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Zhou X, Ren Y, Han L, Mei M, Xu P, Zhang CZ, Wang GX, Jia ZF, Pu PY, Kang CS. [Retracted] Role of the AKT pathway in microRNA expression of human U251 glioblastoma cells. Int J Oncol 2024; 64:9. [PMID: 38063241 PMCID: PMC10734665 DOI: 10.3892/ijo.2023.5597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2009] [Accepted: 12/28/2009] [Indexed: 12/24/2023] Open
Abstract
Following the publication of the above article, a concerned reader drew to the Editor's attention that, regarding the western blots featured in Fig. 3B on p. 670, the bands featured in the U251 and U251‑MC lanes for the miR‑21 and U6 experiments appeared to be duplicates of each other. Moreover, certain of these data were strikingly similar to data that appeared in another article published at around the same time featuring some of the same authors (again, with apparent duplications of bands within the same gel slices, as they were presented). After having conducted an internal investigation of this matter, the Editor of International Journal of Oncology has judged that the apparently anomalous grouping of the data could not have been attributed to pure coincidence. Therefore, the Editor has decided that this article should be retracted from the publication on the grounds of an overall lack of confidence in the data. The authors were asked for an explanation to account for these concerns, but the Editorial Office did not receive a reply. The Editor sincerely apologizes to the readership for any incovenience caused, and we thank the reader for bringing this matter to our attention. [International Journal of Oncology 36: 665‑672, 2010; DOI: 10.3892/ijo_00000542].
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Affiliation(s)
- Xuan Zhou
- Laboratory of Neuro-oncology, Tianjin Neurological Institute, Tianjin 300052, P.R. China
| | - Yu Ren
- Tianjin Research Centre of Basic Medical Science, Tianjin Medical University, Tianjin 300070, P.R. China
| | - Lei Han
- Laboratory of Neuro-oncology, Tianjin Neurological Institute, Tianjin 300052, P.R. China
| | - Mei Mei
- Tianjin Research Centre of Basic Medical Science, Tianjin Medical University, Tianjin 300070, P.R. China
| | - Peng Xu
- Laboratory of Neuro-oncology, Tianjin Neurological Institute, Tianjin 300052, P.R. China
| | - Chun-Zhi Zhang
- Laboratory of Neuro-oncology, Tianjin Neurological Institute, Tianjin 300052, P.R. China
| | - Guang-Xiu Wang
- Laboratory of Neuro-oncology, Tianjin Neurological Institute, Tianjin 300052, P.R. China
| | - Zhi-Fan Jia
- Laboratory of Neuro-oncology, Tianjin Neurological Institute, Tianjin 300052, P.R. China
| | - Pei-Yu Pu
- Laboratory of Neuro-oncology, Tianjin Neurological Institute, Tianjin 300052, P.R. China
| | - Chun-Sheng Kang
- Laboratory of Neuro-oncology, Tianjin Neurological Institute, Tianjin 300052, P.R. China
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Tong F, Zhao JX, Fang ZY, Cui XT, Su DY, Liu X, Zhou JH, Wang GX, Qiu ZJ, Liu SZ, Fu JQ, Kang CS, Wang JC, Wang QX. MUC1 promotes glioblastoma progression and TMZ resistance by stabilizing EGFRvIII. Pharmacol Res 2023; 187:106606. [PMID: 36516884 DOI: 10.1016/j.phrs.2022.106606] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 12/01/2022] [Accepted: 12/09/2022] [Indexed: 12/14/2022]
Abstract
Epidermal growth factor receptor variant III (EGFRvIII) is a mutant isoform of EGFR with a deletion of exons 2-7 making it insensitive to EGF stimulation and downstream signal constitutive activation. However, the mechanism underlying the stability of EGFRvIII remains unclear. Based on CRISPR-Cas9 library screening, we found that mucin1 (MUC1) is essential for EGFRvIII glioma cell survival and temozolomide (TMZ) resistance. We revealed that MUC1-C was upregulated in EGFRvIII-positive cells, where it enhanced the stability of EGFRvIII. Knockdown of MUC1-C increased the colocalization of EGFRvIII and lysosomes. Upregulation of MUC1 occurred in an NF-κB dependent manner, and inhibition of the NF-κB pathway could interrupt the EGFRvIII-MUC1 feedback loop by inhibiting MUC1-C. In a previous report, we identified AC1Q3QWB (AQB), a small molecule that could inhibit the phosphorylation of NF-κB. By screening the structural analogs of AQB, we obtained EPIC-1027, which could inhibit the NF-κB pathway more effectively. EPIC-1027 disrupted the EGFRvIII-MUC1-C positive feedback loop in vitro and in vivo, inhibited glioma progression, and promoted sensitization to TMZ. In conclusion, we revealed the pivotal role of MUC1-C in stabilizing EGFRvIII in glioblastoma (GBM) and identified a small molecule, EPIC-1027, with great potential in GBM treatment.
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Affiliation(s)
- Fei Tong
- Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Neurological Institute, Key Laboratory of Neurotrauma, Variation, and Regeneration, Ministry of Education and Tianjin Municipal Government, Tianjin 300052, China
| | - Ji-Xing Zhao
- Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Neurological Institute, Key Laboratory of Neurotrauma, Variation, and Regeneration, Ministry of Education and Tianjin Municipal Government, Tianjin 300052, China
| | - Zi-Yuan Fang
- Clinical Medical College, Hebei University, Baoding 071000, China
| | - Xiao-Teng Cui
- Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Neurological Institute, Key Laboratory of Neurotrauma, Variation, and Regeneration, Ministry of Education and Tianjin Municipal Government, Tianjin 300052, China
| | - Dong-Yuan Su
- Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Neurological Institute, Key Laboratory of Neurotrauma, Variation, and Regeneration, Ministry of Education and Tianjin Municipal Government, Tianjin 300052, China
| | - Xing Liu
- Beijing Neurosurgical Institute, Capital Medical University, Beijing 100050, China
| | - Jun-Hu Zhou
- Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Neurological Institute, Key Laboratory of Neurotrauma, Variation, and Regeneration, Ministry of Education and Tianjin Municipal Government, Tianjin 300052, China
| | - Guang-Xiu Wang
- Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Neurological Institute, Key Laboratory of Neurotrauma, Variation, and Regeneration, Ministry of Education and Tianjin Municipal Government, Tianjin 300052, China
| | - Zhi-Jun Qiu
- Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Shi-Zhong Liu
- Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Jun-Qi Fu
- Department of Neurosurgery, Haikou Affiliated Hospital of Xiangya Medical College, Central South University, Hainan 570311, China; Department of Neurosurgery, Haikou People's Hospital, Hainan 570208, China
| | - Chun-Sheng Kang
- Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Neurological Institute, Key Laboratory of Neurotrauma, Variation, and Regeneration, Ministry of Education and Tianjin Municipal Government, Tianjin 300052, China.
| | - Jia-Chong Wang
- Department of Neurosurgery, Haikou Affiliated Hospital of Xiangya Medical College, Central South University, Hainan 570311, China; Department of Neurosurgery, Haikou People's Hospital, Hainan 570208, China.
| | - Qi-Xue Wang
- Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Neurological Institute, Key Laboratory of Neurotrauma, Variation, and Regeneration, Ministry of Education and Tianjin Municipal Government, Tianjin 300052, China.
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Ong JJ, Azmil SS, Kang CS, Lim SF, Ooi GC, Patel A, Mawardi M. Foot care knowledge and self-care practices among diabetic patients in Penang: A primary care study. Med J Malaysia 2022; 77:224-231. [PMID: 35338631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
INTRODUCTION In Malaysia, the prevalence of diabetes mellitus has been increasing annually, currently affecting 18.3% of the population. Diabetic foot ulcer, a common complication of diabetes, is associated with high morbidity and mortality, consequently increasing health care expenditure. A previous study showed that foot care knowledge and foot self-care practices help to reduce the development of ulcers.1,2 This study aims to identify the level of foot care knowledge and self-care practices among diabetic patients in the primary care setting. OBJECTIVE This study was to determine the level of foot care knowledge and foot self-care practices among diabetic patients in the primary care setting in Penang Island and its determinants and the correlation between level of foot care knowledge and self-care practices among diabetic patients. MATERIAL AND METHODS A cross sectional study was performed on 311 diabetic patients who were registered to two government health clinics in Penang. Information regarding respondents' demographic status, foot care knowledge, and foot self-care practices were gathered using a self-administered questionnaire. Data were analysed using the Statistical Package for the Social Sciences (SPSS) 22. The Mann-Whitney U test and Kruskal-Wallis test were applied to the analysis. Multiple linear regression was performed to identify the determinants. Correlation between knowledge and self-care practice was determined using the linear regression model. RESULTS One hundred and sixty-five (53.1%) respondents achieved good knowledge scores and 196 respondents (63%) achieved good self-care practice scores. The median age of respondents was 61 years, who were mostly females (56.6%), Malays (41.2%), and unemployed (48.6%). Median HbA1c level was 7.5%, and 42.8% of respondents had diabetes for 5 to 10 years. Lowest scores for knowledge and self-care practices were observed in foot skin care questions. Formal foot care education was found to be a significant predictor of foot care knowledge (p<0.05, 95% CI -1.102, -0.098). Foot care knowledge was significantly and positively correlated with foot self-care practices (p<0.001, 95% CI 0.548, 0.727). CONCLUSION Foot care knowledge has significant positive correlation with foot self-care practices. Empowering diabetic patients with foot care knowledge may lead to significantly better foot self-care practices.
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Affiliation(s)
- J J Ong
- Klinik Kesihatan Batu Muda, Malaysia
| | - S S Azmil
- Klinik Kesihatan Bayan Baru, Malaysia
| | - C S Kang
- Klinik Singapore, Jalan Trengganu, Penang, Malaysia
| | - S F Lim
- Klinik Kesihatan Jalan Perak, Malaysia
| | - G C Ooi
- Klinik Lim, Jalan Che Ahmad, SPS Nibong Tebal, Malaysia
| | - A Patel
- Klinik Kesihatan Cheras Baru, Malaysia
| | - M Mawardi
- Universiti Putra Malaysia, Faculty of Medicine and Health Sciences, Department of Family Medicine, Malaysia.
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Chai RC, Wu F, Wang QX, Zhang S, Zhang KN, Liu YQ, Zhao Z, Jiang T, Wang YZ, Kang CS. m 6A RNA methylation regulators contribute to malignant progression and have clinical prognostic impact in gliomas. Aging (Albany NY) 2020; 11:1204-1225. [PMID: 30810537 PMCID: PMC6402513 DOI: 10.18632/aging.101829] [Citation(s) in RCA: 156] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 02/12/2019] [Indexed: 12/22/2022]
Abstract
N6-methyladenosine (m6A) RNA methylation, associated with cancer initiation and progression, is dynamically regulated by the m6A RNA methylation regulators (“writers”, “erasers” and “readers”). Here, we demonstrate that most of the thirteen main m6A RNA methylation regulators are differentially expressed among gliomas stratified by different clinicopathological features in 904 gliomas. We identified two subgroups of gliomas (RM1/2) by applying consensus clustering to m6A RNA methylation regulators. Compared with the RM1 subgroup, the RM2 subgroup correlates with a poorer prognosis, higher WHO grade, and lower frequency of IDH mutation. Moreover, the hallmarks of epithelial-mesenchymal transition and TNFα signaling via NF-κB are also significantly enriched in the RM2 subgroup. This finding indicates that m6A RNA methylation regulators are closely associated with glioma malignancy. Based on this finding, we derived a risk signature, using seven m6A RNA methylation regulators, that is not only an independent prognostic marker but can also predict the clinicopathological features of gliomas. Moreover, m6A regulators are associated with the mesenchymal subtype and TMZ sensitivity in GBM. In conclusion, m6A RNA methylation regulators are crucial participants in the malignant progression of gliomas and are potentially useful for prognostic stratification and treatment strategy development.
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Affiliation(s)
- Rui-Chao Chai
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing 100160, China.,China National Clinical Research Center for Neurological Diseases, Beijing, China.,Chinese Glioma Genome Atlas Network (CGGA)
| | - Fan Wu
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing 100160, China.,Chinese Glioma Genome Atlas Network (CGGA)
| | - Qi-Xue Wang
- Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Department of Neurosurgery, Tianjin Medical University General Hospital and Key Laboratory of Neurotrauma, Variation, and Regeneration, Ministry of Education and Tianjin Municipal Government, Tianjin 300052, China.,Chinese Glioma Genome Atlas Network (CGGA)
| | - Shu Zhang
- Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Department of Neurosurgery, Tianjin Medical University General Hospital and Key Laboratory of Neurotrauma, Variation, and Regeneration, Ministry of Education and Tianjin Municipal Government, Tianjin 300052, China
| | - Ke-Nan Zhang
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing 100160, China.,Chinese Glioma Genome Atlas Network (CGGA)
| | - Yu-Qing Liu
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing 100160, China.,Chinese Glioma Genome Atlas Network (CGGA)
| | - Zheng Zhao
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing 100160, China.,Chinese Glioma Genome Atlas Network (CGGA)
| | - Tao Jiang
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing 100160, China.,Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing 100160, China.,China National Clinical Research Center for Neurological Diseases, Beijing, China.,Chinese Glioma Genome Atlas Network (CGGA)
| | - Yong-Zhi Wang
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing 100160, China.,Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing 100160, China.,China National Clinical Research Center for Neurological Diseases, Beijing, China.,Chinese Glioma Genome Atlas Network (CGGA)
| | - Chun-Sheng Kang
- Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Department of Neurosurgery, Tianjin Medical University General Hospital and Key Laboratory of Neurotrauma, Variation, and Regeneration, Ministry of Education and Tianjin Municipal Government, Tianjin 300052, China.,Chinese Glioma Genome Atlas Network (CGGA).,Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou 510095, China
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5
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Yang C, Wang L, Sun J, Zhou JH, Tan YL, Wang YF, You H, Wang QX, Kang CS. Identification of long non-coding RNA HERC2P2 as a tumor suppressor in glioma. Carcinogenesis 2020; 40:956-964. [PMID: 30809632 DOI: 10.1093/carcin/bgz043] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 02/15/2019] [Accepted: 02/23/2019] [Indexed: 01/08/2023] Open
Abstract
Long non-coding RNAs (lncRNAs) have been reported to play important roles in glioma; however, most of them promote glioma progression. We constructed a competing endogenous (ceRNA) network based on the Chinese Glioma Genome Atlas dataset, and lncRNA hect domain and RLD 2 pseudogene 2 (HERC2P2) is the core of this network. Highly connected genes in the ceRNA network classified the glioma patients into three clusters with significantly different survival rates. The expression of HERC2P2 is positively correlated with survival and negatively correlated with clinical grade. Cell colony formation, Transwell and cell scratch tests were performed to evaluate the role of HERC2P2 in glioblastoma growth. Furthermore, we overexpressed HERC2P2 in U87 cells and established a mouse intracranial glioma model to examine the function of HERC2P2 in vivo. In conclusion, we identified a lncRNA with tumor suppressor functions in glioma that could be a potential biomarker for glioma patients.
