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Brockway HM, Wilson SL, Kallapur SG, Buhimschi CS, Muglia LJ, Jones HN. Characterization of methylation profiles in spontaneous preterm birth placental villous tissue. PLoS One 2023; 18:e0279991. [PMID: 36952446 PMCID: PMC10035933 DOI: 10.1371/journal.pone.0279991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Indexed: 03/25/2023] Open
Abstract
Preterm birth is a global public health crisis which results in significant neonatal and maternal mortality. Yet little is known regarding the molecular mechanisms of idiopathic spontaneous preterm birth, and we have few diagnostic markers for adequate assessment of placental development and function. Previous studies of placental pathology and our transcriptomics studies suggest a role for placental maturity in idiopathic spontaneous preterm birth. It is known that placental DNA methylation changes over gestation. We hypothesized that if placental hypermaturity is present in our samples, we would observe a unique idiopathic spontaneous preterm birth DNA methylation profile potentially driving the gene expression differences we previously identified in our placental samples. Our results indicate the idiopathic spontaneous preterm birth DNA methylation pattern mimics the term birth methylation pattern suggesting hypermaturity. Only seven significant differentially methylated regions fitting the idiopathic spontaneous preterm birth specific (relative to the controls) profile were identified, indicating unusually high similarity in DNA methylation between idiopathic spontaneous preterm birth and term birth samples. We identified an additional 1,718 significantly methylated regions in our gestational age matched controls where the idiopathic spontaneous preterm birth DNA methylation pattern mimics the term birth methylation pattern, again indicating a striking level of similarity between the idiopathic spontaneous preterm birth and term birth samples. Pathway analysis of these regions revealed differences in genes within the WNT and Cadherin signaling pathways, both of which are essential in placental development and maturation. Taken together, these data demonstrate that the idiopathic spontaneous preterm birth samples display a hypermature methylation signature than expected given their respective gestational age which likely impacts birth timing.
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Affiliation(s)
- Heather M. Brockway
- Department of Physiology and Functional Genomics, College of Medicine at the University of Florida, Gainesville, Florida, United States of America
| | - Samantha L. Wilson
- Princess Margaret Cancer Centre, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Suhas G. Kallapur
- Divisions of Neonatology and Developmental Biology, David Geffen School of Medicine at the University of California, UCLA Mattel Children’s Hospital, Los Angeles, California, United States of America
| | - Catalin S. Buhimschi
- Department of Obstetrics and Gynecology, The University of Illinois College of Medicine, Chicago, Illinois, United States of America
| | - Louis J. Muglia
- Burroughs Wellcome Fund, Research Triangle Park, North Carolina, United States of America
| | - Helen N. Jones
- Department of Physiology and Functional Genomics, College of Medicine at the University of Florida, Gainesville, Florida, United States of America
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Gundling WE, Post S, Illsley NP, Echalar L, Zamudio S, Wildman DE. Ancestry dependent balancing selection of placental dysferlin at high-altitude. Front Cell Dev Biol 2023; 11:1125972. [PMID: 37025168 PMCID: PMC10070852 DOI: 10.3389/fcell.2023.1125972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 03/06/2023] [Indexed: 04/08/2023] Open
Abstract
Introduction: The placenta mediates fetal growth by regulating gas and nutrient exchange between the mother and the fetus. The cell type in the placenta where this nutrient exchange occurs is called the syncytiotrophoblast, which is the barrier between the fetal and maternal blood. Residence at high-altitude is strongly associated with reduced 3rd trimester fetal growth and increased rates of complications such as preeclampsia. We asked whether altitude and/or ancestry-related placental gene expression contributes to differential fetal growth under high-altitude conditions, as native populations have greater fetal growth than migrants to high-altitude. Methods: We have previously shown that methylation differences largely accounted for altitude-associated differences in placental gene expression that favor improved fetal growth among high-altitude natives. We tested for differences in DNA methylation between Andean and European placental samples from Bolivia [La Paz (∼3,600 m) and Santa Cruz, Bolivia (∼400 m)]. One group of genes showing significant altitude-related differences are those involved in cell fusion and membrane repair in the syncytiotrophoblast. Dysferlin (DYSF) shows greater expression levels in high- vs. low-altitude placentas, regardless of ancestry. DYSF has a single nucleotide variant (rs10166384;G/A) located at a methylation site that can potentially stimulate or repress DYSF expression. Following up with individual DNA genotyping in an expanded sample size, we observed three classes of DNA methylation that corresponded to individual genotypes of rs10166384 (A/A < A/G < G/G). We tested whether these genotypes are under Darwinian selection pressure by sequencing a ∼2.5 kb fragment including the DYSF variants from 96 Bolivian samples and compared them to data from the 1000 genomes project. Results: We found that balancing selection (Tajima's D = 2.37) was acting on this fragment among Andeans regardless of altitude, and in Europeans at high-altitude (Tajima's D = 1.85). Discussion: This supports that balancing selection acting on dysferlin is capable of altering DNA methylation patterns based on environmental exposure to high-altitude hypoxia. This finding is analogous to balancing selection seen frequency-dependent selection, implying both alleles are advantageous in different ways depending on environmental circumstances. Preservation of the adenine (A) and guanine (G) alleles may therefore aid both Andeans and Europeans in an altitude dependent fashion.
