4.5 Review

microRNAs function in CD8+T cell biology

Journal

JOURNAL OF LEUKOCYTE BIOLOGY
Volume 97, Issue 3, Pages 487-497

Publisher

FEDERATION AMER SOC EXP BIOL
DOI: 10.1189/jlb.1RU0814-369R

Keywords

development; activation; differentiation

Funding

  1. National Natural Science Foundation of China [30830089]

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During an immune response, CD8(+) T cells can differentiate into multiple types of effector and memory cells that are important components of immune surveillance. However, their dysregulation has been implicated in infection with viruses or intracellular bacteria and tumorigenesis. miRNAs have been identified as crucial regulators of gene expression, and they perform this function by repressing specific target genes at the post-transcriptional level. Most miRNAs expressed in a given cell type serve the function to impede broadly cell-type-inappropriate gene expression and potently deepen a pre-existing differentiation program. It is increasingly recognized that miRNAs directly modulate the concentration of many regulatory proteins that are required for the development of immune cells in the thymus and their responses in the periphery. This review outlines our current understanding of the function of miRNAs in CD8(+)T cell biology as it impacts expression of protein-coding genes in the context of proper development, infection, as well as oncogenesis. In addition, we conclude with a perspective on future challenges and the clinical relevance of miRNA biology.

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