Journal
SCIENTIFIC REPORTS
Volume 9, Issue -, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41598-019-51332-4
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Focal ablative therapies have been primarily used for local tumor ablation. However, they often fail to impact systemic disease. Here we propose the use of low intensity focused ultrasound (LOFU), a noninvasive, nontoxic, conformal therapy, to deliver acoustic stress to the tumor for immune priming. We demonstrate that LOFU significantly induces expression and cell surface localization of heat shock proteins in murine breast (4T1) and prostate adenocarcinoma (TPSA23) cancer cell lines. In vivo LOFU followed by ablative radiation therapy (RT) results in primary tumor cure, upregulation of a cytotoxic immune response and induction of immunological memory by inhibiting secondary tumor growth upon re-challenge with tumor cells. We, therefore, describe a regimen of a combination therapy with noninvasive, acoustic immune priming and ablative radiation therapy to generate an in situ tumor vaccine, induce CD8+T cells against tumor-associated antigens and provide a viable oncologic treatment option for solid tumors.
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