pridopidine used in Huntingtons chorea but no clinical results in also:
Pridopidine is a highly selective Sigma-1 receptor (S1R) agonist developed by Prilenia for the treatment of neurodegenerative and neurodevelopmental disorders. S1R regulates key cellular pathways, commonly impaired in neurodegeneration. Of particular interest is its role in the pathogenesis of ALS which is supported by human genetic and postmortem studies as well as by preclinical models. Pridopidine demonstrates robust neuroprotective effects in numerous preclinical models of neurodegenerative diseases including models of ALS. Compelling preclinical data supports the therapeutic potential of pridopidine in ALS. In ALS SOD1G93A motor neurons (MNs), pridopidine exerts neuroprotective effects via activation of the S1R. Specifically, pridopidine increases MN survival, improves BDNF and GDNF axonal transport, and restores the neuro-muscular junction (NMJ) synaptic activity. In vivo, pridopidine treatment of SOD1G93A mice reduces toxic protein aggregates and ameliorates muscle fiber wasting.Clinical support for the validity of the S1R as a potential target for ALS can be derived from a prior trial using a non-selective S1R agonist, showing S1R activation may enhance bulbar and speech function in ALS patients. Pridopidine in vivo target engagement in humans is validated by PET imaging, providing support of the optimal clinical dose. Prior clinical data with pridopidine demonstrates a favorable safety and tolerability profile and provides evidence for a beneficial effect on functional outcome in another neurodegenerative disease.
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