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Omeljaniuk WJ, Charkiewicz AE, Garley M, Ratajczak-Wrona W, Czerniecki J, Jabłońska E, Cechowska-Pasko M, Miltyk W. Bisphenol A: Potential Factor of Miscarriage in Women in the Context of the Phenomenon of Neutrophil Extracellular Traps. Arch Immunol Ther Exp (Warsz) 2022; 70:24. [PMID: 36181646 PMCID: PMC9526682 DOI: 10.1007/s00005-022-00661-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 09/08/2022] [Indexed: 11/05/2022]
Abstract
Humans are exposed to a number of environmental pollutants every day. Among them, endocrine disruptors are particularly harmful to human health. Bisphenol A (BPA) is a xenoestrogen that has been shown to disrupt the endocrine system and cause reproductive toxicity. In this study, we aimed to verify the potential relationship between BPA and miscarriage involving the formation of neutrophil extracellular traps (NETs). Blood samples were collected from healthy women and women who had miscarriage in the first trimester of pregnancy. The serum levels of cytoplasmic anti-PR3 antibody and perinuclear anti-MPO antibody were determined using an immunoenzymatic method. The concentrations of key proinflammatory proteins TNF-α and MCP-1, as well as NADPH oxidase subunits NOX1 and NCF2, were also measured in the serum samples. The serum concentration of BPA was determined using gas chromatography. The results showed that the concentrations of BPA were significantly elevated in the serum of women who had miscarriage compared to the control group, with the highest concentration found in the “NETs-positive” group. The levels of MCP-1 and TNF-α were significantly higher in the “NETs-positive” group compared to the “NETs-negative” and control group. The levels of NOX1 and NCF2 were also higher in the “NETs-positive” group compared to the “NETs-negative” group. The study showed that BPA could play a role in the course of miscarriage through the formation of NETs. The results indicate the need to limit the exposure of women planning pregnancy to xenoestrogens, including BPA.
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Affiliation(s)
- Wioleta Justyna Omeljaniuk
- Department of Analysis and Bioanalysis of Medicines, Medical University of Bialystok, Bialystok, Poland.
| | | | - Marzena Garley
- Department of Immunology, Medical University of Bialystok, Bialystok, Poland
| | | | - Jan Czerniecki
- Biology and Pathology of Human Reproduction, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences in Olsztyn, Olsztyn, Poland
| | - Ewa Jabłońska
- Department of Immunology, Medical University of Bialystok, Bialystok, Poland
| | | | - Wojciech Miltyk
- Department of Analysis and Bioanalysis of Medicines, Medical University of Bialystok, Bialystok, Poland
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Valenzuela-Melgarejo FJ, Lagunas C, Carmona-Pastén F, Jara-Medina K, Delgado G. Supraphysiological Role of Melatonin Over Vascular Dysfunction of Pregnancy, a New Therapeutic Agent? Front Physiol 2021; 12:767684. [PMID: 34867473 PMCID: PMC8635235 DOI: 10.3389/fphys.2021.767684] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 10/07/2021] [Indexed: 11/25/2022] Open
Abstract
Hypertension can be induced by the disruption of factors in blood pressure regulation. This includes several systems such as Neurohumoral, Renin-angiotensin-aldosterone, the Circadian clock, and melatonin production, which can induce elevation and non-dipping blood pressure. Melatonin has a supraphysiological role as a chronobiotic agent and modulates vascular system processes via pro/antiangiogenic factors, inflammation, the immune system, and oxidative stress regulation. An elevation of melatonin production is observed during pregnancy, modulating the placenta and fetus’s physiological functions. Their impairment production can induce temporal desynchronization of cell proliferation, differentiation, or invasion from trophoblast cells results in vascular insufficiencies, elevating the risk of poor fetal/placental development. Several genes are associated with vascular disease and hypertension during pregnancy via impaired inflammatory response, hypoxia, and oxidative stress, such as cytokines/chemokines IL-1β, IL-6, IL-8, and impairment expression in endothelial cells/VSMCs of HIF1α and eNOS genes. Pathological placentas showed differentially