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Th1-involved immune infiltrates improve neoadjuvant chemoradiotherapy response of esophageal squamous cell carcinoma. Cancer Lett 2023; 553:215959. [PMID: 36279981 DOI: 10.1016/j.canlet.2022.215959] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 09/28/2022] [Accepted: 10/08/2022] [Indexed: 11/20/2022]
Abstract
Neoadjuvant chemoradiotherapy (NCRT) followed by surgery is recommended for locally advanced esophageal squamous cell carcinoma (ESCC) treatment. Patients who achieve a pathological complete response (pCR) have better survival. Our study aimed to discover immune-associated predictors of pCR in ESCC. Herein, we found that Th1-cell infiltration inferred from RNA sequencing was higher in the pCR group than in the non-pCR group. Multiplexed immunohistochemistry (mIHC) confirmed that Th1-, CD8+ T-, NK-, NKT-, and dendritic-cell infiltration was positively associated with pCR. The spatial relationships between Th1 cells and CD8+ T, NK, NKT, dendritic, or ESCC cells were significant pCR predictors. The active and desert subtypes were identified based on immune cell infiltration, and showed different pCR rates. In vitro experiments confirmed that Th1 cells inhibited the proliferation and improved the chemosensitivity and radiosensitivity of ESCC cells. Th1 cells upregulated interferon-gamma response signaling and antigen presentation pathways and downregulated lipid metabolism and MAPK pathways of ESCC cells. These findings highlight the important role of Th1 cells as the predictor of pCR and the regulator of chemosensitivity and radiosensitivity of ESCC, and suggest elevating Th1-infiltration as a strategy to improve NCRT response.
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Li X, Tian D, Guo Y, Qiu S, Xu Z, Deng W, Su M. Genomic characterization of a newly established esophageal squamous cell carcinoma cell line from China and published esophageal squamous cell carcinoma cell lines. Cancer Cell Int 2020; 20:184. [PMID: 32489320 PMCID: PMC7247234 DOI: 10.1186/s12935-020-01268-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Accepted: 05/14/2020] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Esophageal squamous cell carcinoma (ESCC) is one of the most prevalent malignancies and a major cause of cancer related death worldwide, especially in China. Cell lines are widely used disease models for basic medical research, however, well characterized ESCC cell models from China were seldom reported. Misidentifying and cross-contaminations of cell lines also hamper the way of producing solid and reproductive data. METHODS CSEC216 was originated from a 45-year-old male ESCC patient from Chaoshan littoral, China. Specimens were minced into fragments and seeded in T-25 flask for primary culture. Immunoflourescence staining was performed for identifying the origination and proliferation activity. In vitro migration and invasion abilities was tested by transwell assay. DNA Short Tandem Repeats profiling was implemented for cell authorization. Karyotype was investigated by spectrum karyotyping. Whole genome sequencing was utilized to investigate genomic alterations. Background information and genomic mutation data of published ESCC cell lines were obtained from online databases. RESULTS CSEC216 was an uncontaminated cell line, exhibited epithelial cell features with polygonal morphology and adherent growth as monolayer. Immuno staining demonstrated its epithelial origination and high proliferation rate. The Population Doubling time was 29.7 h. The karyotype demonstrated tumor cell patterns with aneuploidy and complex chromosomal aberrations. Mutation signatures, genes with SNA or CNA of CSEC216 and published ESCC cell lines were similar with the mutation spectrum of original ESCC tumors. CONCLUSIONS ESCC cell line CSEC216 from high incidence region in China was established with no cross-contamination. Biological features were studied. Genomic mutation features of CSEC216 and 28 ESCC cell lines were characterized which provided thorough cytogenetic background that facilitated future usage.
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Affiliation(s)
- Xiang Li
- Institute of Clinical Pathology, Guangodng Provincial Key Laboratory of Infectious Disease and Molecular Immunopathology, Shantou University Medical College, No. 22 Xinling Road, Shantou, Guangdong Province 515041 People’s Republic of China
- The Judicial Critical Center, Shantou University Medical College, Shantou University Medical College, No. 22 Xinling Road, Shantou, Guangdong Province 515041 People’s Republic of China
| | - Dongping Tian
- Institute of Clinical Pathology, Guangodng Provincial Key Laboratory of Infectious Disease and Molecular Immunopathology, Shantou University Medical College, No. 22 Xinling Road, Shantou, Guangdong Province 515041 People’s Republic of China
- The Judicial Critical Center, Shantou University Medical College, Shantou University Medical College, No. 22 Xinling Road, Shantou, Guangdong Province 515041 People’s Republic of China
| | - Yi Guo
- Cancer Hospital of Shantou University Medical College, No. 7 Raoping Road, Shantou, Guangdong Province 515041 People’s Republic of China
| | - Shiyue Qiu
- Institute of Clinical Pathology, Guangodng Provincial Key Laboratory of Infectious Disease and Molecular Immunopathology, Shantou University Medical College, No. 22 Xinling Road, Shantou, Guangdong Province 515041 People’s Republic of China
- The Judicial Critical Center, Shantou University Medical College, Shantou University Medical College, No. 22 Xinling Road, Shantou, Guangdong Province 515041 People’s Republic of China
| | - Zexin Xu
- Institute of Clinical Pathology, Guangodng Provincial Key Laboratory of Infectious Disease and Molecular Immunopathology, Shantou University Medical College, No. 22 Xinling Road, Shantou, Guangdong Province 515041 People’s Republic of China
- The Judicial Critical Center, Shantou University Medical College, Shantou University Medical College, No. 22 Xinling Road, Shantou, Guangdong Province 515041 People’s Republic of China
| | - Wen Deng
- School of Nursing, Li Ka Shing Faculty of Medicine, The University of Hong Kong, 3/F, William MW Mong Block 21 Sassoon Road, Pokfulam, Hong Kong SAR, China
| | - Min Su
- Institute of Clinical Pathology, Guangodng Provincial Key Laboratory of Infectious Disease and Molecular Immunopathology, Shantou University Medical College, No. 22 Xinling Road, Shantou, Guangdong Province 515041 People’s Republic of China
- The Judicial Critical Center, Shantou University Medical College, Shantou University Medical College, No. 22 Xinling Road, Shantou, Guangdong Province 515041 People’s Republic of China
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3
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Abstract
Macroscopic examination of the surgical specimen of esophageal squamous cell carcinoma by pathologist is important for quality clinical management, research, as well as education purposes. The process includes dissection of the specimen, identification of the lesion, measurements, and taking appropriate samples for histopathological examination. The basic principle of the examination is to study the characteristics and extent of the cancer. In addition, examination of proximal resection margin and circumferential resection margin are important in the cancer. A standardized approach for macroscopic examination by professionals is needed for accurate diagnosis and to optimize the use of the surgical specimen with esophageal squamous cell carcinoma.
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Zhang Y, Luo J, Dong X, Yang F, Zhang M, Zhao J, Wang Q, Zhou F, Sun J, Yang X. Establishment and Characterization of Two Novel Cholangiocarcinoma Cell Lines. Ann Surg Oncol 2019; 26:4134-4147. [PMID: 31359275 PMCID: PMC6787115 DOI: 10.1245/s10434-019-07649-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Indexed: 12/19/2022]
Abstract
Background Cholangiocarcinoma (CCA) is a rare, aggressive and highly lethal tumor. The disease is very difficult to diagnose and multi-modality treatments are ineffective. To improve our understanding of the biological characteristics of CCA, and facilitate the identification of valid treatments, an in-depth characterization of two novel Chinese patient-derived primary CCA cell lines was performed. Methods Two CCA cell lines were developed and labelled ZJU-0826 and -1125. The two cell lines were characterized with respect to phenotypic, molecular, biomarker, functional and histological properties. Results Two novel cell lines were cultured for 2 years, and maintained for more than 100 passages. They retained their typical biliary epithelial morphology and ultrastructure. The population doubling times of ZJU-0826, and -1125 were 63.84 h and 44.73 h, respectively. The cells exhibited near-triploid karyotypes with complex structural aberrations. ZJU-1125 cells had mutations in TP53 exons. Short tandem repeats genotyping confirmed the human origin and difference between lines. An immunophenotype analysis showed that ZJU-0826 is positive for CD44, CD29, Pdx1, CD236, FoxA1, FoxA2, and Nanog, and ZJU-1125 positive for CD44, CD29, CD133, Pdx1, FoxA1, FoxA2, and Nanog. ZJU-1125 had greater invasion ability in vitro and tumorigenicity than those of ZJU-0826. Conclusions Our results confirm the validity of the ZJU-0826 and -1125 as representative models for the elucidation of the molecular pathogenesis of perihilar CCA, and intrahepatic CCA in both in vitro and in vivo studies, respectively. Electronic supplementary material The online version of this article (10.1245/s10434-019-07649-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yanhua Zhang
- Department of Pathology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Jingfeng Luo
- Department of Radiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Xue Dong
- Department of Radiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Fang Yang
- Department of Pathology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Miaofeng Zhang
- Department of Orthopaedics, Second Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang, Hangzhou, China
| | - Juanjuan Zhao
- Department of Cardiology, Biomedical Research (Therapy) Center, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China
| | - Qiangfeng Wang
- Department of Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Fei Zhou
- Department of Radiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.
| | - Jihong Sun
- Department of Radiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.
| | - Xiaoming Yang
- Department of Radiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China. .,Image-Guided Bio-Molecular Intervention Research, Department of Radiology, University of Washington School of Medicine, Seattle, WA, USA.
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Islam F, Gopalan V, Law S, Tang JCO, Lam AKY. FAM134B promotes esophageal squamous cell carcinoma in vitro and its correlations with clinicopathologic features. Hum Pathol 2019; 87:1-10. [PMID: 30794892 DOI: 10.1016/j.humpath.2018.11.033] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 11/07/2018] [Accepted: 11/12/2018] [Indexed: 01/06/2023]
Abstract
Family with sequence similarity 134, member B (FAM134B) is an autophagy regulator of endoplasmic reticulum first discovered to be involved in the pathogenesis of esophageal squamous cell carcinoma (ESCC). The present study examined the functional behavior of FAM134B in cancer cells and the association of FAM134B expression with clinicopathologic factors in patients with ESCC. Expression at both the mRNA and protein levels was investigated using real-time polymerase chain reaction and immunohistochemistry. The results were correlated with the clinical and pathological features of the patients. In addition, in vitro functional assays were used to investigate the roles of FAM134B in ESCC cells in response to gene silencing with shRNA lentiviral particles. Overexpression of FAM134B mRNA and protein was present in 31.2% (n = 29/93) and 36.6% (n = 41/112), respectively, in tumors, whereas downregulation occurred in 39.8% (n = 37/93) and 63.4% (n = 71/112), respectively. Expression of FAM134B protein in ESCC correlated with histologic grade (P = .002) and pathologic stage (P = .012). In vitro suppression of FAM134B in ESCC induced significant reductions of cell proliferation and colony formation (P < .05). In addition, suppression of FAM134B caused reduction of wound healing, migration, and invasion capacities of ESCC. To conclude, FAM134B could play crucial roles in the initiation and progression of ESCC, and FAM134B protein expression has potential predictive value. Therefore, development of strategies targeting FAM134B could have therapeutic value in the management of patients with ESCC.
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Affiliation(s)
- Farhadul Islam
- Department of Cancer Molecular Pathology, School of Medicine, Griffith University, Gold Coast, Queensland, Australia; Department of Biochemistry and Molecular Biology, University of Rajshahi, Rajshahi-6205, Bangladesh
| | - Vinod Gopalan
- Department of Cancer Molecular Pathology, School of Medicine, Griffith University, Gold Coast, Queensland, Australia
| | - Simon Law
- Department of Surgery, The University of Hong Kong, Hong Kong (SAR), People's Republic of China
| | - Johnny Cheuk-On Tang
- State Key Laboratory of Chirosciences, Lo Ka Chung Centre for Natural Anti-cancer Drug Development, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong.
| | - Alfred King-Yin Lam
- Department of Cancer Molecular Pathology, School of Medicine, Griffith University, Gold Coast, Queensland, Australia.
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Boriachek K, Umer M, Islam MN, Gopalan V, Lam AK, Nguyen NT, Shiddiky MJA. An amplification-free electrochemical detection of exosomal miRNA-21 in serum samples. Analyst 2019; 143:1662-1669. [PMID: 29512659 DOI: 10.1039/c7an01843f] [Citation(s) in RCA: 91] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Recent evidence suggests that small non-coding RNAs such as microRNA (miRNA) encapsulated in exosomes represent an important mechanism of communication between the cells. Exosomal miRNAs play an important role in carcinogenesis via enhancing the cell to cell communication and targeting the cell growth molecular pathways which in turn facilitate metastasis in cancers. Despite progressive advances, the current methods for the exosomal miRNA detection mostly rely on labor-intensive sequencing approaches which are often prone to amplification bias and require costly and bulky equipment. Herein, we report an electrochemical approach for the detection of cancer-derived exosomal miRNAs in human serum samples by selectively isolating the target miRNA using magnetic beads pre-functionalized with capture probes and then directly adsorbing the targets onto a gold electrode surface. The level of adsorbed miRNA is detected electrochemically in the presence of an [Fe(CN)6]4-/3- redox system. This method enabled an excellent detection sensitivity of 1.0 pM with a relative standard deviation (%RSD) of <5.5% in cancer cells and serum samples (n = 8) collected from patients with colorectal adenocarcinoma (CRC). We believe that our approach could be useful in clinical settings for the quantification of exosomal miRNA in cancer patients.