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Affiliation(s)
- Chao Yang
- Tianjin Neurological Institute, Key Laboratory of Post-neurotrauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, China.,Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Lin Wang
- Tianjin Neurological Institute, Key Laboratory of Post-neurotrauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, China.,Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Jia Sun
- ProteinT Biotechnology Ltd. Co. Tianjin Airport Free Trade Zone, Tianjin, China
| | - Jun-Hu Zhou
- Tianjin Neurological Institute, Key Laboratory of Post-neurotrauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, China.,Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Yan-Li Tan
- College of Fundamental Medicine, Hebei University, Baoding, China
| | - Yun-Fei Wang
- Tianjin Neurological Institute, Key Laboratory of Post-neurotrauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, China.,Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Hua You
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China
| | - Qi-Xue Wang
- Tianjin Neurological Institute, Key Laboratory of Post-neurotrauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, China.,Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Chun-Sheng Kang
- Tianjin Neurological Institute, Key Laboratory of Post-neurotrauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, China.,Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China.,Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China
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Li TT, Kang CS, Li HZ, Xue JP, Yang QM, Lyu J. [Value of shear wave elastrography image classification in the diagnosis of breast masses]. Zhonghua Zhong Liu Za Zhi 2019; 41:540-545. [PMID: 31357843 DOI: 10.3760/cma.j.issn.0253-3766.2019.07.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the image features of shear wave elastrography (SWE) in breast masses, and to evaluate their values in the differentiation of benign and malignant breast lesions. Methods: A total of 361 patients with 403 breast lesions who simultaneously underwent conventional ultrasound and SWE examination from February 2015 to January 2018 were selected. Diagnosis in all patients was confirmed by aspiration biopsy or operative pathology. The SWE images were collected and the elastic images were divided into 5 types. The SWE image features of different breast pathological types were summarized, and their values in benign and malignant breast lesion diagnoses were evaluated. Results: The main features of benign breast lesion were type Ⅰ and Ⅱ, the main features of the malignant lesion were type Ⅳ and Ⅴ, and the proportion of which were 43.6% (71/163), 37.4% (61/163), 22.1% (53/240) and 57.9% (139/240), respectively. Type Ⅲ accounted for a certain proportion in both benign and malignant lesions. The SWE image features of benign and malignant lesions were compared and a significant difference was observed (P<0.001). The type Ⅴ features were mainly observed in invasive ductal carcinoma, invasive lobular carcinoma and other types of invasive carcinoma, while the type Ⅳ features were mostly presented in ductal carcinoma in situ and mucinous carcinoma. Fibroadenoma, fibroadenosis accompanied with fibroadenoma, and fibroadenosis were featured with type Ⅰ. Both intraductal papilloma and benign phyllodes tumor were mostly type Ⅱ, while type Ⅲ and Ⅴ were more common in chronic granulomatous mastitis. When type Ⅰ and typeⅡof breast lesions were classified as benign features while type Ⅳ and Ⅴ were malignant features, the sensitivity and specificity of breast malignant lesion diagnosis were 91.2% and 84.7% by application of SWE combined with breast imaging reporting and data system (BI-RADS). The sensitivity of combined diagnosis was slightly lower than that of conventional ultrasound (P>0.05), but the specificity was significantly higher than conventional ultrasound (P<0.01). Conclusion: The SWE is a simple and effective method. Combination of SWE with conventional ultrasound may improve the diagnostic differentiation of benign and malignant breast lesions.
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Affiliation(s)
- T T Li
- Department of Ultrasound, Shanxi Academy of Medical Sciences, Dayi Hospital of Shanxi Medical University, Taiyuan 030032, China
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Ren Y, Wang YF, Zhang J, Wang QX, Han L, Mei M, Kang CS. Targeted design and identification of AC1NOD4Q to block activity of HOTAIR by abrogating the scaffold interaction with EZH2. Clin Epigenetics 2019; 11:29. [PMID: 30764859 PMCID: PMC6376746 DOI: 10.1186/s13148-019-0624-2] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 01/29/2019] [Indexed: 02/07/2023] Open
Abstract
Background Nearly 25% of long intergenic non-coding RNAs (lincRNAs) recruit chromatin-modifying proteins (e.g., EZH2) to silence target genes. HOX antisense intergenic RNA (HOTAIR) is deregulated in diverse cancers and could be an independent and powerful predictor of eventual metastasis and death. Yet, it is challenging to develop small molecule drugs to block activity of HOTAIR with high specificity in a short time. Results Our previous study proved that the 5′ domain, but not its 3′ domain, was the function domain of HOTAIR responsible for tumorigenesis and metastasis in glioblastoma and breast cancer, by recruiting and binding EZH2. Here, we targeted to establish a structure-based methodology to identify lead compounds of HOTAIR, by abrogating scaffold interactions with EZH2. And a small compound AC1NOD4Q (ADQ) was identified by high-throughput molecular docking-based virtual screening of the PubChem library. Our analysis revealed that ADQ was sufficiently and specifically interfering HOTAIR/EZH2 interaction, thereby impairing the H3K27-mediated tri-methylation of NLK, the target of HOTAIR gene, and consequently inhibiting tumor metastasis through Wnt/β-catenin pathway in vitro and in orthotopic breast cancer models. The results of RIP and EMSA further revealed that 36G46A of 5′ domain was the essential binding site for ADQ exerted its inhibitory effect, further narrowed the structure and function of HOTAIR from the 5′ functional domain to the micro-domain. Conclusions Our findings suggest of a potential new strategy to discover the lead compound for targeted lincRNA therapy and potentially pave the way for exploiting ADQ as a scaffold for more effective small molecule drugs. Electronic supplementary material The online version of this article (10.1186/s13148-019-0624-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yu Ren
- Department of Neurosurgery, Tianjin Medical University General Hospital, Lab of Neuro-oncology, Tianjin Neurological Institute, Key Laboratory of Post-Neuro injury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China.,Department of Genetics, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Yun-Fei Wang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Lab of Neuro-oncology, Tianjin Neurological Institute, Key Laboratory of Post-Neuro injury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China
| | - Jing Zhang
- Irving Cancer Research Center, Columba University, New York, 10032, USA
| | - Qi-Xue Wang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Lab of Neuro-oncology, Tianjin Neurological Institute, Key Laboratory of Post-Neuro injury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China
| | - Lei Han
- Department of Neurosurgery, Tianjin Medical University General Hospital, Lab of Neuro-oncology, Tianjin Neurological Institute, Key Laboratory of Post-Neuro injury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China
| | - Mei Mei
- Department of Cell Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China.
| | - Chun-Sheng Kang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Lab of Neuro-oncology, Tianjin Neurological Institute, Key Laboratory of Post-Neuro injury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China. .,Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, 510095, China.
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Ren Y, Jia HH, Xu YQ, Zhou X, Zhao XH, Wang YF, Song X, Zhu ZY, Sun T, Dou Y, Tian WP, Zhao XL, Kang CS, Mei M. Paracrine and epigenetic control of CAF-induced metastasis: the role of HOTAIR stimulated by TGF-ß1 secretion. Mol Cancer 2018; 17:5. [PMID: 29325547 PMCID: PMC5765658 DOI: 10.1186/s12943-018-0758-4] [Citation(s) in RCA: 142] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 01/02/2018] [Indexed: 01/05/2023] Open
Abstract
Background The communication between carcinoma associated fibroblasts (CAFs) and cancer cells facilitate tumor metastasis. In this study, we further underlying the epigenetic mechanisms of CAFs feed the cancer cells and the molecular mediators involved in these processes. Methods MCF-7 and MDA-MB-231 cells were treated with CAFs culture conditioned medium, respectively. Cytokine antibody array, enzyme-linked immunosorbent assay, western blotting and immunofluorescence were used to identify the key chemokines. Chromatin immunoprecipitation and luciferase reporter assay were performed to explore the transactivation of target LncRNA by CAFs. A series of in vitro assays was performed with RNAi-mediated knockdown to elucidate the function of LncRNA. An orthotopic mouse model of MDA-MB-231 was conducted to confirm the mechanism in vivo. Results Here we reported that TGF-β1 was top one highest level of cytokine secreted by CAFs as revealed by cytokine antibody array. Paracrine TGF-β1 was essential for CAFs induced EMT and metastasis in breast cancer cells, which is a crucial mediator of the interaction between stromal and cancer cells. CAF-CM significantly enhanced the HOTAIR expression to promote EMT, whereas treatment with small-molecule inhibitors of TGF-β1 attenuated the activation of HOTAIR. Most importantly, SMAD2/3/4 directly bound the promoter site of HOTAIR, located between nucleotides -386 and -398, -440 and -452, suggesting that HOTAIR was a directly transcriptional target of SMAD2/3/4. Additionally, CAFs mediated EMT by targeting CDK5 signaling through H3K27 tri-methylation. Depletion of HOTAIR inhibited CAFs-induced tumor growth and lung metastasis in MDA-MB-231 orthotopic animal model. Conclusions Our findings demonstrated that CAFs promoted the metastatic activity of breast cancer cells by activating the transcription of HOTAIR via TGF-β1 secretion, supporting the pursuit of the TGF-β1/HOTAIR axis as a target in breast cancer treatment. Electronic supplementary material The online version of this article (10.1186/s12943-018-0758-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yu Ren
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Huan-Huan Jia
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Yi-Qi Xu
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Xuan Zhou
- Department of Head and Neck, Tianjin Medical University Cancer Hospital, Tianjin, 300060, China
| | - Xiao-Hui Zhao
- Department of Obstetrics and Gynecology, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - Yun-Fei Wang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Lab of Neuro- oncology, Tianjin Neurological Institute, Key Laboratory of Post-Neuroinjury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China
| | - Xin Song
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Zhi-Yan Zhu
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Ting Sun
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Yan Dou
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Wei-Ping Tian
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Xiu-Lan Zhao
- Department of Pathology, Tianjin Medical University, Tianjin, 300070, China
| | - Chun-Sheng Kang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Lab of Neuro- oncology, Tianjin Neurological Institute, Key Laboratory of Post-Neuroinjury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China
| | - Mei Mei
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China.
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9
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Wei JW, Cai JQ, Fang C, Tan YL, Huang K, Yang C, Chen Q, Jiang CL, Kang CS. Signal Peptide Peptidase, Encoded by HM13, Contributes to Tumor Progression by Affecting EGFRvIII Secretion Profiles in Glioblastoma. CNS Neurosci Ther 2017; 23:257-265. [PMID: 28198167 DOI: 10.1111/cns.12672] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 12/06/2016] [Accepted: 12/08/2016] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND AND AIMS EGFRvIII is the most prevalent glioblastoma mutation, occurring in more than 25% of glioblastomas. EGFRvIII cells release microvesicles that contain proteins, miRNAs, and mRNAs that enhance the growth and survival of surrounding tumor cells. However, little is known about the maturation process and regulatory mechanisms of secreted vesicles in EGFRvIII cells. METHODS Signal peptide peptidase (SPP) provides a fascinating mechanism for protein cleavage and subsequent dislocation in the endoplasmic reticulum transmembrane domain. RESULTS In this study, we reported that SPP facilitates the secretion of cytokines in vitro and promotes tumor progression in mice. Human cytokine antibody arrays revealed that EGFRvIII secreted higher levels of cytokines, but these levels were significantly reduced following SPP knockdown, suggesting that cytokines in EGFRvIII secretion profiles play important roles in GBM development. Identical results were confirmed in intracellular maturation tracking of TGF-β1 in mouse serum. Clinically, analyses of GBM patient data from the database revealed that HM13 expression was closely related to patient prognosis and survival, suggesting an influence by the secreted vesicles of EGFRvIII tumor cells. CONCLUSIONS Collectively, our study identifies that SPP affects EGFRvIII secretion profiles and thus promotes tumor progression, providing further understanding of the formation of secreted vesicles and driving role of EGFRvIII in GBM.
