Effects of FSH on serum immunoreactive inhibin levels in the luteal phase of the menstrual cycle
| Autor: | Mirella Prince, Mohan Bangah, Henry G. Burger, Takahide Mori, Toshiko Iwai, Philip I. McCloud, Jennifer Hee, Akira Ohara |
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| Rok vydání: | 1996 |
| Předmět: |
Adult
endocrine system medicine.medical_specialty medicine.drug_class Endocrinology Diabetes and Metabolism media_common.quotation_subject Luteal Phase Biology Luteal phase Peptide hormone Endocrinology Internal medicine Follicular phase medicine Humans Inhibins Ovulation Progesterone reproductive and urinary physiology Menstrual cycle media_common Dose-Response Relationship Drug Estradiol urogenital system Hormones medicine.anatomical_structure Female Follicle Stimulating Hormone Gonadotropin Corpus luteum hormones hormone substitutes and hormone antagonists Hormone |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 0300-0664 |
| DOI: | 10.1046/j.1365-2265.1996.8010811.x |
| Popis: | OBJECTIVE FSHcauses a dose-related increase in circulating immunoreactive inhibin (INH) in the follicular phase of the menstrual cycle, while LH is the major stimulus to INH secretion by the corpus luteum. The present study was undertaken to assess whether FSH can also stimulate INH production during the luteal phase. DESIGN Normal volunteers were treated with a single injection of LH-free FSH (Metrodin, 150 units) or saline as control, during the early, mid- or late luteal phase of the cycle, with subsequent hormone measurements. PATIENTS The 21 volunteers were aged 19–29. Seven subjects given FSH and 8 controls were studied in the early luteal phase, 1–4 days post ovulation. Eight FSH treated subjects and 10 controls were studied in the mid-luteal phase, 5–9 days post ovulation, and 6 each, respectively, were studied in the late luteal phase. MEASUREMENTS Oestradiol (E2), progesterone (P), and INH were measured by previously described radioimmunoassays. RESULTS In both the early and mid-luteal phases, FSH caused a significant rise in INH (early, from 778 to 922 U/l, mid-luteal 1553 to 2090 U/l) and E2 (early 371 to 545 pmol/l, mid-luteal 528 to 636) while there was no significant change in P. No significant changes occurred in the saline treated subjects. In the late luteal phase FSH prevented the significant fall in INH seen in the controls, whilst there was no effect on E2 or P. CONCLUSIONS It was concluded that both FSH and LH are capable of modulating inhibin production during the luteal phase of the menstrual cycle. FSH may exert its actions on the corpus luteum or alternatively on developing follicles. The present study cannot clearly distinguish between these possibilities. |
| Databáze: | OpenAIRE |
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