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Bollig KJ, Senapati S, Takacs P, Robins JC, Haisenleder DJ, Beer LA, Speicher DW, Koelper NC, Barnhart KT. Evaluation of novel biomarkers for early pregnancy outcome prediction†. Biol Reprod 2024; 110:548-557. [PMID: 38011676 PMCID: PMC10941089 DOI: 10.1093/biolre/ioad162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 10/19/2023] [Accepted: 11/20/2023] [Indexed: 11/29/2023] Open
Abstract
OBJECTIVE To assess performance and discriminatory capacity of commercially available enzyme-linked immunosorbent assays of biomarkers for predicting first trimester pregnancy outcome in a multi-center cohort. DESIGN In a case-control study at three academic centers of women with pain and bleeding in early pregnancy, enzyme-linked immunosorbent assays of biomarkers were screened for assay performance. Performance was assessed via functional sensitivity, assay reportable range, recovery/linearity, and intra-assay precision (%Coefficient of Variation). Top candidates were analyzed for discriminatory capacity for viability and location among 210 women with tubal ectopic pregnancy, viable intrauterine pregnancy, or miscarriage. Assay discrimination was assessed by visual plots, area under the curve with 95% confidence intervals, and measures of central tendency with two-sample t-tests. RESULTS Of 25 biomarkers evaluated, 22 demonstrated good or acceptable assay performance. Transgelin-2, oviductal glycoprotein, and integrin-linked kinase were rejected due to poor performance. The best biomarkers for discrimination of pregnancy location were pregnancy-specific beta-1-glycoprotein 9, pregnancy-specific beta-1-glycoprotein 1, insulin-like growth factor binding protein 1, kisspeptin (KISS1), pregnancy-specific beta-1-glycoprotein 3, and beta parvin (PARVB). The best biomarkers for discrimination of pregnancy viability were pregnancy-specific beta-1-glycoprotein 9, pregnancy-specific beta-1-glycoprotein 3, EH domain-containing protein 3, KISS1, WAP four-disulfide core domain protein 2 (HE4), quiescin sulfhydryl oxidase 2, and pregnancy-specific beta-1-glycoprotein 1. CONCLUSION Performance of commercially available enzyme-linked immunosorbent assays was acceptable for a panel of novel biomarkers to predict early pregnancy outcome. Of these, six and seven candidates demonstrated good discriminatory capacity of pregnancy location and viability, respectively, when validated in a distinct external population. Four markers demonstrated good discrimination for both location and viability.
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Affiliation(s)
- Kassie J Bollig
- Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia, PA, USA
| | - Suneeta Senapati
- Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia, PA, USA
| | - Peter Takacs
- Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Norfolk, VA, USA
| | - Jared C Robins
- Department of Obstetrics and Gynecology, Northwestern University, Chicago, IL, USA
| | - Daniel J Haisenleder
- Department of Internal Medicine and the Center for Research in Reproduction, University of Virginia, Charlottesville, VA, USA
| | - Lynn A Beer
- Center for Systems & Computational Biology, The Wistar Institute, Philadelphia, PA, USA
| | - David W Speicher
- Center for Systems & Computational Biology, The Wistar Institute, Philadelphia, PA, USA
| | - Nathanael C Koelper
- Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia, PA, USA
| | - Kurt T Barnhart
- Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia, PA, USA
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Kashiwagi H, Mariya T, Umemoto M, Ogawa S, Hirohashi Y, Fujibe Y, Kubo T, Someya M, Baba T, Ishioka S, Torigoe T, Saito T. Pregnancy-specific beta-1-glycoprotein 6 is a potential novel diagnostic biomarker of placenta accreta spectrum. Med Mol Morphol 2024; 57:35-44. [PMID: 37831187 DOI: 10.1007/s00795-023-00371-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Accepted: 09/20/2023] [Indexed: 10/14/2023]
Abstract
Early diagnosis is essential for the safer perinatal management of placenta accreta spectrum (PAS). We used transcriptome analysis to investigate diagnostic maternal serum biomarkers and the mechanisms of PAS development. We analyzed eight formalin-fixed paraffin-embedded placental specimens from two placenta increta and three placenta percreta cases who underwent cesarean hysterectomy at Sapporo Medical University Hospital between 2013 and 2019. Invaded placental regions were isolated from the uterine myometrium and RNA was extracted. The transcriptome difference between normal placenta and PAS was analyzed by microarray analysis. The PAS group showed markedly decreased expression of placenta-specific genes such as LGALS13 and the pregnancy-specific beta-1-glycoprotein (PSG) family. Term enrichment analysis revealed changes in genes related to cellular protein catabolic process, female pregnancy, autophagy, and metabolism of lipids. From the highly dysregulated genes in the PAS group, we investigated the expression of PSG family members, which are secreted into the intervillous space and can be detected in maternal serum from the early stage of pregnancy. The gene expression level of PSG6 in particular was progressively decreased from placenta increta to percreta. The PSG family, especially PSG6, is a potential biomarker for PAS diagnosis.
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Affiliation(s)
- Hazuki Kashiwagi
- Department of Obstetrics and Gynecology, Sapporo Medical University School of Medicine, South 1 West 17, Chuo-ku, Sapporo, 060-8556, Japan
| | - Tasuku Mariya
- Department of Obstetrics and Gynecology, Sapporo Medical University School of Medicine, South 1 West 17, Chuo-ku, Sapporo, 060-8556, Japan.
| | - Mina Umemoto
- Department of Obstetrics and Gynecology, Sapporo Medical University School of Medicine, South 1 West 17, Chuo-ku, Sapporo, 060-8556, Japan
| | - Shiori Ogawa
- Department of Obstetrics and Gynecology, Sapporo Medical University School of Medicine, South 1 West 17, Chuo-ku, Sapporo, 060-8556, Japan
| | - Yoshihiko Hirohashi
- Department of Pathology 1st, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Yuya Fujibe
- Department of Obstetrics and Gynecology, Sapporo Medical University School of Medicine, South 1 West 17, Chuo-ku, Sapporo, 060-8556, Japan
| | - Terufumi Kubo
- Department of Pathology 1st, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Masayuki Someya
- Department of Obstetrics and Gynecology, Sapporo Medical University School of Medicine, South 1 West 17, Chuo-ku, Sapporo, 060-8556, Japan
| | - Tsuyoshi Baba
- Department of Obstetrics and Gynecology, Sapporo Medical University School of Medicine, South 1 West 17, Chuo-ku, Sapporo, 060-8556, Japan
| | - Shinichi Ishioka
- Department of Obstetrics and Gynecology, Sapporo Medical University School of Medicine, South 1 West 17, Chuo-ku, Sapporo, 060-8556, Japan
| | - Toshihiko Torigoe
- Department of Pathology 1st, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Tsuyoshi Saito
- Department of Obstetrics and Gynecology, Sapporo Medical University School of Medicine, South 1 West 17, Chuo-ku, Sapporo, 060-8556, Japan
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Toprak K, Yıldız Z, Akdemir S, Esen K, Kada R, Can Güleç N, Omar B, Biçer A, Demirbağ R. Low pregnancy-specific beta-1-glycoprotein is associated with nondipper hypertension and increased risk of preeclampsia in pregnant women with newly diagnosed chronic hypertension. Scand J Clin Lab Invest 2023; 83:479-488. [PMID: 37887078 DOI: 10.1080/00365513.2023.2275083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 10/20/2023] [Indexed: 10/28/2023]
Abstract
Chronic hypertension is one of the major risk factors for preeclampsia. Pregnancy-specific beta-1-glycoprotein (PSG-1) is a protein that plays a critical role in fetomaternal immune modulation and has been shown to be closely associated with pregnancy adverse events such as preeclampsia. It is also known that PSG-1 and its source placenta are associated with many molecular pathways associated with blood pressure regulation. In addition, the nondipping pattern (NDP) of chronic hypertension has been shown to be an independent risk factor for preeclampsia. Dipper individuals experience a notable nighttime drop in blood pressure, typically around 10% or more compared to daytime levels, while nondipper individuals show a smaller nighttime blood pressure decrease, indicating potential circadian blood pressure regulation disruption. In this context, we aimed to reveal the relationship between PSG-1, NDP and preeclampsia in this study. A total of 304 pregnant women who were newly diagnosed in the first trimester and started on antihypertensive medication were included in this study. All subjects performed 24-h ambulatory blood pressure monitoring twice throughout pregnancy, the first in the 1. trimester to confirm the diagnosis of hypertension and the second between 20+0 and 21+1 gestational weeks to determine the dipper-nondipper status of hypertension. Subjects were grouped as dipper and nondipper according to blood pressure, and groups were compared in terms of PSG-1 levels. In this study, low PSG-1 levels and NDP were independently associated with preeclampsia. Findings from this study suggest that PSG-1 may play an important role in the causal relationship between NDP and preeclampsia.
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Affiliation(s)
- Kenan Toprak
- Department of Cardiology, Faculty of Medicine, Harran University, Sanliurfa, Turkey
| | - Zafer Yıldız
- Department of Obstetrics and Gynecology, Siverek State Hospital, Sanliurfa, Turkey
| | - Selim Akdemir
- Department of Obstetrics and Gynecology, Siverek State Hospital, Sanliurfa, Turkey
| | - Kamil Esen
- Department of Obstetrics and Gynecology, Siverek State Hospital, Sanliurfa, Turkey
| | - Rahime Kada
- Department of Obstetrics and Gynecology, Faculty of Medicine, Harran University, Sanliurfa, Turkey
| | - Nuran Can Güleç
- Department of Obstetrics and Gynecology, Umraniye Training and Research Hospital, Istanbul, Türkiye
| | - Bahadır Omar
- Department of Cardiology, Umraniye Training and Research Hospital, Istanbul, Türkiye
| | - Asuman Biçer
- Department of Cardiology, Faculty of Medicine, Harran University, Sanliurfa, Turkey
| | - Recep Demirbağ
- Department of Cardiology, Faculty of Medicine, Harran University, Sanliurfa, Turkey
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Jia L, Huang X, Peng H, Jia Y, Zhang R, Wei Y, Wei M, Wang R, Li H, He Q, Wang K. Pregnancy-specific beta-1-glycoprotein 1-enriched exosomes are involved in the regulation of vascular endothelial cell function during pregnancy. Placenta 2023; 139:138-147. [PMID: 37392715 DOI: 10.1016/j.placenta.2023.06.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 05/29/2023] [Accepted: 06/23/2023] [Indexed: 07/03/2023]
Abstract
INTRODUCTION Pregnancy is a dynamic time period associated with significant physiological changes in the cardiovascular system. It is well known that during pregnancy, the placenta secretes a variety of molecular signals, including exosomes, into the maternal circulation to adapt to increased blood volume and maintain blood pressure at normotensive levels. METHODS In the present study, we compared the effects of exosomes derived from the peripheral blood serum of nonpregnant women (NP-Exo) and pregnant women with uncomplicated pregnancy (P-Exo) on endothelial cell function. We also analyzed the proteomic profiles of these two groups of exosomes and the molecular mechanisms underlying the effect of exosome cargoes on vascular endothelial cell function. RESULTS We found that P-Exo were positively involved in regulating the function of human umbilical vein endothelial cell (HUVEC) and promoting the release of nitric oxide (NO). Furthermore, we revealed that trophoblast-derived pregnancy-specific beta-1-glycoprotein 1 (PSG1)-enriched exosomes treatment induced the promotion of HUVEC proliferation and migration as well as the release of NO. In addition, we found that P-Exo maintained blood pressure at normal levels in mice. DISCUSSION These results suggested that PSG1-enriched exosomes derived from maternal peripheral blood regulate the function of vascular endothelial cells and play an important role in maintaining maternal blood pressure during pregnancy.
