Multifactoral immune modulation potentiates durable remission in multiple models of aggressive malignancy

Area of Science:

• Oncology
• Immunology
• Cancer Therapy

Background:

• Tumors evade immune surveillance by lacking danger signals and employing immunomodulatory mechanisms.
• Single-agent immunotherapies often fail to induce durable antitumor responses due to tumor defense strategies.

Purpose of the Study:

• To investigate a unique combination therapy of immunomodulatory and cytostatic agents.
• To assess the efficacy of this combination in reconditioning the tumor microenvironment and eliminating difficult-to-treat tumors.

Main Methods:

• Treatment of preclinical models including triple-negative breast cancer (TNBC), head and neck squamous cell carcinoma (HNSCC), and neuroblastoma.
• Evaluation of therapeutic effects on tumor elimination, metastasis, and immune response.
• Single-cell RNA sequencing (scRNA-seq) to analyze tumor microenvironment remodeling.

Main Results:

• The combination therapy demonstrated significant efficacy, curing a majority of TNBC tumors and eliminating metastatic spread.
• Similar positive outcomes were observed in HNSCC and neuroblastoma models.
• scRNA-seq revealed early upregulation of innate immunity and antigen presentation, and highlighted the role of the autonomic nervous system.

Conclusions:

• Targeting multiple pathways with this combination therapy yields substantial synergistic antitumor effects.
• The findings support further investigation of this approach, particularly in the neoadjuvant setting.