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  • Open Access

    ARTICLE

    Long Noncoding RNA XIST Regulates miR-137–EZH2 Axis to Promote Tumor Metastasis in Colorectal Cancer

    Xingxiang Liu*†, Lin Cui, Dong Hua*‡

    Oncology Research, Vol.27, No.1, pp. 99-106, 2019, DOI:10.3727/096504018X15195193936573

    Abstract We aimed to investigate the significant role of long noncoding RNA X inactive specific transcript (XIST) in regulating tumor metastasis in colorectal cancer (CRC), as well as its possible mechanism. Expression of lncRNA XIST in CRC tissues and CRC cells was detected. CRC cells were transfected with pc-XIST, blank control si-XIST, or si-control, and then the effects of lncRNA XIST on CRC cell migration and invasion were investigated, along with the interaction between lncRNA XIST and miR-137. lncRNA XIST was upregulated in CRC tissues. Compared with HT29 cells that had low metastatic potential, XIST was… More >

  • Open Access

    ARTICLE

    Silencing Artemis Enhances Colorectal Cancer Cell Sensitivity to DNA-Damaging Agents

    Hai Liu*, Xuanxuan Wang*, Aihua Huang, Huaping Gao, Yikan Sun§, Tingting Jiang*, Liming Shi*, Xianjie Wu, Qinghua Dong#, Xiaonan Sun*

    Oncology Research, Vol.27, No.1, pp. 29-38, 2019, DOI:10.3727/096504018X15179694020751

    Abstract Artemis is a key protein of NHEJ (nonhomologous end joining), which is the major pathway for the repair of IR-induced DSBs in mammalian cells. However, the expression of Artemis in tumors and the influence of silencing Artemis on tumor sensitivity to radiation have not been investigated fully. In this study, we investigated how the expression levels of Artemis may affect the treatment outcome of radiotherapy and chemotherapy in colorectal cancer cells. First, we found that the expression of Artemis is strong in some human rectal cancer samples, being higher than in adjacent normal tissues using… More >

  • Open Access

    ARTICLE

    Liquiritigenin Inhibits Colorectal Cancer Proliferation, Invasion, and Epithelial-to-Mesenchymal Transition by Decreasing Expression of Runt-Related Transcription Factor 2

    Fan-Chun Meng, Jun-Kai Lin

    Oncology Research, Vol.27, No.2, pp. 139-146, 2019, DOI:10.3727/096504018X15185747911701

    Abstract Inhibition of tumor metastasis is one of the most important purposes in colorectal cancer (CRC) treatment. This study aimed to explore the effects of liquiritigenin, a flavonoid extracted from the roots of Glycyrrhiza uralensis Fisch, on HCT116 cell proliferation, invasion, and epithelial-to-mesenchymal transition (EMT). We found that liquiritigenin significantly inhibited HCT116 cell proliferation, invasion, and the EMT process, but had no influence on cell apoptosis. Moreover, liquiritigenin remarkably reduced the expression of runt-related transcription factor 2 (Runx2) in HCT116 cells. Overexpression of Runx2 obviously reversed the liquiritigenininduced invasion and EMT inhibition. Furthermore, liquiritigenin inactivated the More >

  • Open Access

    ARTICLE

    PAR2 Inhibition Enhanced the Sensitivity of Colorectal Cancer Cells to 5-FU and Reduced EMT Signaling

    Qiuying Quan*1, Fengyun Zhong†1, Xinwei Wang, Kai Chen§, Lingchuan Guo*

    Oncology Research, Vol.27, No.7, pp. 779-788, 2019, DOI:10.3727/096504018X15442985680348

    Abstract The aim of this study was to investigate the underlying mechanisms that transforming growth factor- (TGF- )-mediated epithelial-to-mesenchymal transition (EMT) in tumor cells contributes to 5-FU resistance. A series of experiments involving cell viability and caspase activity analyses, siRNA transfection, RNA isolation, and quantitative-PCR (qPCR) assay, cell migration analysis, Western blotting analysis of total protein and membrane protein were performed in this study. Mouse xenograft model was used to determine the effect of the PAR2 inhibitor in vivo. In this study, we found that protease-activated receptor 2 (PAR2) induction in 5-FU therapy is correlated with… More >

  • Open Access

    ARTICLE

    miR-455 Functions as a Tumor Suppressor Through Targeting GATA6 in Colorectal Cancer

    Hua Yunqi*1, Yin Fangrui†1, Yang Yongyan*, Jin Yunjian*, Zhang Wenhui*, Cao Kun*, Li Min*, Liu Xianfeng*, Ba Caixia*

    Oncology Research, Vol.27, No.3, pp. 311-316, 2019, DOI:10.3727/096504018X15220579006875

    Abstract Emerging evidence indicates that microRNAs (miRNAs) are often aberrantly expressed in human cancers. Meanwhile, the importance of miRNAs in regulating multiple cellular biological processes has been appreciated. The aim of this study was to investigate the significance of miR-455 and identify its possible mechanism in regulating colorectal cancer (CRC) progression. We found that the expression of miR-455 was sharply reduced in CRC tissues and cell lines. Importantly, the low expression of miR-455 was associated with poor overall survival of CRC patients. Overexpression of miR-455 in CRC cell lines significantly inhibited cell proliferation and migration in More >

  • Open Access

    ARTICLE

    Upregulation of miR-324-5p Inhibits Proliferation and Invasion of Colorectal Cancer Cells by Targeting ELAVL1

