Evidence map›Paper›PMID 24313671›Full record

ArticleEpilepsia2014

Stereoselective anticonvulsant and pharmacokinetic analysis of valnoctamide, a CNS-active derivative of valproic acid with low teratogenic potential.

Tawfeeq Shekh-Ahmad, Naama Hen, Boris Yagen, John H McDonough, Richard H Finnell, Bogdan J Wlodarczyk, Meir Bialer

Abstract read
In one paragraph

Article in Epilepsia, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
4.4field-weighted citation impact, top 6% 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

10 citing papers in PubMed, 25 citations in OpenAlex.

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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

7 authors at 3 institutions in 2 countries.

Tawfeeq Shekh-AhmadFaculty of Medicine, School of Pharmacy, Institute for Drug Research, The Hebrew University of Jerusalem, Jerusalem, Israel.
Naama Hen
Boris Yagen
John H McDonough
Richard H Finnell
Bogdan J Wlodarczyk
Meir Bialer
Hebrew University of Jerusalem · ILThe University of Texas at Austin · USDEVCOM Army Research Laboratory · US

Funding

Natural History and Treatment Response of AVMsK08NS042359 · NINDS · UNIVERSITY OF CALIFORNIA SAN FRANCISCO · PI HALIM, ALEXANDER · 2002 to 2002
$131k
NIH HHS Y01 OD009613NINDS NIH HHS N01-NS-4-2359PHS HHS Y1-O6-9613-01
6 · The paper itself

Abstract

objectiveValnoctamide (VCD), a central nervous system (CNS)-active chiral constitutional isomer of valpromide, the corresponding amide of valproic acid (VPA), is currently undergoing phase IIb clinical trials in acute mania. VCD exhibits stereoselective pharmacokinetics (PK) in animals and humans. The current study comparatively evaluated the pharmacodynamics (PD; anticonvulsant activity and teratogenicity) and PK of the four individual stereoisomers of VCD.

methodsThe anticonvulsant activity of VCD individual stereoisomers was evaluated in several rodent anticonvulsant models including maximal electroshock, 6 Hz psychomotor, subcutaneous metrazol, and the pilocarpine-induced and soman-induced status epilepticus (SE). The PK-PD (anticonvulsant activity) relationship of VCD stereoisomers was evaluated following intraperitoneal administration (70 mg/kg) to rats. Induction of neural tube defects (NTDs) by VCD stereoisomers was evaluated in a mouse strain that was highly susceptible to teratogen-induced NTDs.

resultsVCD had a stereoselective PK, with (2S,3S)-VCD exhibiting the lowest clearance, and consequently a twice-higher plasma exposure than all other stereoisomers. Nervertheless, there was less stereoselectivity in VCD anticonvulsant activity and each stereoisomer had similar median effective dose (ED)50 values in most models. VCD stereoisomers (258 or 389 mg/kg) did not cause NTDs. These doses are 3-12 times higher than VCD anticonvulsant ED50 values. SIGNIFICANCE: VCD displayed stereoselective PK that did not lead to significant stereoselective activity in various anticonvulsant rodent models. If VCD exerted its broad-spectrum anticonvulsant activity using a single mechanism of action (MOA), it is likely that it would exhibit a stereoselective PD. The fact that there was no significant difference between racemic VCD and its individual stereoisomers suggests that VCD's anticonvulsant activity is due to multiple MOAs.

Indexed as

AmidesAnimalsAnticonvulsantsCentral Nervous System StimulantsMaleMiceNeural Tube DefectsRandom AllocationRatsRats, Sprague-DawleyStatus EpilepticusStereoisomerismTeratogensValproic AcidAmidesAnticonvulsantsCentral Nervous System StimulantsTeratogensvalnoctamideValproic AcidChiral switchCNS drugsNew antiepileptic drugsStrereoselective pharmacokinetic and pharmacodynamics analysis

Identifiers

PMID24313671
PMCPMC4963464
OpenAlexW1998041902

What OpenQuestion holds

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Registered trials

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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.