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2015 | 71 | 07 |

Tytuł artykułu

Expression of alpha estrogen receptors in the neurons of the hippocampus in male rabbits

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
The subject of the present paper was to show presence of α estrogen receptors in neurons of hippocampal formation in adult male rabbits. Estrogen hormones perform a crucial role in sex differentiation and reproduction, but also influence a number of brain functions not connected with reproduction. Clinical examinations prove estrogens’ influence on cognitive processes, memory, mood, emotional behavior, pain sensation, mobility, state of balance. Estrogens have a neuroprotecting action, they influence neurons’ length of life and as a result of that, degenerative diseases of the nervous system connected with age. The examinations prove that estrogen substitutive therapy decreases the development rate of Alzheimer and Parkinson’s disease, multiple sclerosis, osteoporosis, depression and migraines. It is thought that estrogen administration in the case of these diseases diminishes intensification of symptoms. In relation to this, it is crucial to learn the mechanisms of hormones’ activity and determine the localization of their receptors. The obtained results indicate that estrogen hormones can influence cognitive processes, learning and memory. Learning the mechanisms of estrogens’ activity and determining which brain structures they influence can be helpful in treating neurodegenerative diseases. In adult rabbit males α estrogen receptors occur in neurons of the hippocampus in cytoplasm as well as cell nucleus. In the examined regions cytoplasmic and cytoplasmic-nuclear reaction predominates.

Słowa kluczowe

Wydawca

-

Rocznik

Tom

71

Numer

07

Opis fizyczny

p.424-427,fig,ref.

Twórcy

autor
  • University Center of Veterinary Medicine, Agricultural University of Cracow, Al. Mickiewicza 24/28, 30-059 Krakow, Poland
  • Department of Animal Anatomy and Histology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin
autor
  • University Center of Veterinary Medicine, Agricultural University of Cracow, Al. Mickiewicza 24/28, 30-059 Krakow, Poland
autor
  • Department of Animal Anatomy and Histology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin
autor
  • Department of Animal Physiology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland

Bibliografia

  • 1. Adams M. M., Smith T. D., Moga D., Gallagher M., Wang Y., Wolfe B. B., Rapp P. R., Morrison J. H.: Hippocampal dependent learning ability correlates with N-methyl-D-aspartate (NMDA) receptor levels in CA3 neurons of young and aged rats. J. Comp. Neurol. 2001, 432, 230-243.
  • 2. Amaral D. G., Witter M. P.: Hippocampal formation, [in:] Paxinos G. (ed): The rat nervous system. Academic Press San Diego 1995, 443-494.
  • 3. Beck T., Lindholm D., Castren E., Wree A.: Brain-derived neurotrophic factor protects against ischemic cell damage in rat hippocampus. J. Cereb. Blood Flow. Metab. 1994, 14, 689-692.
  • 4. Berry B. R., McMahan R., Gallager M.: Spatial learning and memory at defined points of the estrous cycle: Effects on performance of a hippocampal-dependent task. Behav. Neurosci. 1997, 111, 267-274.
  • 5. Blaustein J. D.: Cytoplasmic estrogen receptors in rat brain: immunocytochemical evidence using three antibodies with distinct epitopes. Endocrinology 1992, 131, 1336-1342.
  • 6. Blaustein J. D.: Estrogen receptors in neurons: New subcellular locations and functional implications. Endoc. J. 1994, 2, 249-258.
  • 7. Caba M., Beyer C., Gonzalez-Mariscal G., Morrell J. I.: Immunocytochemical detection of estrogen receptor α in the female rabbit forebrain: Topography and regulation by estradiol. Neuroendocrinology 2003, 77, 208-222.
  • 8. Foy M. R., Xu J., Xie X., Brinton R. D., Thompson R. F., Berger T. W.: 17β estradiol enhances NMDA receptor mediated EPSPs and long-term potentiation. J. Neurophysiol. 1999, 81, 925-929.
  • 9. Girgis M., Wang S. C.: A new stereotaxic atlas of the rabbit brain. W. H. Green, St. Louis, Mo., USA 1981.
  • 10. Hösli E., Hösli L.: Cellular localization of estrogen receptors on neurones in various regions of cultured rat CNS: coexistence with cholinergic and galanin receptors. J. Dev. Neurosc. 1999, 17, 317-330.
  • 11. Ivanova T., Beyer C.: Ontogenetic expression and sex differences of aromatase and estrogen receptor-α/β mRNA in the mouse hippocampus. Cell Tissue Res. 2000, 300, 231-237.
  • 12. Kalita K., Szymczak S., Kaczmarek L.: Non-nuclear estrogen receptor β and α in the hippocampus of male and female rats. Hippocampus 2005, 15, 404-412.
  • 13. Kritzer M. F.: Regional, laminar and cellular distribution of immunoreactivity for ERα and ERβ in the cerebral cortex of hormonally intact, adult male and female rats. Cereb. Cortex. 2002, 12, 116-128.
  • 14. MacLusky N., Clark A. S., Naftolin F., Goldman-Rakic P. S.: Oestrogen formation in the mammalian brain: possible role of aromatase in sexual differentiation of the hippocampus and neocortex. Steroids 1987, 50, 459-474.
  • 15. McEwen B. S., Alves S. E.: Estrogen actions in the central nervous system. Endocr. Rev. 1999, 20, 279-307.
  • 16. Monnier M., Gangloff H.: Atlas of stereotaxic brain research on the conscious rabbit. Elsevier, Amsterdam, The Netherlands 1961.
  • 17. Smith T. D., Adams M. M., Morrison J. H., Gallagher M., Rapp P. R.: Circuitspecific alterations in hippocampal synaptophysin immunoreactivity predict spatial learning impairment in aged rats. J. Neurosci. 2000, 20, 6587-6593.
  • 18. Weiland N. G., Orikasa C., Hayashi S., McEwen B. S.: Distribution and hormone regulation of estrogen receptor immunoreactive cells in the hippocampus of male and female rats. J. Comp. Neurol. 1997, 388, 603-612.
  • 19. Zhang J. Q., Cai W. Q., Zhou S de., Su B. Y.: Distribution and differences of estrogen receptor beta immunoreactivity in the brain of adult male and female rats. Brain Res. 2002, 935, 73-80.

Typ dokumentu

Bibliografia

Identyfikatory

Identyfikator YADDA

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