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Gao X, Zhang R, He Y, Wang X, Bao W, Feng X, Chai J, Wang J. EphB3 protein is a potential ancillary diagnostic biomarker for thyroid cancers. Ann Diagn Pathol 2024; 69:152262. [PMID: 38150866 DOI: 10.1016/j.anndiagpath.2023.152262] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 12/21/2023] [Accepted: 12/21/2023] [Indexed: 12/29/2023]
Abstract
OBJECTIVE To investigate the expression of ephrin type B receptor 3 (EphB3) in thyroid tumors and its usage as an ancillary diagnostic biomarker for thyroid tumors. METHODS Formalin-fixed and paraffin-embedded (FFPE) tissue samples (78 cases) and FNAC samples (57 cases) were assessed with the EphB3 antibody using immunohistochemistry. PTC and other thyroid follicular tumors were compared regarding their EphB3 expression. Sanger sequencing was used to assess for the presence of a BRAF V600E mutation. RESULTS EphB3 was positive in 81.8 % (27/33) of papillary thyroid carcinoma (PTC), 83.3 % (5/6) of medullary thyroid carcinoma (MTC), 25 % (1/4) of hyperplastic/adenomatoid nodule (HN), 14.3 % (1/7) of follicular adenoma (FA), and negative in follicular tumors of uncertain malignant potential (FT-UMP) (0/13), noninvasive follicular neoplasm with papillary-like nuclear features (NIFTP) (0/7), thyroid follicular carcinoma (TFC) (0/4), Hashimoto's thyroiditis (0/4), and normal thyroid follicular tissues (0/33). In cellular blocks, EphB3 was positive in 87.1 % (20/23) of PTC, 75 % (3/4) of MTC, 20 % (2/10) of HN, and negative in atypia of undetermined significance/follicular lesion of undetermined significance (AUS/FLUS) (0/20) and normal thyroid follicular cells (0/10). CONCLUSION EphB3 is expressed in the majority of PTC, but less so in benign follicular nodules. EphB3 expression in fine needle aspiration cytology (FNAC) specimens can be used as a diagnostic tool to differentiate thyroid cancer from other follicular lesions in its differential diagnosis, especially AUS/FLUS and PTC.
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Affiliation(s)
- Xinyue Gao
- Department of Pathology, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210002, China
| | - Rusong Zhang
- Department of Pathology, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210002, China
| | - Yan He
- Department of Pathology, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210002, China
| | - Xuan Wang
- Department of Pathology, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210002, China
| | - Wei Bao
- Department of Pathology, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210002, China
| | - Xiao Feng
- Department of Pathology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210029, China
| | - Jiaxin Chai
- Department of Pathology Eastern Theater Air Force Hospital, No. 1 Nanjing Ma Lu Jie, Nanjing 120002, China
| | - Jiandong Wang
- Department of Pathology, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210002, China.
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Huang H, Chen L, Yuan J, Zhang H, Yang J, Xu Z, Chen Y. Role and mechanism of EphB3 in epileptic seizures and epileptogenesis through Kalirin. Mol Cell Neurosci 2024; 128:103915. [PMID: 38143048 DOI: 10.1016/j.mcn.2023.103915] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 12/06/2023] [Accepted: 12/19/2023] [Indexed: 12/26/2023] Open
Abstract
BACKGROUND The EphB receptor tyrosine kinase family participates in intricate signaling pathways that orchestrate neural networks, guide neuronal axon development, and modulate synaptic plasticity through interactions with surface-bound ephrinB ligands. Additionally, Kalirin, a Rho guanine nucleotide exchange factor, is notably expressed in the postsynaptic membrane of excitatory neurons and plays a role in synaptic morphogenesis. This study postulates that Kalirin may act as a downstream effector of EphB3 in epilepsy. This investigation focuses on understanding the link between EphB3 and epilepsy. MATERIALS AND METHODS Chronic seizure models using LiCl-pilocarpine (LiCl/Pilo) and pentylenetetrazol were developed in rats. Neuronal excitability was gauged through whole-cell patch clamp recordings on rat hippocampal slices. Real-time PCR determined Kalirin's mRNA expression, and Western blotting was employed to quantify EphB3 and Kalirin protein levels. Moreover, dendritic spine density in epileptic rats was evaluated using Golgi staining. RESULTS Modulation of EphB3 functionality influenced acute seizure severity, latency duration, and frequency of spontaneous recurrent seizures. Golgi staining disclosed an EphB3-driven alteration in dendritic spine density within the hippocampus of epileptic rats, underscoring its pivotal role in the reconfiguration of hippocampal neural circuits. Furthermore, our data propose Kalirin as a prospective downstream mediator of the EphB3 receptor. CONCLUSIONS Our findings elucidate that EphB3 impacts the action potential dynamics in isolated rat hippocampal slices and alters dendritic spine density in the inner molecular layer of epileptic rat hippocampi, likely through Kalirin-mediated pathways. This hints at EphB3's significant role in shaping excitatory circuit loops and recurrent seizure activity via Kalirin.
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Affiliation(s)
- Hao Huang
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, No.74, Linjiang Road, Chongqing 400010, China; Department of Neurology, The Affiliated Hospital of Zunyi Medical University, No.149 Dalian Road, Zunyi 563003, Guizhou Province, China
| | - Ling Chen
- Department of Neurology, The Affiliated Hospital of Zunyi Medical University, No.149 Dalian Road, Zunyi 563003, Guizhou Province, China
| | - Jinxian Yuan
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, No.74, Linjiang Road, Chongqing 400010, China
| | - Haiqing Zhang
- Department of Neurology, The Affiliated Hospital of Zunyi Medical University, No.149 Dalian Road, Zunyi 563003, Guizhou Province, China
| | - Juan Yang
- Department of Neurology, The Affiliated Hospital of Zunyi Medical University, No.149 Dalian Road, Zunyi 563003, Guizhou Province, China
| | - Zucai Xu
- Department of Neurology, The Affiliated Hospital of Zunyi Medical University, No.149 Dalian Road, Zunyi 563003, Guizhou Province, China.
| | - Yangmei Chen
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, No.74, Linjiang Road, Chongqing 400010, China.
