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Zhang L, Xie P, Li M, Zhang X, Fei S, Zhao N, Li L, Xie Q, Xu Z, Tang W, Zhu G, Zhu Z, Xu Z, Li J, Zhang C, Boyer JL, Chen W, Cai SY, Pan Q, Chai J. Hepatic GDP-fucose transporter SLC35C1 attenuates cholestatic liver injury and inflammation by inducing CEACAM1 N153 fucosylation. Hepatology 2024:01515467-990000000-00953. [PMID: 38985995 DOI: 10.1097/hep.0000000000001003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 06/13/2024] [Indexed: 07/12/2024]
Abstract
BACKGROUND AND AIMS Inflammatory response is crucial for bile acid (BA)-induced cholestatic liver injury, but molecular mechanisms remain to be elucidated. Solute Carrier Family 35 Member C1 (SLC35C1) can transport Guanosine diphosphate-fucose into the Golgi to facilitate protein glycosylation. Its mutation leads to the deficiency of leukocyte adhesion and enhances inflammation in humans. However, little is known about its role in liver diseases. APPROACH AND RESULTS Hepatic SLC35C1 mRNA transcripts and protein expression were significantly increased in patients with obstructive cholestasis and mouse models of cholestasis. Immunofluorescence revealed that the upregulated SLC35C1 expression mainly occurred in hepatocytes. Liver-specific ablation of Slc35c1 ( Slc35c1 cKO ) significantly aggravated liver injury in mouse models of cholestasis induced by bile duct ligation and 1% cholic acid-feeding, evidenced by increased liver necrosis, inflammation, fibrosis, and bile ductular proliferation. The Slc35c1 cKO increased hepatic chemokine Ccl2 and Cxcl2 expression and T cell, neutrophil, and F4/80 macrophage infiltration but did not affect the levels of serum and liver BA in mouse models of cholestasis. Liquid chromatography with tandem mass spectrometry analysis revealed that hepatic Slc35c1 deficiency substantially reduced the fucosylation of cell-cell adhesion protein CEACAM1 at N153. Mechanistically, cholestatic levels of conjugated BAs stimulated SLC35C1 expression by activating the STAT3 signaling to facilitate CEACAM1 fucosylation at N153, and deficiency in the fucosylation of CEACAM1 at N135 enhanced the BA-stimulated CCL2 and CXCL2 mRNA expression in primary mouse hepatocytes and Primary Liver Carcinoma/Poliomyelitis Research Foundation/5- ASBT cells. CONCLUSIONS Elevated hepatic SLC35C1 expression attenuates cholestatic liver injury by enhancing CEACAM1 fucosylation to suppress CCL2 and CXCL2 expression and liver inflammation.
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Affiliation(s)
- Liangjun Zhang
- Department of Gastroenterology, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
- Institute of Digestive Diseases of PLA, Southwest Hospital Third Military Medical University (Army Medical University), Chongqing, China
- Cholestatic Liver Diseases Center and Center for Metabolic-Associated Fatty Liver Disease, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
| | - Pingfan Xie
- Department of Gastroenterology, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
- Institute of Digestive Diseases of PLA, Southwest Hospital Third Military Medical University (Army Medical University), Chongqing, China
- Cholestatic Liver Diseases Center and Center for Metabolic-Associated Fatty Liver Disease, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
| | - Mingqiao Li
- Department of Gastroenterology, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
- Institute of Digestive Diseases of PLA, Southwest Hospital Third Military Medical University (Army Medical University), Chongqing, China
- Cholestatic Liver Diseases Center and Center for Metabolic-Associated Fatty Liver Disease, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
| | - Xiaoxun Zhang
- Department of Gastroenterology, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
- Institute of Digestive Diseases of PLA, Southwest Hospital Third Military Medical University (Army Medical University), Chongqing, China
- Cholestatic Liver Diseases Center and Center for Metabolic-Associated Fatty Liver Disease, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
| | - Shuke Fei
- The Second Affiliated Hospital, Department of Hepatobiliary, Pancreatic and Splenic Surgery, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Nan Zhao
- Department of Gastroenterology, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
- Institute of Digestive Diseases of PLA, Southwest Hospital Third Military Medical University (Army Medical University), Chongqing, China
- Cholestatic Liver Diseases Center and Center for Metabolic-Associated Fatty Liver Disease, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
| | - Ling Li
- Department of Gastroenterology, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
- Institute of Digestive Diseases of PLA, Southwest Hospital Third Military Medical University (Army Medical University), Chongqing, China
- Cholestatic Liver Diseases Center and Center for Metabolic-Associated Fatty Liver Disease, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
| | - Qiaoling Xie
- Department of Gastroenterology, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
- Institute of Digestive Diseases of PLA, Southwest Hospital Third Military Medical University (Army Medical University), Chongqing, China
- Cholestatic Liver Diseases Center and Center for Metabolic-Associated Fatty Liver Disease, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
| | - Ziqian Xu
- Department of Gastroenterology, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
- Institute of Digestive Diseases of PLA, Southwest Hospital Third Military Medical University (Army Medical University), Chongqing, China
- Cholestatic Liver Diseases Center and Center for Metabolic-Associated Fatty Liver Disease, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
| | - Wan Tang
- Department of Gastroenterology, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
- Institute of Digestive Diseases of PLA, Southwest Hospital Third Military Medical University (Army Medical University), Chongqing, China
- Cholestatic Liver Diseases Center and Center for Metabolic-Associated Fatty Liver Disease, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
| | - Guanyu Zhu
- Department of Gastroenterology, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
- Institute of Digestive Diseases of PLA, Southwest Hospital Third Military Medical University (Army Medical University), Chongqing, China
