Membrane microvesicles: macromessengers in cancer disease and progression

Area of Science:

• Oncology
• Hematology
• Cell Biology

Background:

• Thrombotic complications are frequently observed in cancer patients, correlating with disease progression.
• Elevated levels of circulating microvesicles (MVs), which are small membrane fragments from cells, are characteristic of cancer.
• MVs play a significant role in hemostasis and thrombosis, serving as pathogenic markers for vascular damage.

Purpose of the Study:

• To review the role of microvesicles (MVs) in cancer-associated thrombosis.
• To explore the mechanisms by which MVs contribute to thrombotic events in cancer.

Main Methods:

• Literature review focusing on studies investigating microvesicles in cancer and thrombosis.
• Analysis of the procoagulant properties and cell-to-cell communication roles of MVs.

Main Results:

• MVs, derived from activated or apoptotic cells, possess procoagulant phospholipids and tissue factor, enabling clot initiation and propagation.
• Variations in MV levels and phenotypes are associated with thrombotic disorders and vascular damage in cancer.
• MVs mediate cell-to-cell communication, though the precise interaction mechanisms (e.g., fusion, ligand-receptor) require further elucidation.

Conclusions:

• Microvesicles are critical effectors in cancer-associated thrombosis, initiating and propagating thrombotic reactions.
• MV levels and phenotypes serve as important pathogenic markers for thrombotic disorders in cancer patients.
• Further research is needed to fully understand MV-target cell interactions and their non-deleterious functions.