吉林大学学报(医学版) ›› 2022, Vol. 48 ›› Issue (1): 172-179.doi: 10.13481/j.1671-587X.20220121

• 临床研究 • 上一篇    下一篇

SOCS3在弥漫大B细胞淋巴瘤患者外周血单个核细胞中的表达及其对OCI-LY7细胞自噬和凋亡的影响

孙文雄,李蒲()   

  1. 南昌大学第一附属医院国家药物临床试验机构血液科,江西 南昌 330006
  • 收稿日期:2021-02-21 出版日期:2022-01-28 发布日期:2022-01-17
  • 通讯作者: 李蒲 E-mail:13970998685@163.com
  • 作者简介:孙文雄(1987-),男,江西省南昌市人,助理研究员,主要从事Ⅰ期药物临床研究和淋巴系统恶性肿瘤临床诊疗方面的研究。
  • 基金资助:
    江西省教育厅科学技术研究项目(赣教技字(GJJ14183)

Expression of SOCS3 in peripheral blood mononuclear cells of patients with diffuse large B-cell lymphoma and its effect on autophagy and apoptosis of OCI-LY7 cells

Wenxiong SUN,Pu LI()   

  1. Department of Hematology,National Drug Clinical Trial Institution,First Affiliated Hospital,Nanchang University,Nanchang 330006,China
  • Received:2021-02-21 Online:2022-01-28 Published:2022-01-17
  • Contact: Pu LI E-mail:13970998685@163.com

摘要: 目的

探讨信号传导抑制因子3(SOCS3)在弥漫大B细胞淋巴瘤(DLBCL)患者外周血单个核细胞中的表达及其对OCI-LY1-细胞自噬和凋亡的影响,并阐明其分子机制。

方法

收集并提取健康志愿者(对照组,50名)和DLBCL患者(DLBCL组,100例)外周血单个核细胞,同时培养人B淋巴细胞和人DLBCL 细胞(OCI-LY7细胞),实时荧光定量PCR(RT-qPCR)法检测2组受试者外周血单个核细胞、B淋巴细胞和OCI-LY7细胞中SOCS3 mRNA表达水平。将OCI-LY7细胞分为pcDNA3.1-NC组和pcDNA3.1-SOCS3组,分别转染pcDNA3.1-NC和pcDNA3.1- SOCS3,RT-qPCR法检测2组细胞中SOCS3 mRNA表达水平,5-溴-2-脱氧尿嘧啶(EDU)实验检测2组细胞中EDU阳性细胞率,细胞免疫荧光染色法检测2组细胞中微管相关蛋白1轻链3(LC3)阳性细胞率,流式细胞术检测2组细胞凋亡率和不同细胞周期细胞百分率,Western bloting法检测2组细胞中SOCS3、磷酸化Janus激酶2(p-JAK2)及磷酸化信号转导和转录激活因子3(p-STAT3)蛋白表达水平,计算微管相关蛋白1轻链3 Ⅱ/Ⅰ(LC3Ⅱ/LC3Ⅰ)比值。

结果

与对照组比较, DLBCL组患者外周血单个核细胞中SOCS3 mRNA表达水平明显降低(P<0.01);与B淋巴细胞比较,OCI-LY7细胞中SOCS3 mRNA表达水平明显降低(P<0.01)。与pcDNA3.1-NC组比较,pcDNA3.1-SOCS3组细胞中SOCS3 mRNA和蛋白表达水平明显升高(P<0.01),EDU阳性细胞率明显降低(P<0.01),LC3 Ⅱ/LC3 Ⅰ和LC3阳性细胞率明显降低(P<0.01),细胞凋亡率明显升高(P<0.01),G0/G1期细胞百分率明显升高(P<0.01),S期细胞百分率明显降低(P<0.01),p-JAK2和p-STAT3蛋白表达水平明显降低(P<0.01)。

结论

SOCS3在DLBCL患者外周血单个核细胞和OCI-LY7细胞中呈低表达,过表达SOCS3可抑制OCI-LY7细胞增殖和自噬,增加细胞凋亡率,其机制可能与抑制JAK2/STAT3信号通路有关。

关键词: 信号传导抑制因子3, 弥漫大B细胞淋巴瘤, 细胞自噬, 细胞凋亡, 磷酸化JAK激酶2, 磷酸化信号转导和转录激活因子3

Abstract: Objective

To explore the expression of suppressor of cytokine signaling 3 (SOCS3) in the peripheral blood mononuclear cells of the patients with diffuse large B-cell lymphoma (DLBCL) and its effect on the autophagy and apoptosis of OCI-LY1-cells, and to clarify its molecular mechanism.

Methods

The peripheral blood mononuclear cells of healthy volunteers (control group, 50 cases) and DLBCL patients (DLBCL group, 100 cases) were collected and extracted,and the human B lymphocytes and OCI-LY7 cells were cultured at the same time. The expression levels of SOCS3 mRNA in peripheral blood mononuclear cells, B lymphocytes,and OCI-LY7 cells of the subjects in two groups were detected by real-time fluorescence quantitative PCR (RT-qPCR) method. The OCI-LY7 cells were divided into pcDNA3.1-NC group and pcDNA3.1-SOCS3 group, and the cells were transfected with pcDNA3.1-NC and PCDNA3.1-SOCS3, respectively.The expression levels of SOCS3 mRNA in the cells in two groups were detected by RT-qPCR method;the EDU positive cell rates of the cells in two groups were detected by EDU experiment, and the microtubule-associated protein 1 light chain 3(LC3) positive cell rates in the cells in two groups were detected by cell immunofluorescence staining; flow cytometry was used to detect the apoptotic rates and the percentages of cells in different cell cycles in two groups,and Western blotting method was used to detect the expression levels of SOCS3, phosphorylated Janus kinase 2(p-JAK2) and phosphorylated signal transducer and activator of transcription 3 (p-STAT3) proteins in the cells in two groups.The ratios of LC3Ⅱ/LC3Ⅰ was calculated.

Results

Compared with control group, the expression level of SOCS3 mRNA in peripheral blood mononuclear cells of the patients in DLBCL group was decreased (P<0.01); compared with B lymphocyte group, the expression level of SOCS3 mRNA in the OCI-LY7 cells was decreased (P<0.01). Compared with pcDNA3.1-NC group,the expression levels of SOCS3 mRNA and protein in the cells in pcDNA3.1-SOCS3 group were significantly increased(P<0.01), the EDU positive cell rate of OCI-LY7 cells was significantly decreased (P<0.01), the ratio of LC3 Ⅱ/LC3Ⅰ and the number of LC3 positive cells were decreased significantly(P<0.01),the apoptotic rate of OCI-LY7 cells was significantly increased (P<0.01), the percentage of cells in G0/G1 phase was significantly increased (P<0.01), the percentage of cells in S phase was significantly reduced (P<0.01),and the expression levels of p-JAK2 and p-STAT3 proteins were significantly reduced (P<0.01).

Conclusion

SOCS3 is lowly expressed in the peripheral blood mononuclear cells and OCI-LY7 cells of the patients with DLBCL. Overexpression of SOCS3 can inhibit the proliferation and autophagy of OCI-LY7 cells, and enhance the apoptotic rate, and its mechanism may be related to inhibiting the JAK2/STAT3 signaling pathway.

Key words: Suppressors of cytokine signaling 3, Diffuse large B-cell lymphoma, Autophagy, Apoptosis, Phosphorylated Janus kinase 2, Phosphorylated signal transducer and activator of transcription 3

中图分类号: 

  • R733