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Dabous E, Alalem M, Awad AM, Elawdan KA, Tabl AM, Elsaka S, Said W, Guirgis AA, Khalil H. Regulation of KLRC and Ceacam gene expression by miR-141 supports cell proliferation and metastasis in cervical cancer cells. BMC Cancer 2024; 24:1091. [PMID: 39227808 PMCID: PMC11370040 DOI: 10.1186/s12885-024-12794-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 08/12/2024] [Indexed: 09/05/2024] Open
Abstract
INTRODUCTION MicroRNAs (miRNAs) are single RNA molecules that act as global regulators of gene expression in mammalian cells and thus constitute attractive targets in treating cancer. Here we aimed to investigate the possible involvement of miRNA-141 (miR-141) in cervical cancer and to identify its potential targets in cervical cancer cell lines. METHODS The level of miR-141 in HeLa and C-33A cells has been assessed using the quantitative real-time PCR (qRT-PCR). A new miR-141 construct has been performed in a CMV promoter vector tagged with GFP. Using microarray analysis, we identified the potentially regulated genes by miR-141 in transfected HeLa cells. The protein profile of killer-like receptor C1 (KLRC1), KLRC3, carcinoembryonic antigen-related cell adhesion molecule 3 (CAM3), and CAM6 was investigated in HeLa cells transfected with either an inhibitor, antagonist miR-141, or miR-141 overexpression vector using immunoblotting and flow cytometry assay. Finally, ELISA assay has been used to monitor the produced cytokines from transfected HeLa cells. RESULTS The expression of miR-141 significantly increased in HeLa and C-33A cells compared to the normal cervical HCK1T cell line. Transfection of HeLa cells with an inhibitor, antagonist miR-141, showed a potent effect on cancer cell viability, unlike the transfection of miR-141 overexpression vector. The microarray data of HeLa cells overexpressed miR-141 provided a hundred of downregulated genes, including KLRC1, KLRC3, CAM3, and CAM6. KLRC1 and KLRC3 expression profiles markedly depleted in HeLa cells transfected with miR-141 overexpression accompanied by decreasing interleukin 8 (IL-8), indicating the role of miR-141 in avoiding programmed cells death in HeLa cells. Likewise, CAM3 and CAM6 expression reduced markedly in miR-141 transduced cells accompanied by an increasing level of transforming growth factor beta (TGF-β), indicating the impact of miR-141 in cancer cell migration. The IntaRNA program and miRWalk were used to check the direct interaction and potential binding sites between miR-141 and identified genes. Based on this, the seeding regions of each potential target was cloned upstream of the luciferase reporter gene in the pGL3 control vector. Interestingly, the luciferase activities of constructed vectors were significantly decreased in HeLa cells pre-transfected with miR-141 overexpression vector, while increasing enormously in cells pre-transfected with miR-141 specific inhibitor. CONCLUSION Together, these data uncover an efficient miR-141-based mechanism that supports cervical cancer progression and identifies miR-141 as a credible therapeutic target.
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Affiliation(s)
- Emad Dabous
- Department of Molecular Biology, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, P.O Box 79, Sadat City, Egypt
| | - Mai Alalem
- Department of Molecular Biology, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, P.O Box 79, Sadat City, Egypt
| | - Ahmed M Awad
- Department of Molecular Biology, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, P.O Box 79, Sadat City, Egypt
| | - Khaled A Elawdan
- Department of Molecular Biology, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, P.O Box 79, Sadat City, Egypt
| | - Ahmed M Tabl
- Department of Molecular Biology, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, P.O Box 79, Sadat City, Egypt
| | - Shorouk Elsaka
- Department of Molecular Biology, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, P.O Box 79, Sadat City, Egypt
| | - Walid Said
- Microbiology and Chemistry Department, Faculty of Science, Benha University, Benha, Egypt
| | - Adel A Guirgis
- Department of Molecular Biology, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, P.O Box 79, Sadat City, Egypt
| | - Hany Khalil
- Department of Molecular Biology, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, P.O Box 79, Sadat City, Egypt.
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Ma Y, Zhou X. Accurate and efficient integrative reference-informed spatial domain detection for spatial transcriptomics. Nat Methods 2024; 21:1231-1244. [PMID: 38844627 DOI: 10.1038/s41592-024-02284-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 04/18/2024] [Indexed: 06/23/2024]
Abstract
Spatially resolved transcriptomics (SRT) studies are becoming increasingly common and large, offering unprecedented opportunities in mapping complex tissue structures and functions. Here we present integrative and reference-informed tissue segmentation (IRIS), a computational method designed to characterize tissue spatial organization in SRT studies through accurately and efficiently detecting spatial domains. IRIS uniquely leverages single-cell RNA sequencing data for reference-informed detection of biologically interpretable spatial domains, integrating multiple SRT slices while explicitly considering correlations both within and across slices. We demonstrate the advantages of IRIS through in-depth analysis of six SRT datasets encompassing diverse technologies, tissues, species and resolutions. In these applications, IRIS achieves substantial accuracy gains (39-1,083%) and speed improvements (4.6-666.0) in moderate-sized datasets, while representing the only method applicable for large datasets including Stereo-seq and 10x Xenium. As a result, IRIS reveals intricate brain structures, uncovers tumor microenvironment heterogeneity and detects structural changes in diabetes-affected testis, all with exceptional speed and accuracy.
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Affiliation(s)
- Ying Ma
- Department of Biostatistics, Brown University, Providence, RI, USA
- Center for Computational Molecular Biology, Brown University, Providence, RI, USA
| | - Xiang Zhou
- Department of Biostatistics, University of Michigan, Ann Arbor, MI, USA.
- Center for Statistical Genetics, University of Michigan, Ann Arbor, MI, USA.
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Zhao D, Cai F, Liu X, Li T, Zhao E, Wang X, Zheng Z. CEACAM6 expression and function in tumor biology: a comprehensive review. Discov Oncol 2024; 15:186. [PMID: 38796667 PMCID: PMC11127906 DOI: 10.1007/s12672-024-01053-6] [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] [Received: 01/10/2024] [Accepted: 05/22/2024] [Indexed: 05/28/2024] Open
Abstract
Carcinoembryonic antigen-related cell adhesion molecule 6 (CEACAM6) is an immunoglobulin superfamily protein primarily expressed on epithelial surfaces and myeloid cells. It plays a significant role in cancer progression by inhibiting apoptosis, promoting drug resistance, and facilitating cancer cell invasion and metastasis. Overexpression of CEACAM6 has been observed in various cancers, including lung, breast, colorectal, and hepatocellular cancers, and is associated with poorer overall survival and disease-free survival. Its differential expression on tumor cell surfaces makes it a promising cancer marker. This review aims to provide a comprehensive summary of CEACAM6's role in different cancer types, its involvement in signaling pathways, and recent advancements in CEACAM6-targeted treatments.
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Affiliation(s)
- Dong Zhao
- Department of Oncology, General Hospital of Northern Theater Command, Shenyang, China
| | - Fei Cai
- Department of Oncology, General Hospital of Northern Theater Command, Shenyang, China
- China Medical University, Shenyang, China
| | - Xuefei Liu
- Department of Oncology, General Hospital of Northern Theater Command, Shenyang, China
| | - Tingting Li
- Department of Oncology, General Hospital of Northern Theater Command, Shenyang, China
| | - Ershu Zhao
- Department of Oncology, General Hospital of Northern Theater Command, Shenyang, China
| | - Xinlong Wang
- Department of Oncology, General Hospital of Northern Theater Command, Shenyang, China
| | - Zhendong Zheng
- Department of Oncology, General Hospital of Northern Theater Command, Shenyang, China.
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Luo Y, Zhang Z, Ren J, Dou C, Wen J, Yang Y, Li X, Yan Z, Han Y. SARS-Cov-2 spike induces intestinal barrier dysfunction through the interaction between CEACAM5 and Galectin-9. Front Immunol 2024; 15:1303356. [PMID: 38686388 PMCID: PMC11056506 DOI: 10.3389/fimmu.2024.1303356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 03/28/2024] [Indexed: 05/02/2024] Open
Abstract
Background Carcinoembryonic antigen-related cell adhesion molecule 5 (CEACAM5), as a typical tumor marker, has been found to exert immunomodulatory effects in many diseases. We previously reported the clinical and molecular evidences supporting that SARS-Cov-2 infected the gastrointestinal (GI) tract and found a reduction of CEACAM5 in COVID-19 patients' feces which associated with gut dysbiosis. Yet the role of CEACAM5 in GI infection is ill-defined. Methods Mice models were established through intraperitoneally injecting with recombinant viral spike-Fc to mimic the intestinal inflammation. We collected duodenum, jejunum, ileum and colon samples after 6h, 2 days, 4 days and 7 days of spike-Fc or control-Fc injection to perform proteomic analysis. Blood was collected from healthy donors and peripheral blood mononuclear cells (PBMC) were separated by density gradient centrifugation, then CD4+ T cells were isolated with magnetic beads and co-cultured with Caco-2 cells. Results In addition to intestinal CEACAM5, the expression of tight junction and the percent of CD4+ T lymphocytes were significantly decreased in spike-Fc group compared to control (p < 0.05), accompanied with increased level of inflammatory factors. The KEGG analysis revealed differentially expressed proteins were mainly enriched in the coronavirus disease (COVID-19), tight junction, focal adhesion, adherens junction and PI3K-Akt signaling pathway. Protein-protein interaction (PPI) network analysis identified the interaction between CEACAM5 and Galectin-9 that was also verified by molecular docking and co-IP assay. We further confirmed a reduction of CEACAM5 in SARS-CoV-2 spike stimulated enterocytes could promote the expression of Galectin-9 protein in CD4+T cells. Then it gave rise to the increasing release of inflammatory factors and increased apoptosis of CD4+T cells by inhibition of PI3K/AKT/mTOR pathway. Ultimately intestinal barrier dysfunction happened. Conclusion Our results indicated that CEACAM5 overexpression and Galectin-9 knockdown played a protective role in intestinal barrier injury upon spike-Fc stimulation. Collectively, our findings identified firstly that SARS-CoV-2 spike induced intestinal barrier dysfunction through the interaction between CEACAM5 and Galectin-9. The result provides potential therapeutic targets in intestinal barrier dysfunction for treating severe COVID patients.
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Affiliation(s)
- Yingshu Luo
- Department of Gastroenterology, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong, China
| | - Zhenling Zhang
- Department of Gastroenterology, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong, China
| | - Jiangnan Ren
- Department of Gastroenterology, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong, China
| | - Chunxu Dou
- Department of Gastroenterology, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong, China
| | - Jiancheng Wen
- Department of Gastroenterology, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong, China
| | - Yang Yang
- Department of Gastroenterology, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong, China
| | - Xiaofeng Li
- Department of Gastroenterology, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong, China
| | - Zhixiang Yan
- Guangdong Provincial Key Laboratory of Biomedical Imaging and Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong, China
| | - Yanzhi Han
- Department of Gastroenterology, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong, China
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Cardenas KCA, Enos CW, Spear MR, Austin DE, Almofeez R, Kortchak S, Pincus L, Guo HB, Dolezal S, Pierce JM, Furth E, Gineste C, Kwon Y, Gelber C. CT109-SN-38, a Novel Antibody-drug Conjugate with Dual Specificity for CEACAM5 and 6, Elicits Potent Killing of Pancreatic Cancer Cells. Curr Cancer Drug Targets 2024; 24:720-732. [PMID: 38178674 DOI: 10.2174/0115680096260614231115192343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 08/18/2023] [Accepted: 10/03/2023] [Indexed: 01/06/2024]
Abstract
BACKGROUND CEACAM5 and CEACAM6 are glycosylphosphatidylinositol (GPI)- linked members of the carcinoembryonic antigen-related cell adhesion molecule (CEACAM) family, which are frequently upregulated in epithelial cancers where they contribute to invasion, metastasis, immune evasion, and resistance to anoikis. CT109 is a novel antibody with dual specificity to both CEACAM5 and 6. OBJECTIVES In this study, we aimed to perform the preclinical characterization of CT109 and antibody- drug conjugate (ADCs) derivatives of CT109, focusing on CT109-SN-38. METHODS CT109's cognate epitope was characterized by scanning mutagenesis. CT109 specificity and internalization kinetics were assessed by immunoblot and flow cytometry, respectively. Cognate antigen expression prevalence in colorectal cancer and normal tissue arrays was determined by immunohistochemistry. CT109 conjugations were generated by the reaction of reduced CT109 cysteines with maleimide-functionalized payload linkers. In vitro cytotoxic activity of CT109 ADCs was characterized on antigen-positive and negative pancreatic ductal adenocarcinoma cell (PDAC) lines using a luminometric viability assay. In vivo efficacy of CT109-SN-38 was assessed on a PDAC tumor xenograft model at 10 and 25 mg/kg concentrations. RESULTS CT109 was shown to bind a glycoepitope centered on N309. CT109 is internalized in the CEACAM5+/CEACAM6+ double-positive PDAC line, BxPC-3, with a t1/2 of 2.3 hours. CT109 ADCs elicit a dose and antigen-dependent cytotoxic effect, with CT109-SN-38 exhibiting an IC50 value of 21 nM in BxPC-3 cells. In a BxPC-3 tumor xenograft model, CT109-SN-38 reduced tumor growth and induced regression in 3/10 mice at a concentration 25 mg/kg. CONCLUSION These data suggest that further preclinical and clinical development of CT109-SN-38 is warranted.