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Affiliation(s)
- Kseniia Boriachek
- School of Environment and Science, Griffith University, Nathan Campus, QLD 4111, Australia.
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7
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Haque MH, Bhattacharjee R, Islam MN, Gopalan V, Nguyen NT, Lam AK, Shiddiky MJA. Colorimetric and electrochemical quantification of global DNA methylation using a methyl cytosine-specific antibody. Analyst 2018; 142:1900-1908. [PMID: 28516982 DOI: 10.1039/c7an00526a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We report a simple colorimetric (naked-eye) and electrochemical method for the rapid, sensitive and specific quantification of global methylation levels using only 25 ng of input DNA. Our approach utilises a three-step strategy; (i) initial adsorption of the extracted, purified and denatured bisulfite-treated DNA on a screen-printed gold electrode (SPE-Au), (ii) immuno-recognition of methylated DNA using a horseradish peroxidase (HRP)-conjugated methylcytosine (HRP-5mC) antibody and (iii) subsequent colorimetric detection by the enzymatic oxidation of 3,3',5,5'-tetramethylbenzidin (TMB)/H2O2 which generated a blue-coloured product in the presence of methylated DNA and HRP-5mC immunocomplex. As TMB(ox) is electroactive, it also produces detectable amperometric current at +150 mV versus a Ag pseudo-reference electrode (electrochemical detection). The assay could successfully differentiate 5-aza-2'-deoxycytidine drug-treated and untreated Jurkat DNA samples. It showed good reproducibility (relative standard deviation (% RSD) = <5%, for n = 3) with fairly good sensitivity (as low as 5% difference in methylation levels) and specificity while analysing various levels of global DNA methylation in synthetic samples and cell lines. The method has also been tested for analysing the methylation level in fresh tissue samples collected from eight patients with oesophageal squamous cell carcinoma. We believe that this assay could be potentially useful as a low-cost alternative for genome-wide DNA methylation analysis in point-of-care applications.
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Affiliation(s)
- Md Hakimul Haque
- Cancer Molecular Pathology laboratory in Menzies Health Institute Queensland, Griffith University and School of Medicine, Gold Coast, QLD 4222, Australia.
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8
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Islam MN, Masud MK, Nguyen NT, Gopalan V, Alamri HR, Alothman ZA, Hossain MSA, Yamauchi Y, Lamd AK, Shiddiky MJA. Gold-loaded nanoporous ferric oxide nanocubes for electrocatalytic detection of microRNA at attomolar level. Biosens Bioelectron 2017; 101:275-281. [PMID: 29096366 DOI: 10.1016/j.bios.2017.09.027] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 09/07/2017] [Accepted: 09/16/2017] [Indexed: 01/10/2023]
Abstract
A crucial issue in microRNA (miRNA) detection is the lack of sensitive method capable of detecting the low levels of miRNA in RNA samples. Herein, we present a sensitive and specific method for the electrocatalytic detection of miR-107 using gold-loaded nanoporous superparamagnetic iron oxide nanocubes (Au-NPFe2O3NC). The target miRNA was directly adsorbed onto the gold surfaces of Au-NPFe2O3NC via gold-RNA affinity interaction. The electrocatalytic activity of Au-NPFe2O3NC was then used for the reduction of ruthenium hexaammine(III) chloride (RuHex, [Ru(NH3)6]3+) bound with target miRNA. The catalytic signal was further amplified by using the ferri/ferrocyanide [Fe(CN)6]3-/4- system. These multiple signal enhancement steps enable our assay to achieve the detection limit of 100aM which is several orders of magnitudes better than most of the conventional miRNA sensors. The method was also successfully applied to detect miR-107 from cancer cell lines and a panel of tissue samples derived from patients with oesophageal squamous cell carcinoma with excellent reproducibility (% RSD = < 5%, for n = 3) and high specificity. The analytical accuracy of the method was validated with a standard RT-qPCR method. We believe that our method has the high translational potential for screening miRNAs in clinical samples.
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Affiliation(s)
- Md Nazmul Islam
- School of Natural Sciences, Griffith University, Nathan Campus, QLD 4111, Australia; Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan Campus, QLD 4111, Australia
| | - Mostafa Kamal Masud
- Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan Campus, QLD 4111, Australia; Australian Institute for Innovative Materials (AIIM), University of Wollongong, Squires Way, Innovation Campus, North Wollongong, NSW 2500, Australia
| | - Nam-Trung Nguyen
- Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan Campus, QLD 4111, Australia
| | - Vinod Gopalan
- Cancer Molecular Pathology Laboratory in School of Medicine, Menzies Health Institute Queensland, Griffith University, Gold Coast Campus, QLD 4222, Australia
| | - Hatem R Alamri
- Physics Department, Jamoum University College, Umm Al-Qura University, Makkah 21955, Saudi Arabia
| | - Zeid A Alothman
- Advanced Materials Research Chair, Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Md Shahriar Al Hossain
- Australian Institute for Innovative Materials (AIIM), University of Wollongong, Squires Way, Innovation Campus, North Wollongong, NSW 2500, Australia; International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 NamikiTsukuba, Ibaraki 305-0044, Japan
| | - Yusuke Yamauchi
- Australian Institute for Innovative Materials (AIIM), University of Wollongong, Squires Way, Innovation Campus, North Wollongong, NSW 2500, Australia; International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 NamikiTsukuba, Ibaraki 305-0044, Japan
| | - Alfred K Lamd
- Cancer Molecular Pathology Laboratory in School of Medicine, Menzies Health Institute Queensland, Griffith University, Gold Coast Campus, QLD 4222, Australia
| | - Muhammad J A Shiddiky
- School of Natural Sciences, Griffith University, Nathan Campus, QLD 4111, Australia; Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan Campus, QLD 4111, Australia.
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9
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Li B, Xu WW, Han L, Chan KT, Tsao SW, Lee NPY, Law S, Xu LY, Li EM, Chan KW, Qin YR, Guan XY, He QY, Cheung ALM. MicroRNA-377 suppresses initiation and progression of esophageal cancer by inhibiting CD133 and VEGF. Oncogene 2017; 36:3986-4000. [PMID: 28288140 PMCID: PMC5511242 DOI: 10.1038/onc.2017.29] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 12/29/2016] [Accepted: 01/11/2017] [Indexed: 02/05/2023]
Abstract
Esophageal cancer is one of the most lethal cancers worldwide with poor survival and limited therapeutic options. The discovery of microRNAs created a new milestone in cancer research. miR-377 is located in chromosome region 14q32, which is frequently deleted in esophageal squamous cell carcinoma (ESCC), but the biological functions, clinical significance and therapeutic implication of miR-377 in ESCC are largely unknown. In this study, we found that miR-377 expression was significantly downregulated in tumor tissue and serum of patients with ESCC. Both tumor tissue and serum miR-377 expression levels were positively correlated with patient survival. Higher serum miR-377 expression was inversely associated with pathologic tumor stage, distant metastasis, residual tumor status and chemoradiotherapy resistance. The roles of miR-377 in suppressing tumor initiation and progression, and the underlying molecular mechanisms were investigated. Results of in vitro and in vivo experiments showed that miR-377 overexpression inhibited the initiation, growth and angiogenesis of ESCC tumors as well as metastatic colonization of ESCC cells, whereas silencing of miR-377 had opposite effects. Mechanistically, miR-377 regulated CD133 and VEGF by directly binding to their 3' untranslated region. Moreover, systemic delivery of formulated miR-377 mimic not only suppressed tumor growth in nude mice but also blocked tumor angiogenesis and metastasis of ESCC cells to the lungs without overt toxicity to mice. Collectively, our study established that miR-377 plays a functional and significant role in suppressing tumor initiation and progression, and may represent a promising non-invasive diagnostic and prognostic biomarker and therapeutic strategy for patients with ESCC.
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MESH Headings
- AC133 Antigen/genetics
- Adult
- Aged
- Aged, 80 and over
- Animals
- Carcinoma, Squamous Cell/diagnosis
- Carcinoma, Squamous Cell/genetics
- Carcinoma, Squamous Cell/mortality
- Carcinoma, Squamous Cell/pathology
- Case-Control Studies
- Cell Line, Tumor
- Cell Transformation, Neoplastic/genetics
- Disease Progression
- Down-Regulation/genetics
- Esophageal Neoplasms/diagnosis
- Esophageal Neoplasms/genetics
- Esophageal Neoplasms/mortality
- Esophageal Neoplasms/pathology
- Esophageal Squamous Cell Carcinoma
- Female
- Gene Expression Regulation, Neoplastic
- HEK293 Cells
- Humans
- Male
- Mice
- Mice, Inbred BALB C
- Mice, Inbred NOD
- Mice, Nude
- Mice, SCID
- MicroRNAs/physiology
- Middle Aged
- Vascular Endothelial Growth Factor A/genetics
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Affiliation(s)
- B Li
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, China
- The University of Hong Kong-Shenzhen Institute of Research and Innovation (HKU-SIRI), Shenzhen, China
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
| | - W W Xu
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, China
- The University of Hong Kong-Shenzhen Institute of Research and Innovation (HKU-SIRI), Shenzhen, China
| | - L Han
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, China
- The University of Hong Kong-Shenzhen Institute of Research and Innovation (HKU-SIRI), Shenzhen, China
| | - K T Chan
- Department of Surgery, The University of Hong Kong, Pokfulam, China
| | - S W Tsao
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, China
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
| | - N P Y Lee
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
- Department of Surgery, The University of Hong Kong, Pokfulam, China
| | - S Law
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
- Department of Surgery, The University of Hong Kong, Pokfulam, China
| | - L Y Xu
- The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area, Shantou University Medical College, Shantou, China
| | - E M Li
- The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area, Shantou University Medical College, Shantou, China
| | - K W Chan
- The University of Hong Kong-Shenzhen Institute of Research and Innovation (HKU-SIRI), Shenzhen, China
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
- Department of Pathology, The University of Hong Kong, Pokfulam, China
| | - Y R Qin
- Department of Clinical Oncology, First Affiliated Hospital, Zhengzhou University, Zhengzhou, China
| | - X Y Guan
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
- Department of Clinical oncology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, China
| | - Q Y He
- College of Life Science and Technology, Jinan University, 601 West Huangpu Blvd., Guangzhou, China
| | - A L M Cheung
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, China
- The University of Hong Kong-Shenzhen Institute of Research and Innovation (HKU-SIRI), Shenzhen, China
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, 21 Sassoon Road, Pokfulam, Hong Kong, SAR, China. E-mail:
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10
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Islam MN, Gopalan V, Haque MH, Masud MK, Hossain MSA, Yamauchi Y, Nguyen NT, Lam AKY, Shiddiky MJA. A PCR-free electrochemical method for messenger RNA detection in cancer tissue samples. Biosens Bioelectron 2017; 98:227-233. [PMID: 28688308 DOI: 10.1016/j.bios.2017.06.051] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 06/19/2017] [Accepted: 06/25/2017] [Indexed: 11/17/2022]
Abstract
Despite having reliable and excellent diagnostic performances, the currently available messenger RNA (mRNA) detection methods mostly use enzymatic amplification steps of the target mRNA which is generally affected by the sample manipulations, amplification bias and longer assay time. This paper reports an amplification-free electrochemical approach for the sensitive and selective detection of mRNA using a screen-printed gold electrode (SPE-Au). The target mRNA is selectively isolated by magnetic separation and adsorbed directly onto an unmodified SPE-Au. The surface-attached mRNA is then measured by differential pulse voltammetry (DPV) in the presence of [Fe(CN)6]4-/3- redox system. This method circumvents the PCR amplification steps as well as simplifies the assay construction by avoiding multiple steps involved in conventional biosensing approaches of using recognition and transduction layers. Our method has demonstrated good sensitivity (LOD = 1.0pM) and reproducibility (% RSD = <5%, for n = 3) for detecting FAM134B mRNA in two cancer cell lines and a small cohort of clinical samples (number of samples = 26) collected from patients with oesophageal cancer. The analytical performance of our method is validated with a standard qRT-PCR analysis. We believe that our PCR-free approach holds a great promise for the analysis of tumor-specific mRNA in clinical samples.
