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- W4361946661 abstract "<div>AbstractPurpose:<p>Intravenous delivery of oncolytic viruses often leads to tumor vascular shutdown, resulting in decreased tumor perfusion and elevated tumor hypoxia. We hypothesized that using 3TSR to normalize tumor vasculature prior to administration of an oncolytic Newcastle disease virus (NDV) would enhance virus delivery and trafficking of immunologic cell subsets to the tumor core, resulting in systemically enhanced immunotherapy and regression of advanced-stage epithelial ovarian cancer (EOC).</p>Experimental Design:<p>Using an orthotopic, syngeneic mouse model of advanced-stage EOC, we pretreated mice with 3TSR (4 mg/kg per day) alone or followed by combination with fusogenic NDV(F3aa) (1.0 × 10<sup>8</sup> plaque-forming units).</p>Results:<p>Treatment with 3TSR normalized tumor vasculature, enhanced blood perfusion of primary EOC tumors, and induced disease regression. Animals treated with combination therapy had the greatest reduction in primary tumor mass, ascites accumulation, and secondary lesions (50% of mice were completely devoid of peritoneal metastases). Combining 3TSR + NDV(F3aa) led to enhanced trafficking of immunologic cells into the primary tumor core.</p>Conclusions:<p>We have shown, for the first time, that NDV, like other oncolytic viruses, is a potent mediator of acute vascular shutdown and that preventing this through vascular normalization can promote regression in a preclinical model of advanced-stage ovarian cancer. This challenges the current focus on induction of intravascular thrombosis as a requisite for successful oncolytic virotherapy.</p><p><i>See related commentary by Bykov and Zamarin, p. 1446</i></p></div>" @default.
- W4361946661 created "2023-04-05" @default.
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- W4361946661 date "2023-03-31" @default.
- W4361946661 modified "2023-10-14" @default.
- W4361946661 title "Data from Combining Vascular Normalization with an Oncolytic Virus Enhances Immunotherapy in a Preclinical Model of Advanced-Stage Ovarian Cancer" @default.
- W4361946661 doi "https://doi.org/10.1158/1078-0432.c.6529271" @default.
- W4361946661 hasPublicationYear "2023" @default.
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