医学分子生物学杂志 ›› 2025, Vol. 22 ›› Issue (4): 332-338.doi: 10.3870/j.issn.1672-8009.2025.04.005

• 论著 • 上一篇    下一篇

c-Myc / miR-27b-3p 上调 Bcl-2 促进多发性骨髓瘤存活的分子机制研究 #br#

  

  1. 新疆医科大学第五附属医院风湿免疫血液科 乌鲁木齐市, 830000
  • 出版日期:2025-07-31 发布日期:2025-07-18
  • 基金资助:
    新疆维吾尔自治区自然科学基金 (No. 2020D01C327)

c-Myc / miR-27b-3p Promote Multiple Myeloma Cell Survival by Upregulating Bcl-2 #br#

  1. Department of Rheumatology, Immunology and Hematology, the Fifth Affiliated Hospital of Xinjiang Medical University, Urumqi, 830000, China
  • Online:2025-07-31 Published:2025-07-18

摘要: 目的 探索 c-Myc / miR-27b-3p / Bcl-2 轴促进多发性骨髓瘤 (multiple myeloma, MM) 存活的分子机制方法 以骨髓间充质干细胞 ( bone marrow stem cells, BMSCs) 为对照组, qPCR 法测定人 MM 细胞系 RPMI8226 U266 细胞中 MM 相关基因和 microRNAs (miRNAs) 的相对表达水平。 TargetScan 和双荧光素酶报告基因方法分别预测和验证 miR-27b-3p Bcl-2 的直接序列互作关系通过分离 14 名新疆医科大学第五附属医院临床确诊为 MM 的患者的原代 MM 细胞, qPCR 法测定其中 c-Myc、 Bcl-2 mRNA miR- 27b-3p 的相对表达水平; Pearson 相关性分析 3 者的相关性构建腺病毒过表达 c-Myc (c-Myc OE) Bcl-2 (Bcl-2 OE) 载体以及 miR-27b-3p 抑制物 (miR-27b-3p inhibitor) 载体并转染 BMSCs。 蛋白质印迹测定 BMSCs p-STAT3、 STAT3、 p-JAK2 JAK2 的表达水平结果 BMSCs 细胞相比, c-Myc Bcl-2 mRNA RPMI8226 U266 细胞中均显著上调 (P< 0. 01), miR-27b-3p RPMI8226 U266 细胞中均显著下调 (P< 0. 01)。 荧光素酶报告基因结果显示 miR-27b-3p 直接靶向 Bcl-2 3′-UTR 区域。 qPCR Pearson 相关性分析结果显示, c-Myc mRNA miR-27b-3p RNA 相对表达水平、 miR-27b-3p RNA Bcl-2 mRNA 相对表达水平呈线性负相关 (P< 0. 01); c-Myc mRNA Bcl-2 mRNA 相对表达水平呈线性正相关 ( P< 0. 01)。 BMSCs 组相比, BMSCs + c-Myc OE 、 BMSCs + miR-27b-3p inhibitor 、 BMSCs + Bcl-2 OE 组细胞中 pSTAT3、 STAT3、 p-JAK2、 JAK2 的表达水平均升高 ( P < 0. 05)。 结论 MM 通过上调 c-Myc 的表达抑制miR-27b-3p 从而激活 Bcl-2, 促进 MM 细胞存活

关键词: 多发性骨髓瘤, c-Myc, miR-27b-3p, Bcl-2, JAK2 / STAT3, 细胞存活

Abstract: Objective To explore the molecular mechanisms of c-Myc / miR-27b-3p / Bcl-2 axison promoting multiple myeloma ( MM) cell survival. Methods The relative expression levels ofMM-related genes and microRNAs (miRNAs) were measured in human MM cell lines RPMI8226 and U266 cells by using qPCR analysis. TargetScan and dual-luciferase gene reporter assay were used to predict and verify the targeting relationship between miR-27b-3p and Bcl-2, respectively. The primary MM cells were isolated from 14 patients with MM recruited from the Fifth Affiliated Hospital of Xinjiang Medical University. The mRNA expression levels of c-Myc, Bcl-2, and the expression level of miR-27b-3p in primary MM cells were detected by qPCR. Pearson correlation analysis was used to analyze the relationship among their expression levels. Adenovirus vectors with c-Myc or Bcl-2 overexpression ( Bcl-2 OE, c-Myc OE), or miR-27b-3p inhibitor ( miR-27b-3p inhibitor) were constructed and transfected into the BMSCs. The expression levels of p-STAT3, STAT3,p-JAK2, and JAK2 in BMSCs were detected by Western blotting. Results Compared with those in the BMSCs, the mRNA expression levels of c-Myc and Bcl-2 were upregulated in the RPMI8226cells and the U266 cells (P < 0. 01), and miR-27b-3p was downregulated in the RPMI8226 cells and the U266 cells (P< 0. 01). Dual-luciferase gene reporter assay results showed that miR-27b-3p was directly targeted to the Bcl-2 3′-UTR. qPCR and Pearson correlation analysis showed that therelative expression levels of c-Myc mRNA and miR-27b-3p, miR-27b-3p and Bcl-2 mRNA werelinearly and negatively correlated (P< 0. 01), while the relative expression levels of c-Myc mRNA and Bcl-2 mRNA were linearly and positively correlated ( P < 0. 01). Compared with those in theBMSCs group, the expression levels of p-STAT3, STAT3, p-JAK2, and JAK2 in the BMSCs + cMyc OE group, the BMSCs + miR-27b-3p inhibitor group, and the BMSCs + Bcl-2 OE group wereall increased (P< 0. 05). Conclusion c-Myc upregulation and miR-27b-3p inhibition activated theBcl-2 to promote cell survival in MM.

Key words: multiple myeloma, c-Myc, miR-27b-3p, Bcl-2, JAK2 / STAT3, cell survival

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