- Cholestatic Liver Diseases Center and Center for Metabolic-Associated Fatty Liver Disease, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
| | - Zhixian Zhu
- Department of Gastroenterology, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
- Institute of Digestive Diseases of PLA, Southwest Hospital Third Military Medical University (Army Medical University), Chongqing, China
- Cholestatic Liver Diseases Center and Center for Metabolic-Associated Fatty Liver Disease, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
| | - Zuzhi Xu
- Department of Gastroenterology, Institute of Digestive Diseases of PLA, Cholestatic Liver Diseases Center and Center for Metabolic-Associated Fatty Liver Disease, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
- The Second Affiliated Hospital, Hengyang Medical School, University of South China
| | - Jianwei Li
- Institute of Hepatobiliary Surgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Chengcheng Zhang
- Institute of Hepatobiliary Surgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - James L Boyer
- Department of Internal Medicine and Liver Center, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Wensheng Chen
- Department of Gastroenterology, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
- Institute of Digestive Diseases of PLA, Southwest Hospital Third Military Medical University (Army Medical University), Chongqing, China
| | - Shi-Ying Cai
- Department of Internal Medicine and Liver Center, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Qiong Pan
- Department of Gastroenterology, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
- Institute of Digestive Diseases of PLA, Southwest Hospital Third Military Medical University (Army Medical University), Chongqing, China
- Cholestatic Liver Diseases Center and Center for Metabolic-Associated Fatty Liver Disease, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
| | - Jin Chai
- Department of Gastroenterology, Institute of Digestive Diseases of PLA, Cholestatic Liver Diseases Center and Center for Metabolic-Associated Fatty Liver Disease, the First Affiliated Hospital (Southwest Hospital), Third Military Medical University (Army Medical University), Chongqing, China
- The Second Affiliated Hospital, Hengyang Medical School, University of South China
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Chatzilakou E, Hu Y, Jiang N, Yetisen AK. Biosensors for melanoma skin cancer diagnostics. Biosens Bioelectron 2024; 250:116045. [PMID: 38301546 DOI: 10.1016/j.bios.2024.116045] [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: 10/20/2023] [Revised: 01/10/2024] [Accepted: 01/15/2024] [Indexed: 02/03/2024]
Abstract
Skin cancer is a critical global public health concern, with melanoma being the deadliest variant, correlated to 80% of skin cancer-related deaths and a remarkable propensity to metastasize. Despite notable progress in skin cancer prevention and diagnosis, the limitations of existing methods accentuate the demand for precise diagnostic tools. Biosensors have emerged as valuable clinical tools, enabling rapid and reliable point-of-care (POC) testing of skin cancer. This review offers insights into skin cancer development, highlights essential cutaneous melanoma biomarkers, and assesses the current landscape of biosensing technologies for diagnosis. The comprehensive analysis in this review underscores the transformative potential of biosensors in revolutionizing melanoma skin cancer diagnosis, emphasizing their critical role in advancing patient outcomes and healthcare efficiency. The increasing availability of these approaches supports direct diagnosis and aims to reduce the reliance on biopsies, enhancing POC diagnosis. Recent advancements in biosensors for skin cancer diagnosis hold great promise, with their integration into healthcare expected to enhance early detection accuracy and reliability, thereby mitigating socioeconomic disparities.
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Affiliation(s)
- Eleni Chatzilakou
- Department of Chemical Engineering, Imperial College London, South Kensington, London, SW7 2BU, UK
| | - Yubing Hu
- Department of Chemical Engineering, Imperial College London, South Kensington, London, SW7 2BU, UK.
| | - Nan Jiang
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, 610041, China; JinFeng Laboratory, Chongqing, 401329, China.
| | - Ali K Yetisen
- Department of Chemical Engineering, Imperial College London, South Kensington, London, SW7 2BU, UK.
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3
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Pini T, Leahy T, Soleilhavoup C, Tsikis G, Labas V, Combes-Soia L, Harichaux G, Rickard JP, Druart X, de Graaf SP. Proteomic Investigation of Ram Spermatozoa and the Proteins Conferred by Seminal Plasma. J Proteome Res 2016; 15:3700-3711. [PMID: 27636150 DOI: 10.1021/acs.jproteome.6b00530] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Sperm proteomes have emerged for several species; however, the extent of species similarity is unknown. Sheep are an important agricultural species for which a comprehensive sperm proteome has not been produced. In addition, potential proteomic factors from seminal plasma that may contribute to improved fertility after cervical insemination are yet to be explored. Here we use liquid chromatography-tandem mass spectrometry to investigate the proteome of ejaculated ram spermatozoa, with quantitative comparison to epididymal spermatozoa. We also present a comparison to published proteomes of five other species. We identified 685 proteins in ejaculated ram spermatozoa, with the most abundant proteins involved in metabolic pathways. Only 5% of ram sperm proteins were not detected in other species, which suggest highly conserved structures and pathways. Of the proteins present in both epididymal and ejaculated ram spermatozoa, 7% were more abundant in ejaculated spermatozoa. Only two membrane-bound proteins were detected solely in ejaculated sperm lysates: liver enriched gene 1 (LEG1/C6orf58) and epidermal growth factor-like repeats and discoidin I-like domains 3 (EDIL3). This is the first evidence that despite its relatively complex proteomic composition, seminal plasma exposure leads to few novel proteins binding tightly to the ram sperm plasma membrane.
