Alterations in synaptic function and plasticity in Huntington disease.

Area of Science:

• Neuroscience
• Genetics
• Neurodegenerative Disorders

Background:

• Huntington disease (HD) is an inherited neurodegenerative disorder.
• It stems from a CAG repeat expansion in the huntingtin gene's first exon.
• Neurodegeneration begins in the striatum and affects neurotransmission broadly.

Purpose of the Study:

• To review neurochemical mediators and modulators of synaptic transmission disrupted in HD.
• To highlight alterations in neurotransmitters, modulators, and neurotrophic factors.
• To connect synaptic dysfunction to HD pathophysiology and potential treatments.

Main Methods:

• Literature review of neurochemical changes in Huntington disease.
• Analysis of disrupted neurotransmitters (glutamate, GABA).
• Examination of modulators (dopamine, adenosine, endocannabinoids) and neurotrophic factors (BDNF).

Main Results:

• Synaptic transmission is impaired by altered levels and functions of key neurochemicals.
• Disruptions occur in brain regions including the striatum, cortex, and hippocampus.
• These alterations affect synaptic plasticity, behavior, and contribute to HD pathology.

Conclusions:

• Understanding disrupted synaptic pathways in HD offers insights into symptom development.
• Identifying mechanisms of synaptic dysfunction can reveal potential drug targets.
• Further research into synaptic function and plasticity is crucial for HD therapeutics.