1
|
Moradi M, Zhandi M, Sharafi M, Akbari A, Atrabi MJ, Totonchi M. Gene expression profile of placentomes and clinical parameters in the cows with retained placenta. BMC Genomics 2022; 23:760. [PMID: 36411408 PMCID: PMC9677913 DOI: 10.1186/s12864-022-08989-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 11/04/2022] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Retained placenta (RP) is a prevalent disorder in cattle with many health-related and economic costs for the farm owners. Its etiology has not been clarified yet and there is no definite therapy for this disorder. In this study we conducted RNA-seq, hematologic and histologic experiments to survey the causes of RP development. METHODS Blood samples were collected from 4 RP and 3 healthy cows during periparturtion period for hematological assessments followed by placentome sampling within 30 min after parturition. Cows were grouped as RP and control in case the placenta was retained or otherwise expelled, respectively. Total RNA was extracted from placentome samples followed by RNA-sequencing. RESULTS We showed 240 differentially expressed genes (DEGs) between the RP and control groups. Enrichment analyzes indicated immune system and lipid metabolism as prominent over- and under-represented pathways in RP cows, respectively. Hormonal assessments showed that estradiol-17β (E2) was lower and cortisol tended to be higher in RP cows compared to controls at the day of parturition. Furthermore, histologic experiment showed that villi-crypt junctions remain tighter in RP cows compared to controls and the crypts layer seemed thicker in the placentome of RP cows. Complete blood cell (CBC) parameters were not significantly different between the two groups. CONCLUSION Overall, DEGs derived from expression profiling and these genes contributed to enrichment of immune and lipid metabolism pathways. We suggested that E2 could be involved in development of RP and the concentrations of P4 and CBC counts periparturition might not be a determining factor.
Collapse
Affiliation(s)
- Mehdi Moradi
- grid.46072.370000 0004 0612 7950Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
| | - Mahdi Zhandi
- grid.46072.370000 0004 0612 7950Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
| | - Mohsen Sharafi
- grid.412266.50000 0001 1781 3962Department of Animal Science, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran ,grid.419336.a0000 0004 0612 4397Department of Embryology, Reproduction Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACER, Tehran, Iran
| | - Arvand Akbari
- grid.417689.5Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Mohammad Jafari Atrabi
- grid.411984.10000 0001 0482 5331Institute of Pharmacology and Toxicology, University Medical Center, Georg August University, Göttingen, Germany
| | - Mehdi Totonchi
- grid.417689.5Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| |
Collapse
|
2
|
Balhara A, Kumar AR, Unadkat JD. Predicting Human Fetal Drug Exposure Through Maternal-Fetal PBPK Modeling and In Vitro or Ex Vivo Studies. J Clin Pharmacol 2022; 62 Suppl 1:S94-S114. [PMID: 36106781 PMCID: PMC9494623 DOI: 10.1002/jcph.2117] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Accepted: 06/20/2022] [Indexed: 11/06/2022]
Abstract
Medication (drug) use in human pregnancy is prevalent. Determining fetal safety and efficacy of drugs is logistically challenging. However, predicting (not measuring) fetal drug exposure (systemic and tissue) throughout pregnancy is possible through maternal-fetal physiologically based pharmacokinetic (PBPK) modeling and simulation. Such prediction can inform fetal drug safety and efficacy. Fetal drug exposure can be quantified in 2 complementary ways. First, the ratio of the steady-state unbound plasma concentration in the fetal plasma (or area under the plasma concentration-time curve) to the corresponding maternal plasma concentration (ie, Kp,uu ). Second, the maximum unbound peak (Cu,max,ss,f ) and trough (Cu,min,ss,f ) fetal steady-state plasma concentrations. We (and others) have developed a maternal-fetal PBPK model that can successfully predict maternal drug exposure. To predict fetal drug exposure, the model needs to be populated with drug specific parameters, of which transplacental clearances (active and/or passive) and placental/fetal metabolism of the drug are critical. Herein, we describe in vitro studies in cells/tissue fractions or the perfused human placenta that can be used to determine these drug-specific parameters. In addition, we provide examples whereby this approach has successfully predicted systemic fetal exposure to drugs that passively or actively cross the placenta. Apart from maternal-fetal PBPK models, animal studies also have the potential to estimate fetal drug exposure by allometric scaling. Whether such scaling will be successful is yet to be determined. Here, we review the above approaches to predict fetal drug exposure, outline gaps in our knowledge to make such predictions and map out future research directions that could fill these gaps.
Collapse
Affiliation(s)
- Ankit Balhara
- Department of Pharmaceutics, University of Washington, Seattle, Washington, USA
| | - Aditya R Kumar
- Department of Pharmaceutics, University of Washington, Seattle, Washington, USA
| | - Jashvant D Unadkat
- Department of Pharmaceutics, University of Washington, Seattle, Washington, USA
| |
Collapse
|
3
|
Arumugasaamy N, Rock KD, Kuo CY, Bale TL, Fisher JP. Microphysiological systems of the placental barrier. Adv Drug Deliv Rev 2020; 161-162:161-175. [PMID: 32858104 DOI: 10.1016/j.addr.2020.08.010] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 07/28/2020] [Accepted: 08/24/2020] [Indexed: 12/20/2022]
Abstract
Methods to evaluate maternal-fetal transport across the placental barrier have generally involved clinical observations after-the-fact, ex vivo perfused placenta studies, or in vitro Transwell assays. Given the ethical and technical limitations in these approaches, and the drive to understand fetal development through the lens of transport-induced injury, such as with the examples of thalidomide and Zika Virus, efforts to develop novel approaches to study these phenomena have expanded in recent years. Notably, within the past 10 years, placental barrier models have been developed using hydrogel, bioreactor, organ-on-a-chip, and bioprinting approaches. In this review, we discuss the biology of the placental barrier and endeavors to recapitulate this barrier in vitro using these approaches. We also provide analysis of current limitations to drug discovery in this context, and end with a future outlook.
