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• W4385718963 endingPage "e200149" @default.
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• W4385718963 abstract "Background and Objectives Epstein-Barr virus (EBV) is a ubiquitous herpesvirus that establishes lifelong latency in memory B cells and has been identified as a major risk factor of multiple sclerosis (MS). B cell depletion therapies have disease-modifying benefit in MS. However, it is unclear whether this benefit is partly attributable to the elimination of EBV + B cells. Currently, there are no EBV-specific antiviral therapies available for targeting EBV latent infection in MS and limited experimental models to study EBV in MS. Methods In this study, we describe the establishment of spontaneous lymphoblastoid cell lines (SLCLs) generated ex vivo with the endogenous EBV of patients with MS and controls and treated with either an Epstein-Barr virus nuclear antigen 1 (EBNA1) inhibitor (VK-1727) or cladribine, a nucleoside analog that eliminates B cells. Results We showed that a small molecule inhibitor of EBNA1, a critical regulator of the EBV life cycle, blocks the proliferation and metabolic activity of these SLCLs. In contrast to cladribine, a highly cytotoxic B cell depleting therapy currently used in MS, the EBNA1 inhibitor VK-1727 was cytostatic rather than cytotoxic and selective for EBV + cells, while having no discernible effects on EBV − cells. We validate that VK-1727 reduces EBNA1 DNA binding at known viral and cellular sites by ChIP-qPCR. Discussion This study shows that patient-derived SLCLs provide a useful tool for interrogating the role of EBV + B cells in MS and suggests that a clinical trial testing the effect of EBNA1 inhibitors in MS may be warranted." @default.
• W4385718963 created "2023-08-11" @default.
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• W4385718963 date "2023-08-10" @default.
• W4385718963 modified "2023-09-27" @default.
• W4385718963 title "EBNA1 Inhibitors Block Proliferation of Spontaneous Lymphoblastoid Cell Lines From Patients With Multiple Sclerosis and Healthy Controls" @default.
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• W4385718963 doi "https://doi.org/10.1212/nxi.0000000000200149" @default.
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• W4385718963 hasPublicationYear "2023" @default.
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