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Shen MZ, Zhang Y, Wu F, Shen MZ, Liang JL, Zhang XL, Liu XJ, Li XS, Wang RS. MicroRNA-298 determines the radio-resistance of colorectal cancer cells by directly targeting human dual-specificity tyrosine(Y)-regulated kinase 1A. World J Gastrointest Oncol 2024; 16:1453-1464. [PMID: 38660649 PMCID: PMC11037043 DOI: 10.4251/wjgo.v16.i4.1453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 12/31/2023] [Accepted: 02/02/2024] [Indexed: 04/10/2024] Open
Abstract
BACKGROUND Radiotherapy stands as a promising therapeutic modality for colorectal cancer (CRC); yet, the formidable challenge posed by radio-resistance significantly undermines its efficacy in achieving CRC remission. AIM To elucidate the role played by microRNA-298 (miR-298) in CRC radio-resistance. METHODS To establish a radio-resistant CRC cell line, HT-29 cells underwent exposure to 5 gray ionizing radiation that was followed by a 7-d recovery period. The quantification of miR-298 levels within CRC cells was conducted through quantitative RT-PCR, and protein expression determination was realized through Western blotting. Cell viability was assessed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay and proliferation by clonogenic assay. Radio-induced apoptosis was discerned through flow cytometry analysis. RESULTS We observed a marked upregulation of miR-298 in radio-resistant CRC cells. MiR-298 emerged as a key determinant of cell survival following radiation exposure, as its overexpression led to a notable reduction in radiation-induced apoptosis. Intriguingly, miR-298 expression exhibited a strong correlation with CRC cell viability. Further investigation unveiled human dual-specificity tyrosine(Y)-regulated kinase 1A (DYRK1A) as miR-298's direct target. CONCLUSION Taken together, our findings underline the role played by miR-298 in bolstering radio-resistance in CRC cells by means of DYRK1A downregulation, thereby positioning miR-298 as a promising candidate for mitigating radio-resistance in CRC.
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Affiliation(s)
- Mei-Zhu Shen
- Department of Radiotherapy, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
| | - Yong Zhang
- Department of Radiotherapy, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
| | - Fang Wu
- Department of Radiotherapy, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
| | - Mei-Zhen Shen
- Department of Radiotherapy, People’s Hospital of Guangxi Zhuang Autonomous Region, Nanning 530021, Guangxi Zhuang Autonomous Region, China
| | - Jun-Lin Liang
- Department of Colorectal Anal Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
| | - Xiao-Long Zhang
- Department of Colorectal Anal Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
| | - Xiao-Jian Liu
- Department of Colorectal Anal Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
| | - Xin-Shu Li
- Department of Clinical Medicine, Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
| | - Ren-Sheng Wang
- Department of Radiotherapy, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
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Gong W, Guo Y, Yuan H, Chai R, Wan Z, Zheng B, Hu X, Chen B, Gao S, Dai Q, Yu P, Tu S. Loss of exosomal miR-200b-3p from hypoxia cancer-associated fibroblasts promotes tumorigenesis and reduces sensitivity to 5-Flourouracil in colorectal cancer via upregulation of ZEB1 and E2F3. Cancer Gene Ther 2023:10.1038/s41417-023-00591-5. [PMID: 36890211 DOI: 10.1038/s41417-023-00591-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 01/05/2023] [Accepted: 01/17/2023] [Indexed: 03/10/2023]
Abstract
Hypoxia-mediated tumor progression is a major clinical challenge in human cancers including colorectal cancer (CRC). In addition, exosome-mediated transfer of miRNAs from cancer-associated fibroblasts (CAFs) to cancer cells could promote tumor progression. However, the mechanisms by which hypoxia CAFs promotes CRC progression remain largely unknown. CAFs and normal fibroblasts (NFs) were isolated from CRC tissues and adjacent normal tissues. Next, exosomes were isolated from the supernatant of CAFs that cultured under normoxia (CAFs-N-Exo) and hypoxia (CAFs-H-Exo). RNA-sequencing was then performed to identify differentially expressed miRNAs (DEMs) between CAFs-N-Exo and CAFs-H-Exo. Compared with exosomes derived from normoxia CAFs, exosomes derived from hypoxic CAFs were able to promote CRC cell proliferation, migration, invasion, stemness and reduce the sensitivity of CRC cells to 5-fluorouracil (5-FU). In addition, miR-200b-3p levels were dramatically decreased in exosomes derived from hypoxic CAFs. Remarkably, increasing exosomal miR-200b-3p in hypoxic CAFs reversed the promoting effects of hypoxic CAFs on CRC cell growth in vitro and in vivo. Furthermore, miR-200b-3p agomir could inhibit CRC cell migration, invasion, stemness and increase the sensitivity of SW480 cells to 5-FU via downregulating ZEB1 and E2F3. Collectively, loss of exosomal miR-200b-3p in hypoxia CAFs could contribute to CRC progression via upregulation of ZEB1 and E2F3. Thus, increasing exosomal miR-200b-3p might serve as an alternative approach for the treatment of CRC.
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Affiliation(s)
- Wenjing Gong
- General Surgery, Cancer Center, Department of Colorectal Surgery, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, PR China
| | - Yang Guo
- General Surgery, Cancer Center, Department of Colorectal Surgery, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, PR China
| | - Hang Yuan
- General Surgery, Cancer Center, Department of Colorectal Surgery, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, PR China
| | - Rui Chai
- General Surgery, Cancer Center, Department of Colorectal Surgery, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, PR China
| | - Ziang Wan
- General Surgery, Cancer Center, Department of Colorectal Surgery, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, PR China
| | - Boan Zheng
- General Surgery, Cancer Center, Department of Colorectal Surgery, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, PR China
| | - Xinye Hu
- General Surgery, Cancer Center, Department of Colorectal Surgery, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, PR China
| | - Bingchen Chen
- General Surgery, Cancer Center, Department of Colorectal Surgery, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, PR China
| | - Shan Gao
- General Surgery, Cancer Center, Department of Colorectal Surgery, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, PR China
| | - Qiaoqiong Dai
- General Surgery, Cancer Center, Department of Colorectal Surgery, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, PR China
| | - Peng Yu
- General Surgery, Cancer Center, Department of Colorectal Surgery, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, PR China
| | - Shiliang Tu
- General Surgery, Cancer Center, Department of Colorectal Surgery, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, PR China.
