Please use this identifier to cite or link to this item: https://doi.org/10.1016/0041-0101(95)00046-O
Title: Effects of stonustoxin (lethal factor from Synanceja horrida venom) on platelet aggregation
Authors: Khoo, H.E. 
Hon, W.M.
Yuen, R.
Lee, S.H.
Issue Date: 1995
Source: Khoo, H.E., Hon, W.M., Yuen, R., Lee, S.H. (1995). Effects of stonustoxin (lethal factor from Synanceja horrida venom) on platelet aggregation. Toxicon 33 (8) : 1033-1041. ScholarBank@NUS Repository. https://doi.org/10.1016/0041-0101(95)00046-O
Abstract: Stonustoxin (SNTX) is a 148,000 mol. wt lethal factor isolated from Synanceja horrida venom. It induces species-restricted red cell haemolysis which correlates with its effects on platelet aggregation in whole blood. SNTX induced a concentration-dependent and irreversible platelet aggregation in rabbit or rat in not in human or mouse whole blood. The degree of haemolysis and platelet aggregation induced by SNTX in rabbit or rat whole blood were concentration dependent. At concentrations of SNTX where only slight or no haemolysis was observed, no platelet aggregation occurred. Although SNTX itself could not induce platelet aggregation in rabbit or rat platelet-rich plasma (PRP), it had biphasic effects on collagen- or ADP-induced platelet aggregation in PRP. It inhibited collagen or ADP-induced platelet aggregation at high concentrations (0.08-0.8 μg/ml) but the response was potentiated by lower stonustoxin concentrations (0.008-0.016 μg/ml). The inhibition of collagen- or ADP-induced platelet aggregation might be due to the lytic activity of SNTX on the platelets.
Source Title: Toxicon
URI: http://scholarbank.nus.edu.sg/handle/10635/38295
ISSN: 00410101
DOI: 10.1016/0041-0101(95)00046-O
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