当前位置： SCI文献检索 > JOURNAL OF THROMBOSIS AND THROMBOLYSIS期刊下所有文献 > Inhibition of collagen, and thrombin-induced platelet aggregation by Lansberg's hognose pit viper (Porthidium lansbergii hutmanni) venom.

Inhibition of collagen, and thrombin-induced platelet aggregation by Lansberg's hognose pit viper (Porthidium lansbergii hutmanni) venom.

Abstract：

:The Porthidium genus is represented by the P. lansbergii rozei and P. lansbergii hutmanni (Plh) subspecies in Venezuela. The venom components of these have been little studied, probably due to the low incidence of reported accidents, although acute and serious local effects such as invasive edema and disseminated ecchymosis are present during human envenonation. The aim of this work was to characterize the in vitro effects of crude P. l. hutmanni venom, and its fractions, on platelet aggregation triggered by two physiologic agonists: thrombin and collagen. The effects of thrombin and collagen were observed on a platelet-rich plasma (PRP) solution (3 x 10(5) platelets/microL) using serial dilutions of P. l. hutmanni venom (0.625-40 microg). The crude venom was fractionated by anionic exchange chromatography and two peaks obtained. Crude venom and both fractions were highly inhibitory on platelet aggregation mediated by the two agonists. The anti-aggregating dose (AD(50)) for both agonists was determined. PRP collagen-triggered aggregation was most inhibited by the crude venom (AD(50) = 0.67 microg) when compared with PRP thrombin-triggered aggregation (AD(50) = 4.92 microg). Collagen-induced aggregation was more intensely inhibited by venom than thrombin-induced aggregation. In conclusion, to specify the inhibition mechanisms involved for each of the active components in the venom from these subspecies, we must characterize and purify the inhibitors of aggregation from P. l. hutmanni venom, with the purpose of suggesting new pharmacological substances to be incorporated into the therapeutic arsenal to treat hemostatic pathologies related to high levels of platelet aggregation.

journal_name

J Thromb Thrombolysis

journal_title

Journal of thrombosis and thrombolysis

authors

López-Johnston JC,de Bosch N,Scannone H,Rodríguez-Acosta A

doi

10.1007/s11239-007-0040-x

subject

Has Abstract

pub_date

2007-12-01 00:00:00

pages

275-82

issue

3

eissn

0929-5305

issn

1573-742X

journal_volume

24

pub_type

杂志文章

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