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Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Mol+Cell 2014 ; 54 (1): 67-79 Nephropedia Template TP
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Alternative Capture of Noncoding RNAs or Protein-Coding Genes by Herpesviruses to Alter Host T-Cell Function #MMPMID24725595
Guo YE; Riley KJ; Iwasaki A; Steitz JA
Mol Cell 2014[Apr]; 54 (1): 67-79 PMID24725595show ga
In marmoset T cells transformed by Herpesvirus saimiri (HVS), a viral U-rich noncoding RNA, HSUR 1, specifically mediates degradation of host microRNA-27 (miR-27). High-throughput sequencing of RNA after crosslinking immunoprecipitation (HITS-CLIP) identified mRNAs targeted by miR-27 as enriched in the T-cell receptor (TCR) signaling pathway, including GRB2. Accordingly, transfection of miR-27 into human T cells attenuates TCR-induced activation of mitogen-activated protein kinases (MAPKs) and induction of CD69. MiR-27 also robustly regulates SEMA7A and IFN-?, key modulators and effectors of T-cell function. Knockdown or ectopic expression of HSUR 1 alters levels of these proteins in virally-transformed cells. Two other T-lymphotropic ?-herpesviruses, AlHV-1 and OvHV-2, do not produce a noncoding RNA to downregulate miR-27, but instead encode homologs of miR-27 target genes. Thus, oncogenic ?-herpesviruses have evolved diverse strategies to converge on common targets in host T cells.