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Wang J, Ma C, Tang Z, Sun Z, Qaed E, Chi X, Wang J, Jamalat Y, Geng Z, Tang Z, Yao Q. Mechanism study of oleanolic acid derivative, K73-03, inducing cell apoptosis in hepatocellular carcinoma. Cancer Cell Int 2024; 24:17. [PMID: 38185661 PMCID: PMC10771654 DOI: 10.1186/s12935-023-03119-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 10/30/2023] [Indexed: 01/09/2024] Open
Abstract
Oleanolic acid (3β-hydroxyolean-12-en-28-oic acid, OA) is a kind of pentacyclic triterpene, which widely distributes in nature. OA possesses a powerful anti-cancer effect; however, its low solubility limits its bioavailability and application. In this study, a new OA derivative, K73-03, was used to determine its effect on liver cancer cells and detailed molecular mechanisms. Here, we show that K73-03 may lead to the disorder of mitochondria in HepG2 cells, leading to excessive ROS production and apoptosis in cells. Meanwhile, K73-03 could induce cell apoptosis by inhibiting JAK2/STAT3 pathway and NF-κB/P65 pathway. Collectively, this study may provide a preliminary basis for further cancer treatment of hepatocellular carcinoma.
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Affiliation(s)
- Jiaqi Wang
- Department of Physiology, Dalian Medical University, Dalian, China
- Department of Plastic and Reconstructive Surgery, The First Hospital of Jilin University, Changchun, Jilin, 130000, China
| | - Chuchu Ma
- Department of Pharmacology, Dalian Medical University, Dalian, China
| | - Zhongyuan Tang
- Department of Orthodontics, College of Stomatology, Jilin University, Changchun, Jilin, 130033, P.R. China
| | - Zhengwu Sun
- Department of Pharmacology, Dalian Medical University, Dalian, China
| | - Eskandar Qaed
- Department of Pharmacology, Dalian Medical University, Dalian, China
| | - Xinming Chi
- Histology and Embryology Department, Dalian Medical University, Dalian, China
| | - Jun Wang
- Pathophysiology Department, Dalian Medical University, Dalian, China
| | - Yazeed Jamalat
- Department of Pharmacology, Dalian Medical University, Dalian, China
| | - Zhaohong Geng
- Department of Cardiology, 2th Affiliated Hospital of Dalian Medical University, Zhongshan Road No. 467, Dalian, 116000, China.
| | - Zeyao Tang
- Department of Pharmacology, Dalian Medical University, Dalian, China.
| | - Qiying Yao
- Department of Physiology, Dalian Medical University, Dalian, China.
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2
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Chen M, Xiao C, Jiang W, Yang W, Qin Q, Tan Q, Lian B, Liang Z, Wei C. Capsaicin Inhibits Proliferation and Induces Apoptosis in Breast Cancer by Down-Regulating FBI-1-Mediated NF-κB Pathway. DRUG DESIGN DEVELOPMENT AND THERAPY 2021; 15:125-140. [PMID: 33469265 PMCID: PMC7811378 DOI: 10.2147/dddt.s269901] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 12/09/2020] [Indexed: 01/15/2023]
Abstract
Background As a natural compound extracted from a variety of hot peppers, capsaicin has drawn increasing attention to its anti-cancer effects against multiple human cancers including breast cancer. FBI-1 is a major proto-oncogene negatively regulating the transcription of many tumor suppressor genes, and plays a vital role in tumorigenesis and progression. However, whether FBI-1 is involved in capsaicin-induced breast cancer suppression has yet to be ascertained. This study aimed to investigate the effects of capsaicin on proliferation and apoptosis and its association with FBI-1 expression in breast cancer. Methods CCK-8 and morphological observation assay were employed to detect cell proliferation. Flow cytometry and TUNEL assay were conducted to detect cell apoptosis. RNA interference technique was used to overexpress or silence FBI-1 expression. qRT-PCR and/or Western blot analysis were applied to detect the protein expression of FBI-1, Ki-67, Bcl-2, Bax, cleaved-Caspase 3, Survivin and NF-κB p65. Xenograft model in nude mice was established to assess the in vivo effects. Results Capsaicin significantly inhibited proliferation and induced apoptosis