Botulinum toxin A injection into the entopeduncular nucleus improves dynamic locomotory parameters in hemiparkinsonian rats

Autoři: Adrianna R. Tsang aff001;  Nagalingam Rajakumar aff002;  Mandar S. Jog aff001
Působiště autorů: Department of Physiology and Pharmacology, Western University, London, Ontario, Canada aff001;  Department of Anatomy and Cell Biology, Western University, London, Ontario, Canada aff002;  Department of Clinical Neurological Sciences, London Health Sciences Centre, London, Ontario, Canada aff003
Vyšlo v časopise: PLoS ONE 14(10)
Kategorie: Research Article
doi: 10.1371/journal.pone.0223450


Parkinson’s disease is associated with hyperactivity of the subthalamic nucleus (STN), contributing to motor and gait disturbances. Although deep brain stimulation of the STN alleviates certain motor dysfunction, its specific effect on gait abnormalities remains controversial. This study investigated the long-term changes in locomotion following direct infusions of botulinum toxin-A into the globus pallidus internal segment (GPi) to suppress the flow of information from the STN to the GPi in a hemiparkinsonian rat model. Static and dynamic gait parameters were quantified using a CatWalk apparatus. Interestingly, botulinum toxin-A at 0.5 ng significantly reduced only the dynamic gait parameters of hemiparkinsonian rats at 1 week and 1 month post-infusion, while static gait parameters did not change. This study offers new insights into the complexity of basal ganglia in locomotor control and shows the potential of central infusion of botulinum toxin-A as a novel intervention in the study of experimental hemiparkinson’s disease.

Klíčová slova:

Biological locomotion – Dopaminergics – Gait analysis – Parkinson disease – Rodents – Statistical data – Walking – Levodopa


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