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Liu J, Chou Z, Li C, Huang K, Wang X, Li X, Han C, Al-Danakh A, Li X, Song X. ZBTB7A, a miR-144-3p targeted gene, accelerates bladder cancer progression via downregulating HIC1 expression. Cancer Cell Int 2022; 22:179. [PMID: 35501800 PMCID: PMC9063087 DOI: 10.1186/s12935-022-02596-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 04/18/2022] [Indexed: 12/24/2022] Open
Abstract
Background Zinc finger and BTB domain-containing 7A (ZBTB7A) is a member of the POK family of transcription factors that plays an oncogenic or tumor-suppressive role in different cancers depending on the type and genetic context of cancer. However, the function and molecular mechanism of ZBTB7A in bladder cancer (BC) remain elusive. Methods The role of ZBTB7A in bladder cancer was detected by colony formation, transwell, and tumor formation assays. The expression levels of ZBTB7A, HIC1, and miR-144-3p were analyzed by qRT-PCR and Western blot. Bioinformatics analysis and a dual-luciferase reporter assay were used to assess the effect of ZBTB7A on the promoter activity of HIC1. Results The present study revealed that knockdown of ZBTB7A suppressed BC cell growth and migration, as indicated by an approximately 50% reduction in the number of colonies and an approximately 70% reduction in the number of migrated cells. Loss of ZBTB7A inhibited tumor growth in vivo, resulting in a 75% decrease in tumor volume and an 80% decrease in tumor weight. Further mechanistic studies revealed that ZBTB7A bound to the hypermethylated in cancer 1 (HIC1) promoter and downregulated HIC1 expression, accelerating the malignant behavior of BC. Increased expression of ZBTB7A in BC tissues was negatively corrected with the expression of HIC1. Moreover, ZBTB7A was a target of miR-144-3p, which decreased ZBTB7A expression in BC. Conclusion Our data demonstrate that ZBTB7A, a targeted gene of miR-144-3p, promoted tumorigenesis of BC through downregulating HIC1 expression. Supplementary Information The online version contains supplementary material available at 10.1186/s12935-022-02596-w.
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Affiliation(s)
- Junqiang Liu
- Department of Urology of First Affiliated Hospital, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
| | - Zhiyuan Chou
- Department of Urology of First Affiliated Hospital, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
| | - Chun Li
- Central Laboratory, Affiliated Zhongshan Hospital of Dalian University, Dalian, China
| | - Kai Huang
- Department of Urology of First Affiliated Hospital, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
| | - Xuejian Wang
- Department of Urology of First Affiliated Hospital, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
| | - Xiunan Li
- Department of Urology of First Affiliated Hospital, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
| | - Chuanchun Han
- Department of Urology of First Affiliated Hospital, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
| | - Abdullah Al-Danakh
- Department of Urology of First Affiliated Hospital, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
| | - Xiaodong Li
- Department of Urology of First Affiliated Hospital, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China.
| | - Xishuang Song
- Department of Urology of First Affiliated Hospital, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China.
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Jiang F, Zheng Q, Chang L, Li X, Wang X, Gu X. Pro-oncogene Pokemon Promotes Prostate Cancer Progression by Inducing STRN4 Expression. J Cancer 2019; 10:1833-1845. [PMID: 31205540 PMCID: PMC6547993 DOI: 10.7150/jca.29471] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Accepted: 03/04/2019] [Indexed: 11/07/2022] Open
Abstract
Pokemon, also known as leukemia/lymphoma-related factor (LRF) is a pro-oncogenic protein highly expressed in several cancers. There have been few in vitro and animal studies about its malignant biological behavior and function, however, its role especially in prostate cancer has not been completely elucidated. Therefore, in this study, we identified that Pokemon is overexpressed in human prostate cancer tissue samples, and its suppression inhibits proliferation of prostate cancer cells, along with promotion of apoptosis. Furthermore, to explore the mechanism by which Pokemon promotes tumor progression, we observed that it binds to the promoter of STRN4 (striatin 4), a downstream target, and subsequently regulates its expression. In conclusion, our study indicated that Pokemon through stimulation of STRN4 expression promotes prostate tumor progression via a Pokemon /STRN4 axis.