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Affiliation(s)
- Jian-Wei Wei
- Department of Neurosurgery, Laboratory of Neuro-oncology, Tianjin Neurological Institute, Key Laboratory of Post-Neuro injury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Medical University General Hospital, Tianjin, China
| | - Jin-Quan Cai
- Department of Neurosurgery, The Second Affiliated Hospital of Harbin Medical University, NanGang District, Harbin, Heilongjiang Province, China
| | - Chuan Fang
- Department of Neurosurgery, The Hospital affiliated to Hebei University, Baoding, China
| | - Yan-Li Tan
- College of Fundamental Medicine, Hebei University, Baoding, China
| | - Kai Huang
- Department of Neurosurgery, Laboratory of Neuro-oncology, Tianjin Neurological Institute, Key Laboratory of Post-Neuro injury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Medical University General Hospital, Tianjin, China
| | - Chao Yang
- Department of Neurosurgery, Laboratory of Neuro-oncology, Tianjin Neurological Institute, Key Laboratory of Post-Neuro injury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Medical University General Hospital, Tianjin, China
| | - Qun Chen
- Department of Neurosurgery, The Second Affiliated Hospital of Harbin Medical University, NanGang District, Harbin, Heilongjiang Province, China
| | - Chuan-Lu Jiang
- Department of Neurosurgery, The Second Affiliated Hospital of Harbin Medical University, NanGang District, Harbin, Heilongjiang Province, China
| | - Chun-Sheng Kang
- Department of Neurosurgery, Laboratory of Neuro-oncology, Tianjin Neurological Institute, Key Laboratory of Post-Neuro injury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Medical University General Hospital, Tianjin, China
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10
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Yang C, Li YS, Wang QX, Huang K, Wei JW, Wang YF, Zhou JH, Yi KK, Zhang KL, Zhou BC, Liu C, Zeng L, Kang CS. EGFR/EGFRvIII remodels the cytoskeleton via epigenetic silencing of AJAP1 in glioma cells. Cancer Lett 2017. [PMID: 28634045 DOI: 10.1016/j.canlet.2017.06.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
EGFR amplification and mutations are the most common oncogenic events in GBM. EGFR overexpression correlates with GBM invasion, but the underlying mechanisms are poorly understood. In a previous study, we showed that AJAP1 is involved in regulating F-actin to inhibit the invasive ability of GBM. In addition, in a GBM cell line, the AJAP1 promoter was highly bound by H3K27me3 and, through bioinformatics analysis, we found that AJAP1 expression was negatively correlated with EGFR. In this study, we found that the pathway downstream of EGFR had a higher activation level in GBM cell lines, which led to excessive tumor suppressor silencing. Therefore, we deduced that in glioma cells, the pathway downstream of EGFR remodels the cytoskeleton via AJAP1 epigenetic silencing to enhance invasion. Furthermore, MK2206 reversed AJAP1 downregulation by inhibiting the EGFR pathway. In vivo, MK2206 also inhibited the proliferation and local invasion of 87-EGFRvIII. These data suggest that activation of the EGFR signal transduction pathway genetically silences anti-oncogenes to enhance GBM malignancy. MK2206 might be a promising therapeutic for EGFR/EGFRvIII-positive GBMs.
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Affiliation(s)
- Chao Yang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin 300052, China
| | - Yan-Sheng Li
- Department of Neurosurgery, Tianjin Medical University General Hospital, Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin 300052, China
| | - Qi-Xue Wang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin 300052, China
| | - Kai Huang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin 300052, China
| | - Jian-Wei Wei
- Department of Neurosurgery, Tianjin Medical University General Hospital, Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin 300052, China
| | - Yun-Fei Wang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin 300052, China
| | - Jun-Hu Zhou
- Department of Neurosurgery, Tianjin Medical University General Hospital, Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin 300052, China
| | - Kai-Kai Yi
- Department of Neurosurgery, Tianjin Medical University General Hospital, Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin 300052, China
| | - Kai-Liang Zhang
- Department of Neurosurgery, Qilu Hospital of Shandong University, Brain Science Research Institute, Shandong University, China
| | - Bing-Cong Zhou
- Department of Neurosurgery, Tianjin Medical University General Hospital, Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin 300052, China
| | - Cong Liu
- Department of Neurosurgery, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, PR China
| | - Liang Zeng
- Department of Neurosurgery, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, PR China.
| | - Chun-Sheng Kang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin 300052, China.
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11
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Wang FYF, Kang CS, Wang-Gou SY, Huang CH, Feng CY, Li XJ. EGFL7 is an intercellular EGFR signal messenger that plays an oncogenic role in glioma. Cancer Lett 2017; 384:9-18. [PMID: 27725228 DOI: 10.1016/j.canlet.2016.10.009] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 09/28/2016] [Accepted: 10/02/2016] [Indexed: 11/15/2022]
Abstract
Epidermal Growth Factor like domain 7 (EGFL7), also known as Vascular Endothelial-statin (VE-statin), is a secreted angiogenic factor. Recent data have demonstrated the potential oncogenic role and prognostic significance of EGFL7 in several human cancers. However, the clinical signature and further mechanisms of EGFL7's function in gliomagenesis are poorly understood. In the present study, we found that increased EGFL7 expression was associated with tumor grade. High expression of EGFL7 in EGFRvIII-positive glioblastoma multiforme (GBM) was determined to be a strong and independent risk factor for reduced life expectancy. EGFRvIII cells can secrete the EGFL7 protein to improve the activity of the β-catenin/TCF4 Transcription complex in EGFRwt cells, thus promoting their own EGFL7 expression. Our research demonstrates that oncogenic activation of EGFRwt in GBM is likely maintained by a continuous EGFL7 autocrine flow line, and may be an attractive target for therapeutic intervention.
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Affiliation(s)
- Fei-Yi-Fan Wang
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Chun-Sheng Kang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Si-Yi Wang-Gou
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Chun-Hai Huang
- Department of Neurosurgery, The First Affiliated Hospital of Jishou University, Jishou 416000, China
| | - Cheng-Yuan Feng
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Xue-Jun Li
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha 410008, China.
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12
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Wei JW, Huang K, Yang C, Kang CS. Non-coding RNAs as regulators in epigenetics. Oncol Rep 2016; 37:3-9. [DOI: 10.3892/or.2016.5236] [Citation(s) in RCA: 345] [Impact Index Per Article: 43.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Accepted: 11/02/2016] [Indexed: 01/17/2023] Open
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13
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Kang CS, Lee HH, Oh S, Lee SG, Wi HM, Kim YS, Kim HS. Study on the heat flux reconstruction with the infrared thermography for the divertor target plates in the KSTAR tokamak. Rev Sci Instrum 2016; 87:083508. [PMID: 27587124 DOI: 10.1063/1.4961030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
An infrared (IR) thermography is the preferred diagnostic that can quantify heat flux by measuring the surface temperature distributions of the divertor plates. The IR thermography is successfully instrumented on Korea Superconducting Tokamak Advanced Research (KSTAR). In this study, finite volume method is considered to solve the heat conduction equations. 1D-, 2D-, and 3D models are developed and compared with various calculation algorithms, such as Duhamel's theorem and THEODOR. These comparisons show good agreement. In order to acquire more efficient and reliable calculation results, we consider two numerical analysis schemes, influence of temperature on thermal properties and image stabilization. Recently, this reconstruction code is successfully applied to the KSTAR IR thermography.
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Affiliation(s)
- C S Kang
- National Fusion Research Institute, Daejeon 305-806, South Korea
| | - H H Lee
- National Fusion Research Institute, Daejeon 305-806, South Korea
| | - S Oh
- National Fusion Research Institute, Daejeon 305-806, South Korea
| | - S G Lee
- National Fusion Research Institute, Daejeon 305-806, South Korea
| | - H M Wi
- National Fusion Research Institute, Daejeon 305-806, South Korea
| | - Y S Kim
- National Fusion Research Institute, Daejeon 305-806, South Korea
| | - H S Kim
- National Fusion Research Institute, Daejeon 305-806, South Korea
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14
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Wei JW, Cui JQ, Zhou X, Fang C, Tan YL, Chen LY, Yang C, Liu M, Kang CS. F25P preproinsulin abrogates the secretion of pro-growth factors from EGFRvIII cells and suppresses tumor growth in an EGFRvIII/wt heterogenic model. Cancer Lett 2016; 380:1-9. [PMID: 27317648 DOI: 10.1016/j.canlet.2016.06.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 05/11/2016] [Accepted: 06/12/2016] [Indexed: 01/09/2023]
Abstract
Extensive heterogeneity is a defining hallmark of glioblastoma multiforme (GBM) at the cellular and molecular levels. EGFRvIII, the most common EGFR mutant, is expressed in 24-67% of cases and strongly indicates a poor survival prognosis. By co-expressing EGFRvIII and EGFRwt, we established an EGFRvIII/wt heterogenic model. Using this approach, we confirmed that a mixture of EGFRvIII and EGFRwt at a certain ratio could clearly enhance tumor growth in vitro and in vivo compared with EGFRwt cells, thereby indicating that EGFRvIII cells promote tumor growth. Furthermore, we demonstrated that the EGFRvIII cells could support the growth of EGFRwt cells by secreting growth factors, thus acting as the principal source for maintaining tumor survival. F25P preproinsulin effectively reduced the concentrations of EGF, VEGF, and MMP-9 in the blood of tumor-bearing mice by competitively inhibiting the endoplasmic reticulum signal peptidase and increased the overall survival in orthotopic models. Taken together, our results provided an effective therapy of F25P preproinsulin in the EGFRvIII/wt heterogenic model.
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Affiliation(s)
- Jian-Wei Wei
- Department of Neurosurgery, Tianjin Medical University General Hospital, Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin 300052, China
| | - Jing-Qiu Cui
- Department of Endocrinology and Metabolism, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Xuan Zhou
- Department of Head & Neck, Tianjin Cancer Institute and Hospital, Tianjin 300060, China
| | - Chuan Fang
- Department of Neurosurgery, The Hospital affiliated to Hebei University, Baoding 071000, China
| | - Yan-Li Tan
- College of Fundamental Medicine, Hebei University, Baoding 071000, China
| | - Lu-Yue Chen
- Department of Neurosurgery, Tianjin Medical University General Hospital, Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin 300052, China
| | - Chao Yang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin 300052, China
| | - Ming Liu
- Department of Endocrinology and Metabolism, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Chun-Sheng Kang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin 300052, China.
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15
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Ren Y, Zhou X, Liu X, Jia HH, Zhao XH, Wang QX, Han L, Song X, Zhu ZY, Sun T, Jiao HX, Tian WP, Yang YQ, Zhao XL, Zhang L, Mei M, Kang CS. Reprogramming carcinoma associated fibroblasts by AC1MMYR2 impedes tumor metastasis and improves chemotherapy efficacy. Cancer Lett 2016; 374:96-106. [PMID: 26872723 DOI: 10.1016/j.canlet.2016.02.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 02/01/2016] [Accepted: 02/01/2016] [Indexed: 12/09/2022]
Abstract
Carcinoma associated fibroblasts (CAFs) produce a nutrient-rich microenvironment to fuel tumor progression and metastasis. Reactive oxygen species (ROS) levels and the inflammation pathway co-operate to transform CAFs. Therefore, elucidating the mechanism mediating the activity of CAFs might identify novel therapies. Abnormal miR-21 expression was reported to be involved in the conversion of resident fibroblasts to CAFs, yet the factor that drives transformation was poorly understood. Here, we reported that high miR-21 expression was strongly associated with lymph node metastasis in breast cancer, and the activation of the miR-21/NF-кB was required for the metastatic promoting effect of CAFs. AC1MMYR2, a small molecule inhibitor of miR-21, attenuated NF-кB activity by directly targeting VHL, thereby blocking the co-precipitation of NF-кB and ß-catenin and nuclear translocation. Taxol failed to constrain the aggressive behavior of cancer cells stimulated by CAFs, whereas AC1MMYR2 plus taxol significantly suppressed tumor migration and invasion ability. Remodeling and depolarization of F-actin, decreased levels of β-catenin and vimentin, and increased E-cadherin were also detected in the combination therapy. Furthermore, reduced levels of FAP-α and α-SMA were observed, suggesting that AC1MMYR2 was competent to reprogram CAFs via the NF-кB/miR-21/VHL axis. Strikingly, a significant reduction of tumor growth and lung metastasis was observed in the combination treated mice. Taken together, our findings identified miR-21 as a critical mediator of metastasis in breast cancer through the tumor environment. AC1MMYR2 may be translated into the clinic and developed as a more personalized and effective neoadjuvant treatment for patients to reduce metastasis and improve the chemotherapy response.
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Affiliation(s)
- Yu Ren
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China; Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, China; Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Tianjin 300052, China
| | - Xuan Zhou
- Department of Head and Neck, Tianjin Cancer Institute and Hospital, Tianjin 300060, China
| | - Xia Liu
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Huan-Huan Jia
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Xiao-Hui Zhao
- Department of Obstetrics and Gynecology, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Qi-Xue Wang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, China; Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Tianjin 300052, China
| | - Lei Han
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, China; Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Tianjin 300052, China
| | - Xin Song
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Zhi-Yan Zhu
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Ting Sun
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Hong-Xiao Jiao
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Wei-Ping Tian
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Yu-Qi Yang
- Department of Pharmacy, Tianjin Medical University, Tianjin 300070, China
| | - Xiu-Lan Zhao
- Department of Pathology, Tianjin Medical University, Tianjin 300070, China
| | - Lun Zhang
- Department of Head and Neck, Tianjin Cancer Institute and Hospital, Tianjin 300060, China
| | - Mei Mei
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China.
| | - Chun-Sheng Kang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, China; Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Tianjin 300052, China.
