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Knockdown of long non-coding RNA plasmacytoma variant translocation 1 inhibits cell proliferation while promotes cell apoptosis via regulating miR-486-mediated CDK4 and BCAS2 in multiple myeloma

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Abstract

Aims

This study aimed to investigate the effect of long non-coding RNA-plasmacytoma variant translocation 1 (lnc-Pvt1) knockdown on regulating cell proliferation and apoptosis, and to explore its molecular mechanism in multiple myeloma (MM).

Methods

Lnc-Pvt1 expression was detected in MM cell lines (NCI-H929, U-266, LP-1 and RPMI-8226 cell lines) and human normal plasma cells. In U-266 cells and LP-1 cells, control shRNA and lnc-Pvt1 shRNA plasmids were transferred. Rescue experiments were further performed by transfection of lnc-Pvt1 shRNA alone and lnc-Pvt1 shRNA and miR-486 shRNA plasmids. Cells proliferation, apoptosis, RNA expression, and protein expression were determined by cell counting kit-8, annexin V-FITC-propidium iodide, quantitative polymerase chain reaction, and Western blot assays, respectively.

Results

Lnc-Pvt1 expression was increased in MM cell lines (NCI-H929, U-266 and LP-1 cell lines) compared with human normal plasma cells. In U-266 cells, lnc-Pvt1 shRNA suppressed cell proliferation while enhanced cell apoptosis compared with control shRNA. Also, lnc-Pvt1 shRNA increased miR-486 expression compared with control shRNA. Further rescue experiment revealed that miR-486 shRNA did not change lnc-Pvt1 level, but increased CDK4 and BCAS2 expressions in lnc-Pvt1 knockdown–treated cells. In addition, miR-486 shRNA promoted cell proliferation while inhibited cell apoptosis in lnc-Pvt1 knockdown–treated cells. These results were further validated in LP-1 cells.

Conclusions

Lnc-Pvt1 knockdown inhibits cell proliferation and induces cell apoptosis through potentially regulating miR-486-mediated CDK4 and BCAS2 in MM.

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Author information

Author notes

  1. Man Zhang and Xuliang Zhao contributed equally to this work.

Authors and Affiliations

  1. Department of Laboratory, The 105th Hospital of PLA, 424# Changjiang West Road, Hefei, 230031, Anhui, China

    Man Zhang, Xuliang Zhao, Xinan Cai, Pengcheng Wang, Min Yu & Zhuojun Wei

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  1. Man Zhang
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  2. Xuliang Zhao
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  3. Xinan Cai
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  4. Pengcheng Wang
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  5. Min Yu
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  6. Zhuojun Wei
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Contributions

XC conceived and supervised the study. MZ and XZ performed the research, designed the research study, analyzed the data, and wrote the paper. PW and MY performed the research. ZW analyzed the data and revised the paper. All the authors read and approved the final manuscript.

Corresponding author

Correspondence to Xinan Cai.

Ethics declarations

The present study was approved by the Ethics Committee of our institution, and the written informed consent for the study use of BM sample was collected from the healthy donor before recruitment.

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The authors declare that they have no conflict of interest.

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Zhang, M., Zhao, X., Cai, X. et al. Knockdown of long non-coding RNA plasmacytoma variant translocation 1 inhibits cell proliferation while promotes cell apoptosis via regulating miR-486-mediated CDK4 and BCAS2 in multiple myeloma. Ir J Med Sci 189, 825–834 (2020). https://doi.org/10.1007/s11845-019-02165-7

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