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Modulation of microRNA expression in human T-cell development: targeting of NOTCH3 by miR-150.
- Source :
-
Blood . 6/30/2011, Vol. 117 Issue 26, p7053-7062. 10p. - Publication Year :
- 2011
-
Abstract
- Ontogenesis of T cells in the thymus is a complex process whose molecular control is poorly understood. The present study investigated microRNAs involved in human thymocyte differentiation by comparing the microRNA expression profiles of thymocytes at the double-positive, single-positive CD4+ and single-positive CD8+ maturation stages. Microarray analysis showed that each thymocyte population displays a distinct microRNA expression profile that reflects their developmental relationships. Moreover, analysis of small-RNA libraries generated from human unsorted and double-positive thymocytes and from mature peripheral CD4+ and CD8+ T lymphocytes, together with the microarray data, indicated a trend toward up-regulation of microRNA expression during T-cell maturation after the double-positive stage and revealed a group of microRNAs regulated during normal T-cell development, including miR-150, which is strongly up-regulated as maturation progresses. We showed that miR-150 targets NOTCH3, a member of the Notch receptor family that plays important roles both in T-cell differentiation and leukemogenesis. Forced expression of miR-150 reduces NOTCH3 levels in T-cell lines and has adverse effects on their proliferation and survival. Overall, these findings suggest that control of the Notch pathway through miR-150 may have an important impact on T-cell development and physiology. [ABSTRACT FROM AUTHOR]
- Subjects :
- *T-cell receptor genes
*ONTOGENY
*THYMUS
*CELL physiology
*CELL differentiation
Subjects
Details
- Language :
- English
- ISSN :
- 00064971
- Volume :
- 117
- Issue :
- 26
- Database :
- Academic Search Index
- Journal :
- Blood
- Publication Type :
- Academic Journal
- Accession number :
- 66801356
- Full Text :
- https://doi.org/10.1182/blood-2010-12-326629