| cellular prion protein modulates defensive attention and innate fear-induced behaviour evoked in transgenic mice submitted to an agonistic encounter with the tropical coral snake oxyrhopus guibei. | the cellular prion protein (prp(c)) is a neuronal anchored glycoprotein that has been associated with distinct functions in the cns, such as cellular adhesion and differentiation, synaptic plasticity and cognition. here we investigated the putative involvement of the prp(c) in the innate fear-induced behavioural reactions in wild-type (wt), prp(c) knockout (prnp(0/0)) and the prp(c) overexpressing tg-20 mice evoked in a prey versus predator paradigm. the behavioural performance of these mouse st ... | 2008 | 18590772 |
| morphological and molecular characterization of strongyloides ophidiae (nematoda, strongyloididae). | the aim of the present study is to report morphological data from parasitic female, rhabditoid and filarioid larvae, free-living female worms and eggs of strongyloides ophidiae (nematoda, strongyloididae). in addition, a molecular dna analysis was carried out using a pool of eight s. ophidiae parasitic females. samples were obtained from the small intestine of oxyrhopus guibei (serpentes, colubridae) collected in the municipality of lençóis paulista, state of são paulo, brazil. dna amplification ... | 2010 | 19712537 |
| differences in endothelin receptor types in the vasculature of bothrops jararaca (viperidae) and oxyrhopus guibei (colubridae) snakes. | endothelins (ets) are vasoactive peptides evolutionary well conserved that exert their effects through two specific receptors (et(a) and et(b)) widely distributed in all vertebrates. in snakes, the presence and function of endothelins and their receptors are still scarcely described. we have recently demonstrated the presence of et(a) and et(b2) receptors in the snake bothrops jararaca (bj). in the present work we showed that distinctively from bj, the vascular contraction induced by endothelin ... | 2008 | 18436483 |
| first report of parasitism by hexametra boddaertii (nematoda: ascaridae) in oxyrhopus guibei (serpentes: colubridae). | the current study summarizes the postmortem examination of a specimen of oxyrhopus guibei (serpentes, colubridae) collected in iguazu national park (argentina), and found deceased a week following arrival to the serpentarium of the national institute of tropical medicine (argentina). although the snake appeared to be in good health, a necropsy performed following its death identified the presence of a large number of roundworms in the coelomic cavity, with indications of peritonitis and serosal ... | 2016 | 27270391 |