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Lee K, Nada H, Byun HJ, Lee CH, Elkamhawy A. Hit Identification of a Novel Quinazoline Sulfonamide as a Promising EphB3 Inhibitor: Design, Virtual Combinatorial Library, Synthesis, Biological Evaluation, and Docking Simulation Studies. Pharmaceuticals (Basel) 2021; 14:1247. [PMID: 34959648 DOI: 10.3390/ph14121247] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 11/23/2021] [Accepted: 11/25/2021] [Indexed: 11/17/2022] Open
Abstract
EphB3 is a major key player in a variety of cellular activities, including cell migration, proliferation, and apoptosis. However, the exact role of EphB3 in cancer remains ambiguous. Accordingly, new EphB3 inhibitors can increase the understanding of the exact roles of the receptor and may act as promising therapeutic candidates. Herein, a hybrid approach of structure-based design and virtual combinatorial library generated 34 quinazoline sulfonamides as potential selective EphB3 inhibitors. A molecular docking study over EphB3 predicted the binding affinities of the generated library, and the top seven hit compounds (3a and 4a–f), with GlideScore ≥ −6.20 Kcal/mol, were chosen for further MM-GBSA calculations. Out of the seven top hits, compound 4c showed the highest MM-GBSA binding free energy (−74.13 Kcal/mol). To validate these predicted results, compounds 3a and 4a–f were synthesized and characterized using NMR, HRMS, and HPLC. The biological evaluation revealed compound 4c as a potent EphB3 inhibitory lead (IC50 = 1.04 µM). The screening of 4c over a mini-panel of kinases consisting of EGFR, Aurora A, Aurora B, CDK2/cyclin A, EphB1, EphB2, EphB4, ERBB2/HER2, and KDR/VEGFR2, showed a promising selective profile against EphB3 isoform. A dose-dependent assay of compound 4c and a molecular docking study over the different forms of EphB provided insights into the elicited biological activities and highlighted reasonable explanations of the selectivity.
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Lee TH, Heo JH, Jeong JY, Lee GH, Park DS, Kim TH. Low Expression of EphB2, EphB3, and EphB4 in Bladder Cancer: Novel Potential Indicators of Muscular Invasion. Yonsei Med J 2021; 62:679-690. [PMID: 34296545 PMCID: PMC8298868 DOI: 10.3349/ymj.2021.62.8.679] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 05/12/2021] [Accepted: 06/03/2021] [Indexed: 11/27/2022] Open
Abstract
PURPOSE Eph receptors are differentially expressed in numerous malignant tumors. This study intended to analyze the roles of EphB receptors (EphB2, B3, and B4) in urinary bladder cancer. MATERIALS AND METHODS Tissue microarray-based immunohistochemical analysis was used to investigate the expression patterns of EphB2, EphB3, and EphB4 in 154 bladder cancer specimens. Immunohistochemical staining was conducted examining the extent of stained cells and staining intensity. EphB was considered to be highly expressed when the intensity of staining was more than moderate in >25% of cells in the tissue section. Small interfering RNA (siRNA) was used to knock down EphB expression in bladder cancer cell lines (T24, 5637) to determine the effects of EphB on tumor cell invasion, proliferation, and migration. RESULTS EphB receptors (B2, B3, and B4) were detected in 40.9% (EphB2, 63/154), 71.4% (EphB3, 110/154), and 53.2% (EphB4, 82/154) of bladder cancer specimens. Low expression of EphB2, B3, and B4 receptors were significantly associated with higher tumor grade (EphB2, p<0.001; EphB3, p=0.032; EphB4, p<0.001) and muscular invasion (EphB2, p=0.002; EphB3, p=0.009; EphB4, p<0.001). No obvious correlation was observed with other clinicopathological variables, such as age, sex, recurrence, lymph node involvement, metastasis, and overall survival. Inactivation of EphB receptors by siRNA transfection increased cell viability, tumor cell invasion, proliferation, and migration in comparison with untransfected cancer cells. CONCLUSION Low expression of EphB receptors (B2, B3, and B4) can be a predictive marker for muscular invasion of bladder cancer.
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Affiliation(s)
- Tae Ho Lee
- Department of Urology, CHA Bundang Medical Center, CHA University, Seongnam, Korea
| | - Jin Hyung Heo
- Department of Pathology, CHA Bundang Medical Center, CHA University, Seongnam, Korea
| | - Ju Yeon Jeong
- Clinical Research Institute, CHA Bundang Medical Center, CHA University, Seongnam, Korea
| | - Gee Hoon Lee
- Department of Pathology, CHA Bundang Medical Center, CHA University, Seongnam, Korea
| | - Dong Soo Park
- Department of Urology, CHA Bundang Medical Center, CHA University, Seongnam, Korea
| | - Tae Hoen Kim
- Department of Pathology, CHA Bundang Medical Center, CHA University, Seongnam, Korea
- Clinical Research Institute, CHA Bundang Medical Center, CHA University, Seongnam, Korea.
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Tsenkina Y, Tapanes SA, Díaz MM, Titus DJ, Gajavelli S, Bullock R, Atkins CM, Liebl DJ. EphB3 interacts with initiator caspases and FHL-2 to activate dependence receptor cell death in oligodendrocytes after brain injury. Brain Commun 2020; 2:fcaa175. [PMID: 33305261 PMCID: PMC7713998 DOI: 10.1093/braincomms/fcaa175] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 02/04/2020] [Revised: 09/09/2020] [Accepted: 09/17/2020] [Indexed: 11/16/2022] Open
Abstract
Clinical trials examining neuroprotective strategies after brain injury, including those targeting cell death mechanisms, have been underwhelming. This may be in part due to an incomplete understanding of the signalling mechanisms that induce cell death after traumatic brain injury. The recent identification of a new family of death receptors that initiate pro-cell death signals in the absence of their ligand, called dependence receptors, provides new insight into the factors that contribute to brain injury. Here, we show that blocking the dependence receptor signalling of EphB3 improves oligodendrocyte cell survival in a murine controlled cortical impact injury model, which leads to improved myelin sparing, axonal conductance and behavioural recovery. EphB3 also functions as a cysteine-aspartic protease substrate, where the recruitment of injury-dependent adaptor protein Dral/FHL-2 together with capsase-8 or -9 leads to EphB3 cleavage to initiate cell death signals in murine and human traumatic brain-injured patients, supporting a conserved mechanism of cell death. These pro-apoptotic responses can be blocked via exogenous ephrinB3 ligand administration leading to improved oligodendrocyte survival. In short, our findings identify a novel mechanism of oligodendrocyte cell death in the traumatically injured brain that may reflect an important neuroprotective strategy in patients.