expressed genes (DEG), including vascular genes as CITED2, VEGF, PL-II, PIGF, sFLT-1, and sENG, oncogene JUNB, scaffolding protein CUL7, GPER1, and the pathways of SIRT/AMPK and MAPK/ERK. Additionally, we observed modification of subunits of NADPH oxidase and extracellular matrix elements, i.e., Glypican and Heparanase and KCa channel. Mothers with a low level of melatonin showed low production of proangiogenic factor VEGF, increasing the risk of preeclampsia, premature birth, and abortion. In contrast, melatonin supplementation can reduce systolic pressure, prevent oxidative stress, induce the activation of the antioxidants system, and lessen proteinuria and serum level of sFlt-1. Moreover, melatonin can repair the endothelial damage from preeclampsia at the placenta level, increasing PIGF, Nrf-2, HO-1 production and reducing critical markers of vascular injury during the pregnancy. Melatonin also restores the umbilical and uterine blood flow after oxidative stress and inhibits vascular inflammation and VCAM-1, Activin-A, and sEng production. The beneficial effects of melatonin over pathological pregnancies can be partially observed in normal pregnancies, suggesting the dual role of/over placental physiology could contribute to protection and have therapeutic applications in vascular pathologies of pregnancies in the future.
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Affiliation(s)
- Francisco J Valenzuela-Melgarejo
- Laboratory of Molecular Cell Biology, Department of Basic Sciences, Universidad del Bío-Bío, Campus Fernando May, Chillán, Chile
| | - Constanza Lagunas
- Laboratory of Molecular Cell Biology, Department of Basic Sciences, Universidad del Bío-Bío, Campus Fernando May, Chillán, Chile
| | - Fabiola Carmona-Pastén
- Laboratory of Molecular Cell Biology, Department of Basic Sciences, Universidad del Bío-Bío, Campus Fernando May, Chillán, Chile
| | - Kevins Jara-Medina
- Laboratory of Molecular Cell Biology, Department of Basic Sciences, Universidad del Bío-Bío, Campus Fernando May, Chillán, Chile
| | - Gustavo Delgado
- Laboratory of Molecular Cell Biology, Department of Basic Sciences, Universidad del Bío-Bío, Campus Fernando May, Chillán, Chile
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Kang Q, Li W, Xiao J, Yu N, Fan L, Sha M, Ma S, Wu J, Chen S. Identification of potential crucial genes associated with early-onset preeclampsia via bioinformatic analysis. Pregnancy Hypertens 2021; 24:27-36. [PMID: 33640831 DOI: 10.1016/j.preghy.2021.02.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 01/04/2021] [Accepted: 02/16/2021] [Indexed: 12/23/2022]
Abstract
INTRODUCTION Early-onset preeclampsia is a pregnancy complication associated with high maternal and perinatal morbidity, mortality. Intense efforts have been made to elucidate the pathogenesis, but the molecular mechanism is still elusive. This study aimed to identify potential key genes related to early-onset preeclampsia, and to obtain a better understanding of the molecular mechanisms of this disease. METHODS We performed a multi-step integrative bioinformatics analysis of microarray dataset GSE74341 downloaded from Gene Expression Omnibus (GEO) database including 7 early-onset preeclampsia and 5 gestational age matched normotensive controls. The differentially expressed genes (DEGs) were identified using the "limma" package, and their potential functions were predicted by Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis. Furthermore, the protein-protein interaction network (PPI) was obtained from the STRING database and the PPI network was visualized by Cytoscape software. Then, hub modules and hub genes were screened out from the PPI network, and enrichment analysis was performed for them. Also, validation of hub genes expression in early-onset PE was down by using microarray dataset GSE44711. RESULTS A total of 628 DEGs (256 down- and 372 up-regulated) were identified in early-onset PE compared to controls. A total of 4 significant hub modules and 26 significant hub genes were identified. CONCLUSION In conclusion, the DEGs related to cell-cell or cell-extracellular matrix interaction (ITGA5, SPP1, LUM, VCAN, APP), placenta metabolic or oxidative stress (CCR7, NT5E, CYBB) were predicted to be newly potential crucial genes that may play significant roles in the pathogenesis of early-onset PE.