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Exosomal miR-224-5p from Colorectal Cancer Cells Promotes Malignant Transformation of Human Normal Colon Epithelial Cells by Promoting Cell Proliferation through Downregulation of CMTM4. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:5983629. [PMID: 35814269 PMCID: PMC9262543 DOI: 10.1155/2022/5983629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 05/23/2022] [Indexed: 11/18/2022]
Abstract
Background Interactions between malignant cells and neighboring normal cells are important for carcinogenesis. In addition, cancer cell-derived exosomes have been shown to promote the malignant transformation of recipient cells, but the mechanisms remain unclear. Methods The level of miR-224-5p in CRC cell-derived exosomes was determined by RT-qPCR assay. In addition, PKH26 dye-labeled exosomes were used to assess the efficacy of the transfer of exosomes between SW620 and normal colon epithelial cell line CCD 841 CoN. Results In this study, we found that overexpression of miR-224-5p significantly promoted the proliferation, migration, and invasion and inhibited the oxidative stress of SW620 cells. In addition, miR-224-5p can be transferred from SW620 cells to CCD 841 CoN cells via exosomes. SW620 cell-derived exosomal miR-224-5p markedly promoted proliferation, migration, and invasion of CCD 841 CoN cells. Meanwhile, SW620 cell-derived exosomal miR-224-5p notably decreased the expression of CMTM4 in CCD 841 CoN cells. Furthermore, SW620 cell-derived exosomal miR-224-5p significantly promoted tumor growth in a xenograft model in vivo. Conclusion These findings suggested that SW620 cell-derived exosomal miR-224-5p could promote malignant transformation and tumorigenesis in vitro and in vivo via downregulation of CMTM4, suggesting that miR-224-5p might be a potential target for therapies in CRC.
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Molecular mechanism of miR-34b-5p and RNA binding protein HuR binding to lncRNA OIP5-AS1 in colon cancer cells. Cancer Gene Ther 2022; 29:612-624. [PMID: 34021273 DOI: 10.1038/s41417-021-00342-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 04/28/2021] [Accepted: 05/05/2021] [Indexed: 02/02/2023]
Abstract
Colon cancer (CC) is a leading cause of cancer-related death. Long non-coding RNA OIP5-AS1 (lncRNA OIP5-AS1) expression pattern has been studied in many cancers. We aimed to identify the mechanism of lncRNA OIP5-AS1 in CC development. OIP5-AS1 expression pattern in CC tissues and cells was detected and the relation between OIP5-AS1 level and CC prognosis was analyzed. The proliferation, migration and invasion of CC cells were detected after silencing or overexpression of OIP5-AS1. Tumor xenograft in nude mice was established to verify the effect of OIP5-AS1 in vivo. The interaction between HuR protein and OIP5-AS1 and the interaction of miR-34b-5p with HuR and OIP5-AS1 were measured. OIP5-AS1 was highly expressed in CC and associated with poor prognosis. Silencing OIP5-AS1 inhibited CC cell malignant behaviors and inhibited the growth rate and tumor weight. In the mechanism, HuR bound to OIP5-AS1 and stabilized OIP5-AS1 expression. Both miR-34-5p and HuR bind to OIP5 and oppositely affect its expression. miR-34b-5p inhibited the proliferation and invasion of CC cells by inhibiting OIP5-AS1 and PI3K/Akt pathway. miR-34b-5p inhibited CC growth by inhibiting OIP5-AS1. Collectively, miR-34b-5p targets HuR and miR-34b-5p binds to OIP5-AS1 with HuR, thus inhibiting OIP5-AS1 and PI3K/Akt pathway and CC progression.
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Gao SJ, Ren SN, Liu YT, Yan HW, Chen XB. Targeting EGFR sensitizes 5-Fu-resistant colon cancer cells through modification of the lncRNA-FGD5-AS1-miR-330-3p-Hexokinase 2 axis. MOLECULAR THERAPY-ONCOLYTICS 2021; 23:14-25. [PMID: 34589581 PMCID: PMC8455313 DOI: 10.1016/j.omto.2021.06.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 06/30/2021] [Indexed: 12/19/2022]
Abstract
5-Fluorouracil (5-Fu) is a widely applied anti-cancer agent against colorectal cancer (CRC), yet a number of CRC patients have developed resistance to 5-Fu-based chemotherapy. The epidermal growth factor receptor (EGFR) is recognized as an oncogene that promotes diverse cancer progresses. In addition, long noncoding RNAs (lncRNAs) are essential regulators of cancers. Here we report that EGFR and lncRNA-FGD5-AS1 promoted 5-Fu resistance of CRC. By establishing the 5-Fu-resistant CRC cell line, we detected that EGFR, FGD5-AS1, and glucose metabolism were significantly elevated in 5-Fu-resistant CRC cells. A microRNA-microarray analysis revealed that miR-330-3p functions as a downstream effector of FGD5-AS1. FGD5-AS1 directly sponged miR-330-3p to form a competing endogenous RNA (ceRNA) network, leading to inhibition of miR-330-3p expression. Furthermore, bioinformatics analysis revealed that Hexokinase 2 (HK2) was a potential target of miR-330-3p, which was validated by luciferase assay. Rescue experiments demonstrated that FGD5-AS1 promotes glycolysis through modulating the miR-330-3p-HK2 axis, leading to 5-Fu resistance of CRC cancer cells. Finally, in vitro and in vivo xenograft experiments consistently demonstrated that inhibition of EGFR by the specific inhibitor erlotinib effectively enhanced the anti-tumor toxicity of 5-Fu by targeting the EGFR-FGD5-AS1-miR-330-3p-HK2 pathway. In summary, this study demonstrates new mechanisms of the EGFR-modulated 5-Fu resistance through modulating the noncoding RNA network, contributing to development of new approaches against chemoresistant CRC.
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Affiliation(s)
- Su-Jie Gao
- Department of Anesthesia, China-Japan Union Hospital of Jilin University, Changchun, 130033 Jilin Province, China
| | - Sheng-Nan Ren
- Department of General Surgery, China-Japan Union Hospital of Jilin University, Changchun, 130033 Jilin Province, China
| | - Yi-Ting Liu
- Department of Radiology, Peking University School of Oncology, Beijing Cancer Hospital & Institute, 100871 Beijing, China
| | - Hong-Wei Yan
- Department of General Surgery, Chinese Medicine Hospital, Liuhe, 135300 Jilin Province, China
| | - Xue-Bo Chen
- Department of General Surgery, China-Japan Union Hospital of Jilin University, Changchun, 130033 Jilin Province, China
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Cerrito MG, Grassilli E. Identifying Novel Actionable Targets in Colon Cancer. Biomedicines 2021; 9:biomedicines9050579. [PMID: 34065438 PMCID: PMC8160963 DOI: 10.3390/biomedicines9050579] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 05/10/2021] [Accepted: 05/14/2021] [Indexed: 02/07/2023] Open
Abstract
Colorectal cancer is the fourth cause of death from cancer worldwide, mainly due to the high incidence of drug-resistance toward classic chemotherapeutic and newly targeted drugs. In the last decade or so, the development of novel high-throughput approaches, both genome-wide and chemical, allowed the identification of novel actionable targets and the development of the relative specific inhibitors to be used either to re-sensitize drug-resistant tumors (in combination with chemotherapy) or to be synthetic lethal for tumors with specific oncogenic mutations. Finally, high-throughput screening using FDA-approved libraries of “known” drugs uncovered new therapeutic applications of drugs (used alone or in combination) that have been in the clinic for decades for treating non-cancerous diseases (re-positioning or re-purposing approach). Thus, several novel actionable targets have been identified and some of them are already being tested in clinical trials, indicating that high-throughput approaches, especially those involving drug re-positioning, may lead in a near future to significant improvement of the therapy for colon cancer patients, especially in the context of a personalized approach, i.e., in defined subgroups of patients whose tumors carry certain mutations.