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Affiliation(s)
- Yanina Tsenkina
- The Miami Project to Cure Paralysis, Department of Neurosurgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Stephen A Tapanes
- The Miami Project to Cure Paralysis, Department of Neurosurgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Madelen M Díaz
- The Miami Project to Cure Paralysis, Department of Neurosurgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - David J Titus
- The Miami Project to Cure Paralysis, Department of Neurosurgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Shyam Gajavelli
- The Miami Project to Cure Paralysis, Department of Neurosurgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Ross Bullock
- The Miami Project to Cure Paralysis, Department of Neurosurgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Coleen M Atkins
- The Miami Project to Cure Paralysis, Department of Neurosurgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Daniel J Liebl
- The Miami Project to Cure Paralysis, Department of Neurosurgery, University of Miami Miller School of Medicine, Miami, FL, USA
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Sun P, Sun L, Cui J, Liu L, He Q. Long noncoding RNA HAS2-AS1 accelerates non-small cell lung cancer chemotherapy resistance by targeting LSD1/ EphB3 pathway. Am J Transl Res 2020; 12:950-958. [PMID: 32269726 PMCID: PMC7137060] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Accepted: 01/02/2020] [Indexed: 06/11/2023]
Abstract
The essential roles of long noncoding RNA (lncRNA) have been identified by emerging literature in the non-small cell lung cancer (NSCLC). However, the role of lncRNA hyaluronan synthase 2 antisense 1 (HAS2-AS1) in the NSCLC tumorigenesis is not clear. Here, we investigate the role and mechanism of HAS2-AS1 in the NSCLC tumorigenesis. In the NSCLC tissue and cells, HAS2-AS1 was found to be up-regulated, which, in turn, indicated the poor prognosis of NSCLC patients. Functional experiments illustrated that HAS2-AS1 promoted the proliferation, invasion and gefitinib chemotherapy resistance of NSCLC cells. In vivo, HAS2-AS1 knockdown suppressed the tumor growth. Mechanically, HAS2-AS1 recruited the lysine-specific demethylase 1 (LSD1) to the EphB3 promoter region to inhibit its transcription. In conclusion, this finding elucidates the essential roles of HAS2-AS1 in the NSCLC tumorigenesis, providing a possible treatment strategy for the NSCLC.
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Affiliation(s)
- Peng Sun
- Department of Oncology, The Second Hospital of Dalian Medical University Dalian, China
| | - Limin Sun
- Department of Oncology, The Second Hospital of Dalian Medical University Dalian, China
| | - Jia Cui
- Department of Oncology, The Second Hospital of Dalian Medical University Dalian, China
| | - Lili Liu
- Department of Oncology, The Second Hospital of Dalian Medical University Dalian, China
| | - Qing He
- Department of Oncology, The Second Hospital of Dalian Medical University Dalian, China
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Wu Z, Liu R, Xiong L, Miao X, Li D, Zou Q, Yuan Y, Yang Z. Prognostic and Clinicopathological Significance of EphB3 and Dysadherin Expression in Extrahepatic Cholangiocarcinoma. Cancer Manag Res 2020; 12:221-232. [PMID: 32021438 PMCID: PMC6959498 DOI: 10.2147/cmar.s232278] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 09/24/2019] [Accepted: 12/30/2019] [Indexed: 12/14/2022] Open
Abstract
Aim EphB3 and dysadherin are involved in tumorigenesis and progression of many neoplasms. However, the roles of EphB3 and dysadherin in extrahepatic cholangiocarcinoma (ECC) remain to be revealed. In this study, we aimed to evaluate the expression of EphB3 and dysadherin, and investigate their clinicopathological significance in ECC. Methods We examined EphB3 and dysadherin expression in 100 ECC, 30 peritumoral tissues, 10 adenoma and 15 normal biliary tract tissues using EnVision immunohistochemistry. The relationship between EphB3 or dysadherin expression and clinicopathological features was evaluated using the χ2 test or Fisher’s exact test. The overall survival of ECC patients was analyzed using Kaplan-Meier univariate survival analysis and Log rank tests. Results We found that EphB3 expression was significantly down-regulated and dysadherin expression was significantly up-regulated in ECC tissues compared with normal tissues (P < 0.01). EphB3 expression was negatively correlated with dysadherin expression in ECC (P < 0.01). The positive rate of EphB3 expression and negative rate of dysadherin expression was significantly higher in patients with well-differentiated type, no lymph node metastasis, no surrounding tissues and organs invasion, early TNM stages (I + II) and radical resection (P < 0.01). The survival of ECC patients with positive EphB3 or negative dysadherin expression was significantly longer than patients with negative EphB3 or positive dysadherin expression (P < 0.01). Cox multivariate analysis demonstrated that negative EphB3 or positive dysadherin expression were independent poor prognostic factors in ECC patients. The ROC curves suggested that EphB3 and dysadherin combined diagnostic efficacy (AUC=0.688, 95%CI: 0.603-0.772) was significantly higher EphB3 diagnostic efficacy (AUC=0.654, 95%CI: 0.564-0.743) or dysadherin diagnostic efficacy (AUC=0.648, 95%CI: 0.558-0.737) alone. Conclusion EphB3 and dysadherin are involved in the carcinogenesis and progression of ECC, and ECC patients with negative EphB3 or positive dysadherin expression have a poor prognosis.