Collapse
|
4
|
Li ZM, Benker B, Bao Q, Henkelmann B, Corsten C, Michalke B, Pauluschke-Fröhlich J, Flisikowski K, Schramm KW, De Angelis M. Placental distribution of endogenous and exogenous substances: A pilot study utilizing cryo-sampled specimen off delivery room. Placenta 2020; 100:45-53. [PMID: 32828006 DOI: 10.1016/j.placenta.2020.08.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 07/29/2020] [Accepted: 08/10/2020] [Indexed: 12/17/2022]
Abstract
INTRODUCTION Reliability in the use of placentome (including placenta, umbilical cord, and cord blood) biomarkers requires an understanding of their distributions. Here we aim to develop a simple and proper placenta sampling scheme, and to evaluate the placental distributions of biomarkers. METHODS We developed a continuous cooling chain protocol off delivery room and cryo-subsampling method for placenta sampling. The levels of thyroid hormones (THs), elements, persistent organic pollutants (POPs), monoamines, and vitamin E were measured using UPLC-Q-TOF-MS, HPLC-ICP-MS, HPLC-EcD, and HRGC-HRMS, respectively. The distributions of biomarkers were assessed. RESULTS In human placentome, l-thyroxine (T4), Cd, Se, Zn, Cu, Fe, Ca, K, Mg, α-tocopherol, β-tocopherol, and β-tocotrienol levels were higher in placenta than in umbilical cord, while Pb and Mn were concentrated in human cord. In porcine placentome, T4, 3,3',5'-triiodo-l-thyronine (rT3), 3,3'-diiodo-l-thyronine, Cd, Pb, Zn, K, and Al levels were higher in the cord. The intraclass correlation coefficient (ICC) was <0.4 for 3,3',5-triiodo-l-thyronine, rT3, α-tocopherol, and 7 elements in human basal plate, indicating low reliability. rT3, Cd, Zn, Mn, and Cu were significantly concentrated in the central region in human placenta, while higher levels of As, Cd, Cr, and Al were found in the periphery region in porcine placenta. Polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) showed moderate reliability (ICC: 0.40-0.98) except PCB-81, -126, and BDE-208, while polychlorinated dibenzo-p-doixins/furans (PCDD/Fs) showed poor reliability (ICC: 0.07-0.31). DISCUSSION These results highlight the complexity of placenta sampling. This study provides a novel and simple sampling approach in investigating placental exposomics.
Collapse
Affiliation(s)
- Zhong-Min Li
- Helmholtz Zentrum München-German Research Center for Environmental Health (GmbH), Molecular EXposomics, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany; School of Life Sciences Weihenstephan (Nutrition), Technische Universität München, 85354, Freising, Germany.
| | - Bärbel Benker
- Helmholtz Zentrum München-German Research Center for Environmental Health (GmbH), Research Unit Analytical BioGeoChemistry, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
| | - Qibei Bao
- Ningbo College of Health Sciences, 315100, Ningbo, Zhejiang, China
| | - Bernhard Henkelmann
- Helmholtz Zentrum München-German Research Center for Environmental Health (GmbH), Molecular EXposomics, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
| | - Claudia Corsten
- Helmholtz Zentrum München-German Research Center for Environmental Health (GmbH), Molecular EXposomics, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
| | - Bernhard Michalke
- Helmholtz Zentrum München-German Research Center for Environmental Health (GmbH), Research Unit Analytical BioGeoChemistry, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
| | - Jan Pauluschke-Fröhlich
- Department für Frauengesundheit Universitäts-Frauenklinik Tübingen, Calwerstr. 7, 70276, Tübingen, Germany
| | - Krzysztof Flisikowski
- Lehrstuhl für Biotechnologie der Nutztiere, Technische Universität München, Liesel-Beckmannstr. 1, 85354, Freising, Germany
| | - Karl-Werner Schramm
- Helmholtz Zentrum München-German Research Center for Environmental Health (GmbH), Molecular EXposomics, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany; Department für Biowissenschaftliche Grundlagen, Technische Universität München, Weihenstephaner Steig 23, 85350, Freising, Germany
| | - Meri De Angelis
- Helmholtz Zentrum München-German Research Center for Environmental Health (GmbH), Molecular EXposomics, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany.
