4.7 Article

Changes in Serum Oxytocin Levels under Physiological and Supraphysiological Gonadal Steroid Hormone Conditions in Women of Reproductive Age: A Preliminary Study

期刊

NUTRIENTS
卷 14, 期 24, 页码 -

出版社

MDPI
DOI: 10.3390/nu14245350

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oxytocin; estrogen; IVF; ICS

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  1. AMED
  2. [JP22gk0110068]

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Oxytocin (OT) levels are influenced by estrogen and progesterone, with estrogen possibly positively regulating OT levels and progesterone negatively regulating them. However, the physiological roles of gonadal steroids on OT remain unclear.
Oxytocin (OT) affects many behavioral, psychological, and physiological functions, including appetite and body weight regulation. Central and peripheral OT levels are markedly affected by gonadal steroids, especially estrogen, and the anorectic effects of estrogen are partially mediated by OT in rodents. In this study, the relationship between the estrogen milieu and serum OT levels was evaluated in women of reproductive age under physiological (n = 9) and supraphysiological estrogenic conditions (n = 7). Consequently, it was found that serum OT levels were increased in physiological (the ovulatory phase) and supraphysiological (on the day of the human chorionic gonadotropin trigger in an ovarian stimulation cycle) estrogenic conditions, and that serum OT levels were positively correlated with serum estradiol levels. On the other hand, serum OT levels were negatively correlated with serum progesterone levels, and there was no correlation between serum and follicular OT levels. These results suggest that OT levels may be positively and negatively regulated by estrogen and progesterone, respectively, in humans. However, the physiological roles of these actions of gonadal steroids on OT remain unclear.

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