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Affiliation(s)
- William E. Gundling
- Department of Biology, Christian Brothers University, Memphis, TN, United States
- *Correspondence: Derek E. Wildman, ; William E. Gundling,
| | - Sasha Post
- College of Public Health, University of South Florida, Tampa, FL, United States
| | | | - Lourdes Echalar
- Instituto Boliviano de Biología de Altura, Universidad de San Andreas Mayor, La Paz, Bolivia
| | - Stacy Zamudio
- Placental Research Group LLC., Maplewood, NJ, United States
| | - Derek E. Wildman
- College of Public Health, University of South Florida, Tampa, FL, United States
- *Correspondence: Derek E. Wildman, ; William E. Gundling,
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Mukherjee I, Dhar R, Singh S, Sharma JB, Nag TC, Mridha AR, Jaiswal P, Biswas S, Karmakar S. Oxidative stress-induced impairment of trophoblast function causes preeclampsia through the unfolded protein response pathway. Sci Rep 2021; 11:18415. [PMID: 34531444 DOI: 10.1038/s41598-021-97799-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 08/30/2021] [Indexed: 11/30/2022] Open
Abstract
Pre-eclampsia (PE) is a pregnancy-specific disorder, characterized by hypertension and proteinuria. In PE, trophoblasts mediated inadequate remodeling of uterine spiral arteries seem to interrupt uteroplacental blood flow, one of the hallmarks in the early onset of PE (EO-PE). This, in turn, results in placental ischemia–reperfusion injury during hypoxia and reoxygenation episodes, leading to the generation of reactive oxygen species (ROS) and oxidative stress (OS). But still it is debatable if OS is a cause or consequence of PE. In this present study, we have investigated the effects of OS on PE placentae and trophoblast cell functions using BeWo and HTR8/SVneo cell lines. PE placental tissues showed abnormal ultrastructure, high level of reactive oxygen species (ROS) with altered unfolded protein responses (UPR) in compare with term placental tissues. Similar to PE placentae, during OS induction, the trophoblast cells showed altered invasion and migration properties with significantly variable expression of differentiation and invasion markers, e.g., syncytin and MMPs. The effect was rescued by antioxidant, N-acetyl cysteine, thereby implying a ROS-specific effect and in the trophoblast cells, OS triggers UPR pathway through IRE1α-XBP1 axis. Taken together, these findings highlight the harmful effect of unfolded protein response, which was induced due to OS on trophoblast cells and deformed invasion and differentiation programme and can be extended further to clinical settings to identify clinically approved antioxidants during pregnancy as a therapeutic measure to reduce the onset of PE.
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Hirata AHDL, Rocha LADJ, da Silva VA, de Almeida RJ, Bacigalupo LDS, Varela P, Martins L, Pesquero JB, Dellê H, Camacho CP. Circulating RNA Transcriptome of Pregnant Women with TSH Just Above the Trimester-Specific Reference and its Correlation with the Hypertensive Phenotype. Sci Rep 2020; 10:6439. [PMID: 32296081 PMCID: PMC7160149 DOI: 10.1038/s41598-020-63040-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 03/19/2020] [Indexed: 11/09/2022] Open
Abstract
During gestation, a woman’s body undergoes physiological changes that alter thyroid function. Pregnant women with hypothyroidism may exhibit gestational complications, including hypertension and preeclampsia. We investigated differentially expressed genes (DEGs) in circulating RNAs from pregnant women with TSH levels just above the normal range to determine the impact of a mild elevation of TSH in pregnancy. We selected three women with healthy thyroid pregnancy (HTP), three pregnant women with gestational hypothyroidism (GHT), and three nonpregnant women (NPG) to construct transcriptome libraries. We also compared our results with data from the GEO dataset and DisGeNET. We identified 1500 DEG in GHT and 1656 DEG in HTP. From GEO dataset, we recognized 453 DEGs in trimester-specific plasma RNA, 1263 DEGs in placental tissues from healthy women, 1031 DEGs from preeclamptic uteroplacental tissues and 1657 DEGs from placental tissues from severely preeclamptic women. In this scenario, 12.26% and 12.86% genes were shared between these datasets in GHT and HTP, respectively. We stablished 62 genes in GHT DEGs related to hypertensive phenotype hallmarks. In conclusion, even in women with a mild TSH increment, we were able to detect some DEGs that could be associated with a hypertensive phenotype.