| |
Collapse
|
5
|
Blanco-Castañeda R, Galaviz-Hernández C, Souto PCS, Lima VV, Giachini FR, Escudero C, Damiano AE, Barragán-Zúñiga LJ, Martínez-Aguilar G, Sosa-Macías M. The role of xenobiotic-metabolizing enzymes in the placenta: a growing research field. Expert Rev Clin Pharmacol 2020; 13:247-263. [PMID: 32129110 DOI: 10.1080/17512433.2020.1733412] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Introduction: The placenta is a temporary and unique organ that allows for the physical connection between a mother and fetus; this organ regulates the transport of gases and nutrients mediating the elimination of waste products contained in the fetal circulation. The placenta performs metabolic and excretion functions, on the basis of multiple enzymatic systems responsible for the oxidation, reduction, hydrolysis, and conjugation of xenobiotics. These mechanisms give the placenta a protective role that limits the fetal exposure to harmful compounds. During pregnancy, some diseases require uninterrupted treatment even if it is detrimental to the fetus. Drugs and other xenobiotics alter gene expression in the placenta with repercussions for the fetus and mother's well-being.Areas covered: This review provides a brief description of the human placental structure and function, the main drug and xenobiotic transporters and metabolizing enzymes, placenta-metabolized substrates, and alterations in gene expression that the exposure to xenobiotics may cause.Expert opinion: Research should be focused on the identification and validation of biological markers for the assessment of the harmful effects of some drugs in pregnancy, including the evaluation of polymorphisms and methylation patterns in chorionic villous samples and/or amniotic fluid.
Collapse
Affiliation(s)
| | | | - Paula C S Souto
- Laboratory of Vascular Biology, Institute of Health Sciences and Health, Universidad Federal De Mato Grosso, Barra Do Garcas, Brazil
| | - Victor Vitorino Lima
- Laboratory of Vascular Biology, Institute of Health Sciences and Health, Universidad Federal De Mato Grosso, Barra Do Garcas, Brazil
| | - Fernanda R Giachini
- Laboratory of Vascular Biology, Institute of Health Sciences and Health, Universidad Federal De Mato Grosso, Barra Do Garcas, Brazil
| | - Carlos Escudero
- Vascular Physiology Laboratory Group of Investigation in Tumor Angiogenesis (GIANT) Group of Research and Innovation in Vascular Health (GRIVAS Health) Basic Sciences Department Faculty of Sciences, Universidad Del Bio-Bio, Chillan, Chile
| | - Alicia E Damiano
- Laboratorio De Biología De La Reproducción, IFIBIO Houssay-UBA-CONICET, Buenos Aires, Argentina.,Departamento De Ciencias Biológicas, Facultad De Farmacia Y Bioquimica, Buenos Aires, UBA, Argentina
| | | | - Gerardo Martínez-Aguilar
- Unidad De Investigación Biomédica - Instituto Mexicano del Seguro Social (IMSS) Durango, Durango, México
| | - Martha Sosa-Macías
- Academia De Genómica, Instituto Politécnico Nacional-CIIDIR Durango, Durango, Mexico
| |
Collapse
|
6
|
Ellinger I, Jarukamjorn K, Chatuphonprasert W, Kitisripanya T, Putalun W. Pueraria candollei var. mirifica-Induced CYP1A1 and CYP1A2 expression in human choriocarcinoma bewo cells. Pharmacogn Mag 2020. [DOI: 10.4103/pm.pm_164_20] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
7
|
Transplacental transfer and metabolism of diuron in human placenta. Toxicol Lett 2018; 295:307-313. [PMID: 30010034 DOI: 10.1016/j.toxlet.2018.07.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 06/26/2018] [Accepted: 07/11/2018] [Indexed: 11/22/2022]
Abstract
Diuron is a broad-spectrum phenylurea derived herbicide which is commonly used across the globe. Diuron is toxic to the reproductive system of animals and carcinogenic to rat urothelium, and recently found to be genotoxic in human cells. In in vivo, it is metabolized predominately into 3-(3,4-dichlorophenyl)-1-methyl urea (DCPMU) in humans and 3-(3, 4-dichlorophenyl)urea (DCPU) in animals. Information on diuron toxicokinetics and related toxicity in human placenta is absent. We have investigated the toxicokinetics of diuron in ex vivo human placental perfusion and in in vitro human placental microsomes and human trophoblastic cancer cells (BeWo). Diuron crossed human placenta readily in placental perfusion. Furthermore, diuron was metabolized into DCPMU in perfused placenta and in in vitro incubations using microsomes from placentas of smokers. In incubations with placental microsomes from non-smokers, and in BeWo cells, metabolism to DCPMU was detected but only with the highest used diuron concentration (100 μM). Diuron metabolism was inhibited upon addition of α-naphthoflavone, a CYP1A1 inhibitor, underscoring the role of CYP1A1 in the metabolism. In conclusion, it is evident that diuron crosses human placenta and diuron can be metabolized in the placenta to a toxic metabolite via CYP1A1. This implicates in vivo fetal exposure to diuron if pregnant women are exposed to diuron, which may result in fetotoxicity.