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Affiliation(s)
- Linyan Jia
- Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, China; Clinical and Translational Research Center, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Institute of Maternal-Fetal Medicine and Gynecologic Oncology, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Xiaojie Huang
- Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, China; Clinical and Translational Research Center, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Institute of Maternal-Fetal Medicine and Gynecologic Oncology, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Hao Peng
- Clinical and Translational Research Center, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Institute of Maternal-Fetal Medicine and Gynecologic Oncology, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Yuanhui Jia
- Clinical and Translational Research Center, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Institute of Maternal-Fetal Medicine and Gynecologic Oncology, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Ruonan Zhang
- Clinical and Translational Research Center, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Institute of Maternal-Fetal Medicine and Gynecologic Oncology, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Yingying Wei
- Clinical and Translational Research Center, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Institute of Maternal-Fetal Medicine and Gynecologic Oncology, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Mengtian Wei
- Clinical and Translational Research Center, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Institute of Maternal-Fetal Medicine and Gynecologic Oncology, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Ruixue Wang
- Clinical and Translational Research Center, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Institute of Maternal-Fetal Medicine and Gynecologic Oncology, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Han Li
- Clinical and Translational Research Center, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Institute of Maternal-Fetal Medicine and Gynecologic Oncology, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Qizhi He
- Department of Pathology, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Institute of Maternal-Fetal Medicine and Gynecologic Oncology, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China.
| | - Kai Wang
- Clinical and Translational Research Center, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Institute of Maternal-Fetal Medicine and Gynecologic Oncology, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China.
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Constantin A, Constantin R, Achim F, Socea B, Predescu D. Pregnancy and Gastric Cancer: A Narrative Review. Diagnostics (Basel) 2023; 13:diagnostics13111909. [PMID: 37296761 DOI: 10.3390/diagnostics13111909] [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: 02/27/2023] [Revised: 05/22/2023] [Accepted: 05/26/2023] [Indexed: 06/12/2023] Open
Abstract
Cases of digestive cancers diagnosed during pregnancy are rare. The increasing prevalence of pregnancy in women aged 30-39 years (and not exceptionally 40-49 years) could explain the frequent co-occurrence of cancers and pregnancy. The diagnosis of digestive cancers in pregnancy is difficult due to the overlap between neoplasm symptomatology and the clinical picture of pregnancy. A paraclinical evaluation may also be difficult depending on the trimester of the pregnancy. Diagnosis is also delayed by practitioners' hesitation to use invasive investigations (imaging, endoscopy, etc.) due to fetal safety concerns. Therefore, digestive cancers are often diagnosed during pregnancy in advanced stages, where complications such as occlusions, perforations, and cachexia have already arisen. In this review, we highlight the epidemiology, clinical aspects, paraclinical evaluation, and particularities of the diagnosis and treatment of gastric cancer during pregnancy.
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Affiliation(s)
- Adrian Constantin
- Department of Esophageal and General Surgery, Sf. Maria Clinical Hospital Bucharest, 011192 Bucharest, Romania
- Faculty of Medicine, Carol Davila University of Medicine and Pharmacy Bucharest, 050474 Bucharest, Romania
| | - Roxana Constantin
- Department of Obstetrics and Gynecology, Sanador Hospital, 010991 Bucharest, Romania
| | - Florin Achim
- Department of Esophageal and General Surgery, Sf. Maria Clinical Hospital Bucharest, 011192 Bucharest, Romania
- Faculty of Medicine, Carol Davila University of Medicine and Pharmacy Bucharest, 050474 Bucharest, Romania
| | - Bogdan Socea
- Faculty of Medicine, Carol Davila University of Medicine and Pharmacy Bucharest, 050474 Bucharest, Romania
- Department of Surgery, Sf. Pantelimon Emergency Clinical Hospital, 021659 Bucharest, Romania
| | - Dragos Predescu
- Department of Esophageal and General Surgery, Sf. Maria Clinical Hospital Bucharest, 011192 Bucharest, Romania
- Faculty of Medicine, Carol Davila University of Medicine and Pharmacy Bucharest, 050474 Bucharest, Romania
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Pregnancy-Specific Glycoprotein 9 Enhances Store-Operated Calcium Entry and Nitric Oxide Release in Human Umbilical Vein Endothelial Cells. Diagnostics (Basel) 2023; 13:diagnostics13061134. [PMID: 36980442 PMCID: PMC10047280 DOI: 10.3390/diagnostics13061134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 03/10/2023] [Accepted: 03/11/2023] [Indexed: 03/19/2023] Open
Abstract
We explored changes in pregnancy-specific glycoprotein 9 (PSG9) levels in the serum of patients with preeclampsia and the effects and underlying mechanisms of PSG9 effects on calcium (Ca2+) homeostasis and nitric oxide (NO) release in human umbilical vein endothelial cells (HUVECs). Western blotting was used to detect protein expression levels, and an NO fluorescence probe was used to examine NO production. Intracellular Ca2+ concentrations were measured using a Ca2+-sensitive fluorescent dye under a fluorescence microscope. Compared with those in healthy pregnant women, serum PSG9 levels were significantly decreased in patients with preeclampsia. PSG9 (0.1 μg/mL) treatment of HUVECs significantly enhanced the expression levels of store-operated calcium entry (SOCE) channel proteins Orai1 and Orai2, but not Orai3, and of endothelial nitric oxide synthase (eNOS) and NO production. Pretreatment with an inhibitor of SOCE (BTP2) abolished PSG9-enhanced Orai1, Orai2, and eNOS expression levels and NO production in HUVECs. The mechanisms underlying SOCE that were PSG9 enhanced in HUVECs appear to involve the Ca2+/eNOS/NO signaling pathway. These findings suggest that serum PSG9 levels may be a potential biomarker for monitoring the occurrence or development of preeclampsia in pregnancy and that PSG9 may be a potential therapeutic target for the treatment of preeclampsia.
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Roles of N-linked glycosylation and glycan-binding proteins in placentation: trophoblast infiltration, immunomodulation, angiogenesis, and pathophysiology. Biochem Soc Trans 2023; 51:639-653. [PMID: 36929183 DOI: 10.1042/bst20221406] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 02/19/2023] [Accepted: 02/22/2023] [Indexed: 03/18/2023]
Abstract
Protein N-linked glycosylation is a structurally diverse post-translational modification that stores biological information in a larger order of magnitude than other post-translational modifications such as phosphorylation, ubiquitination and acetylation. This gives N-glycosylated proteins a diverse range of properties and allows glyco-codes (glycan-related information) to be deciphered by glycan-binding proteins (GBPs). The intervillous space of the placenta is richly populated with membrane-bound and secreted glycoproteins. Evidence exists to suggest that altering the structural nature of their N-glycans can impact several trophoblast functions, which include those related to interactions with decidual cells. This review summarizes trophoblast-related activities influenced by N-glycan-GBP recognition, exploring how different subtypes of trophoblasts actively adapt to characteristics of the decidualized endometrium through cell-specific expression of N-glycosylated proteins, and how these cells receive decidua-derived signals via N-glycan-GBP interactions. We highlight work on how changes in N-glycosylation relates to the success of trophoblast infiltration, interactions of immunomodulators, and uterine angiogenesis. We also discuss studies that suggest aberrant N-glycosylation of trophoblasts may contribute to the pathogenesis of pregnancy complications (e.g. pre-eclampsia, early spontaneous miscarriages and hydatidiform mole). We propose that a more in-depth understanding of how N-glycosylation shapes trophoblast phenotype during early pregnancy has the potential to improve our approach to predicting, diagnosing and alleviating poor maternal/fetal outcomes associated with placental dysfunction.
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Shi J, Zeng S, Zhang Y, Zuo Z, Tan X. Fibrinogen beta chain may be a potential predict biomarker for pre-eclampsia: A preliminary study. Clin Chim Acta 2023; 539:206-214. [PMID: 36566955 DOI: 10.1016/j.cca.2022.12.012] [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: 10/11/2022] [Revised: 11/08/2022] [Accepted: 12/13/2022] [Indexed: 12/24/2022]
Abstract
OBJECTIVE There are no approaches for the early detection of pre-eclampsia (PE). Using parallel reaction monitoring proteomics, we investigated 79 maternal serum protein changes before PE onset and its predictive capability. METHODS We conducted a nested case-control study with 60 PE patients and 60 normotensive pregnant women matched for age and gestational week. These differentially expressed proteins were quantified using the data-dependent acquisition (DDA) combined parallel response monitoring (PRM) approach, and a PE prediction model was developed using the least absolute shrinkage and selection operator (LASSO) regression. We further examined the link between these biomarkers and PE using bioinformatics. ELISA assay was used to investigate the expression and clinical significance of the critical variables. RESULTS Among the 79 analyzed proteins, we identified 11 serum proteins with significantly abnormal expression. Fibrinogen beta chain (FGB) was likely connected with the progression of PE due to the positive correlation between their levels and those of hypertension and proteinuria. In addition, an early prediction model for PE with an AUC of 92% was developed using LASSO regression. CONCLUSION Our research employs predictive algorithms and screens for relevant variables, which could result in a potential approach to enhancing PE prediction.
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Affiliation(s)
- Junzhu Shi
- Department of Clinical Laboratory, Shenzhen Longhua District Central Hospital, Shenzhen 518110, China
| | - Shanshui Zeng
- Department of Clinical Laboratory, Guangzhou Women and Children's Medical Center, Guangzhou 510623, China
| | - Yonggang Zhang
- Department of Clinical Laboratory, Shenzhen Longhua District Central Hospital, Shenzhen 518110, China
| | - Zhihua Zuo
- Department of Clinical Laboratory, Nanchong Central Hospital, The Second Clinical Medical College, North Sichuan Medical College, China
| | - Xiaoyu Tan
- Department of Nursing, Shenzhen Longhua District Central Hospital, No. 187 Guanlan Avenue, Longhua District, Shenzhen, 518110, China.
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True H, Blanton M, Sureshchandra S, Messaoudi I. Monocytes and macrophages in pregnancy: The good, the bad, and the ugly. Immunol Rev 2022; 308:77-92. [PMID: 35451089 DOI: 10.1111/imr.13080] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Accepted: 04/08/2022] [Indexed: 12/12/2022]
Abstract
A successful human pregnancy requires precisely timed adaptations by the maternal immune system to support fetal growth while simultaneously protecting mother and fetus against microbial challenges. The first trimester of pregnancy is characterized by a robust increase in innate immune activity that promotes successful implantation of the blastocyst and placental development. Moreover, early pregnancy is also a state of increased vulnerability to vertically transmitted pathogens notably, human immunodeficiency virus (HIV), Zika virus (ZIKV), SARS-CoV-2, and Listeria monocytogenes. As gestation progresses, the second trimester is marked by the establishment of an immunosuppressive environment that promotes fetal tolerance and growth while preventing preterm birth, spontaneous abortion, and other gestational complications. Finally, the period leading up to labor and parturition is characterized by the reinstatement of an inflammatory milieu triggering childbirth. These dynamic waves of carefully orchestrated changes have been dubbed the "immune clock of pregnancy." Monocytes in maternal circulation and tissue-resident macrophages at the maternal-fetal interface play a critical role in this delicate balance. This review will summarize the current data describing the longitudinal changes in the phenotype and function of monocyte and macrophage populations in healthy and complicated pregnancies.
