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Sirtuin 2 knockdown inhibits cell proliferation and RAS/ERK signaling, and promotes cell apoptosis and cell cycle arrest in multiple myeloma

  • Authors:
    • Tianling Ding
    • Jie Hao
  • View Affiliations / Copyright

    Affiliations: Department of Hematology, Huashan Hospital, Fudan University, Shanghai 200040, P.R. China, Department of Hematology, Shanghai Jing'an District Beizhan Hospital, Shanghai 200070, P.R. China
    Copyright: © Ding et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 4.0].
  • Article Number: 760
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    Published online on: September 2, 2021
       https://doi.org/10.3892/mmr.2021.12400
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Abstract

The present study aimed to explore the regulatory role of sirtuin 2 (SIRT2) in malignant progression of multiple myeloma (MM) and the potential associated signaling pathways. In total, 30 patients with MM and 15 healthy bone marrow donors were enrolled in the current study and their bone marrow samples were collected to isolate the plasma cells. The expression levels of SIRT2 were detected in MM cell lines (KMS‑28BM, U266, RPMI‑8226 and NCI‑H929) and normal plasma cells (collected from healthy bone marrow donors as the control) via reverse transcription‑quantitative PCR (RT‑qPCR) and western blot analysis. SIRT2 knockdown was established by transfecting two MM cell lines (RPMI‑8226 and NCI‑H929 cells) with short hairpin RNA‑SIRT2 recombinant plasmid; the control group was transfected with a control recombinant plasmid. Subsequently, the effect of SIRT2 knockdown on MM cell proliferation, apoptosis, cell cycle progression and RAS/ERK signaling was investigated via Cell Counting Kit‑8, flow cytometry, RT‑qPCR and western blot assays, respectively. The mRNA and protein expression levels of SIRT2 were increased in U266 (P<0.001), KMS‑28BM (P<0.001), RPMI‑8226 (P<0.001) and NCI‑H929 (P<0.001) cells compared with those in the control cells. In NCI‑H929 and RPMI‑8226 cells, cell proliferation was decreased 48 h (P<0.05) and 72 h (P<0.05) after SIRT2 knockdown. Furthermore, the cell apoptotic rate was elevated 48 h after SIRT2 knockdown (P<0.01). In addition, the percentage of cells at the G0/G1 phase was increased (P<0.01), whereas the percentage of cells at the S phase was reduced (P<0.01) 48 h after SIRT2 knockdown. The expression levels of HRAS and phosphorylated‑ERK were also reduced 48 h after SIRT2 knockdown. In conclusion, SIRT2 was highly expressed in MM cell lines, and knockdown of SIRT2 inhibited MM cell proliferation, inactivated the RAS/ERK signaling pathway, and promoted cell apoptosis and cell cycle arrest.
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Copy and paste a formatted citation
Spandidos Publications style
Ding T and Hao J: Sirtuin 2 knockdown inhibits cell proliferation and RAS/ERK signaling, and promotes cell apoptosis and cell cycle arrest in multiple myeloma. Mol Med Rep 24: 760, 2021.
APA
Ding, T., & Hao, J. (2021). Sirtuin 2 knockdown inhibits cell proliferation and RAS/ERK signaling, and promotes cell apoptosis and cell cycle arrest in multiple myeloma. Molecular Medicine Reports, 24, 760. https://doi.org/10.3892/mmr.2021.12400
MLA
Ding, T., Hao, J."Sirtuin 2 knockdown inhibits cell proliferation and RAS/ERK signaling, and promotes cell apoptosis and cell cycle arrest in multiple myeloma". Molecular Medicine Reports 24.5 (2021): 760.
Chicago
Ding, T., Hao, J."Sirtuin 2 knockdown inhibits cell proliferation and RAS/ERK signaling, and promotes cell apoptosis and cell cycle arrest in multiple myeloma". Molecular Medicine Reports 24, no. 5 (2021): 760. https://doi.org/10.3892/mmr.2021.12400
Copy and paste a formatted citation
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Spandidos Publications style
Ding T and Hao J: Sirtuin 2 knockdown inhibits cell proliferation and RAS/ERK signaling, and promotes cell apoptosis and cell cycle arrest in multiple myeloma. Mol Med Rep 24: 760, 2021.
APA
Ding, T., & Hao, J. (2021). Sirtuin 2 knockdown inhibits cell proliferation and RAS/ERK signaling, and promotes cell apoptosis and cell cycle arrest in multiple myeloma. Molecular Medicine Reports, 24, 760. https://doi.org/10.3892/mmr.2021.12400
MLA
Ding, T., Hao, J."Sirtuin 2 knockdown inhibits cell proliferation and RAS/ERK signaling, and promotes cell apoptosis and cell cycle arrest in multiple myeloma". Molecular Medicine Reports 24.5 (2021): 760.
Chicago
Ding, T., Hao, J."Sirtuin 2 knockdown inhibits cell proliferation and RAS/ERK signaling, and promotes cell apoptosis and cell cycle arrest in multiple myeloma". Molecular Medicine Reports 24, no. 5 (2021): 760. https://doi.org/10.3892/mmr.2021.12400
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