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Affiliation(s)
- Zhengchun Wu
- Department of General Surgery, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, People's Republic of China
| | - Rushi Liu
- Laboratory of Medical Molecular and Immunological Diagnostics, School of Medicine, Hunan Normal University, Changsha, Hunan 410013, People's Republic of China
| | - Li Xiong
- Department of General Surgery, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, People's Republic of China
| | - Xiongying Miao
- Department of General Surgery, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, People's Republic of China
| | - Daiqiang Li
- Department of Pathology, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, People's Republic of China
| | - Qiong Zou
- Department of Pathology, Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, People's Republic of China
| | - Yuan Yuan
- Department of Pathology, Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, People's Republic of China
| | - Zhulin Yang
- Department of General Surgery, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, People's Republic of China
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Xuan Z, Huang J, Gao L, Wang Y, Wang J, Sun Y. Receptor Tyrosine Kinase EphB3: a Prognostic Indicator in Colorectal Carcinoma. Pathol Oncol Res 2018; 26:541-549. [PMID: 30535864 DOI: 10.1007/s12253-018-0562-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 06/13/2018] [Accepted: 11/20/2018] [Indexed: 02/07/2023]
Abstract
Although EphB3 expression is down-regulated in colorectal cancer (CRC) cells compared with normal intestinal epithelial cells, the relationship between EphB3 expression and clinicopathological parameters in CRC is unclear. We examined EphB3 expression in 128 CRC tissue specimens and in 19 adenoma specimens using immunohistochemistry. The relationships between EphB3 expression and clinicopathological parameters, KRAS mutations, BRAF V600E mutation, MSI and survival were evaluated using Spearman's rank correlation and Kaplan-Meier survival analyses, respectively. CpG methylation in the EphB3 promoter was examined in four human CRC cell lines and tissues. EphB3 was strongly expressed in all normal intestinal epithelial cells (128/128) and adenoma cells (19/19). In CRC tumor cells, EphB3 expression was negative or weak in 41.4% (53/128), moderate in 26.6% (34/128), and strong in 32.0% (41/128) of samples. EphB3 expression was negatively associated with invasive depth (P = 0.016, rs = -0.213), lymph node metastasis (P = 0.000, rs = -0.490), and TNM stage (P = 0.000, rs = -0.390), and was positively associated with poor differentiation (P = 0.001, rs = 0.290), BRAF V600E mutation (P = 0.008, rs = 0.235), and longer overall survival (P < 0.001). In multivariate analysis, EphB3 expression (P = 0.007) and lymph node metastasis (P < 0.001) were independent prognostic factors for poor survival. Hypermethylation of the EphB3 promoter was detected in cell lines and CRC tissues. EphB3 is down-regulated in CRC compared to normal mucosa. Hypermethylation of CpG island is contributed to downregulation of EphB3 in CRC. EphB3 expression in tumor cells may be a useful prognostic indicator for patients with CRC.
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Affiliation(s)
- Zhuoqi Xuan
- Department of Colorectal Surgery, the First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China.,Department of Gastrointestinal Surgery, the Jiangyin People's Hospital, Jinagsu, 214400, China
| | - Jianming Huang
- Department of Gastrointestinal Surgery, the Jiangyin People's Hospital, Jinagsu, 214400, China
| | - Lin Gao
- Department of Gastrointestinal Surgery, the Jiangyin People's Hospital, Jinagsu, 214400, China
| | - Yong Wang
- Department of Colorectal Surgery, the First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Jiandong Wang
- Department of Pathology, Jinling Hospital, Nanjing University School of Medicine, No.305, Zhong San Dong Lu, Nanjing, 210002, China.
| | - Yueming Sun
- Department of Colorectal Surgery, the First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China.
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Zhao K, He J, Wang YF, Jin SD, Fan Y, Fang N, Qian J, Xu TP, Guo RH. EZH2-mediated epigenetic suppression of EphB3 inhibits gastric cancer proliferation and metastasis by affecting E-cadherin and vimentin expression. Gene 2018; 686:118-124. [PMID: 30408551 DOI: 10.1016/j.gene.2018.11.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 10/29/2018] [Accepted: 11/04/2018] [Indexed: 12/16/2022]
Abstract
EphB3 is a member of the EPH family of receptors and has been found to play a role in the carcinogenesis of some human cancers. However, its expression and clinical significance in gastric cancer (GC) have not been well documented. In the present study, we detected the expression of EphB3 in GC and adjacent noncancerous tissues and explored its relationships with the clinicopathological features and prognosis of GC patients. It was found that EphB3 silenced GC cells epigenetically by direct transcriptional repression of GC cells via polycomb group protein EZH2 mediation. EphB3 was downregulated in GC cells and tissues, and EphB3 depletion promoted GC cell growth and invasion, while ectopic overexpression of EphB3 produced a significant anti-tumor effect. EphB3 was found to be involved in epithelial-mesenchymal transition by regulating E-cadherin and vimentin expression. In addition, patients with reduced EphB3 expression had shorter disease-free survival (DFS), indicating that EphB3 may prove to be a biomarker for prognosis of GC. These results demonstrated that EphB3 functioned as a tumor-suppressor and prognostic biomarker in GC.
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Affiliation(s)
- Kun Zhao
- Department of Oncology, the First Affiliated Hospital of Nanjing Medical University, No. 300 Guangzhou Road, Nanjing 210029, Jiangsu Province, People's Republic of China
| | - Jing He
- Department of Oncology, the First Affiliated Hospital of Nanjing Medical University, No. 300 Guangzhou Road, Nanjing 210029, Jiangsu Province, People's Republic of China
| | - Yan-Fen Wang
- Department of Pathology, The First People's Hospital of Yangzhou/The Second Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu Province, People's Republic of China
| | - Shi-Dai Jin
- Department of Oncology, the First Affiliated Hospital of Nanjing Medical University, No. 300 Guangzhou Road, Nanjing 210029, Jiangsu Province, People's Republic of China
| | - Yu Fan
- Cancer Institute, the Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu 212002, People's Republic of China
| | - Na Fang
- Cancer Institute, the Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu 212002, People's Republic of China
| | - Jun Qian
- Department of Oncology, the Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Suzhou Cancer Medical Center, Suzhou, Jiangsu 215001, People's Republic of China.
| | - Tong-Peng Xu
- Department of Oncology, the First Affiliated Hospital of Nanjing Medical University, No. 300 Guangzhou Road, Nanjing 210029, Jiangsu Province, People's Republic of China.
| | - Ren-Hua Guo
- Department of Oncology, the First Affiliated Hospital of Nanjing Medical University, No. 300 Guangzhou Road, Nanjing 210029, Jiangsu Province, People's Republic of China.
