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microRNA miR-17-92 cluster is highly expressed in epidermal Langerhans cells but not required for its development

Genes & Immunity volume 15, pages 57–61 (2014)Cite this article

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Abstract

Langerhans cells (LCs) are bone marrow-derived immature skin-residential dendritic cells (DCs) with a life cycle distinct from that of other types of DCs. The mechanisms involved in LC homeostasis and immunological functions are still not clear. MicroRNAs (miRNAs) are a class of short noncoding RNAs that regulate gene expression through either translational repression or mRNA degradation. A recent study showed that specific deletion of total miRNAs in DCs affects the homeostasis and function of only LCs, but not of other types of DCs. The roles of specific individual miRNA in LC development are still lacking. The miRNA miR-17-92 class, encoding miR-17, miR-18, miR-19a, miR-19b, miR-20 and miR-92, plays a very important role in B- and T-cell development and function. Here, we first report that epidermal LCs highly express the miR-17-92 class compared with spleen naive T cells. To further characterize the role of miR-17-92 in LC development, we generated LC-specific miR-17-92 knockout and knock-in mice. Interestingly, LC-specific gain- and loss-of-function of miR-17-92 cluster did not significantly change LC homeostasis, maturation ability, antigen capture and migration to draining lymph nodes. Thus, the miR-17-92 cluster may be functionally redundant and not critically required for LC development and function.

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Acknowledgements

We thank all members from our laboratories for their advice and encouragement. This work was supported by grants from the National Institutes of Health Grant 1R21AR059976 and Henry Ford Health System Start-up Grant for the Immunology Program (T71016 and T71017).

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Authors and Affiliations

  1. Henry Ford Immunology Program, Henry Ford Hospital, Detroit, MI, USA

    L Zhou, R-Q Qi, M Liu, Y-P Xu, G Li, M Weiland & Q-S Mi

  2. Department of Dermatology, Henry Ford Hospital, Detroit, MI, USA

    L Zhou, R-Q Qi, M Liu, Y-P Xu, G Li, M Weiland & Q-S Mi

  3. Department of Internal Medicine, Henry Ford Hospital, Detroit, MI, USA

    L Zhou & Q-S Mi

  4. Department of Dermatology and Center for Immunology, University of Minnesota, Minneapolis, MN, USA

    D H Kaplan

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  1. L Zhou
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Correspondence to L Zhou or Q-S Mi.

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Zhou, L., Qi, RQ., Liu, M. et al. microRNA miR-17-92 cluster is highly expressed in epidermal Langerhans cells but not required for its development. Genes Immun 15, 57–61 (2014). https://doi.org/10.1038/gene.2013.61

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