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Affiliation(s)
- Andréa Harumy de Lima Hirata
- Molecular Innovation and Biotechnology Laboratory, Postgraduate Program in Medicine, Universidade Nove de Julho (Uninove), São Paulo, SP, Brazil
| | - Luiz Antônio de Jesus Rocha
- Molecular Innovation and Biotechnology Laboratory, Postgraduate Program in Medicine, Universidade Nove de Julho (Uninove), São Paulo, SP, Brazil
| | - Valdelena Alessandra da Silva
- Molecular Innovation and Biotechnology Laboratory, Postgraduate Program in Medicine, Universidade Nove de Julho (Uninove), São Paulo, SP, Brazil
| | - Robson José de Almeida
- Molecular Innovation and Biotechnology Laboratory, Postgraduate Program in Medicine, Universidade Nove de Julho (Uninove), São Paulo, SP, Brazil
| | - Lucas Dos Santos Bacigalupo
- Molecular Innovation and Biotechnology Laboratory, Postgraduate Program in Medicine, Universidade Nove de Julho (Uninove), São Paulo, SP, Brazil.,Department of Obstetrics and Gynecology, Conjunto Hospitalar do Mandaqui, São Paulo, SP, Brazil
| | - Patrícia Varela
- Center for Research and Molecular Diagnostic of Genetic Diseases, Department of Biophysics, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil
| | - Leonardo Martins
- Center for Research and Molecular Diagnostic of Genetic Diseases, Department of Biophysics, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil
| | - João Bosco Pesquero
- Center for Research and Molecular Diagnostic of Genetic Diseases, Department of Biophysics, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil
| | - Humberto Dellê
- Molecular Innovation and Biotechnology Laboratory, Postgraduate Program in Medicine, Universidade Nove de Julho (Uninove), São Paulo, SP, Brazil
| | - Cleber Pinto Camacho
- Molecular Innovation and Biotechnology Laboratory, Postgraduate Program in Medicine, Universidade Nove de Julho (Uninove), São Paulo, SP, Brazil.
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Dubey R, Malhotra SS, Gupta SK. Forskolin-mediated BeWo cell fusion involves down-regulation of miR-92a-1-5p that targets dysferlin and protein kinase cAMP-activated catalytic subunit alpha. Am J Reprod Immunol 2018; 79:e12834. [PMID: 29484758 DOI: 10.1111/aji.12834] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 02/04/2018] [Indexed: 12/16/2022] Open
Abstract
PROBLEM To study the role of miRNA(s) during trophoblastic BeWo cell fusion. METHOD OF STUDY Changes in miRNA(s) profile of BeWo cells treated with forskolin were analyzed using Affymetrix miRNA microarray platform. Down-regulated miRNA, miR-92a-1-5p, was overexpressed in BeWo cells followed by forskolin treatment to understand its relevance in the process of BeWo cell fusion by desmoplakin I+II staining and hCG secretion by ELISA. Predicted targets of miR-92a-1-5p were also confirmed by qRT-PCR/Western blotting. RESULTS The miRNA profiling of BeWo cells after forskolin (25 μmol/L) treatment identified miR-92a-1-5p as the most significantly down-regulated miRNA both at 24 and 48 hours time points. Overexpression of miR-92a-1-5p in these cells led to a significant decrease in forskolin-mediated cell fusion and hCG secretion. miRNA target prediction software, TargetScan, revealed dysferlin (DYSF) and protein kinase cAMP-activated catalytic subunit alpha (PRKACA), as target genes of miR-92a-1-5p. Overexpression of miR-92a-1-5p in BeWo cells showed reduction in forskolin-induced transcripts for DYSF and PRKACA. Further, reduction in DYSF (~2.6-fold) at protein level and PRKACA-encoded protein kinase A catalytic subunit alpha (PKAC-α; ~1.6-fold) were also observed. CONCLUSION These observations suggest that miR-92a-1-5p regulates forskolin-mediated BeWo cell fusion and hCG secretion by regulating PKA signaling pathway and dysferlin expression.
