Paczkowska Julia, Janiszewska Joanna, Ustaszewski Adam, Bein Julia, Skalski Marcin, Dzikiewicz-Krawczyk Agnieszka, Rozwadowska Natalia, Hansmann Martin-Leo, Hartmann Sylvia, Giefing Maciej
Institute of Human Genetics, Polish Academy of Sciences, 60-479 Poznan, Poland.
Dr. Senckenberg Institute of Pathology, Goethe University Frankfurt, D-60590 Frankfurt, Germany.
Cancers (Basel). 2021 Jun 23;13(13):3131. doi: 10.3390/cancers13133131.
A hallmark of classical Hodgkin lymphoma (cHL) is the attenuation of B-cell transcription factors leading to global transcriptional reprogramming. The role of miRNAs (microRNAs) involved in this process is poorly studied. Therefore, we performed global miRNA expression profiling using RNA-seq on commonly used cHL cell lines, non-Hodgkin lymphoma cell lines and sorted normal CD77 germinal centre B-cells as controls and characterized the cHL miRNome (microRNome). Among the 298 miRNAs expressed in cHL, 56 were significantly overexpressed and 23 downregulated ( < 0.05) compared to the controls. Moreover, we identified five miRNAs (hsa-miR-9-5p, hsa-miR-24-3p, hsa-miR-196a-5p, hsa-miR-21-5p, hsa-miR-155-5p) as especially important in the pathogenesis of this lymphoma. Target genes of the overexpressed miRNAs in cHL were significantly enriched ( < 0.05) in gene ontologies related to transcription factor activity. Therefore, we further focused on selected interactions with the and transcription factors attenuated in cHL and the NF-ĸB inhibitor . We confirmed the interactions between hsa-miR-27a-5p:SPI1, hsa-miR-330-3p:ELF-1, hsa-miR-450b-5p:ELF-1 and hsa-miR-23a-3p:TNFAIP3, which suggest that overexpression of these miRNAs contributes to silencing of the respective genes. Moreover, by analyzing microdissected HRS cells, we demonstrated that these miRNAs are also overexpressed in primary tumor cells. Therefore, these miRNAs play a role in silencing the B-cell phenotype in cHL.
经典型霍奇金淋巴瘤(cHL)的一个标志是B细胞转录因子的衰减,导致整体转录重编程。参与这一过程的微小RNA(miRNA)的作用研究较少。因此,我们使用RNA测序对常用的cHL细胞系、非霍奇金淋巴瘤细胞系以及分选的正常CD77生发中心B细胞进行了整体miRNA表达谱分析,并将其作为对照,对cHL的微小RNA组(miRNome)进行了特征描述。在cHL中表达的298种miRNA中,与对照相比,有56种显著上调,23种下调(<0.05)。此外,我们鉴定出5种miRNA(hsa-miR-9-5p、hsa-miR-24-3p、hsa-miR-196a-5p、hsa-miR-21-5p、hsa-miR-155-5p)在这种淋巴瘤的发病机制中尤为重要。cHL中上调的miRNA的靶基因在与转录因子活性相关的基因本体中显著富集(<0.05)。因此,我们进一步聚焦于与cHL中衰减的 和 转录因子以及NF-κB抑制剂的特定相互作用。我们证实了hsa-miR-27a-5p:SPI1、hsa-miR-330-3p:ELF-1、hsa-miR-450b-5p:ELF-1和hsa-miR-23a-3p:TNFAIP3之间的相互作用,这表明这些miRNA的过表达有助于各自基因的沉默。此外,通过分析显微切割的霍奇金和里德斯腾伯格(HRS)细胞,我们证明这些miRNA在原发性肿瘤细胞中也过表达。因此,这些miRNA在cHL中沉默B细胞表型中发挥作用。
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