Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 70 for “"Luteinizing Hormone (LH)"”.
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Luteinizing hormone (LH) receptor expression in the penis and its possible role in pathogenesis of erectile disturbances
… meeste kõrgenenud luteiniseeriva hormooni (LH) kontsentratsioon mõjutab peenise kude ja on seeläbi seotud erektsioonihäirete tekkega. Sellise hüpoteesi eelduseks on LH retseptori ekspressioon peenises. Ajuripatsi eessagara gonadotropiin, LH, on üks tähtsamaid sugunäärmete talitluse …
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The regulation of the luteinizing hormone (LH) and the follicle stimulating hormone (FSH) by glucocorticoids and progestins
… hypoestrogenism. These could potentially involve luteinizing hormone (LH), follicle-stimulating hormone (FSH), and gonadotropin-releasing hormone (GnRH), all hormones involved in the hypothalamic-pituitary-ovarian (HPO) axis and key regulators of E2 synthesis and release. This thesis analyzed the …
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Regulation of Antepartum Relaxin Release in the Pregnant Rat: Role of the Maternal Pituitary Gland, Luteinizing Hormone and Prostaglandins
… in luteolysis; these are the maternal pituitary, luteinizing hormone (LH) and prostaglandin (PG) F(,2(alpha)).
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The Influence of Gonadotropin-Releasing Hormone on Pubertal Development of Dairy Bulls (Reproduction, Prepubertal, Lh, Testosterone)
… Holstein bulls would increase the secretion of luteinizing hormone (LH), necessary for pubertal development. Preliminary experiments investigated the sensitivity of GnRH potency to storage up to one month at 37(DEGREES)C. GnRH injected into immature rats (0.25, 0.5, and 1.0 (mu)g per 100 g body …
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Equine Luteinizing Hormone Profile Characteristics: Effects of Sampling Interval, Method of Analysis, Reproductive State, Gonadotropin-Releasing Hormone and Foal Removal
Studies in several species have indicated that luteinizing hormone (LH) profile characteristics vary with reproductive state. LH profiles may change rapidly, with pulses often occurring on an hourly or even more frequent basis. Only recently have these transitory changes been examined in mares. The …
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The hypothalamic-hypophysial-gonadal axis in the freely behaving male rat
It is a generally accepted finding that pulsatile luteinizing hormone (LH) secretion in the male rat is orchestrated by hypothalamic release of luteinizing hormone releasing-hormone (LHRH). A consequence of both its anatomical predicament and its rapid half-life, is that LHRH is largely …
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The role of extracellular loop three of the human gonadotropin releasing hormone receptor in ligand selectivity
… neuropeptide, gonadotropin releasing hormone (GnRH) perferentially inteacts with GnRH type I receptors on the gonadotropes in the anterior pituitary. Activation of the GnRH receptor is required for the biosynthesis and release of luteinizing hormone (LH) and follicle stimulating …
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Identification of a Gonadotropin Releasing Hormone-Like Factor in the Rabbit Placenta (Pregnancy, Corpus Luteum, Fetus)
… of embryo removal on progesterone (P(,4)) and luteinizing hormone (LH) levels in pregnant does. We found that P(,4) and LH profiles of pregnant does that had embryos removed prior to day 7 were not different from those of pseudopregnant controls. Next we determined the effect of conceptus …
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Localization of Luteinizing Hormone-Releasing Hormone (LHRH) in the Hypothalamus of Fetal Bovine
Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH) are mammalian gonadotropins released from the anterior pituitary by Gonadotropin Releasing Hormone (GnRH) in the hypothalamus. Various analogs ofGnRH have been identified. Localization of these hormones is the first step in discovering …
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Mechanisms by which hypoxia augments Leydig cell viability and differentiated cell function in vitro
… extra-pituitary sources of the neurohypophysial hormone oxytocin in non-neural tissues of several animal species. The presence, location and biosynthesis of significant amounts of oxytocin in the ovarian corpus luteum was followed by the immunocytochemical demonstration of an oxytocin-like …
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Modeling “Abnormal” Ovulatory Dynamics: Enzymes, Insulin, and the Impact of Stress
… processes including gonadotropin-releasing hormone, kisspeptin signaling, and the ovulatory cycle. Integral to our model development, we define ovulatory criteria, conduct an extensive global sensitivity analysis, and fit parameters to clinical hormone data throughout the ovulatory cycle. We …
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Bone morphogenetic proteins (BMPs): new modulators of the follicle stimulating hormone (FSH) synthesis and release
… requires the secretion of the gonadotropins, luteinizing hormone (LH) and follicle -stimulating hormone (FSH) synthesized by the gonadotrope cells. A tight control of the production of these hormones is crucial, particularly in females, to coordinate the terminal follicular growth, the …
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Dysregulation in polycystic ovary syndrome: mechanisms and therapeutic approaches
… It is marked by high levels of androgens (male hormones), irregular ovulation, and metabolic disorders, all of which are linked to disruptions in gonadotropin regulation. The hypothalamic-pituitary-gonadal (HPG) axis plays a key role in reproductive function, controlling the release of …
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Serial measurements of circulating glucose and luteinizing hormone concentrations in lactating dairy cattle
… for this thesis were to 1) validate a bovine luteinizing hormone (LH) ELISA for use in the laboratory and 2) validate interstitial glucose sensors designed for humans for use in lactating dairy cattle. The first experiment required validation of a bovine LH ELISA in order to measure the …
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Progesterone Receptor Regulation of the Gene Networks That Control Ovulation in Mice
… a pubertal human female, the mid-cycle surge of luteinizing hormone (LH) induces ovulation, releasing a fertilizable egg from a mature ovarian follicle. Although ovulation is a physiologically well-characterized event, the underlying molecular processes remain poorly understood. Based on research …
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The relationships between gonadotropin-releasing hormone, luteinizing hormone, and testosterone secretion in the male sheep
… the relationships between gonadotropin-releasing hormone (GnRH), luteinizing hormone (LH), and testosterone (T) in the ram. In the first study, the relationships between GnRH, LH, and T secretion were examined in intact rams in May (during the non-breeding season), September (breeding season), and …
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Localization of nerve growth factor-β in the stallion reproductive tract
… acts systemically to stimulate secretion of luteinizing hormone (LH) from the anterior pituitary, which in turn induces follicle maturation and ovulation. The objectives of the present study were to 1) determine if NGF-β is present in the reproductive tract of the stallion and 2) identify the …
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Mathematical Modeling of Perifusion Cell Culture Experiments
… In our main applications, gonadotropin releasing hormone (GnRH) or oxytocin is introduced into the chamber as the input. They stimulate the cells to secrete luteinizing hormone (LH), which is collected in the effluent. To relate the effluent LH concentration to the cellular processes producing it, …
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A study of hormones and reproduction in male and female turkeys under natural mating or artificial insemination conditions
… sex on reproduction and changes in serum luteinizing hormone (LH) and prolactin concentrations due to natural mating or artificial insemination. Male body conformation did not significantly affect male mating efficiency, whereas male sex drive was correlated with efficiency. Female sex …
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Circulating sex hormone levels in rats: a systematic analysis of the literature and perinatal BPA study
… this analysis of the factors that influence sex hormones, we also examined the effect of the known endocrine disrupting chemical, bisphenol-A (BPA), at environmentally relevant ranges on the sex hormones, follicle-stimulating hormone (FSH), luteinizing hormone (LH), T, E2, and P4 in perinatally …
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