Endocrine Control Of Reproduction
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Evidências de desregulação endócrina causada pela exposição aquática ao alumínio e ao manganês em Astyanax bimaculatus (Linnaeus, 1758) / Evidences of endocrine disruption caused by aquatic exposure to aluminum and manganese in Astyanax bimaculatus (Linnaeus, 1758)
Metals such as Aluminum (Al) and Manganese (Mn) are found in nature as well as in industrial effluents, and can be toxic to aquatic biota, with endocrine disrupting effects, e.g. for fish, which can affect the reproductive performance of a species. Rivers and tributaries of São Paulo State, even in theoretically preserved areas, have shown an increase in th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/09/2012
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2. Controle do eixo hipotálamo-hipófise-gônadas do surubim do Paraíba Steindachneridion parahybae (Siluriformes:Pimelodidae) em relação ao ciclo reprodutivo e à reprodução induzida em cativeiro / Control of hypothalamus-pituitary-gonad axis of the surubim do Paraíba Steindachneridion parahybae (Siluriformes: Pimelodidae) in relation to reproductive cycle and induced spawning in captivity
Steindachneridion parahybae (Siluriformes) é um bagre de água doce, endêmico da Bacia do Rio Paraíba do Sul (Brasil), e seriamente ameaçado de extinção. Fêmeas de S. parahybae quando criadas em cativeiro apresentam uma falha na maturação final, ovulação e desova. Este trabalho teve como objetivo analisar o eixo hipotálamo-hipófise-gônadas, res
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/08/2011
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3. Evaluation of acute exposure to aluminum and pH variations in the expression of gonadotropins in Oreochromis niloticus (Teleostei: Cichlidae) / Avaliação da exposição aguda ao alumínio e variações do pH na expressão de gonadotropinas em Oreochromis niloticus (Teleostei: Cichlidae)
Aluminum and acidic pH are known to be toxic to the ichthyofauna. The main goal of the present study was to evaluate the effects of aluminum and acidic pH in the reproductive physiology of Oreochromis niloticus. To conduct this experiment, females were exposed to aluminum at 0.5 mg of Al L-1 in neutral pH (Al N), 0.5 mg of Al L-1 in acidic pH (Al - Ac), a co
Publicado em: 2009
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4. Parametros reprodutivos masculinos e fertilidade de ratos adultos expostos ao inseticida fenvalerato / Male reproductive parameters and fertility of adult rats exposed to fenvalerate
Fenvalerate is a synthetic pyrethroid insecticide widely used in agriculture to control a variety of insects. Although it is considered to be of low acute toxicity to mammals, studies have showed that pyrethroids can have estrogenic activity and can act as endocrine disruptors, causing important reproductive impairment in males. It is documented in the liter
Publicado em: 2006
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5. Desenvolvimento reprodutivo de ratos machos expostos ao fenvalerato in utero e lactação / Reproductive development of male rats exposed to fenvalerate in utero and lactation
Fenvalerate is a synthetic pyrethroid insecticide used in agriculture, cattle raising and in the control of domestic insects, and its reproductive effects are little-known.Some studies already have proposed that fenvalerate is an endocrine disruptor, acting as an environmentalestrogen. Studies done with rats exposed to some pyrethroids showed reduction of sp
Publicado em: 2005
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6. The endocrine control of reproduction in Nereidae: a new multi-hormonal model with implications for their functional role in a changing environment
Nereidae are vital to the functioning of estuarine ecosystems and are major components in the diets of over-wintering birds and commercial fish. They use environmental cues to synchronize reproduction. Photoperiod is the proximate cue, initiating vitellogenesis in a temperature-compensated process. The prevailing paradigm in Nereidae is of a single ‘juveni
The Royal Society.
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7. Endocrine-Disrupting Chemicals: An Endocrine Society Scientific Statement
There is growing interest in the possible health threat posed by endocrine-disrupting chemicals (EDCs), which are substances in our environment, food, and consumer products that interfere with hormone biosynthesis, metabolism, or action resulting in a deviation from normal homeostatic control or reproduction. In this first Scientific Statement of The Endocri
The Endocrine Society.
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8. Timing of the Ovarian Circadian Clock Is Regulated by Gonadotropins
The timing of ovulation is critically important to the success of reproduction. Current thinking attributes the timing of ovulation to LH secretion by the pituitary, itself timed by signals from the hypothalamus. The discovery of an internal circadian timer in the ovary raises the possibility that ovulation is in fact timed by an interaction between clocks i
The Endocrine Society.
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9. The Notch Target Gene Hes1 Regulates Cell Cycle Inhibitor Expression in the Developing Pituitary
The pituitary is an endocrine gland responsible for the release of hormones, which regulate growth, metabolism, and reproduction. Diseases such as hypopituitarism or pituitary adenomas are able to disrupt pituitary function leading to suboptimal function of the entire endocrine system. Growth of the pituitary during development and adulthood is a tightly reg
The Endocrine Society.
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10. Phthalate-induced Leydig cell hyperplasia is associated with multiple endocrine disturbances
The possibility that exposures to environmental agents are associated with reproductive disorders in human populations has generated much public interest recently. Phthalate esters are used most commonly as plasticizers in the food and construction industry, and di-(2-ethylhexyl) phthalate (DEHP) is the most abundant phthalate in the environment. Daily human
National Academy of Sciences.
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11. Prenatal androgens alter GABAergic drive to gonadotropin-releasing hormone neurons: Implications for a common fertility disorder
Polycystic ovary syndrome, a fertility disorder affecting ≈7% of women, is characterized by elevated androgens, disrupted reproductive cycles, and high luteinizing hormone, the latter reflecting increased gonadotropin-releasing hormone (GnRH) release. In animal models, a similar reproductive endocrine phenotype occurs after prenatal androgen exposure. To s
National Academy of Sciences.