Evidence map›Paper›PMID 17448638›Full record

ArticleEpilepsy research2007

Optical suppression of seizure-like activity with an LED.

Steven M Rothman, Gavin Perry, Xiao-Feng Yang, Krzysztof Hyrc, Brigitte F Schmidt

Open access · greenAbstract read
In one paragraph

Article in Epilepsy research, 2007. 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
0.6field-weighted citation impact, top 40% 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, 20 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Future of seizure prediction and intervention: closing the loop.Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society · 2015
    Review
  5. Article
  6. Toward new paradigms of seizure detection.Epilepsy & behavior : E&B · 2013
    Review
  7. Article
  8. Article
  9. Review
  10. 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 4 institutions in 1 country.

Steven M RothmanDepartment of Neurology, Hope Center, Washington University School of Medicine, St. Louis, MO 63110, United States. rothman@wustl.edu <rothman@wustl.edu>
Gavin Perry
Xiao-Feng Yang
Krzysztof Hyrc
Brigitte F Schmidt
Hope Center for Neurological Disorders · USImaging Center · USRothman Institute · USWashington University in St. Louis · US

Funding

ZINC AND ISCHEMIC BRAIN INJURYP01NS032636 · NINDS · WASHINGTON UNIVERSITY · PI LEE, JIN-MOO · 1995 to 2010
$13.2M
NEW STRATEGIES FOR NEOCORTICAL EPILEPSYR01NS042936 · NINDS · WASHINGTON UNIVERSITY · PI ROTHMAN, STEVEN MARK · 2003 to 2007
$1.4M
NINDS NIH HHS P01 NS032636NINDS NIH HHS P01 NS NS32636NINDS NIH HHS R01 NS042936NINDS NIH HHS R01 NS42936
6 · The paper itself

Abstract

The therapy of focal epilepsy remains unsatisfactory for as many as 25% of patients. We tested the hypothesis that an efficient, ultraviolet light emitting diode (UV LED), coupled with a newly developed "caged" gamma-aminobutyric acid (GABA), might be capable of terminating "ictal-like" events in cultured murine neurons. GABA was released from BC204, a recently described caged GABA, using a small, ultraviolet (UV) LED. Ictal-like events were provoked by removal of extracellular magnesium. In preliminary control experiments, the concentration of GABA released from our caged compound was dependent upon the strength and duration of the illumination, and readily achieved micromolar (microM) levels that are known to activate tonic, extrasynaptic GABA(A) receptors. Ultraviolet illumination had no effect when BC204 was not present in the perfusate and the currents produced by BC204 were eliminated by picrotoxin. Within a few seconds of UV illumination, BC204 rapidly terminated ictal-like events at low microM concentration. Uncaging of BC204 also blocked the elevation of intracellular calcium induced by seizure-like discharges in our cultures. While much more technical development is clearly required to extend our observations to a more intact preparation, these results suggest the intriguing possibility of constructing an implantable device to "optically suppress" focal human seizures under closed loop control.

Indexed as

AnimalsAnticonvulsantsCalciumCells, CulturedElectrophysiologyEpilepsies, PartialGABA Antagonistsgamma-Aminobutyric AcidHippocampusMiceMicroscopy, FluorescenceNeuronsPicrotoxinSeizuresUltraviolet Rays4-(((2H-1-benzopyran-2-one-7-amino-4-methoxy)carbonyl)amino) butanoic acidAnticonvulsantsCalciumGABA Antagonistsgamma-Aminobutyric AcidPicrotoxin

Identifiers

PMID17448638
PMCPMC2074873
OpenAlexW2032805218

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.