in breast cancer in vitro and in vivo, along with decreased FBI-1, Ki-67, Bcl-2 and Survivin protein expression, increased Bax protein expression and activated Caspase 3. Furthermore, FBI-1 overexpression obviously attenuated the capsaicin-induced anti-proliferation and pro-apoptosis effect, accompanied with the above-mentioned proteins reversed, whereas FBI-1 silencing generated exactly the opposite response. In addition, as a target gene of FBI-1, NF-κB was inactivated by p65 nuclear translocation suppressed with capsaicin treatment, which was perceptibly weakened with FBI-1 overexpression or enhanced with FBI-1 silencing. Conclusion This study reveals that FBI-1 is closely involved in capsaicin-induced anti-proliferation and pro-apoptosis of breast cancer. The underlying mechanism may be related to down-regulation of FBI-1-mediated NF-κB pathway. Targeting FBI-1 with capsaicin may be a promising therapeutic strategy in patients with breast cancer.
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Affiliation(s)
- Maojian Chen
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, Nanning, Guangxi 530021, People's Republic of China
| | - Chanchan Xiao
- Department of Microbiology and Immunology, School of Medicine and Public Health, Jinan University, Guangzhou, Guangdong, 510632, People's Republic of China
| | - Wei Jiang
- Department of Medical Oncology, Guangxi Medical University Cancer Hospital, Nanning, Guangxi 530021, People's Republic of China
| | - Weiping Yang
- Department of Ultrasound Diagnosis, Guangxi Medical University Cancer Hospital, Nanning, Guangxi 530021, People's Republic of China
| | - Qinghong Qin
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, Nanning, Guangxi 530021, People's Republic of China
| | - Qixing Tan
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, Nanning, Guangxi 530021, People's Republic of China
| | - Bin Lian
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, Nanning, Guangxi 530021, People's Republic of China
| | - Zhijie Liang
- Department of Gland Surgery, The Fifth Affiliated Hospital of Guangxi Medical University & The First People's Hospital of Nanning, Nanning, Guangxi 530022, People's Republic of China
| | - Changyuan Wei
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, Nanning, Guangxi 530021, People's Republic of China
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3
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Gupta S, Singh AK, Prajapati KS, Kushwaha PP, Shuaib M, Kumar S. Emerging role of ZBTB7A as an oncogenic driver and transcriptional repressor. Cancer Lett 2020; 483:22-34. [PMID: 32348807 DOI: 10.1016/j.canlet.2020.04.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 04/09/2020] [Accepted: 04/16/2020] [Indexed: 02/08/2023]
Abstract
ZBTB7A is a member of the POK family of transcription factors that possesses a POZ-domain at the N-terminus and Krüppel-like zinc-finger at the c-terminus. ZBTB7A was initially isolated as a protein that binds to the inducer of the short transcript of HIV-1 virus TAT gene promoter. The protein forms a homodimer through protein-protein interaction via the N-terminus POZ-domains. ZBTB7A typically binds to the DNA elements through its zinc-finger domains and represses transcription both by modification of the chromatin organization and through the direct recruitment of transcription factors to gene regulatory regions. ZBTB7A is involved in several fundamental biological processes including cell proliferation, differentiation, and development. It also participates in hematopoiesis, adipogenesis, chondrogenesis, cellular metabolism and alternative splicing of BCLXL, DNA repair, development of oligodendrocytes, osteoclast and unfolded protein response. Aberrant ZBTB7A expression promotes oncogenic transformation and tumor progression, but also maintains a tumor suppressive role depending on the type and genetic context of cancer. In this comprehensive review we provide information about the structure, function, targets, and regulators of ZBTB7A and its role as an oncogenic driver and transcriptional repressor in various human diseases.
