Neuroprotective effects of estradiol in hippocampal neurons and glia of middle age mice

During aging the hippocampus experiences structural, molecular, and functional alterations. Protection from age-related disorders is provided by several factors, including estrogens. Since aging defects start at middle age, we studied if 17 β-estradiol (E2) protected the hippocampus at this age peri...

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Autor principal: Saravia, F.
Otros Autores: Beauquis, J., Pietranera, L., De Nicola, A.F
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2007
Acceso en línea:Registro en Scopus
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024 7 |2 scopus  |a 2-s2.0-34248586492 
024 7 |2 cas  |a broxuridine, 59-14-3; cholesterol, 57-88-5; doublecortin, 202938-39-4; estradiol, 50-28-2; Estradiol, 50-28-2; Neuroprotective Agents 
040 |a Scopus  |b spa  |c AR-BaUEN  |d AR-BaUEN 
030 |a PSYCD 
100 1 |a Saravia, F. 
245 1 0 |a Neuroprotective effects of estradiol in hippocampal neurons and glia of middle age mice 
260 |c 2007 
270 1 0 |m Saravia, F.; Laboratory of Neuroendocrine Biochemistry, Instituto de Biología y Medicina Experimental, 1428 Buenos Aires, Argentina; email: fsaravia@dna.uba.ar 
506 |2 openaire  |e Política editorial 
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520 3 |a During aging the hippocampus experiences structural, molecular, and functional alterations. Protection from age-related disorders is provided by several factors, including estrogens. Since aging defects start at middle age, we studied if 17 β-estradiol (E2) protected the hippocampus at this age period. Middle age (10-12 month old) male C57Bl/6 mice were implanted sc with E2 (15 μg) or cholesterol pellets. Ten days afterwards they received bromodeoxyuridine (BrdU) 4 and 2 h before killing to study cell proliferation in the dentate gyrus (DG). A pronounced depletion of BrdU+cells in the DG was found in cholesterol-treated middle age mice, accompanied by astrocytosis, and by neuronal loss in the hilus. Middle age mice receiving E2 showed increased number of BrdU+cells while the other parameters were remarkably attenuated. When steroid treatment was prolonged for 2 months to study migration of cells in the granular layer of the DG, cell migration was unaffected by E2. However, E2-treated middle age mice presented higher cell density and increased staining for doublecortin, a marker for differentiating neurons. Thus, from the three basic steps of adult neurogenesis (proliferation, migration, and differentiation), E2 stimulated progenitor proliferation-even after long exposure to E2 studied by Ki67 immunocytochemistry-and differentiation towards a neuronal lineage. This result, in conjunction with recovery from other aging indicators as increased deposits of the aging pigment lipofuscin in DG cells, loss of hilar neurons and astrocytosis supports a wide range protection of hippocampal function of middle age mice by estrogenic hormones. © 2007 Elsevier Ltd. All rights reserved.  |l eng 
536 |a Detalles de la financiación: Universidad de Buenos Aires, M094, M022 
536 |a Detalles de la financiación: National Council for Scientific Research 
536 |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas, PIP 5542 
536 |a Detalles de la financiación: Fondo para la Investigación Científica y Tecnológica, BID 802 OC AR PICT 2000 05-08663 
536 |a Detalles de la financiación: FONCYT (BID 802 OC AR PICT 2000 05-08663), the National Research Council of Argentina (CONICET, PIP 5542) and the University of Buenos Aires (M022 and M094). 
593 |a Laboratory of Neuroendocrine Biochemistry, Instituto de Biología y Medicina Experimental, 1428 Buenos Aires, Argentina 
593 |a Department of Human Biochemistry, Faculty of Medicine, University of Buenos Aires, 1033 Buenos Aires, Argentina 
690 1 0 |a 5-BROMO-2′-DEOXYURIDINE (BRDU) 
690 1 0 |a BRAIN AGING 
690 1 0 |a DENTATE GYRUS 
690 1 0 |a DOUBLECORTIN 
690 1 0 |a ESTRADIOL 
690 1 0 |a GLIAL FIBRILLARY ACIDIC PROTEIN (GFAP) 
690 1 0 |a HILAR NEURONS 
690 1 0 |a KI67 
690 1 0 |a LIPOFUSCIN 
690 1 0 |a NEUROGENESIS 
690 1 0 |a NEUROPROTECTION 
690 1 0 |a BROXURIDINE 
690 1 0 |a CHOLESTEROL 
690 1 0 |a DOUBLECORTIN 
690 1 0 |a ESTRADIOL 
690 1 0 |a ANIMAL CELL 
690 1 0 |a ANIMAL EXPERIMENT 
690 1 0 |a ANIMAL TISSUE 
690 1 0 |a ARTICLE 
690 1 0 |a ASTROCYTOSIS 
690 1 0 |a CELL DENSITY 
690 1 0 |a CELL DIFFERENTIATION 
690 1 0 |a CELL LOSS 
690 1 0 |a CELL MIGRATION 
690 1 0 |a CELL PROLIFERATION 
690 1 0 |a CONTROLLED STUDY 
690 1 0 |a DENTATE GYRUS 
690 1 0 |a GLIA 
690 1 0 |a HIPPOCAMPUS 
690 1 0 |a IMMUNOCYTOCHEMISTRY 
690 1 0 |a MALE 
690 1 0 |a MOUSE 
690 1 0 |a NERVE CELL 
690 1 0 |a NERVOUS SYSTEM DEVELOPMENT 
690 1 0 |a NEUROPROTECTION 
690 1 0 |a NONHUMAN 
690 1 0 |a PRIORITY JOURNAL 
690 1 0 |a STEM CELL 
690 1 0 |a AGING 
690 1 0 |a ANIMALS 
690 1 0 |a CELL DEATH 
690 1 0 |a CELL DIFFERENTIATION 
690 1 0 |a ESTRADIOL 
690 1 0 |a HIPPOCAMPUS 
690 1 0 |a IMMUNOHISTOCHEMISTRY 
690 1 0 |a MALE 
690 1 0 |a MICE 
690 1 0 |a NEUROGLIA 
690 1 0 |a NEURONS 
690 1 0 |a NEUROPROTECTIVE AGENTS 
690 1 0 |a SEX FACTORS 
690 1 0 |a STEM CELLS 
700 1 |a Beauquis, J. 
700 1 |a Pietranera, L. 
700 1 |a De Nicola, A.F. 
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