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Affiliation(s)
- Fuquan Jiang
- Department of Urology, China-Japan Union Hospital of Jilin University, Jilin, China
| | - Qingfan Zheng
- Department of Urology, China-Japan Union Hospital of Jilin University, Jilin, China
| | - Liping Chang
- The First Affiliated Hospital, Changchun University of Chinese Traditional Medicine, Jilin, China
| | - Xu Li
- Department of Urology, China-Japan Union Hospital of Jilin University, Jilin, China
| | - Xinsheng Wang
- Department of Urology, Tianjin First Center Hospital, Tianjin, China
| | - Xinquan Gu
- Department of Urology, China-Japan Union Hospital of Jilin University, Jilin, China
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3
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Guo C, Xiong D, Yang B, Zhang H, Gu W, Liu M, Yao X, Zheng J, Peng B. The expression and clinical significance of ZBTB7 in transitional cell carcinoma of the bladder. Oncol Lett 2017; 14:4857-4862. [PMID: 29085492 DOI: 10.3892/ol.2017.6814] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 06/27/2017] [Indexed: 11/06/2022] Open
Abstract
Zinc finger and BTB domain containing 7A (ZBTB7) is a ZBTB protein family member of transcriptional repressors that serves a critical role in cell transformation and malignancy. However, the association between ZBTB7 expression in bladder cancer tissues and the prognosis of patients remains unclear. The aim of the current study was to detect the expression of ZBTB7 in transitional cell carcinoma (TCC) of the bladder and normal bladder mucous tissues to evaluate the diagnostic and prognostic value of ZBTB7 in TCC of the bladder. A total of 100 TCC specimens were analyzed and the expression of ZBTB7 mRNA was examined via reverse transcription-quantitative polymerase chain reaction. The expression of ZBTB7 protein was examined by western blotting and immunohistochemistry. The association between ZBTB7 expression and the clinical prognosis of patients from the TCGA database was analyzed. High expression of ZBTB7 mRNA and protein in TCC tissue was detected and TCC expression was significantly higher in TCC tissue than in normal bladder mucous tissues (P<0.05). Furthermore, ZBTB7 expression was associated with recurrence, a larger tumor size and higher tumor grade. In terms of overall and recurrence-free survival, the group expressing high levels of ZBTB7 exhibited lower overall and recurrence-free survival compared with the low ZBTB7 expression group, although these differences were not statistically significant. Therefore, ZBTB7 may be important in the initiation and progression of TCC.
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Affiliation(s)
- Changcheng Guo
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Dabo Xiong
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Bin Yang
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Haiming Zhang
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Wenyu Gu
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Min Liu
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Xudong Yao
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Junhua Zheng
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Bo Peng
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
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4
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Shen Y, Cao R, Liu W, Zhou Y, Wu Y, Tan J, Jin M, Zhong J, Zhang Q, Liu J, Zu X. Negative feedback loop between ZBTB7A and TGF-β in breast cancer. Oncol Lett 2017; 14:1403-1410. [PMID: 28789356 PMCID: PMC5529933 DOI: 10.3892/ol.2017.6291] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 04/04/2017] [Indexed: 01/05/2023] Open
Abstract
Zinc finger and BTB domain containing 7A (ZBTB7A) is aberrantly expressed in breast cancer, but the involvement of ZBTB7A in breast cancer remains controversial. Transforming growth factor-β (TGF-β) is a pleiotropic cytokine which promotes breast cancer metastasis. ZBTB7A and TGF-β are important factors in tumor development. However, the association between ZBTB7A and TGF-β in breast cancer remains unknown. The results of the present study revealed that TGF-β1 induced the expression of ZBTB7A via the phosphoinositide 3-kinase-protein kinase B signaling pathway in human breast cancer cells, and ZBTB7A inhibited the expression of TGF-β1 through indirectly suppressing the promoter activity of TGF-β1. Furthermore, no significant correlation between the expression of ZBTB7A and TGF-β1 were identified in breast cancer tissues using tissue microarray assay and human cancer genomics analysis. These results have identified a negative feedback loop between ZBTB7A and TGF-β signaling, suggesting ZBTB7A as a potential modulator of breast cancer metastasis. Thus, the results of the present study suggested that ZBTB7A is a potential prognostic biomarker for breast cancer.