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Affiliation(s)
- Heather True
- Department of Microbiology, Immunology, and Molecular Genetics, University of Kentucky College of Medicine, Lexington, Kentucky, USA.,Department of Pharmaceutical Sciences, University of Kentucky College of Pharmacy, Lexington, Kentucky, USA
| | - Madison Blanton
- Department of Microbiology, Immunology, and Molecular Genetics, University of Kentucky College of Medicine, Lexington, Kentucky, USA.,Department of Pharmaceutical Sciences, University of Kentucky College of Pharmacy, Lexington, Kentucky, USA
| | | | - Ilhem Messaoudi
- Department of Microbiology, Immunology, and Molecular Genetics, University of Kentucky College of Medicine, Lexington, Kentucky, USA
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Kandel M, MacDonald TM, Walker SP, Cluver C, Bergman L, Myers J, Hastie R, Keenan E, Hannan NJ, Cannon P, Nguyen TV, Pritchard N, Tong S, Kaitu'u-Lino TJ. PSG7 and 9 (Pregnancy-Specific β-1 Glycoproteins 7 and 9): Novel Biomarkers for Preeclampsia. J Am Heart Assoc 2022; 11:e024536. [PMID: 35322669 PMCID: PMC9075453 DOI: 10.1161/jaha.121.024536] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background Preeclampsia is pregnancy specific, involving significant maternal endothelial dysfunction. Predictive biomarkers are lacking. We evaluated the biomarker potential, expression, and function of PSG7 (pregnancy‐specific β‐1 glycoprotein 7) and PSG9 (pregnancy‐specific β‐1 glycoprotein 9) in preeclampsia. Methods and Results At 36 weeks gestation preceding term preeclampsia diagnosis, PSG7 and PSG9 (in Australian cohorts of n=918 and n=979, respectively) were significantly increased before the onset of term preeclampsia (PSG7, P=0.013; PSG9, P=0.0011). In samples collected at 28 to 32 weeks from those with preexisting cardiovascular disease and at high risk of preeclampsia (Manchester Antenatal Vascular Service, UK cohort, n=235), both PSG7 and PSG9 were also significantly increased preceding preeclampsia onset (PSG7, P<0.0001; PSG9, P=0.0003) relative to controls. These changes were validated in the plasma and placentas of patients with established preeclampsia who delivered at <34 weeks gestation (PSG7, P=0.0008; PSG9, P<0.0001). To examine whether PSG7 and PSG9 are associated with increasing disease severity, we measured them in a cohort from South Africa stratified for this outcome, the PROVE (Preeclampsia Obstetric Adverse Events) cohort (n=72). PSG7 (P=0.0027) and PSG9 (P=0.0028) were elevated among patients who were preeclamptic with severe features (PROVE cohort), but not significantly changed in those without severe features or with eclampsia. In syncytialized first trimester cytotrophoblast stem cells, exposure to TNFα (tumor necrosis factor α) or IL‐6 (interleukin 6) significantly increased the expression and secretion of PSG7 and PSG9. In contrast, when we treated primary endothelial cells with recombinant PSG7 and PSG9, we only observed modest changes in Flt‐1 (FMS‐like tyrosine kinase‐1) expression and Plgf (placental growth factor) expression, and no other effects on proangiogenic/antiangiogenic or endothelial dysfunction markers were observed. Conclusions Circulating PSG7 and PSG9 are increased before preeclampsia onset and among those with established disease with their production and release potentially driven by placental inflammation.
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Affiliation(s)
- Manju Kandel
- Translational Obstetrics Group Mercy Hospital for Women Heidelberg Victoria Australia.,Department of Obstetrics and Gynaecology Mercy Hospital for Women University of Melbourne Heidelberg Victoria Australia
| | - Teresa M MacDonald
- Department of Obstetrics and Gynaecology Mercy Hospital for Women University of Melbourne Heidelberg Victoria Australia.,Mercy PerinatalMercy Hospital for Women Victoria Australia
| | - Susan P Walker
- Department of Obstetrics and Gynaecology Mercy Hospital for Women University of Melbourne Heidelberg Victoria Australia.,Mercy PerinatalMercy Hospital for Women Victoria Australia
| | - Catherine Cluver
- Translational Obstetrics Group Mercy Hospital for Women Heidelberg Victoria Australia.,Mercy PerinatalMercy Hospital for Women Victoria Australia.,Department of Obstetrics and Gynecology Stellenbosch University Cape Town South Africa
| | - Lina Bergman
- Department of Obstetrics and Gynecology Stellenbosch University Cape Town South Africa.,Department of Women's and Children's Health Uppsala University Uppsala Sweden.,Department of Obstetrics and Gynecology Institute of clinical sciencesSahlgrenska AcademyUniversity of Gothenburg Gothenburg Sweden
| | - Jenny Myers
- Division of Developmental Biology and Medicine University of ManchesterManchester Academic Health Science CentreSt Mary's Hospital Manchester United Kingdom
| | - Roxanne Hastie
- Translational Obstetrics Group Mercy Hospital for Women Heidelberg Victoria Australia.,Department of Obstetrics and Gynaecology Mercy Hospital for Women University of Melbourne Heidelberg Victoria Australia
| | - Emerson Keenan
- Department of Obstetrics and Gynaecology Mercy Hospital for Women University of Melbourne Heidelberg Victoria Australia
| | - Natalie J Hannan
- Translational Obstetrics Group Mercy Hospital for Women Heidelberg Victoria Australia.,Department of Obstetrics and Gynaecology Mercy Hospital for Women University of Melbourne Heidelberg Victoria Australia.,Mercy PerinatalMercy Hospital for Women Victoria Australia
| | - Ping Cannon
- Translational Obstetrics Group Mercy Hospital for Women Heidelberg Victoria Australia.,Department of Obstetrics and Gynaecology Mercy Hospital for Women University of Melbourne Heidelberg Victoria Australia
| | - Tuong-Vi Nguyen
- Translational Obstetrics Group Mercy Hospital for Women Heidelberg Victoria Australia.,Department of Obstetrics and Gynaecology Mercy Hospital for Women University of Melbourne Heidelberg Victoria Australia
| | - Natasha Pritchard
- Translational Obstetrics Group Mercy Hospital for Women Heidelberg Victoria Australia.,Department of Obstetrics and Gynaecology Mercy Hospital for Women University of Melbourne Heidelberg Victoria Australia.,Mercy PerinatalMercy Hospital for Women Victoria Australia
| | - Stephen Tong
- Translational Obstetrics Group Mercy Hospital for Women Heidelberg Victoria Australia.,Department of Obstetrics and Gynaecology Mercy Hospital for Women University of Melbourne Heidelberg Victoria Australia.,Mercy PerinatalMercy Hospital for Women Victoria Australia
| | - Tu'uhevaha J Kaitu'u-Lino
- Translational Obstetrics Group Mercy Hospital for Women Heidelberg Victoria Australia.,Department of Obstetrics and Gynaecology Mercy Hospital for Women University of Melbourne Heidelberg Victoria Australia.,Mercy PerinatalMercy Hospital for Women Victoria Australia
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11
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Rattila S, Kleefeldt F, Ballesteros A, Beltrame JS, L Ribeiro M, Ergün S, Dveksler G. Pro-angiogenic effects of pregnancy-specific glycoproteins in endothelial and extravillous trophoblast cells. Reproduction 2021; 160:737-750. [PMID: 33065549 DOI: 10.1530/rep-20-0169] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 08/20/2020] [Indexed: 01/23/2023]
Abstract
We previously reported that binding to heparan sulfate (HS) is required for the ability of the placentally secreted pregnancy-specific glycoprotein 1 (PSG1) to induce endothelial tubulogenesis. PSG1 is composed of four immunoglobulin-like domains but which domains of the protein bind to HS remains unknown. To analyze the interaction of PSG1 with HS, we generated several recombinant proteins, including the individual domains, chimeric proteins between two PSG1 domains, and mutants. Using flow cytometric and surface plasmon resonance studies, we determined that the B2 domain of PSG1 binds to HS and that the positively charged amino acids encompassed between amino acids 43-59 are required for this interaction. Furthermore, we showed that the B2 domain of PSG1 is required for the increase in the formation of tubes by endothelial cells (EC) including a human endometrial EC line and two extravillous trophoblast (EVT) cell lines and for the pro-angiogenic activity of PSG1 observed in an aortic ring assay. PSG1 enhanced the migration of ECs while it increased the expression of matrix metalloproteinase-2 in EVTs, indicating that the pro-angiogenic effect of PSG1 on these two cell types may be mediated by different mechanisms. Despite differences in amino acid sequence, we observed that all human PSGs bound to HS proteoglycans and confirmed that at least two other members of the family, PSG6 and PSG9, induce tube formation. These findings contribute to a better understanding of the pro-angiogenic activity of human PSGs and strongly suggest conservation of this function among all PSG family members.
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Affiliation(s)
- Shemona Rattila
- Department of Pathology, Uniformed Services University of Health Sciences, Bethesda, Maryland, USA
| | - Florian Kleefeldt
- Institute of Anatomy and Cell Biology, Julius-Maximilians-University Würzburg, Würzburg, Germany
| | - Angela Ballesteros
- Molecular Physiology and Biophysics Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, USA
| | - Jimena S Beltrame
- Laboratory of Physiology and Pharmacology of Reproduction, Centre for Pharmacological and Botanical Studies (CONICET - School of Medicine, University of Buenos Aires), Buenos Aires, Argentina
| | - Maria L Ribeiro
- Laboratory of Physiology and Pharmacology of Reproduction, Centre for Pharmacological and Botanical Studies (CONICET - School of Medicine, University of Buenos Aires), Buenos Aires, Argentina
| | - Süleyman Ergün
- Institute of Anatomy and Cell Biology, Julius-Maximilians-University Würzburg, Würzburg, Germany
| | - Gabriela Dveksler
- Department of Pathology, Uniformed Services University of Health Sciences, Bethesda, Maryland, USA
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12
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Liu Y, Zhang S, Yu T, Zhang F, Yang F, Huang Y, Ma D, Liu G, Shao Z, Li D. Pregnancy-specific glycoprotein 9 acts as both a transcriptional target and a regulator of the canonical TGF-β/Smad signaling to drive breast cancer progression. Clin Transl Med 2020; 10:e245. [PMID: 33377651 PMCID: PMC7733318 DOI: 10.1002/ctm2.245] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 11/16/2020] [Accepted: 11/27/2020] [Indexed: 12/24/2022] Open
Abstract
Pregnancy-specific glycoprotein 9 (PSG9) is a placental glycoprotein essential for the maintenance of normal gestation in mammals. Bioinformatics analysis of multiple publicly available datasets revealed aberrant PSG9 expression in breast tumors, but its functional and mechanistic role in breast cancer remains unexplored. Here, we report that PSG9 expression levels were elevated in tumor tissues and plasma specimens from breast cancer patients, and were associated with poor prognosis. Gain- or loss-of-function studies demonstrated that PSG9 promoted breast cancer cell proliferation, migration, and invasionin vitro, and enhanced tumor growth and lung colonization in vivo. Mechanistically, transforming growth factor-β1 (TGF-β1) transcriptionally activated PSG9 expression through enhancing the enrichment of Smad3 and Smad4 onto PSG9 promoter regions containing two putative Smad-binding elements (SBEs). Mutation of both SBEs in the PSG9 promoter, or knockdown of TGF-β receptor 1 (TGFBR1), TGFBR2, Smad3, or Smad4 impaired the ability of TGF-β1 to induce PSG9 expression. Consequently, PSG9 contributed to TGF-β1-induced epithelial-mesenchymal transition (EMT) and breast cancer cell migration and invasion. Moreover, PSG9 enhanced the stability of Smad2, Smad3, and Smad4 proteins by blocking their proteasomal degradation, and regulated the expression of TGF-β1 target genes involved in EMT and breast cancer progression, thus further amplifying the canonical TGF-β/Smad signaling in breast cancer cells. Collectively, these findings establish PSG9 as a novel player in breast cancer progressionvia hijacking the canonical TGF-β/Smad signaling, and identify PSG9 as a potential plasma biomarker for the early detection of breast cancer.
