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Dharan R, Sorkin R. Tetraspanin proteins in membrane remodeling processes. J Cell Sci 2024; 137:jcs261532. [PMID: 39051897 DOI: 10.1242/jcs.261532] [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: 07/27/2024] Open
Abstract
Membrane remodeling is a fundamental cellular process that is crucial for physiological functions such as signaling, membrane fusion and cell migration. Tetraspanins (TSPANs) are transmembrane proteins of central importance to membrane remodeling events. During these events, TSPANs are known to interact with themselves and other proteins and lipids; however, their mechanism of action in controlling membrane dynamics is not fully understood. Since these proteins span the membrane, membrane properties such as rigidity, curvature and tension can influence their behavior. In this Review, we summarize recent studies that explore the roles of TSPANs in membrane remodeling processes and highlight the unique structural features of TSPANs that mediate their interactions and localization. Further, we emphasize the influence of membrane curvature on TSPAN distribution and membrane domain formation and describe how these behaviors affect cellular functions. This Review provides a comprehensive perspective on the multifaceted function of TSPANs in membrane remodeling processes and can help readers to understand the intricate molecular mechanisms that govern cellular membrane dynamics.
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Affiliation(s)
- Raviv Dharan
- School of Chemistry , Raymond & Beverly Sackler Faculty of Exact Sciences , Tel Aviv University, 6997801, Tel Aviv, Israel
- Center for Physics and Chemistry of Living Systems , Tel Aviv University, 6997801, Tel Aviv, Israel
| | - Raya Sorkin
- School of Chemistry , Raymond & Beverly Sackler Faculty of Exact Sciences , Tel Aviv University, 6997801, Tel Aviv, Israel
- Center for Physics and Chemistry of Living Systems , Tel Aviv University, 6997801, Tel Aviv, Israel
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Ci H, Wu L. Expression of KAI1 and AGR2 in lung adenocarcinoma and their clinicopathological significance. Medicine (Baltimore) 2022; 101:e32498. [PMID: 36595821 PMCID: PMC9794224 DOI: 10.1097/md.0000000000032498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
OBJECTIVE Anticancer 1 (KAI1, tumor metastasis suppressor gene) and Anterior gradient-2 (AGR2, considered a valuable prognostic factor for some cancers) are associated with metastasis and prognosis of various types of human cancers. Nevertheless, the relationship between KAI1 and AGR2 in lung adenocarcinoma (LUAD) remains unclear. In this research, we analyzed the correlations between KAI1 and AGR2 in LUAD, and explored their correlations with clinicopathological parameters and overall survival time (OS) in patients with LUAD. METHODS Immunohistochemical staining was used to detect KAI1 and AGR2 expression in 132 cases of LUAD samples. At the same time, all clinicopathological parameters and postoperative survival information were collected. RESULTS AGR2 positive rate was significantly increased and KAI1 positive rate was significantly decreased in LUAD and control tissues. KAI1 positive rates were negatively correlated with tumor stage, LNM stage and TNM stage, and KAI1 subgroup positive expression of OS was significantly higher than negative KAI1 subgroup. The positive rate of AGR2 was positively correlated with tumor grade, LNM stage and TNM stage, and negatively correlated with patients OS. Active expression of AGR2 and KAI1, tumor stage, and LNM stage in multivariate analyses may be independent prognostic factors for OS in LUAD patients. CONCLUSION KAI1 and AGR2 may be potential biomarkers for prognosis and metastasis, and they are also promising therapeutic targets for LUAD patients.
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Affiliation(s)
- Hongfei Ci
- Department of Pathology, First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui Province, China
| | - Ligao Wu
- Department of Pathology, Bengbu Medical College, Bengbu, Anhui Province, China
- *Correspondence: Ligao Wu, Department of Pathology, Bengbu Medical College, Bengbu 233000, Anhui Province, China (e-mail: )
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Deng Y, Cai S, Shen J, Peng H. Tetraspanins: Novel Molecular Regulators of Gastric Cancer. Front Oncol 2021; 11:702510. [PMID: 34222025 PMCID: PMC8250138 DOI: 10.3389/fonc.2021.702510] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 06/07/2021] [Indexed: 12/11/2022] Open
Abstract
Gastric cancer is the fourth and fifth most common cancer worldwide in men and women, respectively. However, patients with an advanced stage of gastric cancer still have a poor prognosis and low overall survival rate. The tetraspanins belong to a protein superfamily with four hydrophobic transmembrane domains and 33 mammalian tetraspanins are ubiquitously distributed in various cells and tissues. They interact with other membrane proteins to form tetraspanin-enriched microdomains and serve a variety of functions including cell adhesion, invasion, motility, cell fusion, virus infection, and signal transduction. In this review, we summarize multiple utilities of tetraspanins in the progression of gastric cancer and the underlying molecular mechanisms. In general, the expression of TSPAN8, CD151, TSPAN1, and TSPAN4 is increased in gastric cancer tissues and enhance the proliferation and invasion of gastric cancer cells, while CD81, CD82, TSPAN5, TSPAN9, and TSPAN21 are downregulated and suppress gastric cancer cell growth. In terms of cell motility regulation, CD9, CD63 and CD82 are metastasis suppressors and the expression level is inversely associated with lymph node metastasis. We also review the clinicopathological significance of tetraspanins in gastric cancer including therapeutic targets, the development of drug resistance and prognosis prediction. Finally, we discuss the potential clinical value and current limitations of tetraspanins in gastric cancer treatments, and provide some guidance for future research.
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Affiliation(s)
- Yue Deng
- Department of Human Anatomy, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Sicheng Cai
- Department of Human Anatomy, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jian Shen
- Department of Pancreatic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Huiming Peng
- Department of Human Anatomy, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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He X, Ma X, Wang C, Luan M, Li Y, Huang X, Ma K. The peptide mimicking small extracellular ring domain of CD82 inhibits tumor cell migration in vitro and metastasis in vivo. J Cancer Res Clin Oncol 2021; 147:1927-1934. [PMID: 33811273 DOI: 10.1007/s00432-021-03595-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 03/11/2021] [Indexed: 12/01/2022]
Abstract
BACKGROUND Tetraspanin KAI1/CD82, a tumor metastasis suppressor, has emerged as a promising molecular target for the management of metastatic disease. However, the peptide mimicking small extracellular ring domain (EC1) of CD82 has not been fully investigated for the function of inhibiting cell migration in vitro and tumor metastasis in vivo. METHODS Different cancer cells were treated with EC1 mimic peptide in order to detect migration and invasion by the healing assay and transwell. Cell aggregation and adhesion assays were used to investigate the function of homotypic cell-cell aggregation and adhesion to tissue culture plates. Then, we established syngeneic and xenograft animal models to assess the metastasis inhibitory effect of EC1 mimic peptide in vivo. RESULTS In vitro studies, the EC1 mimic peptide had been showed to promote homotypic cell-cell aggregation, suppress cell migration, invasion and adherence in multiple tumor cell types. In vivo metastasis assays, the EC1 mimic peptide could strongly inhibit the pulmonary metastasis of LCC in syngeneic mice model and SW620 and H1299 in xenograft mice model. CONCLUSION This novel finding will improve our understanding of the mechanism by which CD82 inhibits metastasis, and suggests that EC1 mimic peptide may be a promising candidate for developing anti-metastasis drugs.
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Affiliation(s)
- Xin He
- Department of Biochemistry and Molecular Biology, Dalian Medical University, Dalian, 116044, China
| | - Xiaoguang Ma
- Department of Respirotory and Clinical Medecine, First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Congcong Wang
- Department of Biochemistry and Molecular Biology, Dalian Medical University, Dalian, 116044, China
| | - Mingchun Luan
- Department of Biochemistry and Molecular Biology, Dalian Medical University, Dalian, 116044, China
| | - Ying Li
- Department of Clinical Laboratory, Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Xiaohua Huang
- Department of Clinical Biochemistry, College of Laboratory Medicine, Dalian Medical University, Dalian, China.
| | - Keli Ma
- Department of Biochemistry and Molecular Biology, Dalian Medical University, Dalian, 116044, China.
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Role of a metastatic suppressor gene KAI1/CD82 in the diagnosis and prognosis of breast cancer. Saudi J Biol Sci 2021; 28:3391-3398. [PMID: 34121877 PMCID: PMC8176039 DOI: 10.1016/j.sjbs.2021.03.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 02/28/2021] [Accepted: 03/01/2021] [Indexed: 12/24/2022] Open
Abstract
Globally, breast cancer is the most common type of cancer in females and is one of the leading causes of cancer death in women. The advancement in the targeted therapies and the slight understanding of the molecular cascades of the disease have led to small improvement in the rate of survival of breast cancer patients. However, metastasis and resistance to the current drugs still remain as challenges in the management of breast cancer patients. Metastasis, potentially, leads to failure of the available treatment, and thereby, makes the research on metastatic suppressors a high priority. Tumor metastasis suppressors are several genes and their protein products that have the capability of arresting the metastatic process without affecting the tumor formation. The metastasis suppressors KAI1 (also known as CD82) has been found to inhibit tumor metastasis in various types of solid cancers, including breast cancer. KAI1 was identified as a metastasis suppressor that inhibits the process of metastasis by regulating several mechanisms, including cell motility and invasion, induction of cell senescence, cell–cell adhesion and apoptosis. KAI1 is a member of tetraspanin membrane protein family. It interacts with other tetraspanins, chemokines and integrins to control diverse signaling pathways, which are crucial for protein trafficking and intracellular communication. It follows that better understanding of the molecular events of such genes is needed to develop prognostic biomarkers, and to identify specific therapies for breast cancer patients. This review aims to discuss the role of KAI1/CD82 as a prognosticator in breast cancer.
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Dodla P, Bhoopalan V, Khoo SK, Miranti C, Sridhar S. Gene expression analysis of human prostate cell lines with and without tumor metastasis suppressor CD82. BMC Cancer 2020; 20:1211. [PMID: 33298014 PMCID: PMC7724878 DOI: 10.1186/s12885-020-07675-7] [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] [Received: 07/28/2020] [Accepted: 11/22/2020] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Tetraspanin CD82 is a tumor metastasis suppressor that is known to down regulate in various metastatic cancers. However, the exact mechanism by which CD82 prevents cancer metastasis is unclear. This study aims to identify genes that are regulated by CD82 in human prostate cell lines. METHODS We used whole human genome microarray to obtain gene expression profiles in a normal prostate epithelial cell line that expressed CD82 (PrEC-31) and a metastatic prostate cell line that does not express CD82 (PC3). Then, siRNA silencing was used to knock down CD82 expression in PrEC-31 while CD82 was re-expressed in PC3 to acquire differentially-expressed genes in the respective cell line. RESULTS Differentially-expressed genes with a P < 0.05 were identified in 3 data sets: PrEC-31 (+CD82) vs PrEC-31(-CD82), PC3-57 (+CD82) vs. PC3-5 V (-CD82), and PC3-29 (+CD82) vs. PC3-5 V (-CD82). Top 25 gene lists did not show overlap within the data sets, except (CALB1) the calcium binding protein calbindin 1 which was significantly up-regulated (2.8 log fold change) in PrEC-31 and PC3-29 cells that expressed CD82. Other most significantly up-regulated genes included serine peptidase inhibitor kazal type 1 (SPINK1) and polypeptide N-acetyl galactosaminyl transferase 14 (GALNT14) and most down-regulated genes included C-X-C motif chemokine ligand 14 (CXCL14), urotensin 2 (UTS2D), and fibroblast growth factor 13 (FGF13). Pathways related with cell proliferation and angiogenesis, migration and invasion, cell death, cell cycle, signal transduction, and metabolism were highly enriched in cells that lack CD82 expression. Expression of two mutually inclusive genes in top 100 gene lists of all data sets, runt-related transcription factor (RUNX3) and trefoil factor 3 (TFF3), could be validated with qRT-PCR. CONCLUSION Identification of genes and pathways regulated by CD82 in this study may provide additional insights into the role that CD82 plays in prostate tumor progression and metastasis, as well as identify potential targets for therapeutic intervention.
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Affiliation(s)
- Pushpaja Dodla
- Department of Cell and Molecular Biology, Grand Valley State University, Allendale, MI, 49401, USA
| | - Vanitha Bhoopalan
- Department of Cell and Molecular Biology, Grand Valley State University, Allendale, MI, 49401, USA
| | - Sok Kean Khoo
- Department of Cell and Molecular Biology, Grand Valley State University, Allendale, MI, 49401, USA
| | - Cindy Miranti
- Department of Cellular and Molecular Medicine, University of Arizona Cancer Center, University of Arizona, Tucson, AZ, 85724, USA
| | - Suganthi Sridhar
- Department of Integrative Biology, University of South Florida, 140, 7Th Avenue S, University of South Florida, St. Petersburg, FL, 33701, USA.
