NSE from diffuse large B-cell lymphoma cells regulates macrophage polarization

Area of Science:

• Oncology
• Immunology
• Cell Biology

Background:

• Diffuse large B-cell lymphoma (DLBCL) is a common, aggressive non-Hodgkin's lymphoma.
• Tumor-associated macrophages, particularly M2-type, contribute to lymphoma progression and treatment resistance.
• The precise role of neuron-specific enolase (NSE) in DLBCL's tumor-promoting mechanisms remains largely unknown.

Purpose of the Study:

• To investigate the function of NSE in modulating macrophage polarization within the DLBCL immune microenvironment.
• To elucidate the underlying molecular mechanisms by which NSE influences DLBCL progression.

Main Methods:

• Comparative analysis of NSE protein expression in DLBCL cell lines versus normal B lymphocytes.
• In vitro and in vivo functional assays to assess the impact of NSE on macrophage polarization and migration.
• Exosome-mediated transfer of NSE into macrophages and subsequent investigation of signaling pathways, including nuclear factor-kappa B (NF-κB).

Main Results:

• NSE protein expression was significantly higher in DLBCL cell lines compared to B lymphocytes.
• Elevated NSE in lymphoma cells promoted M2 macrophage polarization and enhanced macrophage migration.
• Lymphoma-derived exosomes facilitated NSE transfer into macrophages, leading to altered p50 nuclear translocation and impaired classical NF-κB activity.

Conclusions:

• NSE plays a crucial role in promoting DLBCL progression by influencing macrophage polarization and immune microenvironment.
• NSE demonstrates potential as a therapeutic target for DLBCL treatment.
• NSE may serve as a valuable prognostic biomarker for patients with DLBCL.