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Affiliation(s)
- Taylor Pini
- Faculty of Veterinary Science, School of Life and Environmental Sciences, The University of Sydney , Sydney, New South Wales 2006, Australia
| | - Tamara Leahy
- Faculty of Veterinary Science, School of Life and Environmental Sciences, The University of Sydney , Sydney, New South Wales 2006, Australia
| | | | - Guillaume Tsikis
- PRC, INRA, CNRS, IFCE, Université de Tours , 37380 Nouzilly, France
| | - Valerie Labas
- PRC, INRA, CNRS, IFCE, Université de Tours , 37380 Nouzilly, France
| | | | | | - Jessica P Rickard
- Faculty of Veterinary Science, School of Life and Environmental Sciences, The University of Sydney , Sydney, New South Wales 2006, Australia
| | - Xavier Druart
- PRC, INRA, CNRS, IFCE, Université de Tours , 37380 Nouzilly, France
| | - Simon P de Graaf
- Faculty of Veterinary Science, School of Life and Environmental Sciences, The University of Sydney , Sydney, New South Wales 2006, Australia
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4
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Determination of a Comprehensive Alternative Splicing Regulatory Network and Combinatorial Regulation by Key Factors during the Epithelial-to-Mesenchymal Transition. Mol Cell Biol 2016; 36:1704-19. [PMID: 27044866 DOI: 10.1128/mcb.00019-16] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 03/28/2016] [Indexed: 12/31/2022] Open
Abstract
The epithelial-to-mesenchymal transition (EMT) is an essential biological process during embryonic development that is also implicated in cancer metastasis. While the transcriptional regulation of EMT has been well studied, the role of alternative splicing (AS) regulation in EMT remains relatively uncharacterized. We previously showed that the epithelial cell-type-specific proteins epithelial splicing regulatory proteins 1 (ESRP1) and ESRP2 are important for the regulation of many AS events that are altered during EMT. However, the contributions of the ESRPs and other splicing regulators to the AS regulatory network in EMT require further investigation. Here, we used a robust in vitro EMT model to comprehensively characterize splicing switches during EMT in a temporal manner. These investigations revealed that the ESRPs are the major regulators of some but not all AS events during EMT. We determined that the splicing factor RBM47 is downregulated during EMT and also regulates numerous transcripts that switch splicing during EMT. We also determined that Quaking (QKI) broadly promotes mesenchymal splicing patterns. Our study highlights the broad role of posttranscriptional regulation during the EMT and the important role of combinatorial regulation by different splicing factors to fine tune gene expression programs during these physiological and developmental transitions.
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5
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Yu H, Yu J, Ren Y, Yang Y, Xiao X. Serum CEACAM1 Level Is Associated with Diagnosis and Prognosis in Patients with Osteosarcoma. PLoS One 2016; 11:e0153601. [PMID: 27074014 PMCID: PMC4830595 DOI: 10.1371/journal.pone.0153601] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 03/31/2016] [Indexed: 12/15/2022] Open
Abstract
Carcinoembryonic antigen related cell adhesion molecule 1 (CEACAM1) is a trans-membrane multifunctional cell adhesion molecule associated with tumor cell proliferation, apoptosis, angiogenesis, invasion, and migration during tumor development. In the present study, we evaluated serum CEACAM1 level in osteosarcoma patients to explore its diagnostic and prognostic value for this particular malignancy. Sera from 113 patients with primary osteosarcoma, 98 patients with benign bone tumors and 126 healthy controls were obtained. Serum CEACAM1 level was measured with ELISA and correlation with clinicopathological characteristics was further analyzed. Receiver operating curves (ROC), Kaplan-Meier curves, and log-rank analyses as well as Cox proportional hazard models were used to evaluate diagnostic and prognostic significance. The results revealed that serum CEACAM1 level was significantly higher in osteosarcoma patients compared to benign bone tumors and healthy controls (455.2 ± 179.9 vs 287.4 ± 103.2, 260.8 ± 109.7 pg/ml, respectively). Osteosarcoma patients with larger tumors, later-tumor stages, low tumor grades, and distant metastases had much higher CEACAM1 compared to those with smaller tumors, earlier tumor stages, high tumor grades and non-distant metastases (P < 0.05 for all). Multivariate logistic regression analysis confirmed that high serum CEACAM1 level was an independent risk factor for distant metastases (OR = 3.02, 95%CI 1.65–4.17). To distinguish osteosarcoma patients from those with benign bone tumor and healthy controls, ROC/AUC analysis indicated an AUC of 0.81 (sensitivity 0.61; specificity 0.89) and an AUC of 0.77 (sensitivity 0.57; specificity 0.92), respectively. Osteosarcoma patients with higher CEACAM1 had relatively lower survival compared to those with low CEACAM1 (P < 0.01), and multivariate analyses for overall survival revealed that high serum CEACAM1 level was an independent prognostic factor for osteosarcoma (HR = 1.56, 95%CI 1.23–3.28). The present study suggested that elevated serum CEACAM1 level might be a novel diagnostic and prognostic biomarker for osteosarcoma patients.
