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L A F Silva, D H Morais, A Aguiar, W O Almeida, R J Silva
No abstract text is available yet for this article.
May 2015: Brazilian Journal of Biology, Revista Brasleira de Biologia
Amalid Estrella, Elda E Sánchez, Jacob A Galán, W Andy Tao, Belsy Guerrero, Luis F Navarrete, Alexis Rodríguez-Acosta
Helicops angulatus (broad-banded water snake) according to recent proposals is presently cited in the family Dipsadidae, subfamily Xenodontinae, forming the tribe Hydropsini along with the genera Hydrops and Pseudoeryx. The current work characterizes the proteolytic and neurotoxic activities of H. angulatus crude toxins from salivary excretion (SE) and describes the isolation and identification of a cysteine-rich secretory protein (CRISP) called helicopsin. The SE lethal dose (LD₅₀) was 5.3 mg/kg; however, the SE did not contain hemorrhagic activity...
April 2011: Archives of Toxicology
O Rocha-Barbosa, R B Moraes e Silva
The morphology of many organisms seems to be related to the environment they live in. Nonetheless, many snakes are so similar in their morphological patterns that it becomes quite difficult to distinguish any adaptive divergence that may exist. Many authors suggest that the microornamentations on the scales of reptiles have important functional value. Here, we examined variations on the micromorphology of the exposed oberhautchen surface of dorsal, lateral, and ventral scales from the mid-body region of Xenodontinae snakes: Sibynomorphus mikani (terricolous), Imantodes cenchoa (arboreal), Helicops modestus (aquatic) and Atractus pantostictus (fossorial)...
August 2009: Brazilian Journal of Biology, Revista Brasleira de Biologia
Marisa M Teixeira Rocha, Danielle Paixão-Cavalcante, Denise V Tambourgi, Maria de Fátima D Furtado
Colubrids involved in human envenomation in Brazil are mainly from the genera Helicops, Oxyrhopus, Thamnodynastes and Philodryas. There is a relatively large number of clinical descriptions involving the Xenodontinae snakes, Philodryas olfersii and Philodryas patagoniensis, in human accidents. The most common manifestations of envenomation are local pain, swelling, erythema and ecchymosis and regional lymphadenopathy with normal coagulation. The aims of this study were to characterize the biochemical and biological properties of P...
January 2006: Toxicon: Official Journal of the International Society on Toxinology
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