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Affiliation(s)
- Qingling Kang
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Wei Li
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Juan Xiao
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Nan Yu
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Lei Fan
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Menghan Sha
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Songyan Ma
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Jianli Wu
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Suhua Chen
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China.
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Yao T, Hou H, Liu G, Wu J, Qin Z, Sun Y, Jin X, Chen J, Chen Y, Xu Z. Quantitative proteomics suggest a potential link between early embryonic death and trisomy 16. Reprod Fertil Dev 2020; 31:1116-1126. [PMID: 30922443 DOI: 10.1071/rd17319] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Accepted: 01/26/2019] [Indexed: 01/04/2023] Open
Abstract
Activation of extracellular signal-regulated kinase (ERK) signalling, alteration of the uterine microenvironment and a reduction in human chorionic gonadotrophin production have been linked with fetal trisomy 16-induced early embryonic death (EED). However, the detailed biological mechanism of EED remains unclear. Using quantitative proteomics we successfully screened differentially expressed proteins in the villous tissues from patients with EED and fetal trisomy 16 (EEDT16), patients with EED but normal fetal chromosomes (EEDNC) and patients undergoing elective abortion with normal fetal chromosomes (EANC) as the reference group. Compared with the reference group, we identified 337 and 220 differentially expressed proteins in EEDT16 patients and EEDNC patients respectively; these were involved in critical biological processes including immune response, superoxide metabolism, inflammatory responses and so on. We found that differential expression of immunological function-related molecules, such as human leukocyte antigen-g (HLA-G), HLA-C, Fc Fragment Of IgG Receptor III (FcγR III), also named CD16, interleukin 18 (IL-18) and transforming growth factor β1 (TGF-β1), might induce EED in both EEDT16 and EEDNC patients. More severe immunological dysfunction was observed in EEDT16 patients than that in EEDNC patients. Furthermore, differential expression of implantation and invasion-related molecules, such as cytochrome b-245 light chain (CYBA), neutrophil cytosol factor 2 (NCF2), Mitogen-activated protein kinase kinase kinase 4 (MAP3K4), matrix metalloproteinase 2 (MMP2), MMP9 and tumour necrosis factor α (TNF-α) might induce EED in both EEDT16 and EEDNC patients, although more severe dysfunction in the implantation and invasion ability of villous tissues was observed in EEDT16 patients.