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Affiliation(s)
- Md Nazmul Islam
- School of Natural Sciences, Griffith University, Nathan Campus, QLD 4111, Australia; Queensland Micro-, and Nanotechnology Centre, Griffith University, Nathan Campus, QLD 4111, Australia
| | - Vinod Gopalan
- Cancer Molecular Pathology Laboratory in School of Medicine, Menzies Health Institute Queensland, Griffith University, Gold Coast Campus, QLD 4222, Australia
| | - Md Hakimul Haque
- Cancer Molecular Pathology Laboratory in School of Medicine, Menzies Health Institute Queensland, Griffith University, Gold Coast Campus, QLD 4222, Australia
| | - Mostafa Kamal Masud
- Queensland Micro-, and Nanotechnology Centre, Griffith University, Nathan Campus, QLD 4111, Australia; Australian Institute for Innovative Materials (AIIM), University of Wollongong, Squires Way, Innovation Campus, North Wollongong, NSW 2519, Australia
| | - Md Shahriar Al Hossain
- Australian Institute for Innovative Materials (AIIM), University of Wollongong, Squires Way, Innovation Campus, North Wollongong, NSW 2519, Australia
| | - Yusuke Yamauchi
- Australian Institute for Innovative Materials (AIIM), University of Wollongong, Squires Way, Innovation Campus, North Wollongong, NSW 2519, Australia; International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Nam-Trung Nguyen
- Queensland Micro-, and Nanotechnology Centre, Griffith University, Nathan Campus, QLD 4111, Australia
| | - Alfred King-Yin Lam
- Cancer Molecular Pathology Laboratory in School of Medicine, Menzies Health Institute Queensland, Griffith University, Gold Coast Campus, QLD 4222, Australia
| | - Muhammad J A Shiddiky
- School of Natural Sciences, Griffith University, Nathan Campus, QLD 4111, Australia; Queensland Micro-, and Nanotechnology Centre, Griffith University, Nathan Campus, QLD 4111, Australia.
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11
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Haque MH, Gopalan V, Islam MN, Masud MK, Bhattacharjee R, Hossain MSA, Nguyen NT, Lam AK, Shiddiky MJA. Quantification of gene-specific DNA methylation in oesophageal cancer via electrochemistry. Anal Chim Acta 2017; 976:84-93. [PMID: 28576321 DOI: 10.1016/j.aca.2017.04.034] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 04/10/2017] [Accepted: 04/10/2017] [Indexed: 02/07/2023]
Abstract
Development of simple and inexpensive method for the analysis of gene-specific DNA methylation is important for the diagnosis and prognosis of patients with cancer. Herein, we report a relatively simple and inexpensive electrochemical method for the sensitive and selective detection of gene-specific DNA methylation in oesophageal cancer. The underlying principle of the method relies on the affinity interaction between DNA bases and unmodified gold electrode. Since the affinity trend of DNA bases towards the gold surface follows as adenine (A) > cytosine (C) > guanine (G)> thymine (T), a relatively larger amount of bisulfite-treated adenine-enriched unmethylated DNA adsorbs on the screen-printed gold electrodes (SPE-Au) in comparison to the guanine-enriched methylated sample. The methylation levels were (i.e., different level of surface attached DNA molecules due to the base dependent differential adsorption pattern) quantified by measuring saturated amount of charge-compensating [Ru(NH3)6]3+ molecules in the surface-attached DNAs by chronocoulometry as redox charge of the [Ru(NH3)6]3+ molecules quantitatively reflects the amount of the adsorbed DNA confined at the electrode surface. The assay could successfully distinguish methylated and unmethylated DNA sequences at single CpG resolution and as low as 10% differences in DNA methylation. In addition, the assay showed fairly good reproducibility (% RSD= <5%) with better sensitivity and specificity by analysing various levels of methylation in two cell lines and eight fresh tissues samples from patients with oesophageal squamous cell carcinoma. Finally, the method was validated with methylation specific-high resolution melting curve analysis and Sanger sequencing methods.
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Affiliation(s)
- Md Hakimul Haque
- Cancer Molecular Pathology Laboratory in Menzies Health Institute Queensland, Griffith University and School of Medicine, Gold Coast, QLD 4222, Australia; School of Natural Sciences, Griffith University, Nathan Campus, Nathan, QLD 4111, Australia
| | - Vinod Gopalan
- Cancer Molecular Pathology Laboratory in Menzies Health Institute Queensland, Griffith University and School of Medicine, Gold Coast, QLD 4222, Australia.
| | - Md Nazmul Islam
- School of Natural Sciences, Griffith University, Nathan Campus, Nathan, QLD 4111, Australia; Queensland Micro- and Nanotechnology Centre (QMNC), Griffith University, Nathan Campus, Nathan, QLD 4111, Australia
| | - Mostafa Kamal Masud
- School of Natural Sciences, Griffith University, Nathan Campus, Nathan, QLD 4111, Australia; Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, NSW 2519, Australia
| | - Ripon Bhattacharjee
- School of Natural Sciences, Griffith University, Nathan Campus, Nathan, QLD 4111, Australia; Queensland Micro- and Nanotechnology Centre (QMNC), Griffith University, Nathan Campus, Nathan, QLD 4111, Australia
| | - Md Shahriar Al Hossain
- Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, NSW 2519, Australia
| | - Nam-Trung Nguyen
- Queensland Micro- and Nanotechnology Centre (QMNC), Griffith University, Nathan Campus, Nathan, QLD 4111, Australia
| | - Alfred K Lam
- Cancer Molecular Pathology Laboratory in Menzies Health Institute Queensland, Griffith University and School of Medicine, Gold Coast, QLD 4222, Australia.
| | - Muhammad J A Shiddiky
- School of Natural Sciences, Griffith University, Nathan Campus, Nathan, QLD 4111, Australia; Queensland Micro- and Nanotechnology Centre (QMNC), Griffith University, Nathan Campus, Nathan, QLD 4111, Australia.
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12
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Kamal Masud M, Islam MN, Haque MH, Tanaka S, Gopalan V, Alici G, Nguyen NT, Lam AK, Hossain MSA, Yamauchi Y, Shiddiky MJA. Gold-loaded nanoporous superparamagnetic nanocubes for catalytic signal amplification in detecting miRNA. Chem Commun (Camb) 2017; 53:8231-8234. [DOI: 10.1039/c7cc04789d] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A nonenzymatic, amplification-free, and sensitive method for microRNA detection is reported using Au@NPFe2O3NC nanocubes.
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13
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Chen J, Yao K, Li Z, Deng C, Wang L, Yu X, Liang P, Xie Q, Chen P, Qin Z, Ye Y, Liu Z, Zhou F, Zhang Z, Han H. Establishment and characterization of a penile cancer cell line, penl1, with a deleterious TP53 mutation as a paradigm of HPV-negative penile carcinogenesis. Oncotarget 2016; 7:51687-51698. [PMID: 27351128 PMCID: PMC5239507 DOI: 10.18632/oncotarget.10098] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Accepted: 05/02/2016] [Indexed: 12/30/2022] Open
Abstract
PURPOSE To establish penile cancer (PeCa) cell lines for the study of molecular mechanisms of carcinogenesis and testing therapeutic reagents. MATERIALS AND METHODS We successfully established two PeCa cell lines from fresh tumor tissues from 21 cases. One cell line named Penl1 was isolated from a lymph node metastasis (LNM) of penile squamous cell carcinoma (PeSCC), usual type and comprehensively characterized here. Our in-depth characterization analysis of the Penl1 cell line included morphology, tumorigenicity, genetic characteristics, protein expression, biology, and chemosensitivity. Penl1 was authenticated by single tandem repeat (STR) DNA typing. RESULTS Comparative histomorphology, genetic characteristics, and protein expression patterns revealed essential similarities between the cell line and its corresponding LNM. In-depth characterization analysis of Penl1 cell line revealed tumorigenicity in immunodeficient mice, negative human papilloma virus (HPV) and mycoplasma infection, TP53 mutations and sensitivity to cisplatin and epirubicin. STR DNA typing did not match any cell lines within three international cell banks. The limitation of this study is that one patient cannot represent the complete heterogeneity of PeCa, especially primary tumor. CONCLUSIONS We established and characterized an HPV-negative and moderately differentiated PeCa cell model with a TP53 missense mutation from a PeSCC, usual type patient. A preliminarily study of carcinogenesis and chemosensitivity suggests that this cell model carries a tumor suppressor gene mutation and is sensitive to chemotherapy drugs.
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Affiliation(s)
- Jieping Chen
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Kai Yao
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Zaishang Li
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Chuangzhong Deng
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Liangjiao Wang
- Department of Endocrinology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xingsu Yu
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
- Center of Medical Imaging & Image-Guided Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Peili Liang
- Department of Gynecology, Sun Yat-sen Memorial Hospital, Guangzhou, China
| | - Qiankun Xie
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
- Center of Medical Imaging & Image-Guided Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Peng Chen
- Department of Urology, Affiliated Tumor Hospital of Xinjiang Medical University, Urumchi, China
| | - Zike Qin
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Yunlin Ye
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Zhuowei Liu
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Fangjian Zhou
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Zhenfeng Zhang
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
- Center of Medical Imaging & Image-Guided Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Hui Han
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, China
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14
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Xu WW, Li B, Lam AKY, Tsao SW, Law SYK, Chan KW, Yuan QJ, Cheung ALM. Targeting VEGFR1- and VEGFR2-expressing non-tumor cells is essential for esophageal cancer therapy. Oncotarget 2015; 6:1790-805. [PMID: 25595897 PMCID: PMC4359332 DOI: 10.18632/oncotarget.2781] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Accepted: 11/19/2014] [Indexed: 11/25/2022] Open
Abstract
Increasing appreciation of tumor heterogeneity and the tumor-host interaction has stimulated interest in developing novel therapies that target both tumor cells and tumor microenvironment. Bone marrow derived cells (BMDCs) constitute important components of the tumor microenvironment. In this study, we aim to investigate the significance of VEGFR1- and VEGFR2-expressing non-tumor cells, including BMDCs, in esophageal cancer (EC) progression and in VEGFR1/VEGFR2-targeted therapies. Here we report that VEGFR1 or VEGFR2 blockade can significantly attenuate VEGF-induced Src and Erk signaling, as well as the proliferation and migration of VEGFR1⁺ and VEGFR2⁺ bone marrow cells and their pro-invasive effect on cancer cells. Importantly, our in vivo data show for the first time that systemic blockade of VEGFR1⁺ or VEGFR2⁺ non-tumor cells with neutralizing antibodies is sufficient to significantly suppress esophageal tumor growth, angiogenesis and metastasis in mice. Moreover, our tissue microarray study of human EC clinical specimens showed the clinicopathological significance of VEGFR1 and VEGFR2 in EC, which suggest that anti-VEGFR1/VEGFR2 therapies may be particularly beneficial for patients with aggressive EC. In conclusion, this study demonstrates the important contributions of VEGFR1⁺ and VEGFR2⁺ non-tumor cells in esophageal cancer progression, and substantiates the validity of these receptors as therapeutic targets for this deadly disease.
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Affiliation(s)
- Wen Wen Xu
- Department of Anatomy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China.,The University of Hong Kong-Shenzhen Institute of Research and Innovation (HKU-SIRI), China
| | - Bin Li
- Department of Anatomy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China.,The University of Hong Kong-Shenzhen Institute of Research and Innovation (HKU-SIRI), China.,Centre for Cancer Research, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Alfred K Y Lam
- Department of Pathology, Griffith Medical School and Griffith Health Institute, Gold Coast Campus, Gold Coast, QLD 4222, Australia
| | - Sai Wah Tsao
- Department of Anatomy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China.,Centre for Cancer Research, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Simon Y K Law
- Centre for Cancer Research, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China.,Department of Surgery, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Kwok Wah Chan
- The University of Hong Kong-Shenzhen Institute of Research and Innovation (HKU-SIRI), China.,Centre for Cancer Research, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China.,Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Qiu Ju Yuan
- Department of Anatomy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Annie L M Cheung
- Department of Anatomy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China.,The University of Hong Kong-Shenzhen Institute of Research and Innovation (HKU-SIRI), China.,Centre for Cancer Research, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
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15
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Zhong D, Gu C, Shi L, Xun T, Li X, Liu S, Yu L. Obatoclax induces G1/G0-phase arrest via p38/p21(waf1/Cip1) signaling pathway in human esophageal cancer cells. J Cell Biochem 2015; 115:1624-35. [PMID: 24788582 DOI: 10.1002/jcb.24829] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Accepted: 04/29/2014] [Indexed: 12/15/2022]
Abstract
Pan-Bcl-2 family inhibitor obatoclax has been demonstrated to be effective against various cancers, of which the mechanism of action is not fully understood. In this study, we demonstrate that obatoclax suppressed esophageal cancer cell viability with concomitant G1/G0-phase cell cycle arrest. At the tested concentrations (1/2 IC50 and IC50), obatoclax neither induced PARP cleavage nor increased the Annexin V-positive population, suggesting G1/G0-phase arrest rather than apoptosis accounts for most of the reduction of cell viability produced by obatoclax. Double knockdown of Bak and Bax by small interference RNA failed to block obatoclax-induced G1/G0-phase arrest, implying its role in cell cycle progression is Bak/Bax-independent. The cell cycle arresting effect of obatoclax was associated with up-regulation of p21(waf1/Cip1). Knockdown of p21(waf1/Cip1) significantly attenuated obatoclax-induced G1/G0-phase arrest. Although obatoclax stimulated phosphorylation of Erk, p38, and JNK, pharmacological inhibition of p38 but not Erk or JNK blocked obatoclax-induced G1/G0-phase arrest. Moreover, knockdown of p38 abolished the cell cycle arresting effect of obatoclax. In consistent with this finding, inhibition of p38 blocked obatoclax-induced p21(waf1/Cip1) expression while inhibition of Erk or JNK failed to exert similar effect. To conclude, these findings suggest that obatoclax induced cell cycle arrest via p38/p21(waf1/Cip1) signaling pathway. This study may shed a new light on the anti-cancer activity of obatoclax in relation to cell cycle arrest.
