| Developmental changes in antioxidant enzymatic defences against oxidative stress in sheep placentomes. | |
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MedLine Citation:
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PMID: 20097690 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Early pregnancy is susceptible to oxidative stress, and thus characterisation of antioxidant systems and pro- and anti-apoptotic pathways would improve understanding of placental development and function. We aimed, therefore, to determine the activities of the antioxidant enzymes, copper/zinc-superoxide dismutase (SOD1), manganese-SOD (SOD2), catalase (CAT), glutathione (GSH) peroxidase (GPX) and GSH reductase (GSR); and to quantify the expression of BAX and MCL1 proteins in relation to the developmental changes in antioxidant defences in sheep placentomes sampled on days 35, 55 and 80 of pregnancy. Placentome progesterone content was analyzed to determine steroidogenic capacity. Malondialdehyde (MDA) and protein carbonyl were quantified in placentomes as biomarkers of lipid peroxidation and protein damage respectively. Placentome tissues demonstrated significantly increased content of progesterone and MDA at day 80 of pregnancy and protein carbonyl as early as day 50 of pregnancy. Progesterone and MDA contents were not different between days 35 and 55 of pregnancy. While SOD1 and CAT activities did not alter significantly, SOD2 activity decreased from days 35 to 55. GPX activity increased from days 35 to 55 and increased further to day 80 of pregnancy. GSR activity increased from days 35 to 55 of pregnancy. BAX protein expression decreased, while MCL1 increased from days 35 to 55 and 80 of pregnancy. The increased GPX activity was associated with a decrease in the BAX/MCL1 protein expression ratio. Changes in the antioxidant enzymatic defences could be a part of placentome adaptation to reactive oxygen species-induced oxidative stress at specific early developmental stages of pregnancy. |
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Authors:
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Catherine Garrel; Paul A Fowler; Ka?s H Al-Gubory |
Publication Detail:
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Type: Journal Article Date: 2010-01-22 |
Journal Detail:
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Title: The Journal of endocrinology Volume: 205 ISSN: 1479-6805 ISO Abbreviation: J. Endocrinol. Publication Date: 2010 Apr |
Date Detail:
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Created Date: 2010-03-15 Completed Date: 2010-04-08 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0375363 Medline TA: J Endocrinol Country: England |
Other Details:
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Languages: eng Pagination: 107-16 Citation Subset: IM |
Affiliation:
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Laboratoire de Biologie du Stress Oxydant, D?partement de Biologie Int?gr?e, Centre Hospitalier Universitaire de Grenoble, Grenoble Cedex 9, France. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Antioxidants / metabolism* Catalase / metabolism Female Glutathione Peroxidase / metabolism Malondialdehyde / metabolism Models, Animal Oxidative Stress / physiology* Placenta / enzymology* Pregnancy Pregnancy, Animal / metabolism* Protein Carbonylation Sheep Superoxide Dismutase / metabolism bcl-2-Associated X Protein / metabolism |
| Chemical | |
Reg. No./Substance:
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0/Antioxidants; 0/bcl-2-Associated X Protein; 542-78-9/Malondialdehyde; EC 1.11.1.6/Catalase; EC 1.11.1.9/Glutathione Peroxidase; EC 1.15.1.1/Superoxide Dismutase |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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