Breast Cancer Clinical Trial
Official title:
A Pilot Study to Evaluate Biomarkers and Safety of Dapagliflozin Concomitant With Neoadjuvant Therapy for Patient With HER2-negative Early-stage Breast Cancer and Hyperinsulinemia
The primary objective of the study is to assess metabolic plasma markers of insulin resistance in patients with early-stage HER2-negative breast cancers receiving dapagliflozin concomitant with neoadjuvant therapy.
This is a single arm, open label trial that will evaluate changes in plasma markers of insulin resistance, namely, fasting glucose and insulin, measured as the HOMA-IR score, as well as the safety of the addition of dapagliflozin to neoadjuvant treatment in hyperinsulinemic women with newly diagnosed early stage HER2-negative breast cancers who are candidates for neoadjuvant therapy. Hypotheses are: (i) the SGLT2 inhibitor, dapagliflozin, administered concomitantly with weekly neoadjuvant therapy in hyperinsulinemic women with newly diagnosed HER2-negative breast cancers will lead to a decrease in fasting plasma insulin and glucose and thus, a downregulation in downstream insulin signaling in the tumor as measured by Protein kinase B (PKB)/AKT phosphorylation. (ii) that dapagliflozin can be safely coadministered at full dose with multiagent chemotherapy or chemo-immunotherapy. Routine, standard of care neoadjuvant chemotherapy, with or without immunotherapy, will be given together with the investigational product. Acceptable chemotherapy regimens include: 1) weekly paclitaxel x12 treatments followed by every two-week doxorubicin, cyclophosphamide (ddAC) x 4 treatments (ddAC-T; ); 2) pembrolizumab every 3 weeks (Q3W), with carboplatin + weekly paclitaxel (cycles 1-4) x12 weeks followed by ddAC x 4 treatments (cycles 5-8) (KEYNOTE-522 regimen; only for participants with stage II-III ER/PR and HER-negative breast cancer); 3) docetaxel plus cyclophosphamide and 4) docetaxel plus carboplatin. The primary objective of the study is to assess metabolic plasma markers of insulin resistance in participants with early-stage HER2-negative breast cancers receiving dapagliflozin concomitant with neoadjuvant therapy. Secondary objectives are to: (i) assess changes in the levels of additional plasma markers of insulin signaling from baseline (before treatment), to during (on-treatment) and immediately after neoadjuvant therapy (post-treatment), and (ii) assess tissue expression of insulin signaling intermediates and SGLT2 by immunohistochemistry (IHC) on pre- on- and post-treatment tissue samples. Outcomes will be assessed before treatment and 12 weeks post treatment (after completion of all neoadjuvant therapy but before surgery). ;
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