An "elite hacker": breast tumors exploit the normal microenvironment program to instruct their progression and...

Area of Science:

• Oncology
• Cell Biology
• Developmental Biology

Background:

• Significant progress in understanding tumor genetics has been made since the
• The role of the stromal microenvironment in cancer, particularly breast cancer, is increasingly recognized.
• Breast cancer progression shares similarities with normal mammary gland development, including shared molecular, cellular, and microenvironmental influences.

Purpose of the Study:

• To review cellular and molecular interactions within the normal mammary gland microenvironment.
• To present evidence of similar, albeit exaggerated, biological processes in breast cancer progression.
• To explore the potential of targeting microenvironmental signaling for therapeutic benefit.

Main Methods:

• Review of existing literature on mammary gland development and breast cancer biology.
• Analysis of cellular and molecular interactions within the tumor microenvironment.
• Examination of multigene signatures in relation to microenvironmental signaling.

Main Results:

• Normal mammary gland development relies on specific heterotypic cellular and molecular interactions within the microenvironment.
• Breast cancer progression, especially the transition to invasive disease, mirrors normal development but in an imbalanced manner.
• Multigene signatures used to predict cancer outcomes may largely reflect signals from a heterogeneous microenvironment.

Conclusions:

• Understanding the normal mammary gland microenvironment and its vulnerabilities is crucial for developing targeted breast cancer therapies.
• The tumor microenvironment plays a critical role in breast cancer progression.
• Exploiting the signaling from the heterogeneous microenvironment presents a potential therapeutic strategy.