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Micallef I, Baron B. The Mechanistic Roles of ncRNAs in Promoting and Supporting Chemoresistance of Colorectal Cancer. Noncoding RNA 2021; 7:24. [PMID: 33807355 PMCID: PMC8103280 DOI: 10.3390/ncrna7020024] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 03/03/2021] [Accepted: 03/29/2021] [Indexed: 12/12/2022] Open
Abstract
Colorectal Cancer (CRC) is one of the most common gastrointestinal malignancies which has quite a high mortality rate. Despite the advances made in CRC treatment, effective therapy is still quite challenging, particularly due to resistance arising throughout the treatment regimen. Several studies have been carried out to identify CRC chemoresistance mechanisms, with research showing different signalling pathways, certain ATP binding cassette (ABC) transporters and epithelial mesenchymal transition (EMT), among others to be responsible for the failure of CRC chemotherapies. In the last decade, it has become increasingly evident that certain non-coding RNA (ncRNA) families are involved in chemoresistance. Research investigations have demonstrated that dysregulation of microRNAs (miRNAs), long non-coding RNAs (lncRNAs) and circular RNAs (circRNAs) contribute towards promoting resistance in CRC via different mechanisms. Considering the currently available data on this phenomenon, a better understanding of how these ncRNAs participate in chemoresistance can lead to suitable solutions to overcome this problem in CRC. This review will first focus on discussing the different mechanisms of CRC resistance identified so far. The focus will then shift onto the roles of miRNAs, lncRNAs and circRNAs in promoting 5-fluorouracil (5-FU), oxaliplatin (OXA), cisplatin and doxorubicin (DOX) resistance in CRC, specifically using ncRNAs which have been recently identified and validated under in vivo or in vitro conditions.
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Affiliation(s)
| | - Byron Baron
- Centre for Molecular Medicine and Biobanking, University of Malta, MSD2080 Msida, Malta;
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Yang C, Zhang Y, Lin S, Liu Y, Li W. Suppressing the KIF20A/NUAK1/Nrf2/GPX4 signaling pathway induces ferroptosis and enhances the sensitivity of colorectal cancer to oxaliplatin. Aging (Albany NY) 2021; 13:13515-13534. [PMID: 33819186 PMCID: PMC8202845 DOI: 10.18632/aging.202774] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Accepted: 12/18/2020] [Indexed: 04/11/2023]
Abstract
Oxaliplatin resistance can develop in colorectal cancer (CRC), which may involve inhibition of ferroptosis, although further research is needed to understand this potential mechanism. We evaluated CRC cells with acquired oxaliplatin resistance (HCT116-Or) or congenital resistance (H716) to determine whether a ferroptosis inducer (RSL3) or inhibitor (liproxstatin-1) could modulate the effects of oxaliplatin. The results suggested that induction of ferroptosis could significantly reverse the oxaliplatin resistance of the CRC cells. Bioinformatic and cytobiological searches also revealed that KIF20A was highly expressed in the oxaliplatin-resistant cell lines and was strongly correlated with survival among CRC patients. Silencing KIF20A enhanced cellular sensitivity to oxaliplatin both in vivo and in vitro, and silencing KIF20A also suppressed NUAK1 activation, while a NUAK1 agonist (ETC-1002) could reverse the oxaliplatin sensitivity of KIF20A-silenced cells. Moreover, silencing NUAK1 up-regulated the expression of PP1β, down-regulated the phosphorylation of downstream GSK3βSer9, suppressed the nuclear import of Nrf2, inhibited the expression of a ferroptosis key negative regulatory protein (GPX4), and blocked cellular resistance. Applying a Nrf2 agonist (oltipraz) also reversed the oxaliplatin sensitivity of NUAK1-silenced cells. Therefore, cellular ferroptosis may be inhibited via the KIF20A/NUAK1/PP1β/GPX4 pathway in CRC cells, which may underly the resistance of CRC to oxaliplatin.
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Affiliation(s)
- Changshun Yang
- Department of Surgical Oncology, Fujian Provincial Hospital, Fuzhou 350001, China
| | - Yu Zhang
- Department of Pathology, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350001, China
| | - Shengtao Lin
- Department of Surgical Oncology, Fujian Provincial Hospital, Fuzhou 350001, China
| | - Yi Liu
- Department of Endoscopy, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100000, China
| | - Weihua Li
- Department of Surgical Oncology, Fujian Provincial Hospital, Fuzhou 350001, China
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Yu F, Liu J, Dong W, Xie J, Zhao X. The diagnostic value of miR-145 and miR-205 in patients with cervical cancer. Am J Transl Res 2021; 13:1825-1832. [PMID: 33841707 PMCID: PMC8014394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 11/22/2020] [Indexed: 06/12/2023]
Abstract
OBJECTIVE To investigate the diagnostic value of miRNA-145 (miR-145) and miRNA-205 (miR-205) in cervical cancer patients. METHODS Cervical tissue samples were collected from 144 patients diagnosed with and suspected to have cervical cancer in our hospital. Confirmed by pathology, 84 samples were obtained from cervical cancer patients and 60 samples were from patients with cervical intraepithelial neoplasia. Meanwhile, 30 patients with cervicitis were also selected, and the expression levels of miR-145, miR-205 and human papillomavirus (HPV) were detected in cervical lesions and normal cervical tissue. RESULTS In comparison to normal cervical tissue, cervicitis and cervical intraepithelial neoplasia groups, the relative expression level of miR-145 was significantly lower, whereas the relative expression level of miR-205 was notably higher in the cervical cancer group, respectively (P<0.001). The area under the receiver operating characteristic (ROC) curve of miR-145 for diagnosis of cervical cancer in patients was 0.878, of which the sensitivity and the specificity were 0.905 and 0.822, respectively. The area under the ROC curve of miR-205 was 0.881, of which the sensitivity and the specificity was 0.869 and 0.889, respectively. Among all patients, the relative expression level of miR-145 was significantly lower while the relative expression level of miR-205 was considerably higher in HPV-positive patients than those of HPV-negative groups (P<0.001). Parauterine invasion, FIGO stage III-IV and lymphatic metastasis were considered as independent factors that affect the expression of miR-145. FIGO stage III-IV and lymphatic metastasis were independent factors affecting the expression of miR-205. CONCLUSION The low expression level of miR-145 and the high expression level of miR-205 in patients with cervical cancer demonstrate a certain diagnostic value in cervical cancer. The expression level of miR-145 and miR-205 is correlated with HPV infection and cervical tumor malignancy.