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Affiliation(s)
- Desheng Zhong
- School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
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16
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Ayyoob K, Masoud K, Vahideh K, Jahanbakhsh A. Authentication of newly established human esophageal squamous cell carcinoma cell line (YM-1) using short tandem repeat (STR) profiling method. Tumour Biol 2015; 37:3197-204. [PMID: 26432330 DOI: 10.1007/s13277-015-4133-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Accepted: 09/21/2015] [Indexed: 01/13/2023] Open
Abstract
Cross-contamination during or early after establishment of a new cell line could result in the worldwide spread of a misidentified cell line. Therefore, newly established cell lines need to be authenticated by a reference standard method. This study was conducted to investigate the authenticity of a newly established epithelial cell line of human esophageal squamous cell carcinoma (ESCC) called YM-1 using short tandem repeat (STR) DNA profiling method. Primary human ESCC epithelial cells were cultured from the fresh tumor tissue of an adult female patient. Growth characteristics and epithelial originality of YM-1 cells were studied. Genomic DNA was isolated from YM-1 cells harvested at passage 22 and ESCC donor tumor sample on two different days to prevent probable DNA contamination. STR profiling was performed using AmpFℓSTR® Identifiler® Plus PCR Amplification Kit. To address whether YM-1 cells undergo genetic alteration as the passage number increases, STR profiling was performed again on harvested cells at passage 51. YM-1 cells grew as a monolayer with a population doubling time of 40.66 h. Epithelial originality of YM-1 cells was confirmed using ICC/IF staining of cytokeratins AE1/AE3. The STR profile of the ESCC donor tumor sample was the same with YM-1 cells at passage 22. However, STR profile of the donor tumor sample showed an off-ladder (OL) allele in their D7S820 locus. Also, re-profiling of YM-1 cells at passage 51 showed a loss of heterozygosity (LOH) at D18S51 locus. This suggests that long-term culture of cell lines may alter their DNA profile. Comparison of the DNA fingerprinting results in DSMZ, and ATCC STR profiling databases confirmed unique identity of YM-1 cell line. This study provides an easy, fast, and reliable procedure for authentication of newly established cell lines, which helps in preventing the spread of misidentified cells and improving the reproducibility and validity of experiments, consequently.
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Affiliation(s)
- Khosravi Ayyoob
- Department of Molecular Medicine, Faculty of Advanced Medical Technologies, Golestan University of Medical Sciences, Gorgan, Iran
| | - Khoshnia Masoud
- Golestan Research Center of Gastroenterology and Hepatology-GRCGH, Golestan University of Medical Sciences, Gorgan, Iran
| | - Kazeminejad Vahideh
- Department of Pathology, Golestan University of Medical Sciences, Gorgan, Iran
| | - Asadi Jahanbakhsh
- Metabolic Disorders Research Center, Golestan University of Medical Sciences, Gorgan, Iran.
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17
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Suppression of esophageal tumor growth and chemoresistance by directly targeting the PI3K/AKT pathway. Oncotarget 2015; 5:11576-87. [PMID: 25344912 PMCID: PMC4294385 DOI: 10.18632/oncotarget.2596] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 10/18/2014] [Indexed: 12/14/2022] Open
Abstract
Esophageal cancer is the sixth most common cause of cancer-related deaths worldwide. Novel therapeutic intervention is urgently needed for this deadly disease. The functional role of PI3K/AKT pathway in esophageal cancer is little known. In this study, our results from 49 pairs of human esophageal tumor and normal specimens demonstrated that AKT was constitutively active in the majority (75.5%) of esophageal tumors compared with corresponding normal tissues. Inhibition of the PI3K/AKT pathway with specific inhibitors, wortmannin and LY294002, significantly reduced Bcl-xL expression, induced caspase-3-dependent apoptosis, and repressed cell proliferation and tumor growth in vitro and in vivo without obvious toxic effects. Moreover, significantly higher expression level of p-AKT was observed in fluorouracil (5-FU)-resistant esophageal cancer cells. Inactivation of PI3K/AKT pathway markedly increased the sensitivity and even reversed acquired resistance of esophageal cancer cells to chemotherapeutic drugs in vitro. More importantly, the resistance of tumor xenografts derived from esophageal cancer cells with acquired 5-FU resistance to chemotherapeutic drugs was significantly abrogated by wortmannin treatment in animals. In summary, our data support PI3K/AKT as a valid therapeutic target and strongly suggest that PI3K/AKT inhibitors used in conjunction with conventional chemotherapy may be a potentially useful therapeutic strategy in treating esophageal cancer patients.
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18
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Chan KT, Choi MY, Lai KKY, Tan W, Tung LN, Lam HY, Tong DKH, Lee NP, Law S. Overexpression of transferrin receptor CD71 and its tumorigenic properties in esophageal squamous cell carcinoma. Oncol Rep 2014; 31:1296-304. [PMID: 24435655 DOI: 10.3892/or.2014.2981] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 11/18/2013] [Indexed: 11/05/2022] Open
Abstract
Esophageal squamous cell carcinoma (ESCC) is the predominant type of esophageal cancer in endemic Asian regions. In the present study, we investigated the clinical implication and role of transferrin receptor CD71 in ESCC. CD71 has a physiological role in cellular iron intake and is implicated in the carcinogenesis of various types of tumors. In our cohort, more than a 2-fold upregulation of the CD71 transcript was detected in 61.5% of patients using quantitative polymerase chain reaction. Immunohistochemical analysis also showed strong membranous and cytoplasmic localization of CD71 in paraffin-embedded tumors. Staining parallel tumor sections with the proliferative marker Ki-67 revealed that the pattern of Ki-67 staining was associated with CD71 expression. Analysis of clinicopathological data indicated that CD71 overexpression can be used as an indicator for advanced T4 stage (p=0.0307). These data suggested a strong link between CD71 and ESCC. Subsequent in vitro assays using short interfering RNA (siRNA) to suppress CD71 expression confirmed the tumorigenic properties of CD71 in ESCC; cell growth inhibition and cell cycle arrest at S phase were observed in CD71-suppressed cells. The underlying mechanism involved activation of the MEK/ERK pathway. In summary, the present study provides evidence showing the tumorigenic properties of CD71 in ESCC with clinical correlations and suggests targeting CD71 as a strategy for the treatment of ESCC.
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Affiliation(s)
- Kin Tak Chan
- Department of Surgery, The University of Hong Kong, Hong Kong, SAR, P.R. China
| | - Mei Yuk Choi
- Department of Surgery, The University of Hong Kong, Hong Kong, SAR, P.R. China
| | - Kenneth K Y Lai
- Department of Surgery, The University of Hong Kong, Hong Kong, SAR, P.R. China
| | - Winnie Tan
- Department of Surgery, The University of Hong Kong, Hong Kong, SAR, P.R. China
| | - Lai Nar Tung
- Department of Surgery, The University of Hong Kong, Hong Kong, SAR, P.R. China
| | - Ho Yu Lam
- Department of Surgery, The University of Hong Kong, Hong Kong, SAR, P.R. China
| | - Daniel K H Tong
- Department of Surgery, The University of Hong Kong, Hong Kong, SAR, P.R. China
| | - Nikki P Lee
- Department of Surgery, The University of Hong Kong, Hong Kong, SAR, P.R. China
| | - Simon Law
- Department of Surgery, The University of Hong Kong, Hong Kong, SAR, P.R. China
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19
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Establishment and characterization of a novel HPV-negative laryngeal squamous cell carcinoma cell line, FD-LSC-1, with missense and nonsense mutations of TP53 in the DNA-binding domain. Cancer Lett 2013; 342:92-103. [PMID: 24001612 DOI: 10.1016/j.canlet.2013.08.041] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Revised: 08/20/2013] [Accepted: 08/24/2013] [Indexed: 11/20/2022]
Abstract
Laryngeal squamous cell carcinoma (LSCC) is a common malignancy in China; however, publically available LSCC cell lines are few and not established from Chinese populations. Hence, novel and well-characterized LSCC cell lines of Chinese origin are urgently needed to provide researchers with a comprehensive database for LSCC research. From 40 cases of LSCC, we established a novel cell line that was maintained for more than 100 passages in vitro and was found to have typical epithelial morphology and ultrastructure. In-depth characterization analysis revealed polyploidy in DNA content; a doubling time of some 24h; high tumorigenicity in immunodeficient mice; higher invasive potential and more sensitive to radiation and cisplatin compared with HeLa cell line; upregulated Ki67, Notch1, EGFR, and CK5 protein levels; negative infection of human papillomavirus (HPV) and mycoplasma; expression of head and neck squamous cell carcinoma (HNSCC) biomarkers; mutations of TP53 in exons 5 and 8; a near-triploid karyotype with complex structural aberrations; and dozens of dysregulated genes and miRNAs. Cell authentication testing by the American Type Culture Collection (ATCC) confirmed the human origin of this cell line. Our findings indicate that a novel and well-differentiated LSCC cell line recapitulating the primary tumor's malignant characteristics is established and well characterized. It does not match any cell lines within the ATCC database and helps to elucidate the molecular pathogenesis of LSCC.
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20
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Li J, Li X, Li Y, Yang H, Wang L, Qin Y, Liu H, Fu L, Guan XY. Cell-specific detection of miR-375 downregulation for predicting the prognosis of esophageal squamous cell carcinoma by miRNA in situ hybridization. PLoS One 2013; 8:e53582. [PMID: 23301089 PMCID: PMC3536738 DOI: 10.1371/journal.pone.0053582] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 11/30/2012] [Indexed: 01/07/2023] Open
Abstract
MicroRNAs (miRNAs) play important roles in the regulation of genes associated with cancer development and progression. By the more deeply characterization of miRNAs’ effect in cancer development, it requires a useful tool to investigate expression and distribution of a miRNA in cancer cells and tissues. To fulfill this application demand, we developed a miRNA in situ hybridization (MISH) approach using the 2′-Fluoro modified miRNA probe in combination with enzyme-labeled fluorescence (ELF) signal amplification approach. MISH was used to study expression of miR-375 in esophageal squamous cell carcinoma (ESCC) cell lines and tissues using a tissue microarray (TMA) containing 300 cases. The results showed that our MISH approach is a practical way to detect expression and distribution of a tested miRNA in both cultured cells and archive tissue sections. MISH results also showed that miR-375 was frequently downregulated in ESCCs, which was significantly associated with advanced clinical stage (p = 0.003) tumor metastasis (p = 0.04) and poor outcome (p = 0.04) of ESCC. Moreover, the accuracy of MISH results could be confirmed by QRT-PCR. Our results demonstrated that MISH is a useful and reliable tool to study miRNA expression in solid tumors. Downregulation of miR-375 can be used as a biomarker to predict the outcome of ESCC.
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Affiliation(s)
- Jiangchao Li
- State Key Laboratory of Oncology in Southern China, Sun Yat-Sen University Cancer Center, Guangzhou, China
- Vascular Biology Research Institute, Guangdong Pharmaceutical University, Guangzhou, China
| | - Xiaodong Li
- Department of Thoracic Surgery, Sun Yat-Sen University Cancer Center, Guangzhou, China
| | - Yan Li
- State Key Laboratory of Oncology in Southern China, Sun Yat-Sen University Cancer Center, Guangzhou, China
| | - Hong Yang
- Department of Thoracic Surgery, Sun Yat-Sen University Cancer Center, Guangzhou, China
| | - Lijing Wang
- Vascular Biology Research Institute, Guangdong Pharmaceutical University, Guangzhou, China
| | - Yanru Qin
- Department of Oncology, The First Affiliated Hospital, Zhengzhou University, Zhengzhou, China
| | - Haibo Liu
- State Key Laboratory of Oncology in Southern China, Sun Yat-Sen University Cancer Center, Guangzhou, China
| | - Li Fu
- Department of Clinical Oncology, The University of Hong Kong, Hong Kong, China
| | - Xin-Yuan Guan
- State Key Laboratory of Oncology in Southern China, Sun Yat-Sen University Cancer Center, Guangzhou, China
- Department of Clinical Oncology, The University of Hong Kong, Hong Kong, China
- * E-mail:
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21
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Cytoplasmic Forkhead box M1 (FoxM1) in esophageal squamous cell carcinoma significantly correlates with pathological disease stage. World J Surg 2012; 36:90-7. [PMID: 21976009 PMCID: PMC3243851 DOI: 10.1007/s00268-011-1302-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Abstract Esophageal cancer is a deadly cancer with esophageal squamous cell carcinoma (ESCC) as the major type. Until now there has been a lack of reliable prognostic markers for this malignancy. This study aims to investigate the clinical correlation between Forkhead box M1 (FoxM1) and patients’ parameters in ESCC. Methods Immunohistochemistry was performed to investigate the expression and localization of FoxM1 in 64 ESCC tissues and 10 nontumor esophageal tissues randomly selected from 64 patients before these data were used for clinical correlations. Results Cytoplasmic and nuclear expressions of FoxM1 were found in 63 and 16 of the 64 ESCC tissues, respectively. Low cytoplasmic expression of FoxM1 was correlated with early pathological stage in ESCC (P = 0.018), while patients with nuclear FoxM1 were younger in age than those without nuclear expression (P < 0.001). Upregulation of FoxM1 mRNA was found in five ESCC cell lines (HKESC-1, HKESC-2, HKESC-3, HKESC-4, and SLMT-1) when compared to non-neoplastic esophageal squamous cell line NE-1 using quantitative polymerase chain reaction (qPCR). Except for HKESC-3, all studied ESCC cell lines demonstrated a high expression of FoxM1 protein using immunoblot. A high mRNA level of FoxM1 was observed in all of the ESCC tissues examined when compared to their adjacent nontumor tissues using qPCR. Conclusion Cytoplasmic FoxM1 was correlated with pathological stage and might be a biomarker for advanced ESCC.