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Affiliation(s)
- Haiying Yu
- Department of Radiology, Shandong Cancer Hospital and Institute, Affiliated to Shandong Academy of Medical Science, Jinan, Shandong, China
| | - Jian Yu
- Department of Orthopedics, Caoxian People’s hospital, Shandong, China
| | - Yanjun Ren
- Department of Orthopedics, Shandong Provincial Qianfoshan Hospital, Jinan, Shandong, China
| | - Yun Yang
- Department of Orthopedics, Shandong Provincial Qianfoshan Hospital, Jinan, Shandong, China
| | - Xing Xiao
- Department of Orthopedics, Shandong Provincial Qianfoshan Hospital, Jinan, Shandong, China
- * E-mail:
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6
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Wang Y, Chen Y, Yan Y, Li X, Chen G, He N, Shen S, Chen G, Zhang C, Liao W, Liao Y, Bin J. Loss of CEACAM1, a Tumor-Associated Factor, Attenuates Post-infarction Cardiac Remodeling by Inhibiting Apoptosis. Sci Rep 2016; 6:21972. [PMID: 26911181 PMCID: PMC4766464 DOI: 10.1038/srep21972] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 01/29/2016] [Indexed: 12/30/2022] Open
Abstract
Carcinoembryonic antigen-related cell adhesion molecule1 (CEACAM1) is a tumor-associated factor that is known to be involved in apoptosis, but the role of CEACAM1 in cardiovascular disease is unclear. We aims to investigate whether CEACAM1 influences cardiac remodeling in mice with myocardial infarction (MI) and hypoxia-induced cardiomyocyte injury. Both serum in patients and myocardial CEACAM1 levels in mice were significantly increased in response to MI, while levels were elevated in neonatal rat cardiomyocytes (NRCs) exposed to hypoxia. Eight weeks after MI, a lower mortality rate, improved cardiac function, and less cardiac remodeling in CEACAM1 knock-out (KO) mice than in their wild-type (WT) littermates were observed. Moreover, myocardial expression of mitochondrial Bax, cytosolic cytochrome C, and cleaved caspase-3 was significantly lower in CEACAM1 KO mice than in WT mice. In cultured NRCs exposed to hypoxia, recombinant human CEACAM1 (rhCEACAM1) reduced mitochondrial membrane potential, upregulated mitochondrial Bax, increased cytosolic cytochrome C and cleaved caspase-3, and consequently increased apoptosis. RhCEACAM1 also increased the levels of GRP78 and CHOP in NRCs with hypoxia. All of these effects were abolished by silencing CEACAM1. Our study indicates that CEACAM1 exacerbates hypoxic cardiomyocyte injury and post-infarction cardiac remodeling by enhancing cardiomyocyte mitochondrial dysfunction and endoplasmic reticulum stress-induced apoptosis.
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Affiliation(s)
- Yan Wang
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Yanmei Chen
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Yi Yan
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Xinzhong Li
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Guojun Chen
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Nvqin He
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Shuxin Shen
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.,Department of Cardiology, Henan Provincial People's Hospital, Zhengzhou University, Zhengzhou, 450003, China
| | - Gangbin Chen
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Chuanxi Zhang
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Wangjun Liao
- Department of Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Yulin Liao
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Jianping Bin
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
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Serum CEACAM1 Elevation Correlates with Melanoma Progression and Failure to Respond to Adoptive Cell Transfer Immunotherapy. J Immunol Res 2015; 2015:902137. [PMID: 26688824 PMCID: PMC4673329 DOI: 10.1155/2015/902137] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 10/08/2015] [Accepted: 10/15/2015] [Indexed: 01/17/2023] Open
Abstract
Malignant melanoma is a devastating disease whose incidences are continuously rising. The recently approved antimelanoma therapies carry new hope for metastatic patients for the first time in decades. However, the clinical management of melanoma is severely hampered by the absence of effective screening tools. The expression of the CEACAM1 adhesion molecule on melanoma cells is a strong predictor of poor prognosis. Interestingly, a melanoma-secreted form of CEACAM1 (sCEACAM1) has recently emerged as a potential tumor biomarker. Here we add novel evidences supporting the prognostic role of serum CEACAM1 by using a mice xenograft model of human melanoma and showing a correlation between serum CEACAM1 and tumor burden. Moreover, we demonstrate that serum CEACAM1 is elevated over time in progressive melanoma patients who fail to respond to immunotherapy as opposed to responders and stable disease patients, thus proving a correlation between sCEACAM1, response to treatment, and clinical deterioration.