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Affiliation(s)
- Sanjay Gupta
- Department of Urology, Case Western Reserve University, Cleveland, OH 44106, USA; The Urology Institute, University Hospitals Cleveland Medical Center, Cleveland, OH 44106, USA; Department of Nutrition, Case Western Reserve University, Cleveland, OH 44106, USA; Divison of General Medical Sciences, Case Comprehensive Cancer Center, Cleveland, OH 44106, USA; Department of Urology, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH 44106, USA.
| | - Atul Kumar Singh
- Department of Biochemistry, School of Basic and Applied Sciences, Central University of Punjab, Bathinda, 151001, India
| | - Kumari Sunita Prajapati
- Department of Biochemistry, School of Basic and Applied Sciences, Central University of Punjab, Bathinda, 151001, India
| | - Prem Prakash Kushwaha
- Department of Biochemistry, School of Basic and Applied Sciences, Central University of Punjab, Bathinda, 151001, India
| | - Mohd Shuaib
- Department of Biochemistry, School of Basic and Applied Sciences, Central University of Punjab, Bathinda, 151001, India
| | - Shashank Kumar
- Department of Biochemistry, School of Basic and Applied Sciences, Central University of Punjab, Bathinda, 151001, India.
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Mao A, Chen M, Qin Q, Liang Z, Jiang W, Yang W, Wei C. ZBTB7A promotes migration, invasion and metastasis of human breast cancer cells through NF-κB-induced epithelial-mesenchymal transition in vitro and in vivo. J Biochem 2019; 166:485-493. [PMID: 31385585 DOI: 10.1093/jb/mvz062] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Accepted: 08/02/2019] [Indexed: 12/13/2022] Open
Abstract
It has been generally confirmed that zinc finger and BTB domain containing 7A (ZBTB7A) plays an important role in the occurrence and progression of malignant tumours, but the promotion or inhibition effect is related to tumour type. The mechanism between ZBTB7A and breast cancer is not well understood, so further research is needed. In this study, we first investigated the expression of ZBTB7A in tissue samples of clinical breast cancer patients, MDA-MB-231, MCF-7 and MCF-10A cells. Second, we overexpressed the ZBTB7A in MCF-7 cells and silenced the ZBTB7A in MDA-MB-231 cells using lentivirus transfection technology, respectively, and verified the effect of ZBTB7A on migration and invasion of breast cancer cell lines through in vitro cell function experiments, such as wound-healing assay, migration and invasion assay, quantitative real time reverse transcriptase (qRT-PCR) and western blot. Then, the correlation between the above influences, epithelial-mesenchymal transition (EMT) and NF-κB was analysed. Finally, in vivo tumour transplantation model in nude mice was established to verified the effect of ZBTB7A on metastasis of breast cancer MDA-MB-231 cells. In conclusion, ZBTB7A is highly expressed in cancer tissue, breast cancer cell line MDA-MB-231 and MCF-7. Meanwhile, the high expression of ZBTB7A may promote cell migration, invasion and tumour metastasis, which may be related to EMT events by regulating NF-κB.