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Hui MKC, Lai KKY, Chan KW, Luk JM, Lee NP, Chung Y, Cheung LCM, Srivastava G, Tsao SW, Tang JC, Law S. Clinical correlation of nuclear survivin in esophageal squamous cell carcinoma. Med Oncol 2012; 29:3009-16. [PMID: 22528514 PMCID: PMC3505527 DOI: 10.1007/s12032-012-0225-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Accepted: 03/19/2012] [Indexed: 12/20/2022]
Abstract
To examine the correlation of survivin (both total and nuclear survivin) with clinicopathological parameters of esophageal squamous cell carcinoma (ESCC) patients. Tumors and non-tumor tissues near the proximal resection margins were resected from ESCC patients undergone esophagectomy. Quantitative polymerase chain reaction (qPCR) was performed to detect survivin mRNA expression level in the 10 paired tumor and adjacent non-tumor tissues. To confirm with the clinical situation, survivin mRNA and protein expression were measured by qPCR and immunoblot, respectively, in 5 ESCC cell lines and a non-neoplastic esophageal epithelial cell line. Immunohistochemistry was employed to reveal the cellular localization of survivin in tumor tissues isolated from the 64 ESCC patients undergone surgery alone. Up-regulation of survivin mRNA and protein was found in 5 ESCC lines (HKESC-1, HKESC-2, HKESC-3, HKESC-4, and SLMT-1) when compared to a non-neoplastic esophageal epithelial cell line NE-1. In particular, HKESC-3, HKESC-4, and SLMT-1 cells demonstrated ~50-fold increase in survivin mRNA. High level of survivin mRNA in tumor tissues when compared to non-tumor tissues was found in 70 % (7 of 10) of clinical cases. The increase in expression ranged from ~twofold to ~16-fold. Immunohistochemistry results showed that survivin was found at the cell nuclei in all specimens examined. Nuclear expression of survivin was inversely associated with the likelihood of developing nodal metastasis (p = 0.021) and significantly associated with early-stage ESCC (p = 0.039). Nuclear survivin could serve as a marker for indicating disease status in ESCC patients.
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Affiliation(s)
- Marco K. C. Hui
- Department of Surgery, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Kenneth K. Y. Lai
- Department of Surgery, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Kwok Wah Chan
- Department of Pathology, The University of Hong Kong, Hong Kong, China
| | - John M. Luk
- Department of Oncology, Roche R&D Center, pRED China, Shanghai, China
| | - Nikki P. Lee
- Department of Surgery, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Yvonne Chung
- Department of Surgery, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Leo C. M. Cheung
- Department of Surgery, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Gopesh Srivastava
- Department of Pathology, The University of Hong Kong, Hong Kong, China
| | - Sai Wah Tsao
- Department of Anatomy, The University of Hong Kong, Hong Kong, China
| | - Johnny C. Tang
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong, China
| | - Simon Law
- Department of Surgery, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong, China
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Gros SJ. Orthotopic models of esophageal carcinoma and their use in drug discovery. ACTA ACUST UNITED AC 2012; Chapter 14:Unit14.20. [PMID: 21898333 DOI: 10.1002/0471141755.ph1420s54] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The protocol detailed in this unit is for the establishment of an orthotopic model of human esophageal adenocarcinoma in NMRI/nu mice. The resultant tumor has high metastatic potential, spreading readily to liver, lungs, and lymph nodes. This model is useful for studying primary esophageal carcinoma, tumor biology, pathogenesis, tumor progression, metastatic homing, and the efficacy of therapeutic approaches for treating this condition. The practical use of this preclinical model for drug discovery is illustrated with data from a study on the chemotherapeutic effects of HER2-targeted therapy.
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Affiliation(s)
- Stephanie J Gros
- Department of General, Visceral, and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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24
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Prognostic significance of phosphorylated RON in esophageal squamous cell carcinoma. Med Oncol 2011; 29:1699-706. [PMID: 22086736 DOI: 10.1007/s12032-011-0112-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2011] [Accepted: 11/02/2011] [Indexed: 01/14/2023]
Abstract
Esophageal squamous cell carcinoma (ESCC) is the most common type of esophageal cancer. RON is a transmembrane receptor overexpressed in various cancers; however, the clinical significance of its phosphorylated form (pRON) is not fully deciphered. This report is the first to investigate the expression and clinical significance of pRON in human ESCC. Quantitative polymerase chain reaction revealed an up-regulation of RON mRNA in 70% (7/10) of ESCC tissues when compared to the adjacent nontumor tissues. An overexpression of pRON protein was found in most of the ESCC cell lines studied (4/5) when compared to two non-neoplastic esophageal epithelial cells using immunoblot. In 64 ESCC tissues, pRON was localized at the cell membrane, cytoplasm and nucleus in 15 (23.4%), 63 (98.4%) and 61 (95.3%) cases using immunohistochemistry. Patients having high expression of cytoplasmic pRON significantly associated with shorter median survival when compared to those with low expression (25.41 months vs. 14.43 months), suggesting cytoplasmic pRON as a potential marker for poor prognosis in ESCC patients.
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25
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Cheung PY, Yip YL, Tsao SW, Ching YP, Cheung ALM. Id-1 induces cell invasiveness in immortalized epithelial cells by regulating cadherin switching and Rho GTPases. J Cell Biochem 2011; 112:157-68. [PMID: 21053361 DOI: 10.1002/jcb.22911] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Epithelial-mesenchymal transition (EMT), characterized by cadherin switching, contributes to cancer metastasis. Our recent study showed that Id-1 (inhibitor of differentiation-1) promotes metastasis in esophageal cancer cells, but whether the invasive and metastatic dynamics can be induced early in the carcinogenesis process is still unclear. Immortalization is regarded as the initial stage in the malignant transformation of normal cells. In this study, we investigated the role and mechanisms of Id-1 in inducing EMT and cell invasiveness in immortalized esophageal epithelial cells. We found that immortalized epithelial cells expressed higher endogenous levels of Id-1 compared with normal cells. Ectopic Id-1 expression inhibited the differentiation of immortalized esophageal epithelial cells and promoted cadherin switching, which was accompanied by increased adhesiveness to extracellular matrix, cell motility, migratory potential and matrix metalloproteinase-dependent invasiveness. GTPase activity assays showed that over-expression or short-hairpin RNA knockdown of Id-1 led to corresponding changes in Rac1 activity, whereas RhoA activity was significantly decreased with Id-1 depletion. Inhibitors targeting Rac1, RhoA, and Rho kinase suppressed the invasiveness of Id-1-expressing NE2-hTERT cells. Knockdown of N-cadherin in Id-1-over-expressing cells inhibited cell invasiveness and down-regulated RhoA activity. These data suggest that the Id-1-induced invasive potential may be regulated through the N-cadherin-RhoA axis and Rac1 activation.
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Affiliation(s)
- P Y Cheung
- Department of Anatomy, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
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To KK, Yu L, Liu S, Fu J, Cho CH. Constitutive AhR activation leads to concomitant ABCG2-mediated multidrug resistance in cisplatin-resistant esophageal carcinoma cells. Mol Carcinog 2011; 51:449-64. [DOI: 10.1002/mc.20810] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2011] [Accepted: 05/12/2011] [Indexed: 12/15/2022]
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Zhang QB, Gao YP, He JT, Zhang TT, Lin P, Zhang J, Wang XJ. Establishment of a novel human esophageal squamous cell carcinoma cell line (ESC-410) and its partial biological characterization. Dis Esophagus 2011; 24:120-6. [PMID: 20819098 DOI: 10.1111/j.1442-2050.2010.01106.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Esophageal cancer exhibits an uneven geographical distribution strikingly, resulting in focal endemic high-incidence areas in several countries worldwide including China, which might be associated with the environmental and genetic risk factors in those areas. Permanent cancer cell lines are invaluable tools in understanding the biology of cancers and experimental therapeutics. To enrich cell line panel and animal models of human esophageal squamous cell carcinoma (ESCC) from different geographical areas and investigate the environmental and genetic risk factors in the carcinogenesis of ESCC, a novel human esophageal squamous cancer cell line (ESC-410) was established. The cell line grew adherent as a monolayer and maintained stable growth rate with a doubling time of 53 h and distinct epithelial morphological appearance; it was maintained in vitro for 18 months and subcultured for more than 50 passages. Ultrastructural examination revealed large irregular nuclei, desmosome, and tonofilaments; karyotype analysis showed a modal number of chromosomes that ranged from 35 to 73, with a median of 57, and 77% of analyzed cells were hyperdiploidy; reverse transcription polymerase chain reaction (RT-PCR) detected the mRNA expressions of CK8, CK18, and CK19 in the established cells; immunofluorescence assay identified the protein expressions of neurotrophin receptor p75 and integrin α6 (CD49f) in the ESC-410 cell line; xenotransplantation of ESC-410 cells into athymic nude mice subcutaneously induced the formation of solid tumor masses in about 2 weeks. By histopathological examination, heterogeneity of xenograft tumor was observed, as same as that of human primary ESCC. All findings and evidence in this experimental study suggested that this cell line might be a useful model in vitro and in vivo in cellular and molecular studies as well as in testing novel therapies for human ESCC.
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Affiliation(s)
- Q-B Zhang
- Laboratory of Geriatrics, State Key Laboratory of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Sichuan, China
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Yu L, Chen M, Li Z, Wen J, Fu J, Guo D, Jiang Y, Wu S, Cho CH, Liu S. Celecoxib antagonizes the cytotoxicity of cisplatin in human esophageal squamous cell carcinoma cells by reducing intracellular cisplatin accumulation. Mol Pharmacol 2010; 79:608-17. [PMID: 21177414 DOI: 10.1124/mol.110.069393] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
High cyclooxygenase 2 (COX-2) expression has been reported to be clinically associated with reduced cisplatin-based therapy efficacy in esophageal cancer. However, the benefit of including COX-2-selective inhibitors in therapeutic regimens remains uncertain. Thus, we sought to determine the effects of COX inhibitors on the cytotoxicity of cisplatin and to further explore the mechanism involved in human esophageal squamous cell carcinoma cells. Among the four tested COX inhibitors [celecoxib, 4-[5-(4-chlorophenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide (SC-236), nimesulide, and indomethacin], all of which substantially suppressed prostaglandin E(2) production to a similar extent; only the COX-2-selective inhibitors celecoxib and SC-236 antagonized cisplatin-induced cytotoxicity and apoptosis in both cisplatin-resistant cells and their wild-type counterparts. Knockdown of COX-2 by small interference RNA failed to mimic the antagonizing effects of celecoxib and SC-236, implying that their action is COX-2-independent. Further mechanistic analysis revealed that the antagonizing effect of celecoxib and SC-236 on cytotoxic action of cisplatin was associated with decreased whole-cell cisplatin accumulation and DNA platination. Reduced influx, accompanied by the reduction of protein level of copper transporter 1, accounts for decreased intracellular cisplatin accumulation. In addition, combined treatment did not elicit greater antitumor activity than cisplatin or celecoxib monotherapy in vivo in an esophageal cancer xenograft model. Collectively, these data demonstrate that celecoxib antagonizes the cytotoxicity of cisplatin by decreasing intracellular cisplatin and DNA platination. The combination treatment also shows no beneficial effect compared with cisplatin or celecoxib monotherapy in vivo. Therefore, current clinical trials with celecoxib in combination with cisplatin should be approached with caution.
