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Cardiovascular Toxicology
Published in: Cardiovascular Toxicology 1/2011

Open Access 01-03-2011

Glutathione-Related Antioxidant Defense System in Elderly Patients Treated for Hypertension

Authors: J. Rybka, D. Kupczyk, K. Kędziora-Kornatowska, J. Motyl, J. Czuczejko, K. Szewczyk-Golec, M. Kozakiewicz, H. Pawluk, L. A. Carvalho, J. Kędziora

Published in: Cardiovascular Toxicology | Issue 1/2011

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Abstract

The purpose of this study was to analyze glutathione antioxidant defense system in elderly patients treated for hypertension. Studies were carried out in the blood collected from 18 hypertensive and 15 age- and sex-matched controls, all subjects age over 60. Hypertensives were on their usual antihypertensive treatment at the time of blood collection. The concentration of glutathione (GSH) in whole blood and activities of glutathione peroxidase (GPx-1), glutathione transferase (GST), and glutathione reductase (GR) in erythrocytes were measured. The data from patients and controls were compared using independent-samples t test. P value of 0.05 and less was considered statistically significant. We observed increased glutathione-related antioxidant defense in treated hypertensive elderly patients (HT) when compared with healthy controls (C). Mean GSH concentration was significantly higher in HT when compared with C: 3.1 ± 0.29 and 2.6 ± 0.25 mmol/L, respectively, P < 0.001. Mean activity of GR was significantly higher in HT group if compared with C: 83.4 ± 15.25 U/g Hb versus 64.2 ± 8.26 U/g Hb, respectively, P < 0.001. Mean activity of GST was significantly higher in HT group compared with C: 3.0 ± 0.60 mmol CDNB-GSH/mgHb/min and 2.6 ± 0.36 mmol CDNB-GSH/mgHb/min, respectively, P < 0.05. No difference in GPx activity was observed between two groups. These results show that glutathione-related antioxidant defense system was enhanced in elderly hypertensive patients treated for their conditions. This suggests important role of glutathione system in blood pressure regulation. Alterations in concentration and activity of antioxidants observed during antihypertensive medication are likely to be related to the effect of the treatment on NO bioavailability.
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Metadata
Title
Glutathione-Related Antioxidant Defense System in Elderly Patients Treated for Hypertension
Authors
J. Rybka
D. Kupczyk
K. Kędziora-Kornatowska
J. Motyl
J. Czuczejko
K. Szewczyk-Golec
M. Kozakiewicz
H. Pawluk
L. A. Carvalho
J. Kędziora
Publication date
01-03-2011
Publisher
Humana Press Inc
Published in
Cardiovascular Toxicology / Issue 1/2011
Print ISSN: 1530-7905
Electronic ISSN: 1559-0259
DOI
https://doi.org/10.1007/s12012-010-9096-5

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