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The synthesis and release of hormones from human adenohypophyses in vitroSiler, Theresa Marie January 1971 (has links)
Typescript. / Thesis (Ph. D.)--University of Hawaii, 1971. / Bibliography: leaves 216-232. / xx, 232 l illus., tables
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The effect of chronic estrogen administration on the cytology, hormone secretion and proteinase activity of the rat anterior pituitary glandClifton, Kelly Hardenbrook, January 1955 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1955. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
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A study of the relationship between the pituitary gland and natural sex reversal in the ricefield eel, Monopterus albus (Zuiew)柯慧心, O, Wai-sum. January 1973 (has links)
published_or_final_version / Zoology / Master / Master of Philosophy
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The adenohypophyseal cell types and their relationships to reproduction in the soft-shelled turtle, Trionyx sinensis WiegmYip, Din-yan, 葉殿恩 January 1974 (has links)
published_or_final_version / Zoology / Master / Master of Philosophy
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Role of leptin in regulating the bovine hypothalamic-gonadotropic axisAmstalden, Marcel 30 September 2004 (has links)
The physiological mechanisms through which nutrition mediates its effects in controlling reproduction are not well characterized. Both neural and endocrine components have been implicated in the communication of nutritional status to the central nervous system. Leptin, a hormone synthesized and secreted mainly by adipocytes, is heavily involved in this communication network. The objectives of studies reported herein were 1) to determine the effects of short-term restriction of nutrients on circulating leptin, leptin gene expression in adipose tissue, and leptin receptor (LR) gene expression in the adenohypophysis of ovariectomized cows; and 2) to investigate the responsiveness of the hypothalamic-adenohypophyseal (AP) axis of fasted and non-fasted cattle to leptin. Studies demonstrated that circulating concentrations of leptin and leptin gene expression in subcutaneous adipose tissue are decreased by fasting. Although 2 to 3 days of fasting did not affect patterns of release of luteinizing hormone (LH), cerebroventricular infusions of leptin increased mean circulating concentrations of LH in fasted, but not normal-fed cows, without affecting frequency or amplitude of pulses of LH. In vitro studies were conducted to determine whether the in vivo effects of leptin could be accounted for at the hypothalamic and/or AP levels. Leptin did not affect the release of gonadotropin-releasing hormone (GnRH) from hypothalamic-infundibular explants from either normal-fed or fasted cattle. Moreover, leptin did not affect the basal release of LH from bovine AP cells or AP explants from normal-fed cows. However, leptin induced a higher basal release of LH from AP explants of fasted cows and increased GnRH-stimulated release of LH from AP explants of normal-fed cows. Results demonstrate that leptin acts directly at the AP level to modulate the secretion of LH, and its effects are dependent upon nutritional status. Cellular mechanisms associated with the increased responsiveness of gonadotropes to leptin in fasted cows were investigated. Expression of LR and suppressor of cytokine signaling-3 (SOCS-3) in the adenohypophysis did not account for the increased responsiveness of fasted cows to leptin. Therefore, although leptin clearly stimulates the hypothalamic-gonadotropic axis in nutrient-restricted cattle, it is unclear why cattle maintained under neutral or positive energy balance are resistant to leptin.
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Role of leptin in regulating the bovine hypothalamic-gonadotropic axisAmstalden, Marcel 30 September 2004 (has links)
The physiological mechanisms through which nutrition mediates its effects in controlling reproduction are not well characterized. Both neural and endocrine components have been implicated in the communication of nutritional status to the central nervous system. Leptin, a hormone synthesized and secreted mainly by adipocytes, is heavily involved in this communication network. The objectives of studies reported herein were 1) to determine the effects of short-term restriction of nutrients on circulating leptin, leptin gene expression in adipose tissue, and leptin receptor (LR) gene expression in the adenohypophysis of ovariectomized cows; and 2) to investigate the responsiveness of the hypothalamic-adenohypophyseal (AP) axis of fasted and non-fasted cattle to leptin. Studies demonstrated that circulating concentrations of leptin and leptin gene expression in subcutaneous adipose tissue are decreased by fasting. Although 2 to 3 days of fasting did not affect patterns of release of luteinizing hormone (LH), cerebroventricular infusions of leptin increased mean circulating concentrations of LH in fasted, but not normal-fed cows, without affecting frequency or amplitude of pulses of LH. In vitro studies were conducted to determine whether the in vivo effects of leptin could be accounted for at the hypothalamic and/or AP levels. Leptin did not affect the release of gonadotropin-releasing hormone (GnRH) from hypothalamic-infundibular explants from either normal-fed or fasted cattle. Moreover, leptin did not affect the basal release of LH from bovine AP cells or AP explants from normal-fed cows. However, leptin induced a higher basal release of LH from AP explants of fasted cows and increased GnRH-stimulated release of LH from AP explants of normal-fed cows. Results demonstrate that leptin acts directly at the AP level to modulate the secretion of LH, and its effects are dependent upon nutritional status. Cellular mechanisms associated with the increased responsiveness of gonadotropes to leptin in fasted cows were investigated. Expression of LR and suppressor of cytokine signaling-3 (SOCS-3) in the adenohypophysis did not account for the increased responsiveness of fasted cows to leptin. Therefore, although leptin clearly stimulates the hypothalamic-gonadotropic axis in nutrient-restricted cattle, it is unclear why cattle maintained under neutral or positive energy balance are resistant to leptin.
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A study of the relationship between the pituitary gland and natural sex reversal in the ricefield eel, Monopterus albus (Zuiew).O, Wai-sum. January 1900 (has links)
Thesis (M. Sc.)--University of Hong Kong, 1974. / Typescript.
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The adenohypophyseal cell types and their relationships to reproduction in the soft-shelled turtle, Trionyx sinensis Wiegm.Yip, Din-yan, January 1974 (has links)
Thesis (M. Phil.)--University of Hong Kong, 1974. / Typewritten.
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Cellular analysis by atomic force microscopy : a thesis presented for the degree of Doctor of Philosophy in Electrical and Computer Engineering, University of Canterbury, Christchurch, New Zealand /Muys, James J. January 1900 (has links)
Thesis (Ph. D.)--University of Canterbury, 2006. / Typescript (photocopy). "November 2006." Includes bibliographical references (p. [153]-161). Also available via the World Wide Web.
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Breeding and non breeding seasons in the bank vole, Clethrionomys glareolus, with special reference to changes in the adenohypophysisGreig, Fennella January 1968 (has links)
No description available.
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