Prognostic value of integrin αV expression and localization pattern in invasive breast carcinomas

Area of Science:

• Oncology
• Cell Biology
• Biochemistry

Background:

• Breast cancer invasion involves extracellular matrix remodeling and epithelial-mesenchymal transition (EMT).
• Integrins mediate cell-extracellular matrix interactions, influencing cell behavior and fate.
• Altered integrin expression and localization are observed in transformed epithelial cells.

Purpose of the Study:

• To investigate the expression and localization of integrin alphaV in human breast cancer.
• To correlate integrin alphaV patterns with clinical parameters and patient survival.
• To explore the prognostic value of integrin alphaV in breast cancer metastasis.

Main Methods:

• Analysis of 345 human breast cancer tissue microarrays (TMA).
• Assessment of integrin alphaV expression and localization patterns.
• Correlation analysis with clinical data and interrogation of public datasets (e.g., MYH11 mRNA).
• Utilizing a 3D cell culture model.

Main Results:

• Lower integrin alphaV staining correlated with reduced cancer-specific survival.
• Peripheral integrin alphaV staining, present in DCIS, was lost in invasive components.
• Loss of peripheral integrin alphaV and stromal integrin alphaV presence indicated poor survival and metastasis.
• High co-expression of integrin alphaV and MYH11 mRNA correlated with better outcomes.

Conclusions:

• Integrin alphaV expression levels and tissue localization are prognostic indicators in breast cancer.
• Integrin alphaV patterns can help predict patients at higher risk of metastasis.
• Further research into integrin alphaV's role in breast cancer progression is warranted.