Gonadal Steroid Hormones
Mostrando 1-12 de 23 artigos, teses e dissertações.
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1. Estrogen and progesterone receptors in endometrial polyps of women exposed and not exposed to tamoxifen and in atrophic endometrium / Receptores de estrógeno e progesterona em pólipos endometriais de usuárias e não usuárias de tamoxifeno e no endométrio atrófico
Introduction: Tamoxifen has been used for the treatment of strogen receptor-positive breast cancer. The effect of tamoxifen in breast cancer is the it inhibition cancer cell growth by competitive antagonism with strogen for strogen receptor (ER). The mechanism of action of tamoxifen in this receptor varies among different tissues, with antagonist effect (e.g
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/02/2012
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2. Expressão e reposição estrogenica e androgenica no lobo ventral da prostata de camundongos diabeticos (NOD) frente a terapia insulinica / Androgen and estrogen replacement and expression in the ventral lobe of the prostate of non-obese diabetic mice (NOD) following insulin therapy
Diabetes adversely affects prostate morphology and function through alterations in the hypothalamic-hypophyseal-gonadal axis. Thus, the aims of this study were to characterize morphological, proliferative and immunological features of the prostate of diabetic mice after long term glycemic control and hormonal replacement, and as well as to relate these param
Publicado em: 2009
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3. Parâmetros mecânicos, físicos e químicos na avaliação de mandíbulas de ratos deficientes em esteróides sexuais / Mechanical, physical and chemical parameters in mandible evaluation of sex steroid deficiency rats
The increase in the life expectancy has been raising the occurrence of common degenerative alterations in aging population, as osteoporosis. This systemic disease is also frequent in hypogonadism and affects the bone metabolism, included mandibular bone. The aim of this study was to evaluate how sex steroid deficiency, induced by orchiectomy (ORX) or ovariec
Publicado em: 2009
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4. Modulação hormonal do crescimento prostatico em diferentes etapas do desenvolvimento / Hormonal modulation on the prostatic growth in diferent stages of the development
O controle do crescimento e da função prostática é baseado, numa complexa rede de interações de hormônios esteróides e seus receptores e num intrincado mecanismo de interconversão entre eles. A fisiologia e o crescimento prostático são dependentes também de hormônios peptídicos e fatores de crescimento, além de interações epitélio-estroma.
Publicado em: 2007
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5. Repercussões histopatologicas na prostata ventral do gerbilo da Mongolia (Merinones unguiculatus) apos suplementação por hormonios esteroides
Not informed
Publicado em: 2006
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6. Transport of Steroid Hormones through the Rat Blood-Brain Barrier: PRIMARY ROLE OF ALBUMIN-BOUND HORMONE
These studies were undertaken to investigate (a) the permeability properties of the blood-brain barrier (BBB) to the major gonadal and adrenal steroid hormones, and (b) the role of the binding proteins of plasma (albumin and specific globulins) in the regulation of BBB steroid hormone transport.
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7. Regulation of rat luteinizing hormone subunit messenger ribonucleic acids by gonadal steroid hormones.
Little is known about the hormonal regulation of luteinizing hormone (LH) biosynthesis. We have studied the regulation of LH messenger RNA (mRNA) levels by gonadal-steroid hormones in the rat. In one set of experiments, male and female rats were surgically gonadectomized (GDX) and killed 1, 3, 7, 14, 22, and 31 d postoperatively. In another set of experiment
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8. Male Japanese quails with female brains do not show male sexual behaviors
During embryonic development, gonadal steroid hormones (androgens and estrogens) are thought to organize the sexual differentiation of the brain in the heterogametic sexes of higher vertebrates (males in mammals, females in birds). Brain differentiation of the homogametic sexes is thought to proceed by default, not requiring sex hormones for sex-specific
National Academy of Sciences.
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9. Modulation of cognition-specific cortical activity by gonadal steroids: A positron-emission tomography study in women
There is considerable evidence from animal studies that gonadal steroid hormones modulate neuronal activity and affect behavior. To study this in humans directly, we used H215O positron-emission tomography to measure regional cerebral blood flow (rCBF) in young women during three pharmacologically controlled hormonal conditions spanning 4–5 months: ovarian
National Academy of Sciences.
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10. Trans-seasonal action of androgen in the control of spring courtship behavior in male red-sided garter snakes.
Gonadal steroids have traditionally been found to have short-term effects on the mating behavior of adult vertebrates, such that increased steroid hormone levels influence behavior over the course of a few days. Long-term effects also have been observed in which embryonic exposure to steroid hormone influences the sexual behavior of adults. The generality of
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11. Vitamin D and gonadal steroid-resistant New World primate cells express an intracellular protein which competes with the estrogen receptor for binding to the estrogen response element.
New World primates (NWP) exhibit a form of compensated resistance to vitamin D and other steroid hormones, including 17beta-estradiol. One postulated cause of resistance is that NWP cells overexpress one or more proteins which block hormone action by competing with hormone for its cognate hormone response element. Here we report that both nuclear and postnuc
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12. From behavior to membranes: testosterone-induced changes in action potential duration in electric organs.
The electric organ of mormyrid fishes consists of action potential-generating cells called electrocytes, which together produce a pulse-like electric organ discharge (EOD). The appearance of an EOD depends, in part, on the characteristic features of a single electrocyte's action potentials. In some species, gonadal steroid hormones induce increases in EOD du