Abstract
Objective: Oestradiol (E2) and its metabolites 2-hydroxyoestrone (2-OHE1) and 16α-hydroxyoestrone (16α-OHE1) are thought to curtail the greater oxidative stress found in the development and progression of disease conditions including atherosclerosis. We related oestrogen levels to F 2a-isoprostane levels, a biomarker of oxidative stress. Design and participants: Data were obtained from 1647 women, aged 47-57 years, participating in the fifth annual follow-up of the Study of Women's Health Across the Nation (SWAN), a study of the menopausal transition. Measurements: Serum E2 and urinary 2-OHE1 and 16α-OHE1 concentrations were determined by enzyme-linked immunosorbent assay (ELISA) and urinary F2a- isoprostanes were measured by enzyme immunoassay (EIA). Results: F 2a-isoprostane concentrations were elevated in women who smoked, a behaviour associated with increased oxidative stress, but not in stages of the natural menopause. Mean F2a-isoprostane concentrations among pre- and postmenopausal women who smoked were 1082 and 1064 pg/ml, respectively, values double those in pre- (343 pg/ml) and postmenopausal (379 pg/ml) nonsmoking women. 2-OHE1 and F2a-isoprostane concentrations were positively and highly correlated (partial correlations ρY|X = 0.44 and ρY|X = 0.43 in pre- and postmenopausal women, respectively). Similarly, 16α-OHE1 concentrations were positively and highly correlated with F2a-isoprostane concentrations (ρY|X = 0.52 and ρY|X = 0.59 in pre- and postmenopausal women, respectively). E2 was significantly correlated with F2a-isoprostanes only in postmenopausal women (ρY|X = 0.20). Associations were adjusted for age, body mass index (BMI), race/ethnicity, lipids, physical activity level and alcohol consumption. Conclusions: This study does not support the commonly held hypothesis that levels of endogenous E2 or its oestrone metabolites favourably modify oxidative stress by decreasing F2a-isoprostane levels.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 806-813 |
| Number of pages | 8 |
| Journal | Clinical Endocrinology |
| Volume | 68 |
| Issue number | 5 |
| DOIs | |
| State | Published - 2008 |
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ASJC Scopus subject areas
- Endocrinology
Cite this
Oestrogen metabolites in relation to isoprostanes as a measure of oxidative stress. / Sowers, MaryFran; McConnell, Daniel; Jannausch, Mary L.; Randolph, John F.; Brook, Robert; Gold, Ellen B; Crawford, Sybil; Lasley, Bill.
In: Clinical Endocrinology, Vol. 68, No. 5, 2008, p. 806-813.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Oestrogen metabolites in relation to isoprostanes as a measure of oxidative stress
AU - Sowers, MaryFran
AU - McConnell, Daniel
AU - Jannausch, Mary L.
AU - Randolph, John F.
AU - Brook, Robert
AU - Gold, Ellen B
AU - Crawford, Sybil
AU - Lasley, Bill
PY - 2008
Y1 - 2008
N2 - Objective: Oestradiol (E2) and its metabolites 2-hydroxyoestrone (2-OHE1) and 16α-hydroxyoestrone (16α-OHE1) are thought to curtail the greater oxidative stress found in the development and progression of disease conditions including atherosclerosis. We related oestrogen levels to F 2a-isoprostane levels, a biomarker of oxidative stress. Design and participants: Data were obtained from 1647 women, aged 47-57 years, participating in the fifth annual follow-up of the Study of Women's Health Across the Nation (SWAN), a study of the menopausal transition. Measurements: Serum E2 and urinary 2-OHE1 and 16α-OHE1 concentrations were determined by enzyme-linked immunosorbent assay (ELISA) and urinary F2a- isoprostanes were measured by enzyme immunoassay (EIA). Results: F 2a-isoprostane concentrations were elevated in women who smoked, a behaviour associated with increased oxidative stress, but not in stages of the natural menopause. Mean F2a-isoprostane concentrations among pre- and postmenopausal women who smoked were 1082 and 1064 pg/ml, respectively, values double those in pre- (343 pg/ml) and postmenopausal (379 pg/ml) nonsmoking women. 2-OHE1 and F2a-isoprostane concentrations were positively and highly correlated (partial correlations ρY|X = 0.44 and ρY|X = 0.43 in pre- and postmenopausal women, respectively). Similarly, 16α-OHE1 concentrations were positively and highly correlated with F2a-isoprostane concentrations (ρY|X = 0.52 and ρY|X = 0.59 in pre- and postmenopausal women, respectively). E2 was significantly correlated with F2a-isoprostanes only in postmenopausal women (ρY|X = 0.20). Associations were adjusted for age, body mass index (BMI), race/ethnicity, lipids, physical activity level and alcohol consumption. Conclusions: This study does not support the commonly held hypothesis that levels of endogenous E2 or its oestrone metabolites favourably modify oxidative stress by decreasing F2a-isoprostane levels.
AB - Objective: Oestradiol (E2) and its metabolites 2-hydroxyoestrone (2-OHE1) and 16α-hydroxyoestrone (16α-OHE1) are thought to curtail the greater oxidative stress found in the development and progression of disease conditions including atherosclerosis. We related oestrogen levels to F 2a-isoprostane levels, a biomarker of oxidative stress. Design and participants: Data were obtained from 1647 women, aged 47-57 years, participating in the fifth annual follow-up of the Study of Women's Health Across the Nation (SWAN), a study of the menopausal transition. Measurements: Serum E2 and urinary 2-OHE1 and 16α-OHE1 concentrations were determined by enzyme-linked immunosorbent assay (ELISA) and urinary F2a- isoprostanes were measured by enzyme immunoassay (EIA). Results: F 2a-isoprostane concentrations were elevated in women who smoked, a behaviour associated with increased oxidative stress, but not in stages of the natural menopause. Mean F2a-isoprostane concentrations among pre- and postmenopausal women who smoked were 1082 and 1064 pg/ml, respectively, values double those in pre- (343 pg/ml) and postmenopausal (379 pg/ml) nonsmoking women. 2-OHE1 and F2a-isoprostane concentrations were positively and highly correlated (partial correlations ρY|X = 0.44 and ρY|X = 0.43 in pre- and postmenopausal women, respectively). Similarly, 16α-OHE1 concentrations were positively and highly correlated with F2a-isoprostane concentrations (ρY|X = 0.52 and ρY|X = 0.59 in pre- and postmenopausal women, respectively). E2 was significantly correlated with F2a-isoprostanes only in postmenopausal women (ρY|X = 0.20). Associations were adjusted for age, body mass index (BMI), race/ethnicity, lipids, physical activity level and alcohol consumption. Conclusions: This study does not support the commonly held hypothesis that levels of endogenous E2 or its oestrone metabolites favourably modify oxidative stress by decreasing F2a-isoprostane levels.
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UR - http://www.scopus.com/inward/citedby.url?scp=42149117979&partnerID=8YFLogxK
U2 - 10.1111/j.1365-2265.2007.03108.x
DO - 10.1111/j.1365-2265.2007.03108.x
M3 - Article
C2 - 17980014
AN - SCOPUS:42149117979
VL - 68
SP - 806
EP - 813
JO - Clinical Endocrinology
JF - Clinical Endocrinology
SN - 0300-0664
IS - 5
ER -