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Chen D, Xu T, Li Y, Xu J, Peng B, Xu W, Wang X. Stress regulation of WFS1 and PERK-p-eIF2α-ATF4 signaling pathway in placental tissue cells of intrahepatic cholestasis of pregnancy. Placenta 2023; 139:1-11. [PMID: 37269649 DOI: 10.1016/j.placenta.2023.05.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 02/25/2023] [Accepted: 05/28/2023] [Indexed: 06/05/2023]
Abstract
INTRODUCTION The placental tissue stress of intrahepatic cholestasis of pregnancy (ICP) is activated by ERS under hypoxia condition. PERK signaling pathway is the key pathway for UPR regulation, and is first to activated during ERS. WFS1, as an important regulatory gene of UPR pathway, participates in ERS regulation. The purpose of our study is to explore the expression level and mutual regulation mechanisms of WFS1 and PERK-mediated UPR pathway in ICP placental tissue cell under stress. METHODS Blood and placenta samples were obtained from the ICP patients and ethinylestradiol (EE)-induced intrahepatic cholestasis pregnant rats. IHC and WB were used to detect the expression of WFS1, key factors of PERK pathway (GRP78, PERK, eIF2a, P-eIF2α, ATF4) and placental stress peptides (CRH, UCN). Furthermore, qPCR was carried out to detect mRNA expression of above indicators. RESULTS The expression levels of WFS1 and key factors of PERK pathway were significantly increased in severe ICP placental tissues. Moreover, qPCR and WB showed that relative mRNA and protein expression levels of WFS1 and key factors of PERK pathways in placenta tissues of severe ICP and EE-induced intrahepatic cholestasis pregnant rats were higher than those in control group to varying degrees, while CRH and UCN were descended. Meanwhile, after WFS1-siRNA targeted silencing of the WFS1 gene, the protein expression levels of PERK, P-eIF2α, ATF4 were significantly increased, while CRH and UCN protein were significantly decreased. DISCUSSION Our study revealed that the activation of WFS1 and PERK-p-eIF2α-ATF4 signaling pathway may contribute to stress regulation in placental tissue cells of intrahepatic cholestasis of pregnancy, thereby avoiding adverse pregnancy outcomes.
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Affiliation(s)
- Daijuan Chen
- Department of Obstetrics and Gynecology, Ministry of Education, West China Second University Hospital of Sichuan University/Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), No. 20, 3rd Section, South Renmin Road, Chengdu, 610041, Sichuan, China; Department of Obstetrics/Gynecology, Joint Laboratory of Reproductive Medicine (SCU-CUHK), Key Laboratory of Obstetric, Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, 610041, China
| | - Tingting Xu
- Department of Obstetrics and Gynecology, Ministry of Education, West China Second University Hospital of Sichuan University/Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), No. 20, 3rd Section, South Renmin Road, Chengdu, 610041, Sichuan, China
| | - Yaqian Li
- Department of Obstetrics and Gynecology, Ministry of Education, West China Second University Hospital of Sichuan University/Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), No. 20, 3rd Section, South Renmin Road, Chengdu, 610041, Sichuan, China; Department of Obstetrics/Gynecology, Joint Laboratory of Reproductive Medicine (SCU-CUHK), Key Laboratory of Obstetric, Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, 610041, China
| | - Jinfeng Xu
- Department of Obstetrics and Gynecology, Ministry of Education, West China Second University Hospital of Sichuan University/Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), No. 20, 3rd Section, South Renmin Road, Chengdu, 610041, Sichuan, China
| | - Bing Peng
- Department of Obstetrics and Gynecology, Ministry of Education, West China Second University Hospital of Sichuan University/Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), No. 20, 3rd Section, South Renmin Road, Chengdu, 610041, Sichuan, China
| | - Wenming Xu
- Department of Obstetrics/Gynecology, Joint Laboratory of Reproductive Medicine (SCU-CUHK), Key Laboratory of Obstetric, Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, 610041, China
| | - Xiaodong Wang
- Department of Obstetrics and Gynecology, Ministry of Education, West China Second University Hospital of Sichuan University/Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), No. 20, 3rd Section, South Renmin Road, Chengdu, 610041, Sichuan, China.