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The peptide mimicking small extracellular ring domain of CD82 inhibits epithelial-mesenchymal transition by downregulating Wnt pathway and upregulating hippo pathway. Biochem Biophys Res Commun 2020; 533:338-345. [DOI: 10.1016/j.bbrc.2020.09.041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 09/11/2020] [Accepted: 09/12/2020] [Indexed: 12/31/2022]
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CD82 Suppresses ADAM17-Dependent E-Cadherin Cleavage and Cell Migration in Prostate Cancer. DISEASE MARKERS 2020; 2020:8899924. [PMID: 33204367 PMCID: PMC7654213 DOI: 10.1155/2020/8899924] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 09/17/2020] [Accepted: 10/13/2020] [Indexed: 01/29/2023]
Abstract
CD82 acts as a tumor suppressor in a series of steps in malignant progression. Here, we identified a novel function of CD82 on posttranslational regulating E-cadherin in prostate cancer. In our study, the declined expression of CD82 was verified in prostate cancer tissues and cell lines compared with normal tissue and cell lines. Functionally, CD82 inhibited cell migration and E-cadherin cleavage from the cell membrane in prostate cancer cell. Further study proved that a disintegrin and metalloproteinase ADAM17 as an executor of E-cadherin cleavage mediated the inhibitory regulation of CD82 in E-cadherin shedding in prostate cancer. Specifically, CD82 interacted with ADAM17 and inhibited its metalloprotease activity, which led to the descent of E-cadherin shedding. These results show a nuanced but important role of CD82 in nontranscriptional regulation of E-cadherin, which may help to understand the intricate regulation of dysfunctional adhesion molecule in cancer progression.
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Li J, Xu J, Li L, Ianni A, Kumari P, Liu S, Sun P, Braun T, Tan X, Xiang R, Yue S. MGAT3-mediated glycosylation of tetraspanin CD82 at asparagine 157 suppresses ovarian cancer metastasis by inhibiting the integrin signaling pathway. Am J Cancer Res 2020; 10:6467-6482. [PMID: 32483464 PMCID: PMC7255015 DOI: 10.7150/thno.43865] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Accepted: 05/04/2020] [Indexed: 12/15/2022] Open
Abstract
Background: Tetraspanins constitute a family of transmembrane spanning proteins that function mainly by organizing the plasma membrane into micro-domains. CD82, a member of tetraspanins, is a potent inhibitor of cancer metastasis in numerous malignancies. CD82 is a highly glycosylated protein, however, it is still unknown whether and how this post-translational modification affects CD82 function and cancer metastasis. Methods: The glycosylation of CD82 profiles are checked in the paired human ovarian primary and metastatic cancer tissues. The functional studies on the various glycosylation sites of CD82 are performed in vitro and in vivo. Results: We demonstrate that CD82 glycosylation at Asn157 is necessary for CD82-mediated inhibition of ovarian cancer cells migration and metastasis in vitro and in vivo. Mechanistically, we discover that CD82 glycosylation is pivotal to disrupt integrin α5β1-mediated cellular adhesion to the abundant extracellular matrix protein fibronectin. Thereby the glycosylated CD82 inhibits the integrin signaling pathway responsible for the induction of the cytoskeleton rearrangements required for cellular migration. Furthermore, we reveal that the glycosyltransferase MGAT3 is responsible for CD82 glycosylation in ovarian cancer cells. Metastatic ovarian cancers express reduced levels of MGAT3 which in turn may result in impaired CD82 glycosylation. Conclusions: Our work implicates a pathway for ovarian cancers metastasis regulation via MGAT3 mediated glycosylation of tetraspanin CD82 at asparagine 157.
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Beyenbach KW, Schöne F, Breitsprecher LF, Tiburcy F, Furuse M, Izumi Y, Meyer H, Jonusaite S, Rodan AR, Paululat A. The septate junction protein Tetraspanin 2A is critical to the structure and function of Malpighian tubules in Drosophila melanogaster. Am J Physiol Cell Physiol 2020; 318:C1107-C1122. [PMID: 32267718 DOI: 10.1152/ajpcell.00061.2020] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Tetraspanin-2A (Tsp2A) is an integral membrane protein of smooth septate junctions in Drosophila melanogaster. To elucidate its structural and functional roles in Malpighian tubules, we used the c42-GAL4/UAS system to selectively knock down Tsp2A in principal cells of the tubule. Tsp2A localizes to smooth septate junctions (sSJ) in Malpighian tubules in a complex shared with partner proteins Snakeskin (Ssk), Mesh, and Discs large (Dlg). Knockdown of Tsp2A led to the intracellular retention of Tsp2A, Ssk, Mesh, and Dlg, gaps and widening spaces in remaining sSJ, and tumorous and cystic tubules. Elevated protein levels together with diminished V-type H+-ATPase activity in Tsp2A knockdown tubules are consistent with cell proliferation and reduced transport activity. Indeed, Malpighian tubules isolated from Tsp2A knockdown flies failed to secrete fluid in vitro. The absence of significant transepithelial voltages and resistances manifests an extremely leaky epithelium that allows secreted solutes and water to leak back to the peritubular side. The tubular failure to excrete fluid leads to extracellular volume expansion in the fly and to death within the first week of adult life. Expression of the c42-GAL4 driver begins in Malpighian tubules in the late embryo and progresses upstream to distal tubules in third instar larvae, which can explain why larvae survive Tsp2A knockdown and adults do not. Uncontrolled cell proliferation upon Tsp2A knockdown confirms the role of Tsp2A as tumor suppressor in addition to its role in sSJ structure and transepithelial transport.
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Affiliation(s)
- Klaus W Beyenbach
- Department of Zoology/Developmental Biology, University of Osnabrück, Osnabrück, Germany.,Department of Animal Physiology, University of Osnabrück, Osnabrück, Germany
| | - Frederike Schöne
- Department of Zoology/Developmental Biology, University of Osnabrück, Osnabrück, Germany
| | | | - Felix Tiburcy
- Department of Animal Physiology, University of Osnabrück, Osnabrück, Germany
| | - Mikio Furuse
- Division of Cell Structure, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Okazaki, Japan.,Department of Physiological Sciences, School of Life Science, Sokendai, The Graduate University for Advanced Studies, Okazaki, Japan
| | - Yasushi Izumi
- Division of Cell Structure, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Okazaki, Japan.,Department of Physiological Sciences, School of Life Science, Sokendai, The Graduate University for Advanced Studies, Okazaki, Japan
| | - Heiko Meyer
- Department of Zoology/Developmental Biology, University of Osnabrück, Osnabrück, Germany
| | - Sima Jonusaite
- Division of Nephrology and Hypertension, Department of Internal Medicine, Molecular Medicine Program, University of Utah, Salt Lake City, Utah.,Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada
| | - Aylin R Rodan
- Division of Nephrology and Hypertension, Department of Internal Medicine, Molecular Medicine Program, University of Utah, Salt Lake City, Utah
| | - Achim Paululat
- Department of Zoology/Developmental Biology, University of Osnabrück, Osnabrück, Germany
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Lu H, Jin LP, Huang HL, Ha SY, Yang HL, Chang RQ, Li DJ, Li MQ. Trophoblast-derived CXCL12 promotes CD56 bright CD82 - CD29 + NK cell enrichment in the decidua. Am J Reprod Immunol 2019; 83. [PMID: 31650642 DOI: 10.1111/aji.13203] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 09/22/2019] [Accepted: 10/22/2019] [Indexed: 01/04/2023] Open
Abstract
PROBLEM Decidual natural killer (dNK) cells play key roles in maternal-fetal immune regulation, trophoblast invasion, and vascular remodeling, and most dNK cell populations are CD56bright CD16- NK cells. However, the enrichment and redistribution of dNK cells in the local decidua have not been clarified yet. METHOD OF STUDY A total of 45 women with normal pregnancies and 8 unexplained recurrent spontaneous abortion (RSA) patients were included. We isolated primary human dNK (n = 53) and peripheral blood NK (pNK) cells (n = 5) from specimen and analyzed CD56, CD82, and CD29 by flow cytometry (FCM). We assessed their adhesion ability by cell counts of NK cells adhered to decidual stromal cells (DSCs) in a co-culture system. RESULTS We found that RSA patients had more CD56dim dNK cells with lower CD82 and higher CD29 than women with normal pregnancies. There were negative correlations of CD82 to CD29 on CD56dim and CD56+ dNK cells. In normal pregnancies, dNK cells had lower CD82 and higher CD29 expression with a stronger adhesion ability than pNK cells. Blocking CD82 on dNK cells increased the adhesive ability and CD29 expression, while blocking CD29 decreased the adhesive ability. Co-culturing dNK cells with trophoblast cells decreased CD82 expression and increased the adhesive ability of dNK cells and the percentage of CD56bright NK cells, while blocking trophoblast-derived CXCL12 increased CD82 expression, decreased CD29 expression, and impaired the adhesive ability of NK cells. CONCLUSION Trophoblast cells enhance the adhesive ability of NK cells to DSCs via the CXCL12/CD82/CD29 signaling pathway and contribute to CD56bright NK cell enrichment in the uterus.
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Affiliation(s)
- Han Lu
- NHC Key Lab of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Hospital of Obstetrics and Gynecology, Fudan University, Shanghai, China.,Institute of Obstetrics and Gynecology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai, China
| | - Li-Ping Jin
- Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
| | - Hong-Lan Huang
- Institute of Obstetrics and Gynecology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai, China
| | - Si-Yao Ha
- Institute of Obstetrics and Gynecology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai, China
| | - Hui-Li Yang
- Institute of Obstetrics and Gynecology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai, China
| | - Rui-Qi Chang
- Institute of Obstetrics and Gynecology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai, China
| | - Da-Jin Li
- NHC Key Lab of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Hospital of Obstetrics and Gynecology, Fudan University, Shanghai, China.,Institute of Obstetrics and Gynecology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai, China
| | - Ming-Qing Li
- NHC Key Lab of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Hospital of Obstetrics and Gynecology, Fudan University, Shanghai, China.,Institute of Obstetrics and Gynecology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai, China.,Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai, China
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Jiang X, Teng M, Ji R, Zhang D, Zhang Z, Lv Y, Zhang Q, Zhang J, Huang Y. CD9 regulates keratinocyte differentiation and motility by recruiting E-cadherin to the plasma membrane and activating the PI3K/Akt pathway. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2019; 1867:118574. [PMID: 31682865 DOI: 10.1016/j.bbamcr.2019.118574] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 10/20/2019] [Accepted: 10/27/2019] [Indexed: 11/16/2022]
Abstract
During keratinocyte stratification and wound healing, keratinocytes undergo a switch between differentiation and motility. However, limited knowledge exists on the mechanisms of the switch. We have previously demonstrated that the expression of CD9 was changed in different wound stages and involved in the regulation of keratinocyte migration. In this study, we showed that CD9 expression was increased in both human and mouse keratinocytes undergoing differentiation. CD9 overexpression in keratinocytes stimulated terminal differentiation and reduced cell motility. CD9 silencing inhibited calcium-induced keratinocyte differentiation and increased cell motility. Furthermore, CD9 overexpression recruited E-cadherin to the plasma membrane and subsequently activated PI3K/Akt signaling, while CD9 knockdown inhibited the recruitment of E-cadherin to the plasma membrane and PI3K/Akt activation. Importantly, silencing E-cadherin expression or inhibiting PI3K/Akt signaling reversed CD9 overexpression-induced differentiation and -reduced motility. These results demonstrate that CD9 acts as an important node that regulates keratinocyte differentiation and motility. The recruitment of E-cadherin to the plasma membrane and activation of the PI3K/Akt signaling pathway mediated by CD9 play an important role in these processes.
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Affiliation(s)
- Xupin Jiang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Miao Teng
- Department of Burn and Plastic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Ran Ji
- Department of Burn and Plastic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Dongxia Zhang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Ze Zhang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Yanling Lv
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Qiong Zhang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Jiaping Zhang
- Department of Plastic Surgery, State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China.
| | - Yuesheng Huang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China; Institute of Burn Research, Affiliated Hospital of Jiangnan University, China.
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Krishna Latha T, Verma A, Thakur GK, Banerjee B, Kaur N, Singh UR, Sharma S. Down Regulation of KAI1/CD82 in Lymph Node Positive and Advanced T-Stage Group in Breast Cancer Patients. Asian Pac J Cancer Prev 2019; 20:3321-3329. [PMID: 31759355 PMCID: PMC7063004 DOI: 10.31557/apjcp.2019.20.11.3321] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Metastasis represents a deadly aspect of any cancer including breast cancer, given its high prevalence; treatment of metastatic breast cancer remains a clinically unmet need, which necessitates the exploration of metastasis suppressor genes (MSGs). KAI-1/CD82 is an important member of MSGs; the role of KAI1 has been well explored in prostate cancer, however its role in breast cancer is not fully explored and in fact the results of breast cancer studies are contentious. Thus, the present study aimed to investigate expression of KAI1 at both transcriptional and translational levels in the tissue of breast cancer patients and benign breast disease. Further, we analysed the relationship between expression levels of KAI1 and clinicopathological parameters in breast cancer patients. MATERIALS AND METHODS mRNA expression was studied by Real time PCR and protein expression was analyzed by both Western blot and Immunohistochemistry. RESULTS The results of the study indicate that KAI1 expression was remarkably decreased in breast cancer both at the gene and the protein levels (P < 0.05) compared to benign breast disease. In addition, KAI1 expression levels were strongly associated with axillary lymph node status and advanced T stage (p < 0.05), however no association was found with tumor grade, age, menopausal status and receptor status like ER, PR and Her2. CONCLUSION Low expression of KAI1 might be helpful for predicting the lymph node metastasis and T staging, thus predicts malignant prognosis of breast cancer.<br />.
