Antenatal melatonin modulates an enhanced antioxidant/pro-oxidant ratio in pulmonary hypertensive newborn sheep
Chronic hypobaric hypoxia during fetal and neonatal life induces neonatal pulmonary hypertension. Hypoxia and oxidative stress are driving this condition, which implies an increase generation of reactive oxygen species (ROS) and/or decreased antioxidant capacity. Melatonin has antioxidant properties...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2019-04-01
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| Series: | Redox Biology |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213231718308978 |
| _version_ | 1818296484333879296 |
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| author | Alejandro Gonzalez-Candia Marcelino Veliz Catalina Carrasco-Pozo Rodrigo L. Castillo J. Cesar Cárdenas Germán Ebensperger Roberto V. Reyes Aníbal J. Llanos Emilio A. Herrera |
| author_facet | Alejandro Gonzalez-Candia Marcelino Veliz Catalina Carrasco-Pozo Rodrigo L. Castillo J. Cesar Cárdenas Germán Ebensperger Roberto V. Reyes Aníbal J. Llanos Emilio A. Herrera |
| author_sort | Alejandro Gonzalez-Candia |
| collection | DOAJ |
| description | Chronic hypobaric hypoxia during fetal and neonatal life induces neonatal pulmonary hypertension. Hypoxia and oxidative stress are driving this condition, which implies an increase generation of reactive oxygen species (ROS) and/or decreased antioxidant capacity. Melatonin has antioxidant properties that decrease oxidative stress and improves pulmonary vascular function when administered postnatally. However, the effects of an antenatal treatment with melatonin in the neonatal pulmonary function and oxidative status are unknown. Therefore, we hypothesized that an antenatal therapy with melatonin improves the pulmonary arterial pressure and antioxidant status in high altitude pulmonary hypertensive neonates. Twelve ewes were bred at high altitude (3600 m); 6 of them were used as a control group (vehicle 1.4% ethanol) and 6 as a melatonin treated group (10 mg d-1 melatonin in vehicle). Treatments were given once daily during the last third of gestation (100–150 days). Lambs were born and raised with their mothers until 12 days old, and neonatal pulmonary arterial pressure and resistance, plasma antioxidant capacity and the lung oxidative status were determined. Furthermore, we measured the pulmonary expression and activity for the antioxidant enzymes superoxide dismutase, catalase and glutathione peroxidase, and the oxidative stress markers 8-isoprostanes, 4HNE and nitrotyrosine. Finally, we assessed pulmonary pro-oxidant sources by the expression and function of NADPH oxidase, mitochondria and xanthine oxidase. Melatonin decreased the birth weight. However, melatonin enhanced the plasma antioxidant capacity and decreased the pulmonary antioxidant activity, associated with a diminished oxidative stress during postnatal life. Interestingly, melatonin also decreased ROS generation at the main pro-oxidant sources. Our findings suggest that antenatal administration of melatonin programs an enhanced antioxidant/pro-oxidant status, modulating ROS sources in the postnatal lung. Keywords: Oxidative stress, Antioxidant system, Neonatal pulmonary circulation, Chronic hypoxia, Pulmonary pro-oxidant capacity, DOHaD |
| first_indexed | 2024-12-13T04:04:16Z |
| format | Article |
| id | doaj.art-da4bcb30a36e4af6971119f72dbc1117 |
| institution | Directory Open Access Journal |
| issn | 2213-2317 |
| language | English |
| last_indexed | 2024-12-13T04:04:16Z |
| publishDate | 2019-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Redox Biology |
| spelling | doaj.art-da4bcb30a36e4af6971119f72dbc11172022-12-22T00:00:18ZengElsevierRedox Biology2213-23172019-04-0122Antenatal melatonin modulates an enhanced antioxidant/pro-oxidant ratio in pulmonary hypertensive newborn sheepAlejandro Gonzalez-Candia0Marcelino Veliz1Catalina Carrasco-Pozo2Rodrigo L. Castillo3J. Cesar Cárdenas4Germán Ebensperger5Roberto V. Reyes6Aníbal J. Llanos7Emilio A. Herrera8Programa de Fisiopatología, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Av. Salvador 486, Providencia 7500922, Santiago, ChilePrograma de Fisiopatología, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Av. Salvador 486, Providencia 7500922, Santiago, ChileDepartamento de Nutrición, Facultad de Medicina, Universidad de Chile, Av. Independencia 1027, Independencia, Santiago, ChilePrograma de Fisiopatología, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Av. Salvador 486, Providencia 7500922, Santiago, Chile; Departamento de