Immunomodulatory Effect of β-Glucan on Peritoneal Macrophages of Bab1/c Mice

Area of Science:

• Immunology
• Pharmacology

Background:

• Macrophages are key immune cells involved in tumor surveillance.
• Tumor necrosis factor-alpha (TNF-α) plays a critical role in immune responses against cancer.

Purpose of the Study:

• To investigate the immunomodulatory effects of beta-glucan on macrophages.
• To assess beta-glucan's impact on macrophage nitric oxide (NO) production and cytotoxic activity against tumor cells.

Main Methods:

• Macrophages were treated with varying concentrations of beta-glucan.
• Nitric oxide (NO) release was measured using the Griess reagent.
• Macrophage viability was assessed via MTT assay.
• Cytotoxicity of macrophage supernatants against WEHI-164 fibrosarcoma cells was evaluated using a TNF-α bioassay.

Main Results:

• Beta-glucan significantly increased NO release from macrophages at a dose of 10 µg/ml (P = 0.001).
• Macrophage viability remained unaffected across all tested concentrations of beta-glucan.
• Supernatants from beta-glucan-stimulated macrophages exhibited significant cytotoxic effects on WEHI-164 cells (P = 0.023).

Conclusions:

• Beta-glucan enhances the tumoricidal activity of macrophages.
• The findings suggest beta-glucan's potential role in augmenting anti-cancer immune responses.