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Affiliation(s)
- Le Yu
- School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China
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Prostaglandin E2promotes cell proliferationviaprotein kinase C/extracellular signal regulated kinase pathway-dependent induction of c-Myc expression in human esophageal squamous cell carcinoma cells. Int J Cancer 2009; 125:2540-6. [DOI: 10.1002/ijc.24607] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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30
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Cai Z, Zhou Y, Lei T, Chiu JF, He QY. Mammary serine protease inhibitor inhibits epithelial growth factor-induced epithelial-mesenchymal transition of esophageal carcinoma cells. Cancer 2009; 115:36-48. [PMID: 19090015 DOI: 10.1002/cncr.23991] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND By using proteomic technology, the authors previously observed the substantial down-regulation of mammary serine protease inhibitor (maspin) in esophageal squamous cell carcinoma and metastases. In the current study, they examined the effects of maspin re-expression in a maspin-null esophageal cancer cell line EC109 and also investigated the underlying mechanism. METHODS A cell line with stable maspin expression was established. An epithelial growth factor (EGF)-induced epithelial-mesenchymal transition (EMT) model was used to mimic some aspects of the metastatic process in vitro. The effects of maspin reintroduction on EGF-induced EMT and cell growth characteristics were evaluated. Comparative proteomic analysis of transfected cells versus parental cells was then performed to explore the potential mechanism. RESULTS The introduction of maspin into EC109 cells was able to inhibit EGF-induced EMT and altered cell growth characteristics, including the serum dependence, proliferative response to EGF stimulation, and colony formation ability in soft agar, indicating a conversion from a malignant phenotype to a benign phenotype. Proteomic analysis revealed a significant down-regulation of a group of glycolytic enzymes in maspin-transfected cells. In addition, maspin-transfected cells expressed much lower levels of hypoxia-inducible factor 1alpha than parental cells or empty vector transfected cells. CONCLUSIONS Maspin exhibited a metastasis-suppressive effect, which may be a consequence of the reversal of the malignant phenotype of EC109 cells. The switch of cellular metabolic phenotype to low glycolysis by the gain of maspin function may play a key role in the process. This finding provides additional evidence of the tumor metastasis-suppressive activity of maspin and may indicate a new direction for future studies of the mechanism of maspin.
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Affiliation(s)
- Zhen Cai
- Clinical Laboratory, Nanfang Hospital, Southern Medical University, Guangzhou, China
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31
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Yu L, Wu WKK, Li ZJ, Liu QC, Li HT, Wu YC, Cho CH. Enhancement of Doxorubicin Cytotoxicity on Human Esophageal Squamous Cell Carcinoma Cells by Indomethacin and 4-[5-(4-Chlorophenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide (SC236) via Inhibiting P-Glycoprotein Activity. Mol Pharmacol 2009; 75:1364-73. [DOI: 10.1124/mol.108.053546] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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32
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Shen C, Gu M, Liang D, Miao L, Hu L, Zheng C, Chen J. Establishment and characterization of three new human breast cancer cell lines derived from Chinese breast cancer tissues. Cancer Cell Int 2009; 9:2. [PMID: 19121212 PMCID: PMC2646685 DOI: 10.1186/1475-2867-9-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2008] [Accepted: 01/02/2009] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Breast cancer is a major malignancy affecting females worldwide. It is the most common cause of death from cancer in women. Cell lines are widely used in laboratory research and particularly as in vitro models in cancer research. But we found that the routinely used breast cancer cell lines were mostly derived from Caucasians or African-Americans. There were few standard models to study the pathogenic mechanism at molecular level and cell signaling pathway of breast cancer for Asian patients. It is quite necessary to establish new breast cancer cell lines from xanthoderm to study the pathogenic mechanism and therapeutic methods. RESULTS Three new breast cancer cell lines, designated BC-019, BC-020 and BC-021, were successfully established and characterized from breast invasive ductal carcinoma tissues of three Chinese female patients. These new cell lines growing as adherent monolayer with characteristic epithelial morphology could be maintained continuously in vitro, and they were ER-, PR- and C-erbB-2-positive. Their chromosomes showed high hyperdiploidy and complex rearrangements, and they displayed aggressive tumorigencity in tumorigenesis test. CONCLUSION The three newly established breast cancer cell lines from Chinese patients were tested for a number of, and the results indicate that the cell lines were in good quality and could be served as new cell models in breast cancer study.
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Affiliation(s)
- Chao Shen
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, PR China
- China Center for Type Culture Collection, Wuhan University, Wuhan 430072, PR China
| | - Meijia Gu
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, PR China
- China Center for Type Culture Collection, Wuhan University, Wuhan 430072, PR China
| | - Dan Liang
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, PR China
- China Center for Type Culture Collection, Wuhan University, Wuhan 430072, PR China
| | - Lixia Miao
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, PR China
| | - Liu Hu
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, PR China
| | - Congyi Zheng
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, PR China
- China Center for Type Culture Collection, Wuhan University, Wuhan 430072, PR China
| | - Jiakuan Chen
- Zhongnan Hospital, Wuhan University, Wuhan 430072, PR China
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Liu X, Wu WKK, Yu L, Sung JJY, Srivastava G, Zhang ST, Cho CH. Epinephrine stimulates esophageal squamous-cell carcinoma cell proliferation via beta-adrenoceptor-dependent transactivation of extracellular signal-regulated kinase/cyclooxygenase-2 pathway. J Cell Biochem 2008; 105:53-60. [PMID: 18452159 DOI: 10.1002/jcb.21802] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Esophageal cancer is the sixth leading causes of cancer-related death in the world. It is suggested that beta-adrenoceptor is involved in the control of cell proliferation, but its role in the pathogenesis of esophageal cancer remains unknown. We therefore studied the role of beta-adrenergic signaling in the regulation of growth of an esophageal squamous-cell carcinoma cell line HKESC-1. Results showed that both beta(1)- and beta(2)-adrenoceptors were expressed in HKESC-1 cells. Stimulation of beta-adrenoceptors with epinephrine significantly increased HKESC-1 cell proliferation accompanied by elevation of intracellular cyclic AMP levels, which were abolished by beta(1)- or beta(2)-selective antagonists. Epinephrine also increased extracellular signal-regulated kinase-1/2 (ERK1/2) phosphorylation as well as cyclooxygenase-2 (COX-2) and cytosolic phospholipase A(2) expression, which were blocked by beta(1)- or beta(2)-selective antagonists. Moreover, epinephrine increased cyclin D(1), cyclin E(2), cyclin-dependent kinase (CDK)-4, CDK-6, and E(2)F-1 expression and retinoblastoma protein phosphorylation at Ser807/811, all of which were abrogated by beta(1)-adrenoceptor antagonist. Furthermore, epinephrine increased the expression of vascular endothelial growth factor (VEGF), VEGF receptor (VEGFR)-1 and -2 in a beta(2)-adrenoceptor-, mitogen-activated protein kinase/ERK kinase (MEK)-, and COX-2-dependent manner. MEK or COX-2 inhibitor also significantly inhibited HKESC-1 cell proliferation induced by epinephrine. Collectively, we demonstrate that epinephrine stimulates esophageal squamous-cell carcinoma cell proliferation via beta-adrenoceptor-dependent transactivation of ERK/COX-2 pathway. Stimulation of beta(1)- and beta(2)-adrenoceptors also elicits a differential response on the expression of cell cycle regulators. These novel findings may shed new light on the understanding of beta-adrenergic signaling in the control of esophageal cancer cell growth.
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Affiliation(s)
- Xuan Liu
- Beijing Digestive Diseases Center and Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
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Yu L, Wu WKK, Li ZJ, Wong HPS, Tai EKK, Li HT, Wu YC, Cho CH. E series of prostaglandin receptor 2-mediated activation of extracellular signal-regulated kinase/activator protein-1 signaling is required for the mitogenic action of prostaglandin E2 in esophageal squamous-cell carcinoma. J Pharmacol Exp Ther 2008; 327:258-67. [PMID: 18583546 DOI: 10.1124/jpet.108.141275] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The use of nonsteroidal anti-inflammatory drugs is associated with a lower risk for esophageal squamous cell carcinoma, in which overexpression of cyclooxygenase-2 (COX-2) is frequently reported. Prostaglandin E(2) (PGE(2)), a COX-2-derived eicosanoid, is implicated in the promotion of cancer growth. However, the precise role of PGE(2) in the disease development of esophageal squamous cell carcinoma remains elusive. In this study, we investigated the effect of PGE(2) on the proliferation of cultured esophageal squamous cell carcinoma cells (HKESC-1). Results showed that HKESC-1 cells expressed all four series of prostaglandin (EP) receptors, namely, EP1 to EP4 receptors. In this regard, PGE(2) and the EP2 receptor agonist (+/-)-15-deoxy-16S-hydroxy-17-cyclobutyl PGE(1) methyl ester (butaprost) markedly increased HKESC-1 cell proliferation. Moreover, the mitogenic effect of PGE(2) was significantly attenuated by RNA interference-mediated knockdown of the EP2 receptor, indicating that this receptor mediated the mitogenic effect of PGE(2). In this connection, PGE(2) and butaprost induced phosphorylation of extracellular signal-regulated kinases 1/2 (Erk1/2), whose down-regulation by RNA interference significantly attenuated PGE(2)-induced cell proliferation. In addition, PGE(2) and butaprost increased c-Fos expression and activator protein 1 (AP-1) transcriptional activity, which were abolished by the mitogen-activated protein kinase/Erk kinase inhibitor 1,4-diamino-2,3-dicyano-1,4-bis(o-aminophenylmercapto)-butadiene ethanolate (U0126). AP-1-binding inhibitor curcumin also partially reversed the mitogenic effect of PGE(2). Taken together, these data demonstrate for the first time that the EP2 receptor mediates the mitogenic effect of PGE(2) in esophageal squamous cell carcinoma via activation of the Erk/AP-1 pathway. This study supports the growth-promoting action of PGE(2) in esophageal squamous cell carcinoma and the potential application of EP2 receptor antagonists in the treatment of this disease.
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Affiliation(s)
- Le Yu
- Department of Pharmacology, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
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Liu X, Wu WKK, Yu L, Li ZJ, Sung JJY, Zhang ST, Cho CH. Epidermal growth factor-induced esophageal cancer cell proliferation requires transactivation of beta-adrenoceptors. J Pharmacol Exp Ther 2008; 326:69-75. [PMID: 18369180 DOI: 10.1124/jpet.107.134528] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Unchecked mitogenic signals due to the overexpression of epidermal growth factor (EGF) and its receptor (EGFR) is implicated in the promotion and progression of cancer. In addition, beta-adrenoceptor is involved in the control of cancer cell proliferation. This study sought to elucidate whether a functional connection exists between these two disparate receptor systems. EGF was used to stimulate HKESC-1 cells, an esophageal squamous cancer cell line, in which beta-adrenoceptor activity was monitored by measuring intracellular cAMP levels in the absence or presence of beta-adrenoceptor antagonists. Results showed that EGF significantly increased cAMP levels and cell proliferation, both of which were attenuated by atenolol [(+)-4-[2-hydroxy-3-[(1-methylethyl)amino]propoxy]benzeneacetamide] or ICI 118,551 [(+/-)-1-[2,3-(dihydro-7-methyl-1H-inden-4-yl)oxy]-3-[(1-methylethyl)amino]-2-butanol], which are antagonists for the beta-adrenoceptor. Further mechanistic investigation revealed that the cellular release of epinephrine and the expression of its synthesizing enzyme tyrosine hydroxylase were induced by EGF. The expression of beta(1)-adrenoceptor and the downstream signal transducer protein kinase A were also up-regulated. In this connection, AG1478 [4-(3-chloroanilino)-6,7-dimethoxyquinazoline], an EGFR tyrosine kinase inhibitor, abrogated all these EGF-elicited alteration. Collectively, this study demonstrates that beta-adrenergic signaling could be up-regulated at multiple levels upon EGFR activation to mediate the mitogenic signals in esophageal cancer cells. This novel finding not only unveils the sinister liaison between EGFR and beta-adrenoceptors but also sheds new light on the purported therapeutic use of beta-adrenoceptor antagonists in the treatment of esophageal cancer.
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Affiliation(s)
- Xuan Liu
- Beijing Digestive Diseases Center and Beijing Friendship Hospital, Capital Medical University, Beijing, China
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Lu SM, Su M, Tian DP, Deng WD, Zheng YL, Huang HH, Chen MH, Li XY. Characterization of one newly established esophageal cancer cell line CSEC from a high-incidence area in China. Dis Esophagus 2008; 21:309-15. [PMID: 18477252 DOI: 10.1111/j.1442-2050.2007.00774.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The Chaoshan littoral is located in a high-incidence area of esophageal cancer in the south of China. In this study, a new esophageal cancer cell line CSEC was established from a 47-year-old female Chinese patient in this district. The biological characters of the cultured cells were investigated, including morphology, ultrastructure, growth kinetic features, tumorigenicity, expression of tumor-associated antigen and cytogenetic features. CSEC cell line grew continuously with a doubling time of 39.5 h and had been passaged over 80 times. The CSEC cells possessed features of squamous epithelial cells with cytokeratin indicated by immunohistochemical staining and tonofilaments and desmosomes revealed by electron microscopy. Tumorigenicity to severe combined immunodeficient mice was confirmed and the tumors developed revealed well-differentiated squamous cell carcinoma, similar to the origin tumor from which the cell line derived. The cytogenetic analysis demonstrated hypertetraploid karyotypes. Chromosome structure aberrations were common and complicated. Immunohistochemical staining showed that CSEC cells were infected with HPV and over-expressed p53. In summary, the CSEC cell line is a well-differentiated esophageal squamous cell carcinoma cell line from a high-incidence area in southern China. It may provide a useful model for the pathogenesis and therapeutic research of esophageal squamous cell carcinoma.