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Affiliation(s)
- Ting Yao
- Department of Obstetrics and Gynaecology, Tianjin Nankai Hospital, No. 6 Changjiang Road, Nankai District, Tianjin 300100, China; and Central Laboratory, Logistics University of Chinese People's Armed Police Force, Tianjin 300309, China
| | - Haiyan Hou
- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China; and Department of Obstetrics and Gynaecology, Affiliated Hospital of the Chinese People's Armed Police Force Logistics College, Tianjin 300162, China
| | - Guozhong Liu
- Department of Obstetrics and Gynaecology, CongraMarie Women and Children's Hospital, Tianjin 300100, China
| | - Jun Wu
- Program in Public Health, Anteater Instruction & Research Bldg (AIRB) # 2034, University of California, Irvine CA 92697-3957, USA
| | - Zhe Qin
- Central Laboratory, Logistics University of Chinese People's Armed Police Force, Tianjin 300309, China; and Department of Obstetrics and Gynaecology, Affiliated Hospital of the Chinese People's Armed Police Force Logistics College, Tianjin 300162, China
| | - Yang Sun
- Department of Obstetrics and Gynaecology, Affiliated Hospital of the Chinese People's Armed Police Force Logistics College, Tianjin 300162, China
| | - Xiaohan Jin
- Department of Obstetrics and Gynaecology, Affiliated Hospital of the Chinese People's Armed Police Force Logistics College, Tianjin 300162, China; and Tianjin Key Laboratory of Cardiovascular Remodelling and Target Organ Injury, Pingjin Hospital Heart Centre, Tianjin 300162, China
| | - Jun Chen
- Department of Obstetrics and Gynaecology, Affiliated Hospital of the Chinese People's Armed Police Force Logistics College, Tianjin 300162, China
| | - Yaqiong Chen
- Department of Obstetrics and Gynaecology, Affiliated Hospital of the Chinese People's Armed Police Force Logistics College, Tianjin 300162, China; and Corresponding authors. Emails: ;
| | - Zhongwei Xu
- Department of Obstetrics and Gynaecology, Affiliated Hospital of the Chinese People's Armed Police Force Logistics College, Tianjin 300162, China; and Tianjin Key Laboratory of Cardiovascular Remodelling and Target Organ Injury, Pingjin Hospital Heart Centre, Tianjin 300162, China; and Corresponding authors. Emails: ;
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Sánchez-Santos A, Martínez-Hernández MG, Contreras-Ramos A, Ortega-Camarillo C, Baiza-Gutman LA. Hyperglycemia-induced mouse trophoblast spreading is mediated by reactive oxygen species. Mol Reprod Dev 2018; 85:303-315. [PMID: 29392783 DOI: 10.1002/mrd.22965] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 01/26/2018] [Accepted: 01/31/2018] [Indexed: 12/13/2022]
Abstract
During embryo implantation, the outer layer of the blastocyst interacts with the endometrium giving rise to the development of the trophoblast cell lineage. The cells in this lineage participate in the penetration of endometrium due to their motility and invasive properties. The mechanisms that regulate the differentiation and invasive ability of these cells are essential for the establishment and maintenance of an efficient exchange between maternal and fetal tissues during pregnancy. In this context, hyperglycemia can induce oxidative stress causing alterations in the placenta. This study evaluated the role of reactive oxygen species (ROS) in the actions of high glucose concentration (HG) on trophoblast spreading and the expression of extracellular proteases in cultured mouse conceptuses. Blastocysts from gestational day 4 (GD4) were cultured until GD7 in HAM-F10 medium and further treated for 48 hr with HG (25 mM glucose) from GD7 to GD9. This treatment induced larger trophoblast outgrowths and increased ROS concentration, which was associated with increased expression levels of urokinase-type plasminogen activator (PLAU), plasminogen activator inhibitor 1 (PAI-1), and matrix metalloproteinase 9 (MMP-9). These effects were prevented by treatment with the non-specific antioxidant N-acetylcysteine (NAC) or apocynin, an inhibitor of NADPH oxidase. Our data suggest that the HG-induced trophoblast spreading and the expression of PLAU, PAI-1, and MMP-9 were mediated by the production of ROS via NADPH oxidase activity. Our results shed light on placental alterations in gestational diabetes mellitus.
