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Aminoflavone Inhibits Α6-Integrin And Growth Of Tamoxifen Resistant Breast Cancer, Petreena S. Campbell
Aminoflavone Inhibits Α6-Integrin And Growth Of Tamoxifen Resistant Breast Cancer, Petreena S. Campbell
Loma Linda University Electronic Theses, Dissertations & Projects
Approximately 40% of estrogen receptor positive (ER+) breast cancer patients develop resistance to standard of care agent tamoxifen, while ER negative (ER-) breast cancer patients are intrinsically resistant to tamoxifen. Resistance often promotes metastasis, recurrence and death. Tumor-initiating cells (TICs) represent key contributors to resistance and adhesion protein α6-integrin is a putative TIC biomarker. Investigational agent Aminoflavone (AF) demonstrates efficacy against breast cancer cells irrespective of ER status. Interestingly, we found tamoxifen resistant (TamR) cells and tumors exhibited elevated α6-integrin expression in comparison to their tamoxifen sensitive counterparts. AF effectively disrupted mammospheres enriched for TICs and reduced α6-integrin levels in …