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2-Amino-3-Methylimidazo[4,5-f]quinoline Triggering Liver Damage by Inhibiting Autophagy and Inducing Endoplasmic Reticulum Stress in Zebrafish ( Danio rerio). Toxins (Basel) 2021; 13:toxins13110826. [PMID: 34822609 PMCID: PMC8620671 DOI: 10.3390/toxins13110826] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 11/19/2021] [Accepted: 11/20/2021] [Indexed: 12/16/2022] Open
Abstract
It is important to note that 2-Amino-3-methylimidazole[4,5-f]quinoline (IQ) is one of the most common heterocyclic amines (HCAs), which is a class of mutagenic/carcinogenic harmful compounds mainly found in high-protein thermal processed foods and contaminated environments. However, the pre-carcinogenic toxicity of IQ to the liver and its mechanism are poorly understood, further research is needed. In light of this, we exposed zebrafish to IQ (0, 8, 80, and 800 ng/mL) for 35 days, followed by comprehensive experimental studies. Histopathological and ultrastructural analysis showed that hepatocytes were damaged. TUNEL results showed that IQ induced apoptosis of liver cells, the expression of apoptosis factor gene was significantly increased, and the expression of Bcl-2 protein was significantly decreased. In addition, upregulated expression of the 78-kDa glucose-regulated protein (GRP78) and C/EBP homologous protein (CHOP) and endoplasmic reticulum stress (ERS)-related factors transcription levels were elevated obviously, suggesting that IQ induced ERS. Decreased protein expression of autophagy-related 5 (Atg5)-Atg12, Beclin1, and LC3-II, increased protein expression of p62, and autophagy-related factors transcription levels were significantly decreased, suggesting that IQ inhibited autophagy. Overall, our research showed that the potential harm of IQ to the liver before the occurrence of liver cancer was related to ERS and its mediated autophagy and apoptosis pathways.
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Li D, Li Z, Qiu C, Peng B, Zhang Y, Sun H, Wang S. 2-Amino-3-methylimidazo[4,5-f]quinoline induced oxidative stress and inflammation via TLR4/MAPK and TLR4/NF-κB signaling pathway in zebrafish (Danio rerio) livers. Food Chem Toxicol 2021; 157:112583. [PMID: 34563632 DOI: 10.1016/j.fct.2021.112583] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 09/05/2021] [Accepted: 09/22/2021] [Indexed: 12/13/2022]
Abstract
2-Amino-3-methylimidazole[4,5-f]quinoline (IQ) is a harmful substance, mainly existing in protein-abundant thermally processed foods and polluted environments. This study investigated the hepatotoxicity of IQ by exposing zebrafish model organisms at 0, 8, 80, and 800 ng/mL concentrations for 35 days and was supposed to reveal the mechanism of IQ-induced oxidative stress and inflammation in the liver. The results showed that, after IQ exposure, alanine aminotransferase (ALT), aspartate aminotransferase (AST), reactive oxygen species (ROS), and malondialdehyde (MDA) levels in zebrafish liver increased significantly; meanwhile, significantly increased tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), interleukin-6 (IL-6), and interleukin-12 (IL-12) levels induced severe oxidative stress and inflammation; however, glutathione (GSH), superoxide dismutase (SOD), catalase (CAT), glutathione s-transferase (GST) and glutathione peroxidase (GSH-Px) levels significantly decreased. The results indicated that the increased IQ exposure gradually aggravated pathological changes of zebrafish liver tissue (irregular cell morphology, cytoplasmic vacuolation, and inflammatory cell infiltration) and induced significant liver damage at last. Alterations in the expressions of genes and proteins involved in the IQ-induced TLR4/MAPK and TLR4/NF-κB pathways can elucidate the mechanism of its hepatotoxicity. The study provides evidence of IQ-induced hepatotoxicity and helps to draw attention to the health risks of dietary and environmental exposure to IQ.
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Affiliation(s)
- Dan Li
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, 300071, China
| | - Zhi Li
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, 300071, China
| | - Caiyi Qiu
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, 300071, China
| | - Bo Peng
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, 300071, China
| | - Yan Zhang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, 300071, China.
| | - Hongwen Sun
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China
| | - Shuo Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, 300071, China.
