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- W4285086656 abstract "Ovarian cancer accounts for more deaths than any other cancer of the female reproductive system. Patients bearing ovarian tumors infiltrated with high frequencies of T cells associate with a greater survival probability. However, therapeutic strategies targeting T cells in ovarian cancers are largely ineffective. We have observed in our models of late-stage murine ovarian cancer that in the absence of Toll-Like Receptor 5 (TLR5) signaling, anti-PD-L1 therapy promotes significant survival and subsequent protection against tumor rechallenge. Ovarian tumors from rechallenged TLR5KO mice exhibited significantly higher frequency/number of both CD4 and CD8 effector memory T cell subsets and greater numbers of antigen experienced T cells. Thus, in the absence of TLR5 signaling, T cells are better able to mount/maintain a response to ovarian tumors after inhibitory receptor blockade. Furthermore, protection against tumor progression in TLR5KO mice corresponds with a significant increase in tumor infiltrating cross presenting and IL-12 producing Dendritic cells (DCs) which could account for the differences in T cell infiltrates. We hypothesize that TLR5 signaling functionally alters DCs to become more suppressive in the tumor microenvironment, impacting T cell differentiation and anti-tumor activity, thereby reducing survival during ovarian tumor progression with aPD-L1 therapy. Clinical implications are already present, as roughly 7.5% of the general population harbor a TLR5 SNP that diminishes TLR5 signaling and is associated with increased long-term survival for ovarian cancer patients. Therefore, patients who express the TLR5 SNP may immediately benefit from anti-PDL1 therapy and those without the SNP, TLR5 antagonism. Supported by NIH/NCI 1R01CA253285 UVA CIC Collaborative Grant" @default.
- W4285086656 created "2022-07-14" @default.
- W4285086656 creator A5029841390 @default.
- W4285086656 date "2022-07-13" @default.
- W4285086656 modified "2023-09-27" @default.
- W4285086656 title "Pronouncing my name as best you can matters to me as your colleague" @default.
- W4285086656 cites W4281623922 @default.
- W4285086656 doi "https://doi.org/10.1136/bmj.o1696" @default.
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- W4285086656 hasPublicationYear "2022" @default.
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