Huntington's disease: pathogenesis to animal models.

Area of Science:

• Neuroscience
• Genetics
• Pathophysiology

Background:

• Huntington's disease (HD) is an inherited neurodegenerative disorder characterized by cognitive and motor deficits.
• It results from an expanded CAG repeat in the huntingtin gene, leading to progressive striatal and cortical neurodegeneration.
• The precise pathogenic mechanisms of mutant huntingtin remain incompletely understood, driving ongoing research.

Purpose of the Study:

• To review the pathophysiology and contributing cascades in Huntington's disease.
• To identify potential drug targets for therapeutic intervention.
• To examine the role and limitations of animal models in HD research.

Main Methods:

• Literature review of Huntington's disease pathophysiology.
• Analysis of proposed pathogenic mechanisms including excitotoxicity, apoptosis, and oxidative stress.
• Evaluation of various therapeutic targets and animal models.

Main Results:

• Oxidative stress and mitochondrial dysfunction are implicated in HD pathogenesis.
• Multiple neurotransmitter systems (dopaminergic, GABAergic, glutamatergic) and pathways are potential drug targets.
• Animal models are crucial for studying HD mechanisms and testing therapies, each with unique strengths and weaknesses.

Conclusions:

• Understanding the complex pathophysiology of HD is crucial for developing effective treatments.
• Targeting pathways like oxidative stress, mitochondrial function, and neurotransmitter systems offers potential therapeutic avenues.
• Continued research using diverse animal models is essential for unraveling HD mechanisms and identifying novel drug targets.