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Affiliation(s)
- Ying‐Ying Liu
- Fudan University Shanghai Cancer Center and Shanghai Key Laboratory of Medical EpigeneticsInternational Co‐laboratory of Medical Epigenetics and MetabolismMinistry of Science and TechnologyInstitutes of Biomedical SciencesFudan UniversityShanghaiChina
- Cancer InstituteShanghai Medical College, Fudan UniversityShanghaiChina
- Department of OncologyShanghai Medical College, Fudan UniversityShanghaiChina
- Department of Breast SurgeryShanghai Medical College, Fudan UniversityShanghaiChina
| | - Sa Zhang
- Fudan University Shanghai Cancer Center and Shanghai Key Laboratory of Medical EpigeneticsInternational Co‐laboratory of Medical Epigenetics and MetabolismMinistry of Science and TechnologyInstitutes of Biomedical SciencesFudan UniversityShanghaiChina
| | - Tian‐Jian Yu
- Fudan University Shanghai Cancer Center and Shanghai Key Laboratory of Medical EpigeneticsInternational Co‐laboratory of Medical Epigenetics and MetabolismMinistry of Science and TechnologyInstitutes of Biomedical SciencesFudan UniversityShanghaiChina
- Cancer InstituteShanghai Medical College, Fudan UniversityShanghaiChina
- Department of OncologyShanghai Medical College, Fudan UniversityShanghaiChina
- Department of Breast SurgeryShanghai Medical College, Fudan UniversityShanghaiChina
| | - Fang‐Lin Zhang
- Fudan University Shanghai Cancer Center and Shanghai Key Laboratory of Medical EpigeneticsInternational Co‐laboratory of Medical Epigenetics and MetabolismMinistry of Science and TechnologyInstitutes of Biomedical SciencesFudan UniversityShanghaiChina
- Cancer InstituteShanghai Medical College, Fudan UniversityShanghaiChina
- Department of OncologyShanghai Medical College, Fudan UniversityShanghaiChina
| | - Fan Yang
- Fudan University Shanghai Cancer Center and Shanghai Key Laboratory of Medical EpigeneticsInternational Co‐laboratory of Medical Epigenetics and MetabolismMinistry of Science and TechnologyInstitutes of Biomedical SciencesFudan UniversityShanghaiChina
- Cancer InstituteShanghai Medical College, Fudan UniversityShanghaiChina
- Department of OncologyShanghai Medical College, Fudan UniversityShanghaiChina
- Department of Breast SurgeryShanghai Medical College, Fudan UniversityShanghaiChina
| | - Yan‐Ni Huang
- Department of Breast SurgeryShanghai Medical College, Fudan UniversityShanghaiChina
| | - Ding Ma
- Department of Breast SurgeryShanghai Medical College, Fudan UniversityShanghaiChina
| | - Guang‐Yu Liu
- Department of OncologyShanghai Medical College, Fudan UniversityShanghaiChina
- Department of Breast SurgeryShanghai Medical College, Fudan UniversityShanghaiChina
| | - Zhi‐Ming Shao
- Fudan University Shanghai Cancer Center and Shanghai Key Laboratory of Medical EpigeneticsInternational Co‐laboratory of Medical Epigenetics and MetabolismMinistry of Science and TechnologyInstitutes of Biomedical SciencesFudan UniversityShanghaiChina
- Cancer InstituteShanghai Medical College, Fudan UniversityShanghaiChina
- Department of OncologyShanghai Medical College, Fudan UniversityShanghaiChina
- Department of Breast SurgeryShanghai Medical College, Fudan UniversityShanghaiChina
- Shanghai Key Laboratory of Breast CancerShanghai Medical College, Fudan UniversityShanghaiChina
| | - Da‐Qiang Li
- Fudan University Shanghai Cancer Center and Shanghai Key Laboratory of Medical EpigeneticsInternational Co‐laboratory of Medical Epigenetics and MetabolismMinistry of Science and TechnologyInstitutes of Biomedical SciencesFudan UniversityShanghaiChina
- Cancer InstituteShanghai Medical College, Fudan UniversityShanghaiChina
- Department of OncologyShanghai Medical College, Fudan UniversityShanghaiChina
- Department of Breast SurgeryShanghai Medical College, Fudan UniversityShanghaiChina
- Shanghai Key Laboratory of Breast CancerShanghai Medical College, Fudan UniversityShanghaiChina
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13
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Expression of Pregnancy Specific β-1 Glycoprotein 1 in Cervical Cancer Cells. Arch Med Res 2020; 51:504-514. [PMID: 32546445 DOI: 10.1016/j.arcmed.2020.05.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 04/25/2020] [Accepted: 05/07/2020] [Indexed: 11/24/2022]
Abstract
BACKGROUND Cervical Cancer (CC) is a worldwide public health concern associated with genetic alterations, among these the gain of the 19q chromosome harboring the Pregnancy Specific Glycoproteins (PSG) gene family. These proteins play a critical role in pregnancy, with participation in immunotolerance, angiogenesis, and invasion processes, which are also observed in carcinogenesis. The aim of this study was to determine the molecular alterations of PSG1 and its relationship with CC. METHODS PSG1 Copy Number Variation (CNV) was evaluated in 31 CC and eight normal cervical tissues by qPCR. PSG1 expression was correlated with HPV detection and IL-10 and TGF-β expression in CC samples. Finally, PSG1 protein expression was evaluated by immunofluorescence in CC cell lines, by immunohistochemistry in a tissue microarray, and by immunoblotting in the sera of women with normal cervix, pre-invasive lesions, and CC. RESULTS PSG1 showed a gain of 25.6% in CNV and gene expression in CC. There was a lack of PSG1 expression in normal cervical epithelium and positive immunostaining in 57% of CC tissues, while all CC cell lines expressed PSG1. Finally, PSG1 was immunodetected in 90% of pre-invasive lesions and in all CC serum samples, but not in healthy women. PSG1 expression correlates with the expression of IL-10 and TGF-β in CC tissues, but not with the presence of HPV. CONCLUSION These data show evidence of the differential expression of PSG1 in CC that could explain its participation in tumor-biology and immunotolerance mechanisms. Further, its immunodetection could provide early detection of this cancer.
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14
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Human PZP and common marmoset A2ML1 as pregnancy related proteins. Sci Rep 2020; 10:5088. [PMID: 32198464 PMCID: PMC7083932 DOI: 10.1038/s41598-020-61714-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Accepted: 01/24/2020] [Indexed: 11/18/2022] Open
Abstract
While pregnancy-related proteins (PRP) are known to contribute to immunotolerance during pregnancy, their significance to development of invasive placenta is unclear. We compared PRP expression in humans and the common marmoset (Callithrix jacchus), a new-world monkey. Invasive placenta was observed at the maternal-foetal interface of marmoset placenta from green fluorescent protein (GFP)-expressing foetus and wild type mother. The pregnancy zone protein (PZP) and alpha-2 macroglobulin-like 1 (A2ML1) proteins exhibited the most prominent increase in expression during the second trimester in humans and marmoset, respectively. In humans, PZP accumulated at the maternal-foetal interface and A2ML1 accumulated in the amnion. Similarly, A2ML1 mRNA was detected in marmoset placenta. These proteins belong to the A2M family of protease inhibitors, and both PZP and A2ML1 share around 90% homology between human and marmoset and have highly conserved structures. However, the protease-reacting bait regions of the proteins had lower homology (56.8–60.7% in proteins) relative to the rest of the sequence. Notably, the cleavage site of a proinflammatory proline-endopeptidase was preserved in human PZP and marmoset A2ML1. These proteins contain multiple sites that are cleaved by proteases involving proline-endopeptidase. Systemic regulation of these A2M family proteins may be important in animals with invasive placenta.
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15
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Yao Y, Xu XH, Jin L. Macrophage Polarization in Physiological and Pathological Pregnancy. Front Immunol 2019; 10:792. [PMID: 31037072 PMCID: PMC6476302 DOI: 10.3389/fimmu.2019.00792] [Citation(s) in RCA: 381] [Impact Index Per Article: 76.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 03/26/2019] [Indexed: 12/12/2022] Open
Abstract
The immunology of pregnancy is complex and poorly defined. During the complex process of pregnancy, macrophages secrete many cytokines/chemokines and play pivotal roles in the maintenance of maternal-fetal tolerance. Here, we summarized the current knowledge of macrophage polarization and the mechanisms involved in physiological or pathological pregnancy processes, including miscarriage, preeclampsia, and preterm birth. Although current evidence provides a compelling argument that macrophages are important in pregnancy, our understanding of the roles and mechanisms of macrophages in pregnancy is still rudimentary. Since macrophages exhibit functional plasticity, they may be ideal targets for therapeutic manipulation during pathological pregnancy. Additional studies are needed to better define the functions and mechanisms of various macrophage subsets in both normal and pathological pregnancy.
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Affiliation(s)
- Yongli Yao
- Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xiang-Hong Xu
- Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
| | - Liping Jin
- Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
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16
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Jones K, Bryant S, Luo J, Kiesler P, Koontz S, Warren J, Malech H, Kang E, Dveksler G. Recombinant Pregnancy-Specific Glycoprotein 1 Has a Protective Role in a Murine Model of Acute Graft-versus-Host Disease. Biol Blood Marrow Transplant 2018; 25:193-203. [PMID: 30253241 DOI: 10.1016/j.bbmt.2018.09.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 09/13/2018] [Indexed: 12/23/2022]
Abstract
Acute graft-versus-host disease (aGVHD) is an immune-mediated reaction that can occur after hematopoietic stem cell transplantation in which donor T cells recognize the host antigens as foreign, destroying host tissues. Establishment of a tolerogenic immune environment while preserving the immune response to infectious agents is required for successful bone marrow transplantation. Pregnancy-specific glycoprotein 1 (PSG1), which is secreted by the human placenta into the maternal circulation throughout pregnancy, likely plays a role in maintaining immunotolerance to prevent rejection of the fetus by the maternal immune system. We have previously shown that PSG1 activates the latent form of transforming growth factor β1 (TGF-β), a cytokine essential for the differentiation of tolerance-inducing CD4+FoxP3+ regulatory T cells (Tregs). Consistent with this observation, treatment of naïve murine T cells with PSG1 resulted in a significant increase in FoxP3+ cells that was blocked by a TGF-β receptor I inhibitor. We also show here that PSG1 can increase the availability of active TGF-β in vivo. As the role of CD4+FoxP3+ cells in the prevention of aGVHD is well established, we tested whether PSG1 has beneficial effects in a murine aGHVD transplantation model. PSG1-treated mice had reduced numbers of tissue-infiltrating inflammatory CD3+ T cells and had increased expression of FoxP3 in T cells compared with vehicle-treated mice. In addition, administration of PSG1 significantly inhibited aGVHD-associated weight loss and mortality. On the other hand, administration of PSG1 was less effective in managing aGVHD in the presence of an alloimmune reaction against a malignancy in a graft-versus-leukemia experimental model. Combined, this data strongly suggests that PSG1 could be a promising treatment option for patients with aGVHD following bone marrow transplantation for a nonmalignant condition, such as an autoimmune disorder or a genetic immunodeficiency.
