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Träfflista för sökning "WFRF:(Jung Seungyoun) "

Sökning: WFRF:(Jung Seungyoun)

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1.
  • Fortner, Renée T., et al. (författare)
  • Anti-Mullerian hormone and endometrial cancer : a multi-cohort study
  • 2017
  • Ingår i: British Journal of Cancer. - Nature Publishing Group. - 0007-0920. ; 117:9, s. 1412-1418
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: The Mullerian ducts are the embryological precursors of the female reproductive tract, including the uterus; anti-Mullerian hormone (AMH) has a key role in the regulation of foetal sexual differentiation. Anti-Mullerian hormone inhibits endometrial tumour growth in experimental models by stimulating apoptosis and cell cycle arrest. To date, there are no prospective epidemiologic data on circulating AMH and endometrial cancer risk. Methods: We investigated this association among women premenopausal at blood collection in a multicohort study including participants from eight studies located in the United States, Europe, and China. We identified 329 endometrial cancer cases and 339 matched controls. AntiMullerian hormone concentrations in blood were quantified using an enzyme-linked immunosorbent assay. Conditional logistic regression was used to estimate odds ratios (ORs) and 95% confidence intervals (CI) across tertiles and for a doubling of AMH concentrations (ORlog2). Subgroup analyses were performed by ages at blood donation and diagnosis, oral contraceptive use, and tumour characteristics. Results: Anti-Mullerian hormone was not associated with the risk of endometrial cancer overall (ORlog(2): 1.07 (0.99-1.17)), or with any of the examined subgroups. Conclusions: Although experimental models implicate AMH in endometrial cancer growth inhibition, our findings do not support a role for circulating AMH in the aetiology of endometrial cancer.
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2.
  • Jung, Seungyoun, et al. (författare)
  • Alcohol consumption and breast cancer risk by estrogen receptor status: : in a pooled analysis of 20 studies
  • 2016
  • Ingår i: International Journal of Epidemiology. - OXFORD UNIV PRESS. - 0300-5771. ; 45:3, s. 916-928
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Breast cancer aetiology may differ by estrogen receptor (ER) status. Associations of alcohol and folate intakes with risk of breast cancer defined by ER status were examined in pooled analyses of the primary data from 20 cohorts. Methods: During a maximum of 6-18 years of follow-up of 1 089 273 women, 21 624 ER+ and 5113 ER- breast cancers were identified. Study-specific multivariable relative risks (RRs) were calculated using Cox proportional hazards regression models and then combined using a random-effects model. Results: Alcohol consumption was positively associated with risk of ER+ and ER- breast cancer. The pooled multivariable RRs (95% confidence intervals) comparing amp;gt;= 30 g/d with 0 g/day of alcohol consumption were 1.35 (1.23-1.48) for ER+ and 1.28 (1.10-1.49) for ER+ breast cancer (P-trend amp;lt;= 0.001; Pcommon-effects by ER status: 0.57). Associations were similar for alcohol intake from beer, wine and liquor. The associations with alcohol intake did not vary significantly by total (from foods and supplements) folate intake (P-interaction amp;gt;= 0.26). Dietary (from foods only) and total folate intakes were not associated with risk of overall, ER+ and ER- breast cancer; pooled multivariable RRs ranged from 0.98 to 1.02 comparing extreme quintiles. Following-up US studies through only the period before mandatory folic acid fortification did not change the results. The alcohol and folate associations did not vary by tumour subtypes defined by progesterone receptor status. Conclusions: Alcohol consumption was positively associated with risk of both ER+ and ER- breast cancer, even among women with high folate intake. Folate intake was not associated with breast cancer risk.
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3.
  • Jung, Seungyoun, et al. (författare)
  • Anti‐Müllerian hormone and risk of ovarian cancer in nine cohorts
  • 2018
  • Ingår i: International Journal of Cancer. - John Wiley & Sons. - 0020-7136. ; 142:2, s. 262-270
  • Tidskriftsartikel (refereegranskat)abstract
    • Animal and experimental data suggest that anti‐Müllerian hormone (AMH) serves as a marker of ovarian reserve and inhibits the growth of ovarian tumors. However, few epidemiologic studies have examined the association between AMH and ovarian cancer risk. We conducted a nested case‐control study of 302 ovarian cancer cases and 336 matched controls from nine cohorts. Prediagnostic blood samples of premenopausal women were assayed for AMH using a picoAMH enzyme‐linked immunosorbent assay. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated using multivariable‐adjusted conditional logistic regression. AMH concentration was not associated with overall ovarian cancer risk. The multivariable‐adjusted OR (95% CI), comparing the highest to the lowest quartile of AMH, was 0.99 (0.59–1.67) (Ptrend: 0.91). The association did not differ by age at blood draw or oral contraceptive use (all Pheterogeneity: ≥0.26). There also was no evidence for heterogeneity of risk for tumors defined by histologic developmental pathway, stage, and grade, and by age at diagnosis and time between blood draw and diagnosis (all Pheterogeneity: ≥0.39). In conclusion, this analysis of mostly late premenopausal women from nine cohorts does not support the hypothesized inverse association between prediagnostic circulating levels of AMH and risk of ovarian cancer.
