Abstract
In clinical practice, surgery is the preferred treatment for breast cancer; however, the high recurrence rate due to residual tumors after surgery remains a major issue. Hydrogels can reduce the side effects of residual tumors and exert strong anticancer effects, thereby showing potential as therapeutic agents for suppressing tumor recurrence after surgery. Glucose oxidase (GOD)-immobilized gelatin hydrogels (GOD-gelatin hydrogel) were prepared by bioorthogonal click chemistry. Then, the anticancer effect, tumor recurrence inhibition, and biodegradability of the resulting hydrogels were evaluated through cell and animal experiments. GOD-gelatin hydrogel showed cytotoxicity and anticancer effect via H2O2 generation. Unlike free GOD, GOD-gelatin hydrogel remained in the surgical site after implant and continued to suppress tumor recurrence over time. The proposed GOD-gelatin hydrogel system can be easily implanted at the surgical site after tumor surgery, representing a novel treatment to suppress tumor recurrence without any systemic toxicity.
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