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Affiliation(s)
- Anyun Mao
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Qingxiu District, Nanning 530021, Guangxi Province, China
| | - Maojian Chen
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Qingxiu District, Nanning 530021, Guangxi Province, China
| | - Qinghong Qin
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Qingxiu District, Nanning 530021, Guangxi Province, China
| | - Zhijie Liang
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Qingxiu District, Nanning 530021, Guangxi Province, China
| | - Wei Jiang
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Qingxiu District, Nanning 530021, Guangxi Province, China
| | - Weiping Yang
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Qingxiu District, Nanning 530021, Guangxi Province, China
| | - Changyuan Wei
- Department of Breast Surgery, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Qingxiu District, Nanning 530021, Guangxi Province, China
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Liu S, Zheng B, Sheng Y, Kong Q, Jiang Y, Yang Y, Han X, Cheng L, Zhang Y, Han J. Identification of Cancer Dysfunctional Subpathways by Integrating DNA Methylation, Copy Number Variation, and Gene-Expression Data. Front Genet 2019; 10:441. [PMID: 31156704 PMCID: PMC6529853 DOI: 10.3389/fgene.2019.00441] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 04/29/2019] [Indexed: 12/29/2022] Open
Abstract
A subpathway is defined as the local region of a biological pathway with specific biological functions. With the generation of large-scale sequencing data, there are more opportunities to study the molecular mechanisms of cancer development. It is necessary to investigate the potential impact of DNA methylation, copy number variation (CNV), and gene-expression changes in the molecular states of oncogenic dysfunctional subpathways. We propose a novel method, Identification of Cancer Dysfunctional Subpathways (ICDS), by integrating multi-omics data and pathway topological information to identify dysfunctional subpathways. We first calculated gene-risk scores by integrating the three following types of data: DNA methylation, CNV, and gene expression. Second, we performed a greedy search algorithm to identify the key dysfunctional subpathways within pathways for which the discriminative scores were locally maximal. Finally, a permutation test was used to calculate the statistical significance level for these key dysfunctional subpathways. We validated the effectiveness of ICDS in identifying dysregulated subpathways using datasets from liver hepatocellular carcinoma (LIHC), head-neck squamous cell carcinoma (HNSC), cervical squamous cell carcinoma, and endocervical adenocarcinoma. We further compared ICDS with methods that performed the same subpathway identification algorithm but only considered DNA methylation, CNV, or gene expression (defined as ICDS_M, ICDS_CNV, or ICDS_G, respectively). With these analyses, we confirmed that ICDS better identified cancer-associated subpathways than the three other methods, which only considered one type of data. Our ICDS method has been implemented as a freely available R-based tool (https://cran.r-project.org/web/packages/ICDS).
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Affiliation(s)
- Siyao Liu
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Baotong Zheng
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Yuqi Sheng
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Qingfei Kong
- College of Basic Medical Science, Harbin Medical University, Harbin, China
| | - Ying Jiang
- College of Basic Medical Science, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Yang Yang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Xudong Han
- College of Basic Medical Science, Harbin Medical University, Harbin, China
| | - Liang Cheng
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Yunpeng Zhang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Junwei Han
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
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6
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Wang Z, Zhao X, Wang W, Liu Y, Li Y, Gao J, Wang C, Zhou M, Liu R, Xu G, Zhou Q. ZBTB7 evokes 5-fluorouracil resistance in colorectal cancer through the NF‑κB signaling pathway. Int J Oncol 2018; 53:2102-2110. [PMID: 30106136 DOI: 10.3892/ijo.2018.4521] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 02/20/2018] [Indexed: 11/05/2022] Open
Abstract
Zinc finger and BTB domain containing 7A (ZBTB7), a POZ/BTB and Krüppel erythroid myeloid oncogenic factor, is critical for the tumorigenicity and progression of various cancer types. ZBTB7 has been reported to promote the cell proliferation of colorectal cancers (CRC). However, the function of ZBTB7 to 5-fluorouracil (5‑FU) resistance has not yet been studied. In the current study, ZBTB7 expression and function in 5‑FU resistance in CRC were investigated using with multidisciplinary approaches, including western blot analysis, Transwell assay, CCK8 and a tumor xenograft model. Overexpression of ZBTB7 was increased the level of proteins associated with cell invasion and epithelial-mesenchymal transition. ZBTB7 inhibition attenuated the invasion and enhanced the apoptosis of CRC cells. IC50 values and cell viability were significantly reduced in cells with short hairpin RNA (shRNA)-mediated ZBTB7 depletion compared with the control group. 5‑FU administration decreased viability to a greater extent in the ZBTB7-shRNA group compared with the control, which was dose- and time-dependent. Analysis of gene expression omnibus data demonstrated that ZBTB7 mediated 5‑FU resistance, potentially through nuclear factor (NF)-κB signaling. NF‑κB inhibitor SN50 reversed ZBTB7-induced resistance in CRC. Collectively, the findings demonstrated that ZBTB7 mediated 5‑FU resistance in CRC cells through NF‑κB signaling. Thus, targeting ZBTB7 and NF‑κB signaling may be an effective strategy to reverse 5‑FU resistance in CRC.
