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Prenatal expression of thioredoxin reductase 1 (TRXR1) and microsomal glutathione transferase 1 (MGST1) in humans.

Björkhem-Bergman L, Johansson M, Morgenstern R, Rane A, Ekström L - FEBS Open Bio (2014)

Bottom Line: Of the six studied splice variants of TXNRD1, four had a significantly higher expression in the fetal livers as compared to adult livers.Treatment with the demethylating agent 5-AZA resulted in decreased levels of TXNRD1 in human liver HepG2 cells but did not affect the expression of MGST1.In conclusion, the expression of TXNRD1 is higher in fetuses than in adults and might be of importance during fetal life.

View Article: PubMed Central - PubMed

Affiliation: Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital, Huddinge, SE-141 86 Stockholm, Sweden.

ABSTRACT
Thioredoxin reductase 1 (TRXR1) and microsomal glutathione transferase 1 (MGST1) are important redox and detoxifying enzymes in adult life. The aim of this study was to investigate the expression of these enzymes during fetal life. In addition, the role of gene methylation was studied since this might play an important role in the on-and-off switch of gene expression between fetal and adult life. To this end, the expression of the TRXR1-encoding gene TXNRD1 and the MGST1-encoding gene MGST1 was studied in fetal tissues. The mean mRNA expression of TXNRD1 in fetal livers were seven times higher compared to the mean expression in adult livers (p < 0.001). Of the six studied splice variants of TXNRD1, four had a significantly higher expression in the fetal livers as compared to adult livers. The mean expression of MGST1 was twofold higher in adult compared to fetal liver tissue (p = 0.01). For MGST1 the alternative first exon 1B was the predominant splice variant in both fetal and adult liver samples. The highest mRNA expression of both TXNRD1 and MGST1 was found in fetal adrenals, whereas expression was lower in fetal liver, lungs and kidneys. There was a significant correlation between the hepatic expression of TXNRD1 and MGST1. Treatment with the demethylating agent 5-AZA resulted in decreased levels of TXNRD1 in human liver HepG2 cells but did not affect the expression of MGST1. In conclusion, the expression of TXNRD1 is higher in fetuses than in adults and might be of importance during fetal life. Hepatic TXNRD1 and MGST1 are co-expressed in both fetuses and adults suggesting common regulatory mechanisms.

No MeSH data available.


Correlation analyses between the relative mRNA expression of TXNRD1 and MGST1 in fetal (N = 59) and adult (N = 17) liver tissue were performed using Spearman rank method. There was a significant correlation between hepatic TXNRD1 and MGST1 mRNA levels in both fetal (r = 0.49, p < 0.0001) and adult liver tissue (r = 0.60, p = 0.01).
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f0020: Correlation analyses between the relative mRNA expression of TXNRD1 and MGST1 in fetal (N = 59) and adult (N = 17) liver tissue were performed using Spearman rank method. There was a significant correlation between hepatic TXNRD1 and MGST1 mRNA levels in both fetal (r = 0.49, p < 0.0001) and adult liver tissue (r = 0.60, p = 0.01).

Mentions: There was a significant correlation between hepatic TXNRD1 and MGST1 mRNA levels in both the fetuses (r = 0.49, p < 0.0001) and adult samples (r = 0.60, p = 0.01) (Fig. 4).


Prenatal expression of thioredoxin reductase 1 (TRXR1) and microsomal glutathione transferase 1 (MGST1) in humans.

Björkhem-Bergman L, Johansson M, Morgenstern R, Rane A, Ekström L - FEBS Open Bio (2014)

Correlation analyses between the relative mRNA expression of TXNRD1 and MGST1 in fetal (N = 59) and adult (N = 17) liver tissue were performed using Spearman rank method. There was a significant correlation between hepatic TXNRD1 and MGST1 mRNA levels in both fetal (r = 0.49, p < 0.0001) and adult liver tissue (r = 0.60, p = 0.01).
© Copyright Policy - CC BY-NC-ND
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4215115&req=5

f0020: Correlation analyses between the relative mRNA expression of TXNRD1 and MGST1 in fetal (N = 59) and adult (N = 17) liver tissue were performed using Spearman rank method. There was a significant correlation between hepatic TXNRD1 and MGST1 mRNA levels in both fetal (r = 0.49, p < 0.0001) and adult liver tissue (r = 0.60, p = 0.01).
Mentions: There was a significant correlation between hepatic TXNRD1 and MGST1 mRNA levels in both the fetuses (r = 0.49, p < 0.0001) and adult samples (r = 0.60, p = 0.01) (Fig. 4).

Bottom Line: Of the six studied splice variants of TXNRD1, four had a significantly higher expression in the fetal livers as compared to adult livers.Treatment with the demethylating agent 5-AZA resulted in decreased levels of TXNRD1 in human liver HepG2 cells but did not affect the expression of MGST1.In conclusion, the expression of TXNRD1 is higher in fetuses than in adults and might be of importance during fetal life.

View Article: PubMed Central - PubMed

Affiliation: Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital, Huddinge, SE-141 86 Stockholm, Sweden.

ABSTRACT
Thioredoxin reductase 1 (TRXR1) and microsomal glutathione transferase 1 (MGST1) are important redox and detoxifying enzymes in adult life. The aim of this study was to investigate the expression of these enzymes during fetal life. In addition, the role of gene methylation was studied since this might play an important role in the on-and-off switch of gene expression between fetal and adult life. To this end, the expression of the TRXR1-encoding gene TXNRD1 and the MGST1-encoding gene MGST1 was studied in fetal tissues. The mean mRNA expression of TXNRD1 in fetal livers were seven times higher compared to the mean expression in adult livers (p < 0.001). Of the six studied splice variants of TXNRD1, four had a significantly higher expression in the fetal livers as compared to adult livers. The mean expression of MGST1 was twofold higher in adult compared to fetal liver tissue (p = 0.01). For MGST1 the alternative first exon 1B was the predominant splice variant in both fetal and adult liver samples. The highest mRNA expression of both TXNRD1 and MGST1 was found in fetal adrenals, whereas expression was lower in fetal liver, lungs and kidneys. There was a significant correlation between the hepatic expression of TXNRD1 and MGST1. Treatment with the demethylating agent 5-AZA resulted in decreased levels of TXNRD1 in human liver HepG2 cells but did not affect the expression of MGST1. In conclusion, the expression of TXNRD1 is higher in fetuses than in adults and might be of importance during fetal life. Hepatic TXNRD1 and MGST1 are co-expressed in both fetuses and adults suggesting common regulatory mechanisms.

No MeSH data available.