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Affiliation(s)
| | | | - Mark R Spear
- Stromatis Pharma, 9501 Discovery Blvd Manassas, VA 20109, USA
| | - Dana E Austin
- Stromatis Pharma, 9501 Discovery Blvd Manassas, VA 20109, USA
| | - Raghad Almofeez
- Stromatis Pharma, 9501 Discovery Blvd Manassas, VA 20109, USA
| | | | - Lauren Pincus
- Stromatis Pharma, 9501 Discovery Blvd Manassas, VA 20109, USA
| | - Hua-Bei Guo
- University of Georgia Cancer Center, Department of Biochemistry and Molecular Biology and the Complex Carbohydrate Research Center (CCRC), USA
| | - Samuel Dolezal
- University of Georgia Cancer Center, Department of Biochemistry and Molecular Biology and the Complex Carbohydrate Research Center (CCRC), USA
| | - J Michael Pierce
- University of Georgia Cancer Center, Department of Biochemistry and Molecular Biology and the Complex Carbohydrate Research Center (CCRC), USA
| | - Emma Furth
- Perelman School of Medicine at the University of Pennsylvania, Philadelphia, USA
| | | | - Yongjun Kwon
- Institute: Food and Drug Administration, CDER, MD, USA
| | - Cohava Gelber
- Stromatis Pharma, 9501 Discovery Blvd Manassas, VA 20109, USA
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Li G, Zhou Z, Wang Z, Wang Z. Assessing Epstein-Barr virus in gastric cancer: clinicopathological features and prognostic implications. Infect Agent Cancer 2023; 18:11. [PMID: 36803802 PMCID: PMC9938970 DOI: 10.1186/s13027-023-00489-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 02/14/2023] [Indexed: 02/21/2023] Open
Abstract
BACKGROUND Epstein-Barr virus (EBV)-associated gastric cancer (EBVaGC) was a unique molecular subtype of gastric cancer (GC). However, the clinicopathological characteristics and prognostic role of EBV infection remains unclear. We aimed to evaluate the clinicopathological features of EBVaGC and its role on prognosis. METHODS EBV-encoded RNA (EBER) in situ hybridization method was used to evaluate the EBV status in GC. The serum tumor markers AFP, CEA, CA19-9 and CA125 of patients were detected before treatment. HER2 expression and microsatellite instability (MSI) status was evaluated according to established criteria. The relationship between EBV infection and clinicopathological factors as well as its role on prognosis were investigated. RESULTS 420 patients were enrolled in the study and of 53 patients (12.62%) were identified as EBVaGC. EBVaGC was more common in males (p = 0.001) and related to early T stage (p = 0.045), early TNM stage (p = 0.001) and lower level of serum CEA (p = 0.039). No association could be found between EBV infection and HER2 expression, MSI status and other factors (p all > 0.05). Kaplan-Meier analysis revealed that both the overall survival and disease-free survival of EBVaGC patients were similar to that of EBV-negative GC (EBVnGC) patients (p = 0.309 and p = 0.264, respectively). CONCLUSION EBVaGC was more common in males and in patients with the early T stage and TNM stage as well as patients with lower serum CEA level. Difference in overall survival and disease-free survival between EBVaGC and EBVnGC patients cannot be detected.
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Affiliation(s)
- Guanghua Li
- grid.412615.50000 0004 1803 6239Department of Gastrointestinal Surgery, First Affiliated Hospital of Sun Yat-Sen University, Zhongshan 2nd Street, No. 58, Guangzhou, 510080 Guangdong China
| | - Zhihao Zhou
- grid.412615.50000 0004 1803 6239Department of Gastrointestinal Surgery, First Affiliated Hospital of Sun Yat-Sen University, Zhongshan 2nd Street, No. 58, Guangzhou, 510080 Guangdong China
| | - Zhixiong Wang
- grid.412615.50000 0004 1803 6239Department of Gastrointestinal Surgery, First Affiliated Hospital of Sun Yat-Sen University, Zhongshan 2nd Street, No. 58, Guangzhou, 510080 Guangdong China
| | - Zhao Wang
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Sun Yat-Sen University, Zhongshan 2nd Street, No. 58, Guangzhou, 510080, Guangdong, China.
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CEACAMS 1, 5, and 6 in disease and cancer: interactions with pathogens. Genes Cancer 2023; 14:12-29. [PMID: 36741860 PMCID: PMC9891707 DOI: 10.18632/genesandcancer.230] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 01/20/2023] [Indexed: 02/04/2023] Open
Abstract
The CEA family comprises 18 genes and 11 pseudogenes located at chromosome 19q13.2 and is divided into two main groups: cell surface anchored CEA-related cell adhesion molecules (CEACAMs) and the secreted pregnancy-specific glycoproteins (PSGs). CEACAMs are highly glycosylated cell surface anchored, intracellular, and intercellular signaling molecules with diverse functions, from cell differentiation and transformation to modulating immune responses associated with infection, inflammation, and cancer. In this review, we explore current knowledge surrounding CEACAM1, CEACAM5, and CEACAM6, highlight their pathological significance in the areas of cancer biology, immunology, and inflammatory disease, and describe the utility of murine models in exploring questions related to these proteins.
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Zhang J, Yin X, Wang H, Fang T, Gao J, Zhu Z, Li C, Wang Y, Wang X, Lu Z, Wu J, Wang Y, Zhang Y, Xue Y. Development and Validation of Tumor Marker Indices in Advanced Gastric Cancer Patients. Cancer Control 2023; 30:10732748231202466. [PMID: 37728233 PMCID: PMC10515535 DOI: 10.1177/10732748231202466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023] Open
Abstract
BACKGROUND Tumor markers (TMs) are important for the prognosis of gastric cancer (GC). However, the prognostic importance of the tumor marker index (TMI) based on GC-specific TMs for advanced gastric cancer (AGC) still needs to be further explored. METHODS We retrospectively examined patients who underwent radical gastric cancer surgery between February 2014 and June 2016 at the Department of Gastroenterological Surgery, Affiliated Cancer Hospital, Harbin Medical University. The patients were divided into training and validation groups. TMI was determined as the geometric mean of the standard cancer antigen 19-9 (CA19-9) and carcinoembryonic antigen (CEA) levels. Patient overall survival was assessed using the Kaplan-Meier method. Independent prognosis-associated risk factors were identified using Cox hazard regression models. A nomogram model incorporating TMI and clinicopathological factors was developed, and its performance was evaluated using a decision curve analysis, concordance index, and calibration plots. RESULTS In the TMI training cohort, the cutoff value was set at .439, categorizing patients into TMI-High and TMI-Low groups. The 5-year survival rate in the TMI-Low group significantly surpassed that in the TMI-High group (78.2% vs 58.1% and 49.7 vs 41.6, P < .001). TMI emerged as an independent prognostic factor. The nomogram accurately predicted patient prognosis by using TMI and clinicopathological characteristics. Validation of the TMI in the independent cohort yielded satisfactory results. CONCLUSION The TMI constructed based on specific TMs associated with gastric cancer can offer a precise prognostic prediction for patients.
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Affiliation(s)
- Jiaqi Zhang
- Department of Gastroenterological Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Xin Yin
- Department of Gastroenterological Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Hao Wang
- Department of Gastroenterological Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Tianyi Fang
- Department of Gastroenterological Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Jialiang Gao
- Department of Gastroenterological Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Ziyu Zhu
- Department of Gastroenterological Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Chunfeng Li
- Department of Gastroenterological Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Yufei Wang
- Department of Gastroenterological Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Xibo Wang
- Department of Gastroenterological Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Zhanfei Lu
- Department of Gastroenterological Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Junpeng Wu
- Department of Gastroenterological Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Yimin Wang
- Department of Gastroenterological Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Yao Zhang
- Department of Gastroenterological Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Yingwei Xue
- Department of Gastroenterological Surgery, Harbin Medical University Cancer Hospital, Harbin, China
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Yangyanqiu W, Shuwen H. Bacterial DNA involvement in carcinogenesis. Front Cell Infect Microbiol 2022; 12:996778. [PMID: 36310856 PMCID: PMC9600336 DOI: 10.3389/fcimb.2022.996778] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 09/27/2022] [Indexed: 10/29/2023] Open
Abstract
The incidence of cancer is high worldwide, and biological factors such as viruses and bacteria play an important role in the occurrence of cancer. Helicobacter pylori, human papillomavirus, hepatitis B viruses and other organisms have been identified as carcinogens. Cancer is a disease driven by the accumulation of genome changes. Viruses can directly cause cancer by changing the genetic composition of the human body, such as cervical cancer caused by human papillomavirus DNA integration and liver cancer caused by hepatitis B virus DNA integration. Recently, bacterial DNA has been found around cancers such as pancreatic cancer, breast cancer and colorectal cancer, and the idea that bacterial genes can also be integrated into the human genome has become a hot topic. In the present paper, we reviewed the latest phenomenon and specific integration mechanism of bacterial DNA into the human genome. Based on these findings, we also suggest three sources of bacterial DNA in cancers: bacterial DNA around human tissues, free bacterial DNA in bacteremia or sepsis, and endogenous bacterial DNA in the human genome. Clarifying the theory that bacterial DNA integrates into the human genome can provide a new perspective for cancer prevention and treatment.
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Affiliation(s)
- Wang Yangyanqiu
- Huzhou Central Hospital, Affiliated Central Hospital Huzhou University, Huzhou, China
- Graduate School of Medical college of Zhejiang University, Hangzhou, China
- Key Laboratory of Multiomics Research and Clinical Transformation of Digestive Cancer, Huzhou, China
| | - Han Shuwen
- Huzhou Central Hospital, Affiliated Central Hospital Huzhou University, Huzhou, China
- Graduate School of Medical college of Zhejiang University, Hangzhou, China
- Key Laboratory of Multiomics Research and Clinical Transformation of Digestive Cancer, Huzhou, China
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Gene profiling of SEC13, SMAD7, GHRL, long non-coding RNA GHRLOS, HIF-1α in gastric cancer patients. Sci Rep 2022; 12:6555. [PMID: 35449150 PMCID: PMC9023477 DOI: 10.1038/s41598-022-10402-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 03/29/2022] [Indexed: 11/08/2022] Open
Abstract
Even with considerable progress in cancer researches, gastric cancer is still one of the global health problems. Recognition of the differential expressed genes in GC is the most appropriate approach for establishing new diagnostic targets. This study evaluates SEC13, SMAD7, GHRL, lncRNA GHRLOS, HIF-1α genes profiling as well as HIF-1α protein level for GC. The expression of selected genes, serum HIF-1α and CEA protein levels were determined for 50 GC patients and 50 healthy controls by real-time RT-PCR, ELISA, and ELICA respectively. The sensitivities of these parameters as diagnostic biomarkers were evaluated. SMAD7, HIF-1α expression, serum HIF-1α, and CEA level were significantly upregulated in GC patients as compared to the control group (P = 0.024, < 0.001) and had significant positive correlations between each other except SMAD7 with serum HIF-1α, and CEA level. On the other hand, SEC13, GHRL, and lncRNA GHRLOS expression were significantly downregulated in GC patients (P = < 0.001, 0.025, < 0.001 respectively) and had significant positive correlations with each other (P < 0.001). Significant negative correlations were observed between most of both groups. All studied parameters were associated with GC clinical stages except SMAD7 was associated with stage IV only (P = 0.005) and GHRL did not associate with tumor stages (P ˃ 0.05). All studied parameters may be promising biomarkers for the early diagnosis of GC. SMAD7, HIF-1α gene, and HIF-1α protein may be jointly implicated in cancer development and prognosis, while SEC13, GHRL, and lncRNA GHRLOS may act as tumor suppressors.
