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Selenium and Redox Enzyme Activity in Pregnant Women Exposed to Methylmercury.
| Content Provider | Europe PMC |
|---|---|
| Author | Branco, Vasco Carvalho, Luís Barboza, Cássia Mendes, Eduarda Cavaco, Afonso Carvalho, Cristina |
| Editor | Omaye, Stanley |
| Copyright Year | 2022 |
| Abstract | Selenium (Se) is a micronutrient with essential physiological functions achieved through the production of selenoproteins. Adequate Se intake has health benefits and reduces mercury (Hg) toxicity, which is important due to its neurotoxicity. This study determined the Se status and redox enzyme, including selenoproteins’, activity in pregnant women highly exposed to Hg (between 1 to 54 µg Hg/L blood) via fish consumption. A cross-sectional study enrolling 513 women between the first and third trimester of pregnancy from Madeira, Portugal was conducted, encompassing collection of blood and plasma samples. Samples were analyzed for total Se and Hg levels in whole blood and plasma, and plasma activity of redox-active proteins, such as glutathione peroxidase (GPx), thioredoxin reductase (TrxR) and thioredoxin (Trx). Enzyme activities were related to Se and Hg levels in blood. Se levels in whole blood (65.0 ± 13.1 µg/L) indicated this population had a sub-optimal Se status, which translated to low plasma GPx activity (69.7 ± 28.4 U/L). The activity of TrxR (12.3 ± 5.60 ng/mL) was not affected by the low Se levels. On the other hand, the decrease in Trx activity with an increase in Hg might be a good indicator to prevent fetal susceptibility. |
| Journal | Antioxidants (Basel, Switzerland) |
| Volume Number | 11 |
| PubMed Central reference number | PMC9687717 |
| Issue Number | 11 |
| PubMed reference number | 36421477 |
| e-ISSN | 20763921 |
| DOI | 10.3390/antiox11112291 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-11-19 |
| Access Restriction | Open |
| Rights License | Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). © 2022 by the authors. |
| Subject Keyword | selenium selenoproteins pregnant women thioredoxin reductase glutathione peroxidase thioredoxin mercury redox systems |
| Content Type | Text |
| Resource Type | Article |
| Subject | Biochemistry Cell Biology Molecular Biology Physiology Clinical Biochemistry Food Science |
