Breaking through to the Other Side: Microenvironment Contributions to DCIS Initiation and Progression

Area of Science:

• Oncology
• Cancer Biology
• Pathology

Background:

• Breast cancer survival has improved due to advancements in detection and treatment.
• A critical unmet need is identifying non-invasive lesions with metastatic potential.
• Current strategies focus on cancer cell alterations, overlooking the tumor microenvironment's role.

Purpose of the Study:

• To review the mechanisms of microenvironment interaction with ductal carcinoma in situ (DCIS).
• To highlight the contributions of stromal cells (myoepithelial, fibroblasts, immune cells) to invasion and progression.
• To explore potential biomarkers and therapeutic interventions targeting the tumor microenvironment.

Main Methods:

• Literature review of recent studies on breast cancer microenvironment.
• Analysis of mechanisms involving myoepithelial cells, fibroblasts, and immune cells in DCIS progression.
• Synthesis of knowledge for biomarker and therapeutic development.

Main Results:

• The tumor microenvironment, including stromal cells, actively promotes DCIS invasion and immune escape.
• Specific cellular interactions within the microenvironment are critical for tumor progression.
• Understanding these interactions is key to predicting lesion behavior.

Conclusions:

• The tumor microenvironment is integral to breast cancer initiation and progression.
• Targeting stromal interactions offers novel strategies for managing DCIS.
• Biomarkers derived from microenvironment analysis could improve patient stratification and treatment.