PMID: 8599181Oct 1, 1995Paper

Some pharmacological studies on the effects of Cerastes vipera (Sahara sand viper) snake venom

Toxicon : Official Journal of the International Society on Toxinology
M AlzahabyA L Harvey

Abstract

The effects of the venom of the Sahara sand viper (Cerastes vipera) were studied on isolated chick biventer cervicis, isolated rat atria and vas deferens preparations, and on the electrocardiogram of anaesthetized rats. Effects on 3H-noradrenaline uptake were studied using rat brain synaptosomes. At 50 micrograms/ml and 100 micrograms/ml, the venom caused a transient increase in rate and force of contractions of the rat atria followed by an irreversible depression. These effects were not prevented by atenolol, atropine or a combination of the two. In the presence of 25 microM lignocaine, the effects of venom on rat atria were reversible by washing. At 100 micrograms/ml, the venom transiently increased responses of vas deferens preparations to indirect stimulation, but had little effect on responses to noradrenaline, KCl, and ATP. In the presence of an alpha 1-adrenoceptor antagonist (prazosin) or a P2-purinergic receptor antagonist (suramin), the venom still significantly increased twitch height and responses to noradrenaline but not to KCl or ATP. The effect of the venom did not change after exposure to a combination of prazosin, suramin and tetrodotoxin. The venom (100 micrograms/ml) significantly decreased twitches to indire...Continue Reading

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Citations

Jun 27, 1998·Toxicon : Official Journal of the International Society on Toxinology·M AlzahabyE G Rowan
May 15, 2002·Trends in Pharmacological Sciences·Alan L Harvey
Jun 5, 2002·Brazilian Journal of Medical and Biological Research = Revista Brasileira De Pesquisas Médicas E Biológicas·E Z ArrudaP A Melo

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