Abstract:
:Growth factors are major signaling agents regulating neuron-glia dialogue. Epidermal growth factor (EGF), basic fibroblast growth factor (bFGF), insulin growth factor-I (IGF-I) and insulin (INS) induce neuronal and astroglial cell proliferation and differentiation. This is true also for estrogens that influence astrocytes and exert neuroprotectant activity. In this study interactions between growth factors and estradiol on DNA labeling and glial fibrillary acidic protein (GFAP) and vimentin expression in cultured astrocytes were investigated. DNA labeling was significantly stimulated by bFGF pretreatment followed by 24 h estradiol and EGF or IGF-I or INS added in the last 12 h. Western blotting showed also a modulation of GFAP and vimentin expression in treated astrocytes. This suggests the occurrence of a crucial growth factor-estradiol interaction on DNA labeling and cytoskeletal protein expression during astrocyte proliferation and differentiation in culture.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Avola R,Mignini F,Mazzone V,Fisichella A,Zaccheo D,Tomassoni Ddoi
10.1016/j.neulet.2004.01.024keywords:
subject
Has Abstractpub_date
2004-04-01 00:00:00pages
177-80issue
3eissn
0304-3940issn
1872-7972pii
S0304394004000771journal_volume
358pub_type
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