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Affiliation(s)
- Yingying Shen
- Institute of Clinical Medicine, The First Affiliated Hospital of The University of South China, Hengyang, Hunan 421001, P.R. China
| | - Renxian Cao
- Institute of Clinical Medicine, The First Affiliated Hospital of The University of South China, Hengyang, Hunan 421001, P.R. China.,Department of Metabolism and Endocrinology, The First Affiliated Hospital of The University of South China, Hengyang, Hunan 421001, P.R. China
| | - Wen Liu
- Department of Metabolism and Endocrinology, The First Affiliated Hospital of The University of South China, Hengyang, Hunan 421001, P.R. China
| | - Yuqing Zhou
- Department of Metabolism and Endocrinology, The First Affiliated Hospital of The University of South China, Hengyang, Hunan 421001, P.R. China
| | - Ying Wu
- Institute of Clinical Medicine, The First Affiliated Hospital of The University of South China, Hengyang, Hunan 421001, P.R. China
| | - Jingjing Tan
- Department of Metabolism and Endocrinology, The First Affiliated Hospital of The University of South China, Hengyang, Hunan 421001, P.R. China
| | - Min Jin
- Department of Metabolism and Endocrinology, The First Affiliated Hospital of The University of South China, Hengyang, Hunan 421001, P.R. China
| | - Jing Zhong
- Institute of Clinical Medicine, The First Affiliated Hospital of The University of South China, Hengyang, Hunan 421001, P.R. China
| | - Qinghai Zhang
- Institute of Clinical Medicine, The First Affiliated Hospital of The University of South China, Hengyang, Hunan 421001, P.R. China
| | - Jianghua Liu
- Institute of Clinical Medicine, The First Affiliated Hospital of The University of South China, Hengyang, Hunan 421001, P.R. China.,Department of Metabolism and Endocrinology, The First Affiliated Hospital of The University of South China, Hengyang, Hunan 421001, P.R. China
| | - Xuyu Zu
- Institute of Clinical Medicine, The First Affiliated Hospital of The University of South China, Hengyang, Hunan 421001, P.R. China
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5
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LncRNA CCAT2 promotes tumorigenesis by over-expressed Pokemon in non-small cell lung cancer. Biomed Pharmacother 2017; 87:692-697. [DOI: 10.1016/j.biopha.2016.12.122] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 12/27/2016] [Indexed: 11/18/2022] Open
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6
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Yang Y, Cui J, Xue F, Overstreet AM, Zhan Y, Shan D, Li H, Li H, Wang Y, Zhang M, Yu C, Xu ZQD. Resveratrol Represses Pokemon Expression in Human Glioma Cells. Mol Neurobiol 2015; 53:1266-1278. [PMID: 25875864 DOI: 10.1007/s12035-014-9081-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 12/29/2014] [Indexed: 01/10/2023]
Abstract
POK erythroid myeloid ontogenic factor (Pokemon), an important proto-oncoprotein, is a transcriptional repressor that regulates the expression of many genes and plays an important role in tumorigenesis. Resveratrol (RSV), a natural polyphenolic compound, has many beneficial biological effects on health. In this study, we investigated the role of Pokemon in RSV-induced biological effects and the effect of RSV on the expression of Pokemon in glioma cells. We found that overexpression of Pokemon decreased RSV-induced cell apoptosis, senescence, and anti-proliferative effects. Moreover, we showed that RSV could efficiently decrease the activity of the Pokemon promoter and the expression of Pokemon. Meanwhile, RSV also inhibited Sp1 DNA binding activity to the Pokemon promoter; whereas, it did not influence the expression and nuclear translocation of Sp1. In addition, we found that RSV could increase the recruitment of HDAC1, but decreased p300 to the Pokemon promoter. Taken together, all these results extended our understanding on the anti-cancer mechanism of RSV in glioma cells.
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Affiliation(s)
- Yutao Yang
- Department of Neurobiology, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Laboratory of Brain Disorders (MOST), Beijing Institute for Brain Disorders, Capital Medical University, Beijing, 100069, China.
| | - Jiajun Cui
- Department of Cancer and Cell Biology, University of Cincinnati College of Medicine, Cincinnati, OH, 45267, USA
| | - Feng Xue
- Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
| | - Anne-Marie Overstreet
- Department of Cancer and Cell Biology, University of Cincinnati College of Medicine, Cincinnati, OH, 45267, USA
| | - Yiping Zhan
- Department of Neurosurgery, Beijing Sanbo Brain Hospital, Capital Medical University, Beijing, 100093, China.,Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Dapeng Shan
- Third Institute of Oceanography, State Oceanic Administration, Xiamen, 361005, China
| | - Hui Li
- Department of Molecular and Biomedical Pharmacology, University of Kentucky College of Medicine, Lexington, KY, 40536, USA
| | - Hui Li
- Department of Neurobiology, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Laboratory of Brain Disorders (MOST), Beijing Institute for Brain Disorders, Capital Medical University, Beijing, 100069, China
| | | | - Mengmeng Zhang
- Jiaxing Entry-Exit Inspection and Quarantine, Jiaxing, 314001, China
| | - Chunjiang Yu
- Department of Neurosurgery, Beijing Sanbo Brain Hospital, Capital Medical University, Beijing, 100093, China
| | - Zhi-Qing David Xu
- Department of Neurobiology, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Laboratory of Brain Disorders (MOST), Beijing Institute for Brain Disorders, Capital Medical University, Beijing, 100069, China.