Medicina Interna Oriente, Facultad de Medicina, Universidad de Chile, Santiago, ChilePrograma de Anatomía y Biología del Desarrollo, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Santiago, Chile; Geroscience Center for Brain Health and Metabolism, Santiago, ChilePrograma de Fisiopatología, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Av. Salvador 486, Providencia 7500922, Santiago, ChilePrograma de Fisiopatología, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Av. Salvador 486, Providencia 7500922, Santiago, ChilePrograma de Fisiopatología, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Av. Salvador 486, Providencia 7500922, Santiago, Chile; International Center for Andean Studies (INCAS), Universidad de Chile, Baquedano s/n, Putre, ChilePrograma de Fisiopatología, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Av. Salvador 486, Providencia 7500922, Santiago, Chile; International Center for Andean Studies (INCAS), Universidad de Chile, Baquedano s/n, Putre, Chile; Corresponding author at: Programa de Fisiopatología, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Av. Salvador 486, Providencia 7500922, Santiago, Chile.Chronic hypobaric hypoxia during fetal and neonatal life induces neonatal pulmonary hypertension. Hypoxia and oxidative stress are driving this condition, which implies an increase generation of reactive oxygen species (ROS) and/or decreased antioxidant capacity. Melatonin has antioxidant properties that decrease oxidative stress and improves pulmonary vascular function when administered postnatally. However, the effects of an antenatal treatment with melatonin in the neonatal pulmonary function and oxidative status are unknown. Therefore, we hypothesized that an antenatal therapy with melatonin improves the pulmonary arterial pressure and antioxidant status in high altitude pulmonary hypertensive neonates. Twelve ewes were bred at high altitude (3600 m); 6 of them were used as a control group (vehicle 1.4% ethanol) and 6 as a melatonin treated group (10 mg d-1 melatonin in vehicle). Treatments were given once daily during the last third of gestation (100–150 days). Lambs were born and raised with their mothers until 12 days old, and neonatal pulmonary arterial pressure and resistance, plasma antioxidant capacity and the lung oxidative status were determined. Furthermore, we measured the pulmonary expression and activity for the antioxidant enzymes superoxide dismutase, catalase and glutathione peroxidase, and the oxidative stress markers 8-isoprostanes, 4HNE and nitrotyrosine. Finally, we assessed pulmonary pro-oxidant sources by the expression and function of NADPH oxidase, mitochondria and xanthine oxidase. Melatonin decreased the birth weight. However, melatonin enhanced the plasma antioxidant capacity and decreased the pulmonary antioxidant activity, associated with a diminished oxidative stress during postnatal life. Interestingly, melatonin also decreased ROS generation at the main pro-oxidant sources. Our findings suggest that antenatal administration of melatonin programs an enhanced antioxidant/pro-oxidant status, modulating ROS sources in the postnatal lung. Keywords: Oxidative stress, Antioxidant system, Neonatal pulmonary circulation, Chronic hypoxia, Pulmonary pro-oxidant capacity, DOHaDhttp://www.sciencedirect.com/science/article/pii/S2213231718308978 |
| spellingShingle | Alejandro Gonzalez-Candia Marcelino Veliz Catalina Carrasco-Pozo Rodrigo L. Castillo J. Cesar Cárdenas Germán Ebensperger Roberto V. Reyes Aníbal J. Llanos Emilio A. Herrera Antenatal melatonin modulates an enhanced antioxidant/pro-oxidant ratio in pulmonary hypertensive newborn sheep Redox Biology |
| title | Antenatal melatonin modulates an enhanced antioxidant/pro-oxidant ratio in pulmonary hypertensive newborn sheep |
| title_full | Antenatal melatonin modulates an enhanced antioxidant/pro-oxidant ratio in pulmonary hypertensive newborn sheep |
| title_fullStr | Antenatal melatonin modulates an enhanced antioxidant/pro-oxidant ratio in pulmonary hypertensive newborn sheep |
| title_full_unstemmed | Antenatal melatonin modulates an enhanced antioxidant/pro-oxidant ratio in pulmonary hypertensive newborn sheep |
| title_short | Antenatal melatonin modulates an enhanced antioxidant/pro-oxidant ratio in pulmonary hypertensive newborn sheep |
| title_sort | antenatal melatonin modulates an enhanced antioxidant pro oxidant ratio in pulmonary hypertensive newborn sheep |
| url | http://www.sciencedirect.com/science/article/pii/S2213231718308978 |
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