Prolonged Survival of Neutrophils Induced by Tumor-Derived G-CSF/GM-CSF Promotes Immunosuppression and Progression in Laryngeal Squamous Cell Carcinoma
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View abstract on PubMed
Summary
This summary is machine-generated.Tumor-associated neutrophils (TANs) in laryngeal cancer survive longer due to tumor factors, suppressing immune cells. Blocking these factors may offer a new cancer therapy strategy.
Area Of Science
- Oncology
- Immunology
- Cell Biology
Background
- Tumor-associated neutrophils (TANs) are crucial in tumor progression and exhibit prolonged survival.
- The mechanisms behind TANs' extended lifespan and their role in laryngeal squamous cell carcinoma (LSCC) are not fully understood.
Purpose Of The Study
- To investigate the mechanisms of prolonged TAN survival in LSCC.
- To determine the impact of extended TAN survival on the tumor microenvironment and patient prognosis.
- To explore potential therapeutic strategies targeting neutrophil survival.
Main Methods
- Analysis of TAN apoptosis in LSCC.
- Investigation of signaling pathways (PI3K-AKT) and protein expression (Mcl-1, Caspase-3) involved in neutrophil survival.
- Assessment of aged CXCR4+ neutrophil accumulation and immunosuppressive properties.
- Evaluation of TAN effects on CD8+ T cell function and LSCC tumor growth in vitro and in vivo.
- Experimental blockade of G-CSF and GM-CSF signaling.
Main Results
- Tumor-derived G-CSF and GM-CSF significantly delay TAN apoptosis via PI3K-AKT activation, Mcl-1 upregulation, and Caspase-3 downregulation.
- Prolonged TAN survival leads to accumulation of immunosuppressive CXCR4+ neutrophils, correlating with poor prognosis.
- Extended TAN survival enhances their ability to suppress CD8+ T cells, promoting LSCC progression.
- Blocking G-CSF and GM-CSF reversed these effects.
Conclusions
- Pathologically prolonged neutrophil survival in LSCC impairs CD8+ T cell immunity.
- Targeting neutrophil survival presents a potential therapeutic strategy for LSCC and other tumors.
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