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Wang YN, Ye YX, Guo ZW, Xiong ZL, Sun QS, Zhou D, Jiang SW, Chen H. Inducible knockout of syncytin-a leads to poor placental glucose transport in mice. Placenta 2022; 121:155-163. [PMID: 35349915 DOI: 10.1016/j.placenta.2022.03.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 03/11/2022] [Accepted: 03/14/2022] [Indexed: 02/05/2023]
Abstract
INTRODUCTION Cell-cell fusion of cytotrophoblasts into the syncytiotrophoblast layer is a key process in placental development. Syncytin, an endogenous retroviral envelope protein, is expressed in placental trophoblasts and specifically mediates syncytiotrophoblast layer formation. Syncytin deficiency has been observed in fetal growth-restricted placentas. Abnormal fetal growth, especially fetal growth restriction, is associated with the decreased expression of glucose transporters. Here, we aimed to determine the role of syncytin in fetal growth restriction in placental glucose transport capacity. METHODS To better explore the function of syncytin in fetal growth-restricted placenta, we generated an inducible knockout mouse model of syncytin-a gene. The expression levels of glucose transporters in BeWo cells were measured before and after HERV-W knockdown. RESULTS Syncytin-A disruption was associated with significant abnormalities in placental and fetal development in mice. Syncytin-A destruction causes extensive abnormalities in the maternal-fetal exchange structures in the labyrinth, including an extremely reduced number and dramatically irregular distribution of fetal vessels. Moreover, glucose transporter 1, glucose transporters 3, and connexin 26 expression levels decreased after E14.5. Consistently, low glucose transporter 1, glucose transporter 3, and connexin 26 levels were observed in HERV-W-silenced BeWo cells. DISCUSSION Syncytin-A is crucial for both syncytiotrophoblast layer development and morphogenesis, suggesting that syncytin-A disruption leads to fetal growth restriction associated with abnormalities in the maternal-fetal exchange barrier and decreased glucose transport.
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Affiliation(s)
- Ya-Nan Wang
- Department of Histology and Embryology, Shantou University Medical College, China; Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Shantou University Medical College, China
| | - Yi-Xin Ye
- Department of Histology and Embryology, Shantou University Medical College, China
| | - Ze-Wen Guo
- Department of Obstetrics and Gynecology, Shantou Central Hospital, China
| | - Zhe-Lei Xiong
- Department of Histology and Embryology, Shantou University Medical College, China
| | - Qi-Si Sun
- Department of Histology and Embryology, Shantou University Medical College, China
| | - Da Zhou
- Department of Histology and Embryology, Shantou University Medical College, China
| | - Shi-Wen Jiang
- Center of Reproductive Medicine, The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University, Wuxi, 214123, Jiangsu, China
| | - Haibin Chen
- Department of Histology and Embryology, Shantou University Medical College, China.
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Garces MF, Rodriguez - Navarro HA, Buell - Acosta JD, Burgos - Cardenas AJ, Franco - Vega R, Maldonado - Acosta LM, Eslava - Schmalbach J, Parada - Baños AJ, Castro - Pinzon A, Sanchez E, Angel - Muller E, Lacunza E, Castaño JP, Dieguez C, Nogueiras R, Ruiz - Parra AI, Caminos JE. Maternal Serum Angiopoietin-Like 3 Levels in Healthy and Mild Preeclamptic Pregnant Women. Front Endocrinol (Lausanne) 2021; 12:670357. [PMID: 33927698 PMCID: PMC8077029 DOI: 10.3389/fendo.2021.670357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Accepted: 03/23/2021] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE Angiopoietin-like protein 3(ANGPTL3) is an important regulator of lipoprotein metabolism in the fed state by inhibiting the enzyme lipoprotein lipase in oxidative tissues. However, the possible role of ANGPTL3 throughout gestation and its relationship with hormonal and biochemical variables are still unknown. The aim of this study was to determinate serum ANGPTL3 level in healthy non-pregnant women, during healthy and preeclamptic pregnancy and postpartum. METHODS Serum ANGPTL3 was analyzed by enzyme-linked immunosorbent assay (ELISA), in a prospective cohort of healthy pregnant women (n = 52) and women with mild preeclampsia (n = 21), and women at three months postpartum (n = 20) and healthy non-pregnant women (n = 20). The results obtained were correlated with biochemical, hormonal and anthropometric variables and insulin resistance indices. RESULTS Levels of ANGPTL3 were not different between the follicular and the luteal phases of the cycle in healthy non-pregnant women. There was a significant reduction in serum ANGPTL3 levels from the first to the third trimester in healthy pregnant women compared with healthy non-pregnant and postpartum women (p <0.01). ANGPTL3 levels do not differ significantly during the three trimesters of pregnancy neither in healthy women nor in preeclamptic women. The serum levels of ANGPTL3 in women who developed preeclampsia are not statistically different from those observed in healthy pregnant women in each trimester of pregnancy. A significant lineal positive correlation was observed between serum ANGPTL3 levels and triglyceride (P =0.0186, r =0.52), very low-density lipoprotein cholesterol (P =0.0224, r =0.50), and total cholesterol levels (P =0.0220, r =0.50) in healthy non-pregnant women (P 0.05). Besides, there were no significant correlations between serum ANGPTL3 and body mass index (BMI), high-density lipoprotein cholesterol, glucose, insulin, leptin, or HOMA-IR (P >0.05). CONCLUSIONS We describe for the first time the profile of ANGPTL3 throughout pregnancy and postpartum as well as and discussed about explore their potential contribution interactions with lipoprotein metabolism throughout pregnancy and postpartum. Thus, low levels of ANGPTL3 during pregnancy might favor lipid uptake in oxidative tissues as the main maternal energy source, while may helping to preserve glucose for use by the fetus and placenta.
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Affiliation(s)
| | | | | | | | - Roberto Franco - Vega
- Department of Internal Medicine Endocrine Unit, Universidad Nacional de Colombia, Bogota, Colombia
| | | | | | | | - Andres Castro - Pinzon
- Department of Internal Medicine Endocrine Unit, Universidad Nacional de Colombia, Bogota, Colombia
| | - Elizabeth Sanchez
- Department of Physiology, Universidad Nacional de Colombia, Bogota, Colombia
| | - Edith Angel - Muller
- Department of Obstetrics and Gynecology, Universidad Nacional de Colombia, Bogota, Colombia
| | - Ezequiel Lacunza
- Centro de Investigaciones Inmunológicas Básicas y Aplicadas (CINIBA), Facultad de Ciencias Médicas, Universidad Nacional de La Plata, La Plata, Argentina
| | - Justo P. Castaño
- Maimonides Institute of Biomedical Research of Cordoba, Department of Cell Biology, University of Córdoba, Córdoba, Spain
| | - Carlos Dieguez
- CIBER Physiopathology of Obesity and Nutrition (CIBERobn), Instituto de Investigaciones Sanitarias (IDIS), Department of Physiology (CIMUS), Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - Rubén Nogueiras
- CIBER Physiopathology of Obesity and Nutrition (CIBERobn), Instituto de Investigaciones Sanitarias (IDIS), Department of Physiology (CIMUS), Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | | | - Jorge Eduardo Caminos
- Department of Physiology, Universidad Nacional de Colombia, Bogota, Colombia
- *Correspondence: Jorge Eduardo Caminos,
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