On April 18, 2018 Oncolytics Biotech Inc. (TSX: ONC) (OTCQX: ONCYF), currently developing REOLYSIN (pelareorep), an intravenously delivered immuno-oncolytic virus turning cold tumors hot, reported two posters highlighting data from pelareorep studies presented at the American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting 2018. The conference takes place April 14-18, 2018, in Chicago (Press release, Oncolytics Biotech, 18 18, 2018, View Source [SID1234525555]).
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"These posters add additional confirmation of pelareorep’s promotion of an inflammatory signature in different cell lines," said Dr. Matt Coffey, President and CEO of Oncolytics Biotech. "The study by doctor Wilkinson demonstrates that pelareorep can establish an inflamed tumor phenotype and the presentation by doctor Goel highlights the synergistic combination of pelareorep and an anti-PD1 agent. Taken together, these findings highlight that pelareorep is priming the immune system and enhancing the activity of checkpoint blockade. As MSS CRC typically does not respond to checkpoint blockade, viral priming could expand the use of this drug class by making non-susceptible tissue susceptible by turning cold tumors hot. This work will of course lead to additional studies in combination with other immunotherapies."
Presenter: Sanjay Goel, MD, Associate Professor of Medicine, Montefiore Medical Center
Presentation Title: Potentiating effect of reovirus in anti-PD1 therapy in colorectal cancer
Session Title: Receptor Targeting and the Tumor Microenvironment
Location: Poster Section 38
Poster Board #: 17
Poster Number: 3917
Data presented in the poster demonstrated:
pelareorep administration increased PD-L1 expression on MSS CRC cells;
possible evidence of a vaccine effect: immunologically competent mice were re-challenged with the original tumor and the tumor was unable to propagate;
combination therapy made statistically significant improvements in survival compared to controls in both BALB/c (median 42 vs. 16 days, p=0.003) and C57BL/6 (median 24 vs. 17 days, p=0.02) mice; and
pelareorep treated xenografted tumor tissue showed a higher infiltration of T lymphocytes as confirmed by CD8-positive and intensified granzyme staining.
Presenter: Grey Wilkinson, PhD, Translational Scientist, Oncolytics Biotech
Presentation Title:
Pelareorep promotes the expression of a chemokine signature that predicts response to immunotherapy
Session Title: Immunomodulatory Agents and Interventions 2
Location: Poster Section 33
Poster Board #: 10
Poster Number: 4707
Data presented in the poster demonstrated:
the expression of a chemokine signature that predicts response to immunotherapy;
global changes in gene expression are unique and different for each cell line following pelareorep infection and changes in gene expression occur before significant cell lysis;
pelareorep differentially promotes the expression of innate and adaptive immunity related genes in HCC, CRC, NSCLC cell lines; and
pelareorep promotes the expression of gene signatures that predict response to immuno-therapies in HCC cells.
These posters are now available on the Posters & Publications page of the company’s website: www.oncolyticsbiotech.com/technology/posters-publications.
About REOLYSIN/Pelareorep
REOLYSIN, also known as pelareorep, is a non-pathogenic, proprietary isolate of the unmodified reovirus: a first-in-class intravenously delivered immuno-oncolytic virus for the treatment of solid tumors and hematological malignancies. The compound induces selective tumor lysis and promotes an inflamed tumor phenotype through innate and adaptive immune responses to treat a variety of cancers.