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Yang C, He P, Liu Y, He Y, Yang C, Du Y, Zhou M, Wang W, Zhang G, Wu M, Gao F. Down-regulation of CEACAM1 in breast cancer. Acta Biochim Biophys Sin (Shanghai) 2015; 47:788-94. [PMID: 26341981 DOI: 10.1093/abbs/gmv075] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 06/01/2015] [Indexed: 01/12/2023] Open
Abstract
Carcinoembryonic antigen-related adhesion molecule 1 (CEACAM1) is a type 1 transmembrane glycoprotein belonging to the CEA family, which has been found to exist as either soluble forms in body fluids or membrane-bound forms on the cell surface. Aberrant CEACAM1 expression is associated with tumor progression and has been found in a variety of human malignancies. Increasing interest has been devoted to the expression of CEACAM1 in breast cancer, but most of these findings are contradictory. The aim of this study was to investigate CEACAM1 expression in breast cancer in greater detail. Using immunohistochemical staining, we found that CEACAM1 expression was reduced or lost in breast cancer tissues compared with noncancerous breast tissues. In addition, soluble CEACAM1 levels in the culture medium of breast cancer cell lines were significantly lower than those in a nontumorigenic breast epithelial cell line. Immunofluorescence analysis consistently showed that breast cancer cell lines have relatively low expression of membrane-bound CEACAM1. Furthermore, CEACAM1 mRNA and protein expression levels were down-regulated in breast cancer cell lines as measured using real-time reverse transcriptase-polymerase chain reaction and western blot analysis, respectively. Taken together, our results demonstrate a systematic down-regulation of CEACAM1 in breast cancer and suggest that a strategy to restore CEACAM1 expression may be helpful for the treatment of breast cancer.
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Affiliation(s)
- Changcheng Yang
- Department of Molecular Biology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Pingqing He
- Department of Breast Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Yiwen Liu
- Department of Molecular Biology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Yiqing He
- Department of Molecular Biology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Cuixia Yang
- Department of Molecular Biology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Yan Du
- Department of Molecular Biology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Muqing Zhou
- Department of Molecular Biology and Clinical Laboratory, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Wenjuan Wang
- Department of Molecular Biology and Clinical Laboratory, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Guoliang Zhang
- Department of Molecular Biology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Man Wu
- Department of Molecular Biology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Feng Gao
- Department of Molecular Biology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China Department of Molecular Biology and Clinical Laboratory, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
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9
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Yang C, He P, Liu Y, He Y, Yang C, Du Y, Zhou M, Wang W, Zhang G, Wu M, Gao F. Assay of serum CEACAM1 as a potential biomarker for breast cancer. Clin Chim Acta 2015; 450:277-81. [PMID: 26343926 DOI: 10.1016/j.cca.2015.09.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2015] [Revised: 09/01/2015] [Accepted: 09/02/2015] [Indexed: 11/20/2022]
Abstract
BACKGROUND Carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1) is a widely expressed multi-functional adhesion molecule reported to serve as a serum biomarker in several types of cancer. However, the serum CEACAM1 expression in breast cancer is unclear. We investigated the serum concentrations of CEACAM1 in patients with breast cancer and determine the potential of serum CEACAM1 as a breast cancer biomarker. METHODS Serum specimens were obtained from 33 patients with breast cancer, 30 patients with benign breast diseases and 34 healthy donors. The serum CEACAM1 concentrations were examined by an enzyme-linked immunosorbent assay (ELISA). RESULTS The serum CEACAM1 concentrations in the malignant group (532 ng/ml) were significantly higher than those of the benign group (423 ng/ml) and healthy control group (386 ng/ml) (both p<0.001). Based on univariable logistic regression, serum CEACAM1 concentrations significantly predicted breast cancer versus normal controls or benign breast diseases. Area under receiver operating characteristic curve (ROC) for serum CEACAM1 was 0.925(95% CI: 0.866-0.984). The optimal cut-off concentration of CEACAM1 was 475.82 ng/ml for discriminating breast cancer from normal controls. CONCLUSION Serum concentrations of CEACAM1 may serve as a useful indicator for the presence of breast cancer.
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Affiliation(s)
- Changcheng Yang
- Department of Molecular Biology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, PR China
| | - Pingqing He
- Department of Breast Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, PR China
| | - Yiwen Liu
- Department of Molecular Biology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, PR China
| | - Yiqing He
- Department of Molecular Biology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, PR China
| | - Cuixia Yang
- Department of Molecular Biology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, PR China
| | - Yan Du
- Department of Molecular Biology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, PR China
| | - Muqing Zhou
- Department of Molecular Biology and Clinical Laboratory, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, PR China
| | - Wenjuan Wang
- Department of Molecular Biology and Clinical Laboratory, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, PR China
| | - Guoliang Zhang
- Department of Molecular Biology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, PR China
| | - Man Wu
- Department of Molecular Biology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, PR China
| | - Feng Gao
- Department of Molecular Biology and Clinical Laboratory, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, PR China.
