Methionine metabolism controls the B cell EBV epigenome and viral latency.
Methionine metabolism controls the B cell EBV epigenome and viral latency.
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DOI:
10.1016/j.cmet.2022.08.008
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发表时间:
2022-09-06
期刊:
影响因子:
29
通讯作者:
Gewurz, Benjamin E.
中科院分区:
文献类型:
--
作者:
Guo, Rui;Liang, Jin Hua;Zhang, Yuchen;Lutchenkov, Michael;Li, Zhixuan;Wang, Yin;Trujillo-Alonso, Vicenta;Puri, Rishi;Giulino-Roth, Lisa;Gewurz, Benjamin E.
Epstein-Barr virus (EBV) subverts host epigenetic pathways to switch between viral latency programs, colonize the B cell compartment and reactivate. Within memory B cells, the reservoir for lifelong infection, EBV genomic DNA and histone methylation marks restrict gene expression. But, this epigenetic strategy also enables EBV-infected tumors, including Burkitt lymphomas to evade immune detection. Little is known about host cell metabolic pathways that support EBV epigenome landscapes. We therefore used amino acid restriction, metabolomic and CRISPR approaches to identify that an abundant methionine supply, and interconnecting methionine and folate cycles, maintain Burkitt EBV gene silencing. Methionine restriction, or methionine cycle perturbation, hypomethylated EBV genomes, de-repressed latent membrane protein and lytic gene expression. Methionine metabolism also shaped EBV latency gene regulation required for B cell immortalization. Dietary methionine restriction altered murine Burkitt xenograft metabolomes and de-repressed EBV immunogens in vivo. These results highlight epigenetic/immunometabolism crosstalk supporting the EBV B cell lifecycle and suggest therapeutic approaches. Guo et al. identify interconnecting methionine and folate cycles as critical for programing the double-stranded DNA Epstein-Barr virus epigenome in Burkitt lymphoma cells in support of immunoevasion. Perturbation of methionine or one-carbon metabolism hypomethylates the EBV genome and de-represses immunogenic viral latency and lytic cycle antigens, including in tumor xenografts.
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