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Affiliation(s)
- Zexin Wang
- Department of Oncology, Chongqing Fuling Central Hospital, Chongqing 408099, P.R. China
| | - Xilan Zhao
- Department of Oncology, Chongqing Fuling Central Hospital, Chongqing 408099, P.R. China
| | - Wei Wang
- Department of Oncology, Chongqing Fuling Central Hospital, Chongqing 408099, P.R. China
| | - Yishu Liu
- Department of Oncology, Chongqing Fuling Central Hospital, Chongqing 408099, P.R. China
| | - Yanyan Li
- Department of Oncology, Chongqing Fuling Central Hospital, Chongqing 408099, P.R. China
| | - Junyong Gao
- Department of Oncology, Chongqing Fuling Central Hospital, Chongqing 408099, P.R. China
| | - Cancan Wang
- Department of Oncology, Chongqing Fuling Central Hospital, Chongqing 408099, P.R. China
| | - Meiyu Zhou
- Department of Oncology, Chongqing Fuling Central Hospital, Chongqing 408099, P.R. China
| | - Ruyan Liu
- Department of Oncology, Chongqing Fuling Central Hospital, Chongqing 408099, P.R. China
| | - Guofa Xu
- Department of Oncology, Chongqing Fuling Central Hospital, Chongqing 408099, P.R. China
| | - Qi Zhou
- Department of Oncology, Chongqing Fuling Central Hospital, Chongqing 408099, P.R. China
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7
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Liu X, Tian S, Liu M, Jian L, Zhao L. Wogonin inhibits the proliferation and invasion, and induces the apoptosis of HepG2 and Bel7402 HCC cells through NF‑κB/Bcl-2, EGFR and EGFR downstream ERK/AKT signaling. Int J Mol Med 2016; 38:1250-6. [PMID: 27499272 DOI: 10.3892/ijmm.2016.2700] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 07/05/2016] [Indexed: 11/06/2022] Open
Abstract
The anticancer effects of the natural flavonoid, wogonin, have been reported. However, its molecular mechanisms of action have not yet been fully explored. In the present study, we aimed to examine the molecular mechanisms of action of wogonin and its effects on the biological behavior of the HepG2 and Bel7402 hepatocellular carcinoma (HCC) cell lines. We also examined the effects of wogonin on nuclear factor-κB (NF-κB)/Bcl-2 and epidermal growth factor receptor (EGFR) signaling, as well as on downstream pathways of EGFR, namely extracellular signal-regulated kinase (ERK)/AKT signaling. We found that treatment with wogonin inhibited the proliferation and invasion, and induced the apoptosis of the HepG2 and Bel7402 cells. In addition, treatment with wogonin decreased cyclin D1, cyclin E, CDK4/6, Bcl-2 and matrix metalloproteinase 2 (MMP2) expression, and promoted the cleavage of caspase-3 and caspase-9 in a concentration-dependent manner. Further experiments revealed that wogonin inhibited NF-κB/Bcl-2 signaling by decreasing the IκB and p65 phosphorylation levels. Wogonin also inhibited the activation of the EGFR (Tyr845) signaling pathway, and that of downstream pathways of EGFR, namely ERK/AKT/MMP2 signaling. The depletion of EGFR by siRNA partly abolished the inhibitory effects of wogonin on cyclin D1, MMP2 expression. On the whole, our our findings demonstrate that wogonin effectively suppresses the proliferation, invasion and survival of HCC cells through the modulation of the NF-κB and EGFR signaling pathways.