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Affiliation(s)
- Furong Yu
- Department of Gynaecology and Obstetrics, The First Affiliated Hospital of University of South China Hengyang, Hu'nan Province, China
| | - Jie Liu
- Department of Gynaecology and Obstetrics, The First Affiliated Hospital of University of South China Hengyang, Hu'nan Province, China
| | - Weilei Dong
- Department of Gynaecology and Obstetrics, The First Affiliated Hospital of University of South China Hengyang, Hu'nan Province, China
| | - Jing Xie
- Department of Gynaecology and Obstetrics, The First Affiliated Hospital of University of South China Hengyang, Hu'nan Province, China
| | - Xia Zhao
- Department of Gynaecology and Obstetrics, The First Affiliated Hospital of University of South China Hengyang, Hu'nan Province, China
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Zhang J, Ding L, Sun G, Ning H, Huang R. Suppression of LINC00460 mediated the sensitization of HCT116 cells to ionizing radiation by inhibiting epithelial-mesenchymal transition. Toxicol Res (Camb) 2020; 9:107-116. [PMID: 32440342 DOI: 10.1093/toxres/tfaa010] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 02/12/2020] [Accepted: 02/25/2020] [Indexed: 12/19/2022] Open
Abstract
Radiation resistance is the most common challenge for improving radiotherapy. The mechanisms underlying the development of radioresistance remain poorly understood. This study aims to explore the role of LINC00460 in ionizing radiation-induced radioresistance as well as the mechanisms by which LINC00460 is regulated by radiation exposure. The expression of LINC00460 was measured. Cell proliferation and colony formation were measured in HCT116 cells after treatment by radiation. The development of epithelial-mesenchymal transition (EMT) was determined with or without knockdown LINC00460 expression using western blot analysis. Transcription activity was determined using a series of LINC00460-promoter luciferase reporter gene vectors. LINC00460 expression was significantly higher in HCT116 cells, relative to other cell types, with LINC00460 expression significantly affecting HCT116 cell proliferation. Suppression of LINC00460 inhibits EMT development in HCT116 cells via regulation of ZEB1 expression. Furthermore, LINC00460 expression was induced by irradiation via the activation of c-jun transcription factor-binding element located on the LINC00460 promoter. LINC00460 was shown to play a crucial role in EMT-associated progression of colorectal cancer, indicating that LINC00460 may be an indicator or new potential therapeutic target for colorectal cancer radiosensitization.
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Affiliation(s)
- Jiani Zhang
- Gerontology Department of Xiangya Hospital, Central South University, Changsha, Xiangya road 238, Hunan Province 410078, P. R. China
| | - Lixin Ding
- Department of Radiology, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Taiping road 27, Beijing, 100088, P. R. China
| | - Gaofeng Sun
- Department of Chronic and Non-communicable Diseases Control, City Center for Disease Control and Prevention, Jingyi Road 58, Urumqi, 830026, P. R. China
| | - Huacheng Ning
- Department of Occupational and Environmental Health, Xiangya School of Public Heath, Central South University, Xiangya Road 238, Changsha, Hunan Province 410078, P. R. China
| | - Ruixue Huang
- Department of Occupational and Environmental Health, Xiangya School of Public Heath, Central South University, Xiangya Road 238, Changsha, Hunan Province 410078, P. R. China
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Liu Y, Chen X, Chen X, Liu J, Gu H, Fan R, Ge H. Long non-coding RNA HOTAIR knockdown enhances radiosensitivity through regulating microRNA-93/ATG12 axis in colorectal cancer. Cell Death Dis 2020; 11:175. [PMID: 32144238 PMCID: PMC7060216 DOI: 10.1038/s41419-020-2268-8] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Revised: 12/24/2019] [Accepted: 01/09/2020] [Indexed: 12/25/2022]
Abstract
Colorectal cancer (CRC) is a global healthcare problem. Radioresistance is a huge setback for CRC radiotherapy. In this text, the roles and molecular mechanisms of long non-coding RNA HOTAIR in CRC tumorigenesis and radioresistance were further investigated. ATG12 mRNA, HOTAIR, and microRNA-93 (miR-93) levels were measured by quantitative reverse transcription polymerase chain reaction (RT-qPCR) assay. Protein levels of LC3 I, LC3 II, p62, ATG12, cleaved caspase 3, Bax, and Bcl-2 were detected by western blotting assay in cells and were examined by immunohistochemistry (IHC) assay in tissues. Cell survival fractions, viability, and apoptotic rates were determined by clonogenic survival assay, CCK-8 assay, and flow cytometry analysis, respectively. The relationships of HOTAIR, miR-93, and ATG12 were tested by bioinformatics analysis and luciferase reporter assay. Mouse xenograft tumor models were established to investigate the influence of HOTAIR knockdown on CRC radioresistance in vivo. We found that HOTAIR expression was markedly upregulated in plasma from CRC patients after radiotherapy and CRC cells after irradiation. HOTAIR knockdown, miR-93 overexpression, or ATG12 silencing weakened cell viability, induced cell apoptosis, inhibited cell autophagy, and enhanced cell radiosensitivity in CRC. HOTAIR exerted its functions by downregulating miR-93. Moreover, HOTAIR functioned as a molecular sponge of miR-93 to regulate ATG12 expression. ATG12 protein expression was markedly upregulated and associated with miR-93 and HOTAIR expression in CRC tissues. Furthermore, HOTAIR knockdown enhanced radiosensitivity of CRC xenograft tumors by regulating miR-93/ATG12 axis. In conclusion, HOTAIR knockdown potentiated radiosensitivity through regulating miR-93/ATG12 axis in CRC, further elucidating the roles and molecular basis of HOTAIR in CRC radioresistance.
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Affiliation(s)
- Yingqiang Liu
- Department of General Surgery, The Affiliated Tumor Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Xijuan Chen
- Department of Radiation Oncology, The Affiliated Tumor Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Xiling Chen
- Department of Geriatric Medicine, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Junqi Liu
- Department of Radiation Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Hao Gu
- Department of Radiation Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Ruitai Fan
- Department of Radiation Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Hong Ge
- Department of Radiation Oncology, The Affiliated Tumor Hospital of Zhengzhou University, Zhengzhou, Henan, China.