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Affiliation(s)
- Thammineni Krishna Latha
- Department of Biochemistry University College of Medical Sciences and GTB Hospital , University of Delhi, Dilshad Garden, Delhi, India
| | - Ankur Verma
- Department of Pathology, University College of Medical Sciences and GTB Hospital , University of Delhi, Dilshad Garden, Delhi, India
| | - Gaurav Kumar Thakur
- Department of Biochemistry University College of Medical Sciences and GTB Hospital , University of Delhi, Dilshad Garden, Delhi, India
| | - Basudev Banerjee
- Department of Biochemistry University College of Medical Sciences and GTB Hospital , University of Delhi, Dilshad Garden, Delhi, India
| | - Navneet Kaur
- Department of Surgery, University College of Medical Sciences and GTB Hospital , University of Delhi, Dilshad Garden, Delhi, India
| | - Usha Rani Singh
- Department of Pathology, University College of Medical Sciences and GTB Hospital , University of Delhi, Dilshad Garden, Delhi, India
| | - Sonal Sharma
- Department of Pathology, University College of Medical Sciences and GTB Hospital , University of Delhi, Dilshad Garden, Delhi, India
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Gong Y, Wang D, Lin L, Dai J, Yu L. The expression of ubiquitin-conjugating enzyme E2C and KAI1 in ovarian carcinoma and their clinical significance. Medicine (Baltimore) 2019; 98:e17896. [PMID: 31725636 PMCID: PMC6867754 DOI: 10.1097/md.0000000000017896] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Ubiquitin-conjugating enzyme E2C (UBE2C) is considered to play an important role in the tumorigenesis of many cancers and promote cell cycle progression. Kangai 1 (KAI1) is considered as a suppressor gene of tumor metastasis. However, the clinicopathological significance and their each relationship of UBE2C and KAI1 in epithelial ovarian carcinoma (EOC) are not widely reported. The purpose of this study is to detect the expression of UBE2C and KAI1 in EOC and their clinical significance.The expression of UBE2C and KAI1 in 180 cases of EOC tissues, 60 cases of normal ovarian epithelial tissues, and 60 cases of ovarian benign tumor tissues were detected by immunohistochemistry. Patients data were also collected.Positive expression of UBE2C in EOC (38.9%) was significantly higher than that both in the normal group (0%) and benign tumors group (10.0%). Furthermore, the expression of UBE2C was positively associated with grades of differentiation, implants, lymph node metastasis (LNM), as well as the International Federation of Gynecology and Obstetrics (FIGO) stages. Positive expression of KAI1 in EOC (25.0%) was significantly lower than that both in the normal group (100%) and benign tumors group (75.0%). And the expression of KAI1 was inversely associated with grades of differentiation, implants, LNM, and FIGO stages. Kaplan-Meier survival analyses demonstrated that UBE2C positive expression for patients with EOC had unfavorably overall survival (OS) time when compared with negative UBE2C for patients. And KAI1 positive expression for patients had favorably OS time when compared with negative KAI1 for patients. Multivariate analysis showed that positive expression of UBE2C and KAI1, implants, and FIGO stages were considered as independently prognostic factors for OS in patients with EOC. Moreover, UBE2C expression was significantly higher in high grade serous adenocarcinoma (SA) when compared with low grade SA; and KAI1 expression was significantly lower in high grade SA when compared with low grade SA. High grade SA patients had higher rates of implants, LNM, and high FIGO stages when compared with low grade SA. High grade SA patients had unfavorably OS time when compared with low grade SA.UBE2C and KAI1 should be considered as potential biomarkers of EOC prognosis.
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Affiliation(s)
| | - Danna Wang
- Department of Pathology, The First Affiliated Hospital of Bengbu Medical University
- Department of Pathology, Bengbu Medical University, Anhui, China
| | - Lu Lin
- Department of Gynaecology and Obstetrics
| | - Junjun Dai
- Department of Gynaecology and Obstetrics
| | - Lan Yu
- Department of Pathology, The First Affiliated Hospital of Bengbu Medical University
- Department of Pathology, Bengbu Medical University, Anhui, China
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Liu X, Guo XZ, Li HY, Chen J. KAI1 reverses the epithelial-mesenchymal transition in human pancreatic cancer cells. Hepatobiliary Pancreat Dis Int 2019; 18:471-477. [PMID: 30948327 DOI: 10.1016/j.hbpd.2019.03.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 03/21/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Epithelial-mesenchymal transition (EMT) plays an important role in pancreatic cancer (PC). In the present study, we investigated the effects of KAI1 gene overexpression on the EMT of human PC cell lines, MIA PaCa-2 and PACN-1. METHODS Plasmids overexpressing KAI1 and pCMV were transfected into MIA PaCa-2 and PACN-1 cells, respectively. After selection of differently transfected cells by G418, KAI1 protein levels were examined by Western blotting, and transfected cells were renamed as MIA PaCa-2-K, MIA PaCa-2-p, PACN-1-K and PACN-1-p. Wound healing and Transwell migration assays were then performed comparing the two groups of cells. EMT-related markers were analyzed by Western blotting. RESULTS The percentage of wound closure significantly decreased in MIA PaCa-2-K cells compared with MIA PaCa-2-p and MIA PaCa-2 cells after 24, 48 and 72 h (P < 0.05). In PACN-1-K cells, the percentage of wound closure significantly decreased as well (P < 0.05). Numbers of invading MIA PaCa-2, MIA PaCa-2-p and MIA PaCa-2-K cells were determined as 48.0 ± 15.4, 50.0 ± 12.4, and 12.0 ± 3.8, respectively. The corresponding numbers of invading PACN-1, PACN-1-p and PACN-1-K cells were 29.0 ± 10.6, 31.0 ± 11.4, and 8.0 ± 4.2, respectively. KAI1 overexpression induced a significant upregulation of E-cadherin and also significant downregulation of Snail, vimentin, matrix metalloproteinase 2 (MMP2) and MMP9 (all P < 0.05) in PC cells. CONCLUSIONS KAI1 reversed EMT-related marker expression and inhibited migration and invasion of PC cells. Thus, KAI1 might represent a novel potential therapeutic target for PC.
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Affiliation(s)
- Xu Liu
- Department of Gastroenterology, General Hospital of Shenyang Military Area, 83 Wenhua Road, Shenyang 110840, China
| | - Xiao-Zhong Guo
- Department of Gastroenterology, General Hospital of Shenyang Military Area, 83 Wenhua Road, Shenyang 110840, China.
| | - Hong-Yu Li
- Department of Gastroenterology, General Hospital of Shenyang Military Area, 83 Wenhua Road, Shenyang 110840, China
| | - Jiang Chen
- Department of Gastroenterology, General Hospital of Shenyang Military Area, 83 Wenhua Road, Shenyang 110840, China
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El Kharbili M, Agaësse G, Barbollat-Boutrand L, Pommier RM, de la Fouchardière A, Larue L, Caramel J, Puisieux A, Berthier-Vergnes O, Masse I. Tspan8-β-catenin positive feedback loop promotes melanoma invasion. Oncogene 2019; 38:3781-3793. [PMID: 30679790 DOI: 10.1038/s41388-019-0691-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 12/19/2018] [Accepted: 12/27/2018] [Indexed: 01/14/2023]
Abstract
Due to its high proclivity to metastasize, and despite the recent development of targeted and immune therapy strategies, melanoma is still the deadliest form of skin cancer. Therefore, understanding the molecular mechanisms underlying melanoma invasion remains crucial. We previously characterized Tspan8 for its ability to prompt melanoma cell detachment from their microenvironment and trigger melanoma cell invasiveness, but the signaling events by which Tspan8 regulates the invasion process still remain unknown. Here, we demonstrated that β-catenin stabilization is a molecular signal subsequent to the onset of Tspan8 expression, and that, in turn, β-catenin triggers the direct transcriptional activation of Tspan8 expression, leading to melanoma invasion. Moreover, we showed that β-catenin activation systematically correlates with a high expression of Tspan8 protein in melanoma lesions from transgenic Nras; bcat* mice, as well as in deep penetrating naevi, a type of human pre-melanoma neoplasm characterized by a combined activation of β-catenin and MAP kinase signaling. Overall, our data suggest that β-catenin and Tspan8 are part of a positive feedback loop, which sustains a high Tspan8 expression level, conferring to melanoma cells the invasive properties required for tumor progression and dissemination.
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Affiliation(s)
- Manale El Kharbili
- Université de Lyon, F-69003, Lyon, France
- Université Lyon 1, Lyon, F-69003, France
- CNRS, UMR5534, Centre de Génétique et de Physiologie Moléculaires et Cellulaires, Villeurbanne, F-69622, France
- Department of Dermatology, University of Colorado Anschutz Medical Campus, 12800 E. 19th Avenue, P18-8132, Aurora, CO, 80045, USA
| | - Gweltaz Agaësse
- Université de Lyon, F-69003, Lyon, France
- Université Lyon 1, Lyon, F-69003, France
- CNRS, UMR5534, Centre de Génétique et de Physiologie Moléculaires et Cellulaires, Villeurbanne, F-69622, France
| | - Laetitia Barbollat-Boutrand
- Université de Lyon, F-69003, Lyon, France
- Université Lyon 1, Lyon, F-69003, France
- CNRS, UMR5534, Centre de Génétique et de Physiologie Moléculaires et Cellulaires, Villeurbanne, F-69622, France
- Centre de Recherche en Cancérologie de Lyon, CNRS UMR5286, Inserm U1052, Université de Lyon, Université Lyon 1, 69000, Lyon, France
| | - Roxane M Pommier
- Centre de Recherche en Cancérologie de Lyon, CNRS UMR5286, Inserm U1052, Université de Lyon, Université Lyon 1, 69000, Lyon, France
| | - Arnaud de la Fouchardière
- Centre de Recherche en Cancérologie de Lyon, CNRS UMR5286, Inserm U1052, Université de Lyon, Université Lyon 1, 69000, Lyon, France
- Département de Biopathologie, Centre Leon Bérard, Lyon, France
| | - Lionel Larue
- Institut Curie, PSL Research University, INSERM U1021, Normal and Pathological Development of Melanocytes, Orsay, France
- Univ Paris-Sud, Univ Paris-Saclay, CNRS UMR 3347, Orsay, France
- Equipe Labellisée Ligue Contre le Cancer, Orsay, France
| | - Julie Caramel
- Centre de Recherche en Cancérologie de Lyon, CNRS UMR5286, Inserm U1052, Université de Lyon, Université Lyon 1, 69000, Lyon, France
| | - Alain Puisieux
- Centre de Recherche en Cancérologie de Lyon, CNRS UMR5286, Inserm U1052, Université de Lyon, Université Lyon 1, 69000, Lyon, France
| | - Odile Berthier-Vergnes
- Université de Lyon, F-69003, Lyon, France
- Université Lyon 1, Lyon, F-69003, France
- CNRS, UMR5534, Centre de Génétique et de Physiologie Moléculaires et Cellulaires, Villeurbanne, F-69622, France
| | - Ingrid Masse
- Université de Lyon, F-69003, Lyon, France.
- Université Lyon 1, Lyon, F-69003, France.
- CNRS, UMR5534, Centre de Génétique et de Physiologie Moléculaires et Cellulaires, Villeurbanne, F-69622, France.
- Centre de Recherche en Cancérologie de Lyon, CNRS UMR5286, Inserm U1052, Université de Lyon, Université Lyon 1, 69000, Lyon, France.
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Lee MS, Byun HJ, Lee J, Jeoung DI, Kim YM, Lee H. Tetraspanin CD82 represses Sp1-mediated Snail expression and the resultant E-cadherin expression interrupts nuclear signaling of β-catenin by increasing its membrane localization. Cell Signal 2018; 52:83-94. [PMID: 30189244 DOI: 10.1016/j.cellsig.2018.09.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 08/21/2018] [Accepted: 09/01/2018] [Indexed: 11/20/2022]
Abstract
Tetraspanin membrane proteins form physical complexes with signaling molecules and have been suggested to influence the signaling events of associated molecules. Of the tetraspanin proteins, CD82 has been shown to promote homotypic cell-cell adhesion, which partially accounts for its role in suppressing cancer invasion and metastasis. We found here that CD82-induced cell-cell adhesion is attributed to increased E-cadherin expression through CD82-mediated downregulation of the E-cadherin repressor Snail. The Snail repression by CD82 resulted from the reduced binding of the Sp1 transcription factor to the Snail gene promoter. Notably, high CD82 expression did not allow the fibronectin matrix to induce Sp1 phosphorylation, implicating CD82 inhibition of the fibronectin-integrin signaling-dependent Sp1 activation. Meanwhile, E-cadherin upregulated by CD82 pulled β-catenin up to the membrane region, and consequently reduced the amount of cytoplasmic β-catenin that was able to move into to the nucleus. The Wnt signal-induced nuclear translocation of β-catenin was also inhibited by the CD82 function of upregulating E-cadherin. Overall, high CD82 expression was likely to suppress fibronectin adhesion-induced Sp1 activation signaling for Snail expression, resulting in continuous E-cadherin expression, which contributed not only to the maintenance of strong cell-cell adhesion but also to the blockage of nuclear β-catenin signaling.
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Affiliation(s)
- Moon-Sung Lee
- BIT Medical Convergence Graduate Program, Kangwon National University, Chunchon, Kangwon-do, 24341, Republic of Korea
| | - Hee-Jung Byun
- Department of Biological Sciences, Kangwon National University, Chunchon, Kangwon-do, 24341, Republic of Korea
| | - Jaeseob Lee
- Department of Biological Sciences, Kangwon National University, Chunchon, Kangwon-do, 24341, Republic of Korea
| | - Doo-Il Jeoung
- Department of Biochemistry, College of Natural Sciences, Kangwon National University, Chunchon, Kangwon-do, 24341, Republic of Korea
| | - Young-Myeong Kim
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chunchon, Kangwon-do, 24341, Republic of Korea
| | - Hansoo Lee
- BIT Medical Convergence Graduate Program, Kangwon National University, Chunchon, Kangwon-do, 24341, Republic of Korea; Department of Biological Sciences, Kangwon National University, Chunchon, Kangwon-do, 24341, Republic of Korea.