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Affiliation(s)
- Karlie Jones
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland
| | - Sarah Bryant
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland
| | - Jian Luo
- Palo Alto Veterans Institute for Research, VA Palo Alto Health Care System, Palo Alto, California
| | - Patricia Kiesler
- Mucosal Immunity Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland
| | - Sherry Koontz
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland
| | - James Warren
- Department of Pathology, Uniformed Services University of the Health Sciences, Bethesda, Maryland
| | - Harry Malech
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland
| | - Elizabeth Kang
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland
| | - Gabriela Dveksler
- Department of Pathology, Uniformed Services University of the Health Sciences, Bethesda, Maryland.
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17
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Majewska M, Lipka A, Paukszto L, Jastrzebski JP, Gowkielewicz M, Jozwik M, Majewski MK. Preliminary RNA-Seq Analysis of Long Non-Coding RNAs Expressed in Human Term Placenta. Int J Mol Sci 2018; 19:ijms19071894. [PMID: 29954144 PMCID: PMC6073670 DOI: 10.3390/ijms19071894] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 06/24/2018] [Indexed: 12/20/2022] Open
Abstract
Development of particular structures and proper functioning of the placenta are under the influence of sophisticated pathways, controlled by the expression of substantial genes that are additionally regulated by long non-coding RNAs (lncRNAs). To date, the expression profile of lncRNA in human term placenta has not been fully established. This study was conducted to characterize the lncRNA expression profile in human term placenta and to verify whether there are differences in the transcriptomic profile between the sex of the fetus and pregnancy multiplicity. RNA-Seq data were used to profile, quantify, and classify lncRNAs in human term placenta. The applied methodology enabled detection of the expression of 4463 isoforms from 2899 annotated lncRNA loci, plus 990 putative lncRNA transcripts from 607 intergenic regions. Those placentally expressed lncRNAs displayed features such as shorter transcript length, longer exon length, fewer exons, and lower expression levels compared to messenger RNAs (mRNAs). Among all placental transcripts, 175,268 were classified as mRNAs and 15,819 as lncRNAs, and 56,727 variants were discovered within unannotated regions. Five differentially expressed lncRNAs (HAND2-AS1, XIST, RP1-97J1.2, AC010084.1, TTTY15) were identified by a sex-bias comparison. Splicing events were detected within 37 genes and 4 lncRNA loci. Functional analysis of cis-related potential targets for lncRNAs identified 2021 enriched genes. It is presumed that the obtained data will expand the current knowledge of lncRNAs in placenta and human non-coding catalogs, making them more contemporary and specific.
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Affiliation(s)
- Marta Majewska
- Department of Human Physiology, School of Medicine, Collegium Medicum, University of Warmia and Mazury in Olsztyn, 10-082 Olsztyn, Poland.
| | - Aleksandra Lipka
- Department of Gynecology and Obstetrics, School of Medicine, Collegium Medicum, University of Warmia and Mazury in Olsztyn, 10-045 Olsztyn, Poland.
| | - Lukasz Paukszto
- Department of Plant Physiology, Genetics and Biotechnology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland.
| | - Jan Pawel Jastrzebski
- Department of Plant Physiology, Genetics and Biotechnology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland.
| | - Marek Gowkielewicz
- Department of Gynecology and Obstetrics, School of Medicine, Collegium Medicum, University of Warmia and Mazury in Olsztyn, 10-045 Olsztyn, Poland.
| | - Marcin Jozwik
- Department of Gynecology and Obstetrics, School of Medicine, Collegium Medicum, University of Warmia and Mazury in Olsztyn, 10-045 Olsztyn, Poland.
| | - Mariusz Krzysztof Majewski
- Department of Human Physiology, School of Medicine, Collegium Medicum, University of Warmia and Mazury in Olsztyn, 10-082 Olsztyn, Poland.
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18
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Park JY, Kim M, Park TJ, Kang HY. TGFβ1 derived from endothelial cells inhibits melanogenesis. Pigment Cell Melanoma Res 2016; 29:477-80. [DOI: 10.1111/pcmr.12491] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ji-Youn Park
- Department of Dermatology; Ajou University School of Medicine; Suwon Korea
| | - Misun Kim
- Department of Dermatology; Ajou University School of Medicine; Suwon Korea
- Chronic Inflammatory Disease Research Center; Ajou University School of Medicine; Suwon Korea
- Department of Biomedical Science; The Graduate School; Ajou University; Suwon Korea
| | - Tae Jun Park
- Chronic Inflammatory Disease Research Center; Ajou University School of Medicine; Suwon Korea
- Department of Biomedical Science; The Graduate School; Ajou University; Suwon Korea
- Department of Biochemistry and Molecular Biology; Ajou University School of Medicine; Suwon Korea
| | - Hee Young Kang
- Department of Dermatology; Ajou University School of Medicine; Suwon Korea
- Chronic Inflammatory Disease Research Center; Ajou University School of Medicine; Suwon Korea
- Department of Biomedical Science; The Graduate School; Ajou University; Suwon Korea
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19
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Houston A, Williams JM, Rovis TL, Shanley DK, O'Riordan RT, Kiely PA, Ball M, Barry OP, Kelly J, Fanning A, MacSharry J, Mandelboim O, Singer BB, Jonjic S, Moore T. Pregnancy-specific glycoprotein expression in normal gastrointestinal tract and in tumors detected with novel monoclonal antibodies. MAbs 2016; 8:491-500. [PMID: 26926266 DOI: 10.1080/19420862.2015.1134410] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
Pregnancy-specific glycoproteins (PSGs) are immunoglobulin superfamily members related to the carcinoembryonic antigen-related cell adhesion molecule (CEACAM) family and are encoded by 10 genes in the human. They are secreted at high levels by placental syncytiotrophoblast into maternal blood during pregnancy, and are implicated in immunoregulation, thromboregulation, and angiogenesis. To determine whether PSGs are expressed in tumors, we characterized 16 novel monoclonal antibodies to human PSG1 and used 2 that do not cross-react with CEACAMs to study PSG expression in tumors and in the gastrointestinal (GI) tract using tissue arrays and immunohistochemistry. Staining was frequently observed in primary squamous cell carcinomas and colonic adenocarcinomas and was correlated with the degree of tumor differentiation, being largely absent from metastatic samples. Staining was also observed in normal oesophageal and colonic epithelium. PSG expression in the human and mouse GI tract was confirmed using quantitative RT-PCR. However, mRNA expression was several orders of magnitude lower in the GI tract compared to placenta. Our results identify a non-placental site of PSG expression in the gut and associated tumors, with implications for determining whether PSGs have a role in tumor progression, and utility as tumor biomarkers.
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Affiliation(s)
- Aileen Houston
- a School of Medicine , University College Cork , Ireland
| | - John M Williams
- b School of Biochemistry and Cell Biology, University College Cork , Ireland
| | - Tihana Lenac Rovis
- c Department of Histology and Embryology/Center for Proteomics , Faculty of Medicine, University of Rijeka , Croatia
| | - Daniel K Shanley
- b School of Biochemistry and Cell Biology, University College Cork , Ireland
| | - Ronan T O'Riordan
- b School of Biochemistry and Cell Biology, University College Cork , Ireland
| | - Patrick A Kiely
- d Department of Life Sciences , Materials and Surface Science Institute and Stokes Institute, University of Limerick
| | - Melanie Ball
- b School of Biochemistry and Cell Biology, University College Cork , Ireland
| | - Orla P Barry
- e Department of Pharmacology , Alimentary Pharmabiotic Center, University College Cork , Ireland
| | - Jacquie Kelly
- a School of Medicine , University College Cork , Ireland
| | - Aine Fanning
- f Alimentary Pharmabiotic Center, University College Cork , Ireland
| | - John MacSharry
- f Alimentary Pharmabiotic Center, University College Cork , Ireland
| | - Ofer Mandelboim
- g Lautenberg Center for General and Tumor Immunology, Institute for Medical Research Israel-Canada, Hebrew University-Hadassah Medical School , Jerusalem , Israel
| | - Bernhard B Singer
- h Institute of Anatomy, University Hospital, University Duisburg-Essen , Essen , Germany
| | - Stipan Jonjic
- c Department of Histology and Embryology/Center for Proteomics , Faculty of Medicine, University of Rijeka , Croatia
| | - Tom Moore
- b School of Biochemistry and Cell Biology, University College Cork , Ireland
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20
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Mao X, Kadri N, Thomasen J, De Koning D, Sahana G, Guldbrandtsen B. Fine mapping of a calving QTL on Bos taurus
autosome 18 in Holstein cattle. J Anim Breed Genet 2015; 133:207-18. [DOI: 10.1111/jbg.12187] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 09/01/2015] [Indexed: 02/02/2023]
Affiliation(s)
- X. Mao
- Department of Molecular Biology and Genetics; Center for Quantitative Genetics and Genomics; Aarhus University; Tjele Denmark
- Department of Animal Breeding and Genetics; Swedish University of Agricultural Sciences; Uppsala Sweden
| | - N.K. Kadri
- Department of Molecular Biology and Genetics; Center for Quantitative Genetics and Genomics; Aarhus University; Tjele Denmark
| | - J.R. Thomasen
- Department of Molecular Biology and Genetics; Center for Quantitative Genetics and Genomics; Aarhus University; Tjele Denmark
- VikingGenetics; Assentoft Denmark
| | - D.J. De Koning
- Department of Animal Breeding and Genetics; Swedish University of Agricultural Sciences; Uppsala Sweden
| | - G. Sahana
- Department of Molecular Biology and Genetics; Center for Quantitative Genetics and Genomics; Aarhus University; Tjele Denmark
| | - B. Guldbrandtsen
- Department of Molecular Biology and Genetics; Center for Quantitative Genetics and Genomics; Aarhus University; Tjele Denmark
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21
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Williams JM, Ball M, Ward A, Moore T. Psg22 expression in mouse trophoblast giant cells is associated with gene inversion and co-expression of antisense long non-coding RNAs. Reproduction 2014; 149:125-37. [PMID: 25359516 DOI: 10.1530/rep-14-0390] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Pregnancy-specific glycoproteins (PSGs) are secreted carcinoembryonic antigen (CEA)-related cell adhesion molecules-related members of the immunoglobulin superfamily and are encoded by multigene families in species with haemochorial placentation. PSGs may be the most abundant trophoblast-derived proteins in human maternal blood in late pregnancy and there is evidence that dysregulation of PSG expression is associated with gestational pathology. PSGs are produced by syncytiotrophoblast in the human placenta and by trophoblast giant cells (TGCs) and spongiotrophoblast in rodents, and are implicated in immune regulation, angiogenesis and regulation of platelet function. PSGs are encoded by 17 genes in the mouse and ten genes in the human. While functions appear to be conserved, the typical protein domain organisation differs between species. We analysed the evolution of the mouse Psg genomic locus structure and report inversion of the Psg22 gene within the locus. Psg22 is the most abundant Psg transcript detected in the first half of mouse pregnancy and we identified antisense long non-coding RNA (lncRNA) transcripts adjacent to Psg22 associated with an active local chromatin conformation. This suggests that an epigenetic regulatory mechanism may underpin high Psg22 expression relative to the other Psg gene family members in TGCs.
