Coordinated regulation of genes is key to determining cell fate. Although this is best understood for master regulator transcription factors, posttranscriptional regulation of mRNA stability and nuclear export can be equally effective at altering gene expression. Indeed, the heterogeneity of RNA-binding proteins and miRNAs suggests a deep complexity to posttranscriptional regulatory processes. In this issue, Wu and colleagues report a new mechanism for TGFβ-mediated immune suppression via regulation of mRNA-binding proteins in CD8+ T cells.See article by Wu et al., p. 1470.
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