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Affiliation(s)
- Richa Dubey
- Reproductive Cell Biology Laboratory, National Institute of Immunology, New Delhi, India
| | - Sudha S Malhotra
- Reproductive Cell Biology Laboratory, National Institute of Immunology, New Delhi, India
| | - Satish K Gupta
- Reproductive Cell Biology Laboratory, National Institute of Immunology, New Delhi, India
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Sarath Babu N, Krishnan S, Brahmendra Swamy CV, Venkata Subbaiah GP, Gurava Reddy AV, Idris MM. Quantitative proteomic analysis of normal and degenerated human intervertebral disc. Spine J 2016; 16:989-1000. [PMID: 27125197 DOI: 10.1016/j.spinee.2016.03.051] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Revised: 03/04/2016] [Accepted: 03/31/2016] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Degenerative disc disease (DDD) is the most common disease of aging in humans. DDD is characterized by the gradual damage of the intervertebral discs. The disease is characterized by progressive dehydration of nucleus pulposus and disruption of annulus fibrosus of intervertebral disc. PURPOSE Even though it is highly prevalent, there is no effective therapy to regenerate the degenerated disc, or decrease or halt the disease progression. Therefore, novel monitoring and diagnostic tests are essential to develop an alternative therapeutic strategies which can prevent further progression of disc degeneration. STUDY DESIGN The study was designed to understand the proteome map of annulus fibrosus and nucleus pulposus tissues of intervertebral disc and its differential expression in patients with DDD. METHODS The proteome map of the annulus fibrosus and nucleus pulposus tissues of intervertebral disc was cataloged involving one-dimensional gel electrophoresis-Fourier transform mass spectrometry/ion trap tandem mass spectrometry (FTMS/ITMSMS) analysis. The altered proteome patterns of annulus fibrosus and nucleus pulposus tissues for DDD were identified using Isobaric tag for relative and absolute quantification (iTRAQ)-based quantitative proteomics coupled with FTMS/ITMSMS and network pathway analysis. RESULTS The study identified a total of 759 and 692 proteins from the annulus fibrosus and the nucleus pulposus tissues of the disc based on FTMS/ITMSMS analysis, which includes 118 proteins commonly identified between the two tissues. Vibrant changes were observed between the normal and the degenerating annulus fibrosus and nucleus pulposus tissues. A total of 73 and 54 proteins were identified as differentially regulated in the annulus and the nucleus tissues, respectively, between the normal and the degenerated tissues independently. Network pathway analysis mapped the differentially expressed proteins to cell adhesion, cell migration, and interleukin13 signaling pathways. CONCLUSIONS Altogether, the current study provides a novel vision in the biomechanism of human disc degeneration and a certain number of proteins with the potential biomarker value for the preliminary diagnosis and scenario of DDD.
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Affiliation(s)
| | | | | | - Goli P Venkata Subbaiah
- Sunshine Hospitals, SMART (Sunshine Medical Academy For Research and Training), Penderghast Rd, Secunderabad, 500003, India
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Cárdenas AM, González-Jamett AM, Cea LA, Bevilacqua JA, Caviedes P. Dysferlin function in skeletal muscle: Possible pathological mechanisms and therapeutical targets in dysferlinopathies. Exp Neurol 2016; 283:246-54. [PMID: 27349407 DOI: 10.1016/j.expneurol.2016.06.026] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 06/22/2016] [Accepted: 06/23/2016] [Indexed: 12/18/2022]
Abstract
Mutations in the dysferlin gene are linked to a group of muscular dystrophies known as dysferlinopathies. These myopathies are characterized by progressive atrophy. Studies in muscle tissue from dysferlinopathy patients or dysferlin-deficient mice point out its importance in membrane repair. However, expression of dysferlin homologous proteins that restore sarcolemma repair function in dysferlinopathy animal models fail to arrest muscle wasting, therefore suggesting that dysferlin plays other critical roles in muscle function. In the present review, we discuss dysferlin functions in the skeletal muscle, as well as pathological mechanisms related to dysferlin mutations. Particular focus is presented related the effect of dysferlin on cell membrane related function, which affect its repair, vesicle trafficking, as well as Ca(2+) homeostasis. Such mechanisms could provide accessible targets for pharmacological therapies.