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Affiliation(s)
- John M Williams
- School of Biochemistry and Cell BiologyUniversity College Cork, Western Gateway Building, Western Road, Cork, IrelandDepartment of Biology and BiochemistryUniversity of Bath, Claverton Down, Bath BA2 7AY, UK School of Biochemistry and Cell BiologyUniversity College Cork, Western Gateway Building, Western Road, Cork, IrelandDepartment of Biology and BiochemistryUniversity of Bath, Claverton Down, Bath BA2 7AY, UK
| | - Melanie Ball
- School of Biochemistry and Cell BiologyUniversity College Cork, Western Gateway Building, Western Road, Cork, IrelandDepartment of Biology and BiochemistryUniversity of Bath, Claverton Down, Bath BA2 7AY, UK
| | - Andrew Ward
- School of Biochemistry and Cell BiologyUniversity College Cork, Western Gateway Building, Western Road, Cork, IrelandDepartment of Biology and BiochemistryUniversity of Bath, Claverton Down, Bath BA2 7AY, UK
| | - Tom Moore
- School of Biochemistry and Cell BiologyUniversity College Cork, Western Gateway Building, Western Road, Cork, IrelandDepartment of Biology and BiochemistryUniversity of Bath, Claverton Down, Bath BA2 7AY, UK
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22
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Pavlopoulou A, Scorilas A. A comprehensive phylogenetic and structural analysis of the carcinoembryonic antigen (CEA) gene family. Genome Biol Evol 2014; 6:1314-26. [PMID: 24858421 PMCID: PMC4079198 DOI: 10.1093/gbe/evu103] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The carcinoembryonic antigen (CEA) gene family belongs to the immunoglobulin (Ig) superfamily and codes for a vast number of glycoproteins that differ greatly both in amino acid composition and function. The CEA family is divided into two groups, the carcinoembryonic antigen-related cell adhesion molecules (CEACAMs) and the pregnancy-specific glycoproteins. The CEA family members are implicated in pleiotropic (patho)physiological functions including cell-cell adhesion, pregnancy, immunity, neovascularization, regulation of insulin homeostasis, and carcinogenesis. In general, the CEA-encoded proteins are composed of an extracellular region with Ig variable and constant-like domains and a cytoplasmic region containing signaling motifs. Of particular interest, the well-studied human and mouse CEA genes are arranged in clusters in a single chromosome. Taking into account this characteristic, we made an effort to reconstruct the evolutionary history of the CEA gene family. Toward this end, the publicly available genomes were searched extensively for CEA homologs. The domain organization of the retrieved protein sequences was analyzed, and, subsequently, comprehensive phylogenetic analyses of the entire length CEA homologous proteins were performed. A series of evolutionarily conserved amino acid residues, functionally important, were identified. The relative positioning of these residues on the modeled tertiary structure of novel CEA protein domains revealed that they are, also, spatially conserved. Furthermore, the chromosomal arrangement of CEA genes was examined, and it was found that the CEA genes are preserved in terms of position, transcriptional orientation, and number in all species under investigation.
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Affiliation(s)
- Athanasia Pavlopoulou
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Athens, Panepistimiopolis, Athens, Greece
| | - Andreas Scorilas
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Athens, Panepistimiopolis, Athens, Greece
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23
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Blois SM, Sulkowski G, Tirado-González I, Warren J, Freitag N, Klapp BF, Rifkin D, Fuss I, Strober W, Dveksler GS. Pregnancy-specific glycoprotein 1 (PSG1) activates TGF-β and prevents dextran sodium sulfate (DSS)-induced colitis in mice. Mucosal Immunol 2014; 7:348-58. [PMID: 23945545 PMCID: PMC3844031 DOI: 10.1038/mi.2013.53] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Accepted: 06/25/2013] [Indexed: 02/04/2023]
Abstract
Transforming growth factor-βs (TGF-βs) are secreted from cells as latent complexes and the activity of TGF-βs is controlled predominantly through activation of these complexes. Tolerance to the fetal allograft is essential for pregnancy success; TGF-β1 and TGF-β2 play important roles in regulating these processes. Pregnancy-specific β-glycoproteins (PSGs) are present in the maternal circulation at a high concentration throughout pregnancy and have been proposed to have anti-inflammatory functions. We found that recombinant and native PSG1 activate TGF-β1 and TGF-β2 in vitro. Consistent with these findings, administration of PSG1 protected mice from dextran sodium sulfate (DSS)-induced colitis, reduced the secretion of pro-inflammatory cytokines, and increased the number of T regulatory cells. The PSG1-mediated protection was greatly inhibited by the coadministration of neutralizing anti-TGF-β antibody. Our results indicate that proteins secreted by the placenta directly contribute to the generation of active TGF-β and identify PSG1 as one of the few known biological activators of TGF-β2.
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Affiliation(s)
- Sandra M. Blois
- Charité Center 12 Internal Medicine and Dermatology, Reproductive Medicine Research Group, Medicine University Berlin, Berlin, Germany,Correspondence:
| | - Gisela Sulkowski
- Department of Pathology, Uniformed Services University of the Health Sciences, Bethesda, USA
| | - Irene Tirado-González
- Charité Center 12 Internal Medicine and Dermatology, Reproductive Medicine Research Group, Medicine University Berlin, Berlin, Germany
| | - James Warren
- Department of Pathology, Uniformed Services University of the Health Sciences, Bethesda, USA
| | - Nancy Freitag
- Charité Center 12 Internal Medicine and Dermatology, Reproductive Medicine Research Group, Medicine University Berlin, Berlin, Germany
| | - Burghard F. Klapp
- Charité Center 12 Internal Medicine and Dermatology, Reproductive Medicine Research Group, Medicine University Berlin, Berlin, Germany
| | - Daniel Rifkin
- Department of Cell Biology, New York University School of Medicine, New York, USA
| | - Ivan Fuss
- Mucosal Immunity Section, Laboratory of Clinical Investigation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, USA
| | - Warren Strober
- Mucosal Immunity Section, Laboratory of Clinical Investigation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, USA
| | - Gabriela S. Dveksler
- Department of Pathology, Uniformed Services University of the Health Sciences, Bethesda, USA,Correspondence:
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24
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Dumont BL, Eichler EE. Signals of historical interlocus gene conversion in human segmental duplications. PLoS One 2013; 8:e75949. [PMID: 24124524 PMCID: PMC3790853 DOI: 10.1371/journal.pone.0075949] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Accepted: 08/17/2013] [Indexed: 12/04/2022] Open
Abstract
Standard methods of DNA sequence analysis assume that sequences evolve independently, yet this assumption may not be appropriate for segmental duplications that exchange variants via interlocus gene conversion (IGC). Here, we use high quality multiple sequence alignments from well-annotated segmental duplications to systematically identify IGC signals in the human reference genome. Our analysis combines two complementary methods: (i) a paralog quartet method that uses DNA sequence simulations to identify a statistical excess of sites consistent with inter-paralog exchange, and (ii) the alignment-based method implemented in the GENECONV program. One-quarter (25.4%) of the paralog families in our analysis harbor clear IGC signals by the quartet approach. Using GENECONV, we identify 1477 gene conversion tracks that cumulatively span 1.54 Mb of the genome. Our analyses confirm the previously reported high rates of IGC in subtelomeric regions and Y-chromosome palindromes, and identify multiple novel IGC hotspots, including the pregnancy specific glycoproteins and the neuroblastoma breakpoint gene families. Although the duplication history of a paralog family is described by a single tree, we show that IGC has introduced incredible site-to-site variation in the evolutionary relationships among paralogs in the human genome. Our findings indicate that IGC has left significant footprints in patterns of sequence diversity across segmental duplications in the human genome, out-pacing the contributions of single base mutation by orders of magnitude. Collectively, the IGC signals we report comprise a catalog that will provide a critical reference for interpreting observed patterns of DNA sequence variation across duplicated genomic regions, including targets of recent adaptive evolution in humans.
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Affiliation(s)
- Beth L. Dumont
- Department of Genome Sciences, University of Washington, Seattle, Washington, United States of America
- * E-mail:
| | - Evan E. Eichler
- Department of Genome Sciences, University of Washington, Seattle, Washington, United States of America
- Howard Hughes Medical Institute, Seattle, Washington, United States of America
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25
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Zhou Y, Gormley MJ, Hunkapiller NM, Kapidzic M, Stolyarov Y, Feng V, Nishida M, Drake PM, Bianco K, Wang F, McMaster MT, Fisher SJ. Reversal of gene dysregulation in cultured cytotrophoblasts reveals possible causes of preeclampsia. J Clin Invest 2013; 123:2862-72. [PMID: 23934129 PMCID: PMC3999620 DOI: 10.1172/jci66966] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Accepted: 04/04/2013] [Indexed: 11/17/2022] Open
Abstract
During human pregnancy, a subset of placental cytotrophoblasts (CTBs) differentiates into cells that aggressively invade the uterus and its vasculature, anchoring the progeny and rerouting maternal blood to the placenta. In preeclampsia (PE), CTB invasion is limited, reducing placental perfusion and/or creating intermittent flow. This syndrome, affecting 4%-8% of pregnancies, entails maternal vascular alterations (e.g., high blood pressure, proteinuria, and edema) and, in some patients, fetal growth restriction. The only cure is removal of the faulty placenta, i.e., delivery. Previously, we showed that defective CTB differentiation contributes to the placental component of PE, but the causes were unknown. Here, we cultured CTBs isolated from PE and control placentas for 48 hours, enabling differentiation and invasion. In various severe forms of PE, transcriptomics revealed common aberrations in CTB gene expression immediately after isolation, including upregulation of SEMA3B, which resolved in culture. The addition of SEMA3B to normal CTBs inhibited invasion and recreated aspects of the PE phenotype. Additionally, SEMA3B downregulated VEGF signaling through the PI3K/AKT and GSK3 pathways, effects that were observed in PE CTBs. We propose that, in severe PE, the in vivo environment dysregulates CTB gene expression; the autocrine actions of the upregulated molecules (including SEMA3B) impair CTB differentiation, invasion and signaling; and patient-specific factors determine the signs.
