Mesenchymal Stem Cells Inhibit the Effects of Dexamethasone in Multiple Myeloma Cells

Author:

Deng Mingyang1,Yuan Huan1,Peng Hongling1,Liu Sufang1,Xiao Xiang1,Wang Zhihua1,Zhang Guangsen1,Xiao Han2ORCID

Affiliation:

1. Department of Hematology, The Second Xiangya Hospital, Central South University, Changsha 410011, China

2. Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha 410011, China

Abstract

Mesenchymal stem cells (MSCs) participate in the occurrence and development of multiple myeloma. This study is aimed at exploring whether the presence of MSCs affects dexamethasone’s antitumor effects against multiple myeloma. Multiple myeloma cells (OPM-2 and RPMI8226 cells) were cocultured with MSCs with or without dexamethasone. Cell viability was determined by using cell number count, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay, and colony formation assay, respectively. Cell cycle distribution and cell apoptosis were evaluated by using flow cytometry. The mRNA and protein expressions of target genes were checked by using qRT-PCR and western blotting, respectively. It was found that cell viability of multiple myeloma cells increased in the presence of MSCs. Besides, the presence of MSCs suppressed cell apoptosis induced by dexamethasone via the regulation of BCL-2 (B cell lymphoma 2). The presence of MSCs also affected the effects of dexamethasone on cell cycle distribution. Similarly, LINC00461 overexpression suppressed the inhibition of cell proliferation, suppressed the induction of cell apoptosis, and affected the effects on cell cycle distribution induced by dexamethasone insult. However, LINC00461 knockdown enhanced the inhibitory effects on cell proliferation and the induction of cell apoptosis induced by dexamethasone. In summary, MSCs inhibited the effects of dexamethasone on multiple myeloma and its regulatory effects were associated with LINC00461.

Funder

Natural Science Foundation of Hunan Province

Publisher

Hindawi Limited

Subject

Cell Biology,Molecular Biology

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