At the same time, western blot analysis and iron staining showed that ACM significantly reduces DMT1−IRE expression as well as neuron iron content.
The similar tendencies of the effects of ACM on L-DOPA-induced neurotoxicity, DMT1−IRE expression and neuron iron content implied that ACM protects neurons from L-DOPA by its ability to inhibit DMT1−IRE expression and ferrous iron uptake.
These findings support a role of L-DOPA in the increased DMT1−IRE expression as well as in the connection of the increased DMT1−IRE with the increased neuron iron content.
Therefore, we investigated the effects of ACM on morphology, Hoechst 33342 staining, viability, neuron iron content and DMT1−IRE expression in the neurons treated with L-DOPA by incubating neurons in ACM with or without different concentrations of L-DOPA for 16 hours.
Thus, at least in certain experimental animals, hypercholesterolemia may somehow favor an actual increase in neuron cholesterol content, one operated mechanism being modulation of the cellular processing of APP (Ghribi, 2008; Schweinzer et al., 2011).
However, unlike the effects of Drp1 loss in DA neurons, mitochondrial content (mitochondrial intensity/cytoplasmic area) was unchanged in CA1 neurons, even in 1-year-old animals.
Neuron window contents are below.
No significant changes in neuron iron contents were observed when neurons were incubated in ACM with L-DOPA (0, 1, 5, 10, 100 or 200 µM) for 16 hours (Figures 5B).
This Glu Gln cycle is important not only for termination of excitatory signals, but also for replenishing neuronal Glu content, as neurons do not express pyruvate carboxylase and are therefore unable to sustain their neurotransmitter pool by net synthesis of Glu.
In many targeted neurons the contents of these vesicles leaks out into cytoplasm where it appears to initiate intraneuronal necrosis and a decrease in the fluorescence intensity of non-vesicular cytosolic GFP, possibly by reactivation of lysosomal hydrolases.