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Affiliation(s)
- Ana M Cárdenas
- Centro Interdisciplinario de Neurociencia de Valparaíso, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso, Chile.
| | - Arlek M González-Jamett
- Centro Interdisciplinario de Neurociencia de Valparaíso, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso, Chile; Programa de Anatomía y Biología del Desarrollo, ICBM, Facultad de Medicina, Departamento de Neurología y Neurocirugía, Hospital Clínico Universidad de Chile, Universidad de Chile, Santiago, Chile
| | - Luis A Cea
- Programa de Anatomía y Biología del Desarrollo, ICBM, Facultad de Medicina, Departamento de Neurología y Neurocirugía, Hospital Clínico Universidad de Chile, Universidad de Chile, Santiago, Chile
| | - Jorge A Bevilacqua
- Programa de Anatomía y Biología del Desarrollo, ICBM, Facultad de Medicina, Departamento de Neurología y Neurocirugía, Hospital Clínico Universidad de Chile, Universidad de Chile, Santiago, Chile
| | - Pablo Caviedes
- Programa de Farmacología Molecular y Clinica, ICBM, Facultad de Medicina, Universidad de Chile, Santiago, Chile
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Carmeille R, Degrelle SA, Plawinski L, Bouvet F, Gounou C, Evain-Brion D, Brisson AR, Bouter A. Annexin-A5 promotes membrane resealing in human trophoblasts. Biochim Biophys Acta 2015; 1853:2033-44. [PMID: 25595530 DOI: 10.1016/j.bbamcr.2014.12.038] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Revised: 11/25/2014] [Accepted: 12/27/2014] [Indexed: 01/12/2023]
Abstract
Annexin-A5 (AnxA5) is the smallest member of the annexins, a group of soluble proteins that bind to membranes containing negatively-charged phospholipids, principally phosphatidylserine, in a Ca(2+)-dependent manner. AnxA5 presents unique properties of binding and self-assembling on membrane surfaces, forming highly ordered two-dimensional (2D) arrays. We showed previously that AnxA5 plays a central role in the machinery of cell membrane repair of murine perivascular cells, promoting the resealing of membrane damages via the formation of 2D protein arrays at membrane disrupted sites and preventing the extension of membrane ruptures. As the placenta is one of the richest source of AnxA5 in humans, we investigated whether AnxA5 was involved in membrane repair in this organ. We addressed this question at the level of human trophoblasts, either mononucleated cytotrophoblasts or multinucleated syncytiotrophoblasts, in choriocarcinoma cells and primary trophoblasts. Using established procedure of laser irradiation and fluorescence microscopy, we observed that both human cytotrophoblasts and syncytiotrophoblasts repair efficiently a μm²-size disruption. Compared to wild-type cells, AnxA5-deficient trophoblasts exhibit severe defect of membrane repair. Through specifically binding to the disrupted site as early as a few seconds after membrane wounding, AnxA5 promotes membrane resealing of injured human trophoblasts. In addition, we observed that a large membrane area containing the disrupted site was released in the extracellular milieu. We propose mechanisms ensuring membrane resealing and subsequent lesion removal in human trophoblasts. This article is part of a Special Issue entitled: 13th European Symposium on Calcium.
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Affiliation(s)
- Romain Carmeille
- Institute of Chemistry and Biology of Membranes and Nano-objects, UMR 5248, CNRS, University of Bordeaux, IPB, F-33600 Pessac, France
| | - Séverine A Degrelle
- Fondation PremUP, Paris, F-75006, France; INSERM, U1139, Paris, F-75006, France; Université Paris Descartes, UMR-S1139 Sorbonne Pris Cité, Paris, F-75006, France
| | - Laurent Plawinski
- Institute of Chemistry and Biology of Membranes and Nano-objects, UMR 5248, CNRS, University of Bordeaux, IPB, F-33600 Pessac, France
| | - Flora Bouvet
- Institute of Chemistry and Biology of Membranes and Nano-objects, UMR 5248, CNRS, University of Bordeaux, IPB, F-33600 Pessac, France
| | - Céline Gounou
- Institute of Chemistry and Biology of Membranes and Nano-objects, UMR 5248, CNRS, University of Bordeaux, IPB, F-33600 Pessac, France
| | - Danièle Evain-Brion
- Fondation PremUP, Paris, F-75006, France; INSERM, U1139, Paris, F-75006, France; Université Paris Descartes, UMR-S1139 Sorbonne Pris Cité, Paris, F-75006, France
| | - Alain R Brisson
- Institute of Chemistry and Biology of Membranes and Nano-objects, UMR 5248, CNRS, University of Bordeaux, IPB, F-33600 Pessac, France
| | - Anthony Bouter
- Institute of Chemistry and Biology of Membranes and Nano-objects, UMR 5248, CNRS, University of Bordeaux, IPB, F-33600 Pessac, France.
