Psoralen accelerates osteogenic differentiation of human bone marrow mesenchymal stem cells by activating the TGF‑β/Smad3 pathway

Huang,Yongquan; Liao,Liu; Su,Haitao; Chen,Xinlin; Jiang,Tao; Liu,Jun; Hou,Qiuke

doi:10.3892/etm.2021.10372

Psoralen accelerates osteogenic differentiation of human bone marrow mesenchymal stem cells by activating the TGF‑β/Smad3 pathway

Authors:
- Yongquan Huang
- Liu Liao
- Haitao Su
- Xinlin Chen
- Tao Jiang
- Jun Liu
- Qiuke Hou
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Affiliations: Department of Orthopaedics, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, P.R. China, Graduate School, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510405, P.R. China, Department of Preventive Medicine and Health Statistics, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510405, P.R. China, Department of Gastroenterology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510405, P.R. China
Published online on: July 1, 2021 https://doi.org/10.3892/etm.2021.10372
Article Number: 940
Copyright: © Huang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Psoralen, one of the active ingredients in Psoralea corylifolia, has been previously reported to regulate the osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs). A previous study revealed that psoralen can regulate the expression levels of microRNA‑488 and runt‑related transcription factor 2 (Runx2) to promote the osteogenic differentiation of BMSCs. However, the underlying signalling pathway in this process remains to be fully elucidated. BMSCs have also been confirmed to play a key role in the occurrence and development of osteoporosis, and are expected to be potential seed cells in the treatment of osteoporosis. In order to explore the potential signalling pathways of psoralen acting on BMSCs, in the present study, human BMSCs (hBMSCs) were treated with different concentrations of psoralen (0.1, 1, 10 and 100 µmol/l) and the TGF‑β receptor I (RI) inhibitor SB431542 (5 µmol/l) in vitro for 3, 7 or 14 days. Cell Counting Kit‑8 and MTT assays were used to measure cell proliferation and cell viability of hBMSCs following psoralen administration. Alkaline phosphatase (ALP) activity and alizarin red S staining were used to assess the osteogenic differentiation ability of hBMSCs. Reverse transcription‑quantitative PCR and western blotting were used to measure the expression of osteogenic differentiation‑related genes [bone morphogenetic protein 4 (BMP4), osteopontin (OPN), Runx2 and Osterix] and proteins associated with the TGF‑β/Smad3 pathway [TGF‑β1, TGF‑β RI, phosphorylated (p‑)Smad and Smad3]. Psoralen was found to increase the proliferation and viability of hBMSCs. Although different concentrations of psoralen enhanced ALP activity and the calcified nodule content in hBMSCs, the enhancement effects were more potent at lower concentrations (0.1, 1 and 10 µmol/l). The expression of BMP4, OPN, Osterix, Runx2, TGF‑β1, TGF‑β RI and p‑Smad3 was also promoted by psoralen at lower concentrations (0.1, 1 and 10 µmol/l). In addition, whilst SB431542 could inhibit calcium deposition and osteogenic differentiation‑related gene expression in hBMSCs, psoralen effectively reversed the inhibitory effects of SB431542. In conclusion, psoralen accelerates the osteogenic differentiation of hBMSCs by activating the TGF‑β/Smad3 pathway, which may be valuable for the future clinical treatment of osteoporosis.

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