Collapse
|
8
|
Kalashnikova I, Albekairi N, Ali S, Al Enazy S, Rytting E. Cell Culture Models for Drug Transport Studies. Drug Deliv 2016. [DOI: 10.1002/9781118833322.ch7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
|
9
|
Translocation of positively and negatively charged polystyrene nanoparticles in an in vitro placental model. Toxicol In Vitro 2015; 29:1701-10. [DOI: 10.1016/j.tiv.2015.07.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 06/30/2015] [Accepted: 07/02/2015] [Indexed: 01/20/2023]
|
10
|
Mathiesen L, Mørck TA, Zuri G, Andersen MH, Pehrson C, Frederiksen M, Mose T, Rytting E, Poulsen MS, Nielsen JKS, Knudsen LE. Modelling of human transplacental transport as performed in Copenhagen, Denmark. Basic Clin Pharmacol Toxicol 2014; 115:93-100. [PMID: 24646015 DOI: 10.1111/bcpt.12228] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 03/04/2014] [Indexed: 12/21/2022]
Abstract
Placenta perfusion models are very effective when studying the placental mechanisms in order to extrapolate to real-life situations. The models are most often used to investigate the transport of substances between mother and foetus, including the potential metabolism of these. We have studied the relationships between maternal and foetal exposures to various compounds including pollutants such as polychlorinated biphenyls, polybrominated flame retardants, nanoparticles as well as recombinant human antibodies. The compounds have been studied in the human placenta perfusion model and to some extent in vitro with an established human monolayer trophoblast cell culture model. Results from our studies distinguish placental transport of substances by physicochemical properties, adsorption to placental tissue, binding to transport and receptor proteins and metabolism. We have collected data from different classes of chemicals and nanoparticles for comparisons across chemical structures as well as different test systems. Our test systems are based on human material to bypass the extrapolation from animal data. By combining data from our two test systems, we are able to rank and compare the transport of different classes of substances according to their transport ability. Ultimately, human data including measurements in cord blood contribute to the study of placental transport.
Collapse
Affiliation(s)
- Line Mathiesen
- Section of Environmental Health, Department of Public Health, University of Copenhagen, Copenhagen, Denmark
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Le Vee M, Kolasa E, Jouan E, Collet N, Fardel O. Differentiation of human placental BeWo cells by the environmental contaminant benzo(a)pyrene. Chem Biol Interact 2014; 210:1-11. [DOI: 10.1016/j.cbi.2013.12.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Revised: 11/22/2013] [Accepted: 12/09/2013] [Indexed: 12/15/2022]
|
12
|
Stejskalova L, Rulcova A, Vrzal R, Dvorak Z, Pavek P. Dexamethasone accelerates degradation of aryl hydrocarbon receptor (AHR) and suppresses CYP1A1 induction in placental JEG-3 cell line. Toxicol Lett 2013; 223:183-91. [PMID: 24091107 DOI: 10.1016/j.toxlet.2013.09.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 09/20/2013] [Accepted: 09/22/2013] [Indexed: 01/16/2023]
Abstract
The JEG-3 choriocarcinoma cell line has been proposed as a model cell line of human placental trophoblast for induction studies via aryl hydrocarbon receptor (AHR). We examined whether glucocorticoid dexamethasone influences AHR-mediated induction of CYP1A1 enzyme in the JEG-3 cell line. We found that dexamethasone dose- and time-dependently suppresses CYP1A1 transactivation in gene reporter assays, CYP1A1 mRNA induction, and upregulation of 7-ethoxyresorufin-O-deethylase (EROD) activity by 3-methylcholanthrene (MC) and 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in JEG-3 cells. Co-transfection of JEG-3 cells with glucocorticoid receptor (GR) expression construct and treatment with dexamethasone abolished the effect of MC on CYP1A1 promoter construct in transient transfection gene reporter assays. RU486, a GR antagonist, suppressed the effect of dexamethasone on MC-induced transactivation of AHR responsive reporter constructs. We also found that dexamethasone stimulates both ligand-dependent and ligand-independent degradation of AHR but not of aryl hydrocarbon receptor nuclear translocator (ARNT) protein in JEG-3 cells. In experiments with proteasome inhibitors MG132 and bortezomib, we found that the degradation is not sensitive to proteasome inhibition in JEG-3. We can conclude that dexamethasone suppresses AHR-mediated CYP1A1 induction in JEG-3 cells through the unique mechanism of AHR-GR crosstalk, which involves accelerated degradation of AHR.
Collapse
Affiliation(s)
- Lucie Stejskalova
- Institute of Molecular and Translation Medicine, Faculty of Medicine and Dentistry, Palacky University in Olomouc, Hnevotiska 5, 779 00 Olomouc, Czech Republic; Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University in Prague, Heyrovskeho 1203, Hradec Kralove 500 05, Czech Republic
| | | | | | | | | |
Collapse
|
13
|
Pavek P, Smutny T. Nuclear receptors in regulation of biotransformation enzymes and drug transporters in the placental barrier. Drug Metab Rev 2013; 46:19-32. [PMID: 24020384 DOI: 10.3109/03602532.2013.835819] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Over the past 20 years, the toxicological and protective roles of the placental barrier with respect to drug detoxification and transporter-controlled protection of the fetus have been intensively examined. Several cytochrome P450 enzymes are expressed in placental trophoblast at different stages of pregnancy, though only a few of these have functional activity to metabolize xenobiotics. Drug transporters such as P-glycoprotein/MDR1 or breast cancer resistance protein (BCRP) are highly expressed in the placenta, and their functional activities have been demonstrated in the placenta both in vitro and in vivo. In addition, several studies have reported on ligand-activated transcription factors and nuclear receptors referred to as "xenosensors" in the placenta. The xenosensors control transcriptional regulation of both xenobiotic-metabolizing enzymes and drug transporters in different organs. Their ligands include toxic compounds and environmental pollutants, drugs, as well as herbal, dietary or vitamin supplements. Nevertheless, it remains debatable whether the placental barrier adapts to toxic injuries coming either from maternal medication or environmental contamination and whether the placenta contains a mechanism to respond dynamically in protecting the developing fetus. In the present paper, we summarize current knowledge about the activity and expression of major ligand-activated transcriptional mechanisms involved in biotransformation enzymes and transporters regulation in human placenta. In particular, we highlight the emerging roles of aryl hydrocarbon (AHR), vitamin D (VDR), glucocorticoid (GR) and pregnane X (PXR) receptors in that regulation. We show that the placenta constitute a unique metabolizing organ with significant overlap of exogenous and endogenous compounds metabolism controlled by nuclear receptors.
