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Yu, Qiujing; Carbone, Christopher J.; Katlinskaya, Yuliya V.; Zheng, Hui; Zheng, Ke; Luo, Mengcheng; Wang, P. Jeremy; Greenberg, Roger A.; Fuchs, Serge Y.
Journal of biological chemistry/The Journal of biological chemistry, 04/2015, Letnik: 290, Številka: 16Journal Article
Type I interferons (IFN) including IFNα and IFNβ are critical for the cellular defense against viruses. Here we report that increased levels of IFNβ were found in testes from mice deficient in MOV10L1, a germ cell-specific RNA helicase that plays a key role in limiting the propagation of retrotransposons including Long Interspersed Element-1 (LINE-1). Additional experiments revealed that activation of LINE-1 retrotransposons increases the expression of IFNβ and of IFN-stimulated genes. Conversely, pretreatment of cells with IFN suppressed the replication of LINE-1. Furthermore, the efficacy of LINE-1 replication was increased in isogenic cell lines harboring inactivating mutations in diverse elements of the IFN signaling pathway. Knockdown of the IFN receptor chain IFNAR1 also stimulated LINE-1 propagation in vitro. Finally, a greater accumulation of LINE-1 was found in mice that lack IFNAR1 compared with wild type mice. We propose that LINE-1-induced IFN plays an important role in restricting LINE-1 propagation and discuss the putative role of IFN in preserving the genome stability. Background: Type 1 interferons (IFN1) mediate defense against viruses but their role in regulating retrotransposon activities is unknown. Results: LINE-1 retrotransposon induces IFN1, which in turn inhibits LINE-1 retrotransposition. Conclusion: IFN1 regulate activities and propagation of LINE-1. Significance: Given that retrotransposons alter the genome, IFN1 play a role in maintenance of genomic integrity.
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in: SICRIS
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