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Khan A, Siddiqui S, Husain SA, Mazurek S, Iqbal MA. Phytocompounds Targeting Metabolic Reprogramming in Cancer: An Assessment of Role, Mechanisms, Pathways, and Therapeutic Relevance. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:6897-6928. [PMID: 34133161 DOI: 10.1021/acs.jafc.1c01173] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The metabolism of cancer is remarkably different from that of normal cells and confers a variety of benefits, including the promotion of other cancer hallmarks. As the rewired metabolism is a near-universal property of cancer cells, efforts are underway to exploit metabolic vulnerabilities for therapeutic benefits. In the continued search for safer and effective ways of cancer treatment, structurally diverse plant-based compounds have gained substantial attention. Here, we present an extensive assessment of the role of phytocompounds in modulating cancer metabolism and attempt to make a case for the use of plant-based compounds in targeting metabolic vulnerabilities of cancer. We discuss the pharmacological interactions of phytocompounds with major metabolic pathways and evaluate the role of phytocompounds in the regulation of growth signaling and transcriptional programs involved in the metabolic transformation of cancer. Lastly, we examine the potential of these compounds in the clinical management of cancer along with limitations and challenges.
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Affiliation(s)
- Asifa Khan
- Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia (A Central University), New Delhi 110025, India
- Department of Biosciences, Faculty of Natural Sciences, Jamia Millia Islamia (A Central University), New Delhi 110025, India
| | - Shumaila Siddiqui
- Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia (A Central University), New Delhi 110025, India
| | - Syed Akhtar Husain
- Department of Biosciences, Faculty of Natural Sciences, Jamia Millia Islamia (A Central University), New Delhi 110025, India
| | - Sybille Mazurek
- Institute of Veterinary-Physiology and Biochemistry, University of Giessen, Giessen 35392, Germany
| | - Mohammad Askandar Iqbal
- Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia (A Central University), New Delhi 110025, India
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Zhao L, Pan F, Zhou N, Zhang H, Wang Y, Hao S, Wang C. Quantitative proteomics and bioinformatics analyses reveal the protective effects of cyanidin-3-O-glucoside and its metabolite protocatechuic acid against 2-amino-3-methylimidazo[4,5-f]quinoline (IQ)-induced cytotoxicity in HepG2 cells via apoptosis-related pathways. Food Chem Toxicol 2021; 153:112256. [PMID: 33974948 DOI: 10.1016/j.fct.2021.112256] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 04/01/2021] [Accepted: 05/05/2021] [Indexed: 12/29/2022]
Abstract
The aim of this study was to investigate the mechanism of action of cyanidin-3-O-glucoside (C3G) and its metabolite protocatechuic acid (PCA) mediated protection against 2-amino-3-methylimidazo[4,5-f]quinoline (IQ)-induced cytotoxicity in HepG2 cells. The effects of C3G and PCA on cell viability, LDH release and apoptosis in IQ-induced HepG2 cells were evaluated using CCK-8, LDH release and flow cytometry assays, respectively. TMT-based proteomics was utilized to characterize the proteins and pathways associated with the improvement after C3G and PCA treatment. Results showed that exposure to IQ significantly increased cytotoxicity and apoptosis in HepG2 cells, which were alleviated by C3G and PCA. C3G was more effective than PCA in protecting HepG2 cells against IQ-induced cytotoxicity and regulating the related signaling pathways. Proteomics and bioinformatics analyses and Western blot validation revealed that apoptosis-related signaling pathways played pivotal roles in protecting against the cytotoxicity of IQ by C3G, and XIAP was identified as the target protein. Molecular docking proved that C3G had strong binding affinity to XIAP and hindered the binding of IQ to the BIR3 domain of XIAP, resulting in the inhibition of apoptosis. Our findings suggested that C3G has potential as a preventive food ingredient to prevent carcinogenic risk of heterocyclic aromatic amines.
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Affiliation(s)
- Lei Zhao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, 100048, China.
| | - Fei Pan
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, 100048, China
| | - Na Zhou
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, 100048, China
| | - Huimin Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, 100048, China
| | - Yong Wang
- Academy of National Food and Strategic Reserves Administration, Beijing, 100037, China
| | - Shuai Hao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, 100048, China
| | - Chengtao Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, 100048, China.