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Affiliation(s)
- Yan Zhou
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell
Research, Center for Reproductive Sciences, Department
of Obstetrics, Gynecology and Reproductive Sciences, Division of
Maternal Fetal Medicine, and Department of Anatomy, UCSF, San Francisco,
California, USA
| | - Matthew J. Gormley
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell
Research, Center for Reproductive Sciences, Department
of Obstetrics, Gynecology and Reproductive Sciences, Division of
Maternal Fetal Medicine, and Department of Anatomy, UCSF, San Francisco,
California, USA
| | - Nathan M. Hunkapiller
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell
Research, Center for Reproductive Sciences, Department
of Obstetrics, Gynecology and Reproductive Sciences, Division of
Maternal Fetal Medicine, and Department of Anatomy, UCSF, San Francisco,
California, USA
| | - Mirhan Kapidzic
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell
Research, Center for Reproductive Sciences, Department
of Obstetrics, Gynecology and Reproductive Sciences, Division of
Maternal Fetal Medicine, and Department of Anatomy, UCSF, San Francisco,
California, USA
| | - Yana Stolyarov
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell
Research, Center for Reproductive Sciences, Department
of Obstetrics, Gynecology and Reproductive Sciences, Division of
Maternal Fetal Medicine, and Department of Anatomy, UCSF, San Francisco,
California, USA
| | - Victoria Feng
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell
Research, Center for Reproductive Sciences, Department
of Obstetrics, Gynecology and Reproductive Sciences, Division of
Maternal Fetal Medicine, and Department of Anatomy, UCSF, San Francisco,
California, USA
| | - Masakazu Nishida
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell
Research, Center for Reproductive Sciences, Department
of Obstetrics, Gynecology and Reproductive Sciences, Division of
Maternal Fetal Medicine, and Department of Anatomy, UCSF, San Francisco,
California, USA
| | - Penelope M. Drake
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell
Research, Center for Reproductive Sciences, Department
of Obstetrics, Gynecology and Reproductive Sciences, Division of
Maternal Fetal Medicine, and Department of Anatomy, UCSF, San Francisco,
California, USA
| | - Katherine Bianco
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell
Research, Center for Reproductive Sciences, Department
of Obstetrics, Gynecology and Reproductive Sciences, Division of
Maternal Fetal Medicine, and Department of Anatomy, UCSF, San Francisco,
California, USA
| | - Fei Wang
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell
Research, Center for Reproductive Sciences, Department
of Obstetrics, Gynecology and Reproductive Sciences, Division of
Maternal Fetal Medicine, and Department of Anatomy, UCSF, San Francisco,
California, USA
| | - Michael T. McMaster
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell
Research, Center for Reproductive Sciences, Department
of Obstetrics, Gynecology and Reproductive Sciences, Division of
Maternal Fetal Medicine, and Department of Anatomy, UCSF, San Francisco,
California, USA
| | - Susan J. Fisher
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell
Research, Center for Reproductive Sciences, Department
of Obstetrics, Gynecology and Reproductive Sciences, Division of
Maternal Fetal Medicine, and Department of Anatomy, UCSF, San Francisco,
California, USA
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26
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A novel full-length isoform of murine pregnancy-specific glycoprotein 16 (psg16) is expressed in the brain but does not mediate murine coronavirus (MHV) entry. J Neurovirol 2013; 18:138-43. [PMID: 22302612 PMCID: PMC3368079 DOI: 10.1007/s13365-012-0081-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2011] [Accepted: 01/12/2012] [Indexed: 11/09/2022]
Abstract
The mouse pregnancy-specific glycoprotein 16 (PSG16) has been reported to be an alternative receptor for mouse hepatitis virus (MHV), some strains of which cause encephalitis in mice lacking the canonical receptor CEACAM1a. The known isoforms of PSG16 are N-terminally truncated relative to other PSG family proteins and are expressed in neurons as well as in the placenta. We have cloned a novel full-length isoform of psg16 that is also expressed in the brain, placenta, and retina but, like the truncated form, lacks MHV receptor activity when expressed on 293T cells, suggesting that PSG16 does not mediate CEACAM1a-independent spread of MHV.
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27
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Chang CL, Semyonov J, Cheng PJ, Huang SY, Park JI, Tsai HJ, Lin CY, Grützner F, Soong YK, Cai JJ, Hsu SYT. Widespread divergence of the CEACAM/PSG genes in vertebrates and humans suggests sensitivity to selection. PLoS One 2013; 8:e61701. [PMID: 23613906 PMCID: PMC3628338 DOI: 10.1371/journal.pone.0061701] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2012] [Accepted: 03/17/2013] [Indexed: 11/30/2022] Open
Abstract
In mammals, carcinoembryonic antigen cell adhesion molecules (CEACAMs) and pregnancy-specific glycoproteins (PSGs) play important roles in the regulation of pathogen transmission, tumorigenesis, insulin signaling turnover, and fetal–maternal interactions. However, how these genes evolved and to what extent they diverged in humans remain to be investigated specifically. Based on syntenic mapping of chordate genomes, we reveal that diverging homologs with a prototypic CEACAM architecture–including an extracellular domain with immunoglobulin variable and constant domain-like regions, and an intracellular domain containing ITAM motif–are present from cartilaginous fish to humans, but are absent in sea lamprey, cephalochordate or urochordate. Interestingly, the CEACAM/PSG gene inventory underwent radical divergence in various vertebrate lineages: from zero in avian species to dozens in therian mammals. In addition, analyses of genetic variations in human populations showed the presence of various types of copy number variations (CNVs) at the CEACAM/PSG locus. These copy number polymorphisms have 3–80% frequency in select populations, and encompass single to more than six PSG genes. Furthermore, we found that CEACAM/PSG genes contain a significantly higher density of nonsynonymous single nucleotide polymorphism (SNP) compared to the chromosome average, and many CEACAM/PSG SNPs exhibit high population differentiation. Taken together, our study suggested that CEACAM/PSG genes have had a more dynamic evolutionary history in vertebrates than previously thought. Given that CEACAM/PSGs play important roles in maternal–fetal interaction and pathogen recognition, these data have laid the groundwork for future analysis of adaptive CEACAM/PSG genotype-phenotypic relationships in normal and complicated pregnancies as well as other etiologies.
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Affiliation(s)
- Chia Lin Chang
- Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital Linkou Medical Center, Chang Gung University, Kweishan, Taoyuan, Taiwan.
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28
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Pregnancy-specific glycoproteins bind integrin αIIbβ3 and inhibit the platelet-fibrinogen interaction. PLoS One 2013; 8:e57491. [PMID: 23469002 PMCID: PMC3585349 DOI: 10.1371/journal.pone.0057491] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Accepted: 01/22/2013] [Indexed: 01/10/2023] Open
Abstract
Pregnancy-specific glycoproteins (PSGs) are immunoglobulin superfamily members encoded by multigene families in rodents and primates. In human pregnancy, PSGs are secreted by the syncytiotrophoblast, a fetal tissue, and reach a concentration of up to 400 ug/ml in the maternal bloodstream at term. Human and mouse PSGs induce release of anti-inflammatory cytokines such as IL-10 and TGFβ1 from monocytes, macrophages, and other cell types, suggesting an immunoregulatory function. RGD tri-peptide motifs in the majority of human PSGs suggest that they may function like snake venom disintegrins, which bind integrins and inhibit interactions with ligands. We noted that human PSG1 has a KGD, rather than an RGD motif. The presence of a KGD in barbourin, a platelet integrin αIIbβ3 antagonist found in snake venom, suggested that PSG1 may be a selective αIIbβ3 ligand. Here we show that human PSG1 binds αIIbβ3 and inhibits the platelet – fibrinogen interaction. Unexpectedly, however, the KGD is not critical as multiple PSG1 domains independently bind and inhibit αIIbβ3 function. Human PSG9 and mouse Psg23 are also inhibitory suggesting conservation of this function across primate and rodent PSG families. Our results suggest that in species with haemochorial placentation, in which maternal blood is in direct contact with fetal trophoblast, the high expression level of PSGs reflects a requirement to antagonise abundant (3 mg/ml) fibrinogen in the maternal circulation, which may be necessary to prevent platelet aggregation and thrombosis in the prothrombotic maternal environment of pregnancy.
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29
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Martinez FF, Cervi L, Knubel CP, Panzetta-Dutari GM, Motran CC. The Role of Pregnancy-Specific Glycoprotein 1a (PSG1a) in Regulating the Innate and Adaptive Immune Response. Am J Reprod Immunol 2013; 69:383-94. [DOI: 10.1111/aji.12089] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Accepted: 01/10/2013] [Indexed: 12/20/2022] Open
Affiliation(s)
- Fernando F. Martinez
- Departamento de Bioquímica Clínica; Facultad de Ciencias Químicas; Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI-CONICET); Universidad Nacional de Córdoba; Haya de la Torre y Medina Allende; Ciudad Universitaria; Córdoba; Argentina
| | - Laura Cervi
- Departamento de Bioquímica Clínica; Facultad de Ciencias Químicas; Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI-CONICET); Universidad Nacional de Córdoba; Haya de la Torre y Medina Allende; Ciudad Universitaria; Córdoba; Argentina
| | - Carolina P. Knubel
- Departamento de Bioquímica Clínica; Facultad de Ciencias Químicas; Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI-CONICET); Universidad Nacional de Córdoba; Haya de la Torre y Medina Allende; Ciudad Universitaria; Córdoba; Argentina
| | - Graciela M. Panzetta-Dutari
- Departamento de Bioquímica Clínica; Facultad de Ciencias Químicas; Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI-CONICET); Universidad Nacional de Córdoba; Haya de la Torre y Medina Allende; Ciudad Universitaria; Córdoba; Argentina
| | - Claudia C. Motran
- Departamento de Bioquímica Clínica; Facultad de Ciencias Químicas; Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI-CONICET); Universidad Nacional de Córdoba; Haya de la Torre y Medina Allende; Ciudad Universitaria; Córdoba; Argentina
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30
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Zenclussen AC. Adaptive immune responses during pregnancy. Am J Reprod Immunol 2013; 69:291-303. [PMID: 23418773 DOI: 10.1111/aji.12097] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Accepted: 01/23/2013] [Indexed: 02/05/2023] Open
Abstract
It has long been believed that there is no immune interaction between mother and conceptus during pregnancy. This concept changed after evidence was provided that the maternal immune system is aware of the semiallogeneic conceptus and develops strategies to tolerate it. Since then, finely regulated mechanisms of active tolerance toward the fetus have been described. This Special Issue of the American Journal of Reproductive Immunology deals with these mechanisms. It begins with the description of minor histocompatibility antigens in the placenta; it further goes through adaptive immune responses toward paternal fetal antigens, mostly concentrating on regulatory T cells and molecules modulating the Th1/Th2 balance. The participation of antibody-producing B cells in normal and pathological pregnancies is also discussed. This introductory chapter resumes the concepts presented throughout the Issue and discusses the clinical applications raised from these concepts.
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Affiliation(s)
- Ana Claudia Zenclussen
- Experimental Obstetrics and Gynecology, Medical Faculty, Otto-von-Guericke University, Magdeburg, Germany.