Collapse
Affiliation(s)
- Petr Pavek
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Centre for Drug Development, Charles University in Prague , Hradec Kralove , Czech Republic
| | | |
Collapse
|
14
|
Effects of glucocorticoids on cytochrome P450 1A1 (CYP1A1) expression in isolated human placental trophoblast. J Appl Biomed 2013. [DOI: 10.2478/v10136-012-0022-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
|
15
|
Assessment of an in vitro transport model using BeWo b30 cells to predict placental transfer of compounds. Arch Toxicol 2013; 87:1661-9. [DOI: 10.1007/s00204-013-1074-9] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Accepted: 05/06/2013] [Indexed: 10/26/2022]
|
16
|
Myllynen P, Vähäkangas K. Placental transfer and metabolism: an overview of the experimental models utilizing human placental tissue. Toxicol In Vitro 2012; 27:507-12. [PMID: 22960472 DOI: 10.1016/j.tiv.2012.08.027] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Revised: 08/21/2012] [Accepted: 08/22/2012] [Indexed: 11/16/2022]
Abstract
Over the decades several ex vivo and in vitro models which utilize delivered human placenta have been developed to study various placental functions. The use of models originating from human placenta to study transplacental transfer and related mechanisms is an attractive option because human placenta is relatively easily available for experimental studies. After delivery placenta has served its purpose and is usually disposed of. The purpose of this review is to give an overview of the use of human placental models for the studies on human placental transfer and related mechanisms such as transporter functions and xenobiotic metabolism. Human placental perfusion, the most commonly used continuous cell lines, primary cells and tissue culture, as well as subcellular fractions are briefly introduced and their major advantages and disadvantages are discussed.
Collapse
Affiliation(s)
- Päivi Myllynen
- Department of Pharmacology and Toxicology, Institute of Biomedicine, University of Oulu, Oulu, Finland
| | | |
Collapse
|
17
|
Nandekar PP, Sangamwar AT. Cytochrome P450 1A1-mediated anticancer drug discovery: in silico findings. Expert Opin Drug Discov 2012; 7:771-89. [PMID: 22716293 DOI: 10.1517/17460441.2012.698260] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
INTRODUCTION Target-specific drugs may offer fewer side/adverse effects in comparison with other anticancer agents and thus save normal healthy cells to a greater extent. The selective overexpression of cytochrome P450 1A1 (CYP1A1) in tumor cells induces the metabolism of benzothiazole and aminoflavone compounds to their reactive species, which are responsible for DNA adduct formation and cell death. This review encompasses the novelty of CYP1A1 as an anticancer drug target and explores the possible in silico strategies that would be applicable in the discovery and development of future antitumor compounds. AREAS COVERED This review highlights the various ligand-based and target-based in silico methodologies that were efficiently used in exploration of CYP1A1 as a novel antitumor target. These methodologies include electronic structure analysis, CoMFA studies, homology modeling, molecular docking, molecular dynamics analysis, pharmacophore mapping and quantitative structure activity relationship (QSAR) studies. It also focuses on the various approaches used in the development of the lysyl amide prodrug of 5F-203 (NSC710305) and dimethanesulfonate salt of 5-aminoflavone (NSC710464) as clinical candidates from their less potent analogues. EXPERT OPINION Selective overexpression of CYP1A1 in cancer cells offers tumor-specific drug design to ameliorate the current adverse effects associated with existing antitumor agents. Medicinal chemistry and in vitro driven approaches, in combination with knowledge-based drug design and by using the currently available tools of in silico methodologies, would certainly make it possible to design and develop novel anticancer compounds targeting CYP1A1.