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Transfection of T-Box Transcription Factor BRACHYURY and SOX2 Synergistically Promote Self-Renewal and Invasive Phenotype in Oral Cancer Cells. Int J Mol Sci 2018; 19:ijms19113620. [PMID: 30453543 PMCID: PMC6275038 DOI: 10.3390/ijms19113620] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 11/06/2018] [Accepted: 11/08/2018] [Indexed: 12/12/2022] Open
Abstract
Recent studies suggest that epithelial–mesenchymal transition (EMT) correlates with cancer metastasis. In addition, there is growing evidence of the association of EMT with cancer stem cells (CSCs). Recently, we showed that the T-box transcription factor BRACHYURY could be a strong regulator of EMT and the CSC phenotype, which were effectively suppressed by a BRACHYURY knockdown in an adenoid cystic carcinoma cell line. In this study, we further tested whether BRACHYURY is a regulator of cancer stemness by means of forced expression of BRACHYURY in oral cancer cell lines. BRACHYURY, SOX2, or both were stably transfected into oral carcinoma cell lines. We analysed these transfectants with respect to self-renewal phenotypes using a sphere-formation assay, and we assessed the expression levels of EMT markers and stem cell markers using real-time reverse transcription-polymerase chain reaction (RT-PCR). Cell migration and invasiveness in vitro were evaluated using a wound healing assay and a tumour cell dissemination assay, respectively. Forced expression of BRACHYURY or SOX2 slightly increased expression of EMT and stem cell markers and the self-renewal phenotype. The expression levels, however, were much lower compared to those of cancer stem cell-like cells. Forced co-expression of BRACHYURY and SOX2 strongly upregulated EMT and stem cell markers and the self-renewal phenotype. Cell migration and invasiveness in vitro were also remarkably enhanced. These synergistic effects increased expression levels of FIBRONECTIN, SNAIL, SLUG, ZEB1, and TGF-β2. In particular, the effects on FIBRONECTIN and TGF-β2 were significant. We found that BRACHYURY and SOX2 synergistically promote cancer stemness in oral cancer cells. This finding points to the importance of gene or protein networks associated with BRACHYURY and SOX2 in the development and maintenance of the CSC phenotype.
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Alternative splicing is an important mechanism behind KAI1 loss of function in breast cancer patients from Saudi Arabia. Breast Cancer Res Treat 2018; 173:87-91. [PMID: 30306427 DOI: 10.1007/s10549-018-4999-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 10/08/2018] [Indexed: 10/28/2022]
Abstract
PURPOSE KAI1 (also called CD82) is a metastasis suppressor gene known to be downregulated in breast cancer and other solid tumors. The downregulation of KAI1 or loss of its function is usually associated with bad prognosis. The mechanism behind KAI1 loss of function is complex. In this study, we investigated "alternative splicing" as a possible mechanism that underlies KAI1 loss of function in breast cancer patients from a tertiary hospital in Saudi Arabia. METHODS Expression of KAI1 was studied in FFPE breast cancer and control tissue sections by IHC using two different antibodies targeting different domains of the protein. The TS82B antibody targets the extracellular loop, which constitutes most of the protein, while the second EPR4112 antibody targets the C-terminal intracellular domain of the protein. RESULTS Out of 90 breast cancer samples, 67% showed loss of KAI1 expression. The remaining 33% showed KAI1 expression with (TS82B) antibody; however, the protein was detected in only 11% of cancers when using the antibody (EPR4112) indicating a truncation of the protein at the C-terminus (truncated-KAI1) in 22% of the studied cancer samples. A significant correlation was found between truncated-KAI1 expression and advanced cancer stage (association with lymph node metastasis, P value 0.008). CONCLUSION Alternative splicing is an important mechanism underlying KAI1 loss of function in breast cancer, and it is associated with bad prognosis (advanced cancer stage).
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Liprin-α1 modulates cancer cell signaling by transmembrane protein CD82 in adhesive membrane domains linked to cytoskeleton. Cell Commun Signal 2018; 16:41. [PMID: 30005669 PMCID: PMC6045882 DOI: 10.1186/s12964-018-0253-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 07/10/2018] [Indexed: 12/26/2022] Open
Abstract
Background PPFIA1 is located at the 11q13 region commonly amplified in cancer. The protein liprin-α1 encoded by PPF1A1 contributes to the adhesive and invasive structures of cytoskeletal elements and is located at the invadosomes in cancer cells. However, the precise mechanism of liprin-α1 function in cancer progression has remained elusive. Methods Invasion regulating activity of liprin-α1 was examined by analyzing the functions of squamous cell carcinoma of head and neck (HNSCC) cell lines in three-dimensional collagen I after RNAi mediated gene knockdown. Transcriptome profiling and Gene Set Enrichment Analysis from HNSCC and breast cancer cells were used to identify expression changes relevant to specific cellular localizations, biological processes and signaling pathways after PPFIA1 knockdown. The significance of the results was assessed by relevant statistical methods (Wald and Benjamini-Hochberg). Localization of proteins associated to liprin-α1 was studied by immunofluorescence in 2D and 3D conditions. The association of PPFIA1 amplification to HNSCC patient survival was explored using The Cancer Genome Atlas data. Results In this study, we show that liprin-α1 regulates biological processes related to membrane microdomains in breast carcinoma, as well as protein trafficking, cell-cell and cell-substrate contacts in HNSCC cell lines cultured in three-dimensional matrix. Importantly, we show that in all these cancer cells liprin-α1 knockdown leads to the upregulation of transmembrane protein CD82, which is a suppressor of metastasis in several solid tumors. Conclusions Our results provide novel information regarding the function of liprin-α1 in biological processes essential in cancer progression. The results reveal liprin-α1 as a novel regulator of CD82, linking liprin-α1 to the cancer cell invasion and metastasis pathways. Electronic supplementary material The online version of this article (10.1186/s12964-018-0253-y) contains supplementary material, which is available to authorized users.
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Eldawud R, Wagner A, Dong C, Stueckle TA, Rojanasakul Y, Dinu CZ. Carbon nanotubes physicochemical properties influence the overall cellular behavior and fate. NANOIMPACT 2018; 9:72-84. [PMID: 31544167 PMCID: PMC6753956 DOI: 10.1016/j.impact.2017.10.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The unique properties of single walled carbon nanotubes (SWCNTs) make them viable candidates for versatile implementation in the next generation of biomedical devices for targeted delivery of chemotherapeutic agents or cellular-sensing probes. Such implementation requires user-tailored changes in SWCNT's physicochemical characteristics to allow for efficient cellular integration while maintaining nanotubes' functionality. However, isolated reports showed that user-tailoring could induce deleterious effects in exposed cells, from decrease in cellular proliferation, to changes in cellular adhesion, generation of reactive oxygen species or phenotypical variations, just to name a few. Before full implementation of SWCNTs is achieved, their toxicological profiles need to be mechanistically correlated with their physicochemical properties to determine how the induced cellular fate is related to the exposure conditions or samples' characteristics. Our study provides a comprehensive analysis of the synergistic cyto- and genotoxic effects resulted from short-term exposure of human lung epithelial cells to pristine (as manufactured) and user-tailored SWCNTs, as a function of their physicochemical properties. Specifically, through a systematic approach we are correlating the nanotube uptake and nanotube-induced cellular changes to the sample's physicochemical characteristics (e.g., metal impurities, length, agglomerate size, surface area, dispersion, and surface functionalization). By identifying changes in active hallmarks involved in cell-cell connections and maintaining epithelial layer integrity, we also determine the role that short-term exposure to SWCNTs plays in the overall cellular fate and cellular transformation. Lastly, we assess cellular structure-function relationships to identify non-apoptotic pathways induced by SWCNTs exposure that could however lead to changes in cellular behavior and cellular transformation. Our results show that the degree of cell transformation is a function of the physicochemical properties of the SWCNT, with the nanotube with higher length, higher metal content and larger agglomerate size reducing cell viability to a larger extent. Such changes in cell viability are also complemented by changes in cell structure, cycle and cell-cell interactions, all responsible for maintaining cell fate.
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Affiliation(s)
- Reem Eldawud
- Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, WV 26506, USA
| | - Alixandra Wagner
- Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, WV 26506, USA
| | - Chenbo Dong
- Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, WV 26506, USA
| | - Todd A. Stueckle
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
| | - Yon Rojanasakul
- Department of Pharmaceutical Sciences, West Virginia University, WV 26506, USA
| | - Cerasela Zoica Dinu
- Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, WV 26506, USA
- Department of Pharmaceutical Sciences, West Virginia University, WV 26506, USA
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Bae WK, Hong CS, Park MR, Sun EG, Lee JH, Kang K, Ryu KH, Shim HJ, Hwang JE, Cho SH, Chung IJ. TAp73 inhibits cell invasion and migration by directly activating KAI1 expression in colorectal carcinoma. Cancer Lett 2017; 415:106-116. [PMID: 29222041 DOI: 10.1016/j.canlet.2017.12.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 11/24/2017] [Accepted: 12/02/2017] [Indexed: 01/23/2023]
Abstract
p73 is a member of the p53 family of transcription factors and, like p53, plays a role as a tumor suppressor. p73 is involved in development, proliferation, apoptosis and metastasis. However, the precise molecular mechanisms underlying its function in inhibiting metastasis remain largely unknown. Here, we show that induction of TAp73 decreased invasion and migration activity of colorectal cancer cells, whereas knockdown of TAp73 led to increased invasion and migration activity. KAI1 was identified as a transcriptional target of TAp73 and its expression is indispensable for TAp73-mediated inhibition of cell invasion and migration. Furthermore, induction of TAp73 in colorectal cancer cells elevated KAI1 expression and decreased the frequency of hepatic metastasis in vivo. Whereas, the decreased invasion and migration activities caused by TAp73 induction were abrogated by knockdown of KAI1. Interestingly, TAp73 and KAI1 are overexpressed in primary colorectal cancers and a significant correlation between TAp73 and KAI1 expression was detected, but their expressions were significantly down-regulated in metastatic cancers. Taken together, our results support a novel role for TAp73 in controlling colorectal cancer cell invasion, migration and metastasis by regulating transcription of KAI1.
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Affiliation(s)
- Woo-Kyun Bae
- Department of Hemato-Oncology, Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - Chang-Soo Hong
- Department of Hemato-Oncology, Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - Mi-Ra Park
- Department of Hemato-Oncology, Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - Eun-Gene Sun
- Department of Hemato-Oncology, Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - Ji-Hee Lee
- Department of Hemato-Oncology, Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - Keunsoo Kang
- Department of Microbiology, Dankook University, Cheonan, South Korea
| | - Kyung-Hyun Ryu
- Department of Biological Science, Sookmyung Women's University, Seoul, South Korea
| | - Hyun-Jeong Shim
- Department of Hemato-Oncology, Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - Jun-Eul Hwang
- Department of Hemato-Oncology, Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - Sang-Hee Cho
- Department of Hemato-Oncology, Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - Ik-Joo Chung
- Department of Hemato-Oncology, Chonnam National University Hwasun Hospital, Hwasun, South Korea.
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Nishioka C, Ikezoe T, Pan B, Xu K, Yokoyama A. MicroRNA-9 plays a role in interleukin-10-mediated expression of E-cadherin in acute myelogenous leukemia cells. Cancer Sci 2017; 108:685-695. [PMID: 28107581 PMCID: PMC5406602 DOI: 10.1111/cas.13170] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 01/06/2017] [Accepted: 01/14/2017] [Indexed: 12/22/2022] Open
Abstract
We previously showed that the CD82/signal transducer and activator of transcription/interleukin-10 (IL-10) axis is activated in CD34+ /CD38- AML cells that favor the bone marrow microenvironment. The present study explored the novel biological function of IL-10 in regulation of expression of adhesion molecules in AML cells and found that exposing AML cells to IL-10 induced expression of E-cadherin, but not other adhesion molecules, including VLA4, CD29, and LFA1. Downregulation of E-cadherin with an siRNA suppressed the adhesion of leukemia cells to bone marrow-derived mesenchymal stem cells and enhanced the anti-leukemia effect of cytarabine. A microRNA (miRNA) database search identified an miR-9 as a candidate miRNA binding onto the 3'-UTR of E-cadherin and regulating its expression. Notably, treatment of leukemia cells with IL-10 decreased miR-9 expression through hypermethylation of the miR-9 CpG islands. In addition, downregulation of DNA methyltransferase 3A by siRNAs decreased E-cadherin expression in parallel with an increase in levels of miR-9 in leukemia cells. Notably, short hairpin RNA-mediated IL-10 downregulation impaired engraftment of human AML cells and enhanced the anti-leukemia effect of cytarabine in conjunction with miR-9 upregulation and E-cadherin downregulation in a human AML xenograft model. Taken together, the IL-10/E-cadherin axis may be a promising therapeutic target for treating AML.