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Lee SY, Na YJ, Jeong YA, Kim JL, Oh SC, Lee DH. Upregulation of EphB3 in gastric cancer with acquired resistance to a FGFR inhibitor. Int J Biochem Cell Biol 2018; 102:128-137. [PMID: 30044964 DOI: 10.1016/j.biocel.2018.07.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 07/20/2018] [Accepted: 07/21/2018] [Indexed: 11/16/2022]
Abstract
Amplification of fibroblast growth factor receptor2 (FGFR2) has been regarded as a druggable target in gastric cancer (GC). Despite known potential of AZD4547, a selective inhibitor of FGFR 1-3, to suppress tumorigenic effects of activated FGFR2, resistance to the targeted agent has been an unresolved issue. This study was performed to elucidate the mechanism of AZD4547 resistance in GC cells. SNU-16 cells were used to establish an AZD4547-resistant GC cell line, SNU-16R. Elevated phosphorylation of EphB3 was confirmed using the Human Phospho-Receptor Tyrosine Kinase Array kit. A tyrosine kinase inhibitor (TKI) of EphB3 was used to investigate the effects of suppressed EphB3 activity in the SNU-16R cell line. SNU-16R cells exhibited upregulated phosphorylation of EphB3. Treatment of SNU-16R cells with the EphB3 TKI resulted in induction of apoptosis, decreased cellular viability, and cell cycle arrest at sub-G1 phase. SNU-16R cells expressed upregulated levels of N-cadherin, vimentin, Snail, matrix metalloproteinase 2 (MMP-2), and MMP-9, and reduced levels of E-cadherin, characteristic of epithelial to mesenchymal transition (EMT). Matrigel invasion assay also demonstrated the increased invasiveness of SNU-16R cells. EphB3 TKI treatment inhibited EMT of SNU-16R cells. Activation of mammalian target of rapamycin (mTOR) through the Ras-ERK1/2 pathway was suggested as the signal transduction mechanism downstream EphB3 by showing enhanced phosphorylation of Raf-1, MEK1/2, ERK1/2, mTOR and its downstream substrates in SNU-16R cells. As expected, EphB3 TKI decreased phosphorylation of these proteins. Our data suggest phosphorylation of mTOR through signaling by EphB3 is a potential mechanism of AZD4547 resistance in GC cells.
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Affiliation(s)
- Suk-Young Lee
- Division of Oncology/Hematology, Department of Internal Medicine, College of Medicine, Korea University, 148 Gurodong-ro, Guro-gu, Seoul 08308, Republic of Korea.
| | - Yoo Jin Na
- Division of Oncology/Hematology, Department of Internal Medicine, College of Medicine, Korea University, 148 Gurodong-ro, Guro-gu, Seoul 08308, Republic of Korea.
| | - Yoon A Jeong
- Division of Oncology/Hematology, Department of Internal Medicine, College of Medicine, Korea University, 148 Gurodong-ro, Guro-gu, Seoul 08308, Republic of Korea.
| | - Jung Lim Kim
- Division of Oncology/Hematology, Department of Internal Medicine, College of Medicine, Korea University, 148 Gurodong-ro, Guro-gu, Seoul 08308, Republic of Korea.
| | - Sang Cheul Oh
- Division of Oncology/Hematology, Department of Internal Medicine, College of Medicine, Korea University, 148 Gurodong-ro, Guro-gu, Seoul 08308, Republic of Korea.
| | - Dae-Hee Lee
- Division of Oncology/Hematology, Department of Internal Medicine, College of Medicine, Korea University, 148 Gurodong-ro, Guro-gu, Seoul 08308, Republic of Korea; Brain Korea 21 Program for Biomedicine Science, College of Medicine, Korea University, 148 Gurodong-ro, Guro-gu, Seoul 08308, Republic of Korea.
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11
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Yan HX, Li QL, Cai WW, Tang D, Wang B, Liu X, Liu ZD, Yang ZL. EphA10 and EphB3 are prognostic markers in gallbladder squamous cell/adenosquamous carcinomas and adenocarcinomas. Int J Clin Exp Pathol 2018; 11:512-525. [PMID: 31938137 PMCID: PMC6958000] [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] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Accepted: 11/13/2017] [Indexed: 06/10/2023]
Abstract
AIMS Squamous cell/adenosquamous carcinomas (SC/ASC) are rare subtypes of gallbladder cancers (GBCs). Clinical characteristics of SC/ASC have not been well documented, and no biological markers of GBC carcinogenesis, progression and prognosis are available. METHODS We detected EphA10 and EphB3 expression in 69 SC/ASCs and 146 adenocarcinomas (ACs) with EnVision immunohistochemistry. RESULTS The percentage of cases with a patient age of > 45 years, lymph node metastasis and invasion was significantly higher in the SCs/ASCs compared with the ACs (P < 0.05). The positive expression of EphA10 and negative expression of EphB3 were significantly higher in the cases of SC/ASC and AC than in chronic cholecystitis (P < 0.01). The positive expressions of EphA10 and negative expression of EphB3 were significantly higher in the cases of poorly differentiation, large tumor size, high TNM stage, lymph node metastasis, invasion and no resection (only biopsy) of SC/ASC and AC. The negative correlation was found between EphA10 and EphB3 expression in SC/ASC and AC (P < 0.01). The univariate Kaplan-Meier analysis showed that positive EphA10 and negative EphB3, differentiation, tumor size, TNM stage, lymph node metastasis, invasion and surgical curability, is closely associated with a decreased overall survival in SC/ASC and AC patients (P < 0.05 or P < 0.01). The multivariate Cox regression analysis identified that positive EphA10 and negative EphB3 expression are independent factors for a poor-prognosis in SC/ASC and AC patients. The AUC for EphA10 and EphB3 showed might have role for carcinogenesis and progression of SC/ASC and AC. CONCLUSIONS The present study indicates that positive EphA10 and negative EphB3 expression are closely associated with the pathogenesis, clinical, pathological and biological behaviors, and poor prognosis in gallbladder cancer.
