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A platelet aggregation inhibitor phospholipase A2 from Russell's viper (Vipera russelli) venom: isolation and characterization. 1996

B N Prasad, and K Kemparaju, and K G Bhatt, and T V Gowda
Department of Studies in Biochemistry, University of Mysore, Manasagangotri, India.

Vipera russelli venom is reported to contain multiple forms of phospholipase A2 (PLA2). Three PLA2s (VRV-PL-V, VRV-PL-VI and VRV-PL-VIIIa) have been purified and characterized in this laboratory. A PLA2(VRV-PL-IIIb) inhibiting platelet aggregation was purified from the same venom in two steps involving CM-Sephadex C-25 column chromatography followed by gel filtration on Sephadex G-50. VRV-PL-IIIb is a basic (pI 7.3-7.7) isoenzyme, with a mol. wt between 14,000 and 15,000. It induced neurotoxic symptoms in experimental mice with an i.p. LD50 of 5.2 mg/kg body weight. VRV-PL-IIIb inhibits ADP-induced platelet aggregation in a dose-dependent manner. It induced oedema in the foot pads of mice and is devoid of anticoagulant, myotoxic and direct haemolytic activities. Antibodies to VRV-PL-IIIb showed a single precipitin line against the antigen as well as whole venom.

UI MeSH Term Description Entries
D007194 India A country in southern Asia, bordering the Arabian Sea and the Bay of Bengal, between Burma and Pakistan. The capitol is New Delhi. Republic of India
D007928 Lethal Dose 50 The dose amount of poisonous or toxic substance or dose of ionizing radiation required to kill 50% of the tested population. LD50,Dose 50, Lethal
D010741 Phospholipases A Phospholipases that hydrolyze one of the acyl groups of phosphoglycerides or glycerophosphatidates.
D010975 Platelet Aggregation Inhibitors Drugs or agents which antagonize or impair any mechanism leading to blood platelet aggregation, whether during the phases of activation and shape change or following the dense-granule release reaction and stimulation of the prostaglandin-thromboxane system. Antiaggregants, Platelet,Antiplatelet Agent,Antiplatelet Agents,Antiplatelet Drug,Blood Platelet Aggregation Inhibitor,Blood Platelet Antagonist,Blood Platelet Antiaggregant,PAR-1 Antagonists,Platelet Aggregation Inhibitor,Platelet Antagonist,Platelet Antagonists,Platelet Antiaggregant,Platelet Antiaggregants,Platelet Inhibitor,Protease-Activated Receptor-1 Antagonists,Antiplatelet Drugs,Blood Platelet Aggregation Inhibitors,Blood Platelet Antagonists,Blood Platelet Antiaggregants,Platelet Inhibitors,Agent, Antiplatelet,Aggregation Inhibitor, Platelet,Antagonist, Blood Platelet,Antagonist, Platelet,Antiaggregant, Blood Platelet,Antiaggregant, Platelet,Drug, Antiplatelet,Inhibitor, Platelet,Inhibitor, Platelet Aggregation,PAR 1 Antagonists,Platelet Antagonist, Blood,Platelet Antiaggregant, Blood,Protease Activated Receptor 1 Antagonists
D001792 Blood Platelets Non-nucleated disk-shaped cells formed in the megakaryocyte and found in the blood of all mammals. They are mainly involved in blood coagulation. Platelets,Thrombocytes,Blood Platelet,Platelet,Platelet, Blood,Platelets, Blood,Thrombocyte
D004487 Edema Abnormal fluid accumulation in TISSUES or body cavities. Most cases of edema are present under the SKIN in SUBCUTANEOUS TISSUE. Dropsy,Hydrops,Anasarca
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000906 Antibodies Immunoglobulin molecules having a specific amino acid sequence by virtue of which they interact only with the ANTIGEN (or a very similar shape) that induced their synthesis in cells of the lymphoid series (especially PLASMA CELLS).
D014757 Viper Venoms Venoms from SNAKES of the viperid family. They tend to be less toxic than elapid or hydrophid venoms and act mainly on the vascular system, interfering with coagulation and capillary membrane integrity and are highly cytotoxic. They contain large amounts of several enzymes, other factors, and some toxins. Russell Viper Venom,Russell Viper Venoms,Russell's Viper Venom,Russell's Viper Venoms,Viperidae Venoms,Cerastes Venom,Cerastes Venoms,Egyptian Sand Viper Venom,Viper Venom,Viperotoxin,Russells Viper Venom,Russells Viper Venoms,Venom, Cerastes,Venom, Russell Viper,Venom, Russell's Viper,Venom, Viper,Venoms, Cerastes,Venoms, Russell Viper,Venoms, Russell's Viper,Venoms, Viper,Venoms, Viperidae,Viper Venom, Russell,Viper Venom, Russell's,Viper Venoms, Russell,Viper Venoms, Russell's

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