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7
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Sartini D, Lo Muzio L, Morganti S, Pozzi V, Di Ruscio G, Rocchetti R, Rubini C, Santarelli A, Emanuelli M. Pokemon proto-oncogene in oral cancer: potential role in the early phase of tumorigenesis. Oral Dis 2015; 21:462-9. [DOI: 10.1111/odi.12304] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 11/04/2014] [Accepted: 11/24/2014] [Indexed: 02/06/2023]
Affiliation(s)
- D Sartini
- Dipartimento di Scienze Cliniche Specialistiche e Odontostomatologiche; Università Politecnica delle Marche; Ancona Italy
| | - L Lo Muzio
- Dipartimento di Medicina Clinica e Sperimentale; Università degli Studi di Foggia; Foggia Italy
| | - S Morganti
- Dipartimento di Scienze Cliniche Specialistiche e Odontostomatologiche; Università Politecnica delle Marche; Ancona Italy
| | - V Pozzi
- Dipartimento di Scienze Cliniche Specialistiche e Odontostomatologiche; Università Politecnica delle Marche; Ancona Italy
| | - G Di Ruscio
- Dipartimento di Scienze Cliniche Specialistiche e Odontostomatologiche; Università Politecnica delle Marche; Ancona Italy
| | - R Rocchetti
- Dipartimento di Scienze Biomediche e Sanità Pubblica; Università Politecnica delle Marche; Ancona Italy
| | - C Rubini
- Dipartimento di Scienze Biomediche e Sanità Pubblica; Università Politecnica delle Marche; Ancona Italy
| | - A Santarelli
- Dipartimento di Scienze Cliniche Specialistiche e Odontostomatologiche; Università Politecnica delle Marche; Ancona Italy
- I.R.C.C.S. - I.N.R.C.A.; Ancona Italy
| | - M Emanuelli
- Dipartimento di Scienze Cliniche Specialistiche e Odontostomatologiche; Università Politecnica delle Marche; Ancona Italy
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8
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Castellino SM, Ullrich NJ, Whelen MJ, Lange BJ. Developing interventions for cancer-related cognitive dysfunction in childhood cancer survivors. J Natl Cancer Inst 2014; 106:dju186. [PMID: 25080574 DOI: 10.1093/jnci/dju186] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Survivors of childhood cancer frequently experience cancer-related cognitive dysfunction, commonly months to years after treatment for pediatric brain tumors, acute lymphoblastic leukemia (ALL), or tumors involving the head and neck. Risk factors for cancer-related cognitive dysfunction include young age at diagnosis, treatment with cranial irradiation, use of parenteral or intrathecal methotrexate, female sex, and pre-existing comorbidities. Limiting use and reducing doses and volume of cranial irradiation while intensifying chemotherapy have improved survival and reduced the severity of cognitive dysfunction, especially in leukemia. Nonetheless, problems in core functional domains of attention, processing speed, working memory and visual-motor integration continue to compromise quality of life and performance. We review the epidemiology, pathophysiology and assessment of cancer-related cognitive dysfunction, the impact of treatment changes for prevention, and the broad strategies for educational and pharmacological interventions to remediate established cognitive dysfunction following childhood cancer. The increased years of life saved after childhood cancer warrants continued study toward the prevention and remediation of cancer-related cognitive dysfunction, using uniform assessments anchored in functional outcomes.
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Affiliation(s)
- Sharon M Castellino
- Department of Pediatrics, Section on Hematology and Oncology, Wake Forest School of Medicine, Winston-Salem, NC (SMC); Comprehensive Cancer Center of Wake Forest University, Winston-Salem, NC (SMC, MJW); Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, MA (NJU); Department of Pediatrics, Children's Hospital of Philadelphia, Perelman School of Medicine, Philadelphia, PA (BJL).
