[Apoptosis in the nervous system]

Area of Science:

• Cell Biology
• Neuroscience
• Molecular Biology

Background:

• Apoptosis (programmed cell death) is a regulated cellular process distinct from necrosis, crucial for development, homeostasis, and eliminating abnormal cells.
• It involves active cellular participation with unique morphological and biochemical features, particularly at the nuclear level.
• Gene regulation of apoptosis varies by tissue but shares a conserved effector phase across species.

Purpose of the Study:

• To review the role of apoptosis in the nervous system.
• To identify genes that promote or inhibit neuronal apoptosis.
• To explore the involvement of apoptosis in neurological diseases and CNS infections.

Main Methods:

• Literature review of apoptosis mechanisms and gene regulation in the nervous system.
• Analysis of gene expression patterns related to apoptosis (e.g., Bax, Bcl-2 family).
• Examination of apoptosis involvement in various neurological conditions like excitotoxicity, hypoxia-ischemia, and neurodegenerative diseases.

Main Results:

• Specific genes promoting (Bax, Bcl-xS) and inhibiting (Bcl-2, Bcl-xL) apoptosis in neurons were identified.
• Trophic factors and Trk receptors modulate neuronal survival.
• Neuron loss via apoptosis is implicated in excitotoxicity, X-ray injury, hypoxia-ischemia, infantile spinal muscular atrophy, and CNS infections.

Conclusions:

• Apoptosis plays a significant role in normal neuronal function and disease.
• Aberrant apoptosis contributes to neuron loss in various neurological disorders and infections.
• Understanding apoptosis pathways is critical for developing therapeutic strategies for neurological diseases.