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Snake venom hemorrhagins.

R Hati1, P Mitra, S Sarker

  • 1Indian Institute of Chemical Biology, Jadavpur, Calcutta.

Critical Reviews in Toxicology
|March 5, 1999
PubMed
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Hemorrhagins, metalloproteases in snake venom, degrade basement membranes, causing bleeding. Understanding these toxins is crucial for treating snakebite poisoning.

Area of Science:

  • Biochemistry
  • Toxicology
  • Molecular Biology

Background:

  • Viperine and crotaline snake venoms contain hemorrhagins, potent hemorrhagic toxins.
  • Hemorrhagins are zinc-containing metalloproteases, some with additional domains.
  • They are key factors in snake venom's lethal effects.

Purpose of the Study:

  • To review the structural and functional characteristics of snake venom hemorrhagins.
  • To enhance understanding of hemorrhagin toxicity.
  • To explore therapeutic implications for snakebite management.

Main Methods:

  • Literature review of studies on snake venom hemorrhagins.
  • Analysis of biochemical and structural data of metalloproteases.
  • Examination of functional assays related to hemorrhage, fibrinogenolysis, and platelet aggregation.

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Main Results:

  • Hemorrhagins degrade basement membrane proteins, damaging capillary endothelial cells.
  • Mechanisms include lysis or drifting apart of endothelial cells, causing hemorrhage.
  • Additional effects like fibrinogenolysis and platelet aggregation contribute to bleeding.

Conclusions:

  • Hemorrhagins are critical venom components causing significant toxicity.
  • Detailed knowledge of hemorrhagins aids in developing effective antivenoms.
  • Targeting hemorrhagins offers therapeutic potential for snakebite victims.