| | - Nicole J Ullrich
- Department of Pediatrics, Section on Hematology and Oncology, Wake Forest School of Medicine, Winston-Salem, NC (SMC); Comprehensive Cancer Center of Wake Forest University, Winston-Salem, NC (SMC, MJW); Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, MA (NJU); Department of Pediatrics, Children's Hospital of Philadelphia, Perelman School of Medicine, Philadelphia, PA (BJL)
| | - Megan J Whelen
- Department of Pediatrics, Section on Hematology and Oncology, Wake Forest School of Medicine, Winston-Salem, NC (SMC); Comprehensive Cancer Center of Wake Forest University, Winston-Salem, NC (SMC, MJW); Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, MA (NJU); Department of Pediatrics, Children's Hospital of Philadelphia, Perelman School of Medicine, Philadelphia, PA (BJL)
| | - Beverly J Lange
- Department of Pediatrics, Section on Hematology and Oncology, Wake Forest School of Medicine, Winston-Salem, NC (SMC); Comprehensive Cancer Center of Wake Forest University, Winston-Salem, NC (SMC, MJW); Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, MA (NJU); Department of Pediatrics, Children's Hospital of Philadelphia, Perelman School of Medicine, Philadelphia, PA (BJL)
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9
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Guo C, Zhu K, Sun W, Yang B, Gu W, Luo J, Peng B, Zheng J. The effect of Pokemon on bladder cancer epithelial-mesenchymal transition. Biochem Biophys Res Commun 2014; 443:1226-31. [PMID: 24393848 DOI: 10.1016/j.bbrc.2013.12.115] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2013] [Accepted: 12/22/2013] [Indexed: 10/25/2022]
Abstract
OBJECTIVE This study aimed at detecting Pokemon expression in bladder cancer cell and investigating the relationship between Pokemon and epithelial-mesenchymal transition. Furthermore, we investigated the functions of Pokemon in the carcinogenesis and development of bladder cancer. This study was also designed to observe the inhibitory effects of siRNA expression vector on Pokemon in bladder cancer cell. METHODS The siRNA expression vectors which were constructed to express a short hairpin RNA against Pokemon were transfected to the bladder cancer cells T24 with a liposome. Levels of Pokemon, E-cadherin and β-catenin mRNA and protein were examined by real-time quantitative-fluorescent PCR and Western blot analysis, respectively. The effects of Pokemon silencing on epithelial-mesenchymal transition of T24 cells were evaluated with wound-healing assay. RESULTS Pokemon was strongly inhibited by siRNA treatment, especially siRNA3 treatment group, as it was reflected by Western blot and real-time PCR. The gene and protein of E-cadherin expression level showed increased markedly after Pokemon was inhibited by RNA interference. While there were no differences in the levels of gene and protein of β-catenin among five groups. The bladder cancer cell after Pokemon siRNA interference showed a significantly reduced wound-closing efficiency at 6, 12 and 24h. CONCLUSIONS Our findings suggest Pokemon may inhibit the expression of E-cadherin. The low expression of E-cadherin lead to increasing the phenotype and apical-base polarity of epithelial cells. These changes of cells may result in the recurrence and progression of bladder cancer at last.
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Affiliation(s)
- Changcheng Guo
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China.
| | - Kai Zhu
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China.
| | - Wei Sun
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China.
| | - Bin Yang
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China.
| | - Wenyu Gu
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China.
| | - Jun Luo
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China.
| | - Bo Peng
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China.
| | - Junhua Zheng
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China.
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p38β, A novel regulatory target of Pokemon in hepatic cells. Int J Mol Sci 2013; 14:13511-24. [PMID: 23807508 PMCID: PMC3742200 DOI: 10.3390/ijms140713511] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 06/08/2013] [Accepted: 06/10/2013] [Indexed: 11/27/2022] Open
Abstract
Pokemon is an important proto-oncogene involved in various biological processes and cancer development, such as cell differentiation, tumorigenesis and metastasis. Pokemon is recognized as a transcription factor localized upstream of several oncogenes, regulating their expression. p38MAPKs act as key regulatory factors in cellular signaling pathways associated with inflammatory responses, cell proliferation, differentiation and survival. p38β, a member of p38MAPK family, is closely correlated with tumorigenesis, but the mechanism of activation remains unclear. In this study, we found overexpression of Pokemon promoted the growth, migration and invasion of HepG2 cells. However, a p38 inhibitor SB202190 efficiently attenuated the promoting effect of Pokemon in the HepG2 cells. Targeted expression or silencing of Pokemon changed cellular p38β protein level and phosphorylation of downstream ATF2 in the p38 signaling pathway. Both dual luciferase report assay and ChIP assay suggested that p38β is a novel regulatory target of the transcription factor Pokemon and positively regulated by Pokemon in hepatic cells.
