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Proteolysis in vitro of low and high density lipoproteins in human plasma by Cerastes cerastes (Egyptian sand viper) venom
Journal article   Peer reviewed

Proteolysis in vitro of low and high density lipoproteins in human plasma by Cerastes cerastes (Egyptian sand viper) venom

M F el-Asmar and J B Swaney
Toxicon (Oxford), v 26(9), pp 809-816
1988
PMID: 3144061

Abstract

Edetic Acid - pharmacology Humans Lipoproteins, HDL - metabolism Lipoproteins, LDL - metabolism Peptide Hydrolases - pharmacology Viper Venoms - pharmacology
Envenomation by snake venoms would be expected to result in proteolysis of plasma proteins as well as of cellular constituents. Incubation of human serum with crude venom from Cerastes cerastes showed that the plasma lipoproteins were a target of this venom. Fractionation of the crude venom by gel filtration revealed that high density lipoprotein (HDL) was susceptible almost exclusively to the highest mol. wt fraction of venom and that proteolysis was due to a metalloprotease. Although HDL was degraded only by this metalloprotease, the low density lipoprotein (LDL) was proteolyzed by both metalloproteases and serine proteases present in several fractions of the venom. Despite extensive degradation, LDL remained intact, as judged by gradient gel electrophoresis. The selectivity of venom fractions may prove useful in the study of lipoprotein structure.

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Web of Science research areas
Pharmacology & Pharmacy
Toxicology
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