Significance of RCC2, Rac1 and p53 Expression in Breast Infiltrating Ductal Carcinoma; An Immunohistochemical Study

Area of Science:

• Oncology
• Molecular Biology
• Cancer Research

Background:

• Regulator of chromosome condensation 2 (RCC2) and RAS-related C3 botulinum toxin substrate 1 (Rac1) are implicated in breast cancer cell proliferation and migration.
• A p53/RCC2/Rac1 signaling pathway is proposed to regulate colon cancer metastasis, but its role in breast cancer remains under-investigated.

Purpose of the Study:

• To investigate the immunohistochemical expression and correlations of RCC2, Rac1, and p53 in breast infiltrating ductal carcinoma (IDC).

Main Methods:

• Immunohistochemical staining for RCC2, Rac1, and p53 on 120 breast IDC specimens.
• Statistical analysis to determine correlations between the expression of these markers.

Main Results:

• High expression of RCC2 (96.7%), Rac1 (100%), and p53 (27.5%) was observed.
• RCC2, Rac1, and p53 expression correlated with poor prognostic indicators including frequent mitoses, high Ki-67, lymphovascular invasion, and advanced tumor stage.
• A significant direct correlation was found between all three markers.

Conclusions:

• Elevated RCC2, Rac1, and p53 levels in breast IDC suggest a role in tumor progression.
• RCC2 and Rac1 may serve as predictive indicators for aggressive breast tumors, potentially benefiting from targeted therapies.