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Affiliation(s)
- Alejandra Sánchez-Santos
- Laboratorio de Biología del Desarrollo, Unidad de Morfología y Función, FES-Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, Estado de México, México.,Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, C.P. Ciudad de México, México
| | - María G Martínez-Hernández
- Laboratorio de Biología del Desarrollo, Unidad de Morfología y Función, FES-Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, Estado de México, México
| | - Alejandra Contreras-Ramos
- Departamento de Biología del Desarrollo y Teratogénesis Experimental, Hospital Infantil de México Federico Gómez, México DF, México
| | - Clara Ortega-Camarillo
- Unidad de Investigación Médica en Bioquímica, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México DF, México
| | - Luis A Baiza-Gutman
- Laboratorio de Biología del Desarrollo, Unidad de Morfología y Función, FES-Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, Estado de México, México.,Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, C.P. Ciudad de México, México
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Sarmiento D, Montorfano I, Cerda O, Cáceres M, Becerra A, Cabello-Verrugio C, Elorza AA, Riedel C, Tapia P, Velásquez LA, Varela D, Simon F. Increases in reactive oxygen species enhance vascular endothelial cell migration through a mechanism dependent on the transient receptor potential melastatin 4 ion channel. Microvasc Res 2014; 98:187-96. [PMID: 24518820 DOI: 10.1016/j.mvr.2014.02.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Revised: 12/17/2013] [Accepted: 02/03/2014] [Indexed: 01/19/2023]
Abstract
A hallmark of severe inflammation is reactive oxygen species (ROS) overproduction induced by increased inflammatory mediators secretion. During systemic inflammation, inflammation mediators circulating in the bloodstream interact with endothelial cells (ECs) raising intracellular oxidative stress at the endothelial monolayer. Oxidative stress mediates several pathological functions, including an exacerbated EC migration. Because cell migration critically depends on calcium channel-mediated Ca(2+) influx, the molecular identification of the calcium channel involved in oxidative stress-modulated EC migration has been the subject of intense investigation. The transient receptor potential melastatin 4 (TRPM4) protein is a ROS-modulated non-selective cationic channel that performs several cell functions, including regulating intracellular Ca(2+) overload and Ca(2+) oscillation. This channel is expressed in multiple tissues, including ECs, and contributes to the migration of certain immune cells. However, whether the TRPM4 ion channel participates in oxidative stress-mediated EC migration is not known. Herein, we investigate whether oxidative stress initiates or enhances EC migration and study the role played by the ROS-modulated TRPM4 ion channel in oxidative stress-mediated EC migration. We demonstrate that oxidative stress enhances, but does not initiate, EC migration in a dose-dependent manner. Notably, we demonstrate that the TRPM4 ion channel is critical in promoting H2O2-enhanced EC migration. These results show that TRPM4 is a novel pharmacological target for the possible treatment of severe inflammation and other oxidative stress-mediated inflammatory diseases.
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Affiliation(s)
- Daniela Sarmiento
- Departamento de Ciencias Biológicas, Facultad de Ciencias Biológicas, Universidad Andres Bello, Santiago, Chile
| | - Ignacio Montorfano
- Departamento de Ciencias Biológicas, Facultad de Ciencias Biológicas, Universidad Andres Bello, Santiago, Chile
| | - Oscar Cerda
- Programa de Biología Celular y Molecular, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Mónica Cáceres
- Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Alvaro Becerra
- Departamento de Ciencias Biológicas, Facultad de Ciencias Biológicas, Universidad Andres Bello, Santiago, Chile
| | - Claudio Cabello-Verrugio
- Departamento de Ciencias Biológicas, Facultad de Ciencias Biológicas, Universidad Andres Bello, Santiago, Chile
| | - Alvaro A Elorza
- Departamento de Ciencias Biológicas, Facultad de Ciencias Biológicas, Universidad Andres Bello, Santiago, Chile; Millennium Institute on Immunology and Immunotherapy, Santiago, Chile
| | - Claudia Riedel
- Departamento de Ciencias Biológicas, Facultad de Ciencias Biológicas, Universidad Andres Bello, Santiago, Chile; Millennium Institute on Immunology and Immunotherapy, Santiago, Chile
| | - Pablo Tapia
- Departamento de Medicina Intensiva, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Luis A Velásquez
- Center for Integrative Medicine and Innovative Science (CIMIS), Facultad de Medicina, Universidad Andres Bello, Santiago, Chile; Centro para el Desarrollo de la Nanociencia y Nanotecnología, Universidad de Santiago de Chile, Santiago, Chile
| | - Diego Varela
- Programa de Fisiopatología, Centro de Estudios Moleculares de la Célula and Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Felipe Simon
- Departamento de Ciencias Biológicas, Facultad de Ciencias Biológicas, Universidad Andres Bello, Santiago, Chile; Millennium Institute on Immunology and Immunotherapy, Santiago, Chile.
