Basic Science and Pathogenesis.

Area of Science:

• Neuroscience
• Molecular Biology
• Pharmacology

Background:

• Lithium salts are established treatments for psychiatric disorders and Alzheimer's disease.
• Lithium exhibits neuroprotective effects by inhibiting apoptosis, regulating autophagy, and enhancing mitochondrial function.
• Understanding lithium's molecular mechanisms at different doses is crucial for optimizing therapeutic strategies.

Purpose of the Study:

• To compare biological processes and pathways affected by different lithium doses (0.02mM, 0.2mM, 2mM) in embryonic hippocampal neurons.
• To integrate gene and protein expression data to elucidate lithium's dose-dependent effects.
• To identify specific cellular mechanisms influenced by varying lithium concentrations.

Main Methods:

• Primary hippocampal neurons from Wistar rat embryos were treated with lithium (0.02mM, 0.2mM, 2mM).
• Gene expression was analyzed using microarray, and protein expression was detected using proteomics.
• Data integration with STRING protein interaction networks identified affected biological processes.

Main Results:

• All lithium doses affected mitochondria, ribosome, and proteasome pathways.
• Specific processes like mitochondrial respiration, energy production, and apoptosis were enriched at different doses.
• Low lithium doses primarily affected cytoplasmic/organelle functions, while high doses influenced nuclear activity.

Conclusions:

• Lithium exhibits a dose-dependent effect on neuronal pathways.
• 0.02mM lithium impacted degradation pathways, 0.2mM affected energy metabolism, and 2mM influenced nuclear functions.
• These findings clarify the specific roles of different lithium doses in neuronal processes.