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Mathiesen L, Buerki-Thurnherr T, Pastuschek J, Aengenheister L, Knudsen LE. Fetal exposure to environmental chemicals; insights from placental perfusion studies. Placenta 2021; 106:58-66. [DOI: 10.1016/j.placenta.2021.01.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 10/19/2020] [Accepted: 01/22/2021] [Indexed: 12/27/2022]
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Kummu M, Sieppi E, Koponen J, Laatio L, Vähäkangas K, Kiviranta H, Rautio A, Myllynen P. Organic anion transporter 4 (OAT 4) modifies placental transfer of perfluorinated alkyl acids PFOS and PFOA in human placental ex vivo perfusion system. Placenta 2015; 36:1185-91. [PMID: 26303760 DOI: 10.1016/j.placenta.2015.07.119] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 07/06/2015] [Accepted: 07/07/2015] [Indexed: 01/16/2023]
Abstract
INTRODUCTION Perfluorinated alkyl acids (PFAAs) are widely used in industry and consumer products. Pregnant women are exposed to PFAAs and their presence in umbilical cord blood represents fetal exposure. Interestingly, PFAAs are substrates for organic anion transporters (OAT) of which OAT4 is expressed in human placenta. METHODS To evaluate the contribution of OAT4 and ATP-binding cassette transporter G2 (ABCG2) proteins in the transplacental transfer of perfluoro octane sulfonate (PFOS) and perfluoro octanoate (PFOA) an ex vivo dual recirculating human placental perfusion was used. Altogether 8 placentas from healthy mothers with uncomplicated pregnancies were successfully perfused. RESULTS Both PFOS and PFOA crossed the placenta as suggested by in vivo data in the literature. The expression of OAT4 and ABCG2 proteins were studied by immunoblotting and correlation with the transfer index %(TI %) of PFOS and PFOA at 120 and 240 min (n = 4) was studied. The expression of OAT4 was in negative correlation with TI % of PFOA (R(2) = 0.92, p = 0.043) and PFOS (R(2) = 0.99, p = 0.007) at 120 min while at 240 min the correlation was statistically significant only with PFOA. The expression of ABCG2 did not correlate with TI% of PFOS or PFOA. DISCUSSION Data obtained in this study suggest the involvement of OAT4 in placental passage of PFAAs. Placental passage of PFOS and PFOA is modified by the transporter protein OAT4 but not by ABCG2. This is the first study indicating that OAT4 may decrease the fetal exposure to PFAAs and protect the fetus after maternal exposure to PFAAs but further studies are needed to confirm our findings.
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Affiliation(s)
- M Kummu
- Research Group of Biomedicine, Pharmacology and Toxicology, University of Oulu, Finland; Center for Arctic Medicine, Thule Institute, University of Oulu, Oulu, Finland
| | - E Sieppi
- Research Group of Biomedicine, Pharmacology and Toxicology, University of Oulu, Finland; Center for Arctic Medicine, Thule Institute, University of Oulu, Oulu, Finland
| | - J Koponen
- THL National Institute for Health and Welfare, Department of Environmental Health, Kuopio, Finland
| | - L Laatio
- Department of Gynecology and Obstetrics, Oulu University Hospital, Oulu, Finland
| | - K Vähäkangas
- Faculty of Health Sciences, School of Pharmacy/Toxicology, University of Eastern Finland, Kuopio, Finland
| | - H Kiviranta
- THL National Institute for Health and Welfare, Department of Environmental Health, Kuopio, Finland
| | - A Rautio
- Center for Arctic Medicine, Thule Institute, University of Oulu, Oulu, Finland
| | - P Myllynen
- Center for Arctic Medicine, Thule Institute, University of Oulu, Oulu, Finland; Nordlab Oulu, Oulu, Finland.
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Abstract
Consuming plants for their presumed health benefits has occurred since early civilizations. Phytochemicals are found in various plants that are frequently included in the human diet and are generally thought to be safe for consumption because they are produced naturally. However, this is not always the case and in fact many natural compounds found in several commonly consumed plants are potential carcinogens or tumor promoters and should be avoided.
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Affiliation(s)
- Ann M Bode
- The Hormel Institute, University of Minnesota, Austin, Minnesota
| | - Zigang Dong
- The Hormel Institute, University of Minnesota, Austin, Minnesota.
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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.
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Affiliation(s)
- Line Mathiesen
- Section of Environmental Health, Department of Public Health, University of Copenhagen, Copenhagen, Denmark
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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.
