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Erschienen in: Medical Oncology 8/2017

01.08.2017 | Short Communication

miR-181a-2 downregulates the E3 ubiquitin ligase CUL4A transcript and promotes cell proliferation

verfasst von: Venkateshwarlu Bandi, Sudhakar Baluchamy

Erschienen in: Medical Oncology | Ausgabe 8/2017

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Abstract

MiR-181a-2 plays a major role in cell proliferation both positively and negatively depending on tissue type by targeting several regulators 3′UTR regions. We have predicted several targets for miR-181a-2 through computational approaches and characterized one its interesting target, CUL4A, an E3 ubiquitin ligase. CUL4A regulates diverse functions in the cells including DNA repair, DNA replication, cell cycle, genomic stability through polyubiquitination of target proteins. Deregulation of both miR-181a-2 and CUL4A are reported in many cancerous cells, but the functional link between them is unknown. We show that miR-181a-5p binds to 3′UTR of CUL4A and regulates its transcripts levels in HEK293 cells through overexpression studies. In addition, by using MTT and Neutral red assays, we showed that miR-181a-2 overexpression increased the proliferation in HEK293 cells. Moreover, cell cycle analysis using flow cytometer revealed that an increase in S-phase cells upon the overexpression of miR-181a-2. Though several miRNAs are known to downregulate the CUL4A levels, here we show that miR-181a-2 also participates in the downregulation of CUL4A. Taken together, our data demonstrated that miR-181a-2 increases the cell proliferation in HEK293 cells possibly through the downregulation of CUL4A.
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Metadaten
Titel
miR-181a-2 downregulates the E3 ubiquitin ligase CUL4A transcript and promotes cell proliferation
verfasst von
Venkateshwarlu Bandi
Sudhakar Baluchamy
Publikationsdatum
01.08.2017
Verlag
Springer US
Erschienen in
Medical Oncology / Ausgabe 8/2017
Print ISSN: 1357-0560
Elektronische ISSN: 1559-131X
DOI
https://doi.org/10.1007/s12032-017-1006-2

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