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Zariri A, van Dijken H, Hamstra HJ, van der Flier M, Vidarsson G, van Putten JPM, Boog CJP, van den Dobbelsteen G, van der Ley P. Expression of human CEACAM1 in transgenic mice limits the Opa-specific immune response against meningococcal outer membrane vesicles. Vaccine 2013; 31:5585-93. [PMID: 23933369 DOI: 10.1016/j.vaccine.2013.07.069] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Revised: 07/18/2013] [Accepted: 07/25/2013] [Indexed: 10/26/2022]
Abstract
Outer membrane vesicles (OMVs) have been extensively investigated as meningococcal vaccine candidates. Among their major components are the opacity (Opa) proteins, a family of surface-exposed outer membrane proteins important for bacterial adherence and entry into host cells. Many Opa-dependent interactions are mediated through the carcinoembryonic antigen-related cell adhesion molecule (CEACAM) family of receptors. Importantly, binding of Opa to CEACAM1 has been reported to suppress human CD4 T cell proliferation in vitro in response to OMV preparations. This raises the question whether OMV vaccines should contain Opa proteins at all. Until now it has been difficult to answer this question, as the proposed immunosuppressive effect was only demonstrated with human cells in vitro, while immunization experiments in mice are not informative because the Opa interaction is specific for human CEACAM1. In the present study we have used Opa+ and Opa- OMVs for immunization experiments in a human CEACAM1 transgenic mouse model. OMVs were prepared from a meningococcal strain H44/76 variant expressing the CEACAM1-binding OpaJ protein, and from an isogenic variant in which all opa genes have been inactivated. Both the CEACAM1 expressing transgenic mice and their congenic littermates lacking it were immunized twice with the OMV preparations, and the sera were analyzed for bactericidal activity and ELISA antibody titres. Total IgG antibodies against the OMVs were similar in both mouse strains. Yet the titres for IgG antibodies specific for purified OpaJ protein were significantly lower in the mice expressing human CEACAM1 than in the nontransgenic mice. No significant differences were found in bactericidal titres among the four groups. Overall, these data indicate that expression of human CEACAM1 confers a reduced Opa-specific antibody response in vivo without affecting the overall immune response against other OMV antigens.
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Affiliation(s)
- Afshin Zariri
- Institute for Translational Vaccinology (InTraVacc), Antonie van Leeuwenhoeklaan 9, 3720 AL Bilthoven, The Netherlands; Department of Infectious Diseases and Immunology, Utrecht University, 3584 CL Utrecht, The Netherlands.
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Beauchemin N, Arabzadeh A. Carcinoembryonic antigen-related cell adhesion molecules (CEACAMs) in cancer progression and metastasis. Cancer Metastasis Rev 2013; 32:643-71. [DOI: 10.1007/s10555-013-9444-6] [Citation(s) in RCA: 288] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Zhou MQ, Du Y, Liu YW, Wang YZ, He YQ, Yang CX, Wang WJ, Gao F. Clinical and experimental studies regarding the expression and diagnostic value of carcinoembryonic antigen-related cell adhesion molecule 1 in non-small-cell lung cancer. BMC Cancer 2013; 13:359. [PMID: 23885995 PMCID: PMC3728234 DOI: 10.1186/1471-2407-13-359] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Accepted: 07/22/2013] [Indexed: 01/18/2023] Open
Abstract
Background Carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1) is a multifunctional Ig-like cell adhesion molecule that has a wide range of biological functions. According to previous reports, serum CEACAM1 is dysregulated in different malignant tumours and associated with tumour progression. However, the serum CEACAM1 expression in non-small-cell lung carcinomas (NSCLC) is unclear. The different expression ratio of CEACAM1-S and CEACAM1-L isoform has seldom been investigated in NSCLC. This research is intended to study the serum CEACAM1 and the ratio of CEACAM1-S/L isoforms in NSCLC. Methods The expression of the serum CEACAM1 was determined by enzyme-linked immunosorbent assay. The protein expression and the location of CEACAM1 in tumours were observed by immunohistochemical staining. The CEACAM1 mRNA levels in tumour and normal adjacent tissues were measured using quantitative real-time PCR, and the expression patterns and the rate of CEACAM1-S and CEACAM1-L were analysed by reverse transcription-PCR. Results Serum CEACAM1 levels were significantly higher in NSCLC patients compared with that from normal healthy controls (P <0.0001). 17 patients (81%) among 21 showed high expression of CEACAM1 by immunohistochemical staining. Although no significant differences were found between tumour and normal tissues on mRNA expression levels of CEACAM1 (P >0.05), the CEACAM1-S and the CEACAM1-S/L (S: L) ratios were significantly higher in tumour than normal tissues (P <0.05). Conclusions Our data indicated that the serum levels of CEACAM1 could discriminate lung cancer patients from health donors and that CEACAM1 might be a useful marker in early diagnosis of NSCLC. Moreover, our results showed that the expression patterns of CEACAM1 isoforms could be changed during oncogenesis, even when total CEACAM1 in tumour tissues did not show significant changes. Our study suggested that the expression ratios of CEACAM1-S/CEACAM1-L might be a better diagnostic indicator in NSCLC than the quantitative changes of CEACAM1.
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Affiliation(s)
- Mu-qing Zhou
- Department of Clinical Laboratory, the Sixth People's Hospital, Shanghai Jiao-tong University School of Medicine, 600 Yi-shan Road, Shanghai 200233, People's Republic of China
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Abstract
The carcinoembryonic antigen (CEA) family comprises a large number of cellular surface molecules, the CEA-related cell adhesion molecules (CEACAMs), which belong to the Ig superfamily. CEACAMs exhibit a complex expression pattern in normal and malignant tissues. The majority of the CEACAMs are cellular adhesion molecules that are involved in a great variety of distinct cellular processes, for example in the integration of cellular responses through homo- and heterophilic adhesion and interaction with a broad selection of signal regulatory proteins, i.e., integrins or cytoskeletal components and tyrosine kinases. Moreover, expression of CEACAMs affects tumor growth, angiogenesis, cellular differentiation, immune responses, and they serve as receptors for commensal and pathogenic microbes. Recently, new insights into CEACAM structure and function became available, providing further elucidation of their kaleidoscopic functions.
