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BibTeX
17β-Estradiol attenuates hyperoxia-induced apoptosis in mouse C8-D1A cell line
Journal of neuroscience research, 2008-11, Vol.86 (15), p.3420-3426
Huppmann, Stephanie
Römer, Susanne
Altmann, Rodica
Obladen, Michael
Berns, Monika
2008
Details
Autor(en) / Beteiligte
Huppmann, Stephanie
Römer, Susanne
Altmann, Rodica
Obladen, Michael
Berns, Monika
Titel
17β-Estradiol attenuates hyperoxia-induced apoptosis in mouse C8-D1A cell line
Ist Teil von
Journal of neuroscience research, 2008-11, Vol.86 (15), p.3420-3426
Ort / Verlag
Hoboken: Wiley Subscription Services, Inc., A Wiley Company
Erscheinungsjahr
2008
Link zum Volltext
Quelle
Wiley Online Library - AutoHoldings Journals
Beschreibungen/Notizen
In premature infants, oxygen free radicals generated following neonatal resuscitation are associated with subsequent diseases such as retinopathy of prematurity and bronchopulmonary dysplasia. Recent studies in brain tissue samples have shown that nonphysiologic oxygen levels play a key role in induction of apoptosis in the developing brain. Estrogen is a well‐established agent in neuroprotection and, therefore, is thought to be neuroprotective even in the premature brain. Astrocytes appear to have a critical role in protection and survival of neurons in the brain. As one of the glial cell types, they have a great potential for possible involvement in the mediation of estrogen neuroprotective effects. The aim of our study was to analyze whether astrocytes in cell cultures are damaged by hyperoxia and whether 17β‐estradiol (E2) can protect them against apoptosis. Additionally, we investigated the mechanism of the protection by E2, hypothesizing that it is mediated through extracellular signal‐regulated kinase (ERK1/2). Cells underwent eightfold more apoptosis when cultivated in hyperoxia compared with normoxia. Addition of E2 reduced apoptosis in hyperoxia by more than 50%. Levels of ERK1/2 and phosphorylated ERK1/2 were increased after hyperoxia compared with normoxia. Preincubation with E2 prior to exposure to hyperoxia resulted in decreased levels of ERK1/2 and pERK1/2. Hyperoxia induces apoptosis in C8‐D1A cells, and E2 seems to be a protecting factor for astrocytes in hyperoxia. This effect is not mediated through up‐regulation of pERK1/2. © 2008 Wiley‐Liss, Inc.
Sprache
Englisch
Identifikatoren
ISSN: 0360-4012
eISSN: 1097-4547
DOI: 10.1002/jnr.21777
Titel-ID: cdi_crossref_primary_10_1002_jnr_21777
Format
–
Schlagworte
astrocytes
,
ERK
,
neuroprotection
,
preterm
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