Mn<sub>3</sub>O<sub>4</sub>-potentiated bifunctional hydrogel for mild temperature-controlled tumor ablation and osteogenesis.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41078860.
- Also identified by DOI 10.1016/j.bioactmat.2025.09.037 and PMC identifier 12508912.
- Licence recorded as CC BY-NC-ND.
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Abstract
Postoperative bone reconstruction after tumor resection remains challenging due to tumor recurrence and poor osteogenesis. Although photothermal scaffolds can ablate tumors (via high heat) and stimulate bone formation (via mild heat), balancing these effects is difficult-excessive heat damages tissue, while insufficient heat fails to eliminate tumors. Here, we develop an injectable Mn<sub>3</sub>O<sub>4</sub>-enhanced hydrogel (GM/OD/Mn<sub>3</sub>O<sub>4</sub>) to address this. Mn<sub>3</sub>O<sub>4</sub> nanosheets, firstly synthesized via biomineralization, exhibit high photothermal efficiency and enzyme-mimetic activity (glucose oxidase/peroxidase-like). The hydrogel adapts to irregular defects and releases Mn<sub>3</sub>O<sub>4</sub> in acidic tumor microenvironments. Through catalytic cascades, it depletes ATP and inhibits heat shock proteins, overcoming tumor thermoresistance and enabling effective ablation at mild temperatures (43 °C). Lower NIR power (40 °C) further enhances osteogenesis. In vivo, the hydrogel suppresses tumor recurrence while promoting bone regeneration, offering a dual-functional strategy for postoperative bone repair.