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Phase II Trial Shows Repurposed Drugs Clear Dormant Breast Cancer Cells With Few Recurrences

The Nature Medicine report prompted larger validation studies to test whether targeting minimal residual disease can prevent relapse.

Overview

  • In the randomized Phase II CLEVER trial of 51 breast cancer survivors with minimal residual disease, short-course therapy cleared dormant cells in 80% of participants.
  • Three-year recurrence-free survival exceeded 90% for patients on single-drug arms and reached 100% for those who received the two-drug combination.
  • After a median 42 months of follow-up, only two patients in the cohort experienced a recurrence.
  • Dormant cells were identified through bone marrow screening, and the study used FDA-approved drugs repurposed from other indications based on preclinical evidence involving autophagy and mTOR pathways.
  • Researchers are enrolling larger Phase II studies, ABBY and PALAVY, to confirm efficacy and safety, with support from the National Cancer Institute, the Department of Defense, and major foundations.