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12
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Polvani S, Pepe S, Milani S, Galli A. COUP-TFII in Health and Disease. Cells 2019; 9:E101. [PMID: 31906104 PMCID: PMC7016888 DOI: 10.3390/cells9010101] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 12/27/2019] [Accepted: 12/29/2019] [Indexed: 12/14/2022] Open
Abstract
The nuclear receptors (NRs) belong to a vast family of evolutionary conserved proteins acting as ligand-activated transcription factors. Functionally, NRs are essential in embryogenesis and organogenesis and in adulthood they are involved in almost every physiological and pathological process. Our knowledge of NRs action has greatly improved in recent years, demonstrating that both their expression and activity are tightly regulated by a network of signaling pathways, miRNA and reciprocal interactions. The Chicken Ovalbumin Upstream Promoter Transcription Factor II (COUP-TFII, NR2F2) is a NR classified as an orphan due to the lack of a known natural ligand. Although its expression peaks during development, and then decreases considerably, in adult tissues, COUP-TFII is an important regulator of differentiation and it is variably implicated in tissues homeostasis. As such, alterations of its expression or its transcriptional activity have been studied and linked to a spectrum of diseases in organs and tissues of different origins. Indeed, an altered COUP-TFII expression and activity may cause infertility, abnormality in the vascular system and metabolic diseases like diabetes. Moreover, COUP-TFII is actively investigated in cancer research but its role in tumor progression is yet to be fully understood. In this review, we summarize the current understanding of COUP-TFII in healthy and pathological conditions, proposing an updated and critical view of the many functions of this NR.
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Affiliation(s)
- Simone Polvani
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, Gastroenterology Unit, University of Florence, viale Pieraccini 6, 50139 Firenze, Italy; (S.P.); (S.M.)
- Department of Experimental and Clinical Medicine, University of Florence, largo Brambilla 50, 50139 Firenze, Italy
| | - Sara Pepe
- Istituto per la Ricerca, la Prevenzione e la rete Oncologica (ISPRO), viale Pieraccini 6, 50139 Firenze, Italy;
- Department of Medical Biotechnologies, University of Siena, via M. Bracci 16, 53100 Siena, Italy
| | - Stefano Milani
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, Gastroenterology Unit, University of Florence, viale Pieraccini 6, 50139 Firenze, Italy; (S.P.); (S.M.)
| | - Andrea Galli
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, Gastroenterology Unit, University of Florence, viale Pieraccini 6, 50139 Firenze, Italy; (S.P.); (S.M.)
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Angioregulatory microRNAs in Colorectal Cancer. Cancers (Basel) 2019; 12:cancers12010071. [PMID: 31887997 PMCID: PMC7016698 DOI: 10.3390/cancers12010071] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 12/21/2019] [Accepted: 12/23/2019] [Indexed: 12/14/2022] Open
Abstract
Colorectal cancer (CRC) is one of the leading causes of cancer mortality. Angiogenesis is a rate-determining step in CRC development and metastasis. The balance of angiogenic and antiangiogenic factors is crucial in this process. Angiogenesis-related genes can be regulated post-transcriptionally by microRNAs (miRNAs) and some miRNAs have been shown to shuttle between tumor cells and the tumor microenvironment (TME). MiRNAs have context-dependent actions and can promote or suppress angiogenesis dependent on the type of cancer. On the one hand, miRNAs downregulate anti-angiogenic targets and lead to angiogenesis induction. Tumor suppressor miRNAs, on the other hand, enhance anti-angiogenic response by targeting pro-angiogenic factors. Understanding the interaction between these miRNAs and their target mRNAs will help to unravel molecular mechanisms involved in CRC progression. The aim of this article is to review the current literature on angioregulatory miRNAs in CRC.
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14
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Xie N, Liu YR, Li YM, Yang YN, Pan L, Wei YB, Wang PY, Li YJ, Xie SY. Cisplatin decreases cyclin D2 expression via upregulating miR‑93 to inhibit lung adenocarcinoma cell growth. Mol Med Rep 2019; 20:3355-3362. [PMID: 31432162 PMCID: PMC6755153 DOI: 10.3892/mmr.2019.10566] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Accepted: 07/11/2019] [Indexed: 12/18/2022] Open
Abstract
MicroRNAs (miRNAs/miRs) serve important roles in the chemotherapeutic effect of anticancer drugs. To investigate the roles of miRNAs in cisplatin‑induced suppression of lung adenocarcinoma cell proliferation, A549 cells were treated with different concentrations of cisplatin. An MTT assay demonstrated that cisplatin inhibited A549 cell proliferation in a dose‑dependent manner. Cisplatin induced cell apoptosis and inhibited cell migration by increasing the levels of miR‑93, miR‑26a and miR‑26b. Furthermore, as an upstream factor, miR‑93 was proposed to regulate cyclin D2 expression in miR‑93‑transfected A549 cells. Cisplatin also induced Bcl‑2‑associated X protein expression, and decreased that of Bcl‑2 and c‑Myc in lung adenocarcinoma cells. In vivo analysis further supported that cisplatin inhibited lung adenocarcinoma cell growth by regulating cyclin D2 and miR‑93 expression. In conclusion, our findings demonstrated that cisplatin could effectively inhibit lung adenocarcinoma cell proliferation by decreasing cyclin D2 expression via miR‑93.
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Affiliation(s)
- Ning Xie
- Department of Chest Surgery, Yantaishan Hospital, Yantai, Shandong 264000, P.R. China
| | - Yuan-Rong Liu
- Department of Biochemistry and Molecular Biology, Key Laboratory of Tumor Molecular Biology in Binzhou Medical University, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
| | - Yan-Mei Li
- Department of Chest Surgery, Yantaishan Hospital, Yantai, Shandong 264000, P.R. China
| | - Ya-Nan Yang
- Department of Biochemistry and Molecular Biology, Key Laboratory of Tumor Molecular Biology in Binzhou Medical University, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
| | - Li Pan
- Department of Biochemistry and Molecular Biology, Key Laboratory of Tumor Molecular Biology in Binzhou Medical University, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
| | - Yu-Bo Wei
- Department of Biochemistry and Molecular Biology, Key Laboratory of Tumor Molecular Biology in Binzhou Medical University, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
| | - Ping-Yu Wang
- Department of Biochemistry and Molecular Biology, Key Laboratory of Tumor Molecular Biology in Binzhou Medical University, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
| | - You-Jie Li
- Department of Biochemistry and Molecular Biology, Key Laboratory of Tumor Molecular Biology in Binzhou Medical University, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
| | - Shu-Yang Xie
- Department of Biochemistry and Molecular Biology, Key Laboratory of Tumor Molecular Biology in Binzhou Medical University, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
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15
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Nakagawa Y, Kuranaga Y, Tahara T, Yamashita H, Shibata T, Nagasaka M, Funasaka K, Ohmiya N, Akao Y. Induced miR-31 by 5-fluorouracil exposure contributes to the resistance in colorectal tumors. Cancer Sci 2019; 110:2540-2548. [PMID: 31162779 PMCID: PMC6676105 DOI: 10.1111/cas.14090] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 04/30/2019] [Accepted: 05/25/2019] [Indexed: 12/20/2022] Open
Abstract
Drug resistance makes treatment difficult in cancers. The present study identifies and analyzes drug resistance‐related miRNA in colorectal cancer. We established 4 types of 5‐fluorouracil (5‐FU)‐resistant colon cancer cell lines in vitro and in vivo. We then analyzed the miRNA expression profile by miRNA array in these 4 cell lines, and identified the drug resistance‐related miRNAs. We examined the expression levels of the identified miRNA in 112 colorectal tumor samples from the patients. We identified 12 possible miRNAs involved in 5‐FU resistance by miRNA arrays. We then examined the relationship between miR‐31, which was the most promising among them, and drug resistance. The ectopic expression of mimic miR‐31 showed significant 5‐FU resistance in the parental DLD‐1 cells, while anti–miR‐31 caused significant growth inhibition in DLD/F cells; that is, 5‐FU‐resistant colon cancer cell line DLD‐1 under exposure to 5‐FU. When we exposed high doses of 5‐FU to parent or 5‐FU‐resistant cells, the expression levels of miR‐31 were raised higher than those of controls. Notably, the expression levels of miR‐31 were positively correlated with the grade of clinical stages of colorectal tumors. The protein expression levels of factors inhibiting hypoxia‐inducible factor 1 were downregulated by transfection of mimic miR‐31 into DLD‐1 cells. This study provides evidence supporting the association of miR‐31 with 5‐FU drug resistance and clinical stages of colorectal tumors.
