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- W2034708299 abstract "SUMMARY Black whip snakes belong to the family elapidae and are found throughout the northern coastal region of Australia. The black whip snake ( Demansia papuensis ) is considered to be potentially dangerous due to its size and phylogenetic distinctiveness. Previous liquid chromatography–mass spectrometry analysis of D. papuensis venom indicated a number of components within the molecular mass ranges compatible with neurotoxins. For the first time, this study examines the in vitro neurotoxic and myotoxic effects of the venom from D. papuensis. Venom (10 mg/mL) caused significant inhibition of twitches elicited by stimulation (0.2 ms, 0.1 Hz, supramaximal V) of motor nerves in the chick biventer cervicis nerve‐muscle preparation. This neurotoxic effect, which was postsynaptic in origin, was weak in comparison to that of most other Australian elapids. Prior addition (10 min) of polyvalent (PSAV) or tiger snake (TSAV) antivenom (5 units/mL) prevented venom‐induced twitch inhibition. Addition of PSAV (5 units/mL) at t 50 failed to reverse the inhibitory effect but prevented further inhibition of nerve‐mediated twitches. The venom (20–50 mg/mL) is also myotoxic as indicated by a slowly developing contracture and inhibition of twitches elicited by direct stimulation (2 ms, 0.1 Hz, supramaximal V, in the presence of tubocurarine 10 mmol/L) of the chick biventer muscle. This activity was confirmed by histological examination of the muscle. Fractionation and characterization of venom components is required to further investigate the reasons for the weak neurotoxic activity of D. papuensis venom." @default.
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- W2034708299 date "2006-03-16" @default.
- W2034708299 modified "2023-10-10" @default.
- W2034708299 title "IN VITRO NEUROTOXIC AND MYOTOXIC EFFECTS OF THE VENOM FROM THE BLACK WHIP SNAKE (DEMANSIA PAPUENSIS)" @default.
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- W2034708299 doi "https://doi.org/10.1111/j.1440-1681.2006.04376.x" @default.
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