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2007 | 63 | 12 |

Tytuł artykułu

Expression of estrogen receptors alpha in hippocampal astrocytes of ovariectomized female rabbits

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
The aim of the study was to trace the ERα immunoreactivity in the hippocampal astrocytes of ovariectomized rabbits with and without the application of 17β-estradiol. The study comprised sexually mature female rabbits that had undergone ovariectomy. The animals were divided into two experimental groups. Group I comprised of the ovariectomized rabbits and group II . the ovariectomized animals treated with 17β -estradiol. The immunocytochemical reaction was conducted with the application of two antibodies against estrogen receptors a. In the ovariectomized rabbits which did not receive 17β -estradiol the astrocytes were characterized by ERα immunoreactivity. Similarly in group II expression of ERα was found in the hippocampus astrocytes following the application of 17β -estradiol. In astrocytes, these receptors are located in the cell body and initial processes and rarely in cell nuclei. The results suggest that astrocytes are the target cells for estrogens, changing their function and modulating hippocampal neuron activity.

Wydawca

-

Rocznik

Tom

63

Numer

12

Opis fizyczny

p.1551-1553,fig.,ref.

Twórcy

autor
  • Agricultural University, Akademicka 12, 20-033 Lublin, Poland
autor

Bibliografia

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  • 2.Azcoitia I., Sierra A., Garcia-Segura L. M.: Localization of estrogen receptor b immunoreactivity in astrocytes of the adult rat brain. Glia 1999, 26, 260-267.
  • 3.Blaustein J. D.: Estrogen receptors in neurons: new subcellular locations and functional implications. Endocrinol J. 1994, 2, 249-258.
  • 4.Caba M., Beyer C., Gonzáles-Mariscal G., Morrell J. I.: Immunocytochemical detection of estrogen receptor - a in the female rabbit forebrain: topography and regulation by estradiol. Cell Neuroendocrinol. 2003, 77, 208-222.
  • 5.Caldwell J. D.: A sexual arousability model involving steroid effects at the plasma membrane. Neurosci. Behav. Rev. 2002, 26, 13-30.
  • 6.Cybulska R., Jaworska-Adamu J., Wawrzyniak-Gacek A.: Funkcje astrocytów w patogenezie niektórych chorób ośrodkowego układu nerwowego. Medycyna Wet. 1994, 50, 447-449 (in Polish). 7.Dhandapani K. M., Brann D. W.: Estrogen-astrocyte interactions: implications for neuroprotection. BMC Neurosci. 2002, 3, 6.
  • 8.Don Carlos L. L., Monroy E., Morrell J. I.: Distribution of estrogen receptor-immunoreactive cells in the forebrain of the female guinea pig. J. Comp. Neurol. 1991, 305, 591-612.
  • 9.Harkness J. E., Wagner J. E.: The Biology and Medicine of Rabbits and Rodents. Lea and Fibiger, Philadelphia 1977.
  • 10.Hõsli E., Jurasin K., Rûhl W., Lûthy R., Hõsli L.: Colocalization of androgen, estrogen and cholinergic receptors on cultured astrocytes of the rat central nervous system. Int. J. Devl. Neurosci. 2001, 19, 11-19.
  • 11.Hõsli E., Rûhl W., Hõsli L.: Histochemical and electrophysiological evidence for estrogen receptors on cultured astrocytes: colocalization with cholinergic receptors. Int. J. Devl. Neurosci. 2000, 18, 101-111.
  • 12.Jaworska-Adamu J., Cybulska R., Kalinowska M.: Changes of the morphology of astrocytes in periaqueductal gray matter and arcuate nucleus during the estrous cycle in rats. Medycyna Wet. 2004, 60, 1114-1117. (in Polish).
  • 13.Koch M., Ehret G.: Immunocytochemical localization and quantitation of estrogen binding cells in the male and female (virgin, pregnant, lacting) mouse brain. Brain Res. 1989, 489, 101-112.
  • 14.Krakowska I., Jaworska-Adamu J.: Ekspresja receptorów estrogenowych a w zakrêcie przyhipokampowym samic królików po 17b estradiolu. Medycyna Wet. 2006, 62, 1059-1060 (in Polish).
  • 15.Langub M. C., Watson R. E.: Estrogen receptor-immunoreactive glia, endothelia and ependyma in guinea pig preoptic area and median eminence: electron microscopy. Endocrinol. 1992, 130, 364-372.
  • 16.Lehman M. N., Ebling F., Moenter S. M., Karsch F. J.: Distribution of estrogen receptor-immunoreactive cells in the sheep brain. Endocrinol. 1993, 133, 876-886.
  • 17.Li H. H., Blaustein J. D., DeVries G. G., Wade G. N.: Estrogen-receptor immunoreactivity in hamster brain: preoptic area, hypothalamus and amygdala. Brain Res. 1993, 631, 304-312.
  • 18.Luquin S., Naftolin F., Garcia-Segura L. M.: Natural fluctuation and gonadal hormone regulation of astrocytes immunoreactivity in dentate gyrus. J. Neurobiol. 1993, 24, 913-924.
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  • 21.Milner T. A., McEwen B. S., Hayashi S., Li C. J., Reagan L. P., Alves S. E.: Ultrastructural evidence that hippocampal alpha receptors are located at extranuclear sites. J. Comp. Neurol. 2001, 429, 355-371.
  • 22.Mitra S. W., Hoskin E., Yudkovitz J., Pear L., Wilkinson H. A., Hayashi S., Pfaff D. W., Ogawa S., Rohrer S. P., Schaeffer J. M., McEwen B. S., Alves S. E.: Immunolocalization of estrogen receptor b in the mouse brain comparison with estrogen receptor a. Endocrinol. 2003, 144, 2055-2067.
  • 23.Rees H. D., Switz G. M., Michael R. P.: The estrogen-sensitive neural system in the brain of female cats. J. Comp. Neurol. 1980, 193, 789-804.
  • 24.Rune G. M., Wehrenberg U., Prange-Kiel J., Zhou L., Adelmann G., Frotscher M.: Estrogen up-regulates estrogen receptor a and synaptophysin in slice cultures of rat hippocampus. Neurosci. 2002, 1, 167-172.
  • 25.Shughrue P. J., Lane M. V., Merchenthaler I.: Comparative distribution of ER-a and -b messenger RNA in the rat central nervous system. J. Comp. Neurol. 1997, 388, 507-525.
  • 26.VanLeewen F. W., Chouham S., Axelson J. F., Swaab D. F., VanEerdenburg F. J. C. M.: Sex differences in the distribution of estrogen receptors in the septal area and hypothalamus of the domestic pig (Sus scrofa). Neurosci. 1995, 64, 261- -275.

Typ dokumentu

Bibliografia

Identyfikatory

Identyfikator YADDA

bwmeta1.element.agro-article-7162d79c-45b5-42b1-ae63-26c4056fd87c
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