Targeting Fusobacterium nucleatum through chemical modifications of host-derived transfer RNA fragments.
Targeting Fusobacterium nucleatum through chemical modifications of host-derived transfer RNA fragments.
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DOI:
10.1038/s41396-023-01398-w
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发表时间:
2023-06
期刊:
影响因子:
11
通讯作者:
Li, Jiahe
中科院分区:
文献类型:
--
作者:
Yang, Mengdi;Dong, Pu-Ting;Cen, Lujia;Shi, Wenyuan;He, Xuesong;Li, Jiahe
Host mucosal barriers possess an arsenal of defense molecules to maintain host-microbe homeostasis such as antimicrobial peptides and immunoglobulins. In addition to these well-established defense molecules, we recently reported small RNAs (sRNAs)-mediated interactions between human oral keratinocytes and Fusobacterium nucleatum (Fn), an oral pathobiont with increasing implications in extra-oral diseases. Specifically, upon Fn infection, oral keratinocytes released Fn-targeting tRNA-derived sRNAs (tsRNAs), an emerging class of noncoding sRNAs with gene regulatory functions. To explore potential antimicrobial activities of tsRNAs, we chemically modify the nucleotides of the Fn-targeting tsRNAs and demonstrate that the resultant tsRNA derivatives, termed MOD-tsRNAs, exhibit growth inhibitory effect against various Fn type strains and clinical tumor isolates without any delivery vehicle in the nanomolar concentration range. In contrast, the same MOD-tsRNAs do not inhibit other representative oral bacteria. Further mechanistic studies uncover the ribosome-targeting functions of MOD-tsRNAs in inhibiting Fn. Taken together, our work provides an engineering approach to targeting pathobionts through co-opting host-derived extracellular tsRNAs.
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