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Affiliation(s)
- Yoshihito Nakagawa
- Department of Gastroenterology, School of Medicine, Fujita Health University, Aichi, Japan
| | - Yuki Kuranaga
- The United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu, Japan
| | - Tomomitsu Tahara
- Department of Gastroenterology, School of Medicine, Fujita Health University, Aichi, Japan
| | - Hiromi Yamashita
- Department of Gastroenterology, School of Medicine, Fujita Health University, Aichi, Japan
| | - Tomoyuki Shibata
- Department of Gastroenterology, School of Medicine, Fujita Health University, Aichi, Japan
| | - Mitsuo Nagasaka
- Department of Gastroenterology, School of Medicine, Fujita Health University, Aichi, Japan
| | - Kohei Funasaka
- The United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu, Japan
| | - Naoki Ohmiya
- Department of Gastroenterology, School of Medicine, Fujita Health University, Aichi, Japan
| | - Yukihiro Akao
- The United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu, Japan
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16
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Prognostic Role of miR-221 and miR-222 Expression in Cancer Patients: A Systematic Review and Meta-Analysis. Cancers (Basel) 2019; 11:cancers11070970. [PMID: 31336701 PMCID: PMC6678869 DOI: 10.3390/cancers11070970] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 07/08/2019] [Indexed: 12/13/2022] Open
Abstract
Background: A wealth of evidence has shown that microRNAs (miRNAs) can modulate specific genes, increasing our knowledge on the fine-tuning regulation of protein expression. miR-221 and miR-222 have been frequently identified as deregulated across different cancer types; however, their prognostic significance in cancer remains controversial. In view of these considerations, we performed an updated systematic review and meta-analysis of published data investigating the effects of miR-221/222 on overall survival (OS) and other secondary outcomes among cancer patients. A systematic search of PubMed, Web of Knowledge, and Cochrane Library databases was performed. Hazard ratios (HRs) and 95% confidence intervals (95% CIs) were used to assess the strength of association. Results: Fifty studies, analyzing 6086 patients, were included in the systematic review. Twenty-five studies for miR-221 and 17 studies for miR-222 which assessed OS were included in the meta-analysis. High expression of miR-221 and miR-222 significantly predicted poor OS (HR: 1.48, 95% CI: 1.14–1.93, p = 0.003 and HR: 1.90, 95% CI: 1.43–2.54, p < 0.001, respectively). Subgroup analysis revealed that the finding on miR-221 was not as robust as the one on miR-222. Furthermore, high miR-222 expression was also associated with worse progression-free survival and disease-free survival pooled with recurrence-free survival. Conclusions: The meta-analysis demonstrated that high expression of miR-222 is associated with poor prognosis in cancer patients, whereas the significance of miR-221 remains unclear. More work is required to fully elucidate the role of miR-221 and miR-222 in cancer prognosis, particularly in view of the limitations of existing results, including the significant heterogeneity and limited number of studies for some cancers.
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17
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Huang J, Zhao M, Hu H, Wang J, Ang L, Zheng L. MicroRNA-130a reduces drug resistance in breast cancer. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2019; 12:2699-2705. [PMID: 31934100 PMCID: PMC6949573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 03/26/2019] [Indexed: 06/10/2023]
Abstract
OBJECTIVE Although the advent of chemotherapy has made some progress in the comprehensive treatment of breast cancer, drug resistance of tumor cells remains to be one of the main challenges for the treatment of breast cancers. Several microRNAs have been implicated in the resistant process, but the role of miR-130a in drug resistance in breast cancer remains unclear. The present study aims to investigate the role and mechanisms of miR-130a in drug resistance in breast cancer cells and tissues. PATIENTS AND METHODS miR-130a mimics was used to up-regulate miR-130a expression in Doxorubicin-resistant MCF-7/Adr breast cancer cell line, followed by MTT assay and colony formation to determine cell viability and relative colony number. The relationship between the expression of miR-130a and drug resistance was detected by in situ hybridization in the formalin-fixed paraffin-embedded (FFPE) tissues from 50 breast cancer patients before and after Epirubicin-based neoadjuvant chemotherapy. RESULTS Up-regulation of miR-130a level in MCF-7/Adr cells decreased the cell viability and colony number, and reversed Doxorubicin resistance of MCF-7/Adr cells. In breast cancer tissue from patients, the miR-130a level was lower before neoadjuvant chemotherapy than that after neoadjuvant chemotherapy (P < 0.05). Moreover, a significant increase in the expression of miR-130a was observed in breast tumor tissues from patients sensitive to neoadjuvant chemotherapy compared to the patients who were resistant to neoadjuvant chemotherapy (P < 0.05). CONCLUSION We concluded that miR-130a might weaken drug resistance of human breast cancer cells, and act as an important factor in prediction of therapeutic responses in chemotherapy of breast cancer.
