Thrombin inhibition by malignant and normal cells: a cell-bound antithrombin effect

Area of Science:

• Oncology
• Hematology
• Cell Biology

Background:

• Growing evidence suggests a link between blood clotting and cancer growth/spread.
• Cellular antithrombin activity may play a role in this interrelationship.

Purpose of the Study:

• To investigate the presence and characteristics of cellular antithrombin activity in normal and malignant tissues.
• To explore the potential implications of cellular antithrombins in cancer.

Main Methods:

• Analysis of fresh surgical specimens of normal and tumor tissues.
• Assessment of cellular antithrombin activity and thrombin binding.

Main Results:

• Cellular antithrombin activity was detected in normal colon, testes, breast, and uterus.
• This activity was prominent in colon, breast, and lung adenocarcinomas.
• No thrombin binding was observed in epidermoid tumors.
• Activity required intact cells and was distinct from soluble antithrombins.

Conclusions:

• Cellular antithrombin activity is present in specific normal and malignant tissues.
• The findings support the interrelationship between clotting and cancer.
• Further review of cellular antithrombin implications in cancer is warranted.