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16
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Ning XH, Guo R, Han L, Zhang AL, Liu X, Li ZX, Kang CS, Zhang QY. [DZNep raises miR-200c expression to delay the invasion and migration of MGC-803 gastric carcinoma cells]. Sheng Li Xue Bao 2015; 67:83-89. [PMID: 25672630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The aim of the present study was to investigate the regulatory effects of histone methylation modifications on the expression of miR-200c, as well as invasion and migration of gastric carcinoma cells. Gastric carcinoma cell line, MGC-803, were treated by 2.5 μmol/L histone methyltransferase inhibitor, DZNep. The expression of miR-200c was detected by real-time quantitative PCR (qRT-PCR). The epithelial-mesenchymal transition (EMT) indicators (ZEB1/2 and E/N-cadherin), EZH2, EED, SUZ12 and H3K27me3 expressions were detected by Western blot. Cell migration and invasion abilities were detected by Transwell and scratch tests. The result showed that, compared with DMSO (control) group, DZNep significantly increased the expression of miR-200c to about 2.1 times, inhibited ZEB1, ZEB2, and N-cadherin expressions, and activated E-cadherin expression; Also, DZNep decreased the protein expressions of EZH2, EED, SUZ12 and H3K27me3; Moreover, DZNep could inhibit MGC-803 cell invasive and migrative abilities, as well as MMP9 expression. These results suggest DZNep raises miR-200c expression to delay the invasion and migration of gastric carcinoma cells, and the underlying mechanisms involve the regulations of EMT-related proteins and polycomb repressive complex 2.
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Affiliation(s)
- Xiang-Hong Ning
- Department of Gastroenterology, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Rong Guo
- Department of Gastroenterology, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Lei Han
- Department of Neurosurgery, Tianjin Medical University General Hospital and Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Tianjin 300052, China
| | - An-Ling Zhang
- Department of Neurosurgery, Tianjin Medical University General Hospital and Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Tianjin 300052, China
| | - Xi Liu
- Department of Gastroenterology, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Zhao-Xia Li
- Department of Gastroenterology, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Chun-Sheng Kang
- Department of Neurosurgery, Tianjin Medical University General Hospital and Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Tianjin 300052, China
| | - Qing-Yu Zhang
- Department of Gastroenterology, Tianjin Medical University General Hospital, Tianjin 300052, China.
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17
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Abstract
The divertor Infrared television (IR TV) system for monitoring the temperature of a divertor and localized hot spots will be installed on the upper port of the N-port in the Korea Superconducting Tokamak Advanced Research (KSTAR). The cassette of KSTAR makes a periscope inevitable for the divertor IR TV. In this article, 4 design concepts for the periscope were examined, and the design based on Keplerian was shown to have better stabilities in alignment and the vibration. The final optics design based on an f-theta lens, Keplerian, and telecentric lens was derived.
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Affiliation(s)
- S Oh
- National Fusion Research Institute, 113 Gwahangno, Daejeon 305-333, South Korea
| | - K Lee
- CVI Optics Co., Ltd, Samjeong-dong, Bucheon-si 421-809, South Korea
| | - H H Lee
- National Fusion Research Institute, 113 Gwahangno, Daejeon 305-333, South Korea
| | - H M Wi
- National Fusion Research Institute, 113 Gwahangno, Daejeon 305-333, South Korea
| | - Y S Kim
- National Fusion Research Institute, 113 Gwahangno, Daejeon 305-333, South Korea
| | - C S Kang
- Department of Plasma Physics and Nuclear Fusion, Korea University of Science and Technology, Daejeon 305-350, South Korea
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18
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Ge XT, Lei P, Wang HC, Zhang AL, Han ZL, Chen X, Li SH, Jiang RC, Kang CS, Zhang JN. miR-21 improves the neurological outcome after traumatic brain injury in rats. Sci Rep 2014; 4:6718. [PMID: 25342226 PMCID: PMC4208064 DOI: 10.1038/srep06718] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 10/03/2014] [Indexed: 01/20/2023] Open
Abstract
The expression levels of microRNAs (miRNAs) including miR-21, have been reported to change in response to traumatic brain injury (TBI), suggesting that they may influence the pathophysiological process in brain injury. To analyze the potential effect of miR-21 on neurological function after TBI, we employed the fluid percussion injury rat model and manipulated the expression level of miR-21 in brain using intracerebroventricular infusion of miR-21 agomir or antagomir. We found that upregulation of miR-21 level in brain conferred a better neurological outcome after TBI by improving long-term neurological function, alleviating brain edema and decreasing lesion volume. To further investigate the mechanism underlying this protective effect, we evaluated the impact of miR-21 on apoptosis and angiogenesis in brain after TBI. We found that miR-21 inhibited apoptosis and promoted angiogenesis through regulating the expression of apoptosis- and angiogenesis-related molecules. In addition, the expression of PTEN, a miR-21 target gene, was inhibited and Akt signaling was activated in the procedure. Taken together, these data indicate that miR-21 could be a potential therapeutic target for interventions after TBI.
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Affiliation(s)
- Xin-Tong Ge
- 1] Laboratory of Neuro-Trauma, Tianjin Neurological Institute, Tianjin, China [2] Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, China; Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, Tianjin, China [3] Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Ping Lei
- 1] Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, China; Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, Tianjin, China [2] Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China [3] Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China; Laboratory of Neuro-Trauma and Neurodegenerative Disorders, Tianjin Geriatrics Institute, Tianjin, China
| | - Hai-Chen Wang
- Department of Neurology, Duke University School of Medicine, Durham, North Carolina, U.S.A
| | - An-Ling Zhang
- 1] Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, China; Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, Tianjin, China [2] Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China [3] Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Tianjin, China
| | - Zhao-Li Han
- 1] Laboratory of Neuro-Trauma, Tianjin Neurological Institute, Tianjin, China [2] Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, China; Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, Tianjin, China [3] Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China; Laboratory of Neuro-Trauma and Neurodegenerative Disorders, Tianjin Geriatrics Institute, Tianjin, China
| | - Xin Chen
- 1] Laboratory of Neuro-Trauma, Tianjin Neurological Institute, Tianjin, China [2] Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, China; Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, Tianjin, China [3] Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Sheng-Hui Li
- 1] Laboratory of Neuro-Trauma, Tianjin Neurological Institute, Tianjin, China [2] Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, China; Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, Tianjin, China [3] Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Rong-Cai Jiang
- 1] Laboratory of Neuro-Trauma, Tianjin Neurological Institute, Tianjin, China [2] Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, China; Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, Tianjin, China [3] Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Chun-Sheng Kang
- 1] Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, China; Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, Tianjin, China [2] Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China [3] Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Tianjin, China
| | - Jian-Ning Zhang
- 1] Laboratory of Neuro-Trauma, Tianjin Neurological Institute, Tianjin, China [2] Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, China; Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, Tianjin, China [3] Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
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Han L, Zhang KL, Zhang JX, Zeng L, Di CH, Fee B, Rivas M, Jiang T, Bigner D, Kang CS, Adamson DC. Abstract 1561: AJAP1 is dysregulated at an early stage of gliomagenesis and suppresses invasion through cytoskeleton reorganization. Cancer Res 2014. [DOI: 10.1158/1538-7445.am2014-1561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background
Glioblastoma (GBM) is the most common malignant primary brain tumor in adults and is a leading cause of cancer-related death due to its invasive nature. Despite advances in radiation and chemotherapy following surgical resection of the tumor, the prognosis of GBM remains poor with an average survival time of less than one year. Accumulating evidence indicates the existence of tumor suppressor-like genes encoded on the 1p36 region. Recent investigations have reported Adherens Junctional Associated Protein-1 (AJAP1, also known as Shrew1) as another tumor suppressor-like gene on chromosome 1 in the 1p36 region. We and others also demonstrated that the AJAP1 promoter was highly methylated in a wide spectrum of glioma cell lines, and the loss of expression was associated with poorer survival in gliomas patients. However, the altered expression profiles of AJAP1 in gliomas as well as the underlying mechanisms of AJAP1 on glial cell migration and invasion are still poorly understood.
Methods
The gene profiles of AJAP1 in glioma patients were studied among four independent cohorts. Confocal imaging was used to analyze the AJAP1 localization. After AJAP1 over-expression in GBM cell lines, cellular polarity, cytoskeleton distribution, and anti-tumor effect were investigated in vitro and in vivo.
Results
AJAP1 expression was significantly decreased in gliomas compared with normal brain in REMBRANDT and CGCA cohorts. Additionally, low AJAP1 expression was associated with worse survival in GBMs in REMBRANDT and TCGA U133A cohorts and was significantly associated with classical and mesenchymal subtypes of GBMs among four cohorts. Confocal imaging indicated AJAP1 localized in cell membranes in low-grade gliomas and AJAP1 over-expressing GBM cells, but difficult to assess in high-grade gliomas due to its absence. AJAP1 over-expression altered the cytoskeleton and cellular morphology in vitro, and inhibited the tumor growth in vivo. Conclusion
In summary, gene profiling of gliomas showed that dysregulated AJAP1 exists in the early stage of gliomagenesis. In particular, AJAP1 expression is associated with low and high tumor grades, as well as the clinical outcome of patients with GBMs. Its over-expression predicts poor clinical outcome and may serve as a promising biomarker for intensive therapy, especially in Classical and Mesenchymal GBM patients. Few studies have investigated the function of AJAP1 and cytoskeleton regulation in gliomas. Further studies are warranted to explore the biological functions of AJAP1 that may improve our understanding of the initiation of gliomas and development of new biomarker and therapeutic target for individualized therapy of GBM.
Citation Format: Lei Han, Kai-Liang Zhang, Jun-Xia Zhang, Liang Zeng, Chun-Hui Di, Brian Fee, Miriam Rivas, Tao Jiang, Darrell Bigner, Chun-Sheng Kang, David Cory Adamson. AJAP1 is dysregulated at an early stage of gliomagenesis and suppresses invasion through cytoskeleton reorganization. [abstract]. In: Proceedings of the 105th Annual Meeting of the American Association for Cancer Research; 2014 Apr 5-9; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2014;74(19 Suppl):Abstract nr 1561. doi:10.1158/1538-7445.AM2014-1561
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Affiliation(s)
- Lei Han
- 1Tianjin Medical University General Hospital, Tianjin, China
| | - Kai-Liang Zhang
- 1Tianjin Medical University General Hospital, Tianjin, China
| | - Jun-Xia Zhang
- 2Department of Neurosurgery, the First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Liang Zeng
- 3Preston Robert Tisch Brain Tumor Center, Departments of Surgery and Neurobiology, Duke University Medical Center, Durham, NC
| | - Chun-Hui Di
- 3Preston Robert Tisch Brain Tumor Center, Departments of Surgery and Neurobiology, Duke University Medical Center, Durham, NC
| | - Brian Fee
- 3Preston Robert Tisch Brain Tumor Center, Departments of Surgery and Neurobiology, Duke University Medical Center, Durham, NC
| | - Miriam Rivas
- 3Preston Robert Tisch Brain Tumor Center, Departments of Surgery and Neurobiology, Duke University Medical Center, Durham, NC
| | - Tao Jiang
- 4Department of Neurosurgery, Tiantan Hospital, Capital Medical University, Beijing, China
| | - Darrell Bigner
- 5Preston Robert Tisch Brain Tumor Center, Departments of Pathology, Duke University Medical Center, Durham, NC
| | - Chun-Sheng Kang
- 1Tianjin Medical University General Hospital, Tianjin, China
| | - David Cory Adamson
- 3Preston Robert Tisch Brain Tumor Center, Departments of Surgery and Neurobiology, Duke University Medical Center, Durham, NC
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Bao ZS, Chen HM, Yang MY, Zhang CB, Yu K, Ye WL, Hu BQ, Yan W, Zhang W, Akers J, Ramakrishnan V, Li J, Carter B, Liu YW, Hu HM, Wang Z, Li MY, Yao K, Qiu XG, Kang CS, You YP, Fan XL, Song WS, Li RQ, Su XD, Chen CC, Jiang T. RNA-seq of 272 gliomas revealed a novel, recurrent PTPRZ1-MET fusion transcript in secondary glioblastomas. Genome Res 2014; 24:1765-73. [PMID: 25135958 PMCID: PMC4216918 DOI: 10.1101/gr.165126.113] [Citation(s) in RCA: 274] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Studies of gene rearrangements and the consequent oncogenic fusion proteins have laid the foundation for targeted cancer therapy. To identify oncogenic fusions associated with glioma progression, we catalogued fusion transcripts by RNA-seq of 272 gliomas. Fusion transcripts were more frequently found in high-grade gliomas, in the classical subtype of gliomas, and in gliomas treated with radiation/temozolomide. Sixty-seven in-frame fusion transcripts were identified, including three recurrent fusion transcripts: FGFR3-TACC3, RNF213-SLC26A11, and PTPRZ1-MET (ZM). Interestingly, the ZM fusion was found only in grade III astrocytomas (1/13; 7.7%) or secondary GBMs (sGBMs, 3/20; 15.0%). In an independent cohort of sGBMs, the ZM fusion was found in three of 20 (15%) specimens. Genomic analysis revealed that the fusion arose from translocation events involving introns 3 or 8 of PTPRZ and intron 1 of MET. ZM fusion transcripts were found in GBMs irrespective of isocitrate dehydrogenase 1 (IDH1) mutation status. sGBMs harboring ZM fusion showed higher expression of genes required for PIK3CA signaling and lowered expression of genes that suppressed RB1 or TP53 function. Expression of the ZM fusion was mutually exclusive with EGFR overexpression in sGBMs. Exogenous expression of the ZM fusion in the U87MG glioblastoma line enhanced cell migration and invasion. Clinically, patients afflicted with ZM fusion harboring glioblastomas survived poorly relative to those afflicted with non-ZM-harboring sGBMs (P < 0.001). Our study profiles the shifting RNA landscape of gliomas during progression and reveled ZM as a novel, recurrent fusion transcript in sGBMs.