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Affiliation(s)
- Xiaodong Liu
- Department of Pharmacy, Shengjing Hospital of China Medical University, Shenyang, Liaoning, P.R. China
| | - Shuo Tian
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Mei Liu
- Department of Pharmacy, Shengjing Hospital of China Medical University, Shenyang, Liaoning, P.R. China
| | - Lingyan Jian
- Department of Pharmacy, Shengjing Hospital of China Medical University, Shenyang, Liaoning, P.R. China
| | - Limei Zhao
- Department of Pharmacy, Shengjing Hospital of China Medical University, Shenyang, Liaoning, P.R. China
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8
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Chai X, Han Y, Yang J, Zhao X, Liu Y, Hou X, Tang Y, Zhao S, Li X. Identification of the transcriptional regulators by expression profiling infected with hepatitis B virus. Clin Res Hepatol Gastroenterol 2016; 40:57-72. [PMID: 26119596 DOI: 10.1016/j.clinre.2015.04.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Revised: 12/18/2014] [Accepted: 04/28/2015] [Indexed: 02/07/2023]
Abstract
BACKGROUND The molecular pathogenesis of infection by hepatitis B virus with human is extremely complex and heterogeneous. To date the molecular information is not clearly defined despite intensive research efforts. Thus, studies aimed at transcription and regulation during virus infection or combined researches of those already known to be beneficial are needed. AIMS With the purpose of identifying the transcriptional regulators related to infection of hepatitis B virus in gene level, the gene expression profiles from some normal individuals and hepatitis B patients were analyzed in our study. METHODS In this work, the differential expressed genes were selected primarily. The several genes among those were validated in an independent set by qRT-PCR. Then the differentially co-expression analysis was conducted to identify differentially co-expressed links and differential co-expressed genes. Next, the analysis of the regulatory impact factors was performed through mapping the links and regulatory data. In order to give a further insight to these regulators, the co-expression gene modules were identified using a threshold-based hierarchical clustering method. Incidentally, the construction of the regulatory network was generated using the computer software. RESULTS A total of 137,284 differentially co-expressed links and 780 differential co-expressed genes were identified. These co-expressed genes were significantly enriched inflammatory response. The results of regulatory impact factors revealed several crucial regulators related to hepatocellular carcinoma and other high-rank regulators. Meanwhile, more than one hundred co-expression gene modules were identified using clustering method. CONCLUSIONS In our study, some important transcriptional regulators were identified using a computational method, which may enhance the understanding of disease mechanisms and lead to an improved treatment of hepatitis B. However, further experimental studies are required to confirm these findings.
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Affiliation(s)
- Xiaoqiang Chai
- College of Life Sciences, Sichuan University, Ministry of Education Key Laboratory for Bio-resource and Eco-environment, Sichuan Key Laboratory of Molecular Biology and Biotechnology, 610064 Chengdu, PR China
| | - Yanan Han
- College of Life Sciences, Sichuan University, Ministry of Education Key Laboratory for Bio-resource and Eco-environment, Sichuan Key Laboratory of Molecular Biology and Biotechnology, 610064 Chengdu, PR China
| | - Jian Yang
- College of Life Sciences, Sichuan University, Ministry of Education Key Laboratory for Bio-resource and Eco-environment, Sichuan Key Laboratory of Molecular Biology and Biotechnology, 610064 Chengdu, PR China
| | - Xianxian Zhao
- College of Life Sciences, Sichuan University, Ministry of Education Key Laboratory for Bio-resource and Eco-environment, Sichuan Key Laboratory of Molecular Biology and Biotechnology, 610064 Chengdu, PR China
| | - Yewang Liu
- College of Life Sciences, Sichuan University, Ministry of Education Key Laboratory for Bio-resource and Eco-environment, Sichuan Key Laboratory of Molecular Biology and Biotechnology, 610064 Chengdu, PR China
| | - Xugang Hou
- College of Life Sciences, Sichuan University, Ministry of Education Key Laboratory for Bio-resource and Eco-environment, Sichuan Key Laboratory of Molecular Biology and Biotechnology, 610064 Chengdu, PR China
| | - Yiheng Tang
- College of Life Sciences, Sichuan University, Ministry of Education Key Laboratory for Bio-resource and Eco-environment, Sichuan Key Laboratory of Molecular Biology and Biotechnology, 610064 Chengdu, PR China
| | - Shirong Zhao
- College of Life Sciences, Sichuan University, Ministry of Education Key Laboratory for Bio-resource and Eco-environment, Sichuan Key Laboratory of Molecular Biology and Biotechnology, 610064 Chengdu, PR China
| | - Xiao Li
- College of Life Sciences, Sichuan University, Ministry of Education Key Laboratory for Bio-resource and Eco-environment, Sichuan Key Laboratory of Molecular Biology and Biotechnology, 610064 Chengdu, PR China.