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Watt M, Mohammadzadeh P, Pinsinski E, Hollinshead FK, Bouma GJ. Corticotropin releasing hormone is present in the feline placenta and maternal serum. Front Endocrinol (Lausanne) 2023; 14:1132743. [PMID: 37124751 PMCID: PMC10140359 DOI: 10.3389/fendo.2023.1132743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 03/22/2023] [Indexed: 05/02/2023] Open
Abstract
Background In women, placental corticotropin releasing hormone (CRH) can be detected in maternal blood throughout pregnancy and is important in the regulation of the timing of parturition. However, its role in other mammalian species is unclear. In fact, very little is known about the presence and localization of CRH in placentas other than human. In this study we report for the first time the presence of CRH in feline placenta and maternal serum. Methods Presence of CRH mRNA and protein was assessed using RT-PCR and Western blot, respectively, in at term domestic cat placentas opportunistically obtained at a local animal shelter and spay clinic. In addition, CRH localization within the placenta was demonstrated via immunohistochemistry. Finally, presence of CRH in maternal blood from early (¾21 days) and mid (25-35 days) stages of pregnancy was investigated by ELISA. Results CRH mRNA and protein were detected in feline placentas, and localized to larger decidual cells and fetal trophoblast cells, including the binucleate cells. CRH was detectable in maternal blood collected from early-stage pregnancies, and amounts significantly increased in mid-gestation samples. Conclusion This is the first report on the presence and localization of CRH in the feline placenta, and its increase in maternal serum during the first half of pregnancy. These data lay the foundation for future studies to determine if CRH can be used as potential novel marker for early pregnancy diagnosis, determination, and monitoring in felids, and could greatly increase efficiency and success in zoo breeding programs utilizing artificial reproductive technologies for endangered feline species.
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Affiliation(s)
- Madison Watt
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO, United States
| | - Pardis Mohammadzadeh
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO, United States
| | - Emma Pinsinski
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO, United States
| | - Fiona K. Hollinshead
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO, United States
- *Correspondence: Fiona K. Hollinshead,
| | - Gerrit J. Bouma
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO, United States
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Enhancing Dissolution and Oral Bioavailability of Ursodeoxycholic Acid with a Spray-Dried pH-Modified Extended Release Formulation. Pharmaceutics 2022; 14:pharmaceutics14051037. [PMID: 35631622 PMCID: PMC9143058 DOI: 10.3390/pharmaceutics14051037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 04/24/2022] [Accepted: 05/09/2022] [Indexed: 11/24/2022] Open
Abstract
Ursodeoxycholate (UDCA) has low oral bioavailability and pH-dependent solubility and permeability. Thus, we developed a pH-modified extended-release formulation of UDCA using Na2CO3 as the alkalizing agent and hydroxypropyl methylcellulose (HPMC) as the release-modifying agent. The optimized pH-modified controlled-release UDCA formulation, with the UDCA:HPMC:Na2CO3 ratio of 200:600:150 (w/w/w), was prepared using a spray-drying method. Then, the formulation’s solubility, dissolution, and pharmacokinetic properties were characterized. In a pH-modified extended-release formulation of UDCA, the solubility of UDCA was increased to 8 mg/mL with a sustained dissolution for 12 h. Additionally, the spray-dried formulation exhibited amorphous states without molecular interaction among UDCA, Na2CO3, and HPMC. Moreover, the plasma UDCA concentration of the formulation maintained a higher UDCA concentration for up to 48 h than that of UDCA itself or the non-extended-release UDCA formulation. Consequently, the formulation significantly increased the AUC compared to UDCA or the non-extended-release UDCA formulation in rats. In conclusion, we have improved UDCA’s solubility and dissolution profile by preparing a pH-modified extended-release formulation with the UDCA:HPMC:Na2CO3 ratio of 200:600:150 (w/w/w), which effectively increased the oral bioavailability of UDCA by 251% in rats.
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Lai H, Liu X, Xin S, Zheng J, Liu H, Ouyang Y, Yang H, Zeng Y, Zou Y, Zeng X. Identification of two novel pathogenic variants of the NR1H4 gene in intrahepatic cholestasis of pregnancy patients. BMC Med Genomics 2022; 15:90. [PMID: 35436901 PMCID: PMC9017038 DOI: 10.1186/s12920-022-01240-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 04/12/2022] [Indexed: 12/18/2022] Open
Abstract
Background Intrahepatic cholestasis of pregnancy (ICP) can cause adverse pregnancy outcomes, such as spontaneous preterm delivery and stillbirth. It is a complex disease influenced by multiple factors, including genetics and the environment. Previous studies have reported that functioning nuclear receptor subfamily 1 group H member 4 (NR1H4) plays an essential role in bile acid (BA) homeostasis. However, some novel variants and their pathogenesis have not been fully elucidated. Therefore, this research aimed to investigate the genetic characteristics of the NR1H4 gene in ICP.
