Anti-thrombotic agents derived from snake venom proteins

Area of Science:

• Biochemistry
• Pharmacology
• Cell Biology

Background:

• Snake venoms contain proteins like snaclecs and disintegrins that modulate blood coagulation and platelet function.
• Disintegrins are cysteine-rich polypeptides from viper venoms, characterized by Arg-Gly-Asp (RGD) or Lys-Gly-Asp (KGD) motifs.
• These proteins target specific cell receptors, including integrins on platelets and tumor cells, influencing cell interactions.

Approach:

• This review focuses on disintegrins derived from snake venoms.
• It explores their mechanisms of action, particularly their interaction with integrin receptors.
• The review discusses the therapeutic potential of disintegrins in treating integrin-related diseases.

Key Points:

• Disintegrins bind to integrins (e.g., αIIbβ3, αvβ3, α5β1) and CLEC-2, impacting platelet aggregation, angiogenesis, tumor metastasis, and inflammation.
• Their RGD/KGD motifs are crucial for receptor recognition and downstream signaling.
• Specific disintegrins show promise in managing arterial thrombosis, cancer progression, and septic inflammation.

Conclusions:

• Disintegrins represent a promising class of molecules for therapeutic development against integrin-mediated diseases.
• The novel disintegrin TMV-7 is under development as an antithrombotic agent with an improved safety profile.
• Further research into disintegrins could lead to innovative treatments with reduced side effects like thrombocytopenia and bleeding.