Abstract
The haemostatic components of venom from the genus Porthidium has been poorly studied, although it is known that severe manifestations occur when humans are envenomed, which include invasive oedema and disseminated ecchymosis. The effects of venom on blood platelets are commonly studied and are normally carried out with platelet-rich plasma (PRP). A series of crude venom dilutions was used to determine the effects of adenosine diphosphate (2 μM) and adrenaline (11 μM) induced platelet aggregation. Venom of Porthidium lansbergii hutmanni was fractioned by anionic exchange chromatography, and the fractions were also used to determine the 50% inhibition of adenosine diphosphate (ADP) and adrenaline-induced platelet aggregating dose (AD50). Crude venom has more effect in inhibiting adrenaline-induced aggregation (AD50 = 0.0043 μg) followed by the adenosine diphosphate (AD50 = 17 μg). Peaks I and II obtained by chromatography also inhibited adrenaline-induced platelet aggregation with an AD50 of 3.2 and 0.013 μg, respectively, and both peaks inhibited ADP-induced platelet aggregation with an AD50 of 10 μg. The main purpose of this work was to characterise the in vitro effects caused by P. lansbergii hutmanni crude venom and its fractions on the platelet aggregation mediated by adrenaline and ADP agonists.
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The authors recognise the financial support obtained from the Science and Technology Fund (FONACIT) program (PG-2002000447 and PG-2005000400), Caracas, Venezuela.
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Lopez-Johnston, J.C., de Bosch, N., Scannone, H. et al. Inhibition of adrenaline and adenosine diphosphate induced platelet aggregation by Lansberg’s hognose pit viper (Porthidium lansbergii hutmanni) venom. Ann Hematol 86, 879–885 (2007). https://doi.org/10.1007/s00277-007-0354-y
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DOI: https://doi.org/10.1007/s00277-007-0354-y