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4.
  • Jung, Seungyoun, et al. (författare)
  • Demographic, lifestyle, and other factors in relation to antimullerian hormone levels in mostly late premenopausal women
  • 2017
  • Ingår i: Fertility and Sterility. - ELSEVIER SCIENCE INC. - 0015-0282. ; 107:4
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective: To identify reproductive, lifestyle, hormonal, and other correlates of circulating antimullerian hormone (AMH) concentrations in mostly late premenopausal women. Design: Cross-sectional study. Setting: Not applicable. Patient(s): A total of 671 premenopausal women not known to have cancer. Intervention(s): None. Main Outcome Measure(s): Concentrations of AMH were measured in a single laboratory using the picoAMH ELISA. Multivariable-adjusted median (and interquartile range) AMH concentrations were calculated using quantile regression for several potential correlates. Result(s): Older women had significantly lower AMH concentrations (>= 40 [n = 444] vs. < 35 years [n = 64], multivariable-adjusted median 0.73 ng/mL vs. 2.52 ng/mL). Concentrations of AMH were also significantly lower among women with earlier age at menarche (< 12 [n = 96] vs. >= 14 years [n = 200]: 0.90 ng/mL vs. 1.12 ng/mL) and among current users of oral contraceptives (n = 27) compared with never or former users (n = 468) (0.36 ng/mL vs. 1.15 ng/mL). Race, body mass index, education, height, smoking status, parity, and menstrual cycle phase were not significantly associated with AMH concentrations. There were no significant associations between AMH concentrations and androgen or sex hormone-binding globulin concentrations or with factors related to blood collection (e.g., sample type, time, season, and year of blood collection). Conclusion(s): Among premenopausal women, lower AMH concentrations are associated with older age, a younger age at menarche, and currently using oral contraceptives, suggesting these factors are related to a lower number or decreased secretory activity of ovarian follicles.
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5.
  • Jung, Seungyoun, et al. (författare)
  • Fruit and Vegetable Intake and Risk of Breast Cancer by Hormone Receptor Status
  • 2013
  • Ingår i: Journal of the National Cancer Institute. - Oxford University Press (OUP): Policy B1. - 0027-8874. ; 105:3, s. 219-236
  • Tidskriftsartikel (refereegranskat)abstract
    • Estrogen receptornegative (ER) breast cancer has few known or modifiable risk factors. Because ER tumors account for only 15% to 20% of breast cancers, large pooled analyses are necessary to evaluate precisely the suspected inverse association between fruit and vegetable intake and risk of ER breast cancer. less thanbrgreater than less thanbrgreater thanAmong 993 466 women followed for 11 to 20 years in 20 cohort studies, we documented 19 869 estrogen receptor positive (ER) and 4821 ER breast cancers. We calculated study-specific multivariable relative risks (RRs) and 95% confidence intervals (CIs) using Cox proportional hazards regression analyses and then combined them using a random-effects model. All statistical tests were two-sided. less thanbrgreater than less thanbrgreater thanTotal fruit and vegetable intake was statistically significantly inversely associated with risk of ER breast cancer but not with risk of breast cancer overall or of ER tumors. The inverse association for ER tumors was observed primarily for vegetable consumption. The pooled relative risks comparing the highest vs lowest quintile of total vegetable consumption were 0.82 (95% CI 0.74 to 0.90) for ER breast cancer and 1.04 (95% CI 0.97 to 1.11) for ER breast cancer (Pcommon-effects by ER status andlt; .001). Total fruit consumption was non-statistically significantly associated with risk of ER breast cancer (pooled multivariable RR comparing the highest vs lowest quintile 0.94, 95% CI 0.85 to 1.04). less thanbrgreater than less thanbrgreater thanWe observed no association between total fruit and vegetable intake and risk of overall breast cancer. However, vegetable consumption was inversely associated with risk of ER breast cancer in our large pooled analyses.
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