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Fasting-mimicking diet reshapes antitumor immunity in cancer patients

ABSTRACT: To investigate whether the fasting-mimicking diet (FMD) affects intratumor immunity, we assessed the impact of one FMD cycle before surgery in matched tumor tissue specimens from 22 early-stage breast cancer patients. At the tumor level, FMD activated antitumor immune programs in early-stage breast cancer patients.

PROVIDER: EGAS00001004944 | EGA |

REPOSITORIES: EGA

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1c018b1d-777f-4abf-aaeb-94ef5be72146 - samples

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Project description:In preclinical experiments, cyclic fasting-mimicking diets (FMDs) showed broad anticancer effects in combination with chemotherapy. Among different tumor types, triple-negative breast cancer (TNBC) is exquisitely sensitive to FMD. However, the antitumor activity and efficacy of cyclic FMD in TNBC patients remain unclear. Here, we show that a severely calorie-restricted, triweekly, 5-day FMD regimen results in excellent pathologic complete response (pCR) rates (primary endpoint) and long-term clinical outcomes (secondary endpoints) when combined with preoperative chemotherapy in 30 patients with early-stage TNBC enrolled in the phase II trial BREAKFAST. Bulk and single-cell RNA-sequencing analysis revealed that highly glycolytic cancer cells, myeloid cells and pericytes from tumors achieving pCR undergo a significant, early downmodulation of pathways related to glycolysis and pyruvate metabolism. Our findings pave the wave for conducting larger clinical trials to investigate the efficacy of cyclic FMD in early-stage TNBC patients, and to validate early changes of intratumor glycolysis as a predictor of clinical benefit from nutrient restriction. ClinicalTrials.gov Identifier: NCT04248998

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