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Mohajershojai T, Jha P, Boström A, Frejd FY, Yazaki PJ, Nestor M. In Vitro Characterization of 177Lu-DOTA-M5A Anti-Carcinoembryonic Antigen Humanized Antibody and HSP90 Inhibition for Potentiated Radioimmunotherapy of Colorectal Cancer. Front Oncol 2022; 12:849338. [PMID: 35433442 PMCID: PMC9010075 DOI: 10.3389/fonc.2022.849338] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 02/22/2022] [Indexed: 11/13/2022] Open
Abstract
Carcinoembryonic antigen (CEA) is an antigen that is highly expressed in colorectal cancers and widely used as a tumor marker. 131I and 90Y-radiolabeled anti-CEA monoclonal antibodies (mAbs) have previously been assessed for radioimmunotherapy in early clinical trials with promising results. Moreover, the heat shock protein 90 inhibitor onalespib has previously demonstrated radiotherapy potentiation effects in vivo. In the present study, a 177Lu-radiolabeled anti-CEA hT84.66-M5A mAb (M5A) conjugate was developed and the potential therapeutic effects of 177Lu-DOTA-M5A and/or onalespib were investigated. The 177Lu radiolabeling of M5A was first optimized and characterized. Binding specificity and affinity of the conjugate were then evaluated in a panel of gastrointestinal cancer cell lines. The effects on spheroid growth and cell viability, as well as molecular effects from treatments, were then assessed in several three-dimensional (3D) multicellular colorectal cancer spheroid models. Stable and reproducible radiolabeling was obtained, with labeling yields above 92%, and stability was retained at least 48 h post-radiolabeling. Antigen-specific binding of the radiolabeled conjugate was demonstrated on all CEA-positive cell lines. Dose-dependent therapeutic effects of both 177Lu-DOTA-M5A and onalespib were demonstrated in the spheroid models. Moreover, effects were potentiated in several dose combinations, where spheroid sizes and viabilities were significantly decreased compared to the corresponding monotherapies. For example, the combination treatment with 350 nM onalespib and 20 kBq 177Lu-DOTA-M5A resulted in 2.5 and 2.3 times smaller spheroids at the experimental endpoint than the corresponding monotreatments in the SNU1544 spheroid model. Synergistic effects were demonstrated in several of the more effective combinations. Molecular assessments validated the therapy results and displayed increased apoptosis in several combination treatments. In conclusion, the combination therapy of anti-CEA 177Lu-DOTA-M5A and onalespib showed enhanced therapeutic effects over the individual monotherapies for the potential treatment of colorectal cancer. Further in vitro and in vivo studies are warranted to confirm the current study findings.
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Affiliation(s)
| | - Preeti Jha
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden.,Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden
| | | | - Fredrik Y Frejd
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Paul J Yazaki
- Department of Immunology and Theranostics, Beckman Research Institute, City of Hope, Duarte, CA, United States
| | - Marika Nestor
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
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12
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Ma Y, Lin J, Lin J, Hou J, Xiao Q, Yu F, Ma Z, Li P, Tu R, Xie J, Zheng C, Yan S, Huang C. A novel prognosis marker based on combined preoperative carcinoembryonic antigen and systemic inflammatory response for resectable gastric cancer. J Cancer 2021; 12:927-935. [PMID: 33403049 PMCID: PMC7778548 DOI: 10.7150/jca.52299] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Accepted: 11/12/2020] [Indexed: 12/13/2022] Open
Abstract
Background: Carcinoembryonic antigen (CEA) is one of the important indexes for the diagnosis and prognosis of gastrointestinal cancer. Systemic inflammatory response (SIR) is closely related to the occurrence and development of gastrointestinal cancer. Methods: A total of 803 patients who underwent radical gastrectomy in Qinghai University Affiliated Hospital from January 2012 to December 2016 were included as training set. Multivariable Cox proportional hazard regression was used to identify associations with outcome of gastric cancer (GC). CNLR was established by combining CEA and the neutrophils to lymphocytes ratio (NLR, a typical parameter in SIR) to generate a novel prognostic score system and its prognostic value was externally validated. Results: Multivariate analysis showed that CEA and NLR were independent prognostic factors for GC patients (both p < 0.05). A higher CNLR was significantly associated with older age, male sex, larger tumor size, vascular invasion and advanced stages (all p < 0.05). Patients with higher CNLR had poor prognosis than those with lower CNLR (p < 0.05). Multivariate analysis showed that CNLR was an independent prognostic factor (p < 0.05). Incorporation of the CNLR into a prognostic model including age and TNM stage generated a nomogram, which predicted accurately 3- and 5-year survival for GC patients. And similar results were obtained in the external validation set. Conclusions: The CNLR prognostic scoring system established by combining CEA and NLR is an independent prognostic factor for GC, which can be incorporated into the traditional TNM staging to improve the prediction of long-term survival outcomes.
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Affiliation(s)
- Yubin Ma
- Department of Gastrointestinal Oncology, Qinghai University Affiliated Hospital, Xining, People's Republic of China
| | - Junpeng Lin
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, People's Republic of China
| | - Jianxian Lin
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, People's Republic of China
| | - Junfang Hou
- Department of Gastrointestinal Oncology, Qinghai University Affiliated Hospital, Xining, People's Republic of China
| | - Qin Xiao
- Department of Gastrointestinal Oncology, Qinghai University Affiliated Hospital, Xining, People's Republic of China
| | - Fang Yu
- Department of Gastrointestinal Oncology, Qinghai University Affiliated Hospital, Xining, People's Republic of China
| | - Zhijun Ma
- Department of Gastrointestinal Oncology, Qinghai University Affiliated Hospital, Xining, People's Republic of China
| | - Ping Li
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, People's Republic of China
| | - Ruhong Tu
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, People's Republic of China
| | - Jianwei Xie
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, People's Republic of China
| | - Chaohui Zheng
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, People's Republic of China
| | - Su Yan
- Department of Gastrointestinal Oncology, Qinghai University Affiliated Hospital, Xining, People's Republic of China
| | - Changming Huang
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, People's Republic of China
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13
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DeLucia DC, Cardillo TM, Ang L, Labrecque MP, Zhang A, Hopkins JE, De Sarkar N, Coleman I, da Costa RMG, Corey E, True LD, Haffner MC, Schweizer MT, Morrissey C, Nelson PS, Lee JK. Regulation of CEACAM5 and Therapeutic Efficacy of an Anti-CEACAM5-SN38 Antibody-drug Conjugate in Neuroendocrine Prostate Cancer. Clin Cancer Res 2020; 27:759-774. [PMID: 33199493 DOI: 10.1158/1078-0432.ccr-20-3396] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 10/30/2020] [Accepted: 11/09/2020] [Indexed: 11/16/2022]
Abstract
PURPOSE Neuroendocrine prostate cancer (NEPC) is an aggressive form of castration-resistant prostate cancer (CRPC) for which effective therapies are lacking. We previously identified carcinoembryonic antigen-related cell adhesion molecule 5 (CEACAM5) as a promising NEPC cell surface antigen. Here we investigated the scope of CEACAM5 expression in end-stage prostate cancer, the basis for CEACAM5 enrichment in NEPC, and the therapeutic potential of the CEACAM5 antibody-drug conjugate labetuzumab govitecan in prostate cancer. EXPERIMENTAL DESIGN The expression of CEACAM5 and other clinically relevant antigens was characterized by multiplex immunofluorescence of a tissue microarray comprising metastatic tumors from 34 lethal metastatic CRPC (mCRPC) cases. A genetically defined neuroendocrine transdifferentiation assay of prostate cancer was developed to evaluate mechanisms of CEACAM5 regulation in NEPC. The specificity and efficacy of labetuzumab govitecan was determined in CEACAM5+ prostate cancer cell lines and patient-derived xenografts models. RESULTS CEACAM5 expression was enriched in NEPC compared with other mCRPC subtypes and minimally overlapped with prostate-specific membrane antigen, prostate stem cell antigen, and trophoblast cell surface antigen 2 expression. We focused on a correlation between the expression of the pioneer transcription factor ASCL1 and CEACAM5 to determine that ASCL1 can drive neuroendocrine reprogramming of prostate cancer which is associated with increased chromatin accessibility of the CEACAM5 core promoter and CEACAM5 expression. Labetuzumab govitecan induced DNA damage in CEACAM5+ prostate cancer cell lines and marked antitumor responses in CEACAM5+ CRPC xenograft models including chemotherapy-resistant NEPC. CONCLUSIONS Our findings provide insights into the scope and regulation of CEACAM5 expression in prostate cancer and strong support for clinical studies of labetuzumab govitecan for NEPC.
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Affiliation(s)
- Diana C DeLucia
- Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | | | - Lisa Ang
- Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Mark P Labrecque
- Department of Urology, University of Washington School of Medicine, Seattle, Washington
| | - Ailin Zhang
- Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - James E Hopkins
- Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Navonil De Sarkar
- Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Ilsa Coleman
- Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Rui M Gil da Costa
- Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, Washington.,Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Eva Corey
- Department of Urology, University of Washington School of Medicine, Seattle, Washington
| | - Lawrence D True
- Department of Laboratory Medicine and Pathology, University of Washington School of Medicine, Seattle, Washington
| | - Michael C Haffner
- Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, Washington.,Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington.,Department of Laboratory Medicine and Pathology, University of Washington School of Medicine, Seattle, Washington
| | - Michael T Schweizer
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington.,Department of Medicine, University of Washington School of Medicine, Seattle, Washington
| | - Colm Morrissey
- Department of Urology, University of Washington School of Medicine, Seattle, Washington
| | - Peter S Nelson
- Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, Washington.,Department of Urology, University of Washington School of Medicine, Seattle, Washington.,Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington.,Department of Laboratory Medicine and Pathology, University of Washington School of Medicine, Seattle, Washington.,Department of Medicine, University of Washington School of Medicine, Seattle, Washington
| | - John K Lee
- Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, Washington. .,Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington.,Department of Laboratory Medicine and Pathology, University of Washington School of Medicine, Seattle, Washington.,Department of Medicine, University of Washington School of Medicine, Seattle, Washington
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14
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Zi-yang Y, Kaixun Z, Dongling L, Zhou Y, Chengbin Z, Jimei C, Caojin Z. Carcinoembryonic antigen levels are increased with pulmonary output in pulmonary hypertension due to congenital heart disease. J Int Med Res 2020; 48:300060520964378. [PMID: 33203284 PMCID: PMC7683927 DOI: 10.1177/0300060520964378] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 09/10/2020] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVE Pulmonary artery hypertension (PAH) is a severe complication of congenital heart disease (CHD). Monitoring of pulmonary arterial pressure (PAP) and pulmonary vascular resistance (PVR) is essential during follow-up. This retrospective study aimed to examine carcinoembryonic antigen (CEA) as an additional marker for evaluation by investigating the correlation between CEA levels and hemodynamics in CHD-PAH. METHODS Seventy-six patients with CHD-PAH (mean PAP [mPAP] >25 mmHg and PVR >3 Wood units, group A), 71 patients with CHD and pulmonary hypertension (CHD-PH, mPAP >25 mmHg and PVR ≤3 Wood units, group B), and 102 patients with CHD without PH (mPAP ≤25 mmHg, group C) were enrolled. Serum CEA levels and the relationships between CEA levels and hemodynamic data were assessed. RESULTS Mean serum CEA levels were 1.99±1.61, 2.44±1.82, and 1.58±1.07 ng/mL, mPAP was 58.66±20.21, 30.2±4.83, and 17.31±4.51 mmHg, and PVR was 10.12±7.01, 2.19±0.56, and 2.2±1.1 Wood units in groups A, B, and C, respectively. Mean pulmonary output (PO) was 7.24±3.07, 15.79±5.49, 10.18±4.72 L/minute, respectively. CEA levels were positively correlated with PO and negatively correlated with PVR in all of the patients. CONCLUSION CEA levels are increased with PO and decreased with PVR in CHD-PH.
