Abstract：
:Nickel, a known occupational/environmental hazard, may cross the placenta and reach appreciable concentrations in various fetal organs, including the brain. The aim of this study was to investigate whether nickel interferes with the process of neuronal differentiation. Following a 4 week treatment with retinoic acid (10μM), the human teratocarcinoma-derived NTera2/D1 cell line (NT2 cells) terminally differentiate into neurons which recapitulate many features of human fetal neurons. The continuous exposure of the differentiating NT2 cells to a not cytotoxic nickel concentration (10μM) increased the expression of specific neuronal differentiation markers such as neural cell adhesion molecule (NCAM) and microtubule associated protein 2 (MAP2). Furthermore, nickel exposure increased the expression of hypoxia-inducible-factor-1α (HIF-1α) and induced the activation of the AKT/PKB kinase pathway, as shown by the increase of P(Ser-9)-GSK-3β, the inactive form of glycogen synthase kinase-3β (GSK-3β). Intriguingly, by the end of the fourth week the expression of tyrosine hydroxylase (TH) protein, a marker of dopaminergic neurons, was lower in nickel-treated than in control cultures. Thus, likely by partially mimicking hypoxic conditions, a not-cytotoxic nickel concentration appears to alter the process of neuronal differentiation and hinder the expression of the dopaminergic neuronal phenotype. Taken together, these results suggest that nickel, by altering normal brain development, may increase susceptibility to neuro-psychopathology later in life.
journal_name
Neurotoxicologyjournal_title
Neurotoxicologyauthors
Ceci C,Barbaccia ML,Pistritto Gdoi
10.1016/j.neuro.2015.01.001subject
Has Abstractpub_date
2015-03-01 00:00:00pages
47-53eissn
0161-813Xissn
1872-9711pii
S0161-813X(15)00005-4journal_volume
47pub_type
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