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31
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PSG gene expression is up-regulated by lysine acetylation involving histone and nonhistone proteins. PLoS One 2013; 8:e55992. [PMID: 23418492 PMCID: PMC3572148 DOI: 10.1371/journal.pone.0055992] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2012] [Accepted: 01/04/2013] [Indexed: 11/25/2022] Open
Abstract
Background Lysine acetylation is an important post-translational modification that plays a central role in eukaryotic transcriptional activation by modifying chromatin and transcription-related factors. Human pregnancy-specific glycoproteins (PSG) are the major secreted placental proteins expressed by the syncytiotrophoblast at the end of pregnancy and represent early markers of cytotrophoblast differentiation. Low PSG levels are associated with complicated pregnancies, thus highlighting the importance of studying the mechanisms that control their expression. Despite several transcription factors having been implicated as key regulators of PSG gene family expression; the role of protein acetylation has not been explored. Methodology/Principal Findings Here, we explored the role of acetylation on PSG gene expression in the human placental-derived JEG-3 cell line. Pharmacological inhibition of histone deacetylases (HDACs) up-regulated PSG protein and mRNA expression levels, and augmented the amount of acetylated histone H3 associated with PSG 5′regulatory regions. Moreover, PSG5 promoter activation mediated by Sp1 and KLF6, via the core promoter element motif (CPE, −147/−140), was markedly enhanced in the presence of the HDAC inhibitor trichostatin A (TSA). This effect correlated with an increase in Sp1 acetylation and KLF6 nuclear localization as revealed by immunoprecipitation and subcellular fractionation assays. The co-activators PCAF, p300, and CBP enhanced Sp1-dependent PSG5 promoter activation through their histone acetylase (HAT) function. Instead, p300 and CBP acetyltransferase domain was dispensable for sustaining co-activation of PSG5 promoter by KLF6. Conclusions/Significance Results are consistent with a regulatory role of lysine acetylation on PSG expression through a relaxed chromatin state and an increase in the transcriptional activity of Sp1 and KLF6 following an augmented Sp1 acetylation and KLF6 nuclear localization.
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32
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Syncytin-1 modulates placental trophoblast cell proliferation by promoting G1/S transition. Cell Signal 2013; 25:1027-35. [PMID: 23333240 DOI: 10.1016/j.cellsig.2013.01.008] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 12/22/2012] [Accepted: 01/08/2013] [Indexed: 02/07/2023]
Abstract
Placental syncytiotrophoblasts formed by the fusion of cytotrophoblasts constitute the interface between maternal and fetal circulations. The syncytium, composed of a continuous layer of syncytiotrophoblasts, assumes the fetal-maternal nutrient exchange, placental barrier, and endocrine functions important for the maintenance of normal pregnancy. Syncytin-1, an endogenous retroviral gene product, mediates the fusion of cytotrophoblasts. While the fusogenic function of syncytin-1 has been well established, little is known regarding its nonfusogenic activities. This study investigates the role of syncytin-1 in trophoblast proliferation. We found that syncytin-1 knockdown significantly inhibited BeWo cell growth and DNA synthesis. Moreover, time course studies on key cell cycle regulators demonstrated an upregulation of p15 and downregulation of CDK4, E2F1, PCNA, and c-Myc, which consequently led to a reduced level of CDK1. These results, together with those from flow cytometry analysis, indicated that syncytin-1 knockdown blocked the G1/S transition phase of the cell cycle. Moreover, syncytin-1 overexpression promoted CHO cell proliferation and led to changes opposite to those observed in syncytin-1 knockdown experiments, confirming the critical role of syncytin-1 for G1/S transition. Thus, syncytin-1, through both nonfusogenic and fusogenic, functions, may co-regulate the input (proliferation) and output (fusion) of the cytotrophoblast "pool". Such co-regulation could be an efficient way to achieve the balance between these two opposing processes, which is required for syncytium homeostasis. Since decreased syncytin-1 expression has been shown to be associated with preeclamptic and hypoxic condition, insufficient replenishing of the cytotrophoblast "pool" may contribute to syncytium deficiency, a critical pathological change frequently found in preeclamptic placentas.
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33
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Blois SM, Tirado-González I, Wu J, Barrientos G, Johnson B, Warren J, Freitag N, Klapp BF, Irmak S, Ergun S, Dveskler GS. Early expression of pregnancy-specific glycoprotein 22 (PSG22) by trophoblast cells modulates angiogenesis in mice. Biol Reprod 2012; 86:191. [PMID: 22423048 DOI: 10.1095/biolreprod.111.098251] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Mouse and human pregnancy-specific glycoproteins (PSG) are known to exert immunomodulatory functions during pregnancy by inducing maternal leukocytes to secrete anti-inflammatory cytokines that promote a tolerogenic decidual microenvironment. Many such anti-inflammatory mediators also function as proangiogenic factors, which, along with the reported association of murine PSG with the uterine vasculature, suggest that PSG may contribute to the vascular adaptations necessary for successful implantation and placental development. We observed that PSG22 is strongly expressed around the embryonic crypt on Gestation Day 5.5, indicating that trophoblast giant cells are the main source of PSG22 during the early stages of pregnancy. PSG22 treatment up-regulated the secretion of transforming growth factor beta 1 and vascular endothelial growth factor A (VEGFA) in murine macrophages, uterine dendritic cells, and natural killer cells. A possible role of PSGs in uteroplacental angiogenesis is further supported by the finding that incubation of endothelial cells with PSG22 resulted in the formation of tubes in the presence and absence of VEGFA. We determined that PSG22, like human PSG1 and murine PSG17 and PSG23, binds to the heparan sulfate chains in syndecans. Therefore, our findings indicate that despite the independent evolution and expansion of human and rodent PSG, members in both families have conserved functions that include their ability to induce anti-inflammatory cytokines and proangiogenic factors as well as to induce the formation of capillary structures by endothelial cells. In summary, our results indicate that PSG22, the most abundant PSG expressed during mouse early pregnancy, is likely a major contributor to the establishment of a successful pregnancy.
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Affiliation(s)
- Sandra M Blois
- Charité Centrum 12 für Innere Medizin und Dermatologie, Reproductive Medicine Research Group, University Medicine of Berlin, Berlin, Germany.
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Martínez FF, Knubel CP, Sánchez MC, Cervi L, Motrán CC. Pregnancy-specific glycoprotein 1a activates dendritic cells to provide signals for Th17-, Th2-, and Treg-cell polarization. Eur J Immunol 2012; 42:1573-84. [DOI: 10.1002/eji.201142140] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Review: Parent-offspring conflict and the control of placental function. Placenta 2012; 33 Suppl:S33-6. [DOI: 10.1016/j.placenta.2011.11.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Revised: 11/16/2011] [Accepted: 11/18/2011] [Indexed: 11/18/2022]
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Paiva P, Whitehead C, Saglam B, Palmer K, Tong S. Measurement of mRNA transcripts of very high placental expression in maternal blood as biomarkers of preeclampsia. J Clin Endocrinol Metab 2011; 96:E1807-15. [PMID: 21865357 DOI: 10.1210/jc.2011-1233] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
CONTEXT mRNA of placental origin in maternal blood shows potential as a clinical biomarker of obstetric diseases such as preeclampsia (PE). We hypothesized that mRNA transcripts very highly expressed in the placenta relative to other tissues will be differentially expressed in PE and be useful as mRNA biomarkers in maternal blood. OBJECTIVE Our objective was to identify a panel of genes highly expressed in the placenta and compare their expression in placenta and maternal whole blood from PE vs. control pregnancies. SETTING Placental tissue and maternal whole blood specimens were obtained from normotensive controls (n = 15) and pregnancies complicated by severe preterm PE (n = 21). INTERVENTION mRNA expression was evaluated by quantitative real-time RT-PCR. RESULTS We identified 20 genes exhibiting highest to fourth highest expression in the placenta relative to all other tissues. All genes were detectable in placenta. Nine of the 20 genes were detectable in maternal whole blood. Four of the nine genes detectable in blood (i.e. PLAC3, PLAC4, CRH, and ERVWE1) were significantly increased in both maternal blood and placenta from PE pregnancies. The remaining five genes detectable in maternal blood were unchanged in both blood and placenta from PE pregnancies. Thus, there was complete correlation of gene expression between maternal blood and placenta. CONCLUSIONS Circulating mRNA coding genes of high placental expression show strong correlation with transcript levels in preeclamptic placenta. Such transcripts may be promising candidates to screen as mRNA biomarkers of PE in maternal whole blood.
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Affiliation(s)
- Premila Paiva
- The Ritchie Centre, Monash Institute of Medical Research, Monash University, Clayton, Victoria 3168, Australia
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Sulkowski GN, Warren J, Ha CT, Dveksler GS. Characterization of receptors for murine pregnancy specific glycoproteins 17 and 23. Placenta 2011; 32:603-10. [PMID: 21669460 DOI: 10.1016/j.placenta.2011.05.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2011] [Revised: 05/16/2011] [Accepted: 05/18/2011] [Indexed: 10/18/2022]
Abstract
In primates and rodents, trophoblast cells synthesize and secrete into the maternal circulation a family of proteins known as pregnancy specific glycoproteins (PSG). The current study was undertaken to characterize the receptor for two members of the murine PSG family, PSG17 and PSG23. Binding of recombinant PSG17 and PSG23 to CHO-K1 and L929 cells and their derived mutants was performed to determine whether these proteins bound to cell surface proteoglycans. We also examined binding of these proteins to cells transfected with syndecans and glypican-1 by flow cytometry. The interaction with glycosaminoglycans was confirmed in solid phase assays. Our results show that PSG17 binds to CD9 and to cell surface proteoglycans while PSG23 binds only to the latter. We found that the amino acids involved in CD9 binding reside in the region of highest divergence between the N1-domains of murine PSGs. For both proteins, the N-terminal domain (designated as N1) is sufficient for binding to cells and the ability to bind cell surface proteoglycans is affected by the cell line employed to generate the recombinant proteins. We conclude that while substantially different at the amino acid level, some murine PSGs share with human PSG1 the ability to bind to cell surface proteoglycans and that at least one PSG binds to more than one type of molecule on the cell surface.
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Affiliation(s)
- G N Sulkowski
- Department of Pathology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
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Lisboa FA, Warren J, Sulkowski G, Aparicio M, David G, Zudaire E, Dveksler GS. Pregnancy-specific glycoprotein 1 induces endothelial tubulogenesis through interaction with cell surface proteoglycans. J Biol Chem 2010; 286:7577-86. [PMID: 21193412 DOI: 10.1074/jbc.m110.161810] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Pregnancy-specific β1 glycoproteins (PSGs) are the most abundant fetal proteins in the maternal bloodstream in late pregnancy. They are secreted by the syncytiotrophoblast and are detected around day 14 postfertilization. There are 11 human PSG genes, which encode a family of proteins exhibiting significant conservation at the amino acid level. We and others have proposed that PSGs have an immune modulatory function. In addition, we recently postulated that they are proangiogenic due to their ability to induce the secretion of VEGF-A and the formation of tubes by endothelial cells. The cellular receptor(s) for human PSGs remain unknown. Therefore, we conducted these studies to identify the receptor for PSG1, the highest expressed member of the family. We show that removal of cell surface glycosaminoglycans (GAGs) by enzymatic or chemical treatment of cells or competition with heparin completely inhibited binding of PSG1. In addition, PSG1 did not bind to cells lacking heparan or chondroitin sulfate on their surface, and binding was restored upon transfection with all four syndecans and glypican-1. Importantly, the presence of GAGs on the surface of endothelial cells was required for the ability of PSG1 to induce tube formation. This finding indicates that the PSG1-GAG interaction mediates at least some of the PSG1 proposed functions.
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Affiliation(s)
- Felipe A Lisboa
- Department of Pathology, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814, USA
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