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Cañas D, Herrera EA, García-Herrera C, Celentano D, Krause BJ. Fetal Growth Restriction Induces Heterogeneous Effects on Vascular Biomechanical and Functional Properties in Guinea Pigs ( Cavia porcellus). Front Physiol 2017; 8:144. [PMID: 28344561 PMCID: PMC5344887 DOI: 10.3389/fphys.2017.00144] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 02/23/2017] [Indexed: 01/09/2023] Open
Abstract
Aim: Fetal growth restriction (FGR) is associated with a variety of cardiometabolic diseases in adulthood which could involve remodeling processes of the vascular walls that could start in the fetal period. However, there is no consensus whether this remodeling affects in a similar way the whole vascular system. We aimed to determine the effects of FGR on the vasoactive and biomechanical properties of umbilical and systemic vessels in fetal guinea pigs. Methods: FGR was induced by implanting ameroid occluders at mid-gestation in uterine arteries of pregnant guinea pigs, whilst the control group was exposed to simulated surgery. At the term of gestation, systemic arteries (aorta, carotid and femoral) and umbilical vessels were isolated to determine ex vivo contractile and biomechanical responses (stretch-stress until rupture) on a wire myograph, as well as opening angle and residual stresses. Histological characteristics in tissue samples were measured by van Gieson staining. Results: Aorta and femoral arteries from FGR showed an increased in biomechanical markers of stiffness (p < 0.01), contractile capacity (p < 0.05) and relative media thickness (p < 0.01), but a reduced internal diameter (p < 0.001), compared with controls. There were no differences in the biomechanical properties of carotid and umbilical from control and FGR fetuses, but FGR umbilical arteries had a decreased contractile response to KCl (p < 0.05) along with a reduced relative media thickness (p < 0.05). Conclusion: Altogether, these changes in functional, mechanical and morphological properties suggest that FGR is associated with a heterogeneous pro-constrictive vascular remodeling affecting mainly the lower body fetal arteries. These effects would be set during a pathologic pregnancy in order to sustain the fetal blood redistribution in the FGR and may persist up to adulthood increasing the risk of a cardiovascular disease.
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Affiliation(s)
- Daniel Cañas
- Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Santiago de Chile Santiago, Chile
| | - Emilio A Herrera
- Programa de Fisiopatología, Facultad de Medicina, Instituto de Ciencias Biomédicas, Universidad de ChileSantiago, Chile; International Center for Andean Studies, Universidad de ChilePutre, Chile
| | - Claudio García-Herrera
- Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Santiago de Chile Santiago, Chile
| | - Diego Celentano
- Departamento de Ingeniería Mecánica y Metalúrgica, Instituto de Ingeniería Biológica y Médica, Pontificia Universidad Católica de Chile Santiago, Chile
| | - Bernardo J Krause
- Division of Pediatrics, Departament of Neonatology, Faculty of Medicine, Pontificia Universidad Católica de Chile Santiago, Chile
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Hou L, Zhang J, Zhang C, Xu Y, Zhu X, Yao C, Liu Y, Li T, Cao J. The injury of fine particulate matter from cooking oil fumes on umbilical cord blood vessels in vitro. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2017; 49:65-73. [PMID: 27918956 DOI: 10.1016/j.etap.2016.11.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 11/16/2016] [Accepted: 11/20/2016] [Indexed: 06/06/2023]
Abstract
Cooking oil fumes (COFs) derived PM2.5 is the major source of indoor air pollution in Asia. For this, a pregnant rat model within different doses of cooking oil fumes (COFs) derived PM2.5 was established in pregnancy in our research. Our previous studies have showed that exposure to COFs-derived PM2.5 was related to adverse pregnancy outcomes. However, the mechanisms of signaling pathways remain unknown. Therefore, this study aimed to investigate the underlying mechanisms induced by COFs-derived PM2.5 injury on umbilical cord blood vessels (UCs) in vitro. Exposure to COFs-derived PM2.5 resulted in changing the expression of eNOS, ET-1, ETRA, and ETRB. In additions, western blot analysis indicated that the HIF-1α/iNOS/NO signaling pathway and VEGF/VEGFR1/iNOS signaling pathway were involved in UCs injury triggered by COFs-derived PM2.5. In conclusion, our data suggested that exposure to COFs-derived PM2.5 resulted in increasing of oxidative stress and inflammation, as well as dysfunction of UCs.
