Evidence map›Paper›PMID 28686657›Full record

Trial reportPloS one2017

Phase I randomized clinical trial of N-acetylcysteine in combination with an adjuvant probenecid for treatment of severe traumatic brain injury in children.

Robert S B Clark, Philip E Empey, Hülya Bayır, Bedda L Rosario, Samuel M Poloyac, Patrick M Kochanek, Thomas D Nolin, Alicia K Au, Christopher M Horvat, Stephen R Wisniewski and 1 more

Registry-linked trialOpen access · goldAbstract readClinical Trial, Phase IRandomized Controlled Trial
In one paragraph

Trial report in PloS one, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT01322009 (Overcoming Membrane Transporters to Improve CNS Drug Delivery), which is not on this map. Cited by 39 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
39citing papers in PubMed, 3 pooled it
5.1field-weighted citation impact, top 4% 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.

NCT01322009 phase1 / phase2completednot on this map

Overcoming Membrane Transporters to Improve CNS Drug Delivery

TypeinterventionalSponsorUniversity of PittsburghRan2011 to 2015Enrolled14ConditionsPediatric Traumatic Brain InjuryArmsProbenecid and N-acetyl cysteine, Placebo
3 · Its place in the literature

Who cites it

39 citing papers in PubMed, 3 syntheses or guidelines pooled it, 54 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Trial
  5. Trial
  6. Review
  7. Redefining the role of the thiol-based agentRSC medicinal chemistry · 2026
    Review
  8. Review
  9. Review
  10. Article
  11. Mitochondrial-targeted therapies in traumatic brain injury: From bench to bedside.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2025
    Review
  12. Review
  13. Review
  14. N-Acetylcysteine and Probenecid Adjuvant Therapy for Traumatic Brain Injury.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2023
    Review
  15. Review
  16. Review
  17. Article
  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

11 authors at 1 institution in 1 country.

Robert S B ClarkDepartment of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America.ORCID http://orcid.org/0000-0002-0806-8005
Philip E EmpeyClinical and Translational Science Institute, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America.
Hülya BayırDepartment of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America.
Bedda L RosarioDepartment of Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America.
Samuel M PoloyacDepartment of Pharmacy and Therapeutics, Center for Clinical Pharmaceutical Sciences, School of Pharmacy, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America.
Patrick M KochanekDepartment of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America.
Thomas D NolinDepartment of Pharmacy and Therapeutics, Center for Clinical Pharmaceutical Sciences, School of Pharmacy, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America.
Alicia K AuDepartment of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America.
Christopher M HorvatDepartment of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America.
Stephen R WisniewskiDepartment of Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America.
Michael J BellDepartment of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America.
University of Pittsburgh · US

Funding

Multiple Medical Therapies for Pediatric TBI; Comparative Effectiveness ApproachU01NS081041 · NINDS · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI BELL, MICHAEL J, WISNIEWSKI, STEPHEN R · 2013 to 2017
$15.9M
University of Pittsburgh Clinical and Translational Science InstitutionKL2TR000146 · NCATS · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI REIS, STEVEN E · 2012 to 2015
$8.7M
PEDIATRIC NEUROINTENSIVE CARE AND RESUSCITATION RESEARCHT32HD040686 · NICHD · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI Robert S B Clark, PATRICK M KOCHANEK · 2000 to 2026
$7.1M
Overcoming Membrane Transporters to Improve CNS Drug TherapyR01NS069247 · NINDS · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI CLARK, ROBERT S B · 2009 to 2013
$2.2M
NCATS NIH HHS KL2 TR000146NICHD NIH HHS T32 HD040686NINDS NIH HHS R01 NS069247NINDS NIH HHS U01 NS081041
6 · The paper itself

Abstract

backgroundThere are no therapies shown to improve outcome after severe traumatic brain injury (TBI) in humans, a leading cause of morbidity and mortality. We sought to verify brain exposure of the systemically administered antioxidant N-acetylcysteine (NAC) and the synergistic adjuvant probenecid, and identify adverse effects of this drug combination after severe TBI in children.

methodsIRB-approved, randomized, double-blind, placebo controlled Phase I study in children 2 to 18 years-of-age admitted to a Pediatric Intensive Care Unit after severe TBI (Glasgow Coma Scale [GCS] score ≤8) requiring an externalized ventricular drain for measurement of intracranial pressure (ICP). Patients were recruited from November 2011-August 2013. Fourteen patients (n = 7/group) were randomly assigned after obtaining informed consent to receive probenecid (25 mg/kg load, then 10 mg/kg/dose q6h×11 doses) and NAC (140 mg/kg load, then 70 mg/kg/dose q4h×17 doses), or placebos via naso/orogastric tube. Serum and CSF samples were drawn pre-bolus and 1-96 h after randomization and drug concentrations were measured via UPLC-MS/MS. Glasgow Outcome Scale (GOS) score was assessed at 3 months.

resultsThere were no adverse events attributable to drug treatment. One patient in the placebo group was withdrawn due to adverse effects. In the treatment group, NAC concentrations ranged from 16,977.3±2,212.3 to 16,786.1±3,285.3 in serum and from 269.3±113.0 to 467.9±262.7 ng/mL in CSF, at 24 to 72 h post-bolus, respectively; and probenecid concentrations ranged from 75.4.3±10.0 to 52.9±25.8 in serum and 5.4±1.0 to 4.6±2.1 μg/mL in CSF, at 24 to 72 h post-bolus, respectively (mean±SEM). Temperature, mean arterial pressure, ICP, use of ICP-directed therapies, surveillance serum brain injury biomarkers, and GOS at 3 months were not different between groups.

conclusionsTreatment resulted in detectable concentrations of NAC and probenecid in CSF and was not associated with undesirable effects after TBI in children.

trial registrationClinicalTrials.gov NCT01322009.

Indexed as

AcetylcysteineAdjuvants, PharmaceuticAdolescentAntioxidantsBiomarkersBody TemperatureBrain Injuries, TraumaticChildChild, PreschoolDouble-Blind MethodDrug Administration ScheduleFemaleGlasgow Coma ScaleGlasgow Outcome ScaleHumansIntracranial PressureAcetylcysteineAdjuvants, PharmaceuticAntioxidantsBiomarkersProbenecid

Identifiers

PMID28686657
PMCPMC5501440
OpenAlexW2731637927

What OpenQuestion holds

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Registered trials

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.