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Affiliation(s)
- Yang Zi-yang
- Southern Medical University, The Second School of Clinical Medicine, Guangzhou, China
- Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- Guangdong Cardiovascular Institute, Guangzhou, China
- Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangzhou, China
| | - Zhao Kaixun
- Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- Guangdong Cardiovascular Institute, Guangzhou, China
- Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangzhou, China
- Shantou University Medical College, Shantou, China
| | - Luo Dongling
- Guangdong General Hospital’s Nanhai Hospital, Foshan, China
| | - Yin Zhou
- Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- Guangdong Cardiovascular Institute, Guangzhou, China
- Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangzhou, China
- South China University of echnology School of Medicine, Guangzhou, China
| | - Zhou Chengbin
- Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- Guangdong Cardiovascular Institute, Guangzhou, China
- Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangzhou, China
| | - Chen Jimei
- Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- Guangdong Cardiovascular Institute, Guangzhou, China
- Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangzhou, China
| | - Zhang Caojin
- Southern Medical University, The Second School of Clinical Medicine, Guangzhou, China
- Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- Guangdong Cardiovascular Institute, Guangzhou, China
- Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangzhou, China
- Zhang Caojin, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, No. 106 Zhong Shan Er Road, Yue Xiu District, Guangzhou, Guangdong 510080, China.
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15
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Zhang X, Han X, Zuo P, Zhang X, Xu H. CEACAM5 stimulates the progression of non-small-cell lung cancer by promoting cell proliferation and migration. J Int Med Res 2020; 48:300060520959478. [PMID: 32993395 PMCID: PMC7536504 DOI: 10.1177/0300060520959478] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Objective To detect the expression of CEA-related cell adhesion molecule 5 (CEACAM5) in
non-small-cell lung cancer (NSCLC) and explore its function in the
progression and development of NSCLC. Methods qRT-PCR and immunohistochemistry were performed to detect CEACAM5 expression
in human NSCLC tissues and cell lines. The correlation between CEACAM5
expression and the clinicopathological features of patients with NSCLC was
also investigated. MTT, colony formation, wound healing, and immunoblot
assays were performed to detect the functions of CEACAM5 in NSCLC cells
in vitro, and immunoblotting was used to detect the
effects of CEACAM5 on p38–Smad2/3 signaling. Results CEACAM5 expression was elevated in human NSCLC tissues and cells. We further
found that CEACAM expression was correlated with clinicopathological
features including T division, lymph invasion, and histological grade in
patients with NSCLC. The in vitro assays confirmed that
CEACAM5 depletion inhibited the proliferation and migration of NSCLC cells
by activating p38–Smad2/3 signaling. We verified the involvement of CEACAM5
in the suppression of NSCLC tumor growth in mice. Conclusion CEACAM5 stimulated the progression of NSCLC by promoting cell proliferation
and migration in vitro and in vivo.
CEACAM5 may serve as a potential therapeutic target for the treatment of
NSCLC.
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Affiliation(s)
- Xinwen Zhang
- Department of General Practice, Linyi Central Hospital, Linyi, China
| | - Xingbao Han
- Department of Urology, Linyi Central Hospital, Linyi, China
| | - Pengli Zuo
- Central Laboratory, Linyi Central Hospital, Linyi, China
| | - Xiuying Zhang
- Department of Clinical Lab, Linyi Central Hospital, Linyi, China
| | - Hongbang Xu
- Department of Respiratory Medicine, Linyi Central Hospital, Linyi, China
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16
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Gulati P, Mishra P, Khanuja M, Narang J, Islam S. Nano-moles detection of tumor specific biomarker DNA for colorectal cancer detection using vertically aligned multi-wall carbon nanotubes based flexible electrodes. Process Biochem 2020. [DOI: 10.1016/j.procbio.2019.11.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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17
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Sakharov D, Maltseva D, Knyazev E, Nikulin S, Poloznikov A, Shilin S, Baranova A, Tsypina I, Tonevitsky A. Towards embedding Caco-2 model of gut interface in a microfluidic device to enable multi-organ models for systems biology. BMC SYSTEMS BIOLOGY 2019; 13:19. [PMID: 30836980 PMCID: PMC6399809 DOI: 10.1186/s12918-019-0686-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Background A cancer cell line originating from human epithelial colorectal adenocarcinoma (Caco-2 cells) serves as a high capacity model for a preclinical screening of drugs. Recent need for incorporating barrier tissue into multi-organ chips calls for inclusion of Caco-2 cells into microperfused environment. Results This article describes a series of systems biology insights obtained from comparing Caco-2 models cells grown as conventional 2D layer and in a microfluidic chip. When basic electrical parameters of Caco-2 monolayers were evaluated using impedance spectrometry and MTT assays, no differences were noted. On the other hand, the microarray profiling of mRNAs and miRNAs revealed that grows on a microfluidic chip leads to the change in the production of specific miRNA, which regulate a set of genes for cell adhesion molecules (CAMs), and provide for more complete differentiation of Caco-2 monolayer. Moreover, the sets of miRNAs secreted at the apical surface of Caco-2 monolayers grown in conventional 2D culture and in microfluidic device differ. Conclusions When integrated into a multi-tissue platform, Caco-2 cells may aid in generating insights into complex pathophysiological processes, not possible to dissect in conventional cultures.
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Affiliation(s)
| | | | | | | | | | | | - Ancha Baranova
- School of Systems Biology, George Mason University, Fairfax VA, USA.,Research Center of Medical Genetics, Moscow, Russia
| | - Irina Tsypina
- SRC BioClinicum, Moscow, Russia.,Department of Cell Biology, Higher School of Economics, Moscow, Russia
| | - Alexander Tonevitsky
- SRC BioClinicum, Moscow, Russia.,Department of Cell Biology, Higher School of Economics, Moscow, Russia.,Art photonics GmbH, Berlin, Germany
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18
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Saxena P, Pradhan D, Verma R, Kumar SN, Deval R, Kumar Jain A. Up-regulation of fibroblast growth factor receptor 1 due to prenatal tobacco exposure can lead to developmental defects in new born. J Matern Fetal Neonatal Med 2018; 33:1732-1743. [PMID: 30428736 DOI: 10.1080/14767058.2018.1529164] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Introduction: Tobacco-smoking is one of the most important risk factor for preterm delivery, pregnancy loss, low birth weight, and fetal growth restriction. It is estimated that approximately 30% of growth-restricted neonates could be independently associated with maternal smoking.Methods: In this study, gene expression profile, GSE11798, was chosen from GEO database with an aim to perceive change in gene expression signature in new born due to maternal smoking. Enrichment analysis was performed to annotate differentially expressed genes (DEGs) through gene ontology and pathway analysis using DAVID. Protein-protein interactions and module detection of these DEGs were carried out using cytoscape v3.6.0. Thirty umbilical cord tissue samples from 15 smokers and 15 non-smokers pregnant women were included in this analysis.Results: Twenty-six differentially expressed genes (DEGs) between two groups were selected using GEO2R tool. The DEGs were observed to be participating in biological processes/pathways related to growth releasing hormone, angiogenesis, embryonic skeletal, and cardiac development. Fibroblast growth factor receptor-1 (FGFR1) was identified to be the hub node with 348 interacting partners, which regulates transcription, cell growth, differentiation, and apoptosis. The up-regulation of FGFR1 in umbilical cord tissue may lead to reproductive and developmental complications such as encephalocraniocutaneous lipomatosis, osteoglophonic dysplasia, and Pfeiffer syndrome in new-borns.Conclusion: The findings manifests the possibility of overcoming these adverse health effects in new born through FGFR1 modulating treatments during pregnancy.
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Affiliation(s)
- Pallavi Saxena
- Department of Biotechnology, Invertis University, Bareilly, India.,Biomedical Informatics Centre, Indian Council of Medical Research, National Institute of Pathology, New Delhi, India
| | - Dibyabhaba Pradhan
- Biomedical Informatics Centre, Indian Council of Medical Research, National Institute of Pathology, New Delhi, India
| | - Rashi Verma
- Biomedical Informatics Centre, Indian Council of Medical Research, National Institute of Pathology, New Delhi, India
| | - Shashi Nandar Kumar
- Biomedical Informatics Centre, Indian Council of Medical Research, National Institute of Pathology, New Delhi, India
| | - Ravi Deval
- Department of Biotechnology, Invertis University, Bareilly, India
| | - Arun Kumar Jain
- Biomedical Informatics Centre, Indian Council of Medical Research, National Institute of Pathology, New Delhi, India
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19
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Du Z, Li L, Sun W, Wang X, Zhang Y, Chen Z, Yuan M, Quan Z, Liu N, Hao Y, Li T, Wang J, Luo C, Wu X. HepaCAM inhibits the malignant behavior of castration-resistant prostate cancer cells by downregulating Notch signaling and PF-3084014 (a γ-secretase inhibitor) partly reverses the resistance of refractory prostate cancer to docetaxel and enzalutamide in vitro. Int J Oncol 2018; 53:99-112. [PMID: 29658567 PMCID: PMC5958706 DOI: 10.3892/ijo.2018.4370] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 04/04/2018] [Indexed: 01/25/2023] Open
Abstract
Castration-resistant prostate cancer (CRPC) continues to be a major challenge in the treatment of prostate cancer (PCa). The expression of hepatocyte cell adhesion molecule (HepaCAM), a novel tumor suppressor, is frequently downregulated or lost in PCa. Overactivated Notch signaling is involved in the development and progression of PCa, including CRPC. In this study, we found that the activities of Notch signaling were elevated, while HepaCAM expression was decreased in CRPC tissues compared with matched primary prostate cancer (PPC) tissues. In addition, HepaCAM negativity was found to be associated with a worse progression-free survival (PFS). Furthermore, the overexpression of HepaCAM induced by transfection with a HepaCAM overexpression vector (Ad-HepaCAM) exerted antitumor effects by decreasing the proliferation, and suppressing the invasion and migration of bicalutamide-resistant (Bica-R) cells and enzalutamide-resistant (Enza-R) cells. Importantly, we found that the antitumor effects of HepaCAM on the resistant cells were associated with the downregulation of Notch signaling. Moreover, we revealed that PF-3084014 (a γ-secretase inhibitor) re-sensitized Enza-R cells to enzalutamide, and sequential dual-resistant (E+D-R) cells to docetaxel. Additionally, the findings of this study demonstrated that the use of PF-3084014 alone exerted potent antitumor effect on the resistant cells in vitro. On the whole, this study indicates that HepaCAM potentially represents a therapeutic target and PF-3084014 may prove to a promising agent for use in the treatment of refractory PCa.
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Affiliation(s)
- Zhongbo Du
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Luo Li
- Key Laboratory of Laboratory Medical Diagnostics, Ministry of Education, Department of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Wei Sun
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Xiao Wang
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Yao Zhang
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Zhixiong Chen
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Mengjuan Yuan
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Zhen Quan
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Nanjing Liu
- Key Laboratory of Laboratory Medical Diagnostics, Ministry of Education, Department of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Yanni Hao
- Key Laboratory of Laboratory Medical Diagnostics, Ministry of Education, Department of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Ting Li
- Key Laboratory of Laboratory Medical Diagnostics, Ministry of Education, Department of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Jinhua Wang
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Chunli Luo
- Key Laboratory of Laboratory Medical Diagnostics, Ministry of Education, Department of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Xiaohou Wu
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
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20
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Zang M, Hu L, Cao S, Fan Z, Pang L, Li J, Su L, Li C, Liu W, Gu Q, Zhu Z, Yan M, Liu B. Dual role of carcinoembryonic antigen-related cell adhesion molecule 6 expression in predicting the overall survival of gastric cancer patients. Sci Rep 2017; 7:10773. [PMID: 28883649 PMCID: PMC5589957 DOI: 10.1038/s41598-017-11482-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 08/25/2017] [Indexed: 12/21/2022] Open
Abstract
Carcinoembryonic antigen-related cell adhesion molecule 6 (CEACAM6) is a member of the glycosylphosphatidylinositol-linked immunoglobulin superfamily that is implicated in many human cancers. Here, we aimed to investigate the role of CEACAM6 expression in predicting the overall survival (OS) in gastric cancer (GC). The impact of CEACAM6 on the survival of patients with GC (n = 876) was assessed using an online Kaplan-Meier plotter. Findings were validated using the OS data of patients (n = 160) recruited from Ruijin Hospital. We found that high CEACAM6 expression was associated with a better OS in early-stage or well-differentiated GC, or who were treated without 5-fluorouracil (5-FU). Conversely, high CEACAM6 expression was associated with a poor OS in advanced-stage GC, poorly differentiated tumors, or who were treated with 5-FU. Furthermore, CEACAM6 may serve as a better marker for predicting OS in GC than CEA. In addition, CEACAM6 overexpression in GC cells increased apoptotic resistance to 5-FU. Moreover, CEACAM6 induced cluster of differentiation 4- and 8-positive lymphocytes were detected in early-stage GC. In conclusion, CEACAM6 plays a contradictory role in predicting the OS in GC. In early-stage GC, high CEACAM6 expression is associated with improved OS. However, in advanced-stage GC, high CEACAM6 expression is associated with a poor OS.