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11
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Li Y, Xu S, Wang X, Shi H, Sun Z, Yang Z. Tumor-specific RNA Interference Targeting Pokemon Suppresses Tumor Growth and Induces Apoptosis in Prostate Cancer. Urology 2013; 81:467.e1-7. [DOI: 10.1016/j.urology.2012.10.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Revised: 09/17/2012] [Accepted: 10/02/2012] [Indexed: 01/21/2023]
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12
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Dobson NR, Moore RT, Tobin JE, Armstrong RC. Leukemia/lymphoma-related factor regulates oligodendrocyte lineage cell differentiation in developing white matter. Glia 2012; 60:1378-90. [PMID: 22615173 DOI: 10.1002/glia.22356] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2012] [Accepted: 04/25/2012] [Indexed: 11/10/2022]
Abstract
Leukemia/lymphoma-related factor (LRF) is a zinc-finger transcription factor that regulates differentiation and oncogenesis in multiple tissues and cell lineages. The potential role for LRF in cells of the CNS has not been examined to date. This study shows prominent nuclear expression of LRF in diverse neuronal populations and in oligodendrocytes. We focused on examining the function of LRF during the transition from oligodendrocyte progenitor (OP) to mature oligodendrocyte that is associated with myelination in the postnatal spinal cord. During spinal cord myelination, LRF is expressed in only a minority of OP cells whereas most mature oligodendrocytes exhibited nuclear LRF immunoreactivity. Mice with floxed alleles of the Zbtb7a gene, which encodes for LRF protein, were used for in vivo analysis of LRF function. Lentiviral driven Cre recombinase inactivation of LRF at postnatal day 7 reduced the proportion of OP cells that differentiated into mature oligodendrocytes by postnatal day 28. Astrocyte populations were not altered by LRF deletion in the same tissues. These results indicate that LRF deletion reduces differentiation within the oligodendrocyte lineage and does not alter OP lineage choice. In vitro analysis confirmed a specific effect of LRF on OP differentiation. In neonatal OP cultures, RNA interference targeting LRF inhibited OP differentiation while LRF transduction was sufficient to induce differentiation into oligodendrocytes. These results support a critical role for LRF in transcriptional control of differentiation in oligodendrocyte lineage cells during developmental myelination in the CNS.
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Affiliation(s)
- Nicole R Dobson
- Department of Pediatrics, Uniformed Services University of Health Sciences, Bethesda, MD 20814, USA
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13
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Pokemon silencing leads to Bim-mediated anoikis of human hepatoma cell QGY7703. Int J Mol Sci 2012; 13:5818-5831. [PMID: 22754333 PMCID: PMC3382817 DOI: 10.3390/ijms13055818] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Revised: 04/23/2012] [Accepted: 05/07/2012] [Indexed: 01/15/2023] Open
Abstract
Pokemon is an important proto-oncogene that plays a critical role in cellular oncogenic transformation and tumorigenesis. Anoikis, which is regulated by Bim-mediated apoptosis, is critical to cancer cell invasion and metastasis. We investigated the role of Pokemon in anoikis, and our results show that Pokemon renders liver cells resistant to anoikis via suppression of Bim transcription. We knocked-down Pokemon in human hepatoma cells QGY7703 with small interfering RNAs (siRNA). Knockdown of Pokemon alone did not significantly affect the growth and survival of QGY7703 cells but notably enhanced their sensitivity to apoptotic stress due to the presence of chemical agents or cell detachment, thereby inducing anoikis, as evidenced by flow cytometry and caspase-3 activity assays. In contrast, ectopic expression of Pokemon in HL7702 cells led to resistance to anoikis. Dual-luciferase reporter and ChIP assays illustrated that Pokemon suppressed Bim transcription via direct binding to its promoter. Our results suggest that Pokemon prevents anoikis through the suppression of Bim expression, which facilitates tumor cell invasion and metastasis. This Pokemon-Bim pathway may be an effective target for therapeutic intervention for cancer.