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Affiliation(s)
- S-M Lu
- Department of Pathology, Shantou University Medical College, Guangdong Province, China
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Cheung LCM, Tang JCO, Lee PY, Hu L, Guan XY, Tang WK, Srivastava G, Wong J, Luk JM, Law S. Establishment and characterization of a new xenograft-derived human esophageal squamous cell carcinoma cell line HKESC-4 of Chinese origin. ACTA ACUST UNITED AC 2007; 178:17-25. [PMID: 17889704 DOI: 10.1016/j.cancergencyto.2007.05.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2007] [Revised: 05/23/2007] [Accepted: 05/29/2007] [Indexed: 10/22/2022]
Abstract
A new human esophageal cancer cell line, HKESC-4, was established from a nude-mouse xenograft of a moderately differentiated esophageal squamous cell carcinoma (ESCC) developed from a 65-year-old Hong Kong Chinese man. The cellular characteristics (morphological, electron microscopic, and immunohistochemical studies), tumorigenicity in athymic nude mice, cytogenetic features, and DNA ploidy of the cell line were investigated. The cell line was maintained in vitro for 17 months and passaged 80 times. HKESC-4 grew as a monolayer, with a doubling time of 63 hours. The epithelial nature of HKESC-4 included the presence of cytokeratin intermediate filaments, as shown by antibodies (AE1/AF3, CAM5.2, and MAK 6), and the presence of the tonofilaments, as seen under electron microscopy. HKESC-4 was tumorigenic in nude mice and had DNA aneuploidy. The cytogenetic abnormalities of HKESC-4 included -1, -2, -3, -4, -5, -6, -7, -8, -9, -10, -11, -12, -15, -16, -17, -18, -19, +20, -21, -22, +del(11)(p11), +i(11)(q10), and +21 marker chromosomes. Comparative genomic hybridization analysis demonstrated chromosomal gains at 1p36.13, 3q23 approximately q28, 5p15.33 approximately p15.1, 6p25.1 approximately p22.3, 7p21.3 approximately p11.2, 7q11.21 approximately q21.13, 8q23.3 approximately q23.3, 11p11.2, 11q12.1 approximately q13.2, 14q21.3 approximately q32.2, 17p13.3, 18p11.32 approximately p11.31, and 20p13 approximately p12.2 and chromosomal losses at 1q12, 2p25.1 approximately p24.3, 13p13 approximately p11.2, 21p, 22p13 approximately p11.2, and Y. The newly established cell line HKESC-4 promises to be a useful tool in future studies of molecular pathogenesis and therapeutics in ESCC.
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Affiliation(s)
- Leo C M Cheung
- Department of Surgery, University of Hong Kong Medical Center, Queen Mary Hospital, Hong Kong SAR, China
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Hu Y, Williams VA, Gellersen O, Jones C, Watson TJ, Peters JH. The pathogenesis of Barrett's esophagus: secondary bile acids upregulate intestinal differentiation factor CDX2 expression in esophageal cells. J Gastrointest Surg 2007; 11:827-34. [PMID: 17458588 DOI: 10.1007/s11605-007-0174-3] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
INTRODUCTION Clinical evidence strongly suggests that bile acids are important in the development of Barrett's esophagus, although the mechanism remains unknown. Caudal-related homeobox 2 (CDX2) is a transcription factor recently implicated in early differentiation and maintenance of normal intestinal epithelium and is suggested to play a key role in the pathogenesis of intestinal metaplasia in Barrett's esophagus. OBJECTIVE The aim of this study was to investigate the effect of primary and secondary bile acids on CDX2 mRNA expression in human esophageal cells. METHODS Human esophageal cells: (1) squamous, immortalized by SV40 (Het-1A); (2) adenocarcinoma (SEG-1); and (3) squamous cell carcinoma (HKESC-1 & HKESC-2), were exposed in cell culture for 1-24 h to 100-1,000 microM deoxycholic, chenodeoxycholic, and glycocholic acids. Total RNA was extracted before and after bile acid treatment and reverse transcribed to cDNA. CDX2 mRNA expression was determined by both quantitative real-time and reverse transcription PCR (RT-PCR). RESULTS CDX2 mRNA expression was absent before bile acid exposure in all cell lines. CDX2 expression increased in a dose- and time-dependent fashion with deoxycholic and chenodeoxycholic, but not glycocholic, acid in all four cell lines. The maximal induction of CDX2 expression was seen in SEG-1 adenocarcinoma cells. Expression in Het-1A cells also increased significantly as did expression in HKESC-1,2 cells, although to a lesser extent than in adenocarcinoma. CONCLUSIONS These findings show that secondary bile acid stimulation upregulates CDX2 gene expression in both normal and cancer cell lines. They further support the role of bile acids in the pathogenesis of Barrett's esophagus and link the clinical evidence of a high prevalence of luminal bile acids in Barrett's to expression of the gene thought to be responsible for the phenotypic expression of intestinal metaplasia.
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Affiliation(s)
- Yingchuan Hu
- Department of Surgery, School of Medicine and Dentistry, University of Rochester, 601 Elmwood Ave, Rochester, New York 14642, USA
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Hui CM, Cheung PY, Ling MT, Tsao SW, Wang X, Wong YC, Cheung ALM. Id-1 promotes proliferation of p53-deficient esophageal cancer cells. Int J Cancer 2006; 119:508-14. [PMID: 16506209 DOI: 10.1002/ijc.21874] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The helix-loop-helix protein inhibitor of differentiation and DNA binding (Id-1) is known to promote cellular proliferation in several types of human cancer. Although it has been reported that Id-1 is over-expressed in esophageal squamous cell carcinoma (ESCC), its function and signaling pathways in esophageal cancer are unknown. In our study, we investigated the direct effects of Id-1 on esophageal cancer cell growth by transfecting an Id-1 expression vector into an ESCC cell line (HKESC-3), which showed serum-dependent Id-1 expression. Ectopic Id-1 expression resulted in increased serum-independent cell growth and G1-S phase transition, as well as up-regulation of mouse double minute 2 (MDM2) and down-regulation of p21Waf1/Cip1 protein expressions in the transfectant clones in a p53-independent manner. However, overexpression of Id-1 had no effect on the pRB, CDK4 and p16INK4A expressions. Stable transfection of Id-1 antisense expression vector to inhibit the expression of endogenous Id-1 in another ESCC cell line (HKESC-1) reversed the effects on MDM2 and p21Waf1/Cip1. In addition, Id-1 expression protected ESCC cells from Tumor Necrosis Factor (TNF)-alpha-induced apoptosis by up-regulating and activating Bcl-2. In conclusion, our study provides evidence for the first time that Id-1 plays a role in both proliferation and survival of esophageal cancer cells. Our findings also suggest that unlike prostate, hepatocellular and nasopharyngeal carcinomas in which Id-1 induces cell proliferation through inactivation of p16INK4A/RB pathway, the increased cell proliferation observed in ESCC cells may be mediated through a different mechanism.
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Affiliation(s)
- Cheuk Man Hui
- Cancer Biology Group, Department of Anatomy, Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, People's Republic of China
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N/A, 李 锋. N/A. Shijie Huaren Xiaohua Zazhi 2006; 14:1895-1899. [DOI: 10.11569/wcjd.v14.i19.1895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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Zhang H, Jin Y, Chen X, Jin C, Law S, Tsao SW, Kwong YL. Cytogenetic aberrations in immortalization of esophageal epithelial cells. ACTA ACUST UNITED AC 2006; 165:25-35. [PMID: 16490594 DOI: 10.1016/j.cancergencyto.2005.07.016] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2005] [Revised: 07/08/2005] [Accepted: 07/20/2005] [Indexed: 12/20/2022]
Abstract
To define the early cytogenetic events important in esophageal carcinogenesis, we immortalized normal esophageal epithelial cells by overexpression of human papillomavirus type 16 E6/E7 (HPV16E6/E7) and human telomerase reverse transcriptase (hTERT), and characterized the chromosomal abnormalities serially before and after cellular immortalizaiton. During crisis, most cells had simple nonclonal karyotypic changes with cytogenetic divergence. Mitotically unstable chromosomes (i.e., telomere association and dicentric chromosomes) were the most common aberrations. After crisis, the karyotypic patterns were more convergent with nonrandom clonal changes. A few clones dominated the culture. Gain of chromosome 20q was consistently observed in four HPVE6/E7 immortalized esophageal lines, whereas amplification of chromosome 5q was preferentially found in hTERT immortalized cells. In addition, chromosomal aberrations of immortalized cells, including del(3p) and centromere rearrangements, were similar to those observed in esophageal cancer. Furthermore, in E6/E7-expressing cells, the frequency of negative telomere termini and anaphase bridges were high during crisis and low after crisis. These findings suggested that telomere dysfunction might be an important cause of cellular crisis, and the resultant chromosomal aberrations, mainly amplification of chromosome 20q or 5q, might be early genetic events required in esophageal cell immortalization. These alterations might be valuable models for further study of molecular mechanisms contributing to esophageal carcinogenesis.
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Affiliation(s)
- Hao Zhang
- Department of Medicine, University of Hong Kong, Professorial Block, Pockfulam Road, Hong Kong, China
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Ren Y, Cao B, Law S, Xie Y, Lee PY, Cheung L, Chen Y, Huang X, Chan HM, Zhao P, Luk J, Vande Woude G, Wong J. Hepatocyte growth factor promotes cancer cell migration and angiogenic factors expression: a prognostic marker of human esophageal squamous cell carcinomas. Clin Cancer Res 2005; 11:6190-7. [PMID: 16144920 DOI: 10.1158/1078-0432.ccr-04-2553] [Citation(s) in RCA: 118] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
PURPOSE Hepatocyte growth factor/scatter factor (HGF/SF) and its receptor, c-Met, play important roles in tumor development and progression. In this study, we measured the serum HGF levels in patients with esophageal squamous cell carcinoma (ESCC) to evaluate its relationships with clinicopathologic features and the role of HGF in ESCC. EXPERIMENTAL DESIGN One hundred and forty-nine patients with ESCC were studied. Pretherapy serum was collected and ELISA was used to detect the concentrations of HGF, vascular endothelial growth factor (VEGF), and interleukin 8 (IL-8). The function of HGF was shown by invasion chamber assay. RESULTS Pretherapy serum HGF was found to be significantly higher in patients with ESCC than in control subjects. The levels of HGF correlated significantly with advanced tumor metastasis stage and survival. Multivariate analyses showed that serum HGF level in cell migration was an independent prognostic factor. Increased HGF serum levels correlated positively with serum levels of VEGF and IL-8. Our results also showed that HGF was overexpressed in ESCC tissues and cell lines. In vitro study showed that HGF could stimulate ESCC cell to express VEGF and IL-8 and markedly enhance invasion and migration of ESCC cells. Furthermore, HGF-induced IL-8 and VEGF expression was dependent on extracellular signal-regulated kinase signaling pathways. The inhibition of extracellular signal-regulated kinase activation reduced HGF-mediated IL-8 and VEGF expression. CONCLUSIONS Our results suggest that serum HGF may be a useful biomarker of tumor progression and a valuable independent prognostic factor in patients with ESCC. HGF may be involved in the progression of ESCC as an autocrine/paracrine factor via enhancing angiogenesis and tumor cell invasion and migration.
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Affiliation(s)
- Yi Ren
- Department of Surgery, University of Hong Kong Medical Centre, Queen Mary Hospital, Hong Kong, PR China.
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Ren Y, Law S, Huang X, Lee PY, Bacher M, Srivastava G, Wong J. Macrophage migration inhibitory factor stimulates angiogenic factor expression and correlates with differentiation and lymph node status in patients with esophageal squamous cell carcinoma. Ann Surg 2005; 242:55-63. [PMID: 15973102 PMCID: PMC1357705 DOI: 10.1097/01.sla.0000168555.97710.bb] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
OBJECTIVE The objectives of this study were: 1) to examine the expression of macrophage migration inhibitory factor (MIF) in esophageal squamous cell carcinoma (ESCC); 2) to see if a relationship exists between MIF expression, clinicopathologic features, and long-term prognosis; and 3) to ascertain the possible biologic function of MIF in angiogenesis. SUMMARY BACKGROUND DATA MIF has been linked to fundamental processes such as those controlling cell proliferation, cell survival, angiogenesis, and tumor progression. Its role in ESCC, and the correlation of MIF expression and tumor pathologic features in patients, has not been elucidated. METHODS The expression of MIF in tumor and nontumor tissues was examined by immunohistochemical staining. Concentrations of MIF, vascular endothelial growth factor (VEGF), and interleukin-8 (IL-8) in patients' sera and in the supernatant of tumor cells culture were examined by ELISA. Correlations with clinicopathologic factors were made. RESULTS In 72 patients with ESCC, intracellular MIF was overexpressed in esophagectomy specimens. The expression of MIF correlated with both tumor differentiation and lymph node status. The median survival in the low-MIF expression group (<50% positively stained cancer cells on immunohistochemistry) and high expression group (>/=50% positively stained cancer cells) was 28.3 months and 15.8 months, respectively (P = 0.03). The 3-year survival rates for the 2 groups were 37.7% and 12.1%, respectively. MIF expression was related to microvessel density; increased MIF serum levels also correlated with higher serum levels of VEGF. In addition, in vitro MIF stimulation of esophageal cancer cell lines induced a dose-dependent increase in VEGF and IL-8 secretion. CONCLUSIONS These results demonstrate, for the first time, that human esophageal carcinomas express and secrete large amounts of MIF. Through its effects on VEGF and IL-8, MIF may serve as an autocrine factor in angiogenesis and thus play an important role in the pathogenesis of ESCC.