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Affiliation(s)
- Hai-Xiong Yan
- Department of General Surgery, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Qing-Long Li
- Department of General Surgery, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Wen-Wu Cai
- Department of General Surgery, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Da Tang
- Department of General Surgery, The Third Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Biao Wang
- Department of General Surgery, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Xiang Liu
- Department of General Surgery, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Zhi-De Liu
- Department of General Surgery, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
| | - Zhu-Lin Yang
- Department of General Surgery, The Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China
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12
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Yoshida S, Kato T, Kanno N, Nishimura N, Nishihara H, Horiguchi K, Kato Y. Cell type-specific localization of Ephs pairing with ephrin-B2 in the rat postnatal pituitary gland. Cell Tissue Res 2017; 370:99-112. [PMID: 28660300 DOI: 10.1007/s00441-017-2646-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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: 10/03/2016] [Accepted: 05/06/2017] [Indexed: 01/20/2023]
Abstract
Sox2-expressing stem/progenitor cells in the anterior lobe of the pituitary gland form two types of micro-environments (niches): the marginal cell layer and dense cell clusters in the parenchyma. In relation to the mechanism of regulation of niches, juxtacrine signaling via ephrin and its receptor Eph is known to play important roles in various niches. The ephrin and Eph families are divided into two subclasses to create ephrin/Eph signaling in co-operation with confined partners. Recently, we reported that ephrin-B2 localizes specifically to both pituitary niches. However, the Ephs interacting with ephrin-B2 in these pituitary niches have not yet been identified. Therefore, the present study aims to identify the Ephs interacting with ephrin-B2 and the cells that produce them in the rat pituitary gland. In situ hybridization and immunohistochemistry demonstrated cell type-specific localization of candidate interacting partners for ephrin-B2, including EphA4 in cells located in the posterior lobe, EphB1 in gonadotropes, EphB2 in corticotropes, EphB3 in stem/progenitor cells and EphB4 in endothelial cells in the adult pituitary gland. In particular, double-immunohistochemistry showed cis-interactions between EphB3 and ephrin-B2 in the apical cell membranes of stem/progenitor cell niches throughout life and trans-interactions between EphB2 produced by corticotropes and ephrin-B2 located in the basolateral cell membranes of stem/progenitor cells in the early postnatal pituitary gland. These data indicate that ephrin-B2 plays a role in pituitary stem/progenitor cell niches by selective interaction with EphB3 in cis and EphB2 in trans.
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Affiliation(s)
- Saishu Yoshida
- Division of Life Science, Graduate School of Agriculture, Meiji University, Kanagawa, Japan.,Institute of Reproduction and Endocrinology, Meiji University, Kanagawa, Japan
| | - Takako Kato
- Institute of Reproduction and Endocrinology, Meiji University, Kanagawa, Japan
| | - Naoko Kanno
- Division of Life Science, Graduate School of Agriculture, Meiji University, Kanagawa, Japan
| | - Naoto Nishimura
- Division of Life Science, Graduate School of Agriculture, Meiji University, Kanagawa, Japan
| | - Hiroto Nishihara
- Division of Life Science, Graduate School of Agriculture, Meiji University, Kanagawa, Japan
| | - Kotaro Horiguchi
- Laboratory of Anatomy and Cell Biology, Department of Health Sciences, Kyorin University, Tokyo, Japan
| | - Yukio Kato
- Division of Life Science, Graduate School of Agriculture, Meiji University, Kanagawa, Japan. .,Institute of Reproduction and Endocrinology, Meiji University, Kanagawa, Japan. .,Department of Life Science, School of Agriculture, Meiji University, Kanagawa, Japan.
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13
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Cayuso J, Dzementsei A, Fischer JC, Karemore G, Caviglia S, Bartholdson J, Wright GJ, Ober EA. EphrinB1/ EphB3b Coordinate Bidirectional Epithelial-Mesenchymal Interactions Controlling Liver Morphogenesis and Laterality. Dev Cell 2017; 39:316-328. [PMID: 27825440 PMCID: PMC5107609 DOI: 10.1016/j.devcel.2016.10.009] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 07/24/2016] [Accepted: 10/10/2016] [Indexed: 11/25/2022]
Abstract
Positioning organs in the body often requires the movement of multiple tissues, yet the molecular and cellular mechanisms coordinating such movements are largely unknown. Here, we show that bidirectional signaling between EphrinB1 and EphB3b coordinates the movements of the hepatic endoderm and adjacent lateral plate mesoderm (LPM), resulting in asymmetric positioning of the zebrafish liver. EphrinB1 in hepatoblasts regulates directional migration and mediates interactions with the LPM, where EphB3b controls polarity and movement of the LPM. EphB3b in the LPM concomitantly repels hepatoblasts to move leftward into the liver bud. Cellular protrusions controlled by Eph/Ephrin signaling mediate hepatoblast motility and long-distance cell-cell contacts with the LPM beyond immediate tissue interfaces. Mechanistically, intracellular EphrinB1 domains mediate EphB3b-independent hepatoblast extension formation, while EpB3b interactions cause their destabilization. We propose that bidirectional short- and long-distance cell interactions between epithelial and mesenchyme-like tissues coordinate liver bud formation and laterality via cell repulsion.
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Affiliation(s)
- Jordi Cayuso
- Division of Developmental Biology, Mill Hill Laboratories, The Francis Crick Institute, London NW7 1AA, UK
| | - Aliaksandr Dzementsei
- Danish Stem Cell Center (DanStem), University of Copenhagen, 2200 Copenhagen N, Denmark
| | - Johanna C Fischer
- Division of Developmental Biology, Mill Hill Laboratories, The Francis Crick Institute, London NW7 1AA, UK
| | - Gopal Karemore
- Novo Nordisk Foundation Center for Protein Research, Protein Imaging Platform, University of Copenhagen, 2200 Copenhagen N, Denmark
| | - Sara Caviglia
- Danish Stem Cell Center (DanStem), University of Copenhagen, 2200 Copenhagen N, Denmark
| | - Josefin Bartholdson
- Wellcome Trust Sanger Institute, Cell Surface Signalling Laboratory, Cambridge CB10 1HH, UK
| | - Gavin J Wright
- Wellcome Trust Sanger Institute, Cell Surface Signalling Laboratory, Cambridge CB10 1HH, UK
| | - Elke A Ober
- Division of Developmental Biology, Mill Hill Laboratories, The Francis Crick Institute, London NW7 1AA, UK; Danish Stem Cell Center (DanStem), University of Copenhagen, 2200 Copenhagen N, Denmark.