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Affiliation(s)
- Jin Huang
- Department of Pathology, The Second People's Hospital of Hefei Hefei 230011, Anhui, China
| | - Min Zhao
- Department of Pathology, The Second People's Hospital of Hefei Hefei 230011, Anhui, China
| | - Hongguang Hu
- Department of Pathology, The Second People's Hospital of Hefei Hefei 230011, Anhui, China
| | - Jin Wang
- Department of Pathology, The Second People's Hospital of Hefei Hefei 230011, Anhui, China
| | - Lin Ang
- Department of Pathology, The Second People's Hospital of Hefei Hefei 230011, Anhui, China
| | - Li Zheng
- Department of Pathology, The Second People's Hospital of Hefei Hefei 230011, Anhui, China
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18
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Li Y, Li C, Li D, Yang L, Jin J, Zhang B. lncRNA KCNQ1OT1 enhances the chemoresistance of oxaliplatin in colon cancer by targeting the miR-34a/ATG4B pathway. Onco Targets Ther 2019; 12:2649-2660. [PMID: 31040703 PMCID: PMC6462170 DOI: 10.2147/ott.s188054] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Purpose The chemoresistance of colon cancer to oxaliplatin (L-OHP) indicates poor prognosis. Long non-coding RNA (lncRNA) KCNQ1OT1 (KCNQ1 opposite strand/antisense transcript 1) has been shown to participate in the tumorigenesis of several types of cancers. However, little is known about the role of KCNQ1OT1 in the chemoresistance and prognosis of colon cancer. Materials and methods Quantitative-PCR and Western blot were used to measure the expression profiles of KCNQ1OT1, miR-34a, and Atg4B in colon cancer tissues and cells. Cell viability assay and flow cytometry were used to examine their effects on cell proliferation and death. Cleavage of LC3 and GFP-LC3 plasmid transfection were used to detect autophagic activity. Double luciferase reporter assay was used to verify the interactions between miRNA and lncRNA or mRNA. Xenograft tumor model was used to verify the effects of KCNQ1OT1 in vivo. Results In this study, it is shown that the expression level of KCNQ1OT1 was increased in tumor, which indicated poor prognosis in colon cancer patients. Using colon cancer cell lines HCT116 and SW480, it was demonstrated that knockdown of KCNQ1OT1 decreased the cell viability and increased the apoptosis rates upon L-OHP treatment. Further studies indicated that Atg4B upregulation was partially responsible for KCNQ1OT1-induced protective autophagy and chemoresistance. Moreover, miR-34a functioned as a bridge between KCNQ1OT1 and Atg4B, which could be sponged by KCNQ1OT1, while it could also bind to the 3'-UTR of Atg4B and downregulate its expressions. Finally, we show that the KCNQ1OT1/miR-34a/Atg4B axis regulated the chemoresistance of colon cancer cells in vitro and in vivo. Conclusion lncRNA KCNQ1OT1 promoted the chemoresistance of colon cancer by sponging miR-34a, thus upregulating the expressions of Atg4B and enhancing protective autophagy. KCNQ1OT1 might become a promising target for colon cancer therapeutics.
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Affiliation(s)
- Yongchao Li
- Department of Gastrointestinal Surgery, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, China
| | - Changfeng Li
- Department of Endoscopy Center, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, China,
| | - Dandan Li
- Department of Endoscopy Center, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, China,
| | - Lei Yang
- Department of Endoscopy Center, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, China,
| | - Jingpeng Jin
- Department of Endoscopy Center, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, China,
| | - Bin Zhang
- Department of Endoscopy Center, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, China,
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Epsilon-Globin HBE1 Enhances Radiotherapy Resistance by Down-Regulating BCL11A in Colorectal Cancer Cells. Cancers (Basel) 2019; 11:cancers11040498. [PMID: 30965648 PMCID: PMC6521047 DOI: 10.3390/cancers11040498] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 03/27/2019] [Accepted: 04/02/2019] [Indexed: 12/28/2022] Open
Abstract
Resistance to radiotherapy is considered an important obstacle in the treatment of colorectal cancer. However, the mechanisms that enable tumor cells to tolerate the effects of radiation remain unclear. Moreover, radiotherapy causes accumulated mutations in transcription factors, which can lead to changes in gene expression and radiosensitivity. This phenomenon reduces the effectiveness of radiation therapy towards cancer cells. In the present study, radiation-resistant (RR) cancer cells were established by sequential radiation exposure, and hemoglobin subunit epsilon 1 (HBE1) was identified as a candidate radiation resistance-associated protein based on RNA-sequencing analysis. Then, compared to radiosensitive (RS) cell lines, the overexpression of HBE1 in RR cell lines was used to measure various forms of radiation-induced cellular damage. Consequently, HBE1-overexpressing cell lines were found to exhibit decreased radiation-induced intracellular reactive oxygen species (ROS) production and cell mortality. Conversely, HBE1 deficiency in RR cell lines increased intracellular ROS production, G2/M arrest, and apoptosis, and decreased clonogenic survival rate. These effects were reversed by the ROS scavenger N-acetyl cysteine. Moreover, HBE1 overexpression was found to attenuate radiation-induced endoplasmic reticulum stress and apoptosis via an inositol-requiring enzyme 1(IRE1)-Jun amino-terminal kinase (JNK) signaling pathway. In addition, increased HBE1 expression induced by γ-irradiation in RS cells attenuated expression of the transcriptional regulator BCL11A, whereas its depletion in RR cells increased BCL11A expression. Collectively, these observations indicate that the expression of HBE1 during radiotherapy might potentiate the survival of radiation-exposed colorectal cancer cells.
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20
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Zhang L, Li C, Cao L, Li H, Zou H, Li H, Pei H. microRNA-877 inhibits malignant progression of colorectal cancer by directly targeting MTDH and regulating the PTEN/Akt pathway. Cancer Manag Res 2019; 11:2769-2781. [PMID: 31114332 PMCID: PMC6497869 DOI: 10.2147/cmar.s194073] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 02/15/2019] [Indexed: 12/13/2022] Open
Abstract
Background: Recently, microRNA-877-5p (miR-877) was recognized as a cancer-associated miRNA in hepatocellular and renal cell carcinomas. However, little is known regarding its expression pattern and role in colorectal cancer (CRC) tumorigenesis. Material and methods: In the present study, reverse-transcription quantitative polymerase chain reaction was performed to detect miR-877 expression in CRC tissues and cell lines. A series of functional experiments were used to determine the effects of miR-877 upregulation on CRC cell proliferation, colony formation, apoptosis, migration, and invasion. In addition, the regulatory role of miR-877 in tumor growth was examined in vivo using a xenograft experiment. More importantly, the mechanisms underlying the action of miR-877 in CRC were explored. Results: A significant decrease in the expression of miR-877 was observed in CRC tissues and cell lines. Low miR-877 expression correlated with lymph node metastasis and TNM stage of CRC patients. Functional experiments revealed that ectopic expression of miR-877 suppressed CRC cell proliferation and colony formation ability, induced cell apoptosis, inhibited cell migration and invasion in vitro, and reduced tumor growth in vivo. Metadherin (MTDH) was recognized as a direct target of miR-877 in CRC cells. It was notably overexpressed in CRC tissues, and its expression was inversely correlated with that of miR-877 expression. Furthermore, MTDH knockdown simulated the tumor suppressor activity of miR-877 in CRC cells. MTDH restoration impaired the suppressive effects of miR-877 on malignant phenotypes of CRC cells. In addition, miR-877 inhibited the activation of the PTEN/Akt signaling pathway by regulating MTDH expression both in vitro and in vivo. Conclusion: Collectively, these results demonstrate that miR-877 inhibits the progression of CRC, at least partly by the direct targeting of MTDH and regulation of the PTEN/Akt pathway. Thus, miR-877 may serve as a potential therapeutic target for the treatment of patients with CRC.