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Affiliation(s)
- Yi Ren
- Department of Surgery, University of Hong Kong Medical Centre, Queen Mary Hospital, Hong Kong.
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Shiomi H, Sugihara H, Kamitani S, Tokugawa T, Tsubosa Y, Okada K, Tamura H, Tani T, Kodama M, Hattori T. Cytogenetic heterogeneity and progression of esophageal squamous cell carcinoma. ACTA ACUST UNITED AC 2003; 147:50-61. [PMID: 14580771 DOI: 10.1016/s0165-4608(03)00159-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
It is widely believed that most human tumors, including esophageal squamous cell carcinoma (ESCC), arise through multistep genetic and cytogenetic alterations. The time sequence of these alterations, however, is still unknown. The present study was designed to differentiate common early changes from uncommon later ones with combined comparative genomic hybridization (CGH) and ploidy analyses in multiple or single samples of 12 ESCCs. We first demonstrated that the mean copy numbers of chromosomes 3 and 11, determined directly by fluorescence in situ hybridization, showed linear correlation with the mean copy numbers calculated from the G/R ratio of CGH and DNA ploidy (R(2)=0.714, P<0.0001). On this basis, we estimated the absolute copy numbers of chromosomal parts by applying the ploidy-dependent threshold criteria to the G/R ratio data after the criteria were corrected by the percentage of tumor cells in each sample. One-copy changes in the DNA-diploid stage may give large shifts of the G/R ratio, even after tetraploidization, whereas those after tetraploidization undergo small shift. Using the tumors with multiple samples, it was actually demonstrated that most of the gains common to the samples in individual tumors showed the large shifts. Though early changes varied from tumor to tumor in the nine informative cases, it was found that gains of 3q (5/7: number of cases with large-shift 3q+/total number of cases with 3q+), 8q (3/4), 11q13 (4/5), and 14q (3/4) were early events, while losses of 3p (2/8), 5q (1/5), 13q (1/5), and 21q (1/5), and gains of 1p (1/4) and Xq (1/4) were later events in progression of individual tumors.
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Affiliation(s)
- Hisanori Shiomi
- First Department of Pathology, Shiga University of Medical Science, 520-2192, Ohtsu, Shiga, Japan.
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Hu YC, Lam KY, Law SY, Wan TSK, Ma ESK, Kwong YL, Chan LC, Wong J, Srivastava G. Establishment, characterization, karyotyping, and comparative genomic hybridization analysis of HKESC-2 and HKESC-3: two newly established human esophageal squamous cell carcinoma cell lines. CANCER GENETICS AND CYTOGENETICS 2002; 135:120-7. [PMID: 12127396 DOI: 10.1016/s0165-4608(01)00580-5] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The establishment of esophageal cancer cell lines can facilitate the search for molecular mechanisms underlying its pathogenesis. Two novel human esophageal squamous cell carcinoma (ESCC) cell lines, HKESC-2 and HKESC-3, were established from a moderately differentiated ESCC of a 46-year-old Chinese woman and a well-differentiated ESCC of a 74-year-old Chinese man, both from Hong Kong. The pathological characteristics (morphological, immunohistochemical, and electron microscopic studies), tumorigenicity in nude mice, cytogenetic features, and DNA ploidy of the two cell lines were investigated. The two cell lines have been maintained in vitro for more than 17 months and passaged over 85 times for HKESC-2 and 58 times for HKESC-3. Both grew as monolayers, with a doubling time of 24 hours for HKESC-2 and 48 h for HKESC-3. Their squamous epithelial nature was authenticated by their strong immunopositivity with the anti-cytokeratin antibodies and the ultrastructural demonstration of tonofilaments and desmosomes. They are tumorigenic in nude mice and had DNA aneuploidy. G-banding cytogenetic analysis showed hyperdiploidy in HKESC-2 and near-tetraploidy in HKESC-3. Frequent breakpoints were noted at 1p22, 1p32, and 9q34 in HKESC-2 and at 1p31, 3p25, 3p14, 6q16, 6q21, 8p21, 9q34, 13q32, and 17q25 in HKESC-3. Comparative genomic hybridization analysis found that chromosomal gains were at 3q24-qter, 5q21-qter, 8q11-qter, 13q21-q31, 17q11-qter, 19, 22q22 for HKESC-2 and at 3q13-qter, 5p, 6p, 9q21-qter, 10q21-q22, 12q15-pter, 14q24-qter, 16, 17q24-qter, 20 for HKESC-3. Chromosomal losses were at 3p13-pter, 18q12-qter for HKESC-3. These two newly established cell lines will be useful tools in the study of the molecular pathogenesis and biological behavior of ESCC cells and for testing new therapeutic reagents for ESCC in the future.
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Affiliation(s)
- Ying Chuan Hu
- Department of Pathology, The University of Hong Kong, Hong Kong, China
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Guttenbach M, Steinlein C, Engel W, Schmid M. Cytogenetic characterization of the TM4 mouse Sertoli cell line. I. Conventional banding techniques, FISH and SKY. CYTOGENETICS AND CELL GENETICS 2002; 94:71-8. [PMID: 11701958 DOI: 10.1159/000048786] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Permanent Sertoli cell lines provide an ideal system for the in vitro analysis of function and responsiveness to biochemical/hormonal factors of this particular cell type. In general, cytogenetic analyses of cell lines often reveal remarkable chromosomal changes that may be associated with functional characteristics. In the present study we investigated the mouse Sertoli cell line TM4 by C-banding, silver staining, FISH and spectral karyotyping (SKY). A highly increased chromosome number (average 85-95) as well as five stable marker chromosomes were detected by the conventional staining techniques. SKY identified the markers as a translocation chromosome T(1;3), isochromosomes 11 and 18 and two different-sized microchromosomes. The results show the usefulness of combining SKY and conventional banding methods for the evaluation of chromosome alterations in widely used cell lines.
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Affiliation(s)
- M Guttenbach
- Department of Human Genetics, University of Würzburg, Würzburg, Germany
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Si HX, Tsao SW, Lam KY, Srivastava G, Liu Y, Wong YC, Shen ZY, Cheung AL. E-cadherin expression is commonly downregulated by CpG island hypermethylation in esophageal carcinoma cells. Cancer Lett 2001; 173:71-8. [PMID: 11578811 DOI: 10.1016/s0304-3835(01)00646-2] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
E-cadherin, a cell adhesion molecule, is regarded as an invasion-suppressor molecule and a prognostic marker in many types of human cancers. Downregulation of E-cadherin is common in esophageal carcinoma and is associated with an increase in invasive and metastatic potential. To study the mechanisms responsible for inactivation of this gene in esophageal squamous cell carcinoma (ESCC), we investigated the methylation status around the 5' promoter region of E-cadherin gene of six ESCC cell lines by methylation-specific polymerase chain reaction, and compared it with E-cadherin protein and mRNA expression. We also studied the methylation status of 20 ESCC clinical specimens. Methylation was noted in four of the six cell lines (one fully methylated and three partially methylated). The completely methylated cell line lacked E-cadherin protein expression and mRNA transcription. E-cadherin expression and transcription were reduced in a partially methylated cell line but preserved in the other partially methylated cell lines. Treatment of E-cadherin-negative carcinoma cells with the demethylating agent, 5-aza-2'-deoxycytidine, induced re-expression of the gene. A high frequency of methylation (16/20, 80%) was also noted in the 20 ESCC clinical samples. Our results indicate that 5' CpG island methylation is common in esophageal carcinoma and may play an important role in downregulation of E-cadherin.
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Affiliation(s)
- H X Si
- Department of Anatomy, The University of HongKong, Li Shu Fan Building, 5 Sassoon Road, Hong Kong SAR, PR China
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Lam KY, Law S, Luk JM, Wong J. Oesophageal basaloid squamous cell carcinoma: a unique clinicopathological entity with telomerase activity as a prognostic indicator. J Pathol 2001; 195:435-42. [PMID: 11745675 DOI: 10.1002/path.984] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Oesophageal basaloid squamous cell carcinoma (BSCC) is uncommon and has been reported to have a worse prognosis than squamous cell carcinomas (SCCs), but this tumour has not been fully characterized. The aim of the present study was to analyse the clinicopathological features of a large cohort of patients with oesophageal BSCC treated at a single institution. The pathology of 756 primary oesophageal cancers treated between January 1989 and December 1998 was reviewed. Tumours that fulfilled the diagnostic criteria of BSCC were identified and were compared with SCC. Their expression of MIB-1, DNA ploidy, and telomerase activity were also studied. Thirty Chinese patients (25 men and five women) with BSCC were found, comprising 4% of patients with oesophageal cancer treated by surgical resection in the study period. Their median age was 67 years (range 40-78 years). Dysphagia was usually the main presenting symptom. Other concomitant malignant tumours were seen in three patients and paraneoplastic glomerulopathy in one. Five tumours were located in the upper third, 19 in the middle third, and six in the lower third. The median length was 5.8 cm (range 2-12 cm). The median MIB-1 score of BSCC was 750 (range 400-858) and was higher than that of SCC (p=0.003). The primary tumour and metastatic BSCC were aneuploid, as detected by flow cytometric analysis in nine patients. Telomerase activity was positive in 95% (19 out of 20) of the cases analysed. The 5-year survival of patients with BSCC was 12%. Distant metastases were seen in 53% (n=16); lung and liver were the most common sites. The median survival of patients with tumours which had a high level of telomerase activity was significantly shorter than those with low levels of telomerase activity (1 vs. 27 months) (p=0.001). The median survival of patients with BSCC and SCC was 26 and 16 months, respectively (p=0.3). In conclusion, BSCC has distinctive clinicopathological features and its long-term prognosis is no worse than SCC. The level of telomerase activity may have a prognostic role.
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Affiliation(s)
- K Y Lam
- Department of Pathology, University of Hong Kong Medical Centre, Queen Mary Hospital, Hong Kong.
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Tang JC, Wan TS, Wong N, Pang E, Lam KY, Law SY, Chow LM, Ma ES, Chan LC, Wong J, Srivastava G. Establishment and characterization of a new xenograft-derived human esophageal squamous cell carcinoma cell line SLMT-1 of Chinese origin. CANCER GENETICS AND CYTOGENETICS 2001; 124:36-41. [PMID: 11165320 DOI: 10.1016/s0165-4608(00)00317-4] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new human esophageal cancer cell line, named SLMT-1, was established from a nude-mouse xenograft of a well-differentiated esophageal squamous cell carcinoma (ESCC) of the lower esophagus from a male Hong Kong Chinese patient. SLMT-1, passaged over 34 times and with a doubling time of 31 hours, has the microscopic features of epithelial cells with adherent growth as a monolayer. The general biologic properties of SLMT-1 cells were characterized by (1) a positive test of tumorigenicity obtained by injecting cells subcutaneously into athymic nude mice and observing their development into well-differentiated squamous cell carcinoma; (2) immunohistochemical staining using antibodies (AE1/AE3, CAM5.2 and MAK 6) which show the presence of cytokeratin intermediate filaments; and (3) electron microscopy demonstrating the morphologic features of epithelial cells with the presence of desmosomes. The cytogenetic abnormalities found in both the primary culture and SLMT-1 included der(1;14)(q10;q10), add(1)(p1?), +1, +2, del(3)(q11), +6, +7, i(8)(q10), +8, +10, +11, -13, -15, +16, +17, -18, -19, -Y and marker chromosomes. Additional changes observed in the 34th passage included gains as well as losses of both numerical and structural abnormalities. Comparative genomic hybridization (CGH) indicated copy number gains on chromosomal regions 3q32-qter, 5p, 8p12-p11.2, 11q13-q22 and 13q22-qter, and loss of the Y. The gains of 8p12-p11.2 in SLMT-1 cells are novel to ESCC. Based on its distinct and common characteristics, the SLMT-1 cell line serves as a useful tool for studying the molecular and genetic basis of the pathogenesis of ESCC.
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Affiliation(s)
- J C Tang
- Department of Pathology, The University of Hong Kong, Hong Kong, China
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