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Intratracheal Delivery of mRNA Lipid Nanoparticles Reprograms Alveolar Macrophages for Pulmonary Cancer Immunotherapy

Academic source · ACS Nano

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Site published: 2026-11-03 · Updated: 2026-11-03

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What the paper reports

Comparing intranasal and intratracheal vaccination, researchers found that total lung expression alone poorly predicted functional delivery to alveolar macrophages. Intratracheal mRNA-LNP delivery produced stronger macrophage transfection and antigen presentation, with improved tumor control in pulmonary models. Depleting alveolar macrophages eliminated protection, supporting their mechanistic role. These administration and efficacy findings remain preclinical.

Why this paper is included

Demonstrates that administration route and cell-level expression can outweigh bulk organ signals; human pulmonary tolerability and efficacy remain untested.

The interpretation above is analysis, not a conclusion attributed to the original source.

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