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Affiliation(s)
- Zhao-Shi Bao
- Beijing Neurosurgical Institute, Beijing 100050, China; Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China; Chinese Glioma Cooperative Group (CGCG), Beijing 100050, China
| | - Hui-Min Chen
- Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, Peking University, Beijing 100871, China;
| | - Ming-Yu Yang
- Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, Peking University, Beijing 100871, China
| | - Chuan-Bao Zhang
- Beijing Neurosurgical Institute, Beijing 100050, China; Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China; Chinese Glioma Cooperative Group (CGCG), Beijing 100050, China
| | - Kai Yu
- Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, Peking University, Beijing 100871, China
| | - Wan-Lu Ye
- Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, Peking University, Beijing 100871, China
| | - Bo-Qiang Hu
- Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, Peking University, Beijing 100871, China
| | - Wei Yan
- Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Wei Zhang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China; Chinese Glioma Cooperative Group (CGCG), Beijing 100050, China
| | - Johnny Akers
- Center for Theoretical and Applied Neuro-Oncology (CTAN), Division of Neurosurgery, University of California, San Diego, California 92093, USA
| | - Valya Ramakrishnan
- Center for Theoretical and Applied Neuro-Oncology (CTAN), Division of Neurosurgery, University of California, San Diego, California 92093, USA
| | - Jie Li
- Center for Theoretical and Applied Neuro-Oncology (CTAN), Division of Neurosurgery, University of California, San Diego, California 92093, USA
| | - Bob Carter
- Center for Theoretical and Applied Neuro-Oncology (CTAN), Division of Neurosurgery, University of California, San Diego, California 92093, USA
| | - Yan-Wei Liu
- Beijing Neurosurgical Institute, Beijing 100050, China; Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China; Chinese Glioma Cooperative Group (CGCG), Beijing 100050, China
| | - Hui-Min Hu
- Beijing Neurosurgical Institute, Beijing 100050, China
| | - Zheng Wang
- Beijing Neurosurgical Institute, Beijing 100050, China; Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China; Chinese Glioma Cooperative Group (CGCG), Beijing 100050, China
| | - Ming-Yang Li
- Beijing Neurosurgical Institute, Beijing 100050, China; Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China; Chinese Glioma Cooperative Group (CGCG), Beijing 100050, China
| | - Kun Yao
- Chinese Glioma Cooperative Group (CGCG), Beijing 100050, China; Department of Pathology, Beijing Sanbo Brain Hospital, Capital Medical University, Beijing 100093, China
| | - Xiao-Guang Qiu
- Chinese Glioma Cooperative Group (CGCG), Beijing 100050, China; Department of Radiotherapy, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China
| | - Chun-Sheng Kang
- Chinese Glioma Cooperative Group (CGCG), Beijing 100050, China; Department of Neurosurgery, Tianjin Medical University General Hospital, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin 300052, China
| | - Yong-Ping You
- Chinese Glioma Cooperative Group (CGCG), Beijing 100050, China; Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Xiao-Long Fan
- Laboratory of Neuroscience and Brain Development, Beijing Key Laboratory of Gene Resources and Molecular Development, Beijing Normal University, Beijing 100875, China
| | - Wei Sonya Song
- Beijing Neurosurgical Institute, Beijing 100050, China; Center of Brain Tumor, Beijing Institute for Brain Disorders, Beijing 100069, China
| | - Rui-Qiang Li
- Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, Peking University, Beijing 100871, China
| | - Xiao-Dong Su
- Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, Peking University, Beijing 100871, China;
| | - Clark C Chen
- Center for Theoretical and Applied Neuro-Oncology (CTAN), Division of Neurosurgery, University of California, San Diego, California 92093, USA;
| | - Tao Jiang
- Beijing Neurosurgical Institute, Beijing 100050, China; Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China; Chinese Glioma Cooperative Group (CGCG), Beijing 100050, China; Center of Brain Tumor, Beijing Institute for Brain Disorders, Beijing 100069, China; China National Clinical Research Center for Neurological Diseases, Beijing 100050, China
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Shi ZD, Qian XM, Zhang JX, Han L, Zhang KL, Chen LY, Zhou X, Zhang JN, Kang CS. BASI, a potent small molecular inhibitor, inhibits glioblastoma progression by targeting microRNA-mediated β-catenin signaling. CNS Neurosci Ther 2014; 20:830-9. [PMID: 24810017 DOI: 10.1111/cns.12278] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 04/05/2014] [Accepted: 04/07/2014] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND AND AIMS The nuclear localization of β-catenin, a mediator of canonical Wnt signaling, has been indicated in a variety of cancers and is frequently related to tumor progression and metastasis. Therefore, targeting β-catenin is an attractive therapeutic strategy for cancers. METHODS Herein, we identified a natural, small molecule inhibitor of β-catenin signaling, BASI, and evaluated its therapeutic efficacy both in vitro and in orthotopic mouse models of glioma. RESULTS BASI significantly suppressed proliferation and invasion and induced apoptosis in glioblastoma cells and resulted in the remarkable attenuation of orthotopic tumor growth in vivo. Furthermore, we found that BASI altered the expression of several microRNAs, which mediated the posttranscriptional silencing of β-catenin expression either directly or indirectly through a von Hippel-Lindau (VHL)-mediated β-catenin degradation pattern. CONCLUSIONS Taken together, our findings offer preclinical validation of BASI as a promising new type of β-catenin inhibitor with a mechanism of inhibition that has broad potential for the improved treatment of glioblastoma.
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Affiliation(s)
- Zhen-Dong Shi
- Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China; Key Laboratory of Post-Trauma Neuro-Repair and Regeneration in the Central Nervous System, Ministry of Education Tianjin Key Laboratory of Injuries, Variations and Regeneration of the Nervous System, Tianjin, China
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Zhang KL, Zhou X, Han L, Chen LY, Chen LC, Shi ZD, Yang M, Ren Y, Yang JX, Frank TS, Zhang CB, Zhang JX, Pu PY, Zhang JN, Jiang T, Wagner EJ, Li M, Kang CS. MicroRNA-566 activates EGFR signaling and its inhibition sensitizes glioblastoma cells to nimotuzumab. Mol Cancer 2014; 13:63. [PMID: 24650032 PMCID: PMC3999939 DOI: 10.1186/1476-4598-13-63] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2013] [Accepted: 03/11/2014] [Indexed: 01/14/2023] Open
Abstract
Background Epidermal growth factor receptor (EGFR) is amplified in 40% of human glioblastomas. However, most glioblastoma patients respond poorly to anti-EGFR therapy. MicroRNAs can function as either oncogenes or tumor suppressor genes, and have been shown to play an important role in cancer cell proliferation, invasion and apoptosis. Whether microRNAs can impact the therapeutic effects of EGFR inhibitors in glioblastoma is unknown. Methods miR-566 expression levels were detected in glioma cell lines, using real-time quantitative RT-PCR (qRT-PCR). Luciferase reporter assays and Western blots were used to validate VHL as a direct target gene of miR-566. Cell proliferation, invasion, cell cycle distribution and apoptosis were also examined to confirm whether miR-566 inhibition could sensitize anti-EGFR therapy. Results In this study, we demonstrated that miR-566 is up-regulated in human glioma cell lines and inhibition of miR-566 decreased the activity of the EGFR pathway. Lentiviral mediated inhibition of miR-566 in glioblastoma cell lines significantly inhibited cell proliferation and invasion and led to cell cycle arrest in the G0/G1 phase. In addition, we identified von Hippel-Lindau (VHL) as a novel functional target of miR-566. VHL regulates the formation of the β-catenin/hypoxia-inducible factors-1α complex under miR-566 regulation. Conclusions miR-566 activated EGFR signaling and its inhibition sensitized glioblastoma cells to anti-EGFR therapy.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Eric J Wagner
- Department of Neurosurgery, Tianjin Medical University General Hospital; Laboratory of Neuro-Oncology, Tianjin Neurological Institute; Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education; Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin 300052, China.
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Kanniah KD, sheikhi A, Kang CS. Exploring the role of green and blue infrastructure in reducing temperature in Iskandar Malaysia using remote sensing approach. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/1755-1315/18/1/012156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Han L, Zhang KL, Zhang JX, Zeng L, Di CH, Fee BE, Rivas M, Bao ZS, Jiang T, Bigner D, Kang CS, Adamson DC. AJAP1 is dysregulated at an early stage of gliomagenesis and suppresses invasion through cytoskeleton reorganization. CNS Neurosci Ther 2014; 20:429-37. [PMID: 24483339 DOI: 10.1111/cns.12232] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Revised: 01/06/2014] [Accepted: 01/07/2014] [Indexed: 01/21/2023] Open
Abstract
AIMS Down-regulation of AJAP1 in glioblastoma multiforme (GBM) has been reported. However, the expression profiles of AJAP1 in gliomas and the underlying mechanisms of AJAP1 function on invasion are still poorly understood. METHODS The gene profiles of AJAP1 in glioma patients were studied among four independent cohorts. Confocal imaging was used to analyze the AJAP1 localization. After AJAP1 overexpression in GBM cell lines, cellular polarity, cytoskeleton distribution, and antitumor effect were investigated in vitro and in vivo. RESULTS AJAP1 expression was significantly decreased in gliomas compared with normal brain in REMBRANDT and CGCA cohorts. Additionally, low AJAP1 expression was associated with worse survival in GBMs in REMBRANDT and TCGA U133A cohorts and was significantly associated with classical and mesenchymal subtypes of GBMs among four cohorts. Confocal imaging indicated AJAP1 localized in cell membranes in low-grade gliomas and AJAP1-overexpressing GBM cells, but difficult to assess in high-grade gliomas due to its absence. AJAP1 overexpression altered the cytoskeleton and cellular polarity in vitro and inhibited the tumor growth in vivo. CONCLUSIONS AJAP1 is dysregulated at an early stage of gliomagenesis and may suppress glioma cell invasion and proliferation, which suggests that AJAP1 may be a potential diagnostic and prognostic marker for gliomas.
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Affiliation(s)
- Lei Han
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China; Tianjin Neurological Institute, Tianjin, China; Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, China; Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, China
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Zhang JX, Han L, Bao ZS, Wang YY, Chen LY, Yan W, Yu SZ, Pu PY, Liu N, You YP, Jiang T, Kang CS. HOTAIR, a cell cycle-associated long noncoding RNA and a strong predictor of survival, is preferentially expressed in classical and mesenchymal glioma. Neuro Oncol 2013; 15:1595-603. [PMID: 24203894 DOI: 10.1093/neuonc/not131] [Citation(s) in RCA: 190] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Long noncoding RNA Hox transcript antisense intergenic RNA (HOTAIR) has been characterized as a negative prognostic factor in breast and colon cancer patients. The clinical significance and function of HOTAIR in glioma remains unclear. METHODS We analyzed the clinical significance of HOTAIR in 3 different glioma cohorts with gene expression data, including correlation with tumor grade, prognosis, and molecular subtype. The function of HOTAIR in glioma was explored by performing gene set enrichment analysis and in vitro and in vivo experiments. RESULTS HOTAIR expression was closely associated with glioma grade and poor prognosis. Multivariate Cox regression analysis revealed that HOTAIR was an independent prognostic factor in glioblastoma multiforme patients. HOTAIR expression correlated with glioma molecular subtype, including those of The Cancer Genome Atlas. HOTAIR was preferentially expressed in the classical and mesenchymal subtypes compared with the neural and proneural subtypes. A gene set enrichment analysis designed to show gene set differences between patients with high and low HOTAIR expression indicated that HOTAIR expression was associated with gene sets involved in cell cycle progression. HOTAIR reduction induced colony formation suppression, cell cycle G0/G1 arrest, and orthotopic tumor growth inhibition. CONCLUSION Our data establish that HOTAIR is an important long noncoding RNA that primarily serves as a prognostic factor for glioma patient survival, as well as a biomarker for identifying glioma molecular subtypes, a critical regulator of cell cycle progression.
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Affiliation(s)
- Jun-Xia Zhang
- Corresponding Authors: Yong-Ping You, PhD, Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing 210029, China. ); Tao Jiang, PhD, Beijing Neurosurgical Institute, Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China, ; Chun-Sheng Kang, PhD, Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China (
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Wang XR, Luo H, Li HL, Cao L, Wang XF, Yan W, Wang YY, Zhang JX, Jiang T, Kang CS, Liu N, You YP. Overexpressed let-7a inhibits glioma cell malignancy by directly targeting K-ras, independently of PTEN. Neuro Oncol 2013; 15:1491-501. [PMID: 24092860 DOI: 10.1093/neuonc/not107] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Altered expression of micro(mi)RNAs has been shown to be associated with tumorigenesis and tumor progression. The expression of phosphatase and tensin homolog (PTEN) plays an important role in glioma and is regarded as a prognostic marker of glioma patients. The goal of this study was to investigate the function of lethal (let)-7a miRNA in glioma cell lines with different PTEN phenotypes. METHODS One hundred ninety-eight glioma tissues were used to profile miRNA expression. RESULTS Let-7a was shown to have lower expression in high-grade glioma than in low-grade glioma. Low expression of let-7a was correlated with poor prognosis of primary glioblastoma patients. We demonstrated that K-ras was a functional target for let-7a to induce cell cycle arrest, apoptosis, and inhibition of cell migration and invasion in vitro. Our further results showed no difference in malignancy inhibition induced by let-7a in 4 glioma cells, including U87 (PTEN null), U251 (PTEN mutant), LN229 (PTEN wild type), and LN229 (PTEN small interfering RNA). The phosphatidylinositol-3 kinase/Akt and mitogen-activated protein kinase/extracellular signal-regulated kinase pathways were inhibited by let-7a, and the inhibition effects had no difference in 4 glioma cells. We demonstrated that let-7a could induce suppression of glioma in vivo by generating a glioma xenograft model. CONCLUSION Our results indicated that let-7a suppresses its target transcript K-ras and inhibits glioma malignancy independent of PTEN expression.
