Decreased Granulosa Cell Luteinizing Hormone Sensitivity and Altered Thecal Estradiol Concentration in the Aged Hen, Gallus Domesticus1
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منابع مشابه
P-228: Altered Expression of Folliclestimulating Hormone Receptor and Luteinizing Hormone Receptor in Granulosa Cells from Women with Polycystic Ovary Syndrome
Background: Polycystic ovary syndrome (PCOS) is a common complex genetic endocrinopathy, affecting 5 - 10% of women at reproductive age. PCO granulosa cells seem to have abnormal responses to follicle- stimulating hormone (FSH). FSH is considered to be a pituitary glycoprotein that plays an important role during folliculogenesis as it promotes the proliferation and differentiation of granulosa ...
متن کاملRegulation of steroidogenic acute regulatory protein and luteinizing hormone receptor messenger ribonucleic acid in hen granulosa cells.
The regulation of steroidogenic acute regulatory protein (StAR) in vitro by gonadotropins was investigated in granulosa cells from prehierarchal and preovulatory hen follicles. Basal levels of StAR messenger RNA (mRNA) in undifferentiated granulosa cells from prehierarchal (6- to 8-mm) follicles were consistently low, but detectable, and were significantly increased by treatment with 8-bromo-cA...
متن کاملLuteinizing hormone elevation in ovarian granulosa cell tumor: a case report and review of the literature
BACKGROUND Ovarian granulosa cell tumors (GCTs) are the most common type of potentially malignant ovarian sex cord-stromal tumor. GCTs often produce estrogen and/or progesterone; consequently, symptoms related to hyperestrogenism are common at diagnosis. Nonspecific symptoms or signs associated with this neoplasm include amenorrhea and changes in various sex hormone levels, which can be hard to...
متن کاملExpression and localization of growth hormone receptor in the oviduct of the laying hen (Gallus domesticus).
The purpose of the present study was to examine growth hormone receptor (GHR) gene expression by real-time PCR and demonstrate immunocytochemically the localization of GHR in four chicken oviductal parts, i.e. infundibulum, magnum, isthmus and shell gland. Experiments were carried out on Hy-Line laying hens decapitated 2 h after oviposition. GHR mRNA was expressed in all examined oviductal segm...
متن کاملInteraction of estradiol and luteinizing hormone releasing hormone on follicle stimulating hormone release in cattle.
To study the mechanism by which estradiol induces a preovulatory surge of follicle stimulating hormone (FSH), we concluded experiments designed to determine: (1) the time course of change in luteinizing hormone releasing hormone (LHRH)-induced FSH release after estradiol in vivo, and (2) whether LHRH is required to trigger the FSH surge. Steers were given 1 microgram LHRH at 20-min intervals fo...
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ژورنال
عنوان ژورنال: Biology of Reproduction
سال: 1986
ISSN: 0006-3363,1529-7268
DOI: 10.1095/biolreprod35.3.641