FASORACETAM (aka NS-105 or LAM-105) is "a high-potency nootropic drug of the racetam family."
- Wikipedia Article (There is one sentence in the article...)
There is not much in the literature about this racetam, but I will share what little I can find.
Any speculation about structural activity relationship is very welcome!!
First thing I feel a compulsion to do would be to switch out that cyclohexane with a phenyl group
There is not much info under "Fasoracetam" all I could find was:
Dr. Hakonarson’s talk highlighted his work with a fasoracetam, adrug that was originally developed by the Japanese pharmaceuticalcompany Nippon Shinyaku to treat Alzheimer’s disease but, afterbeing put through clinical trials, was shelved for efficacy reasons.Dr. Hakonarson and his team are currently investigating whether fasoracetam could be used to treat ADHD, a project he called a“representation of what genomics is offering."
- Then there is this: http://cpfd.cnki.com...01110003025.htm
Which is in Chinese and mentions it being in phase 2 trials but seems to only detail its synthesis, I think.
- There is a paywalled article with no abstract http://link.springer...?no-access=true
- It looks to be racemic, and this enantiomer is being sold wheras otherwise it is just the racemic form
until I realized its other name is NS-105... see below
RESOURCES
STUDIES
- Pharmacokinetics of NS-105 (1999)
- Role of metabotropic glutamate receptor subclasses in modulation of adenylyl cyclase activity by a nootropic NS-105.
- "In rat cerebrocortical membranes, the inhibitory action of NS-105 (0.1 microM) on forskolin-stimulated cAMP formation was blocked by a group II mGlu receptor antagonist, (+/-)-alpha-ethylglutamic acid, and by a group III antagonist, (+)-2-amino-2-methyl-4-phosphonobutanoic acid (MAP-4), but not by a group I antagonist, (+/-)-1-aminoindan-1,5-dicarboxylic acid (AIDA), whereas the facilitation of cAMP formation by NS-105 (1 microM"
-This study suggests Fasoracetam is possibly an mGluR 2/3 agonist or PAM?
- "In rat cerebrocortical membranes, the inhibitory action of NS-105 (0.1 microM) on forskolin-stimulated cAMP formation was blocked by a group II mGlu receptor antagonist, (+/-)-alpha-ethylglutamic acid, and by a group III antagonist, (+)-2-amino-2-methyl-4-phosphonobutanoic acid (MAP-4), but not by a group I antagonist, (+/-)-1-aminoindan-1,5-dicarboxylic acid (AIDA), whereas the facilitation of cAMP formation by NS-105 (1 microM"
- Clarification for previous study.! A novel cognition enhancer NS-105 modulates adenylate cyclase activity through metabotropic glutamate receptors in primary neuronal culture.
- Conversely, in pertussis toxin-pretreated neurons, NS-105 (10(-7)-10(-5) M) significantly enhanced the forskolin-stimulated cyclic AMP formation, and this action was completely reversed by cholera toxin.
- These findings suggest that NS-105 stimulates metabotropic glutamate receptor subclasses that are coupled both negatively and positively to adenylate cyclase, but it acts as an antagonist at the receptor subclasses that are linked to phosphoinositides hydrolysis.
It Modulates cAMP
- Conversely, in pertussis toxin-pretreated neurons, NS-105 (10(-7)-10(-5) M) significantly enhanced the forskolin-stimulated cyclic AMP formation, and this action was completely reversed by cholera toxin.
- Involvement of cholinergic and GABAergic systems in the reversal of memory disruption by NS-105, a cognition enhancer.
- "NS-105 showed antiamnestic actions in a variety of animal models of cholinergic dysfunction employed in this study.
- NS-105 (10 mg/kg) showed the increase of ACh release from the cerebral cortex and the enhancement of HACU (so coluracetam is NOT the only HACU enhancer) both in the cerebral cortex and hippocampus
- NS-105 also reversed memory disruption induced by baclofen, a potent GABA(B) receptor agonist, but all of reference drugs did not. These results suggest that antiamnestic action of NS-105 is due to the facilitation of cholinergic neuronal activity and the suppression of GABA(B) receptor-mediated responses."
- Effect of a novel cognition enhancer NS-105 on learned helplessness in rats: possible involvement of GABA(B) receptor up-regulation after repeated treatment.
- "Biochemical data showed that repeated administration of NS-105 increased the number of GABA(B) receptors in rat cerebral cortex without affecting the binding properties of beta-adrenoceptors and 5-HT2 receptors. In contrast to other antidepressants, NS-105 did not inhibit monoamine uptake in vitro, nor did it change monoamine concentrations in brain tissues or extracellular fluids. These findings suggest that NS-105, which lacks an effect on monoaminergic systems, has potent antidepressant activity, which may involve up-regulation of GABA(B) receptors after repeated administration."
- **In theory... Fasoracetam may reverse phenibut/baclofen/GHB/GBL tolerance, and its withdrawal could be the opposite of the aforementioned chemicals. This means fasoracetam will not be acutely anxiolytic but will likely induce anxiolysis with long-term administration. Awesome! I have been looking for a compound like this for years!
- "Biochemical data showed that repeated administration of NS-105 increased the number of GABA(B) receptors in rat cerebral cortex without affecting the binding properties of beta-adrenoceptors and 5-HT2 receptors. In contrast to other antidepressants, NS-105 did not inhibit monoamine uptake in vitro, nor did it change monoamine concentrations in brain tissues or extracellular fluids. These findings suggest that NS-105, which lacks an effect on monoaminergic systems, has potent antidepressant activity, which may involve up-regulation of GABA(B) receptors after repeated administration."
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It also seems to have a ridiculously short half life. Perhaps it has active metabolites, though.
It is frequently mentioned in studies alongside Piracetam, Phenylpiracetam, Nebracetam, Rolziracetam, Nefiracetam, Levetiracetam, Etiracetam, Pramiracetam, Oxiracetam, Luracetam, Aniracetam, Coluracetam, Brivaracetam, Seletracetam, and Rolipram. (There are some leads in this list )
In summary, this guy looks highly promising for specific purposes. However, more studies are really needed, and the toxicity information I could (not) find was paygated. Small adjustments to the molecule could be made to enhance its beneficial properties and greatly increase its half life.
Edited by katuskoti, 28 March 2014 - 12:35 AM.