Tumor-neutrophil crosstalk promotes

Area of Science:

• Immunology
• Oncology
• Cell Biology

Background:

• The tumor microenvironment (TME) in glioblastoma (GB) features immunosuppressive cells that hinder anti-tumor immunity.
• The role of neutrophils in tumor progression is debated, with evidence suggesting a dual function within the TME.

Purpose of the Study:

• To investigate the role of neutrophils in glioblastoma progression.
• To elucidate the mechanisms of glioblastoma-neutrophil communication and its impact on the TME.

Main Methods:

• In vitro and in vivo assays were employed to study glioblastoma-neutrophil interactions.
• Advanced 3D tumor models and Balb/c nude mice were utilized.
• Analysis of tumor energetic metabolism, cytokine profiles, and neutrophil extracellular traps (NETs) formation.

Main Results:

• Demonstrated bidirectional communication between glioblastoma and neutrophils, fostering an immunosuppressive TME.
• Neutrophil involvement in tumor malignancy was time- and concentration-dependent.
• Identified a mitochondria mismatch influencing the TME secretome and a pro-neutrophil recruitment cytokine milieu in GB patients.
• Glioma-neutrophil crosstalk sustains tumor activation via NETs, involving NFκB signaling.
• Clinical data linked neutrophil-lymphocyte ratio (NLR), IL-1β, and IL-10 to poor glioblastoma outcomes.

Conclusions:

• Neutrophils are reprogrammed by glioblastoma to promote tumor progression.
• Understanding glioma-neutrophil crosstalk is crucial for comprehending tumor progression and immune cell involvement.
• Findings suggest potential therapeutic strategies targeting neutrophil-mediated immunosuppression in glioblastoma.