casque-headed tree frog species belonging to the Hylidae family. This species has a complex combination of anti-predator defense mechanisms that include a highly lethal skin secretion. However, biochemical composition and biological effects of this secretion have not yet been studied. Methods: The A. siemersi skin secretion samples were analyzed by mass spectrometry and chromatographic analysis (MALDI-TOF/MS, RP-HPLC and GC-MS). Proteins were also studied by SDS-PAGE. Among the biological activities evaluated, several enzymatic activities (hemolytic, phospholipase A2, clotting, proteolytic and amidolytic) were assessed. Furthermore, the cytotoxic activity (cytolysis and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Argenteohyla siemersi; Hylidae; Skin secretion; Tree frog; Cytotoxicity. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992020000100306 |
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| Sutti,Rafael; Tamascia,Mariana Leite; Hyslop,Stephen; Rocha-e-Silva,Thomaz Augusto Alves. |
| BackgroundVenom hyaluronidase (Hyase) contributes to the diffusion of venom from the inoculation site. In this work, we purified and characterized Hyase from the venom of Vitalius dubius (Araneae, Theraphosidae), a large theraphosid found in southeastern Brazil. Venom obtained by electrical stimulation of adult male and female V. dubius was initially fractionated by gel filtration on a Superdex® 75 column. Active fractions were pooled and applied to a heparin-sepharose affinity column. The proteins were eluted with a linear NaCl gradient.ResultsActive fractions were pooled and assessed for purity by SDS-PAGE and RP-HPLC. The physicochemical tests included optimum pH, heat stability, presence of isoforms, neutralization by flavonoids and assessment of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hyaluronidase; Venom; Purification; Vitalius dubius. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992014000200312 |
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