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Botulinum toxin type A in motor nervous system: unexplained observations and new challenges

  • Neurology and Preclinical Neurological Studies - Review Article
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Abstract

In the motor system, botulinum toxin type A (BoNT/A) actions were classically attributed to its well-known peripheral anticholinergic actions in neuromuscular junctions. However, the enzymatic activity of BoNT/A, assessed by the detection of cleaved synaptosomal-associated protein 25 (SNAP-25), was recently detected in motor and sensory regions of the brainstem and spinal cord after toxin peripheral injection in rodents. In sensory regions, the function of BoNT/A activity is associated with its antinociceptive effects, while in motor regions we only know that BoNT/A activity is present. Is it possible that BoNT/A presence in central motor nuclei is without any function? In this brief review, we analyze this question. Limited data available in the literature warrant further investigations of BoNT/A actions in motor nervous system.

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Acknowledgments

This work was supported by Project No. HR.3.2.01-0178 (to Ivica Matak) and project of Croatian National Foundation (HRZZ) No. O-1259-2015 (to Zdravko Lacković).

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Correspondence to I. Matak.

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Matak, I., Lacković, Z. & Relja, M. Botulinum toxin type A in motor nervous system: unexplained observations and new challenges. J Neural Transm 123, 1415–1421 (2016). https://doi.org/10.1007/s00702-016-1611-9

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  • DOI: https://doi.org/10.1007/s00702-016-1611-9

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