Bioinformatics analysis on the differentiation of bone mesenchymal stem cells into osteoblasts and adipocytes

Xu,Xiaoyuan; Jiang,He; Li,Xingnuan; Wu,Ping; Liu,Jianyun; Wang,Tao; Zhou,Xiaoou; Xiong,Jianjun; Li,Weidong

doi:10.3892/mmr.2017.6178

Bioinformatics analysis on the differentiation of bone mesenchymal stem cells into osteoblasts and adipocytes

Authors:
- Xiaoyuan Xu
- He Jiang
- Xingnuan Li
- Ping Wu
- Jianyun Liu
- Tao Wang
- Xiaoou Zhou
- Jianjun Xiong
- Weidong Li
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Affiliations: Key Laboratory of System Bio‑Medicine of Jiangxi Province, Jiujiang University, Jiujiang, Jiangxi 332000, P.R. China
Published online on: February 8, 2017 https://doi.org/10.3892/mmr.2017.6178
Pages: 1571-1576
Copyright: © Xu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

The present study aimed to screen several differentially expressed genes (DEGs) and differentially expressed microRNAs (miRNAs) for two types of mesenchymal stem cell (MSC) differentiation. Bone morphogenetic protein 6 (BMP‑6) and dexamethasone were used to induce MSCs towards osteoblastic differentiation or adipocytic differentiation. The t‑test in the Bioconductor bioinformatics software tool was used to screen DEGs and differentially expressed miRNAs in the two samples. Subsequent gene ontology (GO) and pathway analyses on the DEGs were performed using the GO and Kyoto Encyclopedia of Genes and Genomes databases, respectively; potential target genes for the screened miRNAs were predicted using the TargetScan database. In addition, an interaction network between the DEGs and miRNAs was constructed. Numerous DEGs and miRNAs were screened during osteoblastic and adipocytic differentiation of MSCs. Important pathways, such as glutathione metabolism, pathogenic Escherichia coli infection and Parkinson's disease, and GO terms, including cytoskeletal protein binding and phospholipase inhibitor activity, were enriched in the screened DEGs from MSCs undergoing osteogenic differentiation and adipocytic differentiation. miRNAs, including miRNA (miR)‑382 and miR‑203, and DEGs, including neuronal growth regulator 1 (NEGR1), phosphatidic acid phosphatase 2B (PPAP2B), platelet‑derived growth factor receptor alpha (PDGFRA), interleukin 6 signal transducer (IL6ST) and sortilin 1 (SORT1), were demonstrated to be involved in osteoblastic differentiation. In addition, the downregulated miRNAs (including miR‑495, miR‑376a and miR‑543), the upregulated miR‑106a, the upregulated DEGs, including enabled homolog (ENAH), polypeptide N‑acetylgalactosaminyltransferase 1 and acyl‑CoA synthetase long‑chain family member 1, and the downregulated repulsive guidance molecule family member B and semaphorin SEMA7A were demonstrated to be involved in adipocytic differentiation. The results of the present study suggested that miRNAs (miR‑203 and miR‑382) and DEGs (NEGR1, PPAP2B, PDGFRA, IL6ST and SORT1) may serve pivotal functions in the osteoblastic differentiation of MSCs, whereas miR‑495, which is also involved in osteoblast differentiation and had four targets, including NEGR1, miR‑376a, miR‑543 and ENAH may have crucial roles in adipocytic differentiation of MSCs.

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