Methods In this study, we sequenced the entire coding region of NR1H4 in 197 pregnant women with ICP disease. SIFT and PolyPhen2 were used to predict protein changes. Protein structure modelling and comparisons between NR1H4 reference and modified protein structures were performed by SWISS-MODEL and Chimera 1.14rc, respectively. T-tests were used to analyse the potential significant differences between NR1H4 mutations and wild types for 29 clinical features. Fisher’s test was conducted to test the significance of differences in mutation frequencies between ICP and the three databases. Results We identified four mutations: two novel missense mutations, p.S145F and p.M185L; rs180957965 (A230S); and rs147030757 (N275N). The two novel missense mutations were absent in 1029 controls and three databases, including the 1000 Genomes Project (1000G_ALL), Exome Aggregation Consortium (ExAC) and ChinaMAP. Two web-available tools, SIFT and PolyPhen2, predicted that these mutations are harmful to the function of the protein. Moreover, compared to the wild-type protein structure, the NR1H4 p.S145F and p.M185L protein structure showed a slight change in the chemical bond in two zinc finger structures. Combined clinical data indicate that the mutation group had higher levels of total bile acid (TBA) than the wild-type group. Therefore, we hypothesized that these two mutations altered the protein structure of NR1H4, which impaired the function of NR1H4 itself and its target gene and caused an increase in TBA. Conclusions To our knowledge, this is the first study to identify the novel p.S145F and p.M185L mutations in 197 ICP patients. Our present study provides new insights into the genetic architecture of ICP involving the two novel NR1H4 mutations. Supplementary Information The online version contains supplementary material available at 10.1186/s12920-022-01240-w.
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Affiliation(s)
- Hua Lai
- Key Laboratory of Women's Reproductive Health of Jiangxi Province, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China.,Department of Obstetrics, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China
| | - Xianxian Liu
- Key Laboratory of Women's Reproductive Health of Jiangxi Province, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China.,Central Lab, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China
| | - Siming Xin
- Key Laboratory of Women's Reproductive Health of Jiangxi Province, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China.,Department of Obstetrics, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China
| | - Jiusheng Zheng
- Key Laboratory of Women's Reproductive Health of Jiangxi Province, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China.,Department of Obstetrics, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China
| | - Huai Liu
- Key Laboratory of Women's Reproductive Health of Jiangxi Province, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China.,Department of Obstetrics, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China
| | - Yu Ouyang
- Key Laboratory of Women's Reproductive Health of Jiangxi Province, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China.,Department of Obstetrics, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China
| | - Huoxiu Yang
- Key Laboratory of Women's Reproductive Health of Jiangxi Province, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China.,Department of Obstetrics, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China
| | - Yang Zeng
- Key Laboratory of Women's Reproductive Health of Jiangxi Province, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China.,Central Lab, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China
| | - Yang Zou
- Key Laboratory of Women's Reproductive Health of Jiangxi Province, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China. .,Central Lab, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China.
| | - Xiaoming Zeng
- Key Laboratory of Women's Reproductive Health of Jiangxi Province, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China. .,Department of Obstetrics, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, Jiangxi, China.
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Zu Y, Yang J, Zhang C, Liu D. The Pathological Mechanisms of Estrogen-Induced Cholestasis: Current Perspectives. Front Pharmacol 2021; 12:761255. [PMID: 34819862 PMCID: PMC8606790 DOI: 10.3389/fphar.2021.761255] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 10/26/2021] [Indexed: 12/31/2022] Open
Abstract
Estrogens are steroid hormones with a wide range of biological activities. The excess of estrogens can lead to decreased bile flow, toxic bile acid (BA) accumulation, subsequently causing intrahepatic cholestasis. Estrogen-induced cholestasis (EIC) may have increased incidence during pregnancy, and within women taking oral contraception and postmenopausal hormone replacement therapy, and result in liver injury, preterm birth, meconium-stained amniotic fluid, and intrauterine fetal death in pregnant women. The main pathogenic mechanisms of EIC may include deregulation of BA synthetic or metabolic enzymes, and BA transporters. In addition, impaired cell membrane fluidity, inflammatory responses and change of hepatocyte tight junctions are also involved in the pathogenesis of EIC. In this article, we review the role of estrogens in intrahepatic cholestasis, and outlined the mechanisms of EIC, providing a greater understanding of this disease.
