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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Zhang, Honghao Zhang, Xiaoying Kang, Kang Raj, J. Usha Gou, Deming Gao, Li Weng, Tingting Peng, Xiao Ramchandran, Ramaswamy Zhang, Lishu Wang, Yuna Liu, Lin |
| Description | Author Affiliation: Kang K ( College of Life Sciences, Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China.) |
| Abstract | Abnormal proliferation and phenotypic modulation of pulmonary artery smooth muscle cells (PASMC) contributes to the pathogenesis of numerous cardiovascular disorders, including pulmonary arterial hypertension (PAH). The nuclear factor of activated T cells (NFAT) signaling pathway is linked to PASMC proliferation and PAH. MicroRNAs (miRNAs) are small non-coding RNAs that function in diverse biological processes. To systemically identify the specific miRNAs that regulate the NFAT pathway, a human primary miRNA library was applied for cell-based high throughput screening with the NFAT luciferase reporter system. Eight miRNAs were found to modulate NFAT activity efficiently. Of them, miR-124 robustly inhibited NFAT reporter activity and decreased both the dephosphorylation and the nuclear translocation of NFAT. miR-124 also inhibited NFAT-dependent transcription of IL-2 in Jurkat T cells. miR-124 exerted its effects by targeting multiple genes, including a known component of the NFAT pathway, NFATc1, and two new regulators of NFAT signaling, CAMTA1 (calmodulin-binding transcription activator 1) and PTBP1 (polypyrimidine tract-binding protein 1). Physiologically, miR-124 was down-regulated by hypoxia in human PASMC, consistent with the activation of NFAT during this process. Down-regulation of miR-124 was also observed in 3-week hypoxia-treated mouse lungs. Furthermore, the overexpression of miR-124 not only inhibited human PASMC proliferation but also maintained its differentiated phenotype by repressing the NFAT pathway. Taken together, our data provide the first evidence that miR-124 acts as an inhibitor of the NFAT pathway. Down-regulation of miR-124 in hypoxia-treated PASMC and its antiproliferative and prodifferentiation effects imply a potential value for miR-124 in the treatment of PAH. |
| ISSN | 00219258 |
| e-ISSN | 1083351X |
| Journal | Journal of Biological Chemistry |
| Issue Number | 35 |
| Volume Number | 288 |
| Language | English |
| Publisher | American Society for Biochemistry and Molecular Biology (United States) |
| Publisher Date | 2013-08-30 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cell Proliferation Hypertension, Pulmonary Metabolism MicroRNAs Biosynthesis Muscle, Smooth, Vascular Myocytes, Smooth Muscle NFATC Transcription Factors Pulmonary Artery Transcriptional Activation Animals Cell Hypoxia Genetics Down-Regulation Pathology Jurkat Cells Mice Signal Transduction Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Biochemistry Molecular Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Biochemistry Molecular Biology |
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