Davola, Maria Eugenia, Cormier, Olga, Vito, Alyssa, El-Sayes, Nader, Collins, Susan, Salem, Omar, Revill, Spencer, Ask, Kjetil, Wan, Yonghong and Mossman, Karen (2023) Oncolytic BHV-1 Is Sufficient to Induce Immunogenic Cell Death and Synergizes with Low-Dose Chemotherapy to Dampen Immunosuppressive T Regulatory Cells. Cancers, 15 (4). ISSN 2072-6694

Abstract

Immunogenic cell death (ICD) can switch immunologically "cold" tumors "hot", making them sensitive to immune checkpoint inhibitor (ICI) therapy. Many therapeutic platforms combine multiple modalities such as oncolytic viruses (OVs) and low-dose chemotherapy to induce ICD and improve prognostic outcomes. We previously detailed many unique properties of oncolytic bovine herpesvirus type 1 (oBHV) that suggest widespread clinical utility. Here, we show for the first time, the ability of oBHV monotherapy to induce bona fide ICD and tumor-specific activation of circulating CD8 T cells in a syngeneic murine model of melanoma. The addition of low-dose mitomycin C (MMC) was necessary to fully synergize with ICI through early recruitment of CD8 T cells and reduced infiltration of highly suppressive PD-1 Tregs. Cytokine and gene expression analyses within treated tumors suggest that the addition of MMC to oBHV therapy shifts the immune response from predominantly anti-viral, as evidenced by a high level of interferon-st

Item Type:	Article
Date Deposited:	28 Dec 2024 00:45
Last Modified:	28 Dec 2024 00:45
URI:	https://oak.novartis.com/id/eprint/56187