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MESH Headings
- 3' Untranslated Regions/genetics
- Acute Disease
- Animals
- Antimetabolites, Antineoplastic/pharmacology
- Blotting, Western
- Cadherins/genetics
- Cadherins/metabolism
- Cell Adhesion/drug effects
- Cell Adhesion/genetics
- Cell Line, Tumor
- Cells, Cultured
- CpG Islands/genetics
- Cytarabine/pharmacology
- DNA (Cytosine-5-)-Methyltransferases/genetics
- DNA (Cytosine-5-)-Methyltransferases/metabolism
- DNA Methylation/drug effects
- DNA Methyltransferase 3A
- Gene Expression Regulation, Leukemic/drug effects
- Humans
- Interleukin-10/pharmacology
- Leukemia, Myeloid/drug therapy
- Leukemia, Myeloid/genetics
- Leukemia, Myeloid/pathology
- Mesenchymal Stem Cells/drug effects
- Mesenchymal Stem Cells/metabolism
- Mice, Inbred NOD
- Mice, Knockout
- MicroRNAs/genetics
- RNA Interference
- Reverse Transcriptase Polymerase Chain Reaction
- Survival Analysis
- Xenograft Model Antitumor Assays
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Affiliation(s)
- Chie Nishioka
- Department of Hematology and Respiratory MedicineKochi Medical SchoolKochi UniversityNankokuJapan
- Department of ImmunologyKochi Medical SchoolKochi UniversityNankokuJapan
| | - Takayuki Ikezoe
- Department of Hematology and Respiratory MedicineKochi Medical SchoolKochi UniversityNankokuJapan
- Department of HematologyFukushima Medical UniversityFukushimaJapan
| | - Bin Pan
- Department of Hematology and Respiratory MedicineKochi Medical SchoolKochi UniversityNankokuJapan
- Department of HematologyFukushima Medical UniversityFukushimaJapan
- Department of HematologyThe Affiliated Hospital of Xuzhou Medical CollegeXuzhouChina
| | - Kailin Xu
- Department of HematologyThe Affiliated Hospital of Xuzhou Medical CollegeXuzhouChina
| | - Akihito Yokoyama
- Department of Hematology and Respiratory MedicineKochi Medical SchoolKochi UniversityNankokuJapan
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Termini CM, Gillette JM. Tetraspanins Function as Regulators of Cellular Signaling. Front Cell Dev Biol 2017; 5:34. [PMID: 28428953 PMCID: PMC5382171 DOI: 10.3389/fcell.2017.00034] [Citation(s) in RCA: 183] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Accepted: 03/22/2017] [Indexed: 01/10/2023] Open
Abstract
Tetraspanins are molecular scaffolds that distribute proteins into highly organized microdomains consisting of adhesion, signaling, and adaptor proteins. Many reports have identified interactions between tetraspanins and signaling molecules, finding unique downstream cellular consequences. In this review, we will explore these interactions as well as the specific cellular responses to signal activation, focusing on tetraspanin regulation of adhesion-mediated (integrins/FAK), receptor-mediated (EGFR, TNF-α, c-Met, c-Kit), and intracellular signaling (PKC, PI4K, β-catenin). Additionally, we will summarize our current understanding for how tetraspanin post-translational modifications (palmitoylation, N-linked glycosylation, and ubiquitination) can regulate signal propagation. Many of the studies outlined in this review suggest that tetraspanins offer a potential therapeutic target to modulate aberrant signal transduction pathways that directly impact a host of cellular behaviors and disease states.
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Affiliation(s)
- Christina M Termini
- Department of Pathology, University of New Mexico Health Sciences CenterAlbuquerque, NM, USA
| | - Jennifer M Gillette
- Department of Pathology, University of New Mexico Health Sciences CenterAlbuquerque, NM, USA
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Yan H, Ji X, Li J, Zhang L, Zhao P. Overexpression of KAI1 inhibits retinoblastoma metastasis in vitro. Oncol Lett 2017; 13:827-833. [PMID: 28356965 DOI: 10.3892/ol.2016.5507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 10/05/2016] [Indexed: 11/06/2022] Open
Abstract
The present study aimed to investigate the expression of cluster of differentiation 82 (KAI1), a gene involved in the suppression of tumor metastasis, in human retinoblastoma (RB) tissue and to study the effect of KAI1 expression on RB cell migration and invasion. KAI1 expression was examined in 26 patients with non-invasive and invasive retinoblastoma using reverse transcription-quantitative polymerase chain reaction and western blot analysis. A lentiviral vector containing KAI1 cDNA was used to transfect the two RB cell lines, HXO-Rb44-Gl and Y79. Following successful transfection, the migratory and invasive capacity of the two RB cell lines was evaluated using a Transwell® migration assay. KAI1 expression was observed to be downregulated in invasive RB compared to non-invasive RB. The migratory and invasive capacities of KAI1 transfected cell lines were significantly decreased compared to those of the control cells. KAI1 may be involved in retinoblastoma metastasis, and increased expression of KAI1 significantly inhibits the metastatic ability of RB cells in vitro.
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Affiliation(s)
- Hui Yan
- Department of Ophthalmology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, P.R. China
| | - Xunda Ji
- Department of Ophthalmology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, P.R. China
| | - Jing Li
- Department of Ophthalmology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, P.R. China
| | - Lei Zhang
- Department of Ophthalmology, Tongji University Affiliated Yangpu Hospital, Shanghai 200090, P.R. China
| | - Peiquan Zhao
- Department of Ophthalmology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, P.R. China
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Lu G, Zhou L, Zhang X, Zhu B, Wu S, Song W, Gong X, Wang D, Tao Y. The expression of metastasis-associated in colon cancer-1 and KAI1 in gastric adenocarcinoma and their clinical significance. World J Surg Oncol 2016; 14:276. [PMID: 27793161 PMCID: PMC5084408 DOI: 10.1186/s12957-016-1033-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 10/21/2016] [Indexed: 11/19/2022] Open
Abstract
Background The most common reason for malignant tumor treatment failure is recurrence and metastasis. Metastasis-associated in colon cancer-1 (MACC1) was originally identified as a metastatic and prognostic biomarker for colon cancer and later other solid tumors. Kangai 1 (KAI1), a marker of suppressor of metastasis, is also associated with metastasis and poor prognosis in many tumors. However, the prognostic value of either MACC1 or KAI1 in gastric adenocarcinoma (GAC) is unclear. In this study, we explored the relationship between MACC1 and KAI1 expression, as well as their respective correlation with clinicopathological features, to determine if either could be helpful for improvement of survival prognosis in GAC patients. Methods The expression levels of both MACC1 and KAI1 in 325 whole-tissue sections of GAC were examined by immunohistochemistry. Clinical data was also collected. Results MACC1 was significantly overexpressed in GAC tissues when compared to levels in normal gastric tissues; KAI1 was significantly down-expressed in GAC tissues when compared to levels in normal gastric tissues. Investigation of association between MACC1 and KAI1 protein levels with clinicopathological parameters of GAC indicated association between the expression of each with tumor grade, lymph node metastasis, invasive depth, and TNM stages. The overall survival time of patients with MACC1- or KAI1-positive GAC tumors was significantly shorter or longer than that of those who were negative. Importantly, multivariate analysis suggested that positive expression of either MACC1 or KAI1, as well as TNM stage, could be independent prognostic factors for overall survival in patients with GAC. Conclusions MACC1 and KAI1 may represent promising metastatic and prognostic biomarkers, as well as potential therapeutic targets, for GAC.
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Affiliation(s)
- Guoyu Lu
- Department of Emergence, The First Affiliated Hospital of Bengbu Medical College, No.287, Changhuai Road, Bengbu, China
| | - Lei Zhou
- Department of Pathology, the First Affiliated Hospital of Bengbu Medical College, No.287, Changhuai Road, Bengbu, China.,Department of Pathology, Bengbu Medical College, No.2600, Donghai Street, Anhui Province, China
| | - Xiaohua Zhang
- Department of Emergence, The First Affiliated Hospital of Bengbu Medical College, No.287, Changhuai Road, Bengbu, China
| | - Bo Zhu
- Department of Pathology, the First Affiliated Hospital of Bengbu Medical College, No.287, Changhuai Road, Bengbu, China.,Department of Pathology, Bengbu Medical College, No.2600, Donghai Street, Anhui Province, China
| | - Shiwu Wu
- Department of Pathology, the First Affiliated Hospital of Bengbu Medical College, No.287, Changhuai Road, Bengbu, China. .,Department of Pathology, Bengbu Medical College, No.2600, Donghai Street, Anhui Province, China.
| | - Wenqing Song
- Department of Pathology, the First Affiliated Hospital of Bengbu Medical College, No.287, Changhuai Road, Bengbu, China.,Department of Pathology, Bengbu Medical College, No.2600, Donghai Street, Anhui Province, China
| | - Xiaomeng Gong
- Department of Pathology, the First Affiliated Hospital of Bengbu Medical College, No.287, Changhuai Road, Bengbu, China.,Department of Pathology, Bengbu Medical College, No.2600, Donghai Street, Anhui Province, China
| | - Danna Wang
- Department of Pathology, the First Affiliated Hospital of Bengbu Medical College, No.287, Changhuai Road, Bengbu, China.,Department of Pathology, Bengbu Medical College, No.2600, Donghai Street, Anhui Province, China
| | - Yanyan Tao
- Department of Emergence, The First Affiliated Hospital of Bengbu Medical College, No.287, Changhuai Road, Bengbu, China
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Feng J, Huang C, Wren JD, Wang DW, Yan J, Zhang J, Sun Y, Han X, Zhang XA. Tetraspanin CD82: a suppressor of solid tumors and a modulator of membrane heterogeneity. Cancer Metastasis Rev 2016; 34:619-33. [PMID: 26335499 DOI: 10.1007/s10555-015-9585-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Tetraspanin CD82 suppresses the progression and metastasis of a wide range of solid malignant tumors. However, its roles in tumorigenesis and hematopoietic malignancy remain unclear. Ubiquitously expressed CD82 restrains cell migration and cell invasion by modulating both cell-matrix and cell-cell adhesiveness and confining outside-in pro-motility signaling. This restraint at least contributes to, if not determines, the metastasis-suppressive activity and, also likely, the physiological functions of CD82. As a modulator of cell membrane heterogeneity, CD82 alters microdomains, trafficking, and topography of the membrane by changing the membrane molecular landscape. The functional activities of membrane molecules and the cytoskeletal interaction of the cell membrane are subsequently altered, followed by changes in cellular functions. Given its pathological and physiological importance, CD82 is a promising candidate for clinically predicting and blocking tumor progression and metastasis and also an emerging model protein for mechanistically understanding cell membrane organization and heterogeneity.
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Affiliation(s)
- Jin Feng
- Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Chao Huang
- Stephenson Cancer Center and Department of Physiology, University of Oklahoma Health Sciences Center, BRC 1474, 975 NE 10th Street, Oklahoma City, OK, 73104, USA
| | - Jonathan D Wren
- Arthritis and Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Dao-Wen Wang
- Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Jizhou Yan
- Institute for Marine Biosystem and Neurosciences, Shanghai Ocean University, Shanghai, China
| | - Jiexin Zhang
- Department of Biochemistry, Nanjing Medical University, Nanjing, China
| | - Yujie Sun
- Department of Biochemistry, Nanjing Medical University, Nanjing, China
| | - Xiao Han
- Department of Biochemistry, Nanjing Medical University, Nanjing, China
| | - Xin A Zhang
- Stephenson Cancer Center and Department of Physiology, University of Oklahoma Health Sciences Center, BRC 1474, 975 NE 10th Street, Oklahoma City, OK, 73104, USA.
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Chai J, Ju J, Zhang SW, Shen ZY, Liang L, Yang XM, Ma C, Ni QW, Sun MY. p12CDK2-AP1 interacts with CD82 to regulate the proliferation and survival of human oral squamous cell carcinoma cells. Oncol Rep 2016; 36:737-44. [PMID: 27349208 DOI: 10.3892/or.2016.4893] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 02/20/2016] [Indexed: 11/05/2022] Open
Abstract
p12 cyclin-dependent kinase 2 (CDK2)-associating protein 1 (p12CDK2-AP1) has been demonstrated to negatively regulate the activity of CDK2. However, the underlying molecular mechanism remains largely unknown. We aimed to determine the potential binding proteins of p12CDK2-AP1 and to elucidate the role of p12CDK2-AP1 in the regulation of the proliferation, invasion, apoptosis, and in vivo growth of human oral squamous cell carcinoma cells. The protein-protein interaction was predicted using computational decision templates. The predicted p12CDK2‑AP1 interacting proteins were overexpressed in human oral squamous cell carcinoma OSCC-15 cells, and the protein binding was examined using co-precipitation (Co-IP). Cell proliferation and invasion were determined via MTT assay and Transwell system, respectively. Cell apoptosis was evaluated using Annexin V-FITC/PI double staining followed by flow cytometric analysis. The in vivo growth of OSCC-15 cells was examined in nude mouse tumor xenografts. We found that overexpression of either p12CDK2-AP1 or CD82 significantly suppressed the proliferation and invasion but promoted the apoptosis of OSCC-15 cells (P<0.05). Importantly, combined overexpression of p12CDK2-AP1 and CD82 showed synergistic antitumor activity compared with the overexpression of a single protein alone (P<0.05). Additionally, the simultaneous overexpression of p12CDK2-AP1 and CD82 significantly suppressed the in vivo tumor growth of OSCC-15 cells in nude mice compared with the negative control (P<0.05). Our findings indicate that p12CDK2-AP1 interacts with CD82 to play a functional role in suppressing the in vitro and in vivo growth of OSCC-15 cells.