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Gonzalez IM, Ackerman WE, Vandre DD, Robinson JM. Exocyst complex protein expression in the human placenta. Placenta 2014; 35:442-9. [PMID: 24856041 DOI: 10.1016/j.placenta.2014.04.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Revised: 04/21/2014] [Accepted: 04/24/2014] [Indexed: 12/21/2022]
Abstract
INTRODUCTION Protein production and secretion are essential to syncytiotrophoblast function and are associated with cytotrophoblast cell fusion and differentiation. Syncytiotrophoblast hormone secretion is a crucial determinant of maternal-fetal health, and can be misregulated in pathological pregnancies. Although, polarized secretion is a key component of placental function, the mechanisms underlying this process are poorly understood. OBJECTIVE While the octameric exocyst complex is classically regarded as a master regulator of secretion in various mammalian systems, its expression in the placenta remained unexplored. We hypothesized that the syncytiotrophoblast would express all exocyst complex components and effector proteins requisite for vesicle-mediated secretion more abundantly than cytotrophoblasts in tissue specimens. METHODS A two-tiered immunobiological approach was utilized to characterize exocyst and ancillary proteins in normal, term human placentas. Exocyst protein expression and localization was documented in tissue homogenates via immunoblotting and immunofluorescence labeling of placental sections. RESULTS The eight exocyst proteins, EXOC1, 2, 3, 4, 5, 6, 7, and 8, were found in the human placenta. In addition, RAB11, an important exocyst complex modulator, was also expressed. Exocyst and Rab protein expression appeared to be regulated during trophoblast differentiation, as the syncytiotrophoblast expressed these proteins with little, if any, expression in cytotrophoblast cells. Additionally, exocyst proteins were localized at or near the syncytiotrophoblast apical membrane, the major site of placental secretion. DISCUSSION/CONCLUSION Our findings highlight exocyst protein expression as novel indicators of trophoblast differentiation. The exocyst's regulated localization within the syncytiotrophoblast in conjunction with its well known functions suggests a possible role in placental polarized secretion.
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Affiliation(s)
- I M Gonzalez
- Department of Physiology and Cell Biology, Ohio State University, Columbus, OH, USA.
| | - W E Ackerman
- Department of Obstetrics and Gynecology, Ohio State University, Columbus, OH, USA.
| | - D D Vandre
- Department of Biomedical Sciences, Western Michigan University School of Medicine, Kalamazoo, MI, USA.
| | - J M Robinson
- Department of Physiology and Cell Biology, Ohio State University, Columbus, OH, USA.
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Hornsey MA, Laval SH, Barresi R, Lochmüller H, Bushby K. Muscular dystrophy in dysferlin-deficient mouse models. Neuromuscul Disord 2013; 23:377-87. [DOI: 10.1016/j.nmd.2013.02.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Revised: 01/09/2013] [Accepted: 02/05/2013] [Indexed: 11/17/2022]
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Leung C, Yu C, Lin MI, Tognon C, Bernatchez P. Expression of myoferlin in human and murine carcinoma tumors: role in membrane repair, cell proliferation, and tumorigenesis. Am J Pathol 2013; 182:1900-9. [PMID: 23499551 DOI: 10.1016/j.ajpath.2013.01.041] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Revised: 01/18/2013] [Accepted: 01/23/2013] [Indexed: 12/19/2022]
Abstract
Cancer cells are often characterized by high proliferation rates, a consequence of increased mitotic signaling coupled with unchecked cellular growth. We recently demonstrated that vascular endothelial cells unexpectedly express ferlins, a family of muscle-specific proteins capable of regulating the fusion of lipid patches to the plasma membrane, and that these highly regulated membrane fusion events are essential to endothelial cell proliferation and homeostasis. Here, we show that human and mouse breast cancer cell lines also express myoferlin at various levels, and that the processes of transformation, epithelial-mesenchymal transition, and metastasis do not appear to have any effect on myoferlin expression in vitro. In vivo, we observed that solid mouse and human carcinoma tissues also express high levels of myoferlin protein. Loss-of-function studies performed in mice revealed that myoferlin gene knockdown can attenuate cancer cell proliferation in vitro and decrease tumor burden, and that accelerated tumor cell growth appears to rely on intact myoferlin-dependent membrane repair and signaling under exponential growth conditions. To our knowledge, these data provide the first evidence of myoferlin expression in solid human and mouse tumors. We have thus identified a novel membrane repair process that likely helps sustain the high growth rates characteristic of tumors, and we suggest that interfering with normal myoferlin expression and/or membrane repair and remodeling may provide therapeutically relevant antiproliferative effects.
