Dual‐Action 3D Bioprinted Scaffolds with MXene Quantum Dots for Tumor Suppression and Breast Tissue Regeneration Postmastectomy

Breast cancer remains among the most prevalent malignancies affecting women globally. Current treatment approaches, including mastectomy, chemotherapy, and radiotherapy, often fail to prevent cancer recurrence and can result in substantial tissue damage, esthetic concerns, and diminished quality of life. Three‐dimensional (3D) bioprinting, stem cell‐based technologies, and MXene nanomaterials show promise in tissue repair and cancer treatment. However, there is a lack of strategies that can offer multiple effects, preventing both breast tissue regeneration and tumor recurrence. In this study, we developed 3D hydrogel scaffolds incorporating stem cells and MXene quantum dots (MQDs) for in vivo application in a mouse model of breast cancer. We compared cellular, acellular, cellular MQD, and acellular MQD scaffolds transplanted into mouse after tumor resection and mastectomy. Notably, the acellular MQD group showed no tumor recurrence by day 14. It demonstrated superior tissue regeneration, confirmed by histological and immunostaining analyses. As a result, we offer a nanotechnological 3D scaffold based on hydrogel with dual functionality in preventing tumor recurrence and facilitating tissue regeneration. This innovative approach has the potential to revolutionize breast cancer treatment by reducing dependence on chemotherapy and radiotherapy. Thus, it offers a promising alternative for improving patient treatment outcomes.

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