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Title: | Pro-osteoporotic miR-320a impairs osteoblast function and induces oxidative stress |
Author: | Ugarte, Laura de Balcells Comas, Susana Nogués Solán, Xavier Grinberg Vaisman, Daniel Raúl Díez Pérez, Adolfo Garcia Giralt, Natalia |
Keywords: | Expressió gènica Estrès oxidatiu Osteoporosi Teixit ossi Gene expression Oxidative stress Osteoporosis Bone |
Issue Date: | 28-Nov-2018 |
Publisher: | Public Library of Science (PLoS) |
Abstract: | MicroRNAs (miRNAs) are important regulators of many cellular processes, including the differentiation and activity of osteoblasts, and therefore, of bone turnover. MiR-320a is overexpressed in osteoporotic bone tissue but its role in osteoblast function is unknown. In the present study, functional assays were performed with the aim to elucidate the mechanism of miR-320a action in osteoblastic cells. MiR-320a was either overexpressed or inhibited in human primary osteoblasts (hOB) and gene expression changes were evaluated through microarray analysis. In addition, the effect of miR-320a on cell proliferation, viability, and oxidative stress in hOB was evaluated. Finally, matrix mineralization and alkaline phosphatase activity were assessed in order to evaluate osteoblast functionality. Microarray results showed miR-320a regulation of a number of key osteoblast genes and of genes involved in oxidative stress. Regulation of osteoblast differentiation and ossification appeared as the best significant biological processes (PANTHER P value=3.74E-05; and P value=3.06E-04, respectively). The other enriched pathway was that of the cellular response to cadmium and zinc ions, mostly by the overexpression of metallothioneins. In hOBs, overexpression of miR-320a increased cell proliferation and oxidative stress levels whereas mineralization capacity was reduced. In conclusion, overexpression of miR-320a increased stress oxidation levels and was associated with reduced osteoblast differentiation and functionality, which could trigger an osteoporotic phenotype. |
Note: | Reproducció del document publicat a: https://doi.org/10.1371/journal.pone.0208131 |
It is part of: | PLoS One, 2018, vol. 13, num. 11, p. e0208131 |
URI: | http://hdl.handle.net/2445/130348 |
Related resource: | https://doi.org/10.1371/journal.pone.0208131 |
ISSN: | 1932-6203 |
Appears in Collections: | Articles publicats en revistes (Genètica, Microbiologia i Estadística) Articles publicats en revistes (Institut de Biomedicina (IBUB)) |
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