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Walton JR, Frey HA, Vandre DD, Kwiek JJ, Ishikawa T, Takizawa T, Robinson JM, Ackerman WE. Expression of flotillins in the human placenta: potential implications for placental transcytosis. Histochem Cell Biol 2012; 139:487-500. [PMID: 23064789 DOI: 10.1007/s00418-012-1040-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/30/2012] [Indexed: 02/07/2023]
Abstract
A proteomics survey of human placental syncytiotrophoblast (ST) apical plasma membranes revealed peptides corresponding to flotillin-1 (FLOT1) and flotillin-2 (FLOT2). The flotillins belong to a class of lipid microdomain-associated integral membrane proteins that have been implicated in clathrin- and caveolar-independent endocytosis. In the present study, we characterized the expression of the flotillin proteins within the human placenta. FLOT1 and FLOT2 were coexpressed in placental lysates and BeWo human trophoblast cells. Immunofluorescence microscopy of first-trimester and term placentas revealed that both proteins were more prominent in villous endothelial cells and cytotrophoblasts (CTs) than the ST. Correspondingly, forskolin-induced fusion in BeWo cells resulted in a decrease in FLOT1 and FLOT2, suggesting that flotillin protein expression is reduced following trophoblast syncytialization. The flotillin proteins co-localized with a marker of fluid-phase pinocytosis, and knockdown of FLOT1 and/or FLOT2 expression resulted in decreased endocytosis of cholera toxin B subunit. We conclude that FLOT1 and FLOT2 are abundantly coexpressed in term villous placental CTs and endothelial cells, and in comparison, expression of these proteins in the ST is reduced. These findings suggest that flotillin-dependent endocytosis is unlikely to be a major pathway in the ST, but may be important in the CT and endothelium.
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Affiliation(s)
- Janelle R Walton
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
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Vandré DD, Ackerman WE, Tewari A, Kniss DA, Robinson JM. A placental sub-proteome: the apical plasma membrane of the syncytiotrophoblast. Placenta 2012; 33:207-13. [PMID: 22222045 PMCID: PMC3277652 DOI: 10.1016/j.placenta.2011.12.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Revised: 11/29/2011] [Accepted: 12/13/2011] [Indexed: 10/14/2022]
Abstract
As a highly vascularized tissue, the placenta mediates gas and solute exchange between maternal and fetal circulations. In the human placenta, the interface with maternal blood is a unique epithelial structure known as the syncytiotrophoblast. Previously we developed a colloidal-silica based method to generate highly enriched preparations of the apical plasma membrane of the syncytiotrophoblast. Using similar preparations, a proteomics assessment of this important sub-proteome has identified 340 proteins as part of this apical membrane fraction. The expression of 38 of these proteins was previously unknown in the human placental syncytiotrophoblast. Together with previous studies, the current proteomic database expands our knowledge of the proteome of the syncytiotrophoblast apical plasma membrane from normal placentas to include more than 500 proteins. This database is a valuable resource for future comparisons to diseased placentas. Additionally, this data set provides a basis for further experimental studies of placenta and trophoblast function.
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Affiliation(s)
- D D Vandré
- Department of Physiology and Cell Biology, Ohio State University, 304 Hamilton Hall, 1645 Neil Ave., Columbus, OH 43210, USA.
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14
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Li R, Ackerman WE, Summerfield TL, Yu L, Gulati P, Zhang J, Huang K, Romero R, Kniss DA. Inflammatory gene regulatory networks in amnion cells following cytokine stimulation: translational systems approach to modeling human parturition. PLoS One 2011; 6:e20560. [PMID: 21655103 PMCID: PMC3107214 DOI: 10.1371/journal.pone.0020560] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2011] [Accepted: 05/05/2011] [Indexed: 11/18/2022] Open
Abstract
A majority of the studies examining the molecular regulation of human labor have been conducted using single gene approaches. While the technology to produce multi-dimensional datasets is readily available, the means for facile analysis of such data are limited. The objective of this study was to develop a systems approach to infer regulatory mechanisms governing global gene expression in cytokine-challenged cells in vitro, and to apply these methods to predict gene regulatory networks (GRNs) in intrauterine tissues during term parturition. To this end, microarray analysis was applied to human amnion mesenchymal cells (AMCs) stimulated with interleukin-1β, and differentially expressed transcripts were subjected to hierarchical clustering, temporal expression profiling, and motif enrichment analysis, from which a GRN was constructed. These methods were then applied to fetal membrane specimens collected in the absence or presence of spontaneous term labor. Analysis of cytokine-responsive genes in AMCs revealed a sterile immune response signature, with promoters enriched in response elements for several inflammation-associated transcription factors. In comparison to the fetal membrane dataset, there were 34 genes commonly upregulated, many of which were part of an acute inflammation gene expression signature. Binding motifs for nuclear factor-κB were prominent in the gene interaction and regulatory networks for both datasets; however, we found little evidence to support the utilization of pathogen-associated molecular pattern (PAMP) signaling. The tissue specimens were also enriched for transcripts governed by hypoxia-inducible factor. The approach presented here provides an uncomplicated means to infer global relationships among gene clusters involved in cellular responses to labor-associated signals.