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Affiliation(s)
- Lunqiang Zhang
- Department of Gastrointestinal Surgery, Xiangya Hospital, Central South University, Hunan 410008, People's Republic of China
| | - Chenglong Li
- Department of Gastrointestinal Surgery, Xiangya Hospital, Central South University, Hunan 410008, People's Republic of China
| | - Lijun Cao
- Department of Anesthesiology, The Second Xiangya Hospital of Central South University, Hunan 410011, People's Republic of China
| | - Hui Li
- Department of Anesthesiology, The Second Xiangya Hospital of Central South University, Hunan 410011, People's Republic of China
| | - Haiding Zou
- Department of Anesthesiology, The Second Xiangya Hospital of Central South University, Hunan 410011, People's Republic of China
| | - Hongqin Li
- Department of Anesthesiology, The Second Xiangya Hospital of Central South University, Hunan 410011, People's Republic of China
| | - Haiping Pei
- Department of Gastrointestinal Surgery, Xiangya Hospital, Central South University, Hunan 410008, People's Republic of China
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21
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Monteleone NJ, Moore AE, Iacona JR, Lutz CS, Dixon DA. miR-21-mediated regulation of 15-hydroxyprostaglandin dehydrogenase in colon cancer. Sci Rep 2019; 9:5405. [PMID: 30931980 PMCID: PMC6443653 DOI: 10.1038/s41598-019-41862-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 03/19/2019] [Indexed: 02/06/2023] Open
Abstract
Elevated prostaglandin E2 (PGE2) levels are observed in colorectal cancer (CRC) patients, and this increase is associated with poor prognosis. Increased synthesis of PGE2 in CRC has been shown to occur through COX-2-dependent mechanisms; however, loss of the PGE2-catabolizing enzyme, 15-hydroxyprostaglandin dehydrogenase (15-PGDH, HPGD), in colonic tumors contributes to increased prostaglandin levels and poor patient survival. While loss of 15-PGDH can occur through transcriptional mechanisms, we demonstrate that 15-PGDH can be additionally regulated by a miRNA-mediated mechanism. We show that 15-PGDH and miR-21 are inversely correlated in CRC patients, with increased miR-21 levels associating with low 15-PGDH expression. 15-PGDH can be directly regulated by miR-21 through distinct sites in its 3′ untranslated region (3′UTR), and miR-21 expression in CRC cells attenuates 15-PGDH and promotes increased PGE2 levels. Additionally, epithelial growth factor (EGF) signaling suppresses 15-PGDH expression while simultaneously enhancing miR-21 levels. miR-21 inhibition represses CRC cell proliferation, which is enhanced with EGF receptor (EGFR) inhibition. These findings present a novel regulatory mechanism of 15-PGDH by miR-21, and how dysregulated expression of miR-21 may contribute to loss of 15-PGDH expression and promote CRC progression via increased accumulation of PGE2.
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Affiliation(s)
- Nicholas J Monteleone
- Department of Microbiology, Biochemistry, & Molecular Genetics, Rutgers University - School of Graduate Studies, Newark, NJ, 07103, USA
| | | | - Joseph R Iacona
- Department of Microbiology, Biochemistry, & Molecular Genetics, Rutgers University - School of Graduate Studies, Newark, NJ, 07103, USA
| | - Carol S Lutz
- Department of Microbiology, Biochemistry, & Molecular Genetics, Rutgers University - School of Graduate Studies, Newark, NJ, 07103, USA.
| | - Dan A Dixon
- University of Kansas Cancer Center, Kansas City, KS, 66160, USA. .,Department of Molecular Biosciences, University of Kansas, Lawrence, KS, 66045, USA.
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22
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To KKW, Tong CWS, Wu M, Cho WCS. MicroRNAs in the prognosis and therapy of colorectal cancer: From bench to bedside. World J Gastroenterol 2018; 24:2949-2973. [PMID: 30038463 PMCID: PMC6054943 DOI: 10.3748/wjg.v24.i27.2949] [Citation(s) in RCA: 138] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 06/28/2018] [Accepted: 06/30/2018] [Indexed: 02/06/2023] Open
Abstract
MicroRNAs (miRNAs) are small, single-stranded, noncoding RNAs that can post-transcriptionally regulate the expression of various oncogenes and tumor suppressor genes. Dysregulated expression of many miRNAs have been shown to mediate the signaling pathways critical in the multistep carcinogenesis of colorectal cancer (CRC). MiRNAs are stable and protected from RNase-mediated degradation, thereby enabling its detection in biological fluids and archival tissues for biomarker studies. This review focuses on the role and application of miRNAs in the prognosis and therapy of CRC. While stage II CRC is potentially curable by surgical resection, a significant percentage of stage II CRC patients do develop recurrence. MiRNA biomarkers may be used to stratify such high-risk population for adjuvant chemotherapy to provide better prognoses. Growing evidence also suggests that miRNAs are involved in the metastatic process of CRC. Certain of these miRNAs may thus be used as prognostic biomarkers to identify patients more likely to have micro-metastasis, who could be monitored more closely after surgery and/or given more aggressive adjuvant chemotherapy. Intrinsic and acquired resistance to chemotherapy severely hinders successful chemotherapy in CRC treatment. Predictive miRNA biomarkers for response to chemotherapy may identify patients who will benefit the most from a particular regimen and also spare the patients from unnecessary side effects. Selection of patients to receive the new targeted therapy is becoming possible with the use of predictive miRNA biomarkers. Lastly, forced expression of tumor suppressor miRNA or silencing of oncogenic miRNA in tumors by gene therapy can also be adopted to treat CRC alone or in combination with other chemotherapeutic drugs.
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Affiliation(s)
- Kenneth KW To
- School of Pharmacy, Faculty of Medicine, the Chinese University of Hong Kong, Hong Kong, China
| | - Christy WS Tong
- School of Pharmacy, Faculty of Medicine, the Chinese University of Hong Kong, Hong Kong, China
| | - Mingxia Wu
- School of Pharmacy, Faculty of Medicine, the Chinese University of Hong Kong, Hong Kong, China
| | - William CS Cho
- Department of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong, China
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