The microenvironment of brain metastases from solid tumors.

Area of Science:

• Neuro-oncology
• Cancer Biology
• Immunology

Background:

• Brain metastasis (BrM) is a severe complication of cancer with poor prognosis.
• The brain tumor microenvironment (TME) presents unique biological and physical barriers to treatment.
• Current therapies often fail due to the TME's resistance mechanisms.

Purpose of the Study:

• To review the unique characteristics of the brain TME in the context of brain metastases.
• To explore the interplay between cancer cells and the CNS TME.
• To identify therapeutic opportunities within the TME for BrM.

Main Methods:

• Literature review of studies on brain metastasis and the TME.
• Analysis of the biological, immunological, and metabolic đặc điểm of the CNS TME.
• Synthesis of information on cancer cell adaptation within the CNS.

Main Results:

• The TME includes the blood-brain barrier, unique immune cells, specific metabolic conditions, and distinct intercellular interactions.
• Cancer cells exploit CNS vulnerabilities for proliferation.
• The TME significantly contributes to treatment resistance and poor outcomes in BrM.

Conclusions:

• The TME is a critical determinant of BrM progression and treatment response.
• Targeting the unique aspects of the brain TME offers promising avenues for novel BrM therapies.
• Further research into the TME is essential for improving patient outcomes.