Study of Propranolol in Newly Diagnosed Breast Cancer Patients Undergoing Neoadjuvant Chemotherapy

While a number of therapeutic options exist for patients with breast cancer (BC), breast tumor biology is differs across tumors and not all BCs respond to treatment. Identifying a marker predicting response could spare non-responders unnecessary side effects, cost, and time. A recent example in BC is bevacizumab, an expensive anti-angiogenic monoclonal antibody, for which the FDA revoked approval for patients with metastatic BC. While this targeted therapy may benefit some patients, no appropriate predictive marker has been identified in the drug development process. An ideal biologic marker would be easy to perform, reliable, low-cost and non-invasive. A limitation of assessing tumor-based markers in metastatic BC is the inability to procure tumor tissue at different treatment times. To circumvent this issue, anti-cancer agents can be assessed pre-operatively, where women with newly diagnosed BC receive a study drug, alone or with chemotherapy, between diagnostic breast biopsy and surgical resection. In addition, tumor changes can be directly compared to modulation of non-invasive markers, such as functional radiographs or blood, to identify a non-invasive marker predicting tumor response.

The investigators are conducting a neoadjuvant single-institution trial with the non-selective, inexpensive β -blocker propranolol with chemotherapy in locally advanced BC. β-blockade regulates angiogenesis in primary breast tumors. In these trials, the investigators plan to evaluate treatment-related microvascular response via changes in breast Diffuse Optical Tomography (DOT), a non-invasive, fast, safe, and inexpensive breast imaging tool. As the optical property contrast from endogenous chromophores (oxyhemoglobin, deoxyhemoglobin, water, and lipid) provides information on tissue vascularity, it can monitor response to anti-angiogenic agents. DOT changes occur as early as 1 week after starting pre-operative therapy. The dynamic DOT system incorporated in these trials is unique to Columbia University Medical Center (CUMC), as it has been designed by Columbia biomedical engineers. CUMC's laboratory collaborators have measured this DOT system with anti-angiogenesis agents in animal models, demonstrating the translational nature of this project. While non-dynamic DOT has been assessed in other neoadjuvant trials with small cohorts receiving heterogeneous chemotherapy agents, none have evaluated DOT response to anti-angiogenic agents.