Systematic review examines tumor microenvironment mechanisms in lung cancer brain metastases

This systematic review investigates the mechanisms of tumor-microenvironment interactions and emerging therapeutic frontiers in the context of lung cancer brain metastases. The authors examine several critical processes, including blood-brain barrier disruption, the formation of an immunosuppressive niche, neural co-optation, metabolic adaptation, and peripheral immune dysregulation.

The synthesis indicates that brain metastasis development is driven by dynamic and complex interactions between tumor cells and the central nervous system microenvironment. The review explores various secondary therapeutic targets, such as interventions to preserve vascular-neural integrity, the interception of neurotransmitter-mediated tumor support, the reprogramming of brain resident cells, the exploitation of metabolic vulnerabilities, and the engineering of advanced delivery systems.

Despite these identified frontiers, the authors note that current therapeutic strategies face significant challenges, specifically intrinsic resistance and delivery barriers. The review highlights the need for approaches that target the immune microenvironment and neuromodulation to overcome these obstacles.

For clinicians, these findings provide a framework for understanding the biological complexity of the metastatic niche. While the identified mechanisms offer potential directions for future drug development and delivery engineering, the presence of intrinsic resistance necessitates cautious interpretation of these emerging therapeutic targets.