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Affiliation(s)
- Lijuan Hou
- Department of Occupational and Environmental, School of Public Health, Anhui Medical University, Meishan Road, Hefei, Anhui, China
| | - Jian Zhang
- Department of Occupational and Environmental, School of Public Health, Anhui Medical University, Meishan Road, Hefei, Anhui, China
| | - Chao Zhang
- Department of Occupational and Environmental, School of Public Health, Anhui Medical University, Meishan Road, Hefei, Anhui, China
| | - Yachun Xu
- Department of Occupational and Environmental, School of Public Health, Anhui Medical University, Meishan Road, Hefei, Anhui, China
| | - Xiaoxia Zhu
- Department of Occupational and Environmental, School of Public Health, Anhui Medical University, Meishan Road, Hefei, Anhui, China
| | - Cijiang Yao
- Department of Occupational and Environmental, School of Public Health, Anhui Medical University, Meishan Road, Hefei, Anhui, China
| | - Ying Liu
- Department of Occupational and Environmental, School of Public Health, Anhui Medical University, Meishan Road, Hefei, Anhui, China
| | - Tao Li
- Department of Occupational and Environmental, School of Public Health, Anhui Medical University, Meishan Road, Hefei, Anhui, China
| | - Jiyu Cao
- The Teaching Center for Preventive Medicine, School of Public Health, Anhui Medical University, Meishan Road 81, Anhui Province, Postal Code 230032, Hefei, Anhui, China.
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Zhu X, Hou L, Zhang J, Yao C, Liu Y, Zhang C, Xu Y, Cao J. The structural and functional effects of fine particulate matter from cooking oil fumes on rat umbilical cord blood vessels. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:16567-16578. [PMID: 27178289 DOI: 10.1007/s11356-016-6821-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Accepted: 05/02/2016] [Indexed: 06/05/2023]
Abstract
A growing body of epidemiological evidence has supported the association between maternal exposure to airborne fine particulate matter (PM2.5) during pregnancy and adverse pregnancy outcomes. However, the specific biological mechanisms implicated in the causes of adverse pregnancy outcomes are not well defined. In this study, a pregnant rat model of exposure to different doses of cooking oil fumes (COFs)-derived PM2.5 by tail intravenous injection in different pregnant stages was established. The results indicated that exposure to COFs-derived PM2.5 was associated with adverse pregnancy outcomes, changed the structure of umbilical cord blood vessels, decreased the diameter and lumen area, and increased wall thickness. What's more, a significant increase of maximum contraction tension was observed in the early pregnancy high-dose exposure group and pregnant low-dose exposure group compared to the control group. Based on the maximum contraction tension, acetylcholine (ACh) did not induce vasodilation but caused a dose-dependent constriction, and there were significant differences in the two groups compared to the control group. Exposure to COFs-derived PM2.5 impaired the vasomotor function of umbilical veins by affecting the expression of NO and ET-1. This is the first study that evaluated the association of risk of adverse pregnancy outcomes and pregnant rats exposed to COFs-derived PM2.5 and primarily explored the potential mechanisms of umbilical cord blood vessels injury on a rat model. More detailed vitro and vivo studies are needed to further explore the mechanism in the future.