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Markel G, Ortenberg R, Seidman R, Sapoznik S, Koren-Morag N, Besser MJ, Bar J, Shapira R, Kubi A, Nardini G, Tessone A, Treves AJ, Winkler E, Orenstein A, Schachter J. Systemic dysregulation of CEACAM1 in melanoma patients. Cancer Immunol Immunother 2010; 59:215-30. [PMID: 19633846 PMCID: PMC11030926 DOI: 10.1007/s00262-009-0740-5] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2009] [Accepted: 07/05/2009] [Indexed: 10/20/2022]
Abstract
It was previously shown that CEACAM1 on melanoma cells strongly predicts poor outcome. Here, we show a statistically significant increase of serum CEACAM1 in 64 active melanoma patients, as compared to 48 patients with no evidence of disease and 37 healthy donors. Among active patients, higher serum CEACAM1 correlated with LDH values and with decreased survival. Multivariate analysis with neutralization of LDH showed that increased serum CEACAM1 carries a hazard ratio of 2.40. In vitro, soluble CEACAM1 was derived from CEACAM1(+), but neither from CEACAM1(-) melanoma cells nor from CEACAM1(+) lymphocytes, and directly correlated with the number of CEACAM1(+) melanoma cells. Production of soluble CEACAM1 depended on intact de novo protein synthesis and secretion machineries, but not on metalloproteinase function. An unusually high percentage of CEACAM1(+) circulating NK and T lymphocytes was demonstrated in melanoma patients. CEACAM1 inhibited killing activity in functional assays. CEACAM1 expression could not be induced on lymphocytes by serum from patients with high CEACAM1 expression. Further, expression of other NK receptors was impaired, which collectively indicate on a general abnormality. In conclusion, the systemic dysregulation of CEACAM1 in melanoma patients further denotes the role of CEACAM1 in melanoma and may provide a basis for new tumor monitoring and prognostic platforms.
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Affiliation(s)
- Gal Markel
- The Ella Institute for Melanoma Research and Treatment, Sheba Cancer Research Center, Sheba Medical Center, 52621 Tel Hashomer, Israel.
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Abstract
The carcinoembryonic-antigen-related cell-adhesion molecule (CEACAM) family of proteins has been implicated in various intercellular-adhesion and intracellular-signalling-mediated effects that govern the growth and differentiation of normal and cancerous cells. Recent studies show that there is an important role for members of the CEACAM family in modulating the immune responses associated with infection, inflammation and cancer. In this Review, we consider the evidence for CEACAM involvement in immunity, with a particular emphasis on CEACAM1, which functions as a regulatory co-receptor for both lymphoid and myeloid cell types.
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Affiliation(s)
- Scott D Gray-Owen
- Department of Medical Genetics and Microbiology, University of Toronto, Toronto, Ontario, M5S 1A8, Canada.
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Liu T, Qian WJ, Gritsenko MA, Camp DG, Monroe ME, Moore RJ, Smith RD. Human plasma N-glycoproteome analysis by immunoaffinity subtraction, hydrazide chemistry, and mass spectrometry. J Proteome Res 2006; 4:2070-80. [PMID: 16335952 PMCID: PMC1850943 DOI: 10.1021/pr0502065] [Citation(s) in RCA: 350] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The enormous complexity, wide dynamic range of relative protein abundances of interest (over 10 orders of magnitude), and tremendous heterogeneity (due to post-translational modifications, such as glycosylation) of the human blood plasma proteome severely challenge the capabilities of existing analytical methodologies. Here, we describe an approach for broad analysis of human plasma N-glycoproteins using a combination of immunoaffinity subtraction and glycoprotein capture to reduce both the protein concentration range and the overall sample complexity. Six high-abundance plasma proteins were simultaneously removed using a pre-packed, immobilized antibody column. N-linked glycoproteins were then captured from the depleted plasma using hydrazide resin and enzymatically digested, and the bound N-linked glycopeptides were released using peptide-N-glycosidase F (PNGase F). Following strong cation exchange (SCX) fractionation, the deglycosylated peptides were analyzed by reversed-phase capillary liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS). Using stringent criteria, a total of 2053 different N-glycopeptides were confidently identified, covering 303 nonredundant N-glycoproteins. This enrichment strategy significantly improved detection and enabled identification of a number of low-abundance proteins, exemplified by interleukin-1 receptor antagonist protein (approximately 200 pg/mL), cathepsin L (approximately 1 ng/mL), and transforming growth factor beta 1 (approximately 2 ng/mL). A total of 639 N-glycosylation sites were identified, and the overall high accuracy of these glycosylation site assignments as assessed by accurate mass measurement using high-resolution liquid chromatography coupled to Fourier transform ion cyclotron resonance mass spectrometry (LC-FTICR) is initially demonstrated.
