Discovery of breast cancer treatment resistance mechanism could lead to new hope for some

Mayo Clinic researchers have discovered a key reason why certain breast cancers might not respond to an important new class of therapeutics called antibody drug conjugates (ADCs). These treatments pair an antibody that targets cancer cells with a strong chemotherapy drug. For many patients with human epidermal growth factor receptor 2-positive (HER2+) breast cancers, ADCs such as trastuzumab deruxtecan (T-DXd) have dramatically improved outcomes.

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