Collapse
Affiliation(s)
- Prajwal P Nandekar
- National Institute of Pharmaceutical Education and Research (NIPER), Department of Pharmacoinformatics, S.A.S. Nagar (Mohali), Punjab-160062, India
| | | |
Collapse
|
18
|
Stejskalova L, Vecerova L, Peréz LM, Vrzal R, Dvorak Z, Nachtigal P, Pavek P. Aryl hydrocarbon receptor and aryl hydrocarbon nuclear translocator expression in human and rat placentas and transcription activity in human trophoblast cultures. Toxicol Sci 2011; 123:26-36. [PMID: 21666223 DOI: 10.1093/toxsci/kfr150] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Aryl hydrocarbon receptor (AHR) and its heterodimer aryl hydrocarbon nuclear translocator (ARNT) form a ligand-activated transcription complex that regulates expression of the AHR battery of target genes that includes the most important placental biotransformation enzyme cytochrome CYP1A1. Expression, placental localization, and ontogeny of AHR/Ahr and ARNT/Arnt have not been systematically studied in either human or rat placentas. Moreover, induction of such AHR target genes as CYP1A1, CYP1A2, CYP1B1, UGT1A1, and breast cancer resistance protein (BCRP), as well as of AHR, ARNT, and aryl hydrocarbon receptor repressor (AHRR) genes, after exposure to AHR ligands have not been studied in human placental trophoblast cultures. In this article, we show that only CYP1A1 messenger RNA (mRNA), but not CYP1A2, CYP1B1, UGT1A1, BCRP, AHR, ARNT, and AHRR mRNAs, is significantly induced in human term placental trophoblast cultures after exposure to prototype AHR ligands/activators 2,3,7,8-tetrachlorodibenzo-p-dioxin, 3-methylcholanthrene, omeprazole, and β-naphthoflavone. We localized AHR/Ahr and ARNT/Arnt in rat placental trophoblasts throughout gestation and in first trimester and term human placental trophoblast, which comprise the crucial component of the maternal-fetal barrier. We demonstrate that rat Ahr and Cyp1a1 reached highest expression during gestation days 15 and 18, which might indicate different response to Ahr ligands in placental Cyp1a1 induction during rat gestation. We also propose the JEG3 choriocarcinoma cell line as a cellular model for human trophoblast induction studies through AHR. In conclusion, we describe expression and ontogeny of AHR/Ahr and ARNT/Arnt and systematically characterize induction of major AHR target genes in human placental trophoblast forming the placental maternal-fetal morphological and metabolic barrier.
Collapse
Affiliation(s)
- Lucie Stejskalova
- Department of Pharmacology and Toxicology, Charles University in Prague, Hradec Kralove, Czech Republic
| | | | | | | | | | | | | |
Collapse
|
19
|
Prouillac C, Lecoeur S. The Role of the Placenta in Fetal Exposure to Xenobiotics: Importance of Membrane Transporters and Human Models for Transfer Studies. Drug Metab Dispos 2010; 38:1623-35. [DOI: 10.1124/dmd.110.033571] [Citation(s) in RCA: 143] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|
20
|
Toxicokinetics of the Food-toxin IQ in Human Placental Perfusion is not Affected by ABCG2 or Xenobiotic Metabolism. Placenta 2010; 31:641-8. [DOI: 10.1016/j.placenta.2010.05.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2010] [Revised: 04/15/2010] [Accepted: 05/06/2010] [Indexed: 01/05/2023]
|
21
|
Karttunen V, Myllynen P, Prochazka G, Pelkonen O, Segerbäck D, Vähäkangas K. Placental transfer and DNA binding of benzo(a)pyrene in human placental perfusion. Toxicol Lett 2010; 197:75-81. [PMID: 20466050 DOI: 10.1016/j.toxlet.2010.04.028] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2010] [Revised: 04/28/2010] [Accepted: 04/30/2010] [Indexed: 01/05/2023]
Abstract
Benzo(a)pyrene (BP) is the best studied polycyclic aromatic hydrocarbon, classified as carcinogenic to humans. The carcinogenic metabolite, benzo(a)pyrene-7,8-dihydrodiol-9,10-epoxide (BPDE), binds covalently to DNA. The key enzyme in this metabolic reaction is CYP1A1, which has also been found in placenta and human trophoblastic cells. By using human placental perfusion we confirmed that BP added to the maternal circulation in concentrations of 0.1 and 1 microM reaches fetal compartment but somewhat slower than the freely diffusible reference substance antipyrine. A well-known P-glycoprotein (ABCB1/P-gp) antagonist verapamil did not affect the transfer more than it did in the case of antipyrine, indicating that ABCB1/P-gp does not have a role in BP transfer. In one of the two placentas perfused for 6 h with the higher concentration of BP (1 microM) BPDE specific DNA adducts were found in placental tissue after the perfusion, but not before. The ability of human trophoblastic cells to activate BP to BPDE-DNA adducts was confirmed in human trophoblastic BeWo cells. This study shows that maternal exposure to BP leads to the exposure of the fetus to BP and/or its metabolites and that placenta itself can activate BP to DNA adducts.
Collapse
Affiliation(s)
- Vesa Karttunen
- Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | | | | | | | | | | |
Collapse
|
22
|
Poulsen MS, Rytting E, Mose T, Knudsen LE. Modeling placental transport: correlation of in vitro BeWo cell permeability and ex vivo human placental perfusion. Toxicol In Vitro 2009; 23:1380-6. [PMID: 19647068 DOI: 10.1016/j.tiv.2009.07.028] [Citation(s) in RCA: 100] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2009] [Revised: 07/24/2009] [Accepted: 07/24/2009] [Indexed: 12/25/2022]
Abstract
The placental passage of three compounds with different physicochemical properties was recently investigated in ex vivo human placental perfusion experiments (caffeine, benzoic acid, and glyphosate) [Mose, T., Kjaerstad, M.B., Mathiesen, L., Nielsen, J.B., Edelfors, S., Knudsen, L.E., 2008. Placental passage of benzoic acid, caffeine, and glyphosate in an ex vivo human perfusion system. J. Toxicol. Environ. Health, Part A 71, 984-991]. In this work, the transport of these same three compounds, plus the reference compound antipyrine, was investigated using BeWo (b30) cell monolayers. Transport across the BeWo cells was observed in the rank order of caffeine>antipyrine>benzoic acid>glyphosate in terms of both the apparent permeability coefficient and the initial slope, defined as the linear rate of substance transferred to the fetal compartment as percent per time, a parameter used to compare the two experimental models. The results from the in vitro studies were in excellent agreement with the ex vivo results (caffeine approximately antipyrine>benzoic acid>glyphosate). However the transfer rate was much slower in the BeWo cells compared to the perfusion system. The advantages and limitations of each model are discussed in order to assist in the preparation, prediction, and performance of future studies of maternal-fetal transfer.