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Affiliation(s)
- Xi-Rui Wang
- Corresponding Authors: Yong-Ping You, PhD, Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China. ); Ning Liu, PhD, Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029 China (
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You G, Feng L, Yan W, Zhang W, Wang YZ, Li SW, Li SW, Li GL, Song YJ, Kang CS, You YP, Jiang T. BCL2A1 is a potential biomarker for postoperative seizure control in patients with low-grade gliomas. CNS Neurosci Ther 2013; 19:882-8. [PMID: 23841872 DOI: 10.1111/cns.12148] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Revised: 06/03/2013] [Accepted: 06/04/2013] [Indexed: 11/29/2022] Open
Abstract
AIMS To identify molecular genetic factors that influence preoperative seizure occurrence and postoperative seizure control in patients with low-grade gliomas (LGGs). METHODS Fifty-four WHO grade II astrocytomas were used for microarray analysis under strict inclusion criteria. The primary endpoint was seizure control at 12 months after surgery. Biological processes were investigated by gene ontology (GO) analysis. Quantitative RT-PCR and immunohistochemistry were used to validate key genes. RESULTS Differentially expressed genes correlated with seizure occurrence failed to significantly distinguish patients with and without a history of seizures. With respect to postoperative seizure control, a transcript profile of 92 genes was identified, which successfully separated patients with good and poor seizure prognosis. GO analysis revealed that the most striking overrepresentation of genes was found in a category of anti-apoptotic genes and their regulation. Increased expression was also observed for genes involved in immune and inflammatory responses. BCL2A1 was proven to be a novel marker associated with seizure prognosis. CONCLUSION Increased anti-apoptotic activity of tumor cells appears to contribute to seizure recurrence after surgery in patients with LGGs. These findings provide insights that may lead to the development of effective treatment strategies for prolonging the survival of patients with LGG in the future.
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Affiliation(s)
- Gan You
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
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Zhang JX, Zhang J, Yan W, Wang YY, Han L, Yue X, Liu N, You YP, Jiang T, Pu PY, Kang CS. Unique genome-wide map of TCF4 and STAT3 targets using ChIP-seq reveals their association with new molecular subtypes of glioblastoma. Neuro Oncol 2013; 15:279-89. [PMID: 23295773 DOI: 10.1093/neuonc/nos306] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Aberrant activation of beta-catenin/TCF4 and STAT3 signaling in glioblastoma multiforme (GBM) has been reported. However, the molecular mechanisms related to this process are still poorly understood. METHODS Genome-wide screening of the binding characteristics of the transcription factors TCF4 and STAT3 in GBM cells was performed by chromatin immunoprecipitation sequencing (ChIP-seq) assay. Hierarchical clustering was used to analyze the association of TCF4 and STAT3 coregulated genes with The Cancer Genome Atlas (TCGA) GBM subtypes (classical, mesenchymal, neural, and proneural). New molecular classification of GBM was proposed and validated in Western and Asian populations. RESULTS We identified 1250 overlapping putative target genes that were coregulated by TCF4 and STAT3. Further, the coregulated genes had the potential to guide TCGA GBM subtypes. Finally, we proposed a new molecular classification of GBM into 2 subtypes (proneural-like and mesenchymal-like) and showed that the new classification could be applied to both Western and Asian populations. In addition, the GBM response to temozolomide therapy differed depending on its subtype; mesenchymal-like GBM benefited, while there was no benefit for proneural-like GBM. CONCLUSIONS This is the first comprehensive study to combine a ChIP-seq assay of TCF4 and STAT3 and data mining of patient cohorts to derive molecular subtypes of GBM.
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Affiliation(s)
- Jun-Xia Zhang
- Tianjin Medical University General Hospital, Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Tianjin, China
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Shi ZD, Qian XM, Liu CY, Han L, Zhang KL, Chen LY, Zhang JX, Pu PY, Yuan XB, Kang CS. Aspirin-/TMZ-coloaded microspheres exert synergistic antiglioma efficacy via inhibition of β-catenin transactivation. CNS Neurosci Ther 2012; 19:98-108. [PMID: 23230963 DOI: 10.1111/cns.12041] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2012] [Revised: 11/01/2012] [Accepted: 11/02/2012] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND AND AIMS Currently temozolomide (TMZ) as a potent agent is widely used to treat the glioblastoma multiforme (GBM), whereas recurrence due to intrinsic or acquired therapeutic resistance often occurs. Combination chemotherapy with TMZ may be a promising therapeutic strategy to improve treatment efficacy. METHODS Aspirin, TMZ, and aspirin-/TMZ-coloaded poly (L-lactide-co-glycolide) (PLGA) microspheres were prepared by spray drying, and cytotoxicities of glioblastoma cells were measured. RESULTS Aspirin microsphere treatment induced slight apoptosis and modestly inhibited proliferation of LN229 and U87 cells in vitro and in vivo through inhibition of β-catenin transactivation. However, aspirin-/TMZ-coloaded microspheres presented synergistic antitumor efficacy compared with single TMZ-loaded microspheres. Aspirin/TMZ microspheres induced more apoptosis and repressed proliferation of LN229 and U87 cells. Corresponding to inhibition of β-catenin signaling, β-catenin/TCF4 transcriptional activity and STAT3 luciferase activity were strongly suppressed, and downstream targets expression was decreased. Furthermore, aspirin/TMZ microsphere intratumoral injection downregulated the expression of β-catenin, TCF4, pAKT, pSTAT3, and PCNA and delayed tumor growth in nude mice harboring subcutaneous LN229 xenografts. CONCLUSIONS Aspirin sensitized TMZ chemotherapy efficacy through inhibition of β-catenin transactivation; furthermore, the coloaded microspheres achieved a sustained release action to reduce the TMZ dosage, offering the potential for improved treatment of glioblastomas.
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Affiliation(s)
- Zhen-Dong Shi
- Laboratory of Neuro-Oncology, Department of Neurosurgery, Tianjin Neurological Institute, Tianjin Medical University General Hospital, China
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Wang YY, Sun G, Luo H, Wang XF, Lan FM, Yue X, Fu LS, Pu PY, Kang CS, Liu N, You YP. MiR-21 modulates hTERT through a STAT3-dependent manner on glioblastoma cell growth. CNS Neurosci Ther 2012; 18:722-8. [PMID: 22709411 DOI: 10.1111/j.1755-5949.2012.00349.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2011] [Revised: 04/12/2012] [Accepted: 04/15/2012] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND AND PURPOSE As an important oncogenic miRNA, miR-21 has been reported to play crucial roles in glioblastoma (GBM) carcinogenesis. However, the precise biological function and molecular mechanism of miR-21 in GBM remain elusive. This study is designed to explore the mechanism of miR-21 involved in the control of GBM cell growth. METHODS AND RESULTS MTT assay, cell cycle analysis, and apoptosis analysis showed that reduction of miR-21 inhibited cell growth in U87 and LN229 GBM cells. Further, reduction of miR-21 decreased the expression of human telomerase reverse transcriptase (hTERT) and repressed STAT3 expression and STAT3 phosphorylation. STAT3 inhibition led to a remarkable depletion of hTERT at both mRNA and protein levels by binding to the hTERT gene promoter by performing luciferase reporter assay and chromatin Immunoprecipitation PCR. Finally, knockdown of miR-21 considerably inhibited tumor growth and diminished the expression of STAT3 and hTERT in xenograft model. CONCLUSION Our findings indicate that miR-21 regulates hTERT expression mediated by STAT3, therefore controlling GBM cell growth.
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Affiliation(s)
- Ying-Yi Wang
- Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, China
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Qian XM, Shi ZD, Ren Y, Liu CY, Ji YR, Long LX, Pu P, Sheng J, Yuan XB, Kang CS. Synergistic inhibition of human glioma cell line by temozolomide and PAMAM-mediated miR-21i. J Appl Polym Sci 2012. [DOI: 10.1002/app.37823] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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You G, Sha ZY, Yan W, Zhang W, Wang YZ, Li SW, Sang L, Wang Z, Li GL, Li SW, Song YJ, Kang CS, Jiang T. Seizure characteristics and outcomes in 508 Chinese adult patients undergoing primary resection of low-grade gliomas: a clinicopathological study. Neuro Oncol 2011; 14:230-41. [PMID: 22187341 DOI: 10.1093/neuonc/nor205] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Seizure is a common presenting manifestation and plays an important role in the clinical presentation and quality of life for patients with low-grade gliomas (LGGs). The authors set out to identify factors that influence preoperative seizure characteristics and postoperative seizure control. Cases involving adult patients who had undergone initial surgery for LGGs in a single institution between 2005 and 2009 were retrospectively reviewed. Univariate and multivariate logistic regression analyses were used to identify factors associated with preoperative seizures and postoperative seizure control. Of the 508 patients in the series, 350 (68.9%) presented with seizures. Age less than 38 years and cortical involvement of tumor were more likely to be associated with seizures (P = .003 and .001, respectively, multivariate logistic analysis). For the cohort of 350 patients with seizures, Engel classification was used to evaluate 6- and 12-month outcome after surgery: completely seizure free (Engel class I), 65.3% and 62.5%; not seizure free (Engel classes II, III, IV), 34.7% and 37.5%. After multivariate logistic analysis, favorable seizure prognosis was more common in patients with secondary generalized seizure (P = .006) and with calcification on MRI (.031). With respect to treatment-related variables, patients achieved much better seizure control after gross total resection than after subtotal resection (P < .0001). Ki67 was an independent molecular marker predicting poor seizure control in the patients with a history of seizure if overexpressed but was not a predictor for those without preoperative seizures. These factors may provide insight into developing effective treatment strategies aimed at prolonging patients' survival.
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Affiliation(s)
- Gan You
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
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Abstract
miRNAs are non-coding, single-stranded RNAs that regulate target gene expression by repressing translation or promoting RNA cleavage. Dicer is an essential component of the miRNA processing machinery. To identify a role for miRNAs in tumorigenesis, we designed an adenovirus expressing small hairpin RNA (shRNA) to silence Dicer and globally suppress the maturation of miRNAs. We identified that the impairment of miRNA processing conferred an enhanced proliferative activity and invasive ability on each of three tumor cell lines in vitro. Inhibition of Dicer was associated with activation of p-Akt and enhanced expression of the cell cycle associating molecules, cyclin A and PCNA, as well as MMP-2 and MMP-9, proteins involved in tumor cell invasion. Adenoviral gene silencing of Dicer in subcutaneous MCF-7 xenografts significantly increased tumor growth in vivo compared to tumors infected with non-loading adenovirus. Increased tumor growth was associated with p-Akt activation and upregulation of cyclin A, PCNA MMP-2 and MMP-9. These findings demonstrate that global reduction of miRNA processing by silencing Dicer enhances tumor proliferation and invasion, and the p-Akt pathway may contribute to this phenotype via the downstream molecules, cyclin A, PCNA, MMP-2 and MMP-9.
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Affiliation(s)
- Lei Han
- Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Tianjin 300052, PR China
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Huang K, Zhang JX, Han L, You YP, Jiang T, Pu PY, Kang CS. MicroRNA roles in beta-catenin pathway. Mol Cancer 2010; 9:252. [PMID: 20858269 PMCID: PMC2955614 DOI: 10.1186/1476-4598-9-252] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2010] [Accepted: 09/21/2010] [Indexed: 02/06/2023] Open
Abstract
β-catenin, a key factor in the Wnt signaling pathway, has essential functions in the regulation of cell growth and differentiation. Aberrant β-catenin signaling has been linked to various disease pathologies, including an important role in tumorigenesis. Here, we review the regulation of the Wnt signaling pathway as it relates to β-catenin signaling in tumorigenesis, with particular focus on the role of microRNAs. Finally, we discuss the potential of β-catenin targeted therapeutics for cancer treatment.
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Affiliation(s)
- Kai Huang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, China
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Zhang CZ, Zhang JX, Zhang AL, Shi ZD, Han L, Jia ZF, Yang WD, Wang GX, Jiang T, You YP, Pu PY, Cheng JQ, Kang CS. MiR-221 and miR-222 target PUMA to induce cell survival in glioblastoma. Mol Cancer 2010; 9:229. [PMID: 20813046 PMCID: PMC2939570 DOI: 10.1186/1476-4598-9-229] [Citation(s) in RCA: 229] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Accepted: 09/02/2010] [Indexed: 02/07/2023] Open
Abstract
Background MiR-221 and miR-222 (miR-221/222) are frequently up-regulated in various types of human malignancy including glioblastoma. Recent studies have reported that miR-221/222 regulate cell growth and cell cycle progression by targeting p27 and p57. However the underlying mechanism involved in cell survival modulation of miR-221/222 remains elusive. Results Here we showed that miR-221/222 inhibited cell apoptosis by targeting pro-apoptotic gene PUMA in human glioma cells. Enforced expression of miR-22/222 induced cell survival whereas knockdown of miR-221/222 rendered cells to apoptosis. Further, miR-221/222 reduced PUMA protein levels by targeting PUMA-3'UTR. Introducing PUMA cDNA without 3'UTR abrogated miR-221/222-induced cell survival. Notably, knockdown of miR-221/222 induces PUMA expression and cell apoptosis and considerably decreases tumor growth in xenograft model. Finally, there was an inverse relationship between PUMA and miR-221/222 expression in glioma tissues. Conclusion To our knowledge, these data indicate for the first time that miR-221/222 directly regulate apoptosis by targeting PUMA in glioblastoma and that miR-221/222 could be potential therapeutic targets for glioblastoma intervention.