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Affiliation(s)
- Mingde Zang
- Department of General Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Lei Hu
- Department of General Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Shu Cao
- Department of General Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Zhiyuan Fan
- Department of General Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Li Pang
- Department of General Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Jianfang Li
- Department of General Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Liping Su
- Department of General Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Chen Li
- Department of General Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Wentao Liu
- Department of General Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Qinlong Gu
- Department of General Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Zhenggang Zhu
- Department of General Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Min Yan
- Department of General Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Bingya Liu
- Department of General Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China.
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miRNA-mediated expression switch of cell adhesion genes driven by microcirculation in chip. BIOCHIP JOURNAL 2017. [DOI: 10.1007/s13206-017-1305-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Kim EJ, Kang JI, Tung NH, Kim YH, Hyun JW, Koh YS, Chang WY, Yoo ES, Kang HK. The Effect of (1S,2S,3E,7E,11E)-3,7,11,15-Cembratetraen-17,2-Olide (LS-1) from Lobophyyum sp. on the Apoptosis Induction of SNU-C5 Human Colorectal Cancer Cells. Biomol Ther (Seoul) 2016; 24:623-629. [PMID: 27469141 PMCID: PMC5098542 DOI: 10.4062/biomolther.2016.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 05/04/2016] [Accepted: 05/12/2016] [Indexed: 01/07/2023] Open
Abstract
(1S,2S,3E,7E,11E)-3,7,11,15-cembratetraen-17,2-olide (LS-1), a marine cembrenolide diterpene, has anticancer activity against colon cancer cells such as HT-29, SNU-C5/5-FU (fluorouracil-resistant SNU-C5) and SNU-C5. However, the action mechanism of LS-1 on SNU-C5 human colon cancer cells has not been fully elucidated. In this study, we investigated whether the anticancer effect of LS-1 could result from apoptosis via the modulation of Wnt/β-catenin and the TGF-β pathways. When treated with the LS-1, we could observe the apoptotic characteristics such as apoptotic bodies and the increase of sub-G1 hypodiploid cell population, increase of Bax level, decrease of Bcl-2 expression, cleavage of procaspase-3 and cleavage of poly (ADP-ribose) polymerase in SNU-C5 cells. Furthermore, the apoptosis induction of SNU-C5 cells upon LS-1 treatment was also accompanied by the down-regulation of Wnt/β-catenin signaling pathway via the decrease of GSK-3β phosphorylation followed by the decrease of β-catenin level. In addition, the LS-1 induced the activation of TGF-β signaling pathway with the decrease of carcinoembryonic antigen which leads to decrease of c-Myc, an oncoprotein. These data suggest that the LS-1 could induce the apoptosis via the down-regulation of Wnt/β-catenin pathway and the activation of TGF-β pathway in SNU-C5 human colon cancer cells. The results support that the LS-1 might have potential for the treatment of human colon cancer.
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Affiliation(s)
- Eun-Ji Kim
- School of Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Jung Il Kang
- School of Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Nguyen-Huu Tung
- College of Pharmacy, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Young-Ho Kim
- College of Pharmacy, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Jin Won Hyun
- School of Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Young Sang Koh
- School of Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Weon-Young Chang
- School of Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Eun Sook Yoo
- School of Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Hee-Kyoung Kang
- School of Medicine, Jeju National University, Jeju 63243, Republic of Korea
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Carcinoembryonic Antigen-Related Cell Adhesion Molecule 5 Is an Important Surface Attachment Factor That Facilitates Entry of Middle East Respiratory Syndrome Coronavirus. J Virol 2016; 90:9114-27. [PMID: 27489282 DOI: 10.1128/jvi.01133-16] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 07/23/2016] [Indexed: 12/16/2022] Open
Abstract
UNLABELLED The spike proteins of coronaviruses are capable of binding to a wide range of cellular targets, which contributes to the broad species tropism of coronaviruses. Previous reports have demonstrated that Middle East respiratory syndrome coronavirus (MERS-CoV) predominantly utilizes dipeptidyl peptidase 4 (DPP4) for cell entry. However, additional cellular binding targets of the MERS-CoV spike protein that may augment MERS-CoV infection have not been further explored. In the current study, using the virus overlay protein binding assay (VOPBA), we identified carcinoembryonic antigen-related cell adhesion molecule 5 (CEACAM5) as a novel cell surface binding target of MERS-CoV. CEACAM5 coimmunoprecipitated with the spike protein of MERS-CoV in both overexpressed and endogenous settings. Disrupting the interaction between CEACAM5 and MERS-CoV spike with anti-CEACAM5 antibody, recombinant CEACAM5 protein, or small interfering RNA (siRNA) knockdown of CEACAM5 significantly inhibited the entry of MERS-CoV. Recombinant expression of CEACAM5 did not render nonpermissive baby hamster kidney (BHK21) cells susceptible to MERS-CoV infection. Instead, CEACAM5 overexpression significantly enhanced the attachment of MERS-CoV to the BHK21 cells. More importantly, the entry of MERS-CoV was increased when CEACAM5 was overexpressed in permissive cells, which suggested that CEACAM5 could facilitate MERS-CoV entry in conjunction with DPP4 despite not being able to support MERS-CoV entry independently. Taken together, the results of our study identified CEACAM5 as a novel cell surface binding target of MERS-CoV that facilitates MERS-CoV infection by augmenting the attachment of the virus to the host cell surface. IMPORTANCE Infection with the Middle East respiratory syndrome coronavirus (MERS-CoV) is associated with the highest mortality rate among all known human-pathogenic coronaviruses. Currently, there are no approved vaccines or therapeutics against MERS-CoV infection. The identification of carcinoembryonic antigen-related cell adhesion molecule 5 (CEACAM5) as a novel cell surface binding target of MERS-CoV advanced our knowledge on the cell binding biology of MERS-CoV. Importantly, CEACAM5 could potentiate the entry of MERS-CoV by functioning as an attachment factor. In this regard, CEACAM5 could serve as a novel target, in addition to dipeptidyl peptidase-4 (DPP4), in the development of antiviral strategies for MERS-CoV.
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Fittipaldi S, Vasuri F, Degiovanni A, Pini R, Gargiulo M, Stella A, Pasquinelli G, Thilly WG, Gostjeva EV. The study of calcified atherosclerotic arteries: an alternative to evaluate the composition of a problematic tissue reveals new insight including metakaryotic cells. BMC Clin Pathol 2016; 16:12. [PMID: 27478409 PMCID: PMC4966787 DOI: 10.1186/s12907-016-0036-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 07/20/2016] [Indexed: 02/06/2023] Open
Abstract
Background Calcifications of atherosclerotic plaques represent a controversial issue as they either lead to the stabilization or rupture of the lesion. However, the cellular key players involved in the progression of the calcified plaques have not yet been described. The primary reason for this lacuna is that decalcification procedures impair protein and nucleic acids contained in the calcified tissue. The aim of our study was to preserve the cellular content of heavily calcified plaques with a new rapid fixation in order to simplify the study of calcifications. Methods Here we applied a fixation method for fresh calcified tissue using the Carnoy’s solution followed by an enzymatic tissue digestion with type II collagenase. Immunohistochemistry was performed to verify the preservation of nuclear and cytoplasmic antigens. DNA content and RNA preservation was evaluated respectively with Feulgen staining and RT-PCR. A checklist of steps for successful image analysis was provided. To present the basic features of the F-DNA analysis we used descriptive statistics, skewness and kurtosis. Differences in DNA content were analysed with Kruskal-Wallis and Dunn’s post tests. The value of P < 0.05 was considered significant. Results Twenty-four vascular adult tissues, sorted as calcified (14) or uncalcified (10), were processed and 17 fetal tissues were used as controls (9 soft and 8 hard). Cells composing the calcified carotid plaques were positive to Desmin, Vimentin, Osteocalcin or Ki-67; the cellular population included smooth muscle cells, osteoblasts and osteoclasts-like cells and metakaryotic cells. The DNA content of each cell type found in the calcified carotid artery was successfully quantified in 7 selected samples. Notably the protocol revealed that DNA content in osteoblasts in fetal control tissues exhibits about half (3.0 ng) of the normal nuclear DNA content (6.0 ng). Conclusion Together with standard histology, this technique could give additional information on the cellular content of calcified plaques and help clarify the calcification process during atherosclerosis. Electronic supplementary material The online version of this article (doi:10.1186/s12907-016-0036-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Silvia Fittipaldi
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES); S. Orsola-Malpighi Hospital, Bologna University, Via Massarenti 9, I 40139 Bologna, Italy ; Laboratory in Metakaryotic Biology (LIMB), Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA USA
| | - Francesco Vasuri
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES); S. Orsola-Malpighi Hospital, Bologna University, Via Massarenti 9, I 40139 Bologna, Italy
| | - Alessio Degiovanni
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES); S. Orsola-Malpighi Hospital, Bologna University, Via Massarenti 9, I 40139 Bologna, Italy
| | - Rodolfo Pini
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES); S. Orsola-Malpighi Hospital, Bologna University, Via Massarenti 9, I 40139 Bologna, Italy
| | - Mauro Gargiulo
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES); S. Orsola-Malpighi Hospital, Bologna University, Via Massarenti 9, I 40139 Bologna, Italy
| | - Andrea Stella
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES); S. Orsola-Malpighi Hospital, Bologna University, Via Massarenti 9, I 40139 Bologna, Italy
| | - Gianandrea Pasquinelli
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES); S. Orsola-Malpighi Hospital, Bologna University, Via Massarenti 9, I 40139 Bologna, Italy
| | - William G Thilly
- Laboratory in Metakaryotic Biology (LIMB), Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA USA
| | - Elena V Gostjeva
- Laboratory in Metakaryotic Biology (LIMB), Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA USA
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Pathogenesis of progressive scarring trachoma in Ethiopia and Tanzania and its implications for disease control: two cohort studies. PLoS Negl Trop Dis 2015; 9:e0003763. [PMID: 25970613 PMCID: PMC4430253 DOI: 10.1371/journal.pntd.0003763] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Accepted: 04/15/2015] [Indexed: 11/19/2022] Open
Abstract
Background Trachoma causes blindness through a conjunctival scarring process initiated by ocular Chlamydia trachomatis infection; however, the rates, drivers and pathophysiological determinants are poorly understood. We investigated progressive scarring and its relationship to conjunctival infection, inflammation and transcript levels of cytokines and fibrogenic factors. Methodology/Principal Findings We recruited two cohorts, one each in Ethiopia and Tanzania, of individuals with established trachomatous conjunctival scarring. They were followed six-monthly for two years, with clinical examinations and conjunctival swab sample collection. Progressive scarring cases were identified by comparing baseline and two-year photographs, and compared to individuals without progression. Samples were tested for C. trachomatis by PCR and transcript levels of S100A7, IL1B, IL13, IL17A, CXCL5, CTGF, SPARCL1, CEACAM5, MMP7, MMP9 and CD83 were estimated by quantitative RT-PCR. Progressive scarring was found in 135/585 (23.1%) of Ethiopian participants and 173/577 (30.0%) of Tanzanian participants. There was a strong relationship between progressive scarring and increasing inflammatory episodes (Ethiopia: OR 5.93, 95%CI 3.31–10.6, p<0.0001. Tanzania: OR 5.76, 95%CI 2.60–12.7, p<0.0001). No episodes of C. trachomatis infection were detected in the Ethiopian cohort and only 5 episodes in the Tanzanian cohort. Clinical inflammation, but not scarring progression, was associated with increased expression of S100A7, IL1B, IL17A, CXCL5, CTGF, CEACAM5, MMP7, CD83 and reduced SPARCL1. Conclusions/Significance Scarring progressed in the absence of detectable C. trachomatis, which raises uncertainty about the primary drivers of late-stage trachoma. Chronic conjunctival inflammation appears to be central and is associated with enriched expression of pro-inflammatory factors and altered expression of extracellular matrix regulators. Host determinants of scarring progression appear more complex and subtle than the features of inflammation. Overall this indicates a potential role for anti-inflammatory interventions to interrupt progression and the need for trichiasis disease surveillance and surgery long after chlamydial infection has been controlled at community level. Blinding trachoma is believed to be the end result of a long-term progressive scarring process that is initiated by recurrent infection by the bacterium Chlamydia trachomatis starting in childhood. Scar tissue predominantly develops on the inner surface of the upper eyelids (conjunctiva). However, the rates, drivers and pathophysiological determinants are poorly understood. We investigated progressive scarring and its relationship to conjunctival infection, inflammation and transcript levels of cytokines and fibrogenic factors in two cohorts of adults in Tanzania and Ethiopia. These groups of people already had a degree of scarring and were regularly followed-up with over a two-year period. We found scarring progressed in about a quarter of people over this time. The progression was closely associated with episodes of conjunctival inflammation but not to the detection of C. trachomatis infection. This raises uncertainty about the primary drivers of late-stage trachoma. Chronic conjunctival inflammation appears to be central and is associated with enriched expression of pro-inflammatory factors and altered expression of extracellular matrix regulators. Host determinants of scarring progression appear more complex and subtle than the features of inflammation. Overall this indicates the likely need for trichiasis disease surveillance and surgery long after chlamydial infection has been controlled at community level.
