anovulation/tyrosine

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Alterations in reproductive function in SRC tyrosine kinase knockout mice.

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Ingia / Ingia

The role of Src tyrosine kinase in regulating reproductive processes in female mice was investigated using Src wild-type (+/+), heterozygous (+/-), and knockout (-/-) mice. Ovarian Src kinase activity transiently increased in Src +/+ mice following eCG administration. Src knockout mice were

The Influence of LepR Tyrosine Site Mutations on Mouse Ovary Development and Related Gene Expression Changes.

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Ingia / Ingia

Leptin exerts many biological functions, such as in metabolism and reproduction, through binding to and activating the leptin receptor, LepRb, which is expressed in many regions of the brain. To better understand the roles of LepR downstream signaling pathways, Y123F mice, which expressed mutant

Chronic estradiol-17β exposure suppresses hypothalamic norepinephrine release and the steroid-induced luteinizing hormone surge: role of nitration of tyrosine hydroxylase.

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Ingia / Ingia

Chronic exposure to estrogens is known to produce a variety of deleterious effects in women including breast and ovarian cancer and anovulation. In female rats, exposure to low levels of estradiol-17β (E2) decreases hypothalamic norepinephrine (NE) to suppress luteinizing hormone (LH) secretion and

Selective impairment in glycogen synthase kinase-3 and mitogen-activated protein kinase phosphorylation: comparisons with the hyperandrogenic and the hyperinsulinemic rats.

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Ingia / Ingia

OBJECTIVE To characterize and compare the effect of DHEA and insulin plus hCG on ovarian morphology, estrous cycle, hormonal levels, insulin sensitivity, and the regulation of insulin signaling in rats. METHODS Animal model study. METHODS University laboratory. METHODS Female Sprague-Dawley

The role of catecholamines in the etiology of infertility in diabetes mellitus.

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Ingia / Ingia

Patients suffering from diabetes mellitus often develop reproductive dysfunction including anovulation, infertility and disrupted pregnancy. The biochemical basis of these phenomena is yet to be provided. The current study utilizes a neuroendocrine paradigm involving an in vitro microdissection

Identification of differentially expressed genes in pathways of cerebral neurotransmission of anovulatory mice.

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Ingia / Ingia

Polycystic ovary syndrome is the classic example of loss of functional cyclicity and anomalous feedback. In this case, the excessive extra-glandular production and conversion of androgens to estrogens are the pathophysiological basis of the chronic anovulation. The literature describes an

Pharmacological sympathetic denervation prevents the development of polycystic ovarian syndrome in rats injected with estradiol valerate.

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Ingia / Ingia

BACKGROUND The injection of estradiol valerate in female rats induces polycystic ovary syndrome, which is characterized by polycystic ovaries, anovulation, and hyperandrogenism. These characteristics have been associated with an increase in the ovarian concentration of norepinephrine, which occurs

Hypothalamic changes in norepinephrine release in rats with estradiol valerate-induced polycystic ovaries.

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Ingia / Ingia

Chronic anovulation and polycystic ovaries (PCO) can be induced by a single i.m. injection of estradiol valerate (EV, 2 mg in oil) in the rat. Constant exposure to high plasma levels of estradiol provokes a neurotoxic effect on the hypothalamic neurons, including those from the arcuate nucleus.

Angiopoietins/TIE2 system and VEGF are involved in ovarian function in a DHEA rat model of polycystic ovary syndrome.

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Ingia / Ingia

Polycystic ovary syndrome (PCOS) is the most common endocrinological pathology among women of reproductive age. It is characterized by anovulation, oligo- or amenorrhea, hyperandrogenism, obesity, and insulin resistance. PCOS patients present with elevated levels of vascular endothelial growth

An increased intraovarian synthesis of nerve growth factor and its low affinity receptor is a principal component of steroid-induced polycystic ovary in the rat.

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Ingia / Ingia

A form of polycystic ovary (PCO) resembling some aspects of the human PCO syndrome can be induced in rats by a single injection of estradiol valerate (EV). An increase in sympathetic outflow to the ovary precedes, by several weeks, the appearance of cysts, suggesting the involvement of a neurogenic

Enzymatic activities of P450c17 stably expressed in fibroblasts from patients with the polycystic ovary syndrome.

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Ingia / Ingia

Polycystic ovary syndrome (PCOS) is a common endocrine disorder affecting approximately 5-10% of women of reproductive age. The clinical features of PCOS include oligo/anovulation, hyperandrogenemia, and hyperinsulinemia. Because P450c17 is the single enzyme catalyzing both 17alpha-hydroxylase and

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