Evidence map›Paper›PMID 20538611›Full record

ArticleThe Journal of biological chemistry2010

In silico docking and electrophysiological characterization of lacosamide binding sites on collapsin response mediator protein-2 identifies a pocket important in modulating sodium channel slow inactivation.

Yuying Wang, Joel M Brittain, Brian W Jarecki, Ki Duk Park, Sarah M Wilson, Bo Wang, Rachel Hale, Samy O Meroueh, Theodore R Cummins, Rajesh Khanna

Open access · hybridAbstract read
In one paragraph

Article in The Journal of biological chemistry, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed
3.2field-weighted citation impact, top 8% 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

40 citing papers in PubMed, 76 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Review
  5. Article
  6. Anticonvulsant vs. Proconvulsant Effect ofFrontiers in systems neuroscience · 2021
    Article
  7. Article
  8. Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Role of Sodium Channels in Epilepsy.Cold Spring Harbor perspectives in medicine · 2016
    Review
  15. Article
  16. Safety of lacosamide in children with refractory partial epilepsy.Saudi pharmaceutical journal : SPJ : the official publication of the Saudi Pharmaceutical Society · 2015
    Article
  17. Review
  18. Article
  19. Review
  20. 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

10 authors at 4 institutions in 2 countries.

Yuying WangDepartment of Pharmacology and Toxicology, Paul and Carole Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, Indiana 46202, USA.
Joel M Brittain
Brian W Jarecki
Ki Duk Park
Sarah M Wilson
Bo Wang
Rachel Hale
Samy O Meroueh
Theodore R Cummins
Rajesh Khanna
Indiana University – Purdue University Indianapolis · USIndiana University School of MedicineInstitute of Bioinformatics · INUniversity of North Carolina at Chapel Hill · US

Funding

Sodium channels and electrogenesis in sensory neuronsR01NS053422 · NINDS · INDIANA UNIV-PURDUE UNIV AT INDIANAPOLIS · PI CUMMINS, THEODORE R · 2006 to 2019
$4.6M
Small-molecule Inhibition of the Interactions of the Urokinase Receptor: A TargeR01CA135380 · NCI · INDIANA UNIVERSITY INDIANAPOLIS · PI MEROUEH, SAMY · 2009 to 2012
$1.0M
Sodium channels and electrogenesis in sensory neuronsR56NS053422 · NINDS · INDIANA UNIVERSITY INDIANAPOLIS · PI CUMMINS, THEODORE R · 2015 to 2015
$390k
NCI NIH HHS CA135380NCI NIH HHS R01 CA135380NINDS NIH HHS NS053422NINDS NIH HHS R01 NS053422NINDS NIH HHS R56 NS053422
6 · The paper itself

Abstract

The anti-epileptic drug (R)-lacosamide ((2R)-2-(acetylamino)-N-benzyl-3-methoxypropanamide (LCM)) modulates voltage-gated sodium channels (VGSCs) by preferentially interacting with slow inactivated sodium channels, but the observation that LCM binds to collapsin response mediator protein 2 (CRMP-2) suggests additional mechanisms of action for LCM. We postulated that CRMP-2 levels affects the actions of LCM on VGSCs. CRMP-2 labeling by LCM analogs was competitively displaced by excess LCM in rat brain lysates. Manipulation of CRMP-2 levels in the neuronal model system CAD cells affected slow inactivation of VGSCs without any effects on other voltage-dependent properties. In silico docking was performed to identify putative binding sites in CRMP-2 that may modulate the effects of LCM on VGSCs. These studies identified five cavities in CRMP-2 that can accommodate LCM. CRMP-2 alanine mutants of key residues within these cavities were functionally similar to wild-type CRMP-2 as assessed by similar levels of enhancement in dendritic complexity of cortical neurons. Next, we examined the effects of expression of wild-type and mutant CRMP-2 constructs on voltage-sensitive properties of VGSCs in CAD cells: 1) steady-state voltage-dependent activation and fast-inactivation properties were not affected by LCM, 2) CRMP-2 single alanine mutants reduced the LCM-mediated effects on the ability of endogenous Na(+) channels to transition to a slow inactivated state, and 3) a quintuplicate CRMP-2 alanine mutant further decreased this slow inactivated fraction. Collectively, these results identify key CRMP-2 residues that can coordinate LCM binding thus making it more effective on its primary clinical target.

Indexed as

AcetamidesAnimalsBinding SitesCells, CulturedElectrophysiologyEpilepsyImmunoblottingIntercellular Signaling Peptides and ProteinsLacosamideMaleNerve Tissue ProteinsRatsRats, Sprague-DawleySodium ChannelsAcetamidescollapsin response mediator protein-2Intercellular Signaling Peptides and ProteinsLacosamideNerve Tissue ProteinsSodium Channels

Identifiers

PMID20538611
PMCPMC2919092
OpenAlexW1968770896

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.