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Affiliation(s)
- Päivi Myllynen
- Department of Pharmacology and Toxicology, Institute of Biomedicine, University of Oulu, Oulu, Finland
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Mose T, Mathiesen L, Karttunen V, Nielsen J, Sieppi E, Kummu M, Mørck T, Myöhänen K, Partanen H, Vähäkangas K, Knudsen L, Myllynen P. Meta-analysis of data from human ex vivo placental perfusion studies on genotoxic and immunotoxic agents within the integrated European project NewGeneris. Placenta 2012; 33:433-9. [DOI: 10.1016/j.placenta.2012.02.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Revised: 02/03/2012] [Accepted: 02/04/2012] [Indexed: 10/28/2022]
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Walum E, Tähti H, Kolman A. The tenth anniversary of the Björn Ekwall memorial foundation. Altern Lab Anim 2011; 39:389-402. [PMID: 21942549 DOI: 10.1177/026119291103900413] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The Björn Ekwall Memorial Foundation (BEMF) was initiated by the Scandinavian Society for Cell Toxicology in 2001, to honour the memory of Dr Björn Ekwall (1940-2000) and to establish a prize, the Björn Ekwall Memorial Award. The prize is awarded to scientists who have significantly contributed to the field of cell toxicology, and whose work is contributing toward the replacement of animal experiments by alternative toxicity tests. Over the past 10 years, the Björn Ekwall Memorial Award has been presented annually. Björn Ekwall, an outstanding Swedish cell toxicologist, was one of the pioneers in the development and application of alternative methods to animal tests in toxicology. All his scientific work was devoted to in vitro toxicology, and in particular, to the use of cultured human cells for the screening of toxic chemicals. In the middle of the 1980s, he initiated the international Multicentre Evaluation of In Vitro Cytotoxicity (MEIC) project, to evaluate the usefulness of in vitro tests for the estimation of human acute systemic toxicity. To prove his "basal cytotoxicity concept", he established the MEMO database, in which data on the acutely toxic human blood concentrations of drugs and chemicals were collated from the literature and from clinical studies. He also initiated another project, Evaluation-Guided Development of In Vitro Toxicity and Toxicokinetic Tests (EDIT). The ideas from the EDIT project, together with those from the MEIC project, became the basis for today's international EU projects, e.g. ACuteTox, Sens-it-iv and ReProTect. In this article, 10 years after the start of the BEMF, the scientific achievements of each of the award winners in the field of in vitro toxicology are presented, together with a brief synopsis of their careers.
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Kirsi M, Kirsi V. Foetal Exposure to Food and Environmental Carcinogens in Human Beings. Basic Clin Pharmacol Toxicol 2011; 110:101-12. [DOI: 10.1111/j.1742-7843.2011.00761.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Myllynen P, Kummu M, Sieppi E. ABCB1 and ABCG2 expression in the placenta and fetus: an interspecies comparison. Expert Opin Drug Metab Toxicol 2010; 6:1385-98. [PMID: 20738225 DOI: 10.1517/17425255.2010.514264] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
IMPORTANCE OF THE FIELD ABCB1 and ABCG2 are efflux transporters which have a major impact on the pharmacological behavior of numerous drugs. They are expressed, for example, in the intestine, liver, kidney, BBB and placenta. It has become evident that ABCB1 and ABCG2 modify the pharmaco/toxicokinetics in the placenta and fetus and may consequently affect the outcome of pregnancy. AREAS COVERED IN THIS REVIEW Comprehensive literature searches were done using PubMed (until June 2010) to identify publications on ABCB1 and ABCG2 expression in placenta and fetal tissues in human, mouse, rat, guinea-pig and rabbit. WHAT THE READER WILL GAIN In this review, we aim to provide an overview of the current knowledge on the ABCB1 and ABCG2 transporter expression profiles in the placenta and fetal tissues in humans relative to other species. TAKE HOME MESSAGE The available information on ABCB1 and ABCG2 temporal expression profiles in placenta and fetus indicates rather good correlation among human, mouse and rat although some specific differences have been reported. However, at this point no detailed comparisons or comparative functional data are available. Detailed knowledge on the expression patterns and functional activity of ABCB1 and ABCG2 transporters placenta and developing embryo/fetus in different species could possibly help the interspecies extrapolation.
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Affiliation(s)
- Päivi Myllynen
- University of Oulu, Institute of Biomedicine, Department of Pharmacology and Toxicology, PO Box 5000, FIN-90014 Oulu, Finland.
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