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Jensen-Jarolim E, Fazekas J, Singer J, Hofstetter G, Oida K, Matsuda H, Tanaka A. Crosstalk of carcinoembryonic antigen and transforming growth factor-β via their receptors: comparing human and canine cancer. Cancer Immunol Immunother 2015; 64:531-7. [PMID: 25832000 PMCID: PMC4412651 DOI: 10.1007/s00262-015-1684-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 03/19/2015] [Indexed: 01/27/2023]
Abstract
There is accumulating evidence that the transforming growth factor beta (TGF-β) and nuclear factor kappa-B (NFκB) pathways are tightly connected and play a key role in malignant transformation in cancer. Immune infiltration by regulatory T- and B-lymphocytes (Tregs, Bregs) has recently gained increased attention for being an important source of TGF-β. There is a plethora of studies examining the pro-tumorigenic functions of carcinoembryonic antigen (CEA), but its receptor CEAR is far less studied. So far, there is a single connecting report that TGF-β also may signal through CEAR. The crosstalk between cancer tissues is further complicated by the expression of CEAR and TGF-β receptors in stromal cells, and implications of TGF-β in epithelial–mesenchymal transition. Furthermore, tumor-infiltrating Tregs and Bregs may directly instruct cancer cells by secreting TGF-β binding to their CEAR. Therefore, both TGF-β and CEA may act synergistically in breast cancer and cause disease progression, and NFκB could be a common crossing point between their signaling. CEAR, TGF-β1–3, TGF-β-R types I–III and NFκB class I and II molecules have an outstanding human–canine sequence identity, and only a canine CEA homolog has not yet been identified. For these reasons, the dog may be a valid translational model patient for investigating the crosstalk of the interconnected CEA and TGF-β networks.
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Affiliation(s)
- Erika Jensen-Jarolim
- Department of Comparative Medicine, Comparative Immunology and Oncology, Messerli Research Institute of the University of Veterinary Medicine Vienna, c/o Institute of Pathophysiology and Allergy Research, AKH 4Q, Medical University Vienna and University Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria,
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The anticancer effect of (1S,2S,3E,7E,11E)-3,7,11, 15-cembratetraen-17,2-olide(LS-1) through the activation of TGF-β signaling in SNU-C5/5-FU, fluorouracil-resistant human colon cancer cells. Mar Drugs 2015; 13:1340-59. [PMID: 25786063 PMCID: PMC4377987 DOI: 10.3390/md13031340] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 03/03/2015] [Accepted: 03/04/2015] [Indexed: 12/28/2022] Open
Abstract
The anticancer effect of (1S,2S,3E,7E,11E)-3,7,11,15-cembratetraen-17,2-olide (LS-1) from Lobophytum sp. has been already reported in HT-29 human colorectal cancer cells. In this study, we examined the effect of LS-1 on the apoptosis induction of SNU-C5/5-FU, fluorouracil-resistant human colon cancer cells. Furthermore, we investigated whether the apoptosis-induction effect of LS-1 could arise from the activation of the TGF-β pathway. In SNU-C5/5-FU treated with LS-1 of 7.1 μM (IC50), we could observe the various apoptotic characteristics, such as the increase of apoptotic bodies, the increase of the sub-G1 hypodiploid cell population, the decrease of the Bcl-2 level, the increase of procaspase-9 cleavage, the increase of procaspase-3 cleavage and the increase of poly(ADP-ribose) polymerase cleavage. Interestingly, the apoptosis-induction effect of LS-1 was also accompanied by the increase of Smad-3 phosphorylation and the downregulation of c-Myc in SNU-C5/5-FU. LS-1 also increased the nuclear localization of phospho-Smad-3 and Smad-4. We examined whether LS-1 could downregulate the expression of carcinoembryonic antigen (CEA), a direct inhibitor of TGF-β signaling. LS-1 decreased the CEA level, as well as the direct interaction between CEA and TGF-βR1 in the apoptosis-induction condition of SNU-C5/5-FU. To examine whether LS-1 can induce apoptosis via the activation of TGF-β signaling, the SNU-C5/5-FU cells were treated with LS-1 in the presence or absence of SB525334, a TGF-βRI kinase inhibitor. SB525334 inhibited the effect of LS-1 on the apoptosis induction. These findings provide evidence demonstrating that the apoptosis-induction effect of LS-1 results from the activation of the TGF-β pathway via the downregulation of CEA in SNU-C5/5-FU.
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A549 cells adapted to high nitric oxide show reduced surface CEACAM expression and altered adhesion and migration properties. Tumour Biol 2014; 36:1871-9. [PMID: 25500969 DOI: 10.1007/s13277-014-2789-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Accepted: 10/29/2014] [Indexed: 12/12/2022] Open
Abstract
The migration and adhesion properties of tumors affect their metastatic rate. In the present study, we investigated carcinoembryonic antigen-related cell adhesion molecule (CEACAM) 1, 5, and 6 expression in high nitric oxide (HNO)-adapted lung cancer cells compared to parent cells. We observed high transcript levels of CEACAM 1 (4S, 4L), CEACAM 5, and CEACAM 6 in HNO cells compared to parent cells. However, the surface expression was low in HNO cells. Interestingly, the intracellular protein levels were high for these three CEACAMs. We confirmed these results with immunohistochemical experiments. Further, the adhesion and migration assays showed reduced clumping in HNO-adapted A549 (A549-HNO) cells and faster migration rates, respectively. These results document the altered adhesion and migration properties of cells adapted to HNO. Further, our studies also indicate a dynamic regulation of CEACAM protein expression and surface transport in HNO cells.
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Zang M, Zhang B, Zhang Y, Li J, Su L, Zhu Z, Gu Q, Liu B, Yan M. CEACAM6 promotes gastric cancer invasion and metastasis by inducing epithelial-mesenchymal transition via PI3K/AKT signaling pathway. PLoS One 2014; 9:e112908. [PMID: 25398131 PMCID: PMC4232574 DOI: 10.1371/journal.pone.0112908] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 10/16/2014] [Indexed: 11/18/2022] Open
Abstract
Overexpressed CEACAM6 in tumor tissues plays important roles in invasion, metastasis and anoikis resistance in a variety of human cancers. We recently reported that CEACAM6 expression is upregulated in Gastric cancer (GC) tissues and promoted GC metastasis. Here, we report that CEACAM6 promotes peritoneal metastases in vivo and is negatively correlated with E-cadherin expression in GC tissues. Overexpressed CEACAM6 induced epithelial-mesenchymal transition (EMT) in GC, as measured by increases in the EMT markers N-cadherin, Vimentin and Slug while E-cadherin expression was decreased in CEACAM6-overexpressing GC cells; opposing results were observed in CEACAM6-silenced cells. Furthermore, E-cadherin expression was negatively correlated with depth of tumor invasion, lymph node metastasis and TNM stage in GC tissues. Additionally, CEACAM6 elevated matrix metalloproteinase-9 (MMP-9) activity in GC, and anti-MMP-9 antibody could reverse the increasing invasion and migration induced by CEACAM6. CEACAM6 also increased the levels of phosphorylated AKT, which is involved in the progression of a variety of human tumors. We further observed that LY294002, a PI3K inhibitor, could reverse CEACAM6-induced EMT via mesenchymal-epithelial transition. These findings suggest that CEACAM6 enhances invasion and metastasis in GC by promoting EMT via the PI3K/AKT signaling pathway.
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Affiliation(s)
- Mingde Zang
- Department of Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
| | - Baogui Zhang
- Department of Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
| | - Yunqiang Zhang
- Department of Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
| | - Jianfang Li
- Department of Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
| | - Liping Su
- Department of Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
| | - Zhenggang Zhu
- Department of Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
| | - Qinlong Gu
- Department of Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
| | - Bingya Liu
- Department of Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
- * E-mail: (BL); (MY)
| | - Min Yan
- Department of Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
- * E-mail: (BL); (MY)
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Robinson KM, Dunning Hotopp JC. Mobile elements and viral integrations prompt considerations for bacterial DNA integration as a novel carcinogen. Cancer Lett 2014; 352:137-44. [PMID: 24956175 DOI: 10.1016/j.canlet.2014.05.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 04/30/2014] [Accepted: 05/01/2014] [Indexed: 12/11/2022]
Abstract
Insertional mutagenesis has been repeatedly demonstrated in cancer genomes and has a role in oncogenesis. Mobile genetic elements can induce cancer development by random insertion into cancer related genes or by inducing translocations. L1s are typically implicated in cancers of an epithelial cell origin, while Alu elements have been implicated in leukemia as well as epithelial cell cancers. Likewise, viral infections have a significant role in cancer development predominantly through integration into the human genome and mutating or deregulating cancer related genes. Human papilloma virus is the best-known example of viral integrations contributing to carcinogenesis. However, hepatitis B virus, Epstein-Barr virus, and Merkel cell polyomavirus also integrate into the human genome and disrupt cancer related genes. Thus far, the role of microbes in cancer has primarily been attributed to mutations induced through chronic inflammation or toxins, as is the case with Helicobacter pylori and enterotoxigenic Bacteroides fragilis. We hypothesize that like mobile elements and viral DNA, bacterial and parasitic DNA may also integrate into the human somatic genome and be oncogenic. Until recently it was believed that bacterial DNA could not integrate into the human genome, but new evidence demonstrates that bacterial insertional mutagenesis may occur in cancer cells. Although this work does not show causation between bacterial insertions and cancer, it prompts more research in this area. Promising new sequencing technologies may reduce the risk of artifactual chimeric sequences, thus diminishing some of the challenges of identifying novel insertions in the somatic human genome.
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Affiliation(s)
- Kelly M Robinson
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Julie C Dunning Hotopp
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA; Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA; Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA.
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Zhang Y, Zang M, Li J, Ji J, Zhang J, Liu X, Qu Y, Su L, Li C, Yu Y, Zhu Z, Liu B, Yan M. CEACAM6 promotes tumor migration, invasion, and metastasis in gastric cancer. Acta Biochim Biophys Sin (Shanghai) 2014; 46:283-90. [PMID: 24492534 DOI: 10.1093/abbs/gmu001] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Carcinoembryonic antigen-related cell adhesion molecule 6 (CEACAM6) shows increased expression in a wide variety of human cancers, and its over-expression is associated with enhanced migration, invasion, and in vivo metastasis. Here, we reported that CEACAM6 was up-regulated in gastric cancer (GC) cell lines and tumor tissues. Over-expression of CEACAM6 in MKN-45 and SGC-7901 GC cells promoted migration and invasion in vitro and metastasis in athymic mice, whereas migration and invasion of MKN-28 and SNU-16 GC cells were suppressed by knockdown of CEACAM6. We also observed that steroid receptor coactivator (C-SRC) phosphorylation was increased when CEACAM6 was over-expressed in SGC-7901 cells. Taken together, these results suggested that CEACAM6 functions as an oncoprotein in GC and may be an important metastatic biomarker and therapeutic target.
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Affiliation(s)
- Yunqiang Zhang
- Shanghai Key Laboratory of Gastric Neoplasms, Department of Surgery, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
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Kim TA, Kang JM, Hyun JS, Lee B, Kim SJ, Yang ES, Hong S, Lee HJ, Fujii M, Niederhuber JE, Kim SJ. The Smad7-Skp2 complex orchestrates Myc stability, impacting on the cytostatic effect of TGF-β. J Cell Sci 2013; 127:411-21. [PMID: 24259667 DOI: 10.1242/jcs.136028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
In most human cancers the Myc proto-oncogene is highly activated. Dysregulation of Myc oncoprotein contributes to tumorigenesis in numerous tissues and organs. Thus, targeting Myc stability could be a crucial step for cancer therapy. Here we report Smad7 as a key molecule regulating Myc stability and activity by recruiting the F-box protein, Skp2. Ectopic expression of Smad7 downregulated the protein level of Myc without affecting the transcription level, and significantly repressed its transcriptional activity, leading to inhibition of cell proliferation and tumorigenic activity. Furthermore, Smad7 enhanced ubiquitylation of Myc through direct interaction with Myc and recruitment of Skp2. Ablation of Smad7 resulted in less sensitivity to the growth inhibitory effect of TGF-β by inducing stable Myc expression. In conclusion, these findings that Smad7 functions in Myc oncoprotein degradation and enhances the cytostatic effect of TGF-β signaling provide a possible new therapeutic approach for cancer treatment.
