A threshold level of NFATc1 activity facilitates thymocyte differentiation and opposes notch-driven leukaemia development
2016 | journal article. A publication with affiliation to the University of Göttingen.
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A threshold level of NFATc1 activity facilitates thymocyte differentiation and opposes notch-driven leukaemia development
Klein-Hessling, S.; Rudolf, R.; Muhammad, K.; Knobeloch, K.-P.; Maqbool, M. A.; Cauchy, P. & Andrau, J.-C. et al. (2016)
Nature Communications, 7 art. 11841. DOI: https://doi.org/10.1038/ncomms11841
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Details
- Authors
- Klein-Hessling, Stefan; Rudolf, Ronald; Muhammad, Khalid; Knobeloch, Klaus-Peter; Maqbool, Muhammad Ahmad; Cauchy, Pierre; Andrau, Jean-Christophe; Avots, Andris; Talora, Claudio; Ellenrieder, Volker; Screpanti, Isabella; Serfling, Edgar; Patra, Amiya Kumar
- Abstract
- NFATc1 plays a critical role in double-negative thymocyte survival and differentiation. However, the signals that regulate Nfatc1 expression are incompletely characterized. Here we show a developmental stage-specific differential expression pattern of Nfatc1 driven by the distal (P1) or proximal (P2) promoters in thymocytes. Whereas, preTCR-negative thymocytes exhibit only P2 promoter-derived Nfatc1 beta expression, preTCR-positive thymocytes express both Nfatc1 beta and P1 promoter-derived Nfatc1 alpha transcripts. Inducing NFATc1 alpha activity from P1 promoter in preTCR-negative thymocytes, in addition to the NFATc1 beta from P2 promoter impairs thymocyte development resulting in severe T-cell lymphopenia. In addition, we show that NFATc1 activity suppresses the B-lineage potential of immature thymocytes, and consolidates their differentiation to T cells. Further, in the pTCR-positive DN3 cells, a threshold level of NFATc1 activity is vital in facilitating T-cell differentiation and to prevent Notch3-induced T-acute lymphoblastic leukaemia. Altogether, our results show NFATc1 activity is crucial in determining the T-cell fate of thymocytes.
- Issue Date
- 2016
- Status
- published
- Publisher
- Nature Publishing Group
- Journal
- Nature Communications
- ISSN
- 2041-1723