Collapse
|
23
|
Myllynen P, Immonen E, Kummu M, Vähäkangas K. Developmental expression of drug metabolizing enzymes and transporter proteins in human placenta and fetal tissues. Expert Opin Drug Metab Toxicol 2009; 5:1483-99. [DOI: 10.1517/17425250903304049] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
24
|
Mitra P, Audus KL. Expression and functional activities of selected sulfotransferase isoforms in BeWo cells and primary cytotrophoblast cells. Biochem Pharmacol 2009; 78:1475-82. [PMID: 19646966 DOI: 10.1016/j.bcp.2009.07.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2009] [Revised: 07/22/2009] [Accepted: 07/22/2009] [Indexed: 12/11/2022]
Abstract
Several cytosolic sulfotransferase enzyme isoforms are functional in placenta but there is limited information available on the utility of cultured trophoblast cells for studying sulfation. The trophoblast cell layer constitutes the rate-determining barrier for trans-placental transfer. The objective of this work was to examine the mRNA expression and enzyme activities of four sulfotransferase isoforms reported to be functional in human placenta (SULT1A1, SULT1A3, SULT1E1, and SULT2A1) in primary cytotrophoblast cells and the trophoblast-like BeWo cell line. Reverse transcription polymerase chain reaction (RT-PCR) was performed to determine mRNA expression. Enzyme activities were assessed using the following substrates: 4-nitrophenol for SULT1A1, dopamine for SULT1A3, 17beta-estradiol for SULT1E1, and dehydroepiandrosterone for SULT2A1. For 4-nitrophenol and dopamine sulfation, apparent K(m) values, response to inhibitors (2,6-dichloro-4-nitrophenol and sodium chloride), and thermal stability profiles indicated that 4-nitrophenol and dopamine sulfation in BeWo cells were being mediated by SULT1A1 and SULT1A3, respectively. SULT1A1 and SULT1A3 were also functional in the cytotrophoblast cells. Both at the protein and at the mRNA levels, SULT1A1 was more abundant in BeWo cells in comparison to the primary cytotrophoblast cells. SULT1E1 and SULT2A1 mRNA were not detected in the cytotrophoblasts. SULT1E1 mRNA was weakly expressed in BeWo but there was negligible functional activity. Although SULT2A1 mRNA was abundantly expressed in BeWo, Western blot and enzyme activities revealed that the protein is not expressed in BeWo cells. The results suggest that the BeWo cells and the cytotrophoblast cells can be used to examine the roles of SULT1A1 and SULT1A3 in placental metabolism.
Collapse
Affiliation(s)
- Pallabi Mitra
- Department of Pharmaceutical Chemistry, School of Pharmacy, University of Kansas, Lawrence, KS 66047, USA
| | | |
Collapse
|
25
|
Androutsopoulos VP, Tsatsakis AM, Spandidos DA. Cytochrome P450 CYP1A1: wider roles in cancer progression and prevention. BMC Cancer 2009; 9:187. [PMID: 19531241 PMCID: PMC2703651 DOI: 10.1186/1471-2407-9-187] [Citation(s) in RCA: 291] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2009] [Accepted: 06/16/2009] [Indexed: 02/08/2023] Open
Abstract
CYP1A1 is one of the main cytochrome P450 enzymes, examined extensively for its capacity to activate compounds with carcinogenic properties. Continuous exposure to inhalation chemicals and environmental carcinogens is thought to increase the level of CYP1A1 expression in extrahepatic tissues, through the aryl hydrocarbon receptor (AhR). Although the latter has long been recognized as a ligand-induced transcription factor, which is responsible for the xenobiotic activating pathway of several phase I and phase II metabolizing enzymes, recent evidence suggests that the AhR is involved in various cell signaling pathways critical to cell cycle regulation and normal homeostasis. Disregulation of these pathways is implicated in tumor progression. In addition, it is becoming increasingly evident that CYP1A1 plays an important role in the detoxication of environmental carcinogens, as well as in the metabolic activation of dietary compounds with cancer preventative activity. Ultimately the contribution of CYP1A1 to cancer progression or prevention may depend on the balance of procarcinogen activation/detoxication and dietary natural product extrahepatic metabolism.