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Affiliation(s)
| | | | | | | | | | | | - Richard D. Smith
- *Address correspondence to: Dr. Richard D. Smith, Biological Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, MSIN: K8-98, Richland WA, 99352, ()
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Li SH, Lee RKK, Hsiao YL, Chen YH. Demonstration of a glycoprotein derived from the Ceacam10 gene in mouse seminal vesicle secretions. Biol Reprod 2005; 73:546-53. [PMID: 15901639 PMCID: PMC7109865 DOI: 10.1095/biolreprod.105.039651] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
CEACAM10 was purified from mouse seminal vesicle secretions by a series of purification steps that included ion exchange chromatography on a DEAE-Sephacel column and ion exchange high-performance liquid chromatography on a sulfopropyl column. It was shown to be a 36-kDa glycoprotein with an N-linked carbohydrate moiety. The circular dichromoism spectrum of CEACAM10 in 50 mM phosphate buffer at pH 7.4 appeared as one negative band arising from the β form at 217 nm. CEACAM10 was expressed predominantly in seminal vesicles of adult mice. Both CEACAM10 and its mRNA were demonstrated on the luminal epithelium of the mucosal folds in the seminal vesicle. The amount of Ceacam10 mRNA in the seminal vesicle was correlated with the stage of animal maturation. Castration of adult mice resulted in cessation of Ceacam10 expression, while treatment of castrated mice with testosterone propionate in corn oil restored Ceacam10 expression in the seminal vesicle. During the entire course of pregnancy, Ceacam10 might be silent in the embryo. A cytochemical study illustrated the presence of the CEACAM10 binding region on the entire surface of mouse sperm. CEACAM10-sperm binding greatly enhanced sperm motility in vitro.
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Affiliation(s)
- Sheng-Hsiang Li
- Department of Medical Research, Mackay Memorial Hospital, Tamshui 251, Taiwan
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Budt M, Michely B, Müller MM, Reutter W, Lucka L. Secreted CEACAM1 splice variants in rat cell lines and in vivo in rat serum. Biochem Biophys Res Commun 2002; 292:749-55. [PMID: 11922629 DOI: 10.1006/bbrc.2002.6704] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The widely expressed adhesion receptor CEACAM1 is a member of the carcinoembryonic antigen (CEA) family within the immunoglobulin (Ig) superfamily of glycoproteins. While the expression of transmembrane isoforms has been described in detail, only little is known about soluble isoforms. By RT-PCR characterization of rat pheochromocytoma PC12 and mammary adenocarcinoma MTC cell lines, two novel splice variants, designated CEACAM1-4C1 and CEACAM1-4C2, lacking the transmembrane region, were identified. In addition, we demonstrate the expression of transmembrane CEACAM1-4L and CEACAM1-4S with a truncated cytoplasmic domain. The C-termini of CEACAM1-4C2 and CEACAM1-L are identical, which allowed the specific in vitro and in vivo detection of the soluble CEACAM1-4C2 protein by an antiserum generated against the CEACAM1-L cytoplasmic part. Functionally, soluble CEACAM1 could inhibit CEACAM1-mediated aggregation of CHO cells. In conclusion, our data define a new mechanism for the appearance of functionally active rat CEACAM1 protein in body fluids.
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Affiliation(s)
- Matthias Budt
- Institut für Molekularbiologie und Biochemie, Universitätsklinikum Benjamin Franklin, Freie Universität Berlin, Arnimallee 22, D-14195 Berlin-Dahlem, Germany
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Muenzner P, Billker O, Meyer TF, Naumann M. Nuclear factor-kappa B directs carcinoembryonic antigen-related cellular adhesion molecule 1 receptor expression in Neisseria gonorrhoeae-infected epithelial cells. J Biol Chem 2002; 277:7438-46. [PMID: 11751883 DOI: 10.1074/jbc.m108135200] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The human-specific pathogen Neisseria gonorrhoeae expresses opacity-associated (Opa) protein adhesins that bind to various members of the carcinoembryonic antigen-related cellular adhesion molecule (CEACAM) family. In this study, we have analyzed the mechanism underlying N. gonorrhoeae-induced CEACAM up-regulation in epithelial cells. Epithelial cells represent the first barrier for the microbial pathogen. We therefore characterized CEACAM expression in primary human ovarian surface epithelial (HOSE) cells and found that CEACAM1-3 (L, S) and CEACAM1-4 (L, S) splice variants mediate an increased Opa(52)-dependent gonoccocal binding to HOSE cells. Up-regulation of these CEACAM molecules in HOSE cells is a direct process that takes place within 2 h postinfection and depends on close contact between microbial pathogen and HOSE cells. N. gonorrhoeae-triggered CEACAM1 up-regulation involves activation of the transcription factor nuclear factor kappaB (NF-kappaB), which translocates as a p50/p65 heterodimer into the nucleus, and an NF-kappaB-specific inhibitory peptide inhibited CEACAM1-receptor up-regulation in N. gonorrhoeae-infected HOSE cells. Bacterial lipopolysaccharides did not induce NF-kappaB and CEACAM up-regulation, which corresponds to our findings that HOSE cells do not express toll-like receptor 4. The ability of N. gonorrhoeae to up-regulate its epithelial receptor CEACAM1 through NF-kappaB suggests an important mechanism allowing efficient bacterial colonization during the initial infection process.
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Affiliation(s)
- Petra Muenzner
- Max-Planck-Institute of Infection Biology, Department of Molecular Biology, Schumannstrasse 21/22, Berlin 10117, Germany
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