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In Episode 118, Host Erin Harris talks to Alexander Cryer, Ph.D., Instructor in Medicine at Mass General Brigham, about a proof of concept strategy that reprograms tumor cells with mRNA lipid nanoparticles to overactivate the cGAS-STING pathway, forcing cancer cells to produce and export large amounts of the innate immune agonist cGAMP to stimulate surrounding immune cells and drive anti-tumor immunity. Dr. Cryer explains the basic biology of cGAS-STING and how his team restored this pathway in tumor cells and leveraged intratumoral LNP delivery to overcome nucleic acid delivery and targeting challenges. He also discusses future directions, the need to move beyond intratumoral administration with more targeted systemic delivery, and the broader concept of turning the tumor’s own abundant cell population and evolutionarily conserved innate immune pathways into therapeutic allies rather than obstacles.

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