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Affiliation(s)
- Xiaoxia Zhu
- Department of Occupational and Environmental, School of Public Health, Anhui Medical University, Meishan Road, Hefei, Anhui, China
| | - Lijuan Hou
- Department of Occupational and Environmental, School of Public Health, Anhui Medical University, Meishan Road, Hefei, Anhui, China
| | - Jian Zhang
- Department of Occupational and Environmental, School of Public Health, Anhui Medical University, Meishan Road, Hefei, Anhui, China
| | - Cijiang Yao
- Department of Occupational and Environmental, School of Public Health, Anhui Medical University, Meishan Road, Hefei, Anhui, China
| | - Ying Liu
- Department of Occupational and Environmental, School of Public Health, Anhui Medical University, Meishan Road, Hefei, Anhui, China
| | - Chao Zhang
- Department of Occupational and Environmental, School of Public Health, Anhui Medical University, Meishan Road, Hefei, Anhui, China
| | - Yachun Xu
- Department of Occupational and Environmental, School of Public Health, Anhui Medical University, Meishan Road, Hefei, Anhui, China
| | - Jiyu Cao
- The Teaching Center for Preventive Medicine, School of Public Health, Anhui Medical University, Meishan Road 81, Hefei, 230032, Anhui, China.
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The effects of particulate ambient air pollution on the murine umbilical cord and its vessels: A quantitative morphological and immunohistochemical study. Reprod Toxicol 2012; 34:598-606. [DOI: 10.1016/j.reprotox.2012.08.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2011] [Revised: 08/14/2012] [Accepted: 08/20/2012] [Indexed: 02/03/2023]
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Krause BJ, Carrasco-Wong I, Caniuguir A, Carvajal J, Farías M, Casanello P. Endothelial eNOS/arginase imbalance contributes to vascular dysfunction in IUGR umbilical and placental vessels. Placenta 2012; 34:20-8. [PMID: 23122700 DOI: 10.1016/j.placenta.2012.09.015] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2012] [Revised: 09/10/2012] [Accepted: 09/21/2012] [Indexed: 11/28/2022]
Abstract
Placental vascular tone is critically influenced by nitric oxide (NO) derived from endothelial NO synthase (eNOS) activity. Placental vessels from pregnancies complicated with intrauterine growth restriction present altered NOS-dependent vasodilation. Arginase-2 competes with eNOS for l-arginine and counteracts the NOS-dependent relaxation in umbilical vessels from normal pregnancies. However there is no data regarding the contribution of arginase activity on the impaired endothelial function in IUGR placenta. We studied whether arginase-2 participates in IUGR-related placental vascular dysfunction counteracting eNOS-dependent relaxation, and the regulation of arginase-2 and eNOS expression in endothelial cells from IUGR umbilical arteries (HUAEC) and veins (HUVEC). In IUGR-derived umbilical arteries (UA) and veins (UV), and chorionic arteries (CA), NOS-dependent vasoactive response in the presence and absence of BEC (arginase inhibitor) was studied. Protein levels of eNOS (total and Ser(1177)-P-eNOS), arginase-2 and arginase activity were determined in IUGR HUAEC and HUVEC. In IUGR vessels eNOS-dependent relaxation was reduced, being improved by BEC. This effect was higher in arteries than veins, and in chorionic compared with umbilical vessels. In cultured IUGR endothelial cells, arginase-2 protein expression and activity were increased in HUVEC, without changes in HUAEC. In IUGR-derived endothelium there was a generalized reduction in the in vitro eNOS activation (Ser(1177)-P-eNOS/eNOS), and therefore a decreased eNOS/arginase activity ratio. Here we provide ex vivo and in vitro evidence for a vascular role of arginase throughout placental vasculature, negatively controlling NOS activity. This effect seems to be crucial in the pathophysiology of endothelial dysfunction present in IUGR feto-placental vessels.
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Affiliation(s)
- B J Krause
- Division of Obstetrics and Gynecology, School of Medicine, Faculty of Medicine, Pontificia Universidad Católica de Chile, Marcoleta 391, Santiago, Chile
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