    Chijiang Gu*, Mingyuan Zhang*, Weiliang Sun*, Changzheng Dong

    Oncology Research, Vol.27, No.5, pp. 515-524, 2019, DOI:10.3727/096504018X15166183598572

    Abstract Colorectal cancer (CRC) is a common clinical cancer that remains incurable in most cases. miRNAs are reported to play a part in the development of various tumors. In the present study, we found that miR-324-5p was downregulated in CRC cells, while ELAV (embryonic lethal, abnormal vision, Drosophila)-like protein 1 (ELAVL1) showed a higher expression. miR-324-5p transfection significantly inhibited the proliferation as well as invasion in both SW620 and SW480 cells. miR-324-5p mimic transfection markedly decreased the expression of ELAVL1. Luciferase reporter gene assay confirmed that ELAVL1 is a direct target of miR- 324-5p. Furthermore, cancer invasion More >

  • Open Access

    ARTICLE

    The lncRNA FEZF1-AS1 Promotes the Progression of Colorectal Cancer Through Regulating OTX1 and Targeting miR-30a-5p

    Jing Li*†, Lian-mei Zhao, Cong Zhang, Meng Li§, Bo Gao, Xu-hua Hu, Jian Cao, Gui-ying Wang

    Oncology Research, Vol.28, No.1, pp. 51-63, 2020, DOI:10.3727/096504019X15619783964700

    Abstract Long noncoding RNAs (lncRNAs) participate in and regulate the biological process of colorectal cancer (CRC) progression. Our previous research identified differentially expressed lncRNAs in 10 CRC tissues and 10 matched nontumor tissues by next-generation sequencing (NGS). In this study, we identified an lncRNA, FEZF1 antisense RNA 1 (FEZF1-AS1), and further explored its function and mechanism in CRC. We verified that FEZF1-AS1 is highly expressed in CRC tissues and cell lines. Through functional experiments, we found that reduced levels of FEZF1-AS1 significantly suppressed CRC cell migration, invasion, and proliferation and inhibited tumor growth in vivo. Mechanistically,… More >

  • Open Access

    ARTICLE

    The AKT/GSK3β-Mediated Slug Expression Contributes to Oxaliplatin Resistance in Colorectal Cancer via Upregulation of ERCC1

    Wei Wei*1, Xiao-Dong Ma†1, Guan-Min Jiang, Bin Shi§, Wen Zhong, Chun-Lei Sun§, Liang Zhao*, Yan-Jiao Hou*, Hao Wang*

    Oncology Research, Vol.28, No.4, pp. 423-438, 2020, DOI:10.3727/096504020X15877284857868

    Abstract Although oxaliplatin serves as one of the first-line drugs prescribed for treating colorectal cancer (CRC), the therapeutic effect is disappointing due to drug resistance. So far, the molecular mechanisms mediating oxaliplatin resistance remain unclear. In this study, we found the chemoresistance in oxaliplatin-resistant HCT116 cells (HCT116/OXA) was mediated by the upregulation of ERCC1 expression. In addition, the acquisition of resistance induced epithelial–mesenchymal transition (EMT) as well as the Slug overexpression. On the contrary, Slug silencing reversed the EMT phenotype, decreased ERCC1 expression, and ameliorated drug resistance. Further mechanistical studies revealed the enhanced Slug expression resulted More >

  • Open Access

    ERRATUM

    miR-107 Promotes Proliferation and Inhibits Apoptosis of Colon Cancer Cells by Targeting Prostate Apoptosis Response-4 (Par4)

    Fen Liu*†, Shaojun Liu*, Feiyan Ai*†, Decai Zhang*†, Zhiming Xiao*, Xinmin Nie, Yunfeng Fu§

    Oncology Research, Vol.28, No.5, pp. 553-557, 2020, DOI:10.3727/096504020X16032056440094

    Abstract Colorectal cancer (CRC) is one of the most common malignancies in the world, with a high incidence and a high mortality. However, the pathogenesis of CRC carcinogenesis is still unexplored. In this study, we investigated the role of miR-107 in the regulation of CRC cell proliferation and apoptosis. First, the expression of miR-107 was observed to be aberrantly increased in human CRC tumor tissues and cell lines when compared to the colonic control tissues and colon epithelial cells. Further study showed that the proliferative and apoptotic capacities of human CRC SW480 and LoVo cells were… More >

  • Open Access

    ARTICLE

    PNN and KCNQ1OT1 Can Predict the Efficacy of Adjuvant Fluoropyrimidine-Based Chemotherapy in Colorectal Cancer Patients

    Andrea Lapucci*†1, Gabriele Perrone*†1, Antonello Di Paolo‡§, Cristina Napoli*†, Ida Landini*†, Giandomenico Roviello*†, Laura Calosi, Antonio Giuseppe Naccarato#, Alfredo Falcone#, Daniele Bani, Enrico Mini*†§2, Stefania Nobili*†§2,3

    Oncology Research, Vol.28, No.6, pp. 631-644, 2020, DOI:10.3727/096504020X16056983169118

    Abstract The benefit of adjuvant chemotherapy in the early stages of colorectal cancer (CRC) is still disappointing and the prediction of treatment outcome quite difficult. Recently, through a transcriptomic approach, we evidenced a role of PNN and KCNQ1OT1 gene expression in predicting response to fluoropyrimidine-based adjuvant chemotherapy in stage III CRC patients. Thus, the aim of this study was to validate in an independent cohort of stages II–III CRC patients our previous findings. PNN and KCNQ1OT1 mRNA expression levels were evaluated in 74 formalin-fixed paraffin-embedded tumor and matched normal mucosa samples obtained by stages II–III CRC patients treated… More >

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