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Affiliation(s)
- Tae-Aug Kim
- CHA Cancer Institute, CHA University, Seoul 135-081, Korea
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Expression and clinical significance of carcinoembryonic antigen-related cell adhesion molecule 6 in breast cancers. Breast Cancer Res Treat 2013; 142:311-22. [PMID: 24186057 DOI: 10.1007/s10549-013-2756-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Accepted: 10/25/2013] [Indexed: 01/02/2023]
Abstract
Carcino-embryonic antigen-related cell adhesion molecule 6 (CEACAM6), one of the members of human carcino-embryonic antigens, is a multifunctional regulatory protein involved in various cellular processes in cancers. Its role in malignant transformation and the clinical significance has been extensively studied in colonic and pancreatic cancers. However, relatively few studies have been done on breast cancers. In the current study, CEACAM6 expression in two independent cohorts of invasive breast cancers were evaluated immunohistochemically and correlated with clinico-pathological features, biomarker profiles and patient survival. In the primary cohort, CEACAM6 expression was detected in 37.1 % (312/840) of primary invasive cancers. It was positively correlated with HER2 (p < 0.001). Concordantly, HER2-OE subtype showed the highest CEACAM6 expression (62.7 %) among all molecular subtypes; whereas, other subtypes also showed substantial CEACAM6 expression (21.8-37.5 %). Interestingly, a significantly worse overall survival was found in high pN stage HER2 positive cancers with CEACAM6 positivity (log-rank = 4.452, p = 0.035) and this could be validated in an independent cohort. Additionally, HER2 signaling was found to induce SMAD3 phosphorylation and CEACAM6 expression in a cell line model. Likewise, in the primary tumors, a positive association was found between HER2 and SMAD3 phosphorylation in CEACAM6 positive cancers (p = 0.012). Overall, CEACAM6 was widely expressed in different molecular subtypes, but highest and significantly in HER2-OE breast cancer. Within this group, CEACAM6 was associated with adverse high nodal stage patient outcome. Given the wide expression of CEACAM6 in all breast cancers, its roles as prognostic marker and therapeutic target warrant further evaluation.
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Wang J, Ma Y, Zhu ZH, Situ DR, Hu Y, Rong TH. Expression and prognostic relevance of tumor carcinoembryonic antigen in stage IB non-small cell lung cancer. J Thorac Dis 2013; 4:490-6. [PMID: 23050113 DOI: 10.3978/j.issn.2072-1439.2012.09.01] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2012] [Accepted: 09/06/2012] [Indexed: 02/06/2023]
Abstract
BACKGROUND High serum carcinoembryonic antigen (CEA) levels have been reported to be associated with poor prognosis in non-small cell lung cancer (NSCLC), while the prognostic role of tumor CEA expression remains to be defined. The present study investigated the expression of tumor CEA in stage IB NSCLC, and correlated it with clinicopathological features and prognosis. PATIENTS AND METHODS Immunohistochemistry for tumor CEA was assessed in the specimens of 183 patients with stage IB NSCLC. Receiver-operating characteristic (ROC) curve analysis was used to determine the cut-off score for tumor positivity. RESULTS High CEA expression was detected more frequently in adenocarcinomas (72.2%) and other NSCLCs (69.0%) than in squamous cell carcinomas (25.4%, P<0.001). Both univariate and multivariate analysis indicated that tumor CEA was an independent prognostic factor for overall and disease-free survival (P<0.05). CONCLUSIONS Elevated expression of tumor CEA may be an adverse prognostic indicator in stages IB NSCLC.
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Affiliation(s)
- Jian Wang
- Department of Anesthesia, Cancer Center, Sun Yat-sen University, Guangzhou 510060, China
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Riley DR, Sieber KB, Robinson KM, White JR, Ganesan A, Nourbakhsh S, Dunning Hotopp JC. Bacteria-human somatic cell lateral gene transfer is enriched in cancer samples. PLoS Comput Biol 2013; 9:e1003107. [PMID: 23840181 PMCID: PMC3688693 DOI: 10.1371/journal.pcbi.1003107] [Citation(s) in RCA: 111] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Accepted: 05/01/2013] [Indexed: 12/14/2022] Open
Abstract
There are 10× more bacterial cells in our bodies from the microbiome than human cells. Viral DNA is known to integrate in the human genome, but the integration of bacterial DNA has not been described. Using publicly available sequence data from the human genome project, the 1000 Genomes Project, and The Cancer Genome Atlas (TCGA), we examined bacterial DNA integration into the human somatic genome. Here we present evidence that bacterial DNA integrates into the human somatic genome through an RNA intermediate, and that such integrations are detected more frequently in (a) tumors than normal samples, (b) RNA than DNA samples, and (c) the mitochondrial genome than the nuclear genome. Hundreds of thousands of paired reads support random integration of Acinetobacter-like DNA in the human mitochondrial genome in acute myeloid leukemia samples. Numerous read pairs across multiple stomach adenocarcinoma samples support specific integration of Pseudomonas-like DNA in the 5′-UTR and 3′-UTR of four proto-oncogenes that are up-regulated in their transcription, consistent with conversion to an oncogene. These data support our hypothesis that bacterial integrations occur in the human somatic genome and may play a role in carcinogenesis. We anticipate that the application of our approach to additional cancer genome projects will lead to the more frequent detection of bacterial DNA integrations in tumors that are in close proximity to the human microbiome. There are 10× more bacterial cells in the human body than there are human cells that are part of the human microbiome. Many of those bacteria are in constant, intimate contact with human cells. We sought to establish if bacterial cells insert their own DNA into the human genome. Such random mutations could cause disease in the same manner that mutagens like UV rays from the sun or chemicals in cigarettes induce mutations. We detected the integration of bacterial DNA in the human genome more readily in tumors than normal samples. In particular, extensive amounts of DNA with similarity to Acinetobacter DNA were fused to human mitochondrial DNA in acute myeloid leukemia samples. We also identified specific integrations of DNA with similarity to Pseudomonas DNA near the untranslated regulatory regions of four proto-oncogenes. This supports our hypothesis that bacterial integrations occur in the human somatic genome that may potentially play a role in carcinogenesis. Further study in this area may provide new avenues for cancer prevention.
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Affiliation(s)
- David R. Riley
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Karsten B. Sieber
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Kelly M. Robinson
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - James Robert White
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Ashwinkumar Ganesan
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
- Computer Science and Electrical Engineering Department, University of Maryland Baltimore County, Baltimore, Maryland, United States of America
| | - Syrus Nourbakhsh
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
- University of Maryland College Park, College Park, Maryland, United States of America
| | - Julie C. Dunning Hotopp
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
- Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
- * E-mail:
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Fanayan S, Smith JT, Lee LY, Yan F, Snyder M, Hancock WS, Nice E. Proteogenomic analysis of human colon carcinoma cell lines LIM1215, LIM1899, and LIM2405. J Proteome Res 2013; 12:1732-42. [PMID: 23458625 DOI: 10.1021/pr3010869] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
As part of the genome-wide and chromosome-centric human proteomic project (C-HPP), we have integrated shotgun proteomics approach and a genome-wide transcriptomic approach (RNA-Seq) of a set of human colon cancer cell lines (LIM1215, LIM1899 and LIM2405) that were selected to represent a wide range of pathological states of colorectal cancer. The combination of a standard proteomics approach (1D-gel electrophoresis coupled to LC/ion trap mass spectrometry) and RNA-Seq allowed us to exploit the greater depth of the transcriptomics measurement (∼ 9800 transcripts per cell line) versus the protein observations (∼ 1900 protein identifications per cell line). Conversely, the proteomics data were helpful in identifying both cancer associated proteins with differential expression patterns as well as protein networks and pathways which appear to be deregulated in these cell lines. Examples of potential markers include mortalin, nucleophosmin, ezrin, LASP1, alpha and beta forms of spectrin, exportin, the carcinoembryonic antigen family, EGFR and MET. Interaction analyses identified the large intermediate filament family, the protein folding network and adapter proteins in focal adhesion networks, which included the CDC42 and RHOA signaling pathways that may have potential for identifying phenotypic states representing poorly and moderately differentiated states of CRC, with or without metastases.
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Affiliation(s)
- Susan Fanayan
- Department of Chemistry and Biomolecular Sciences, Macquarie University , Sydney, NSW 2109, Australia
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Lim S, Bae E, Kim HS, Kim TA, Byun K, Kim B, Hong S, Im JP, Yun C, Lee B, Lee B, Park SH, Letterio J, Kim SJ. TRAF6 mediates IL-1β/LPS-induced suppression of TGF-β signaling through its interaction with the type III TGF-β receptor. PLoS One 2012; 7:e32705. [PMID: 22427868 PMCID: PMC3299683 DOI: 10.1371/journal.pone.0032705] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2011] [Accepted: 01/30/2012] [Indexed: 12/22/2022] Open
Abstract
Transforming growth factor-β1 (TGF-β1) is an important anti-inflammatory cytokine that modulates and resolves inflammatory responses. Recent studies have demonstrated that inflammation enhances neoplastic risk and potentiates tumor progression. In the evolution of cancer, pro-inflammatory cytokines such as IL-1β must overcome the anti-inflammatory effects of TGF-β to boost pro-inflammatory responses in epithelial cells. Here we show that IL-1β or Lipopolysaccharide (LPS) suppresses TGF-β-induced anti-inflammatory signaling in a NF-κB-independent manner. TRAF6, a key molecule in IL-1β signaling, mediates this suppressive effect through interaction with the type III TGF-β receptor (TβRIII), which is TGF-β-dependent and requires type I TGF-β receptor (TβRI) kinase activity. TβRI phosphorylates TβRIII at residue S829, which promotes the TRAF6/TβRIII interaction and consequent sequestration of TβRIII from the TβRII/TβRI complex. Our data indicate that IL-1β enhances the pro-inflammatory response by suppressing TGF-βsignaling through TRAF6-mediated sequestration of TβRIII, which may be an important contributor to the early stages of tumor progression.
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Affiliation(s)
- Seunghwan Lim
- Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Eunjin Bae
- CHA Cancer Institute, CHA University, Gangnam-gu, Seoul, Korea
- Lee Gil Ya Cancer and Diabetes Institute, Gachon University of Medicine and Science, Songdo, Incheon, Korea
| | - Hae-Suk Kim
- Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Tae-Aug Kim
- Laboratory of Cancer and Stem Cell Biology, National Cancer Institute, Bethesda, Maryland, United States of America
| | - Kyunghee Byun
- Lee Gil Ya Cancer and Diabetes Institute, Gachon University of Medicine and Science, Songdo, Incheon, Korea
| | - Byungchul Kim
- Department of Biochemistry, College of Natural Sciences, Kangwon National University, Chuncheon, Korea
| | - Suntaek Hong
- Lee Gil Ya Cancer and Diabetes Institute, Gachon University of Medicine and Science, Songdo, Incheon, Korea
| | - Jong Pil Im
- Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio, United States of America
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, 28 Yongon-dong, Chongno-gu, Seoul, Korea
| | - Chohee Yun
- Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Bona Lee
- Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio, United States of America
- CHA Cancer Institute, CHA University, Gangnam-gu, Seoul, Korea
| | - Bonghee Lee
- Lee Gil Ya Cancer and Diabetes Institute, Gachon University of Medicine and Science, Songdo, Incheon, Korea
| | - Seok Hee Park
- Department of Molecular Biology, Sungkyunkwan University, Suwon, Korea
| | - John Letterio
- Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Seong-Jin Kim
- Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio, United States of America
- CHA Cancer Institute, CHA University, Gangnam-gu, Seoul, Korea
- Lee Gil Ya Cancer and Diabetes Institute, Gachon University of Medicine and Science, Songdo, Incheon, Korea
- * E-mail:
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Gaur P, Ranjan P, Sharma S, Patel JR, Bowzard JB, Rahman SK, Kumari R, Gangappa S, Katz JM, Cox NJ, Lal RB, Sambhara S, Lal SK. Influenza A virus neuraminidase protein enhances cell survival through interaction with carcinoembryonic antigen-related cell adhesion molecule 6 (CEACAM6) protein. J Biol Chem 2012; 287:15109-17. [PMID: 22396546 DOI: 10.1074/jbc.m111.328070] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The influenza virus neuraminidase (NA) protein primarily aids in the release of progeny virions from infected cells. Here, we demonstrate a novel role for NA in enhancing host cell survival by activating the Src/Akt signaling axis via an interaction with carcinoembryonic antigen-related cell adhesion molecule 6/cluster of differentiation 66c (C6). NA/C6 interaction leads to increased tyrosyl phosphorylation of Src, FAK, Akt, GSK3β, and Bcl-2, which affects cell survival, proliferation, migration, differentiation, and apoptosis. siRNA-mediated suppression of C6 resulted in a down-regulation of activated Src, FAK, and Akt, increased apoptosis, and reduced expression of viral proteins and viral titers in influenza virus-infected human lung adenocarcinoma epithelial and normal human bronchial epithelial cells. These findings indicate that influenza NA not only aids in the release of progeny virions, but also cell survival during viral replication.