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Fang F, Yang L, Tao Y, Qin W. FBI-1 promotes cell proliferation and enhances resistance to chemotherapy of hepatocellular carcinoma in vitro and in vivo. Cancer 2011; 118:134-46. [PMID: 21713761 DOI: 10.1002/cncr.26251] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2010] [Revised: 04/14/2011] [Accepted: 04/15/2011] [Indexed: 11/10/2022]
Abstract
BACKGROUND The so-called factor that binds to inducer of short transcripts-1 (FBI-1) purportedly plays an important role in tumorigenesis; however, its role in hepatocellular carcinoma (HCC) remains unknown. The objective of this study was to investigate the expression level, clinical relevance, and biologic function of FBI-1 in HCC. METHODS Real-time quantitative reverse transcriptase-polymerase chain reaction analysis, Western blot analysis, and immunohistochemical staining were used to detect expression levels of FBI-1 and to analyze its relation to clinicopathologic parameters and to the prognosis of patients with HCC. In addition, the biologic functions of FBI-1 in regulating cell proliferation, migration, and reaction to chemotherapy were detected by using HepG2 cells and SMMC-7721 cells; subsequently, the molecular mechanism of FBI-1 also was investigated. Finally, a xenograft mouse model was used to validate the observations obtained from in vitro studies. RESULTS Expression levels of FBI-1 messenger RNA and protein were elevated significantly in HCC tissues compared with adjacent nontumorous liver tissues (ANLTs). Increased FBI-1 expression was correlated with multiple tumor nodes, Edmondson-Steiner grade, and a poor prognosis in patients with HCC (P < .05). In vitro studies revealed that FBI-1 was capable of promoting cell proliferation (but not cell migration) by regulating the cell cycle regulation proteins p53, p21, and p27. In addition, FBI-1 could inhibit cell death induced by 5-fluorouracil or doxorubicin through suppressing the activation of p53. Consistent with the in vitro data, FBI-1 was capable of promoting cell proliferation and enhancing chemotherapy resistance of HCC in vivo. CONCLUSIONS The current findings indicated that FBI-1 plays an important role in HCC carcinogenesis and chemotherapy tolerance, and FBI-1 may served as a novel prognostic marker and therapeutic target for HCC.
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Affiliation(s)
- Feng Fang
- Liver Cancer Laboratory, Department of Surgery, Xiangya Hospital, Central South University, Changsha City, People's Republic of China
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Aggarwal H, Aggarwal A, Agrawal DK. Epidermal growth factor increases LRF/Pokemon expression in human prostate cancer cells. Exp Mol Pathol 2011; 91:496-501. [PMID: 21640721 DOI: 10.1016/j.yexmp.2011.05.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2011] [Accepted: 05/18/2011] [Indexed: 11/26/2022]
Abstract
Leukemia/lymphoma related factor/POK erythroid myeloid ontogenic factor (LRF/Pokemon) is a member of the POK family of proteins that promotes oncogenesis in several forms of cancer. Recently, we found higher LRF expression in human breast and prostate carcinomas compared to the corresponding normal tissues. The aim of this study was to examine the regulation of LRF expression in human prostate cells. Epidermal growth factor (EGF) and its receptors mediate several tumorigenic cascades that regulate cell differentiation, proliferation, migration and survival of prostate cancer cells. There was significantly higher level of LRF expression in the nucleus of LNCaP and PC-3 cells than RWPE-1 cells. A significant increase in LRF expression was observed with increasing doses of EGF in more aggressive and androgen-sensitive prostate cancer cells suggesting that EGF signaling pathway is critical in upregulating the expression of LRF/Pokemon to promote oncogenesis.
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Affiliation(s)
- Himanshu Aggarwal
- Center for Clinical & Translational Science, Creighton University School of Medicine, Omaha, NE 68178, USA
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Expression of leukemia/lymphoma related factor (LRF/Pokemon) in human benign prostate hyperplasia and prostate cancer. Exp Mol Pathol 2011; 90:226-30. [DOI: 10.1016/j.yexmp.2011.01.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2010] [Accepted: 01/10/2011] [Indexed: 01/23/2023]
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Aggarwal A, Hunter WJ, Aggarwal H, Silva ED, Davey MS, Murphy RF, Agrawal DK. Expression of leukemia/lymphoma-related factor (LRF/POKEMON) in human breast carcinoma and other cancers. Exp Mol Pathol 2010; 89:140-8. [PMID: 20471975 DOI: 10.1016/j.yexmp.2010.05.002] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2009] [Revised: 05/02/2010] [Accepted: 05/03/2010] [Indexed: 10/19/2022]
Abstract
The POK family of proteins plays an important role in not only embryonic development and cell differentiation, but also in oncogenesis. Leukemia/lymphoma-related factor (LRF) belongs to the POK family of transcriptional repressors and is also known as POK erythroid myeloid ontogenic factor (POKEMON), which binds to short transcripts of HIV-1 (FBI-1) and TTF-1 interacting peptide (TIP21). Its oncogenic role is known only in lymphoma, non-small cell lung carcinoma, and malignant gliomas. The functional expression of LRF in human breast carcinoma has not yet been confirmed. The aim of this study was to investigate and compare the expression of LRF in human breast cancer tissues and other human tumors. The expression of LRF mRNA transcripts and protein was observed in twenty human benign and malignant breast biopsy tissues. Expression of LRF was observed in several formalin-fixed tissues by immunohistochemistry and immunofluorescence. All malignant breast tissues expressed mRNA transcripts and protein for LRF. However, 40% and 15% benign breast biopsy tissues expressed LRF mRNA transcripts and protein, respectively. The overall expression of LRF mRNA transcripts and total protein was significantly more in malignant breast tissues than the benign breast tissues. LRF expression was also observed in the nuclei of human colon, renal, lung, hepatocellular carcinomas and thymoma tumor cells. In general, a significantly higher expression of LRF was seen in malignant tissues than in the corresponding benign or normal tissue. Further studies are warranted to determine the malignant role of LRF in human breast carcinoma.
