ENPP1 limits efficacy of radiation therapy in a murine pancreatic cancer model
Document Type
Presentation
Publication Date
10-16-2022
Keywords
oregon; portland; chiles
Abstract
The aberrant regulation of replication in cancer cells and the effect of cytotoxic therapies can result in increased cGAMP production in tumors, resulting in STING activation and secretion of inflammatory cytokines. Ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) decreases cGAMP availability in the tumor, resulting in decreased STING pathway activation following cytotoxic therapy such as radiation therapy (RT). We hypothesize that removal of ENPP1 has potential to improve outcomes following cytotoxic therapy by optimizing STING pathway activation, and therefore enhancing anti-tumor immunity. We tested this in a murine pancreatic cell line with high expression of ENPP1. We found that removal of ENPP1 from this high expressing cancer line slowed tumor growth. Furthermore, we showed that RT treatment is more effective when ENPP1 is removed from this cell line. Therefore, ENPP1 inhibition has potential application alongside radiation therapy in patients to improve outcomes.
Area of Special Interest
Cancer
Specialty/Research Institute
Oncology
Comments
Radiation Research Society Annual Meeting; October 16-19; Waikoloa Village, HI. 2022.