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Affiliation(s)
- Pratibha Gaur
- Virology Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Road, New Delhi 110067, India
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Bajaj J, Maliekal TT, Vivien E, Pattabiraman C, Srivastava S, Krishnamurthy H, Giri V, Subramanyam D, Krishna S. Notch signaling in CD66+ cells drives the progression of human cervical cancers. Cancer Res 2011; 71:4888-97. [PMID: 21646470 DOI: 10.1158/0008-5472.can-11-0543] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Human epithelial tumor progression and metastasis involve cellular invasion, dissemination in the vasculature, and regrowth at metastatic sites. Notch signaling has been implicated in metastatic progression but its roles have yet to be fully understood. Here we report the important role of Notch signaling in maintaining cells expressing the carcinoembryonic antigen cell adhesion molecule CEACAM (CD66), a known mediator of metastasis. CD66 and Notch1 were studied in clinical specimens and explants of human cervical cancer, including specimens grown in a pathophysiologically relevant murine model. Gene expression profiling of CD66(+) cells from primary tumors showed enhanced features of Notch signaling, metastasis, and stemness. Significant differences were also seen in invasion, colony formation, and tumor forming efficiency between CD66(+) and CD66(-) cancer cells. Notably, CD66(+) cells showed a marked sensitivity to a Notch small molecule inhibitor. In support of studies in established cell lines, we documented the emergence of a tumorigenic CD66(+) cell subset within a metastatic lesion-derived cervical-cancer cell line. Similar to primary cancers, CD66 expression in the cell line was blocked by chemical and genetic inhibitors of ligand-dependent nuclear Notch signaling. Collectively, our work on the oncogenic properties of CD66(+) cells in epithelial cancers provides insights into the nature of tumor progression and offers a mechanistic rationale to inhibit the Notch signaling pathway as a generalized therapeutic strategy to treat metastatic cancers.
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MESH Headings
- Animals
- Antigens, CD/biosynthesis
- Antigens, CD/genetics
- Antigens, CD/metabolism
- Carcinoma, Squamous Cell/genetics
- Carcinoma, Squamous Cell/metabolism
- Carcinoma, Squamous Cell/pathology
- Cell Adhesion Molecules/biosynthesis
- Cell Adhesion Molecules/genetics
- Cell Adhesion Molecules/metabolism
- Disease Progression
- Female
- Flow Cytometry
- Gene Expression Profiling
- Humans
- Mice
- Mice, Inbred NOD
- Mice, SCID
- Receptors, Notch/biosynthesis
- Receptors, Notch/genetics
- Receptors, Notch/metabolism
- Signal Transduction
- Spheroids, Cellular
- Transplantation, Heterologous
- Uterine Cervical Neoplasms/genetics
- Uterine Cervical Neoplasms/metabolism
- Uterine Cervical Neoplasms/pathology
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Affiliation(s)
- Jeevisha Bajaj
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, UAS-GKVK Campus and Department of Radiotherapy, Kidwai Memorial Institute of Oncology, Bangalore, India
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CEACAM6 gene variants in inflammatory bowel disease. PLoS One 2011; 6:e19319. [PMID: 21559399 PMCID: PMC3084820 DOI: 10.1371/journal.pone.0019319] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2010] [Accepted: 03/31/2011] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND The carcinoembryonic antigen-related cell adhesion molecule 6 (CEACAM6) acts as a receptor for adherent-invasive E. coli (AIEC) and its ileal expression is increased in patients with Crohn's disease (CD). Given its contribution to the pathogenesis of CD, we aimed to investigate the role of genetic variants in the CEACAM6 region in patients with inflammatory bowel diseases (IBD). METHODOLOGY In this study, a total of 2,683 genomic DNA samples (including DNA from 858 CD patients, 475 patients with ulcerative colitis (UC), and 1,350 healthy, unrelated controls) was analyzed for eight CEACAM6 SNPs (rs10415946, rs1805223 = p.Pro42Pro, rs4803507, rs4803508, rs11548735 = p.Gly239Val, rs7246116 = pHis260His, rs2701, rs10416839). In addition, a detailed haplotype analysis and genotype-phenotype analysis were performed. Overall, our genotype analysis did not reveal any significant association of the investigated CEACAM6 SNPs and haplotypes with CD or UC susceptibility, although certain CEACAM6 SNPs modulated CEACAM6 expression in intestinal epithelial cell lines. Despite its function as receptor of AIEC in ileal CD, we found no association of the CEACAM6 SNPs with ileal or ileocolonic CD. Moreover, there was no evidence of epistasis between the analyzed CEACAM6 variants and the main CD-associated NOD2, IL23R and ATG16L1 variants. CONCLUSIONS This study represents the first detailed analysis of CEACAM6 variants in IBD patients. Despite its important role in bacterial attachment in ileal CD, we could not demonstrate a role for CEACAM6 variants in IBD susceptibility or regarding an ileal CD phenotype. Further functional studies are required to analyze if these gene variants modulate ileal bacterial attachment.
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Park EK, Jeon EH, Kim IH, Park SY. Recovery of Genes Epigenetically Altered by the Histone Deacetylase Inhibitor Scriptaid and Demethylating Agent 5-Azacytidine in Human Leukemia Cells. Genomics Inform 2010. [DOI: 10.5808/gi.2010.8.4.185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Serum carcinoembryonic antigen is associated with metabolic syndrome in female Korean non-smokers. Clin Chim Acta 2010; 412:527-30. [PMID: 21138741 DOI: 10.1016/j.cca.2010.11.033] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2010] [Revised: 11/19/2010] [Accepted: 11/22/2010] [Indexed: 01/23/2023]
Abstract
BACKGROUND Carcinoembryonic antigen (CEA), a serological marker of malignant tumors, demonstrates a modest increase under nonmalignant conditions and the pro-inflammatory features of CEA suggest that CEA may be related to insulin resistance and metabolic syndrome. METHODS A total of 7075 female Korean non-smokers who underwent health check-ups were analyzed in the present study. The interquartile cutoff values for serum CEA concentrations were 0.39, 0.84, and 1.40 ng/ml. RESULTS The prevalence of metabolic syndrome increased significantly with the increasing CEA quartiles, and the age-adjusted mean CEA concentration increased consistently with each additional component of metabolic syndrome. Logistic regression analysis adjusted for age, alcohol intake, exercise, body mass index, total cholesterol, WBC count, and hsCRP showed that the third and fourth CEA quartiles were associated with metabolic syndrome with odds ratios of 1.29 (95% CI 1.07 to 1.63 P<0.001) and 1.39 (95% CI 1.10 to 1.66, P<0.001), respectively. CONCLUSION In female Korean non-smokers, serum CEA was independently associated with metabolic syndrome. The pathophysiologic and clinical significance of these findings requires further investigation.
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Li Y, Cao H, Jiao Z, Pakala SB, Sirigiri DNR, Li W, Kumar R, Mishra L. Carcinoembryonic antigen interacts with TGF-{beta} receptor and inhibits TGF-{beta} signaling in colorectal cancers. Cancer Res 2010; 70:8159-68. [PMID: 20889724 PMCID: PMC3001246 DOI: 10.1158/0008-5472.can-10-1073] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
As a tumor marker for colorectal cancers, carcinoembryonic antigen (CEA) enhances the metastatic potential of cancer cells. CEA functions as an intercellular adhesion molecule and is upregulated in a wide variety of human cancers. However, the molecular mechanisms by which CEA mediates metastasis remain to be understood. Transforming growth factor-β (TGF-β) signaling regulates both tumor suppression and metastasis, and also contributes to the stimulation of CEA transcription and secretion in colorectal cancer cells. However, it remains unknown whether CEA, in turn, influences TGF-β functions and if a regulatory cross-talk exists between CEA and the TGF-β signaling pathway. Here, we report that CEA directly interacts with TGF-β receptor and inhibits TGF-β signaling. Targeting CEA with either CEA-specific antibody or siRNA rescues TGF-β response in colorectal cancer cell lines with elevated CEA, thereby restoring the inhibitory effects of TGF-β signaling on proliferation. CEA also enhances the survival of colorectal cancer cells in both local colonization and liver metastasis in animal study. Our study provides novel insights into the interaction between CEA and TGF-β signaling pathway and establishes a negative feedback loop in amplifying the progression of colon cancer cells to more invasive phenotypes. These findings offer new therapeutic opportunities to inhibit colorectal cancer cell proliferation by cotargeting CEA in promoting tumor-inhibitory action of the TGF-β pathway.
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Affiliation(s)
- Ying Li
- Department of Gastroenterology, Hepatology and Nutrition, MD Anderson Cancer Center, the University of Texas
| | - Hong Cao
- Department of Gastroenterology, Hepatology and Nutrition, MD Anderson Cancer Center, the University of Texas
| | - Zhongxian Jiao
- Department of Gastroenterology, Hepatology and Nutrition, MD Anderson Cancer Center, the University of Texas
| | - Suresh B. Pakala
- Department of Biochemistry and Molecular Biology, the George Washington University Medical Center, Washington, DC 22237
| | | | - Wenpin Li
- Department of Gastroenterology, Hepatology and Nutrition, MD Anderson Cancer Center, the University of Texas
| | - Rakesh Kumar
- Department of Biochemistry and Molecular Biology, the George Washington University Medical Center, Washington, DC 22237
| | - Lopa Mishra
- Department of Gastroenterology, Hepatology and Nutrition, MD Anderson Cancer Center, the University of Texas
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Kolla V, Gonzales LW, Bailey NA, Wang P, Angampalli S, Godinez MH, Madesh M, Ballard PL. Carcinoembryonic cell adhesion molecule 6 in human lung: regulated expression of a multifunctional type II cell protein. Am J Physiol Lung Cell Mol Physiol 2009; 296:L1019-30. [PMID: 19329538 DOI: 10.1152/ajplung.90596.2008] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Carcinoembryonic cell adhesion molecule 6 (CEACAM6) is a glycosylated, glycosylphosphatidylinositol (GPI)-anchored protein expressed in epithelial cells of various human tissues. It binds gram-negative bacteria and is overexpressed in cancers, where it is antiapoptotic and promotes metastases. To characterize CEACAM6 expression in developing lung, we cultured human fetal lung epithelial cells and examined responses to differentiation-promoting hormones, adenovirus expressing thyroid transcription factor-1 (TTF-1), and silencing of TTF-1 with small inhibitory RNA. Glucocorticoid and cAMP had additive stimulatory effects on CEACAM6 content, and combined treatment maximally increased transcription rate, mRNA, and protein approximately 10-fold. Knockdown of TTF-1 reduced hormone induction of CEACAM6 by 80%, and expression of recombinant TTF-1 increased CEACAM6 in a dose-dependent fashion. CEACAM6 content of lung tissue increased during the third trimester and postnatally. By immunostaining, CEACAM6 was present in fetal type II cells, but not mesenchymal cells, and localized to both the plasma membrane and within surfactant-containing lamellar bodies. CEACAM6 was secreted from cultured type II cells and was present in both surfactant and supernatant fractions of infant tracheal aspirates. In functional studies, CEACAM6 reduced inhibition of surfactant surface properties by proteins in vitro and blocked apoptosis of electroporated cultured cells. We conclude that CEACAM6 in fetal lung epithelial cells is developmentally and hormonally regulated and a target protein for TTF-1. Because CEACAM6 acts as an antiapoptotic factor and stabilizes surfactant function, in addition to a putative role in innate defense against bacteria, we propose that it is a multifunctional alveolar protein.
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Affiliation(s)
- Venkatadri Kolla
- Department of Pediatrics , Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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