Beyond coagulation: Coagulation protease factor VIIa in cytoprotective response

Area of Science:

• Biochemistry
• Molecular Biology
• Physiology

Background:

• Blood coagulation prevents bleeding but is linked to inflammation.
• Vessel injury activates the extrinsic pathway via tissue factor (TF) and Factor VIIa (FVIIa).
• FVIIa also activates protease-activated receptor 1 (PAR1), influencing cellular signaling.

Purpose of the Study:

• To review the mechanisms by which FVIIa promotes cytoprotective responses.
• To explore FVIIa's dual role in coagulation and anti-inflammatory signaling.
• To highlight potential therapeutic applications beyond hemostasis.

Main Methods:

• Literature review of FVIIa's functions in coagulation and signaling.
• Analysis of FVIIa's direct actions and effects via extracellular vesicles (EVs).
• Examination of FVIIa's role in endothelial barrier protection and anti-inflammation.

Main Results:

• FVIIa initiates blood coagulation and activates PAR1 for cytoprotection.
• FVIIa mediates anti-inflammatory and endothelial barrier protective effects.
• FVIIa's actions can be direct or mediated by EVs released from endothelium.

Conclusions:

• FVIIa possesses significant anti-inflammatory and vascular protective properties.
• These properties offer potential therapeutic benefits beyond its hemostatic function.
• FVIIa's multifaceted roles warrant further investigation for novel treatment strategies.