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Affiliation(s)
- Yue Zu
- Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jinyu Yang
- Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chengliang Zhang
- Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Dong Liu
- Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Wang H, Sakata-Haga H, Masuta H, Tomosugi M, Tsukada T, Shimada H, Sakai D, Shoji H, Hatta T. Leukemia Inhibitory Factor Induces Proopiomelanocortin via CRH/CRHR Pathway in Mouse Trophoblast. Front Cell Dev Biol 2021; 9:618947. [PMID: 34350170 PMCID: PMC8326836 DOI: 10.3389/fcell.2021.618947] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 06/14/2021] [Indexed: 12/02/2022] Open
Abstract
We previously showed that maternal leukemia inhibitory factor (LIF) induces placental production of adrenocorticotropic hormone (ACTH), which stimulates fetal nucleated red blood cells to further secrete LIF and promote neurogenesis in rodent brains. However, the underlying mechanism of LIF-dependent ACTH induction remains unclear. Recently, we found that LIF induces corticotropin-releasing hormone (CRH) in mouse trophoblast stem cells. This finding supports the results of a previous study that CRH, which is produced by the placenta, induces placental ACTH production. In this study, we examined whether the effects of LIF are mediated by the induction of Pomc via CRH upregulation in mouse trophoblast. In vivo, protein levels of LIF and CRH peak in mouse placenta at 13.5 days post coitum. In mouse placenta, Crh mRNA and protein levels significantly increased 3 h after intraperitoneal injection of LIF (5 μg/kg body weight) into dams at 13.5 days post coitum. We also examined the effect of LIF-induced CRH on the expression of Pomc induced by LIF in mouse trophoblast stem cells in vitro. After LIF supplementation for 3 days, we found that the increased expression of Crh-induced by new supplementation of LIF was earlier than that of Pomc. Furthermore, LIF-induced upregulation of Pomc in mouse trophoblast stem cells was attenuated by inhibition of the CRH/CRHR1 pathway, whereas LIF-induced secretion of ACTH was attenuated by inhibition of the JAK/STAT3 pathway. Therefore, LIF indirectly increases placental Pomc expression through the CRH/CRHR1 pathway, and placental ACTH secretion is induced directly by LIF via the JAK/STAT3 pathway.
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Affiliation(s)
- He Wang
- Department of Anatomy, Kanazawa Medical University, Uchinada, Japan
- Department of Obstetrics, The First Hospital of China Medical University, Shenyang, China
| | | | - Hiroko Masuta
- Department of Anatomy, Kanazawa Medical University, Uchinada, Japan
| | | | - Tsuyoshi Tsukada
- Department of Anatomy, Kanazawa Medical University, Uchinada, Japan
| | - Hiroki Shimada
- Department of Medical Science, Kanazawa Medical University, Uchinada, Japan
| | - Daisuke Sakai
- Department of Biology, Kanazawa Medical University, Uchinada, Japan
| | - Hiroki Shoji
- Department of Biology, Kanazawa Medical University, Uchinada, Japan
| | - Toshihisa Hatta
- Department of Anatomy, Kanazawa Medical University, Uchinada, Japan
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Molecular Pathogenesis of Intrahepatic Cholestasis of Pregnancy. Can J Gastroenterol Hepatol 2021; 2021:6679322. [PMID: 34195157 PMCID: PMC8181114 DOI: 10.1155/2021/6679322] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Accepted: 05/22/2021] [Indexed: 12/12/2022] Open
Abstract
Intrahepatic cholestasis of pregnancy (ICP) is a pregnancy-specific liver disease. The maternal symptoms are characterized by skin pruritus and elevated bile acids, causing several adverse outcomes for fetuses, including an increased risk of preterm birth, meconium-stained amniotic fluid, neonatal depression, respiratory distress syndrome, and stillbirth. Genetic, hormonal, immunological, and environmental factors contribute to the pathogenesis of ICP, and the estrogen-bile acid axis is thought to play a dominant role. The advances in the past 10 years uncover more details of this axis. Moreover, dysregulation of extracellular matrix and oxygen supply, organelle dysfunction, and epigenetic changes are also found to cause ICP, illuminating more potential drug targets for interfering with. Here, we summarize the molecular pathogenesis of ICP with an emphasis on the advancement in the past 10 years, aiming to give an updated full view of this field.