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14
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Zhang G, Liu X, Li Y, Wang Y, Liang H, Li K, Li L, Chen C, Sun W, Ren S, Zhu P, Zhang L. EphB3-targeted regulation of miR-149 in the migration and invasion of human colonic carcinoma HCT116 and SW620 cells. Cancer Sci 2017; 108:408-418. [PMID: 28370854 PMCID: PMC5378266 DOI: 10.1111/cas.13161] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [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: 07/28/2016] [Revised: 12/28/2016] [Accepted: 12/30/2016] [Indexed: 01/07/2023] Open
Abstract
microRNAs play key roles during various crucial cell processes such as proliferation, migration, invasion and apoptosis. Also, microRNAs have been shown to possess oncogenic and tumor‐suppressive functions in human cancers. Here, we describe the regulation and function of miR‐149 in colorectal cancer cell lines. miR‐149 expression patterns were detected in human colorectal cell lines and tissue samples, and then focused on its role in regulation of cell growth, migration, invasion, and its target gene identification. Furthermore, the function of the target gene of miR‐149 was analyzed in vitro and in vivo. miR‐149 expression was downregulated in human colorectal cancer HCT116 and SW620 cell lines compared to the normal colon epithelial NCM460 cell line using quantitative real‐time polymerase chain reaction methods. Further studies indicated that introduction of miR‐149 was able to suppress cell migration and invasion. Then, EphB3 was identified as a direct target gene of miR‐149 in colorectal cancer cells. Moreover, experiments in vitro showed that knockdown expression of EphB3 could suppress cell proliferation and invasion, and ectopic expression of EphB3 restored the phenotypes of CRC cell lines transfected with miR149. In addition, silencing of EphB3 significantly affected cycle progression distribution and increased apoptosis in CRC cell lines. Finally, in vivo results demonstrated that knockdown of EphB3 by siRNA inhibited tumor growth. In conclusion,the important role of miR‐149 in colorectal cancer progression suggesting that miR‐149 may serve as a therapeutic target for colorectal cancer treatment.
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Affiliation(s)
- Guodong Zhang
- Department of Medical Oncology, Cancer Center of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Xiaozhu Liu
- School of Light Industry Engineering, Guizhou Institute of Technology, Guiyang, Guizhou, China
| | - Yinfeng Li
- School of Light Industry Engineering, Guizhou Institute of Technology, Guiyang, Guizhou, China
| | - Yan Wang
- Shangdong Medicine Technician College, Tai'an, Shandong, China
| | - Huankun Liang
- Guangzhou Youdi Biotechnology Company, Guangzhou, Guangdong, China
| | - Kangyan Li
- Guangzhou Youdi Biotechnology Company, Guangzhou, Guangdong, China
| | - Laiqing Li
- Guangzhou Youdi Biotechnology Company, Guangzhou, Guangdong, China
| | - Cuicui Chen
- Guangzhou Youdi Biotechnology Company, Guangzhou, Guangdong, China
| | - Wenqiao Sun
- Cancer Center of The 88 Hospital of People's Liberation Army, Tai'an, Shandong, China
| | - Shoulei Ren
- Shangdong Medicine Technician College, Tai'an, Shandong, China
| | - Pengfei Zhu
- Shangdong Medicine Technician College, Tai'an, Shandong, China
| | - Licheng Zhang
- Cancer Center of The 88 Hospital of People's Liberation Army, Tai'an, Shandong, China
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15
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Gao W, Zhang Q, Wang Y, Wang J, Zhang S. EphB3 protein is associated with histological grade and FIGO stage in ovarian serous carcinomas. APMIS 2017; 125:122-127. [PMID: 28120491 DOI: 10.1111/apm.12646] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [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: 09/10/2016] [Accepted: 11/08/2016] [Indexed: 12/21/2022]
Abstract
Eph (Erythropoietin-producing human hepatocellular carcinoma cell) is the largest subfamily of receptor tyrosine kinases. Eph receptors and their ephrin ligands are involved in embryonic development and physiological processes. Aberrant expression of Eph/ephrin may contribute to a variety of diseases including cancer. EphB3 is a member of Eph receptors and has been found to play roles in carcinogenesis of some types of human cancer. But, its expression and clinical significance in ovarian serous carcinoma have not been well investigated and are unknown. In this study, a set of ovarian tissues including normal fallopian tube, serous borderline tumor, and serous carcinoma were subjected to immunohistochemistry using a specific polyclonal antibody for EphB3. The relationship between EphB3 expression and clinicopathological parameters was statistically analyzed. EphB3 was strongly expressed in all fallopian tube specimens (19/19, 100%). EphB3 was negatively or weekly expressed in 1 of 17 (5.8%) in borderline tumors and 26 of 50 (52.0%) in serous carcinomas, moderately expressed in 7 of 17 (41.2%) in borderline tumors and 14 of 50 (28%) in serous carcinomas, and strongly expressed in 9 17 (52.9%) in borderline tumors and 10 of 50 (20%) in serous carcinomas. EphB3 expression is significantly reduced in serous carcinomas compared with normal fallopian tubes and borderline tumors (p < 0.001). EphB3 expression is negatively associated with histological grade (p < 0.001, rs = -0.613) and FIGO stage (p = 0.001, rs = -0.464) of serous carcinomas. Our results show EphB3 protein lost in ovarian serous carcinoma and is associated with tumor grade and FIGO stage, which indicate EphB3 protein may play a role in carcinogenesis of ovarian serous carcinoma and may be used as a molecular marker for prognosis.
