Anavex Life Sciences Corp (AVXL)

[georgejjl]

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The Parkinson's disease dimension trial and what we know.

What we know now from the Rett syndrome trial:

Supporting the clinical assessments, plasma levels of the biomarker Glutamate also decreased significantly (Week 0 vs. Week 7; 2-tailed Wilcoxon signed rank test, p = 0.046) and levels of Glutamate at Week 7 were directly correlated with CGI-I scores at Week 7 (2-tailed Spearman’s rho = 0.837, p = 0.038) with greater decreases in Glutamate associated with greater improvement in these efficacy scores.

Glutamate is the main excitatory neurotransmitter in the brain and is known to be higher in patients with Rett syndrome compared to healthy subjects in the brain, as measured by magnetic resonance imaging spectroscopy (MRS), as well as in cerebrospinal fluid (CSF) and blood plasma.

Additionally, the magnitude of GABA change was inversely correlated with the magnitude of decrease in RSBQ Total scores (2-tailed Spearman’s rho = -0.812, p = 0.050) and GABA changes demonstrated an inverse correlation of the magnitude of Glutamate changes (2-tailed Spearman’s rho = -0.829, p = 0.042).

GABA is the main inhibitory neurotransmitter in the brain, known to be deficient in animal models of Rett syndrome. Excitatory-inhibitory imbalances postulated in many neurologic disorders, including Rett syndrome, have been linked to imbalances between Glutamate and GABA

Parkinson's disease is a neurodegenerative disease with motor and non-motor symptoms. In Parkinson's disease, a neurotransmitter imbalance occurs in the extrapyramidal system with a dopamine and GABA deficiency and an acetylcholine and glutamate surplus.

https://www.omicsonline.org/open-access/classical-neurotransmitters-and-neuropeptides-involved-in-parkinsons-disease-a-multineurotransmitter-system-2157-7099.1000266.php?aid=30328

Good luck and GOD bless,