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Wang H, Tsukada T, Shimada H, Sakata-Haga H, Iida Y, Zhang S, Shoji H, Hatta T. Leukemia inhibitory factor induces corticotropin-releasing hormone in mouse trophoblast stem cells. Biochem Biophys Res Commun 2019; 522:81-87. [PMID: 31740000 DOI: 10.1016/j.bbrc.2019.11.059] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 11/08/2019] [Indexed: 12/15/2022]
Abstract
Previous studies have shown that some inflammatory cytokines promote the expression of corticotropin-releasing hormone (CRH) in trophoblasts during pregnancy and that placental CRH could induce the production of adrenocorticotropic hormone (ACTH) in humans. However, whether the same is true in rodent placenta remains unclear. In this study, we examined the effect of pro-inflammatory cytokine LIF on the induction of CRH in mouse trophoblast stem cells (mTSCs). During differentiation, the CRH levels in mTSCs gradually increased. On days 3 and 5 after LIF supplementation, Crh expression in the differentiated mTSCs was significantly increased with LIF treatment than those without LIF treatment. Moreover, the CRH concentration in the culture media increased. Thereafter, we examined the contribution of the downstream pathways of LIF to CRH induction in differentiated mTSCs. The LIF-induced upregulation of CRH was attenuated by inhibition of PI3K/AKT and MAPK phosphorylation but not by inhibition of JAK/STAT3. Therefore, in mTSCs, LIF increased Crh expression through activation of the PI3K/AKT and MAPK pathways but not by the JAK/STAT3 pathway. The present study suggests that mTSC is an ideal in vitro model for studying regulation and function of placental CRH.
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Affiliation(s)
- He Wang
- Department of Anatomy, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan; Department of Obstetrics, The First Hospital of China Medical University, No. 155 Nanjing Bei Street, Heping District, Shenyang, Liaoning Province, 110001, China
| | - Tsuyoshi Tsukada
- Department of Anatomy, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan
| | - Hiroki Shimada
- Department of Medical Science, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan
| | - Hiromi Sakata-Haga
- Department of Anatomy, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan
| | - Yasuo Iida
- Department of Mathematics, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan
| | - Shitai Zhang
- Department of Obstetrics and Gynecology, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan
| | - Hiroki Shoji
- Department of Biology, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan
| | - Toshihisa Hatta
- Department of Anatomy, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan.
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Ursodeoxycholate Restores Biliary Excretion of Methotrexate in Rats with Ethinyl Estradiol Induced-Cholestasis by Restoring Canalicular Mrp2 Expression. Int J Mol Sci 2018; 19:ijms19041120. [PMID: 29642532 PMCID: PMC5979538 DOI: 10.3390/ijms19041120] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 03/29/2018] [Accepted: 04/08/2018] [Indexed: 12/12/2022] Open
Abstract
The in vivo relevance of ursodeoxycholate (UDCA) treatment (100 mg/kg/day, per oral tid for 5 days before cholestasis induction followed by the same dosing for 5 days) on hepatic function was investigated in rats with 17α-ethinylestradiol (EE, 10 mg/kg, subcutaneous for 5 days)-induced experimental cholestasis. The bile flow rate and the expression level of hepatic multidrug resistance-associated protein 2 (Mrp 2) that were decreased in cholestasis were restored after UDCA treatment. Consistent with this, the biliary excretion clearance (CLexc,bile) of a representative Mrp2 substrate—methotrexate (MTX)—was decreased in cholestatic rats but was restored after UDCA treatment. Consequently, the plasma concentrations of MTX, which were increased by cholestasis, were decreased to control levels by UDCA treatment. Thus, the restoration of CLexc,bile appears to be associated with the increase in Mrp2 expression on the canalicular membrane by UDCA treatment followed by Mrp2-mediated biliary excretion of MTX. On the other hand, the hepatic uptake clearance (CLup,liver) of MTX was unchanged by cholestasis or UDCA treatment, suggestive of the absence of any association between the uptake process and the overall biliary excretion of MTX. Since UDCA has been known to induce the expression of canalicular MRP2 in humans, UDCA treatment might be effective in humans to maintain or accelerate the hepatobiliary elimination of xenobiotics or metabolic conjugates that are MRP2 substrates.
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