articleNature MedicineJan 24, 2025HYBRID OA

Digoxin for reduction of circulating tumor cell cluster size in metastatic breast cancer: a proof-of-concept trial

University of Basel · University Hospital of Basel · +8 more institutions

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Abstract

Abstract The presence of circulating tumor cell (CTC) clusters is associated with disease progression and reduced survival in a variety of cancer types. In breast cancer, preclinical studies showed that inhibitors of the Na + /K + ATPase suppress CTC clusters and block metastasis. Here we conducted a prospective, open-label, proof-of-concept study in women with metastatic breast cancer, where the primary objective was to determine whether treatment with the Na + /K + ATPase inhibitor digoxin could reduce mean CTC cluster size. An analysis of nine patients treated daily with a maintenance digoxin dose (0.7–1.4 ng ml −1 serum level) revealed a mean cluster size reduction of −2.2 cells per cluster upon treatment…

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