Chinese Journal of Tissue Engineering Research ›› 2024, Vol. 28 ›› Issue (1): 12-19.doi: 10.12307/2023.901

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Effect of lentiviral silencing of Piezo1 on osteogenic differentiation and TAZ expression in human bone marrow mesenchymal stem cells

Wei Yurou1, 2, Tian Jiaqing1, 2, He Xianshun1, 2, Zhan Zhiwei1, 2, Wei Tengfei1, 2, Lin Tianye2, 3, He Wei2, 3, Wei Qiushi2, 3   

  1. 1Third Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou 510378, Guangdong Province, China; 2Guangdong Research Institute for Orthopedics and Traumatology of Chinese Medicine, Guangzhou 510378, Guangdong Province, China; 3Joint Center, Third Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510378, Guangdong Province, China
  • Received:2022-11-18 Accepted:2023-01-29 Online:2024-01-08 Published:2023-06-28
  • Contact: Wei Qiushi, MD, Doctoral supervisor, Associate chief physician, Guangdong Research Institute for Orthopedics and Traumatology of Chinese Medicine, Guangzhou 510378, Guangdong Province, China; Joint Center, Third Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510378, Guangdong Province, China
  • About author:Wei Yurou, Master candidate, Third Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou 510378, Guangdong Province, China; Guangdong Research Institute for Orthopedics and Traumatology of Chinese Medicine, Guangzhou 510378, Guangdong Province, China
  • Supported by:
    National Natural Science Foundation of China (General Program), No. 81873327 (to HW); National Natural Science Foundation of China (General Program), No. 82274544 (to WQS); Young Science Foundation of the National Natural Science Foundation of China, No. 82004392 (to HMC); General University Key Fields Special Project of Guangdong Provincial Department of Education, No. 2021ZDZX2005 (to WQS); Major Project of "Double First-Class" and High-Level University Discipline Collaborative Innovation Team of Guangzhou University of Chinese Medicine, No. 2021XK05 (to HW); The Cultivation Project of "Double First-Class" and High-Level University Discipline Collaborative Innovation Team of Guangzhou University of Chinese Medicine, No. 2021XK41 (to WQS); Special Topic of Agricultural and Social Development Science and Technology Project of the Key Research and Development Plan of Guangzhou Science and Technology, No. 202206010184 (to WQS); Scientific Research Project of Guangdong Provincial Bureau of Traditional Chinese Medicine, No. 20221199 (to WQS); Key Open Project of Guangdong Academy of Traditional Chinese Medicine Osteopathy, No. GYH202101-01 (to HW); Key Open Project of Guangdong Academy of Traditional Chinese Medicine Osteopathy, No. GYH202101-04 (to WQS); The First Batch of Joint Innovation Research Project of Guangdong New Huangpu Joint Innovation Institute of Traditional Chinese Medicine in 2022, No. 2022IR012 (to WQS); the "Unveiling and Commanding" Project of Bijie Municipal Bureau of Science and Technology in 2022, No. [2022]1 (to WQS) 

Abstract: BACKGROUND: Piezo1, a mechanosensitive protein, is tightly connected to osteogenic differentiation, and it has been demonstrated that TAZ has a role in regulating osteogenic differentiation. It is unclear whether TAZ participates in the regulation of osteogenic differentiation of human bone marrow mesenchymal stem cells by Piezo1, so it is crucial to investigate its unique mechanism to prevent osteonecrosis of the femoral head.
OBJECTIVE: To elucidate what function Piezo1 plays in osteogenic differentiation and TAZ expression in human bone marrow mesenchymal stem cells. 
METHODS: The siRNA targeting Piezo1 was constructed and transfected into 293T cells. The silencing efficiency was detected by RT-qPCR. The selected Piezo1-Home-2337 was packaged according to the silencing efficiency, and its optimal multiplicity of infection value was assayed by immunofluorescence staining. The packaged Piezo1 silencing recombinant lentivirus was transfected into human bone marrow mesenchymal stem cells, and its silencing effect was detected by RT-qPCR and western blot assay. Alizarin red staining, alkaline phosphatase activity analysis, immunofluorescence staining, RT-qPCR and western blot assay were utilized to analyze the effect of silencing Piezo1 on the osteogenic differentiation of human bone marrow mesenchymal stem cells.
RESULTS AND CONCLUSION: (1) The mRNA and protein levels of Piezo1 in human bone marrow mesenchymal stem cells transfected by si-Piezo1 were decreased significantly, with a statistically significant difference compared with normal and negative control groups. (2) The alkaline phosphatase activity in the si-Piezo1 group was much lower and the calcium deposition in the si-Piezo1 group was significantly reduced compared with the negative control group. (3) The mRNA levels of osteogenesis-related genes including Runt-related transcription factor 2 (Runx2), osteopontin (OPN), distal-less homeobox 5 (DLX5), osteocalcin, β-catenin and Tafazzin (TAZ) in the si-Piezo1 group were significantly decreased compared with the negative control group. Afterward, the expression levels of TAZ and β-catenin protein in the si-Piezo1 group were down-regulated significantly compared with the negative control group, whereas the expression levels of p-TAZ and p-β-catenin protein in the si-Piezo1 group had the opposite condition. (4) The results of immunofluorescence staining showed that the expression of TAZ and β-catenin in human bone marrow mesenchymal stem cells in the si-Piezo1 group was less compared with the negative control group. (5) These findings indicate that Piezo1 can promote the osteogenic differentiation of human bone marrow mesenchymal stem cells. The osteogenic ability of human bone marrow mesenchymal stem cells is significantly reduced after silencing Piezo1, and the expression of TAZ is also reduced.

Key words: osteonecrosis of the femoral head, human bone marrow mesenchymal stem cell, Piezo1, TAZ, osteogenic differentiation

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