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Affiliation(s)
- Anshu Aggarwal
- Department of Biomedical Sciences, Creighton University School of Medicine, Omaha, NE, 68178, USA
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Zhao ZH, Wang SF, Yu L, Wang J, Chang H, Yan WL, Zhang J, Fu K. Overexpression of Pokemon in non-small cell lung cancer and foreshowing tumor biological behavior as well as clinical results. Lung Cancer 2008; 62:113-9. [PMID: 18550205 DOI: 10.1016/j.lungcan.2008.02.014] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2007] [Revised: 01/31/2008] [Accepted: 02/07/2008] [Indexed: 11/28/2022]
Abstract
BACKGROUND Transcription factor Pokemon, a central regulation gene of the important tumor suppressor alternative reading frame (ARF), exerted its activity by acting upstream of many tumor-suppressing genes and proto-oncogenes. Its expression in non-small cell lung cancer (NSCLC) and its clinical significance remains unclear. The aim of this study was to investigate the expression of Pokemon in non-small cell lung cancer and to explore its correlation with the clinical pathological characteristics and its influence on patients' prognosis. AIM Observe the expression of Pokemon in NSCLC and investigate its mechanism and clinical significance. METHODS Determine the expression of Pokemon in human NSCLC cell lines as well as 55 cases of NSCLC tumor tissues, tumor adjacent tissues and surrounding tissues by reverse transcription-polymerase chain reaction (RT-PCR) and Western blot, and analyze the relationship between Pokemon expression in NSCLC tumor tissues and clinicopathological features. Determine 62 NSCLC tumor tissues (5 years ago) and p14(ARF) expression with immunohistochemical technique, discuss the correlation between them and assess the effect of Pokemon on prognosis of patients with lung cancer. RESULTS Pokemon mRNA and protein took on high expression in lung cancer cell lines, and the expression difference between cancer tissues, tumor adjacent tissues and surrounding tissues had statistical significance (P<0.05). Pokemon expression and p14(ARF) expression were negatively correlated (r=-0.287). The expression of Pokemon was determined not to be associated with the patient's sex, age, smoking condition, tumor differentiation degree, histology and lymph node metastasis condition. However, its relationship with TNM staging was established (P<0.05). Furthermore, it was shown that the survival rate of patients with negative Pokemon expression was significantly higher than that of those with positive Pokemon expression (P=0.004), therefore, the expression of Pokemon is believed to be an independent factor affecting prognosis (P=0.034). CONCLUSION There was high expression of Pokemon in NSCLC, Pokemon exerted carcinogenesis by inhibiting ARF and had some clinical significance for prognostic evaluation of the patients with NSCLC.
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Affiliation(s)
- Zhi-Hong Zhao
- Department of Chest Surgery, First Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang, China
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Expression of transcription factor Pokemon in non-small cell lung cancer and its clinical significance. Chin Med J (Engl) 2008. [DOI: 10.1097/00029330-200803010-00015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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Agrawal A, Yang J, Murphy RF, Agrawal DK. Regulation of the p14ARF-Mdm2-p53 pathway: an overview in breast cancer. Exp Mol Pathol 2006; 81:115-22. [PMID: 16919268 DOI: 10.1016/j.yexmp.2006.07.001] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2006] [Accepted: 07/07/2006] [Indexed: 12/22/2022]
Abstract
Knowledge of the roles of proteins that are abnormally suppressed or activated due to mutation in the DNA sequences of the common tumor suppressor genes, p14ARF and p53, is critical to the understanding the pathogenesis of breast cancer. Mdm2 is a mediator for the function of both p14ARF and p53. In this review article factors including Pokemon, Geminin, Twist, and Apigenin, which control the action of individual proteins in the p14ARF-Mdm2-p53 pathway in breast cancer as well the consequences of mutation 7 of p53 are discussed. The complexity of interaction of components of the pathway and the underlying development of cancer is emphasized. Opportunities for future therapeutic innovations are indicated.
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Affiliation(s)
- Anshu Agrawal
- Department of Biomedical Sciences, Medicine, and Medical Microbiology and Immunology, Creighton University School of Medicine, CRISS II Room 510, 2500 California Plaza, Omaha, NE 68178, USA
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