Nitromemantine

Nitromemantine
Identifiers
  • 3-amino-5,7-diethyladamantan-1-yl nitrate
CAS Number
PubChem CID
UNII
CompTox Dashboard (EPA)
Chemical and physical data
FormulaC14H24N2O3
Molar mass268.357 g·mol−1
3D model (JSmol)
  • N[C@@]12C[C@]3(O[N+]([O-])=O)C[C@@](C2)(CC)C[C@@](C1)(CC)C3

Nitromemantine (developmental code name YQW-36) is a derivative of memantine developed in 2006 for the treatment of Alzheimer's disease. It has been shown to reduce excitotoxicity mediated by over-activation of the glutamatergic system, by blocking NMDA receptors.[1][2]

Pharmacology

Like memantine, nitromemantine is a low-affinity voltage-dependent uncompetitive antagonist at glutamatergic NMDA receptors, however nitromemantine selectively inhibits extrasynaptic NMDA receptors while sparing normal physiological synaptic NMDA receptor activity, resulting in less side effects and a greater neuroprotective action, as well as stimulating regrowth of synapses with prolonged administration. The discoverers of nitromemantine have demonstrated that the amyloid-β peptide associated with Alzheimer's disease acts as an agonist at α7 nicotinic acetylcholine receptors, chronic overstimulation of which then results in uncontrolled release of glutamate, and consequent excitotoxicity. By blocking extrasynaptic NMDA receptors, nitromemantine is able to largely prevent this excitotoxicity while minimising the side effects usually seen with less selective NMDA antagonists.[3] The nitrate group of nitromemantine was found to bind to a second site on the extrasynaptic NMDA receptor which had previously been targeted with nitroglycerin, and this double action is thought to be responsible for the increased effectiveness of nitromemantine.[4]

See also

References

  1. ^ Lipton SA (February 2006). "Paradigm shift in neuroprotection by NMDA receptor blockade: memantine and beyond". Nature Reviews. Drug Discovery. 5 (2): 160–70. doi:10.1038/nrd1958. PMID 16424917. S2CID 21379258.
  2. ^ Nakamura T, Lipton SA (February 2010). "Preventing Ca2+-mediated nitrosative stress in neurodegenerative diseases: possible pharmacological strategies". Cell Calcium. 47 (2): 190–7. doi:10.1016/j.ceca.2009.12.009. PMC 2875138. PMID 20060165.
  3. ^ Talantova M, Sanz-Blasco S, Zhang X, Xia P, Akhtar MW, Okamoto S, et al. (July 2013). "Aβ induces astrocytic glutamate release, extrasynaptic NMDA receptor activation, and synaptic loss". Proceedings of the National Academy of Sciences of the United States of America. 110 (27): E2518-27. Bibcode:2013PNAS..110E2518T. doi:10.1073/pnas.1306832110. PMC 3704025. PMID 23776240.
  4. ^ Lieberman B (June 17, 2013). "Reversing the loss of brain connections in Alzheimer's disease". Beaker. Sanford-Burnham Science Blog.
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