Evidence map›Paper›PMID 22222480›Full record

ArticleAnesthesiology2012

Ketamine-induced neuroapoptosis in the fetal and neonatal rhesus macaque brain.

Ansgar M Brambrink, Alex S Evers, Michael S Avidan, Nuri B Farber, Derek J Smith, Lauren D Martin, Gregory A Dissen, Catherine E Creeley, John W Olney

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in Anesthesiology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 157 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
157citing papers in PubMed, 2 pooled it
15.4field-weighted citation impact, top 1% 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

157 citing papers in PubMed, 2 syntheses or guidelines pooled it, 429 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Trial
  5. General Anesthetic Exposure in the Management of Pediatric Subglottic Stenosis.World journal of otorhinolaryngology - head and neck surgery · 2026
    Article
  6. Article
  7. Article
  8. Subcutaneous Buprenorphine Is an Acceptable Preoperative Analgesic in Pregnant Ewes Undergoing Hysterotomy (Ovis aries).Journal of the American Association for Laboratory Animal Science : JAALAS · 2025
    Article
  9. Article
  10. Article
  11. Review
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Article

97 more citing papers are in PubMed but not listed here.

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

9 authors at 1 institution in 1 country.

Ansgar M BrambrinkDepartment of Anesthesiology & Perioperative Medicine, Oregon Health & Science University, Portland, Oregon 97239-3098, USA. brambrin@ohsu.edu
Alex S Evers
Michael S Avidan
Nuri B Farber
Derek J Smith
Lauren D Martin
Gregory A Dissen
Catherine E Creeley
John W Olney
Marymount University · US

Funding

YR 50 PROJ- ROBERTS PRIMATE ISLETP51RR000163 · NCRR · OREGON REGIONAL PRIMATE RESEARCH CENTER · PI OJEDA, SERGIO R · 1985 to 2011
$140.8M
Washington University Intellectual and Developmental Disabilities Research CenterP30HD062171 · NICHD · WASHINGTON UNIVERSITY · PI INDER, TERRIE E · 2010 to 2014
$4.3M
ANESTHESIA TOXICITY IN NEONATAL PRIMATE BRAINR01HD052664 · NICHD · WASHINGTON UNIVERSITY · PI NOGUCHI, KEVIN K · 2007 to 2016
$4.0M
PCP, SIGMA OPIATES, AND GLUTAMERGIC TRANSMISSIONR01DA005072 · NIDA · WASHINGTON UNIVERSITY · PI OLNEY, JOHN W · 1987 to 2010
$3.4M
Acute Brain Injury, Mechanisms and ConsequencesR37HD037100 · NICHD · WASHINGTON UNIVERSITY · PI OLNEY, JOHN W · 2002 to 2011
$3.2M
REPRODUCTIVE STEROIDS AND EXPERIMENTAL STROKEK01RR000163 · NCRR · OREGON HEALTH AND SCIENCE UNIVERSITY · PI MURPHY, STEPHANIE J · 2000 to 2004
$479k
ACUTE BRAIN INJURY, MECHANISMS AND PROTECTIONR01HD037100 · NICHD · WASHINGTON UNIVERSITY · PI OLNEY, JOHN W · 1999 to 2001
$439k
NCRR NIH HHS K01 RR000163NCRR NIH HHS P51 RR000163NCRR NIH HHS RR-000163NICHD NIH HHS HD 052664NICHD NIH HHS HD 062171NICHD NIH HHS HD37100NICHD NIH HHS P30 HD062171NICHD NIH HHS R01 HD037100NICHD NIH HHS R01 HD052664NICHD NIH HHS R37 HD037100NIDA NIH HHS DA 05072NIDA NIH HHS R01 DA005072
6 · The paper itself

Abstract

backgroundExposure of rhesus macaque fetuses for 24 h or neonates for 9 h to ketamine anesthesia causes neuroapoptosis in the developing brain. The current study clarifies the minimum exposure required for and the extent and spatial distribution of ketamine-induced neuroapoptosis in rhesus fetuses and neonates.

methodKetamine was administered by IV infusion for 5 h to postnatal day 6 rhesus neonates or to pregnant rhesus females at 120 days' gestation (full term = 165 days). Three hours later, fetuses were delivered by cesarean section, and the fetal and neonatal brains were studied for evidence of apoptotic neurodegeneration, as determined by activated caspase-3 staining.

resultsBoth the fetal (n = 3) and neonatal (n = 4) ketamine-exposed brains had a significant increase in apoptotic profiles compared with drug-naive controls (fetal n = 4; neonatal n = 5). Loss of neurons attributable to ketamine exposure was 2.2 times greater in fetuses than in neonates. The pattern of neurodegeneration in fetuses was different from that in neonates, and all subjects exposed at either age had a pattern characteristic for that age.

conclusionThe developing rhesus macaque brain is sensitive to the apoptogenic action of ketamine at both a fetal and neonatal age, and exposure duration of 5 h is sufficient to induce a significant neuroapoptosis response at either age. The pattern of neurodegeneration induced by ketamine in fetuses was different from that in neonates, and loss of neurons attributable to ketamine exposure was 2.2 times greater in the fetal than neonatal brains.

Indexed as

AnimalsAnimals, NewbornApoptosisBrainFemaleFetusInfusions, IntravenousKetamineMacaca mulattaNerve DegenerationPregnancyRandom AllocationKetamine

Identifiers

PMID22222480
PMCPMC3433282
OpenAlexW2165399323

What OpenQuestion holds

Textmetadata
LicenceTDM
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.