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Affiliation(s)
- Ruth Li
- Division of Maternal-Fetal Medicine and Laboratory of Perinatal Research,
Department of Obstetrics and Gynecology, The Ohio State University, Columbus,
Ohio, United States of America
| | - William E. Ackerman
- Division of Maternal-Fetal Medicine and Laboratory of Perinatal Research,
Department of Obstetrics and Gynecology, The Ohio State University, Columbus,
Ohio, United States of America
| | - Taryn L. Summerfield
- Division of Maternal-Fetal Medicine and Laboratory of Perinatal Research,
Department of Obstetrics and Gynecology, The Ohio State University, Columbus,
Ohio, United States of America
| | - Lianbo Yu
- Center for Biostatistics, The Ohio State University, Columbus, Ohio,
United States of America
| | - Parul Gulati
- Center for Biostatistics, The Ohio State University, Columbus, Ohio,
United States of America
| | - Jie Zhang
- Department of Biomedical Informatics, The Ohio State University,
Columbus, Ohio, United States of America
| | - Kun Huang
- Department of Biomedical Informatics, The Ohio State University,
Columbus, Ohio, United States of America
| | - Roberto Romero
- Perinatology Research Branch, Intramural Division, Eunice Kennedy Shriver
National Institute of Child Health and Human Development, National Institutes of
Health, Department of Health and Human Services, Bethesda, Maryland, United
States of America
- Hutzel Women's Hospital, Detroit, Michigan, United States of
America
| | - Douglas A. Kniss
- Division of Maternal-Fetal Medicine and Laboratory of Perinatal Research,
Department of Obstetrics and Gynecology, The Ohio State University, Columbus,
Ohio, United States of America
- Department of Biomedical Engineering, The Ohio State University,
Columbus, Ohio, United States of America
- * E-mail:
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Sharma A, Yu C, Leung C, Trane A, Lau M, Utokaparch S, Shaheen F, Sheibani N, Bernatchez P. A new role for the muscle repair protein dysferlin in endothelial cell adhesion and angiogenesis. Arterioscler Thromb Vasc Biol 2010; 30:2196-204. [PMID: 20724702 DOI: 10.1161/atvbaha.110.208108] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
OBJECTIVE Ferlins are known to regulate plasma membrane repair in muscle cells and are linked to muscular dystrophy and cardiomyopathy. Recently, using proteomic analysis of caveolae/lipid rafts, we reported that endothelial cells (EC) express myoferlin and that it regulates membrane expression of vascular endothelial growth factor receptor 2 (VEGFR-2). The goal of this study was to document the presence of other ferlins in EC. METHODS AND RESULTS EC expressed another ferlin, dysferlin, and that in contrast to myoferlin, it did not regulate VEGFR-2 expression levels or downstream signaling (nitric oxide and Erk1/2 phosphorylation). Instead, loss of dysferlin in subconfluent EC resulted in deficient adhesion followed by growth arrest, an effect not observed in confluent EC. In vivo, dysferlin was also detected in intact and diseased blood vessels of rodent and human origin, and angiogenic challenge of dysferlin-null mice resulted in impaired angiogenic response compared with control mice. Mechanistically, loss of dysferlin in cultured EC caused polyubiquitination and proteasomal degradation of platelet endothelial cellular adhesion molecule-1 (PECAM-1/CD31), an adhesion molecule essential for angiogenesis. In addition, adenovirus-mediated gene transfer of PECAM-1 rescued the abnormal adhesion of EC caused by dysferlin gene silencing. CONCLUSIONS Our data describe a novel pathway for PECAM-1 regulation and broaden the functional scope of ferlins in angiogenesis and specialized ferlin-selective protein cargo trafficking in vascular settings.
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Affiliation(s)
- Arpeeta Sharma
- Providence Heart and Lung Institute, St. Paul's Hospital, University of British Columbia, Vancouver V6Z 1Y6, British Columbia, Canada
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Albrecht DE, Garg N, Rufibach LE, Williams BA, Monnier N, Hwang E, Mittal P. 3rd Annual Dysferlin Conference 2-5 June 2009, Boston, Massachusetts, USA. Neuromuscul Disord 2009; 19:867-73. [PMID: 19781937 DOI: 10.1016/j.nmd.2009.08.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2009] [Indexed: 11/26/2022]
Affiliation(s)
- Douglas E Albrecht
- Jain Foundation Inc., 2310 130th Ave. NE, Suite B101, Bellevue, Washington 98005, USA
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