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9
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Hong X, Hong XY, Li T, He CY. Pokemon and MEF2D co-operationally promote invasion of hepatocellular carcinoma. Tumour Biol 2015; 36:9885-93. [PMID: 26164003 DOI: 10.1007/s13277-015-3744-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2015] [Accepted: 06/30/2015] [Indexed: 11/28/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is one of the most deadly human malignancy, and frequent invasion and metastasis is closely associated with its poor prognosis. However, the molecular mechanism underlying HCC invasion is still not completely elucidated. Pokemon is a well-established oncogene for HCC growth, but its contribution to HCC invasion has not been studied yet. In this paper, Pokemon was found to be overexpressed in MHCC-97H HCC cell line, which possesses higher invasiveness. Downregulation of Pokemon abolished the invasion of MHCC-97H HCC cell lines. Pokemon overexpression was able to enhance the invasion of MHCC-97L cells with lower invasiveness. MEF2D, an oncogene promoting the invasion of HCC cells, was further detected to be upregulated and downregulated when Pokemon was overexpressed and silenced, respectively. Online database analysis indicated that one Pokemon recognition site was located within the promoter of MEF2D. Chromatin co-precipitation, luciferase, and qPCR assays all proved that Pokemon can promote the expression of MEF2D in HCC cells. Restoration of MEF2D expression can prevent the impaired invasion of HCC cells with Pokemon silencing, while suppression of MEF2D abolished the effect of Pokemon overexpression on HCC invasion. More interestingly, MEF2D was also found to increase the transcription of Pokemon by binding myocyte enhancer factor 2 (MEF2) sites within its promoter region, implying an auto-regulatory circuit consisting of these two oncogenes that can promote HCC invasion. Our findings can contribute to the understanding of molecular mechanism underlying HCC invasion, and provided evidence that targeting this molecular loop may be a promising strategy for anti-invasion therapy.
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Affiliation(s)
- Xin Hong
- Department of Vascular Surgery, China-Japan Union Hospital of Jilin University, Chang Chun, 130031, China
| | - Xing-Yu Hong
- Department of Vascular Surgery, China-Japan Union Hospital of Jilin University, Chang Chun, 130031, China
| | - Tao Li
- Department of Anesthesiology, China-Japan Union Hospital of Jilin University, Chang Chun, 130031, China
| | - Cheng-Yan He
- Department of Pathology and Pathophysiology, China-Japan Union Hospital of Jilin University, Chang Chun, 130031, China.
