Evidence map›Paper›PMID 23421676›Full record

ArticleACS chemical neuroscience2013

Key binding interactions for memantine in the NMDA receptor.

Walrati Limapichat, Wesley Y Yu, Emma Branigan, Henry A Lester, Dennis A Dougherty

Open access · greenAbstract read
In one paragraph

Article in ACS chemical neuroscience, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
1.2field-weighted citation impact, top 24% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

23 citing papers in PubMed, 54 citations in OpenAlex.

  1. Review
  2. Article
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  9. Article
  10. Review
  11. Effect of the mGluJournal of neural transmission (Vienna, Austria : 1996) · 2021
    Article
  12. Chaperone Sigma1R and Antidepressant Effect.International journal of molecular sciences · 2020
    Review
  13. Article
  14. Article
  15. Article
  16. Memantine has no effect on KBMC research notes · 2018
    Article
  17. Article
  18. Article
  19. Article
  20. Binding of ArgTX-636 in the NMDA receptor ion channel.Journal of molecular biology · 2015
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 1 institution in 1 country.

Walrati LimapichatDivision of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA.
Wesley Y Yu
Emma Branigan
Henry A Lester
Dennis A Dougherty
California Institute of Technology · US

Funding

PROBING RECEPTOR STRUCTURES WITH UNNATURAL AMINO ACIDSR01NS034407 · NINDS · CALIFORNIA INSTITUTE OF TECHNOLOGY · PI DOUGHERTY, DENNIS A · 1995 to 2016
$3.1M
Probing Receptor Structures with Unnatural Amino AcidsR37NS034407 · NINDS · CALIFORNIA INSTITUTE OF TECHNOLOGY · PI DOUGHERTY, DENNIS A · 2004 to 2010
$2.7M
NINDS NIH HHS NS 34407NINDS NIH HHS R01 NS034407
6 · The paper itself

Abstract

Memantine (Namenda) is prescribed as a treatment for moderate to severe Alzheimer's Disease. Memantine functions by blocking the NMDA receptor, but the key binding interactions between drug and receptor are not fully elucidated. To determine key binding interactions of memantine, we made side-by-side comparisons of IC(50) for memantine and amantadine, a structurally related drug, in the GluN1/GluN2B NMDA receptor. We identified hydrophobic binding pockets for the two methyl groups on memantine formed by the residues A645 and A644 on the third transmembrane helices of GluN1 and GluN2B, respectively. Moreover, we found that while adding two methyl groups to amantadine to produce memantine greatly improves affinity, adding a third methyl group to produce the symmetrical trimethylamantadine diminished affinity. Our results provide a better understanding of chemical-scale interactions between memantine and the NMDA channel, which will potentially benefit the development of new drugs for neurodegenerative diseases involving NMDA receptors.

Indexed as

AmantadineAnimalsBinding SitesExcitatory Amino Acid AntagonistsInhibitory Concentration 50MemantinePatch-Clamp TechniquesProtein Structure, TertiaryRatsReceptors, N-Methyl-D-AspartateXenopus laevisAmantadineExcitatory Amino Acid AntagonistsMemantineNR1A NMDA receptor, ratNR2B NMDA receptorReceptors, N-Methyl-D-Aspartate

Identifiers

PMID23421676
PMCPMC3751542
OpenAlexW2025313286

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.