ArticleThe Journal of clinical endocrinology and metabolism2015
Compensatory Increase in Ovarian Aromatase in Older Regularly Cycling Women.
Article in The Journal of clinical endocrinology and metabolism, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
5 citing papers in PubMed, 23 citations in OpenAlex.
- Hormones and Aging: An Endocrine Society Scientific Statement.The Journal of clinical endocrinology and metabolism · 2023Article
- Prenatal exposure to acrylamide differently affected the sex ratio, aromatase and apoptosis in female adult offspring of two subsequent generations.Physiological research · 2023Article
- GnRH agonist-triggering ovulation in women with advanced age.Scientific reports · 2022Article
- Menstrual Cycle Hormone Changes Associated with Reproductive Aging and How They May Relate to Symptoms.Obstetrics and gynecology clinics of North America · 2018Review
- Menstrual Cycle Hormone Changes in Women Traversing Menopause: Study of Women's Health Across the Nation.The Journal of clinical endocrinology and metabolism · 2017Article
Corrections and comments
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Authors and funding
8 authors at 2 institutions in 1 country.
Funding
Abstract
contextSerum estradiol (E2) levels are preserved in older reproductive-aged women with regular menstrual cycles despite declining ovarian function.
objectiveThe objective of the study was to determine whether increased granulosa cell aromatase expression and activity account for preservation of E2 levels in older, regularly cycling women.
designThe protocol included daily blood sampling and dominant follicle aspirations at an academic medical center during a natural menstrual cycle. SUBJECTS: Healthy, regularly cycling older (36-45 y; n = 13) and younger (22-34 y; n = 14) women participated in the study.
main outcome measuresHormone levels were measured in peripheral blood and follicular fluid aspirates and granulosa cell CYP19A1 (aromatase) and FSH-R mRNA expression were determined.
resultsOlder women had higher FSH levels than younger women during the early follicular phase with similar E2 but lower inhibin B and antimullerian hormone levels. Late follicular phase serum E2 did not differ between the two groups. Follicular fluid E2 [older (O) = 960.0 [interquartile range (IQR) 765.0-1419.0]; younger (Y) = 994.5 [647.3-1426.5] ng/mL, P = 1.0], estrone (O = 39.6 [29.5-54.1]; Y = 28.8 [22.5-42.1] ng/mL, P = 0.3), and the E2 to testosterone (T) ratio (O = 109.0 ± 41.9; Y = 83.0 ± 18.6, P = .50) were preserved in older women. Granulosa cell CYP19A1 expression was increased 3-fold in older compared with younger women (P < .001), with no difference in FSH-R expression.
conclusionsOvarian aromatase expression increases with age in regularly cycling women. Thus, up-regulation of aromatase activity appears to compensate for the known age-related decrease in granulosa cell number in the dominant follicle to maintain ovarian estrogen production in older premenopausal women.
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