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Affiliation(s)
- Chun-Zhi Zhang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, China
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Ren Y, Kang CS, Yuan XB, Zhou X, Xu P, Han L, Wang GX, Jia Z, Zhong Y, Yu S, Sheng J, Pu PY. Co-delivery of as-miR-21 and 5-FU by poly(amidoamine) dendrimer attenuates human glioma cell growth in vitro. J Biomater Sci Polym Ed 2010; 21:303-14. [PMID: 20178687 DOI: 10.1163/156856209x415828] [Citation(s) in RCA: 118] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
MicroRNAs have been demonstrated to be deregulated in different types of cancer. miR-21 is a key player in the majority of cancers. Down-regulation of miR-21 in glioblastoma cells leads to repression of cell growth, increased cellular apoptosis and cell-cycle arrest, which can theoretically enhance the chemotherapeutic effect in cancer therapy. In this study, the poly(amidoamine) (PAMAM) dendrimer was employed as a carrier to co-deliver antisense-miR-21 oligonucleotide (as-miR-21) and 5-fluorouracil (5-FU) to achieve delivery of as-miR-21 to human glioblastoma cells and enhance the cytotoxicity of 5-FU antisense therapy. The inhibitory effect toward brain tumors was evaluated by MTT assay, and measurements of cell apoptosis and invasion using the human brain glioma cell line U251. PAMAM could be simultaneously loaded with 5-FU and as-miR-21, forming a complex smaller than 100 nm in diameter. Both the chemotherapeutant and as-miR-21 could be efficiently introduced into tumor cells. The co-delivery of as-miR-21 significantly improved the cytotoxicity of 5-FU and dramatically increased the apoptosis of U251 cells, while the migration ability of the tumor cells was decreased. These results suggest that our co-delivery system may have important clinical applications in the treatment of miR-21-overexpressing glioblastoma.
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Affiliation(s)
- Yu Ren
- School of Materials Science & Engineering, Tianjin University, Tianjin 300072, P.R. China
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Zhou X, Ren Y, Han L, Mei M, Xu P, Zhang CZ, Wang GX, Jia ZF, Pu PY, Kang CS. Role of the AKT pathway in microRNA expression of human U251 glioblastoma cells. Int J Oncol 2010; 36:665-72. [PMID: 20126987 DOI: 10.3892/ijo_00000542] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Activation of the AKT (serine-threonine kinase) pathway is a common feature in glioblastoma cells. Downstream factors of the AKT pathway are involved in cell proliferation, apoptosis, cellular migration and angiogenesis. Micro-RNAs (miRNAs) are highly conserved small non-coding RNAs that block targeted mRNA expression at the post-transcriptional level. The aim of this study was to investigate the role of the AKT pathway in regulating miRNA. The changes of miRNA expression profile in human glioblastome U251 cells after AKT small interfering RNA transfection were examined by a microarray, and confirmed by Northern blotting. Down-regulation of AKT expression by siRNA decreased the activity of AKT pathway in U251 cells. Interruption of AKT pathway suppressed the expression of NF-kappaB and c-Myc, furthermore, the expression of a set of miRNAs was also changed after AKT siRNA transfection. There are putative binding sites of NF-kappaB and c-Myc in the promoters of several up-regulated miRNAs, indicating these transcription factors may also be involved in the regulation of miRNA expression, thus affecting the activity of AKT pathway in tumorigenesis. We provide new components of the regulatory function of AKT pathway to better understand the regulatory network mediated by downstream transcription factors. The understanding of the regulatory function of AKT pathway is crucial in tailored therapy of gliomas.
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Affiliation(s)
- Xuan Zhou
- Laboratory of Neuro-oncology, Tianjin Neurological Institute, Tianjin 300052, P.R. China
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Song TT, Yuan XB, Sun AP, Wang H, Kang CS, Ren Y, He B, Sheng J, Pu PY. Preparation of injectable paclitaxel sustained release microspheres by spray drying for inhibition of gliomain vitro. J Appl Polym Sci 2010. [DOI: 10.1002/app.31105] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ren Y, Zhou X, Mei M, Yuan XB, Han L, Wang GX, Jia ZF, Xu P, Pu PY, Kang CS. MicroRNA-21 inhibitor sensitizes human glioblastoma cells U251 (PTEN-mutant) and LN229 (PTEN-wild type) to taxol. BMC Cancer 2010; 10:27. [PMID: 20113523 PMCID: PMC2824710 DOI: 10.1186/1471-2407-10-27] [Citation(s) in RCA: 159] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2009] [Accepted: 01/31/2010] [Indexed: 01/04/2023] Open
Abstract
Background Substantial data indicate that the oncogene microRNA 21 (miR-21) is significantly elevated in glioblastoma multiforme (GBM) and regulates multiple genes associated with cancer cell proliferation, apoptosis, and invasiveness. Thus, miR-21 can theoretically become a target to enhance the chemotherapeutic effect in cancer therapy. So far, the effect of downregulating miR-21 to enhance the chemotherapeutic effect to taxol has not been studied in human GBM. Methods Human glioblastoma U251 (PTEN-mutant) and LN229 (PTEN wild-type) cells were treated with taxol and the miR-21 inhibitor (in a poly (amidoamine) (PAMAM) dendrimer), alone or in combination. The 50% inhibitory concentration and cell viability were determined by the MTT assay. The mechanism between the miR-21 inhibitor and the anticancer drug taxol was analyzed using the Zheng-Jun Jin method. Annexin V/PI staining was performed, and apoptosis and the cell cycle were evaluated by flow cytometry analysis. Expression of miR-21 was investigated by RT-PCR, and western blotting was performed to evaluate malignancy related protein alteration. Results IC(50) values were dramatically decreased in cells treated with miR-21 inhibitor combine with taxol, to a greater extent than those treated with taxol alone. Furthermore, the miR-21 inhibitor significantly enhanced apoptosis in both U251 cells and LN229 cells, and cell invasiveness was obviously weakened. Interestingly, the above data suggested that in both the PTEN mutant and the wild-type GBM cells, miR-21 blockage increased the chemosensitivity to taxol. It is worth noting that the miR-21 inhibitor additively interacted with taxol on U251cells and synergistically on LN229 cells. Thus, the miR-21 inhibitor might interrupt the activity of EGFR pathways, independently of PTEN status. Meanwhile, the expression of STAT3 and p-STAT3 decreased to relatively low levels after miR-21 inhibitor and taxol treatment. The data strongly suggested that a regulatory loop between miR-21 and STAT3 might provide an insight into the mechanism of modulating EGFR/STAT3 signaling. Conclusions Taken together, the miR-21 inhibitor could enhance the chemo-sensitivity of human glioblastoma cells to taxol. A combination of miR-21 inhibitor and taxol could be an effective therapeutic strategy for controlling the growth of GBM by inhibiting STAT3 expression and phosphorylation.
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Affiliation(s)
- Yu Ren
- Laboratory of Neuro-oncology, Tianjin Neurological Institute, Tianjin, PR China
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40
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Mei M, Ren Y, Zhou X, Yuan XB, Li F, Jiang LH, Kang CS, Yao Z. Suppression of breast cancer cellsin vitroby polyamidoamine-dendrimer-mediated 5-fluorouracil chemotherapy combined with antisense micro-RNA 21 gene therapy. J Appl Polym Sci 2009. [DOI: 10.1002/app.30868] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Qian CF, Yan W, Zhang JX, Shi L, Qian J, Fu Z, Kang CS, Liu N, You YP. Notch1 induces enhanced expression of Delta-like-1 in the U251MG glioma cell line. Int J Mol Med 2009; 24:445-51. [PMID: 19724883 DOI: 10.3892/ijmm_00000251] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The Notch signaling pathway takes part in coordinated regulation of cell growth, survival and differentiation. Previous findings have shown that Notch1 and Delta-like-1 (DLL1) are overexpressed in many glioma cell lines and primary human gliomas. Down-regulation of DLL1 by RNA interference inhibits proliferation and induces apoptosis in multiple glioma cell lines. Our studies showed that Notch1 expression plasmid induced more expression of DLL1 in the U251MG glioma cell line. Adversely, blocking Notch1 receptors down-regulated the expression of DLL1. Both down-regulating DLL1 and blocking Notch1 receptors induced U251MG cell apoptosis and proliferation inhibition, and combining the two treatments produced stronger effects than the sum of a single treatment. These findings suggest a positive feedback loop between Notch1 and DLL1, which may become an effective combined therapeutic target.
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Affiliation(s)
- Chun-Fa Qian
- Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, PR China
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Zhang J, Zhang QY, Fu YC, Wang T, Zhang J, Xu P, Zhou X, Pu PY, Kang CS. Expression of p-Akt and COX-2 in Gastric Adenocarcinomas and Adenovirus Mediated Akt1 and COX-2 ShRNA Suppresses SGC-7901 Gastric Adenocarcinoma and U251 Glioma Cell Growth In Vitro and In Vivo. Technol Cancer Res Treat 2009; 8:467-78. [PMID: 19925030 DOI: 10.1177/153303460900800608] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Cyclooxygenase-2 (COX-2) and Protein kinase B (PKB/Akt) play a crucial role in the formation of many malignant tumors and have been shown to be the important therapeutic targets. In the present study, we examined immunohistochemical expression of phosphorylated Akt (p-Akt) and COX-2 in 45 gastric adenocarcinomas with different tumor grades. Then, adenovirus-mediated small hairpin RNA (shRNA) expression vectors rAd5-Akt1+COX-2 (rAd5-A+C) that target sequences of human COX-2 and Akt1 were used to examine the inhibitory effects on cell proliferation, invasion and apoptosis in SGC7901 gastric adenocarcinoma and U251 glioma cells. Cell growth was inhibited by over 70%, as indicated by a MTT assay, and was accompanied by G1/G0 phase arrest in the rAd5-A+C treated group, indicating poor cell growth activities. The number of cells invading through the matrigel in the rAd5-A+C treated group was significantly decreased (36.2±3.1) compared with that of the control group SGC7901 (105.0±4.0) and the nonsense sequence group rAd5-HK (102.5±6.4). In addition, the tumor volumes in the SGC7901 subcutaneous nude mouse model treated with rAd5-A+C was significantly smaller than those of the control group and nonsense sequence group rAd5-HK. When COX-2 and Akt1 were dramatically downregulated, Ki-67, CyclinD1, MMP-2, MMP-9 and Bcl-2 were also downregulated. Our results demonstrated that p-Akt and COX-2 were overexpressed in gastric adenocarcinomas and their expression levels were elevated with the ascending order of tumor malignancy; rAd5-A+C targeting COX-2 and Akt1 down-regulated their expression significantly in a sequence-specific manner, exerting inhibitory effects on SGC7901 and U251 cell proliferation, invasion and apoptosis. In conclusion, our data suggest a novel mechanism for the regulation of malignant tumor cell growth and provide evidence for combined gene therapy for malignant tumors.
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Affiliation(s)
- Jing Zhang
- Gastroenterology, Tianjin Medical University General Hospital, 154 An-Shan Road, Heping District, Tianjin 300052, People's Republic of China
| | - Qing-Yu Zhang
- Gastroenterology, Tianjin Medical University General Hospital, 154 An-Shan Road, Heping District, Tianjin 300052, People's Republic of China
| | - Yan-Chao Fu
- Gastroenterology, Tianjin Medical University General Hospital, 154 An-Shan Road, Heping District, Tianjin 300052, People's Republic of China
| | - Tao Wang
- Gastroenterology, Tianjin Medical University General Hospital, 154 An-Shan Road, Heping District, Tianjin 300052, People's Republic of China
| | - Jie Zhang
- Gastroenterology, Tianjin Medical University General Hospital, 154 An-Shan Road, Heping District, Tianjin 300052, People's Republic of China
| | - Peng Xu
- Neurosurgery, Tianjin Medical University General Hospital and Laboratory of Neuro-Oncology, Tianjin Neurological Institute, 154 An-Shan Road, Heping District, Tianjin 300052, People's Republic of China
| | - Xuan Zhou
- Neurosurgery, Tianjin Medical University General Hospital and Laboratory of Neuro-Oncology, Tianjin Neurological Institute, 154 An-Shan Road, Heping District, Tianjin 300052, People's Republic of China
| | - Pei-yu Pu
- Neurosurgery, Tianjin Medical University General Hospital and Laboratory of Neuro-Oncology, Tianjin Neurological Institute, 154 An-Shan Road, Heping District, Tianjin 300052, People's Republic of China
| | - Chun-Sheng Kang
- Neurosurgery, Tianjin Medical University General Hospital and Laboratory of Neuro-Oncology, Tianjin Neurological Institute, 154 An-Shan Road, Heping District, Tianjin 300052, People's Republic of China
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Cui XW, Zhao FJ, Liu J, Song XM, Xu P, Zhou X, Zhang J, Wang T, Kang CS, Zhang QY. Suppression of Akt1 expression by small interference RNA inhibits SGC7901 cell growth in vitro and in vivo. Oncol Rep 2009; 22:1305-13. [PMID: 19885581 DOI: 10.3892/or_00000569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The Akt/PKB kinase family, including Akt1, 2 and 3, plays critical roles in regulating cell growth, proliferation, survival, metabolic and many other cellular activities. Recent evidence indicates that PKB/Akt is frequently constitutively active in many types of human cancer including gastric cancer. In the present study, we applied immunohistochemistry to tissue microarray to detect the expression of Akt1, followed by Akt1 small interference RNA (siRNA) to examine knock down of the Akt1 gene on the growth inhibition of human gastric cancer SGC7901 cells. Our results indicate that the expression of Akt1 was significantly increased in gastric cancer compared to normal gastric tissue and adjacent non-cancer tissue. The in vitro study shows that cell growth was significantly inhibited and G0/G1 arrest was observed in siRNA-Akt1-treated group. In vivo, the size of tumors was significantly smaller in SGC7901 subcutaneous mice model treated with siRNA-Akt1 than those treated with siRNA-nonsense and PBS. Our studies demonstrated siRNA-Akt1 can inhibit Akt1 expression, exerted growth inhibition effect on SGC7901 cells in vitro and in vivo. Suppression of Akt1 expression by siRNA could be a new strategy in gastric cancer treatment.
