Pathogenesis of Triple-Negative Breast Cancer

Area of Science:

• Oncology
• Genomics
• Immunology

Background:

• Triple-negative breast cancer (TNBC) is defined by the absence of key biomarkers, leading to a broad classification of diverse subtypes.
• TNBC presents significant therapeutic challenges due to its heterogeneity.
• Advances in omics technologies reveal the complex biology underlying TNBC.

Purpose of the Study:

• To review the histologic and molecular classifications of TNBC subtypes.
• To discuss genomic alterations and their role in TNBC pathogenesis.
• To explore the tumor microenvironment's impact on TNBC biology and treatment response.

Main Methods:

• Review of current literature on TNBC classification and molecular profiling.
• Analysis of genomic data from various TNBC subtypes.
• Examination of studies investigating the tumor microenvironment in TNBC.

Main Results:

• TNBC exhibits significant heterogeneity at histologic, genomic, and immunologic levels.
• Specific genomic alterations are associated with distinct TNBC subtypes and their pathogenesis.
• The tumor microenvironment plays a crucial role in TNBC biology and influences therapeutic outcomes.

Conclusions:

• Subtyping TNBC based on molecular and histologic characteristics is essential for understanding its diverse nature.
• Targeting specific genomic alterations and the tumor microenvironment holds promise for effective TNBC treatments.
• Precision medicine approaches tailored to individual TNBC subtypes are critical for improving patient outcomes.