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Affiliation(s)
- Juan Chai
- State Key Laboratory of Military Stomatology, Department of Oral and Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Jun Ju
- State Key Laboratory of Military Stomatology, Department of Oral and Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Shao-Wu Zhang
- College of Automation, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, P.R. China
| | - Zhi-Yuan Shen
- State Key Laboratory of Military Stomatology, Department of Oral and Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Liang Liang
- State Key Laboratory of Military Stomatology, Department of Oral and Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Xiang-Ming Yang
- State Key Laboratory of Military Stomatology, Department of Oral and Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Chao Ma
- State Key Laboratory of Military Stomatology, Department of Oral and Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Qian-Wei Ni
- State Key Laboratory of Military Stomatology, Department of Oral and Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Mo-Yi Sun
- State Key Laboratory of Military Stomatology, Department of Oral and Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
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Zhou L, Yu L, Wu S, Feng Z, Song W, Gong X. Clinicopathological significance of KAI1 expression and epithelial-mesenchymal transition in non-small cell lung cancer. World J Surg Oncol 2015; 13:234. [PMID: 26231404 PMCID: PMC4522085 DOI: 10.1186/s12957-015-0657-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 07/20/2015] [Indexed: 01/31/2023] Open
Abstract
Background KAI1 and epithelial-mesenchymal transition (EMT) is related to both angiogenesis and lymphangiogenesis and is an important target in new cancer treatment strategies. We aimed to investigate the KAI1 and marker of EMT expression and correlation with lymph node metastasis (LNM) and explore their prognostic impact in non-small cell lung cancer (NSCLC). Methods Tumor tissue specimens from 312 resected patients with stage I–IIIA NSCLC were obtained. Immunohistochemistry was used to assess the expression of the molecular markers KAI1, E-cadherin (E-cad), vimentin, CD34, and D2-40. Results There were 153 N0 and 159 N+ patients. Tumor cell expression of KAI1and the marker of EMT, lymphatic vessel density (LVD), and microvessel density (MVD) were related to LNM. In multivariate analyses, the ages of patients, high tumor cell KAI1 expression, EMT, and the scores of MVD were independent factor of prognosis. Conclusions Tumor cell KAI1 expression, EMT, LVD, and MVD correlate with LNM. Thus, the detection of KAI1, expression of markers of EMT, and the scores of MVD may be used as a potential indicator of NSCLC prognosis.
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Affiliation(s)
- Lei Zhou
- Department of Pathology, the First Hospital Affiliated of Bengbu Medical College, Bengbu Medical College, No. 287 Changhuai Ave, Longzihu, Bengbu, Anhui Province, 233003, China.
| | - Lan Yu
- Department of Pathology, the First Hospital Affiliated of Bengbu Medical College, Bengbu Medical College, No. 287 Changhuai Ave, Longzihu, Bengbu, Anhui Province, 233003, China.
| | - Shiwu Wu
- Department of Pathology, the First Hospital Affiliated of Bengbu Medical College, Bengbu Medical College, No. 287 Changhuai Ave, Longzihu, Bengbu, Anhui Province, 233003, China.
| | - Zhenzhong Feng
- Department of Pathology, the First Hospital Affiliated of Bengbu Medical College, Bengbu Medical College, No. 287 Changhuai Ave, Longzihu, Bengbu, Anhui Province, 233003, China.
| | - Wenqing Song
- Department of Pathology, the First Hospital Affiliated of Bengbu Medical College, Bengbu Medical College, No. 287 Changhuai Ave, Longzihu, Bengbu, Anhui Province, 233003, China.
| | - Xiaomeng Gong
- Department of Pathology, the First Hospital Affiliated of Bengbu Medical College, Bengbu Medical College, No. 287 Changhuai Ave, Longzihu, Bengbu, Anhui Province, 233003, China.
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Detchokul S, Williams ED, Parker MW, Frauman AG. Tetraspanins as regulators of the tumour microenvironment: implications for metastasis and therapeutic strategies. Br J Pharmacol 2015; 171:5462-90. [PMID: 23731188 DOI: 10.1111/bph.12260] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 05/16/2013] [Accepted: 05/16/2013] [Indexed: 12/13/2022] Open
Abstract
UNLABELLED One of the hallmarks of cancer is the ability to activate invasion and metastasis. Cancer morbidity and mortality are largely related to the spread of the primary, localized tumour to adjacent and distant sites. Appropriate management and treatment decisions based on predicting metastatic disease at the time of diagnosis is thus crucial, which supports better understanding of the metastatic process. There are components of metastasis that are common to all primary tumours: dissociation from the primary tumour mass, reorganization/remodelling of extracellular matrix, cell migration, recognition and movement through endothelial cells and the vascular circulation and lodgement and proliferation within ectopic stroma. One of the key and initial events is the increased ability of cancer cells to move, escaping the regulation of normal physiological control. The cellular cytoskeleton plays an important role in cancer cell motility and active cytoskeletal rearrangement can result in metastatic disease. This active change in cytoskeletal dynamics results in manipulation of plasma membrane and cellular balance between cellular adhesion and motility which in turn determines cancer cell movement. Members of the tetraspanin family of proteins play important roles in regulation of cancer cell migration and cancer-endothelial cell interactions, which are critical for cancer invasion and metastasis. Their involvements in active cytoskeletal dynamics, cancer metastasis and potential clinical application will be discussed in this review. In particular, the tetraspanin member, CD151, is highlighted for its major role in cancer invasion and metastasis. LINKED ARTICLES This article is part of a themed section on Cytoskeleton, Extracellular Matrix, Cell Migration, Wound Healing and Related Topics. To view the other articles in this section visit http://dx.doi.org/10.1111/bph.2014.171.issue-24.
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Affiliation(s)
- S Detchokul
- Clinical Pharmacology and Therapeutics Unit, Department of Medicine (Austin Health/Northern Health), The University of Melbourne, Heidelberg, Vic., Australia
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miR-203 Inhibits Frizzled-2 Expression via CD82/KAI1 Expression in Human Lung Carcinoma Cells. PLoS One 2015; 10:e0131350. [PMID: 26132195 PMCID: PMC4488846 DOI: 10.1371/journal.pone.0131350] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Accepted: 06/01/2015] [Indexed: 12/20/2022] Open
Abstract
CD82/KAI1, a member of the tetraspanin superfamily, is a suppressor of metastasis and CD82 inhibits canonical Wnt signaling via downregulation of several Frizzled (FZD) isoforms, resulting in accumulation of β-catenin at the cell membrane. In this study, we investigated the mechanism through which CD82 inhibited FZD expression by examining the effects of microRNAs (miRNAs). The miRanda algorithm predicted 11 miRNAs from FZD sequences. Among these miRNAs, CD82 caused upregulation of miR-203 (by 2.095-fold) and downregulation of miR-338-3p (by 0.354-fold) as compared with control cells. Transfection with miR-203 and miR338-3p mimics or inhibitors revealed that miR-203 downregulated FZD2 mRNA (by 0.268-fold) and protein expression (by 0.701-fold). Moreover, transfection with the miR-203 mimic also inhibited cell migration. Therefore, these findings suggested that CD82 enhanced the expression of miR-203 and directly downregulate FZD2 expression, suppressing cancer metastasis by inhibition of the Wnt signaling pathway.
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Yoshihama N, Yamaguchi K, Chigita S, Mine M, Abe M, Ishii K, Kobayashi Y, Akimoto N, Mori Y, Sugiura T. A Novel Function of CD82/KAI1 in Sialyl Lewis Antigen-Mediated Adhesion of Cancer Cells: Evidence for an Anti-Metastasis Effect by Down-Regulation of Sialyl Lewis Antigens. PLoS One 2015; 10:e0124743. [PMID: 25923697 PMCID: PMC4414583 DOI: 10.1371/journal.pone.0124743] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Accepted: 03/03/2015] [Indexed: 12/04/2022] Open
Abstract
We have recently elucidated a novel function for CD82 in E-cadherin-mediated homocellular adhesion; due to this function, it can inhibit cancer cell dissociation from the primary cancer nest and limit metastasis. However, the effect of CD82 on selectin ligand-mediated heterocellular adhesion has not yet been elucidated. In this study, we focused on the effects of the metastasis suppressor CD82/KAI1 on heterocellular adhesion of cancer cells to the endothelium of blood vessels in order to further elucidate the function of tetraspanins. The over-expression of CD82 in cancer cells led to the inhibition of experimentally induced lung metastases in mice and significantly inhibited the adhesion of these cells to human umbilical vein epithelial cells (HUVECs) in vitro. Pre-treatment of the cells with function-perturbing antibodies against sLea/x significantly inhibited the adhesion of CD82-negative cells to HUVECs. In addition, cells over-expressing CD82 exhibited reduced expression of sLea/x compared to CD82-negative wild-type cells. Significant down-regulation of ST3 β-galactoside α-2, 3-sialyltransferase 4 (ST3GAL4) was detected by cDNA microarray, real-time PCR, and western blotting analyses. Knockdown of ST3GAL4 on CD82-negative wild-type cells inhibited expression of sLex and reduced cell adhesion to HUVECs. We concluded that CD82 decreases sLea/x expression via the down-regulation of ST3GAL4 expression and thereby reduces the adhesion of cancer cells to blood vessels, which results in inhibition of metastasis.
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Affiliation(s)
- Naoya Yoshihama
- Section of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812–8582, Japan
| | - Koujiro Yamaguchi
- Department of Maxillofacial Diagnostic and Surgical Science, Field of Oral and Maxillofacial Rehabilitation, Graduate School of Medical and Dental Science, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima, 890–8544, Japan
| | - Satomi Chigita
- Section of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812–8582, Japan
| | - Mariko Mine
- Section of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812–8582, Japan
| | - Masakazu Abe
- Section of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812–8582, Japan
| | - Kotaro Ishii
- Section of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812–8582, Japan
| | - Yosuke Kobayashi
- Section of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812–8582, Japan
| | - Naonari Akimoto
- Section of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812–8582, Japan
| | - Yoshihide Mori
- Section of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812–8582, Japan
| | - Tsuyoshi Sugiura
- Department of Maxillofacial Diagnostic and Surgical Science, Field of Oral and Maxillofacial Rehabilitation, Graduate School of Medical and Dental Science, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima, 890–8544, Japan
- * E-mail:
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Roles of Tsp66E and Tsp74F in border cell migration and the maintenance of border cell adhesion in Drosophila. Genes Genomics 2015. [DOI: 10.1007/s13258-015-0285-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Han Z, Chen Z, Zheng R, Cheng Z, Gong X, Wang D. Clinicopathological significance of CD133 and CD44 expression in infiltrating ductal carcinoma and their relationship to angiogenesis. World J Surg Oncol 2015; 13:56. [PMID: 25889325 PMCID: PMC4344776 DOI: 10.1186/s12957-015-0486-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2014] [Accepted: 01/26/2015] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND Breast cancer is the leading cause of cancer death in females worldwide, and the majority type is infiltrating ductal carcinoma (IDC). Most of IDC patients died of metastasis and recurrence. Cancer stem cells (CSCs) are defined with the ability to be self-renewal and potentially promote proliferation and formation of tumors. CSCs are related to angiogenesis and are important targets in new cancer treatment strategies. In this study, we purposed to investigate on expression and clinical significances of CSCs marked by CD133 and CD44 in IDC and their relationship to angiogenesis. METHODS The specimens of IDC from 325 Chinese patients with follow-up were analyzed for CD133, CD44, CD82, and CD34 protein expression by immunohistochemical staining. The Pearson chi-square test and t test were used to assess the associations among the positive staining of these markers and clinicopathological characteristics. Postoperative overall survival time in these patients with IDC was analyzed by univariate and multivariate analyses. RESULTS In IDC tissues, positive rates of 48.6%, 53.8%, and 42.2% were obtained for CD133, CD44, and CD82 protein, respectively; the mean score of microvessel density (MVD) was 20.5 ± 7.0 in IDC group. And there was a significant difference between the two groups. There was a positive relationship between the expression of CD133, CD44, and the score of MVD and the grades of tumor, lymph node metastasis, tumor-node-metastasis (TNM) stages (all P < 0.05); and the expression of CD82 was negatively related to grades of tumor, lymph node metastasis, and TNM stages (all P < 0.05). The overall mean survival time of the patients with CD133, CD44, and the score of MVD (≥21) positive expression was lower than that of patients with negative expression. The overall mean survival time of patients of CD82-positive expression was longer than that of patients of the negative expression group. The positive expression of CD133 and CD82, and TNM stages were independent prognostic factors of IDC (P < 0.05). CONCLUSIONS CSCs, angiogenesis, and aberrant expression of CD82 may be involved in the initiation, development, metastasis, and recurrence. It is suggested that CSCs, angiogenesis, and CD82 be possible as a therapeutic marker for anti-tumor therapy.
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Affiliation(s)
- Zhengquan Han
- Department of Medical Oncology, The Second Affiliated Hospital of Anhui Medical University, No. 687, Furong Road, Hefei, 230000, Anhui Province, China. .,Department of Medical Oncology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, 233000, Anhui Province, China.
| | - Zhendong Chen
- Department of Medical Oncology, The Second Affiliated Hospital of Anhui Medical University, No. 687, Furong Road, Hefei, 230000, Anhui Province, China.
| | - Rongsheng Zheng
- Department of Medical Oncology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, 233000, Anhui Province, China.
| | - Zenong Cheng
- Department of Pathology, The First Affiliated Hospital of Bengbu Medical College of Bengbu Medical College, No. 287 Changhuai Road, Bengbu, 233000, Anhui Province, China.
| | - Xiaomeng Gong
- Department of Pathology, The First Affiliated Hospital of Bengbu Medical College of Bengbu Medical College, No. 287 Changhuai Road, Bengbu, 233000, Anhui Province, China.
| | - Danna Wang
- Department of Pathology, The First Affiliated Hospital of Bengbu Medical College of Bengbu Medical College, No. 287 Changhuai Road, Bengbu, 233000, Anhui Province, China.