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Affiliation(s)
- Weiwei Gao
- Department of Gynecology and Obstetrics, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
| | - Qin Zhang
- Department of Pathology, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
| | - Yan Wang
- Department of Pathology, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
| | - Jiandong Wang
- Department of Pathology, Jinling Hospital, Nanjing, China
| | - Shu Zhang
- Department of Pathology, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
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16
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Li JJ, Sun ZJ, Yuan YM, Yin FF, Bian YG, Long LY, Zhang XL, Xie D. EphB3 Stimulates Cell Migration and Metastasis in a Kinase-dependent Manner through Vav2-Rho GTPase Axis in Papillary Thyroid Cancer. J Biol Chem 2016; 292:1112-1121. [PMID: 27986811 DOI: 10.1074/jbc.m116.750349] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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: 07/28/2016] [Revised: 11/28/2016] [Indexed: 12/18/2022] Open
Abstract
Eph receptors, the largest subfamily of transmembrane tyrosine kinase receptors, have been increasingly implicated in various physiologic and pathologic processes, and the roles of the Eph family members during tumorigenesis have recently attracted growing attentions. In the present study, we explored the function of EphB3, one member of Eph family, in papillary thyroid cancer (PTC). We found that the expression of EphB3 was significantly elevated in PTC. Either overexpression of EphB3 or activation of EphB3 by EfnB1-Fc/EfnB2-Fc stimulated in vitro migration of PTC cells. In contrast, siRNA-mediated knockdown of EphB3 or EphB3-Fc treatment, which only blocked EphB3-mediated forward signaling, inhibited migration and metastasis of PTC cells. A mechanism study revealed that EphB3 knockdown led to suppressed activity of Rac1 and enhanced activity of RhoA. Moreover, we found that Vav2, an important regulator of Rho family GTPases, was activated by EphB3 in a kinase-dependent manner. Altogether, our work suggested that EphB3 acted as a tumor promoter in PTC by increasing the in vitro migration as well as the in vivo metastasis of PTC cells through regulating the activities of Vav2 and Rho GTPases in a kinase-dependent manner.
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Affiliation(s)
- Jing-Jing Li
- From the Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China and
| | - Zhi-Jian Sun
- From the Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China and
| | - Yan-Mei Yuan
- From the Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China and
| | - Fen-Fen Yin
- From the Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China and
| | - Yao-Gang Bian
- the Department of General Surgery, Fengxian Hospital Affiliated to Southern Medical University, 6600 Nanfeng Road, Shanghai 201499, China
| | - Ling-Yun Long
- From the Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China and
| | - Xue-Li Zhang
- the Department of General Surgery, Fengxian Hospital Affiliated to Southern Medical University, 6600 Nanfeng Road, Shanghai 201499, China
| | - Dong Xie
- From the Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China and
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17
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Overman RC, Debreczeni JE, Truman CM, McAlister MS, Attwood TK. Completing the structural family portrait of the human EphB tyrosine kinase domains. Protein Sci 2014; 23:627-38. [PMID: 24677421 DOI: 10.1002/pro.2445] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [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: 12/20/2013] [Revised: 02/12/2014] [Accepted: 02/12/2014] [Indexed: 11/09/2022]
Abstract
The EphB receptors have key roles in cell morphology, adhesion, migration and invasion, and their aberrant action has been linked with the development and progression of many different tumor types. Their conflicting expression patterns in cancer tissues, combined with their high sequence and structural identity, present interesting challenges to those seeking to develop selective therapeutic molecules targeting this large receptor family. Here, we present the first structure of the EphB1 tyrosine kinase domain determined by X-ray crystallography to 2.5Å. Our comparative crystalisation analysis of the human EphB family kinases has also yielded new crystal forms of the human EphB2 and EphB4 catalytic domains. Unable to crystallize the wild-type EphB3 kinase domain, we used rational engineering (based on our new structures of EphB1, EphB2, and EphB4) to identify a single point mutation which facilitated its crystallization and structure determination to 2.2 Å. This mutation also improved the soluble recombinant yield of this kinase within Escherichia coli, and increased both its intrinsic stability and catalytic turnover, without affecting its ligand-binding profile. The partial ordering of the activation loop in the EphB3 structure alludes to a potential cis-phosphorylation mechanism for the EphB kinases. With the kinase domain structures of all four catalytically competent human EphB receptors now determined, a picture begins to emerge of possible opportunities to produce EphB isozyme-selective kinase inhibitors for mechanistic studies and therapeutic applications.
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Affiliation(s)
- Ross C Overman
- AstraZeneca PLC, Alderley Park, Cheshire, SK10 4TG, United Kingdom
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Lee KH, Lee J, Shao D, Dravis C, Henkemeyer M. Asymmetry in semicircular canal diameters may account for circling behavior in EphB-deficient mice. Laryngoscope 2013; 124:E278-82. [PMID: 24353053 DOI: 10.1002/lary.24506] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 08/20/2013] [Revised: 10/30/2013] [Accepted: 11/04/2013] [Indexed: 11/09/2022]
Abstract
OBJECTIVES/HYPOTHESIS Determine if differences in right and left semicircular size account for phenotypic behavior, indicating vestibulopathy in EphB deficient mice. STUDY DESIGN The diameters of the superior semicircular canals (SCC) were measured. The differences in the right and left superior SCC diameters were analyzed in homozygous EphB2 and EphB3 double knockout mice known to have head bobbing and circling behavior. Results were compared to similar analysis in wild type controls that displayed no signs of vestibulopathy. METHODS Axial frozen sections through the superior (SCC) were analyzed by light microscopy; and the diameters of the left and right canals were measured in μm for both EphB2 and EphB3 double knockout mice, as well as in wild type control mice. The differences in diameter between the left and right superior SCC was determined for each animal. RESULTS Overall, the EphB2 and EphB3 double knockout mice had smaller superior SCC diameters compared to wild type (109.0±21.4 μm vs. 185.0±5.2 μm (P<0.0001). The mean difference in left and right diameter of the superior SCC of EphB2/EphB3 double knockout mice was 29.0±8.7 μm; in wild-type controls this difference was 6.0±5.1 μm (P=0.002). In addition, the direction of circling appeared to be independent of the laterality of the smaller (or larger) superior SCC. CONCLUSION Mice deficient in EphB2/EphB3 signaling have smaller superior SCC and asymmetry in lumen sizes between the left and right sides. The laterality of the larger versus smaller is not correlated with the direction of circling behavior. LEVEL OF EVIDENCE N/A.
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Affiliation(s)
- Kenneth H Lee
- Department of Otolaryngology-Head and Neck Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, U.S.A
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