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- W4386529893 abstract "Abstract Canine soft tissue sarcomas (STS) are common neoplasms and considered immune deserts. Tumour infiltrating lymphocytes are sparse in STS and, when present, tend to organize around blood vessels or at the periphery of the neoplasm. This pattern is associated with an immunosuppressive tumour microenvironment linked to overexpression of molecules of the PD‐axis. PD‐1, PD‐L1 and PD‐L2 expression correlates with malignancy and poor prognosis in other neoplasms in humans and dogs, but little is known about their role in canine STS, their relationship to tumour grade, and how different therapies affect expression. The objective of this study was to evaluate the expression of checkpoint molecules across STS tumour grades and after tumour ablation treatment. Gene expression analysis was performed by reverse‐transcriptase real‐time quantitative PCR in soft tissue sarcomas that underwent histotripsy and from histologic specimens of STS from the Virginia Tech Animal Laboratory Services archives. The expression of PD‐1, PD‐L1 and PD‐L2 was detected in untreated STS tissue representing grades 1, 2, and 3. Numerically decreased expression of all markers was observed in tissue sampled from the treatment interface relative to untreated areas of the tumour. The relatively lower expression of these checkpoint molecules at the periphery of the treated area may be related to liquefactive necrosis induced by the histotripsy treatment, and would potentially allow TILs to infiltrate the tumour. Relative increases of these checkpoint molecules in tumours of a higher grade and alongside immune cell infiltration are consistent with previous reports that associate their expression with malignancy." @default.
- W4386529893 created "2023-09-09" @default.
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- W4386529893 date "2023-09-07" @default.
- W4386529893 modified "2023-10-14" @default.
- W4386529893 title "Inhibitory checkpoint molecule <scp>mRNA</scp> expression in canine soft tissue sarcoma" @default.
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- W4386529893 doi "https://doi.org/10.1111/vco.12934" @default.
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- W4386529893 hasPublicationYear "2023" @default.
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