全反式维甲酸诱导经典型霍奇金淋巴瘤B 细胞表型
作者:
作者单位:

(1. 滨州医学院附属医院,肿瘤研究中心,山东滨州 256600; 2. 滨州医学院附属医院,血液科,山东滨州 256600)

中图分类号:

R-33

基金项目:

山东省自然科学基金(ZR2016HB55);烟台市科技计划(2015ZH080);滨州医学院科研启动基金(BY2015KYQD28)


Restoration of the lost B-cell phenotype in classical Hodgkin lymphoma cells by all trans-retinoic acid treatment
Author:
Affiliation:

(1. Cancer Research Institute; 2. Department of Hematology, Binzhou Medical University Hospital, Binzhou 256600, China)

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    摘要:

    目的 探讨全反式维甲酸(ATRA)对经典型霍奇金淋巴瘤B 细胞表型的诱导作用?方法 构建含有G418 抗性的B 细胞特异性启动子(CD19,CD79a 和CD79b)表达载体,转染霍奇金淋巴瘤细胞并筛选稳定克隆?PCR 扩增启动子和荧光素酶序列验证其稳定整合,敲除ABF1 后检测外源B 细胞启动子活性的改变以验证其功能?检测不同浓度的ATRA 在不同时间点对外源B 细胞启动子活性的诱导作用,通过实时定量PCR 进一步证实ATRA 对B 细胞特异性基因转录水平的影响;检测ATRA 与去甲基化药物5-Aza 联合处理对B 细胞标记物表达的影响;通过流式细胞染色技术仪检测ATRA 对霍奇金淋巴瘤细胞表面标记物CD30 表达的影响?结果 ATRA 能够诱导人经典型霍奇金淋巴瘤B 细胞特异性标记物CD19?CD20?CD79a 和CD79b 的表达,与5-Aza 具有协同诱导作用,并下调细胞表面霍奇金特异性抗原CD30 的表达?结论 ATRA 能够诱导B 细胞表型缺失的经典型霍奇金淋巴瘤向B 细胞型淋巴瘤转化?

    Abstract:

    Objective To investigate the induction of B?cell specific phenotype in classical Hodgkin lymphoma (cHL) upon all?trans retinoic acid (ATRA) incubation. Methods To construct B-cell specific promoter ( CD19, CD79a, CD79b) driven reporter plasmid with NEO cassette to realize stable transfection and selection of cHL reporter cells. To verify the intact integration by amplification of the promoter and luciferase sequences, and to functionally validate the B-cell specific promoter by ABF1 interference and luciferase assay. Repoter cells were incubated with various doses of ATRA and luciferase activity was detected at 24, 48 and 72 hours. Reporter cells were treated alone or in combination with 5-Aza and ATRA followed by luciferase assay. Endogenous B-cell specific genes (CD19, CD20, CD79a and CD79b) transcription and expression levels were detected by real-time PCR and immunoblot, respectively. The expression level of CD30 antigen on Hodgkin lymphoma cell membrane upon ATRA was assessed by flow cytometry. Results ATRA treatment stimulated B-cell specific signature in cHL cells including CD19, CD79a and CD79b while down-regulated their CD30 expression. Conclusions ATRA induces B-cell phenotype deficient cHL cells to regain their B-cell transcriptional program while abolishes their Hodgkin-specific machinery.

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杜静,宫凯凯,杨丽娟,陈微微,罗丽卿.全反式维甲酸诱导经典型霍奇金淋巴瘤B 细胞表型[J].中国比较医学杂志,2018,28(2):46~52.

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  • 收稿日期:2017-09-20
  • 在线发布日期: 2018-03-14
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