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Ganguly SS, Li X, Miranti CK. The host microenvironment influences prostate cancer invasion, systemic spread, bone colonization, and osteoblastic metastasis. Front Oncol 2014; 4:364. [PMID: 25566502 PMCID: PMC4266028 DOI: 10.3389/fonc.2014.00364] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Accepted: 11/29/2014] [Indexed: 12/28/2022] Open
Abstract
Prostate cancer (PCa) is the second leading cause of cancer death in men worldwide. Most PCa deaths are due to osteoblastic bone metastases. What triggers PCa metastasis to the bone and what causes osteoblastic lesions remain unanswered. A major contributor to PCa metastasis is the host microenvironment. Here, we address how the primary tumor microenvironment influences PCa metastasis via integrins, extracellular proteases, and transient epithelia-mesenchymal transition (EMT) to promote PCa progression, invasion, and metastasis. We discuss how the bone-microenvironment influences metastasis; where chemotactic cytokines favor bone homing, adhesion molecules promote colonization, and bone-derived signals induce osteoblastic lesions. Animal models that fully recapitulate human PCa progression from primary tumor to bone metastasis are needed to understand the PCa pathophysiology that leads to bone metastasis. Better delineation of the specific processes involved in PCa bone metastasize is needed to prevent or treat metastatic PCa. Therapeutic regimens that focus on the tumor microenvironment could add to the PCa pharmacopeia.
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Affiliation(s)
- Sourik S Ganguly
- Program for Skeletal Disease and Tumor Metastasis, Laboratory of Tumor Microenvironment and Metastasis, Center for Cancer and Cell Biology, Van Andel Research Institute , Grand Rapids, MI , USA ; Program for Skeletal Disease and Tumor Metastasis, Laboratory of Integrin Signaling and Tumorigenesis, Center for Cancer and Cell Biology, Van Andel Research Institute , Grand Rapids, MI , USA
| | - Xiaohong Li
- Program for Skeletal Disease and Tumor Metastasis, Laboratory of Tumor Microenvironment and Metastasis, Center for Cancer and Cell Biology, Van Andel Research Institute , Grand Rapids, MI , USA
| | - Cindy K Miranti
- Program for Skeletal Disease and Tumor Metastasis, Laboratory of Integrin Signaling and Tumorigenesis, Center for Cancer and Cell Biology, Van Andel Research Institute , Grand Rapids, MI , USA
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Upheber S, Karle A, Miller J, Schlaugk S, Gross E, Reuning U. Alternative splicing of KAI1 abrogates its tumor-suppressive effects on integrin αvβ3-mediated ovarian cancer biology. Cell Signal 2014; 27:652-62. [PMID: 25435431 DOI: 10.1016/j.cellsig.2014.11.028] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 11/21/2014] [Indexed: 01/31/2023]
Abstract
Loss or downregulation of the tumor-suppressor KAI1 correlates with poor cancer patient prognosis. KAI1 functions by interacting with other proteins, including integrin cell adhesion and signaling receptors. We previously showed that KAI1 physically and functionally crosstalks with the tumor-biologically relevant integrin αvβ3, thereby suppressing ovarian cancer cell migration and proliferation. Interestingly, in metastases, a KAI1 splice variant had been identified, indicating poor patient prognosis. Thus, we here characterized differential effects of the two KAI1 proteins upon their cellular restoration. Opposite to KAI1, KAI1-splice reduced αvβ3-mediated cell adhesion, thereby inducing cell migration. This was accompanied by elevated αvβ3 levels and drastically elevated focal adhesion kinase activation, however, without any obvious colocalization with αvβ3, as observed for KAI1. Moreover, codistribution of KAI1 with the cell/cell-adhesion molecule E-cadherin was abrogated in KAI1-splice. Whereas KAI1 diminished cell proliferative activity, KAI1-splice prominently enhanced cell proliferation concomitant with elevated transcription and cell-surface expression of the epidermal growth factor receptor. Thus KAI1-splice does not only counteract the tumor-suppressive actions of KAI1, but - beyond that - promotes αvβ3-mediated biological functions in favor of tumor progression and metastasis.
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Affiliation(s)
- Sina Upheber
- Clinical Research Unit, Department for Gynecology & Obstetrics, Technische Universitaet München, Germany
| | - Alexandra Karle
- Clinical Research Unit, Department for Gynecology & Obstetrics, Technische Universitaet München, Germany
| | - Julia Miller
- Clinical Research Unit, Department for Gynecology & Obstetrics, Technische Universitaet München, Germany
| | - Stephanie Schlaugk
- Division of Tumor Genetics, Department for Obstetrics & Gynecology, Technische Universitaet Muenchen, Germany
| | - Eva Gross
- Division of Tumor Genetics, Department for Obstetrics & Gynecology, Technische Universitaet Muenchen, Germany
| | - Ute Reuning
- Clinical Research Unit, Department for Gynecology & Obstetrics, Technische Universitaet München, Germany.
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Tetraspanin-enriched microdomains and hepatocellular carcinoma progression. Cancer Lett 2014; 351:23-9. [PMID: 24858024 DOI: 10.1016/j.canlet.2014.05.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 05/05/2014] [Accepted: 05/06/2014] [Indexed: 02/06/2023]
Abstract
As in many tumors, heterogeneity within the cell population is one of the main features of hepatocellular carcinoma (HCC). Heterogeneity results from the ability of tumor to produce multiple subpopulations of cells with diverse genetic, biochemical and immunological characteristics. Little is known about how heterogeneity emerges and how it is maintained. Fluctuations in single cells can be masked or completely misrepresented when cell populations are analyzed. It has become exceedingly apparent that the utility of measurement based on the analysis of bulk specimens is limited by intra-tumor genetic and epigenetic heterogeneity, as characteristics of the most abundant cell type might not necessarily predict the properties of cell populations. Yet, such non-uniformities often unveil molecular patterns that can represent mechanisms of tumor progression. Interestingly, variability among single cells in a population may arise from different responses to intrinsic and extrinsic perturbations mainly mediated by the plasma membrane. The association of certain proteins, including tetraspanins, and lipids in specific location on the plasma membrane constitutes specialized structure called tetraspanin-enriched microdomains (TEMs). TEMs organization in cancer may reveal essential clues for understanding pathogenic mechanisms underlying cancer progression. Along these lines, TEMs and HCC progression represent a valuable paradigm for gaining a deeper understanding of such mechanisms.
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FUJINAGA TAKAHIRO, KUMAMARU WATARU, SUGIURA TSUYOSHI, KOBAYASHI YOSUKE, OHYAMA YUKIKO, IKARI TATSUYA, ONIMARU MITSUHO, AKIMOTO NAONARI, JOGO RUMI, MORI YOSHIHIDE. Biological characterization and analysis of metastasis-related genes in cell lines derived from the primary lesion and lymph node metastasis of a squamous cell carcinoma arising in the mandibular gingiva. Int J Oncol 2014; 44:1614-24. [DOI: 10.3892/ijo.2014.2332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Accepted: 01/28/2014] [Indexed: 11/05/2022] Open
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Kobayashi Y, Sugiura T, Imajyo I, Shimoda M, Ishii K, Akimoto N, Yoshihama N, Mori Y. Knockdown of the T-box transcription factor Brachyury increases sensitivity of adenoid cystic carcinoma cells to chemotherapy and radiation in vitro: implications for a new therapeutic principle. Int J Oncol 2014; 44:1107-17. [PMID: 24504414 PMCID: PMC3977806 DOI: 10.3892/ijo.2014.2292] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 01/24/2014] [Indexed: 01/01/2023] Open
Abstract
Adenoid cystic carcinoma (AdCC) is highly metastatic and resistant to chemotherapy and radiotherapy. Recently, we reported that the T-box transcription factor Brachyury is a potential regulator of cancer stem cells (CSCs). Specifically, growth of CSCs was found to be controlled by Brachyury knockdown in AdCC. Since CSCs are resistant to chemotherapy and radiotherapy, this finding provides a new principle for therapies targeting CSCs. In the present study, we established that Brachyury knockdown suppresses chemoresistance and radioresistance in vitro. Brachyury was knocked down by transfecting Brachyury short hairpin RNA (shRNA) into the AdCC CSC cell line ACCS-M GFP. Brachyury knockdown significantly inhibited cell migration and invasion and suppressed chemoresistance. A quantitative PCR array of drug transporter genes revealed that knockdown of Brachyury caused downregulation of ATP-binding cassette transporter genes. Furthermore, ACCS-M GFP radioresistance was significantly suppressed by Brachyury knockdown. Knockdown of Brachyury significantly sensitized ACCS-M GFP cells to chemoradiotherapy. This study demonstrates that Brachyury knockdown reduces invasiveness and chemoresistance and radioresistance of CSCs in vivo. Therefore, Brachyury knockdown may be a useful therapeutic tool for sensitizing CSCs to conventional chemoradiotherapy.
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Affiliation(s)
- Yosuke Kobayashi
- Section of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Higashi-ku, Fukuoka 812-8582, Japan
| | - Tsuyoshi Sugiura
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Higashi-ku, Fukuoka 812-8582, Japan
| | - Ikumi Imajyo
- Section of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Higashi-ku, Fukuoka 812-8582, Japan
| | - Miyuki Shimoda
- Section of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Higashi-ku, Fukuoka 812-8582, Japan
| | - Kotaro Ishii
- Section of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Higashi-ku, Fukuoka 812-8582, Japan
| | - Naonari Akimoto
- Section of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Higashi-ku, Fukuoka 812-8582, Japan
| | - Naoya Yoshihama
- Section of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Higashi-ku, Fukuoka 812-8582, Japan
| | - Yoshihide Mori
- Section of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Higashi-ku, Fukuoka 812-8582, Japan
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Kwon HJ, Min SY, Park MJ, Lee C, Park JH, Chae JY, Moon KC. Expression of CD9 and CD82 in clear cell renal cell carcinoma and its clinical significance. Pathol Res Pract 2014; 210:285-90. [PMID: 24553302 DOI: 10.1016/j.prp.2014.01.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 01/07/2014] [Accepted: 01/14/2014] [Indexed: 12/22/2022]
Abstract
CD9 and CD82, members of the tetraspanin family, act as metastasis suppressors in many human malignant tumors, but the role of these molecules is not well known in clear cell renal cell carcinoma (CCRCC). This study was designed to evaluate the immunohistochemical expression of CD9 and CD82 in 644 cases of CCRCC and to determine the clinicopathologic and prognostic significance of their expression. The percentage of positive tumor cells was evaluated, and the expression was classified into 2 categories: low expression (less than 10% positive cells) or high expression (more than 10% positive cells) for CD9 expression and negative (no positive cells) or positive for CD82 expression. CD9 high expression was found in 303 (47.0%) patients, and CD82 positivity was found in 98 (15.2%) patients. High expression of CD9 was statistically associated with older patients (p=0.003). The cases showing positive immunoreactivity for CD82 exhibited a high stage (p<0.001) and high nuclear grade (p<0.001). The overall, cancer-specific and progression-free survival rates were significantly higher in patients with a CD82-negative profile compared to patients with a CD82-positive profile (p<0.001). Although the biological function of CD82 in CCRCC remains unclear, the CCRCC patients with CD82 positive expression show poor prognosis.
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Affiliation(s)
- Hyeong Ju Kwon
- Department of Pathology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Sun Young Min
- Department of Pathology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Min Jee Park
- Department of Pathology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Cheol Lee
- Department of Pathology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jeong Hwan Park
- Department of Pathology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Ji Youn Chae
- Department of Pathology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Kyung Chul Moon
- Department of Pathology, Seoul National University College of Medicine, Seoul, Republic of Korea; Kidney Research Institute, Medical Research Center, Seoul National University College of Medicine, Seoul, Republic of Korea.
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Abstract
An abundance of evidence shows supporting roles for tetraspanin proteins in human cancer. Many studies show that the expression of tetraspanins correlates with tumour stage, tumour type and patient outcome. In addition, perturbations of tetraspanins in tumour cell lines can considerably affect cell growth, morphology, invasion, tumour engraftment and metastasis. This Review emphasizes new studies that have used de novo mouse cancer models to show that select tetraspanin proteins have key roles in tumour initiation, promotion and metastasis. This Review also emphasizes how tetraspanin proteins can sometimes participate in tumour angiogenesis. These recent data build an increasingly strong case for tetraspanins as therapeutic targets.
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Saleh SM, Parhar RS, Al-Hejailan RS, Bakheet RH, Khaleel HS, Khalak HG, Halees AS, Zaidi MZ, Meyer BF, Yung GP, Seebach JD, Conca W, Khabar KS, Collison KS, Al-Mohanna FA. Identification of the tetraspanin CD82 as a new barrier to xenotransplantation. THE JOURNAL OF IMMUNOLOGY 2013; 191:2796-805. [PMID: 23872050 DOI: 10.4049/jimmunol.1300601] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Significant immunological obstacles are to be negotiated before xenotransplantation becomes a clinical reality. An initial rejection of transplanted vascularized xenograft is attributed to Galα1,3Galβ1,4GlcNAc-R (Galα1,3-Gal)-dependent and -independent mechanisms. Hitherto, no receptor molecule has been identified that could account for Galα1,3-Gal-independent rejection. In this study, we identify the tetraspanin CD82 as a receptor molecule for the Galα1,3-Gal-independent mechanism. We demonstrate that, in contrast to human undifferentiated myeloid cell lines, differentiated cell lines are capable of recognizing xenogeneic porcine aortic endothelial cells in a calcium-dependent manner. Transcriptome-wide analysis to identify the differentially expressed transcripts in these cells revealed that the most likely candidate of the Galα1,3-Gal-independent recognition moiety is the tetraspanin CD82. Abs to CD82 inhibited the calcium response and the subsequent activation invoked by xenogeneic encounter. Our data identify CD82 on innate immune cells as a major "xenogenicity sensor" and open new avenues of intervention to making xenotransplantation a clinical reality.
