Controlled Inflammation Drives Neutrophil‐Mediated Precision Drug Delivery in Heterogeneous Tumors

Abstract Tumor heterogeneity remains a formidable obstacle in targeted cancer therapy, often leading to suboptimal treatment outcomes. This study presents an innovative approach that harnesses controlled inflammation to guide neutrophil‐mediated drug delivery, effectively overcoming the limitations imposed by tumor heterogeneity. By inducing localized inflammation within tumors using lipopolysaccharide, it significantly amplify the recruitment of drug‐laden neutrophils to tumor sites, irrespective of specific tumor markers. This strategy not only enhances targeted drug delivery but also triggers the release of neutrophil extracellular traps, further potentiating the anti‐tumor effect. Crucially, this study demonstrates that potential systemic inflammatory responses can be effectively mitigated through neutrophil transfusion, ensuring the safety and clinical viability of this approach. In a murine breast cancer model, the method significantly impedes tumor growth compared to conventional treatments. This work offers a versatile strategy for precise drug delivery across diverse tumor types. The findings pave the way for more effective and broadly applicable cancer treatments, potentially addressing the long‐standing challenge of tumor heterogeneity.