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Lee CL, Lam MPY, Lam KKW, Leung CON, Pang RTK, Chu IK, Wan THL, Chai J, Yeung WSB, Chiu PCN. Identification of CD147 (basigin) as a mediator of trophoblast functions. Hum Reprod 2013; 28:2920-9. [PMID: 24014600 DOI: 10.1093/humrep/det355] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
STUDY QUESTION Does CD147 regulate trophoblast functions in vitro? SUMMARY ANSWER CD147 exists as a receptor complex on human trophoblast and regulates the implantation, invasion and differentiation of trophoblast. WHAT IS KNOWN ALREADY CD147 is a membrane protein implicated in a variety of physiological and pathological conditions due to its regulation of cell-cell recognition, cell differentiation and tissue remodeling. Reduced placental CD147 expression is associated with pre-eclampsia, but the mechanism of actions remains unclear. STUDY DESIGN, SIZE, DURATION A loss of function approach or functional blocking antibody was used to study the function of CD147 in primary human cytotrophoblasts isolated from first trimester termination of pregnancy and/or in the BeWo cell line, which possesses characteristics of human cytotrophoblasts. PARTICIPANTS/MATERIALS, SETTING METHODS CD147 expression was analyzed by immunofluorescence staining and western blotting. CD147-associated protein complex on plasma membrane were separated by blue native gel electrophoresis and identified by reversed-phase liquid chromatography coupled with quadrupole time-of-flight hybrid mass spectrometer. Cell proliferation and invasion were determined by fluorometric cell proliferation assays and transwell invasion assays, respectively. Matrix metalloproteinases (MMPs) and urokinase plasminogen activator (uPA) activities were measured by gelatin gel zymography and uPA assay kits, respectively. Cell migration was determined by wound-healing assays. Cell fusion was analyzed by immunocytochemistry staining of E-cadherin and 4',6-diamidino-2-phenylindole. The transcripts of matrix proteinases and trophoblast lineage markers were measured by quantitative PCR. Extracellular signal-regulated kinase (ERK) activation was analyzed by western blot using antibodies against ERKs. MAIN RESULTS AND THE ROLE OF CHANCE CD147 exists as protein complexes on the plasma membrane of primary human cytotrophoblasts and BeWo cells. Several known CD147-interacting partners, including integrin β1 and monocarboxylate transporter-1, were identified. Suppression of CD147 by siRNA significantly (P < 0.05) reduced trophoblast-endometrial cell interaction, cell invasion, syncytialization, differentiation and ERK activation of BeWo cells. Consistently, anti-CD147 functional blocking antibody suppressed the invasiveness of primary human cytotrophoblasts. The reduced invasiveness was probably due to the restrained (P < 0.05) enzyme activities of MMP-2, MMP-9 and uPA. LIMITATIONS, REASONS FOR CAUTION Most of the above findings are based on BeWo cell lines. These results need to be confirmed with human first trimester primary cytotrophoblast. WIDER IMPLICATIONS OF THE FINDINGS This is the first study on the role of CD147 in trophoblast function. Further investigation on the function of CD147 and its associated protein complexes will enhance our understanding on human placentation. STUDY FUNDING/COMPETING INTEREST(S) This work was supported in part by the University of Hong Kong Grant 201011159200. The authors have no competing interests to declare.
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Affiliation(s)
- Cheuk-Lun Lee
- Department of Obstetrics and Gynaecology, University of Hong Kong, Pokfulam Road, Hong Kong, China
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