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Affiliation(s)
- Soad M Saleh
- Department of Cell Biology, King Faisal Specialist Hospital and Research Center, Riyadh 11211, Saudi Arabia
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Fairchild CL, Gammill LS. Tetraspanin18 is a FoxD3-responsive antagonist of cranial neural crest epithelial-to-mesenchymal transition that maintains cadherin-6B protein. J Cell Sci 2013; 126:1464-76. [PMID: 23418345 PMCID: PMC3644144 DOI: 10.1242/jcs.120915] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/14/2013] [Indexed: 01/06/2023] Open
Abstract
During epithelial-to-mesenchymal transition (EMT), tightly associated, polarized epithelial cells become individual mesenchymal cells capable of migrating. Here, we investigate the role of the transmembrane protein tetraspanin18 (Tspan18) in chick cranial neural crest EMT. Tspan18 mRNA is expressed in premigratory cranial neural crest cells, but is absent from actively migrating neural crest cells. Tspan18 knockdown leads to a concomitant loss of cadherin-6B (Cad6B) protein, whereas Cad6B protein persists when Tspan18 expression is extended. The temporal profile of Cad6B mRNA downregulation is unaffected in these embryos, which indicates that Tspan18 maintains Cad6B protein levels and reveals that Cad6B is regulated by post-translational mechanisms. Although downregulation of Tspan18 is necessary, it is not sufficient for neural crest migration: the timing of neural crest emigration, basal lamina breakdown and Cad7 upregulation proceed normally in Tspan18-deficient cells. This emphasizes the need for coordinated transcriptional and post-translational regulation of Cad6B during EMT and illustrates that Tspan18-antagonized remodeling of cell-cell adhesions is only one step in preparation for cranial neural crest migration. Unlike Cad6B, which is transcriptionally repressed by Snail2, Tspan18 expression is downstream of the winged-helix transcription factor FoxD3, providing a new transcriptional input into cranial neural crest EMT. Together, our data reveal post-translational regulation of Cad6B protein levels by Tspan18 that must be relieved by a FoxD3-dependent mechanism in order for cranial neural crest cells to migrate. These results offer new insight into the molecular mechanisms of cranial neural crest EMT and expand our understanding of tetraspanin function relevant to metastasis.
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Affiliation(s)
| | - Laura S. Gammill
- Department of Genetics, Cell Biology, and Development, 6-160 Jackson Hall, 321 Church Street SE, University of Minnesota, Minneapolis, MN 55455, USA
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Saito Y, Kasamatsu A, Yamamoto A, Shimizu T, Yokoe H, Sakamoto Y, Ogawara K, Shiiba M, Tanzawa H, Uzawa K. ALY as a potential contributor to metastasis in human oral squamous cell carcinoma. J Cancer Res Clin Oncol 2012; 139:585-94. [PMID: 23242234 DOI: 10.1007/s00432-012-1361-5] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Accepted: 12/04/2012] [Indexed: 12/01/2022]
Abstract
PURPOSE ALY, an essential mRNA export factor, is dysregulated in a wide variety of human malignancies. However, little is known about the relevance of ALY to oral squamous cell carcinoma (OSCC). The purpose of this study was to investigate ALY expression and its functional mechanisms in OSCCs. METHODS ALY mRNA and protein expression in seven OSCC-derived cell lines (Sa3, HO-1-u-1, KON, Ca9-22, HSC-2, HSC-3, and HSC-4) and primary OSCCs were analyzed by quantitative reverse transcriptase-polymerase chain reaction, immunoblotting, and immunohistochemistry. We evaluated cellular invasiveness, migration, and the expression levels of metastasis modulators, ribosomal RNA processing 1 homolog B (RRP1B) and CD82, in ALY knockdown cells. RESULTS ALY was frequently up-regulated in OSCC-derived cell lines and primary OSCCs compared with normal counterparts at both the mRNA and protein expression levels. ALY-positive expression was correlated significantly (P < 0.05) with a higher risk of regional lymph node metastasis. Furthermore, ALY knockdown cells caused a significant (P < 0.05) decrease in cellular invasiveness and migration with up-regulation of RRP1B and CD82 compared with the control cells. CONCLUSION Our results showed that ALY is linked to regional lymph node metastasis by regulating cellular invasiveness and migration. Therefore, ALY might be a potential biomarker for early detection of lymph node metastasis in OSCCs.
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Affiliation(s)
- Yasuhiro Saito
- Department of Clinical Molecular Biology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
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Liu WM, Zhang F, Moshiach S, Zhou B, Huang C, Srinivasan K, Khurana S, Zheng Y, Lahti JM, Zhang XA. Tetraspanin CD82 inhibits protrusion and retraction in cell movement by attenuating the plasma membrane-dependent actin organization. PLoS One 2012; 7:e51797. [PMID: 23251627 PMCID: PMC3522597 DOI: 10.1371/journal.pone.0051797] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Accepted: 11/12/2012] [Indexed: 11/18/2022] Open
Abstract
To determine how tetraspanin KAI1/CD82, a tumor metastasis suppressor, inhibits cell migration, we assessed which cellular events critical for motility are altered by KAI1/CD82 and how KAI1/CD82 regulates these events. We found that KAI1/CD82-expressing cells typically exhibited elongated cellular tails and diminished lamellipodia. Live imaging demonstrated that the polarized protrusion and retraction of the plasma membrane became deficient upon KAI1/CD82 expression. The deficiency in developing these motility-related cellular events was caused by poor formations of actin cortical network and stress fiber and by aberrant dynamics in actin organization. Rac1 activity was reduced by KAI1/CD82, consistent with the diminution of lamellipodia and actin cortical network; while the growth factor-stimulated RhoA activity was blocked by KAI1/CD82, consistent with the loss of stress fiber and attenuation in cellular retraction. Upon KAI1/CD82 expression, Rac effector cofilin was not enriched at the cell periphery to facilitate lamellipodia formation while Rho kinase exhibited a significantly lower activity leading to less retraction. Phosphatidylinositol 4, 5-biphosphate, which initiates actin polymerization from the plasma membrane, became less detectable at the cell periphery in KAI1/CD82-expressing cells. Moreover, KAI1/CD82-induced phenotypes likely resulted from the suppression of multiple signaling pathways such as integrin and growth factor signaling. In summary, at the cellular level KAI1/CD82 inhibited polarized protrusion and retraction events by disrupting actin reorganization; at the molecular level, KAI1/CD82 deregulated Rac1, RhoA, and their effectors cofilin and Rho kinase by perturbing the plasma membrane lipids.
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Affiliation(s)
- Wei M. Liu
- Vascular Biology and Cancer Centers and Departments of Medicine and Molecular Science, University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
| | - Feng Zhang
- Vascular Biology and Cancer Centers and Departments of Medicine and Molecular Science, University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
| | - Simon Moshiach
- Department of Genetics and Tumor Cell Biology, St. Jude Children’s Research Hospital, Memphis, Tennessee, United States of America
| | - Bin Zhou
- Vascular Biology and Cancer Centers and Departments of Medicine and Molecular Science, University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
| | - Chao Huang
- Vascular Biology and Cancer Centers and Departments of Medicine and Molecular Science, University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
| | - Kamalakkannan Srinivasan
- Department of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
| | - Seema Khurana
- Department of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
| | - Yi Zheng
- Division of Experimental Hematology, Cincinnati Children's Hospital, Cincinnati, Ohio, United States of America
| | - Jill M. Lahti
- Department of Genetics and Tumor Cell Biology, St. Jude Children’s Research Hospital, Memphis, Tennessee, United States of America
| | - Xin A. Zhang
- Vascular Biology and Cancer Centers and Departments of Medicine and Molecular Science, University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
- * E-mail:
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Chigita S, Sugiura T, Abe M, Kobayashi Y, Shimoda M, Onoda M, Shirasuna K. CD82 inhibits canonical Wnt signalling by controlling the cellular distribution of β-catenin in carcinoma cells. Int J Oncol 2012; 41:2021-8. [PMID: 23076981 PMCID: PMC3583648 DOI: 10.3892/ijo.2012.1671] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Accepted: 09/17/2012] [Indexed: 01/07/2023] Open
Abstract
We have recently unravelled a novel function for CD82 in E-cadherin-mediated cellular adhesion. CD82 inhibits β-catenin tyrosine phosphorylation and stabilizes E-cadherin-β-catenin complexes at the cell membrane. This function inhibits cancer cell dissociation from the primary cancer nest and limits metastasis. In this study, we focused on the effect of CD82 on the Wnt/β-catenin (canonical) pathway, which controls the cellular distribution of β-catenin. CD82 had no effect on the expression of Wnt proteins but led to significant downregulation of Frizzled (Fzd) 2, 3, 5, 7 and 9, suggesting downregulation of the Wnt/β-catenin pathway. CD82 also inhibited phosphorylation of β-catenin at Ser45, Ser33, Ser37 and Thr41 by downregulation of glycogen synthase kinase-3β (GSK-3β) and kinase casein kinase 1α (CK1α). Downregulation of GSK-3β and CK1α also led to accumulation of β-catenin in the cytoplasm or at the cell membrane. CD82 translocated β-catenin to the cell membrane, suggesting that CD82 strengthens the interaction between E-cadherin and β-catenin. We concluded that CD82 attenuates Wnt signalling by controlling β-catenin cellular distribution at multiple levels: i) inhibition of β-catenin nuclear translocation by downregulation of Fzd receptor proteins; ii) accumulation of β-catenin at the cell membrane by downregulation of GSK-3β and CK1α; and iii) stabilization of the E-cadherin-β-catenin complex.
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Affiliation(s)
- Satomi Chigita
- Division of Maxillofacial Diagnostic and Surgical Sciences, Department of Oral and Maxillofacial Surgery, Graduate School of Dental Science, Kyushu University, Higashi-ku, Fukuoka 812-8582, Japan
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Tsai YC, Weissman AM. Dissecting the diverse functions of the metastasis suppressor CD82/KAI1. FEBS Lett 2011; 585:3166-73. [PMID: 21875585 PMCID: PMC3409691 DOI: 10.1016/j.febslet.2011.08.031] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Revised: 08/19/2011] [Accepted: 08/19/2011] [Indexed: 01/22/2023]
Abstract
The recent identification of metastasis suppressor genes, the products of which inhibit metastasis but not primary tumor growth, distinguishes oncogenic transformation and tumor suppression from a hallmark of malignancy, the ability of cancer cells to invade sites distant from the primary tumor. The metastasis suppressor CD82/KAI1 is a member of the tetraspanin superfamily of glycoproteins. CD82 suppresses metastasis by multiple mechanisms including inhibition of cell motility and invasion, promotion of cell polarity as well as induction of senescence and apoptosis in response to extracellular stimuli. A common feature of these diverse effects is CD82 regulation of membrane organization as well as protein trafficking and interactions, which affects cellular signaling and intercellular communication.
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Affiliation(s)
- Yien Che Tsai
- Laboratory of Protein Dynamics and Signaling, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, United States.
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Nagao K, Oka K. HIF-2 directly activates CD82 gene expression in endothelial cells. Biochem Biophys Res Commun 2011; 407:260-5. [PMID: 21382346 DOI: 10.1016/j.bbrc.2011.03.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Accepted: 03/03/2011] [Indexed: 10/18/2022]
Abstract
Hypoxia inducible factor (HIF)-1 and HIF-2 are transcription factors that mediate the cellular response to hypoxia. Although HIF-1 and HIF-2 share the same target genes, both proteins activate a distinct subset of genes. To identify the target genes preferentially activated by HIF-2 in endothelial cells, DNA microarray analysis was performed to human umbilical vein endothelial cells (HUVECs) with forced expression of either HIF-1α or HIF-2α. In the present study, which is the first comparative study of target genes induced by either HIF-1 or HIF-2 in HUVECs, HIF-1 (and not HIF-2) stimulated mainly glycolytic, hexose metabolic and alcohol metabolic gene expression. However, HIF-2 (but not HIF-1) induced developmental gene expressions such as Fms-like tyrosine kinase 1 (Flt-1) and angiopoietin 2 (Angpt2). Furthermore, CD82 was up-regulated by HIF-2, but not by HIF-1, in response to hypoxia. HIF-2 regulated CD82 gene expression by binding to its HRE consensus sequence located within its first intron. Assessing the function of CD82 in HUVECs forced its expression. This result revealed that CD82 negatively regulates the HUVECs cell migration. The induction of CD82 gene expression in endothelial cells provided new insights into a specific function of HIF-2.
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Affiliation(s)
- Kaori Nagao
- Department of Cell Biology, National Cerebral and Cardiovascular Center Research Institute, 5-7-1 Fujishirodai, Suita, Osaka 565-8565, Japan.
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Tetraspanins and tumor progression. Clin Exp Metastasis 2010; 28:261-70. [DOI: 10.1007/s10585-010-9365-5] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2010] [Accepted: 11/30/2010] [Indexed: 02/07/2023]
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Lefèvre B, Wolf JP, Ziyyat A. Sperm-egg interaction: is there a link between tetraspanin(s) and GPI-anchored protein(s)? Bioessays 2010; 32:143-52. [DOI: 10.1002/bies.200900159] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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