Collapse
Affiliation(s)
- Vasilis P Androutsopoulos
- Department of Medicine, Division of Forensic Sciences and Toxicology, University of Crete, Crete, Greece.
| | | | | |
Collapse
|
26
|
Myllynen P, Pasanen M, Pelkonen O. Human placenta: a human organ for developmental toxicology research and biomonitoring. Placenta 2005; 26:361-71. [PMID: 15850640 DOI: 10.1016/j.placenta.2004.09.006] [Citation(s) in RCA: 159] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/16/2004] [Indexed: 10/26/2022]
Abstract
Pregnant mothers are exposed to a wide variety of foreign chemicals. This exposure is most commonly due to maternal medication, lifestyle factors, such as smoking, drug abuse, and alcohol consumption, or occupational and environmental sources. Foreign compounds may interfere with placental functions at many levels e.g. signaling, production and release of hormones and enzymes, transport of nutrients and waste products, implantation, cellular growth and maturation, and finally, at the terminal phase of placental life, i.e. delivery. Placental responses may also be due to pharmaco-/toxicodynamic responses to foreign chemicals, e.g. hypoxia. On the other hand, placental xenobiotic-metabolizing enzymes can detoxify or activate foreign chemicals, and transporters either enhance or prevent cellular accumulation and transfer across the placenta. The understanding of what xenobiotics do to the placenta and what the placenta does to the xenobiotics should provide the basis for the use of placenta as a tool to investigate and predict some aspects of developmental toxicity. This review aims to give an update of the fate and behavior of xenobiotics in the placenta from the viewpoint of xenobiotic-metabolizing enzymes and transporters. Their response levels will be described according to gestational status and methods used. The effects of foreign chemicals on placental metabolizing enzymes will be discussed. Also, interactions in the transporter protein level will be covered. The role of the placenta in contributing to developmental effects and fetotoxicity will be examined. The toxicological effects of maternal medications, smoking, and environmental exposures (dioxins, pesticides) as well as some possibilities for biomonitoring will be highlighted.
Collapse
Affiliation(s)
- P Myllynen
- Department of Pharmacology and Toxicology, University of Oulu, PO Box 5000, FIN-90014 Oulu, Finland.
| | | | | |
Collapse
|
27
|
Drukteinis JS, Medrano T, Ablordeppey EA, Kitzman JM, Shiverick KT. Benzo[a]pyrene, but Not 2,3,7,8-TCDD, Induces G2/M Cell Cycle Arrest, p21CIP1 and p53 Phosphorylation in Human Choriocarcinoma JEG-3 Cells: A Distinct Signaling Pathway. Placenta 2005; 26 Suppl A:S87-95. [PMID: 15837074 DOI: 10.1016/j.placenta.2005.01.013] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/26/2005] [Indexed: 12/13/2022]
Abstract
Maternal cigarette smoking is known to disrupt placental growth and function. The polyaromatic hydrocarbon benzo[a]pyrene (BaP) is a major toxicant in cigarette smoke that has been shown to alter placental cell function. This study compared the effects of the benzo[a]pyrene (BaP) with 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), the prototype ligand for the aryl hydrocarbon (Ah) receptor, on proliferation and cell cycle progression in the human trophoblastic JEG-3 cell line. BaP, but not TCDD, significantly inhibited proliferation in a dose-dependent manner characterized by G2/M cell cycle phase arrest. No evidence of apoptosis was detected following BaP or TCDD exposure. Immunocytochemistry and Western blot analysis showed that BaP induced expression of nuclear p21CIP1 protein, the major inhibitor of cyclin-dependent kinases. In contrast, CDK1 expression, the main G2 cyclin-dependent kinase, was significantly reduced by 50% with a shift in localization from the nucleus to cytoplasm. Although BaP had no effect on total cellular p53 levels, phosphorylation of p53 at serine 15 (p53 ser-15phos) was markedly increased. The presence of Wortmannin, an inhibitor of PI-3 kinases, decreased BaP-induced p53 ser-15phos, as did the presence of the antioxidant vitamin E. In addition, vitamin E suppressed BaP-induced G2/M arrest without altering the level of induced CYP1A1 protein. Thus, the anti-proliferative effect of BaP involves activation of a p53-dependent pathway involving cell cycle arrest at G2/M, providing evidence of oxidative stress and activation of a DNA damage response pathway in JEG-3 cells.
Collapse
Affiliation(s)
- J S Drukteinis
- University of Florida, Department of Pharmacology and Therapeutics, 1600 SW Archer Road, P.O. Box 100267, Gainesville, FL 32610-0267, USA
| | | | | | | | | |
Collapse
|
28
|
Thadani PV, Strauss JF, Dey SK, Anderson VM, Audus KL, Coats KS, Cross JC, Erlebacher A, Ganapathy V, Linzer DI, Miller RK, Novak DA, Rapaka RS, Sadovsky Y, Salafia CM, Soares M, Unadkat J. National Institute on Drug Abuse Conference report on placental proteins, drug transport, and fetal development. Am J Obstet Gynecol 2004; 191:1858-62. [PMID: 15592265 DOI: 10.1016/j.ajog.2004.07.059] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The use of illicit and licit drugs during pregnancy is a major public health concern because of potential adverse effects on the fetus and the risk to maternal health. Because the placenta is the primary link between the mother and the conceptus and is essential for the growth and survival of the fetus, abnormalities in placental formation and function resulting from drug use could have a major influence on pregnancy outcome. At present, little information is available on the impact of abused drugs on placental biology alone or in combination with other "host" factors (eg, stress, infections). This prompted the National Institute on Drug Abuse (NIDA) to convene a meeting of experts in placental biology to review cutting-edge research with the mission to translate existing information to new clinical and research initiatives in the drug abuse field. This report summarizes the presentations and research recommendations resulting from the workshop discussions.
Collapse
Affiliation(s)
- Pushpa V Thadani
- Division of Neuroscience and Behavioral Research. National Institute on Drug Abuse (NIDA), National Institutes of Health, 6001 Executive Boulevard, Room 4282, MSC 9555, Bethesda, MD 20892-9555, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|