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10
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Zhao GT, Yang LJ, Li XX, Cui HL, Guo R. Expression of the proto-oncogene Pokemon in colorectal cancer--inhibitory effects of an siRNA. Asian Pac J Cancer Prev 2014; 14:4999-5005. [PMID: 24175766 DOI: 10.7314/apjcp.2013.14.9.4999] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE This study aimed to investigate expression of the proto-oncogene POK erythroid myeloid ontogenic factor (Pokemon) in colorectal cancer (CRC), and assess inhibitory effects of a small interference RNA (siRNA) expression vector in SW480 and SW620 cells. METHODS Semi-quantitative reverse transcription-polymerase chain reaction (PCR) and immunohistochemistry were performed to determine mRNA and protein expression levels of Pokemon in CRC tissues. Indirect immunofluorescence staining was applied to investigate the location of Pokemon in SW480 and SW620 cells. The siRNA expression vectors that were constructed to express a short hairpin RNA against Pokemon were transfected to the SW480 and SW620 cells with a liposome. Expression levels of Pokemon mRNA and protein were examined by real-time quantitative-fluorescent PCR and western blot analysis. The effects of Pokemon silencing on proliferation of SW480 and SW620 cells were evaluated with reference to growth curves with MTT assays. RESULTS The mRNA expression level of Pokemon in tumor tissues (0.845 ± 0.344) was significantly higher than that in adjacent tumor specimens (0.321 ± 0.197). The positive expression ratio of Pokemon protein in CRC (87.0%) was significantly higher than that in the adjacent tissues (19.6%). Strong fluorescence staining of Pokemon protein was observed in the cytoplasm of the SW480 and SW620 cells. The inhibition ratios of Pokemon mRNA and protein in the SW480 cells were 83.1% and 73.5% at 48 and 72 h, respectively, compared with those of the negative control cells with the siRNA. In the SW620 cells, the inhibition ratios of Pokemon mRNA and protein were 76.3% and 68.7% at 48 and 72 h, respectively. MTT showed that Pokemon gene silencing inhibited the proliferation of SW480 and SW620 cells. CONCLUSION Overexpression of Pokemon in CRC may have a function in carcinogenesis and progression. siRNA expression vectors could effectively inhibit mRNA and protein expression of Pokemon in SW480 and SW620 cells, thereby reducing malignant cell proliferation.
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Affiliation(s)
- Gan-Ting Zhao
- Department of Gastroenterology, Heping Hospital of Changzhi Medical College, Changzhi, China E-mail :
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Pokemon enhances proliferation, cell cycle progression and anti-apoptosis activity of colorectal cancer independently of p14ARF–MDM2–p53 pathway. Med Oncol 2014; 31:288. [DOI: 10.1007/s12032-014-0288-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2014] [Accepted: 10/09/2014] [Indexed: 02/07/2023]
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Hocsak E, Cseh A, Szabo A, Bellyei S, Pozsgai E, Kalai T, Hideg K, Sumegi B, Boronkai A. PARP inhibitor attenuated colony formation can be restored by MAP kinase inhibitors in different irradiated cancer cell lines. Int J Radiat Biol 2014; 90:1152-61. [PMID: 24937370 DOI: 10.3109/09553002.2014.934927] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
UNLABELLED Abstract Purpose: Sensitizing cancer cells to irradiation is a major challenge in clinical oncology. We aimed to define the signal transduction pathways involved in poly(ADP-ribose) polymerase (PARP) inhibitor-induced radiosensitization in various mammalian cancer lines. MATERIALS AND METHODS Clonogenic survival assays and Western blot examinations were performed following telecobalt irradiation of cancer cells in the presence or absence of various combinations of PARP- and selective mitogen-activated protein kinase (MAPK) inhibitors. RESULTS HO3089 resulted in significant cytotoxicity when combined with irradiation. In human U251 glioblastoma and A549 lung cancer cell lines, Erk1/2 and JNK/SAPK were found to mediate this effect of HO3089 since inhibitors of these kinases ameliorated it. In murine 4T1 breast cancer cell line, p38 MAPK rather than Erk1/2 or JNK/SAPK was identified as the main mediator of HO3089's radiosensitizing effect. Besides the aforementioned changes in kinase signaling, we detected increased p53, unchanged Bax and decreased Bcl-2 expression in the A549 cell line. CONCLUSIONS HO3089 sensitizes cancer cells to photon irradiation via proapoptotic processes where p53 plays a crucial role. Activation of MAPK pathways is regarded the consequence of irradiation-induced DNA damage, thus their inhibition can counteract the radiosenzitizing effect of the PARP inhibitor.
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Affiliation(s)
- Eniko Hocsak
- Department of Biochemistry and Medical Chemistry, Medical School, University of Pecs , Hungary
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