Factor XIII deficiency in BALB/c mice with plasmacytoma

Area of Science:

• Biochemistry
• Oncology
• Hematology

Background:

• Factor XIII (fibrin-stabilizing factor) is crucial for blood clot stability.
• Plasmacytoma is a cancer of plasma cells, often associated with monoclonal gammopathies.

Purpose of the Study:

• To investigate the behavior and levels of Factor XIII in mice bearing plasmacytoma tumors.
• To determine if tumor burden affects plasma Factor XIII concentrations.

Main Methods:

• Mice with various plasmacytoma cell lines (MOPC-300, MOPC-384, MOPC-467, J-558) were utilized.
• Plasma Factor XIII levels were measured and correlated with tumor size.
• Immunofluorescence was employed to localize Factor XIII within tumor cells.

Main Results:

• Plasma Factor XIII levels declined progressively as plasmacytoma tumors expanded.
• No inhibitory substances against Factor XIII activity were found in the plasma.
• Factor XIII was detected on the membranes and within the cytoplasm of plasmacytoma cells.

Conclusions:

• The decrease in plasma Factor XIII is linked to tumor progression in plasmacytoma.
• Plasmacytoma cells appear to absorb or sequester Factor XIII from circulation.
• This suggests a potential mechanism for altered coagulation in cancer patients.