期刊
TOXICON
卷 40, 期 4, 页码 427-439出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0041-0101(01)00220-3
关键词
venom; opossum; Didelphis; hemorrhagin; antihemorrhagin; proteolytic activity; proteinase inhibitors; high performance liquid chromatography; electrophoretic titration; crotalinae; viperid; Crotalas
资金
- NCRR NIH HHS [5P20RR11594] Funding Source: Medline
- NIGMS NIH HHS [2S06GM08107-2X] Funding Source: Medline
Opossums are animals that are naturally resistant to the proteolytic effects of Crotalid venoms. Opossums possess proteinase inhibitors in their sera that hind to and neutralize hemorrhagic and other proteolytic activity in many snake venoms. The proteinase inhibitors are not antibodies since they have different molecular weights (60 kDa) and pl (4.21). The purpose of this study was to determine if opossums were capable of producing antibodies against venom and/or increasing the production of proteinase inhibitors (specifically antihemorrhagins). Five different venom immunization protocols were used to determine the effects of the venom in the opossums. The dosages ranged from 1 mg of venom per immunization to 350 mg/kg body weight of venom per immunization. The antihemorrhagic response was increased, but there is no evidence to suggest that an opossum can produce antibodies against venom. The lack of an antibody response is most likely due to the natural proteinase inhibitors clearing the venom from the opossum's body before an antibody response can occur. (C) 2002 Elsevier Science Ltd. All rights reserved.
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