Medial Hypothalamus
Mostrando 13-24 de 74 artigos, teses e dissertações.
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13. A Zona Incerta no sagüi (Callithrix jacchus): Análise Citoarquitetônica, Neuroquímica e Projeção Retiniana
The retinal projections in mammals usually reach, classically, three major functional systems: the primary visual system, the accessory optic system, and the circadian timing system. But the retinal projections also reach areas classically considered non-visual, one of which groups the neurons of the zona incerta (ZI), target this study. The primary visual s
Publicado em: 2008
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14. c-Fos expression induced by electroacupuncture at the Zusanli point in rats submitted to repeated immobilization
In laboratory animals, acupuncture needs to be performed on either anesthetized or, if unanesthetized, restrained subjects. Both procedures up-regulate c-Fos expression in several areas of the central nervous system, representing therefore a major pitfall for the assessment of c-Fos expression induced by electroacupuncture. Thus, in order to reduce the effec
Brazilian Journal of Medical and Biological Research. Publicado em: 2003-12
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15. Nitrergic modulation of vasopressin, oxytocin and atrial natriuretic peptide secretion in response to sodium intake and hypertonic blood volume expansion
The central nervous system plays an important role in the control of renal sodium excretion. We present here a brief review of physiologic regulation of hydromineral balance and discuss recent results from our laboratory that focus on the participation of nitrergic, vasopressinergic, and oxytocinergic systems in the regulation of water and sodium excretion u
Brazilian Journal of Medical and Biological Research. Publicado em: 2002-09
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16. Presence of corticotropin in brain of normal and hypophysectomized rats.
Immunoreactive and bioreactive corticotropin (ACTH-like) activities have been detected in the median eminence and remaining medial basal hypothalamus of both normal and hypophysectomized adult male rats: bioreactive ACTH (pg/100 mug of protein) 1028 in median eminence and 1289 in medial basal hypothalamus; immunoreactive ACTH (midportion ACTH antibody), 1554
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17. Effect of hypothalamic deafferentation on thyrotropin-releasing hormone levels in rat brain.
The medial basal hypothalamus was isolated from the remainder of the brain of the rat using a Halász knife. Ten to 14 days after the surgical procedure the concentration of thyrotropin-releasing hormone within the island of hypothalamic tissue was 76% lower than in tissue from sham-operated control rats. Thus, much of the thyrotropin-releasing hormone that
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18. beta-Lipotropin: localization of cells and axons in rat brain by immunocytochemistry.
Using specific antisera to human beta-lipotropin, we have visualized cells and axons with beta-lipotropin-like immunoreactivity in rat brain and pituitary. The beta-lipotropin so localized is well delineated and contained in the cytoplasm of cells and in beaded axons. Areas of greatest beta-lipotropin content are hypothalamus (with cell bodies in the medial
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19. Acetylcholine, melatonin, and potassium depolarization stimulate release of luteinizing hormone-releasing hormone from rat hypothalamus in vitro.
We have examined the release of radioimmunoassayable luteinizing hormone-releasing hormone (LH-RH) from fragments of rat medial basal hypothalamus. These fragments were cultured overnight in medium containing serum and then preincubated in groups of three for 10 min in medium resembling cerebrospinal fluid in its electrolyte constituents and containing bacit
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20. Melanin-concentrating hormone: unique peptide neuronal system in the rat brain and pituitary gland.
A unique neuronal system was detected in the rat central nervous system by immunohistochemistry and radioimmunoassay with antibodies to salmon melanin-concentrating hormone (MCH). MCH-like immunoreactive (MCH-LI) cell bodies were confined to the hypothalamus. MCH-LI fibers were found throughout the brain but were most prevalent in hypothalamus, mesencephalon
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21. Autoradiographic localization of angiotensin II receptors in rat brain.
The 125I-labeled agonist analog [1-sarcosine]-angiotensin II ( [Sar1]AII) bound with high specificity and affinity (Ka = 2 X 10(9) M-1) to a single class of receptor sites in rat brain. This ligand was used to analyze the distribution of AII receptors in rat brain by in vitro autoradiography followed by computerized densitometry and color coding. A very high
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22. Estradiol differentially regulates lipocalin-type prostaglandin D synthase transcript levels in the rodent brain: Evidence from high-density oligonucleotide arrays and in situ hybridization
Microarrays comprise an efficient approach to discovering large numbers of differentially expressed mRNA transcripts in the CNS resulting from changes in hormonal milieu. We used high-density oligonucleotide microarrays to examine the short- and long-term actions of estradiol (E2) on the transcriptomes from the medial basal hypothalamus and other brain regio
The National Academy of Sciences.
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23. Dorsal Hindbrain 5′-Adenosine Monophosphate-Activated Protein Kinase as an Intracellular Mediator of Energy Balance
The fuel-sensing enzyme AMP-activated protein kinase (AMPK) has been implicated in central nervous system control of energy balance. Hypothalamic AMPK activity is increased by food deprivation, and this elevation is inhibited by refeeding or by leptin treatment. The contribution of extrahypothalamic AMPK activity in energy balance control has not been addres
The Endocrine Society.
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24. Estrogen differentially regulates neuropeptide gene expression in a sexually dimorphic olfactory pathway.
The posterodorsal part of the medial nucleus of the amygdala (MeAp) receives its major sensory input from the accessory olfactory bulb and projects massively to the medial preoptic nucleus and other sexually dimorphic hypothalamic nuclei thought to play key roles in mediating steroid-sensitive reproductive functions. A combined axonal transport/double-immuno