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Affiliation(s)
- Xiao-Wei Cui
- Department of Gastroenteropathy, Tianjin Medical University General Hospital, Tianjin, PR China
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Zhang J, Fu YC, Kang CS, Zhang QY, Wang T, Zhang J. [Inhibitory effect of adenovirus-mediated short hairpin RNA targeting P85 and Akt1 on growth of human gastric adenocarcinoma cell]. Zhonghua Nei Ke Za Zhi 2009; 48:557-561. [PMID: 19957795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
OBJECTIVE To construct a short hairpin RNA(shRNA) adenovirus vector targeting P85 and protein kinase B1 (PKB1/Akt1) and study its effects on the growth of SGC-7901 human gastric adenocarcinoma cells. METHODS P85 and Akt1 shRNA expression frames were subcloned to pGSadeno adenovirus vector with homologous recombination technology to construct pGSadeno-P85 + Akt1 (rAd5-P + A) vector. After screening and amplification, the recombinant adenovirus vector was digested with PacI and transfected into SGC-7901 cells and then its titer and transfection efficiency were detected with fluorescent microscope. P85 and Akt1 mRNA protein expression was identified with real-time PCR and Western blot. The proliferative activity of tumor cells was evaluated with MTT assay and flow cytometry in vitro. rAd5-HK and rAd5-P + A mediated by adenovirus were injected into the established subcutaneous SGC-7901 gastric adenocarcinoma in nude mice. During the observation period of 21 days, tumor volume was measured every 3 days to further testify the anti-tumor effect of rAd5-P + A on the SGC-7901 gastric adenocarcinoma cells and cell in situ apoptosis was detected with TUNEL assay. RESULTS The adenovirus vector rAd5-P + A was successfully constructed and it dramatically downregulated P85 and Akt1 mRNA expression in SGC-7901 gastric adenocarcinoma cells. Compared with a control group of SGC-7901 cells and cells transfected with general adenovirus rAd5-HK as control, P85 and Akt1 protein expression 48 h and 72 h after rAd5-P + A transfection was decreased by 57.5% and 63.7%, 67.8% and 75.6% with statistical significance (P = 0.005, P = 0.003). Cell proliferative activity in rAd5-P + A transfected cells was suppressed from the second day (P < 0.001) and the decreased P85 and Akt1 expression was accompanied by 5.9% -7.1% decrease of S phase fraction and 12.1% - 13.7% increase of G0/G1 phase. The tumor volume of rAd5-P + A treated group was smaller than that of the control and rAd5-HK group with statistical significance (F = 9.871, P = 0.025). Moreover, rAd5-P + A could induce cell in situ apoptosis. CONCLUSIONS Adenovirus-mediated targeting P85 and Akt1 shRNA can inhibit the growth of SGC-7901 human gastric adenocarcinoma cells and this may provide a new strategy of combination gene therapy in gastric adenocarcinoma.
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Affiliation(s)
- Jing Zhang
- Department of Gastroenterology, Tianjin Medical University General Hospital, Tianjin 300052, China
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45
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Lim J, Kim Y, Lee W, Kim M, Lee EJ, Kang CS, Han K. Fresh-frozen, optimal cutting temperature (OCT) compound-embedded bone marrow aspirates: a reliable resource for morphological, immunohistochemical and molecular examinations. Int J Lab Hematol 2009; 32:e34-9. [PMID: 19298222 DOI: 10.1111/j.1751-553x.2009.01139.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The usefulness of fresh-frozen, optimal cutting temperature (OCT) compound-embedded (FFOE) bone marrow (BM) aspirates was evaluated as a reliable resource for morphological, immunohistochemical and molecular examinations. One hundred BM aspirates were collected in polypropylene tubes and immediately frozen for 2 h in a deep freezer. Frozen BM was transferred to a cryomold filled with OCT compound and the prepared samples were stored in a deep freezer. Histological examination and immunohistochemical staining, polymerase chain reaction (PCR), sequencing and reverse transcription (RT)-PCR were performed to evaluate the quality of the FFOE BM sections in 10% of randomly selected samples. FFOE BM sections revealed better morphologies than paraffin-embedded clot sections in haematoxylin and eosin staining because mature erythrocytes were removed during the staining process in frozen BM sections. Immunohistochemical staining for CD34 revealed excellent staining quality and oil red O staining showed that fat vacuoles in cells were well preserved. The quality of genomic DNA in FFOE BM sections was suitable for obtaining about 2000 bp PCR product for the human leucocyte antigen-A locus followed by direct sequencing of the sample, and the quality of total RNA was suitable for detection of BCR-ABL fusion transcript. FFOE BM aspirates are a reliable resource for various laboratory tests of diagnostic and research arenas.
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Affiliation(s)
- J Lim
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
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46
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Zhao FJ, Kang CS, Cui XW, Song XM, Liu J, Zhang QY. [The relationship of MMP-9, VEGF and PCNA expressions and their clinical significance in gastric adenocarcinoma]. Zhonghua Nei Ke Za Zhi 2009; 48:114-117. [PMID: 19549464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
OBJECTIVE To investigate abnormal protein expression of matrix metalloproteinase-9 (MMP-9), vascular endothelial growth factor (VEGF) and proliferating cell nuclear antigen (PCNA) in human gastric adenocarcinoma, and further reveal the clinical significance. METHOD The MMP-9, VEGF and PCNA proteins expression was determined by immunohistochemistry staining in 45 gastric adenocarcinoma tissues, 45 adjacent specimens and 10 normal gastric mucosa tissues via tissue arrays accordingly. The relationship of these protein expression with differentiation degree, development and progression of gastric adenocarcinoma were also analyzed. RESULTS Positive rates of MMP-9, VEGF and PCNA in gastric adenocarcinoma, adjacent specimens and gastric normal mucosa were as follows: MMP-9, 82.2% (37/45), 64.4% (29/45), 30.0% (3/10) (P = 0.019); VEGF, 73.3% (33/45), 62.2% (28/45), 30.0% (3/10) (P = 0.029); PCNA, 84.4% (38/45), 71.1% (32/45), 10.0% (1/10), there were statistically significant difference (P = 0.001). The positive rates of MMP-9, VEGF and PCNA in well-differentiated adenocarcinoma, moderately differentiated adenocarcinoma and poorly differentiated adenocarcinoma were as follows: MMP-9, 70.0% (7/10), 80.0% (8/10), 88.0% (22/25), there were statistically significant difference (P = 0.015); VEGF, 50.0% (5/10), 60.0% (6/10), 88.0% (22/25), there were statistically significant difference (P = 0.000); PCNA, 60.0% (6/10), 90.0% (9/10), 92.0% (23/25), the difference is significant statistically (P = 0.004). The expression of MMP-9, VEGF and PCNA showed positive relationship with each other by rank correlation analysis (P < 0.05). CONCLUSION Tissue arrays technology is effective tool to analyze the expression of cancer related proteins in gastric adenocarcinoma. The expression of MMP-9, VEGF and PCNA proteins participates in the tumorigenesis and development process of gastric adenocarcinoma, and these can be used as indexes to evaluate prognosis in clinical.
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Affiliation(s)
- Feng-Juan Zhao
- Department of Scientific Research, General Hospital, Tianjin Medical University, Tianjin 300070, China
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Kang C, Yuan X, Zhong Y, Pu P, Guo Y, Albadany A, Yu S, Zhang Z, Li Y, Chang J, Sheng J. Growth Inhibition against Intracranial C6 Glioma Cells by Stereotactic Delivery of BCNU by Controlled Release from poly(D,L-lactic acid) Nanoparticles. Technol Cancer Res Treat 2009; 8:61-70. [PMID: 19166243 DOI: 10.1177/153303460900800108] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Transferrin (Tf), an iron-transporting serum glycoprotein, which binds to receptors expressed at the surface of most proliferating cells with particularly high expression on erythroblasts and cancer cells, was chosen as the ligand to develop BCNU-loaded biodegradable poly(D,L-lactic acid) nanoparticles (NPs) containing a ligand, which specifically binds to glioma cells, and their anti-tumor ability was evaluated using a C6 glioma model. In vitro drug release behavior demonstrated that BCNU-loaded PLA NPs show certain sustained release characteristics. NPs with low molecular weight PLA showed a higher burst effect and a significantly faster drug release from PLA samples. The biodistribution of Tf-coated nanoparticles investigated by 99Tc-labeled SPECT showed that the surface-containing transferrin PLA nanoparticles were concentrated in the brain and no radioactive foci could be found outside the brain. Inhibition of tumor growth in the C6 tumor-bearing animal model showed that BCNU-loaded PLA NPs had stronger cytotoxicity and prolonged the average survival time of rats. Especially when treated at an early stage with a higher dosage of NPs, the average survival time of rats was prolonged 88.37%. Furthermore, one rat maintained normal behavior continuously for an observation period of up to 60 days.
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Affiliation(s)
- ChunSheng Kang
- School of Materials Science and Engineering Tianjin University Tianjin 300072, China P.R
- Department of Neurosurgery Tianjin Medical University General Hospital Tianjin 300052, China P.R
- Authors contribute equally to the present work
| | - XuBo Yuan
- School of Materials Science and Engineering Tianjin University Tianjin 300072, China P.R
- Authors contribute equally to the present work
| | - Yue Zhong
- Department of Neurosurgery Tianjin Medical University General Hospital Tianjin 300052, China P.R
| | - PeiYu Pu
- Department of Neurosurgery Tianjin Medical University General Hospital Tianjin 300052, China P.R
| | - YanShuang Guo
- School of Materials Science and Engineering Tianjin University Tianjin 300072, China P.R
| | - Ammar Albadany
- Department of Neurosurgery Tianjin Medical University General Hospital Tianjin 300052, China P.R
| | - ShiZhu Yu
- Department of Neurosurgery Tianjin Medical University General Hospital Tianjin 300052, China P.R
| | - ZhiYong Zhang
- Department of Neurosurgery Tianjin Medical University General Hospital Tianjin 300052, China P.R
| | - YanHe Li
- Department of Neurosurgery Tianjin Medical University General Hospital Tianjin 300052, China P.R
| | - Jin Chang
- School of Materials Science and Engineering Tianjin University Tianjin 300072, China P.R
| | - Jing Sheng
- School of Materials Science and Engineering Tianjin University Tianjin 300072, China P.R
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48
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Jang M, Kim HK, Choi CW, Kang CS. Thyroid dose estimation with potassium iodide (KI) administration in a nuclear emergency. Radiat Prot Dosimetry 2008; 132:303-307. [PMID: 19054795 DOI: 10.1093/rpd/ncn299] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In a breach-of-containment nuclear reactor accident, the near-field exposure is primarily through inhalation of radioiodine. Thyroid blockade by oral potassium iodide (KI) is a practical and effective protective measure for the general public in such an emergency. The retention functions incorporating the thyroid blocking effects by KI have been derived using a standard three-compartment model of iodine metabolism. This allows more accurate estimation of the thyroid dose by calculating the blocking factor.
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Affiliation(s)
- M Jang
- National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Science, Seoul, South Korea.
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Xu P, Pu PY, Kang CS, Jia ZF, Zhou X, Wang GX. [Differential expression of Notch1 and Notch2 in astrocytoma and medulloblastoma]. Zhonghua Bing Li Xue Za Zhi 2008; 37:450-453. [PMID: 19035115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
OBJECTIVE To detect the differential expression of Notch1 and Notch2 in human astrocytoma and medulloblastoma; and to study the role of Notch1 and Notch2 in the development of both tumors. METHODS Immunohistochemical staining (SP method) and Western blot analysis were used to detect Notch1 and Notch2 expression in tissue arrays and freshly resected samples of normal brain tissue, astrocytoma and medulloblastoma. RESULTS Notch1 and Notch2 were negative in normal human brain tissue. Notch1 was highly expressed (total positive rate 80.0%, 48/60) while Notch2 was not detected in grade IV astrocytomas and sporadically observed in lower grade astrocytomas (total positive rate 10.0%, 6/60). The percentage of positive tumor cells and expression level of Notch1 increased with higher histologic grade (r = 0.859, P < 0.05). On the other hand, overexpression of Notch2 was detected in medulloblastoma (9/10) in contrast with lower expression of Notch1 (2/10). CONCLUSIONS Notch1 and Notch2 show differential expression in astrocytoma and medulloblastoma. This may be related to their different functional activities during the process of brain development.
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Affiliation(s)
- Peng Xu
- Department of Neurosurgery, Tianjin Medical University General Hospital and Laboratory of Neuro-oncology, Tianjin Neurological Institute, Tianjin 300052, China
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Jang M, Kim HK, Choi CW, Kang CS. Age-dependent potassium iodide effect on the thyroid irradiation by 131I and 133I in the nuclear emergency. Radiat Prot Dosimetry 2008; 130:499-502. [PMID: 18337292 DOI: 10.1093/rpd/ncn068] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The initial near-field exposure is primarily through inhalation in a nuclear emergency and the dominant contribution to the effective inhalation dose comes from radioiodine. Thyroid blockade by oral potassium iodide (KI) is efficient and practical for public in the nuclear emergency. Age-dependent radioprotective effect of KI on the thyroid irradiation by (131)I and (133)I has been derived using the simplified compartment model of iodine metabolism and WinSAAM program. Administration of KI within 2 h after (131)I and (133)I intake can block thyroid uptake significantly, yielding protective effect of 78.9% and 74.3%, respectively, for (131)I and (133)I for adults. The mean absorbed doses decrease with age, while protective effects of KI are similar for all age groups.
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Affiliation(s)
- M Jang
- National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Science, Seoul, Korea.
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