Update on current and emerging therapies for dystonia

Area of Science:

• Neurology
• Movement Disorders
• Pharmacology

Background:

• Dystonia is a complex movement disorder with varied symptom presentation.
• Current management strategies are tailored to the specific type and distribution of dystonia.

Purpose of the Study:

• To review current and emerging treatment strategies for dystonia.
• To highlight advancements in chemodenervation, pharmacotherapy, neuromodulation, and gene therapy.

Main Methods:

• Review of existing literature on dystonia treatments.
• Analysis of current clinical practices and ongoing research.
• Inclusion of data on botulinum toxin, oral medications, deep-brain stimulation, and novel therapeutic approaches.

Main Results:

• Botulinum toxin is the primary treatment for focal dystonia and specific body regions.
• Electromyography enhances botulinum toxin injection efficacy and reduces costs.
• Investigational therapies include longer-acting botulinum toxin formulations, novel oral medications (sodium oxybate, zonisamide, perampanel), noninvasive neuromodulation, and gene-targeted therapies.
• Pallidal deep-brain stimulation shows benefit for medication-refractory generalized dystonia and potentially focal dystonia like cervical dystonia.

Conclusions:

• Treatment selection for dystonia is guided by symptom distribution.
• A combination of established and novel therapies, including chemodenervation, pharmacotherapy, neuromodulation, and potentially gene therapy, offers a comprehensive approach to managing dystonia.
• Further research is needed for noninvasive neuromodulation and rehabilitation techniques.