Abstract
Breast cancer remains a major global health challenge, demanding better diagnostic tools. Traditional methods like mammography have limitations, highlighting the need for specific, non-invasive approaches. Protein biomarkers offer a promising avenue for early and accurate detection, potentially leading to improved patient outcomes and personalized treatment. This review explores key protein biomarkers, including Estrogen Receptor (ER), Progesterone Receptor (PR), Human Epidermal Growth Factor Receptor 2 (HER-2), and Cancer Antigen 27.29(CA27.29), focusing on the proteomic methodologies used in their discovery and validation. However, challenges exist, such as variability in biomarker expression and limitations in abundance, stability, and specificity, which hinder clinical use. The review discusses innovative strategies to overcome these challenges, emphasizing the importance of translating biomarker research into practical applications for personalized medicine in breast cancer diagnosis and therapy. This exploration contributes to the evolving field of breast cancer diagnostics, paving the way for future discoveries and improved patient care.
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