Evidence map›Paper›PMID 23748856›Full record

ArticleAnesthesiology2013

13C NMR metabolomic evaluation of immediate and delayed mild hypothermia in cerebrocortical slices after oxygen-glucose deprivation.

Jia Liu, Mark R Segal, Mark J S Kelly, Jeffrey G Pelton, Myungwon Kim, Thomas L James, Lawrence Litt

Open access · bronzeAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Anesthesiology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
2.5field-weighted citation impact, top 10% 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

6 citing papers in PubMed, 13 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 2 institutions in 1 country.

Jia Liu* Research Associate, ‖ Visiting Professor, ** Professor, The Department of Anesthesia and Perioperative Care, † Professor, The Department of Epidemiology and Biostatistics, ‡ Research Associate Professor, # Professor, The Department of Pharmaceutical Chemistry, The University of California San Francisco, San Francisco, California. § NMR Spectroscopist and Laboratory Manager, QB3 Physical Biosciences Division, Lawrence Berkeley National Laboratory, The University of California, Berkeley, California.
Mark R Segal
Mark J S Kelly
Jeffrey G Pelton
Myungwon Kim
Thomas L James
Lawrence Litt
Marymount University · USCancer Research And Biostatistics · US

Funding

Proposal for Central California 900 MHZ NMR SpectrometerP41GM068933 · NIGMS · UNIVERSITY OF CALIFORNIA BERKELEY · PI WEMMER, DAVID E · 2003 to 2007
$5.9M
NMR OF FBP PROTECTION IN HYPOXIC RAT BRAIN SLICESR01GM034767 · NIGMS · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI LITT, LAWRENCE · 1989 to 2012
$4.0M
NIGMS NIH HHS P41 GM068933NIGMS NIH HHS R01 GM034767
6 · The paper itself

Abstract

backgroundMild brain hypothermia (32°-34°C) after human neonatal asphyxia improves neurodevelopmental outcomes. Astrocytes but not neurons have pyruvate carboxylase and an acetate uptake transporter. C nuclear magnetic resonance spectroscopy of rodent brain extracts after administering [1-C]glucose and [1,2-C]acetate can distinguish metabolic differences between glia and neurons, and tricarboxylic acid cycle entry via pyruvate dehydrogenase and pyruvate carboxylase.

methodsNeonatal rat cerebrocortical slices receiving a C-acetate/glucose mixture underwent a 45-min asphyxia simulation via oxygen-glucose-deprivation followed by 6 h of recovery. Protocols in three groups of N=3 experiments were identical except for temperature management. The three temperature groups were: normothermia (37°C), hypothermia (32°C for 3.75 h beginning at oxygen--glucose deprivation start), and delayed hypothermia (32°C for 3.75 h, beginning 15 min after oxygen-glucose deprivation start). Multivariate analysis of nuclear magnetic resonance metabolite quantifications included principal component analyses and the L1-penalized regularized regression algorithm known as the least absolute shrinkage and selection operator.

resultsThe most significant metabolite difference (P<0.0056) was [2-C]glutamine's higher final/control ratio for the hypothermia group (1.75±0.12) compared with ratios for the delayed (1.12±0.12) and normothermia group (0.94±0.06), implying a higher pyruvate carboxylase/pyruvate dehydrogenase ratio for glutamine formation. Least Absolute Shrinkage and Selection Operator found the most important metabolites associated with adenosine triphosphate preservation: [3,4-C]glutamate-produced via pyruvate dehydrogenase entry, [2-C]taurine-an important osmolyte and antioxidant, and phosphocreatine. Final principal component analyses scores plots suggested separate cluster formation for the hypothermia group, but with insufficient data for statistical significance.

conclusionsStarting mild hypothermia simultaneously with oxygen-glucose deprivation, compared with delayed starting or no hypothermia, has higher pyruvate carboxylase throughput, suggesting that better glial integrity is one important neuroprotection mechanism of earlier hypothermia.

Indexed as

Hypothermia, InducedAcetatesAdenosine DiphosphateAdenosine TriphosphateAnimalsBiomarkersBody TemperatureBrain ChemistryCerebral CortexFemaleGlial Fibrillary Acidic ProteinGlucoseHypoxia, BrainIn Vitro TechniquesMagnetic Resonance SpectroscopyMaleAcetatesAdenosine DiphosphateAdenosine TriphosphateBiomarkersGlial Fibrillary Acidic ProteinGlucosePhosphocreatineTricarboxylic Acids

Identifiers

PMID23748856
PMCPMC3890426
OpenAlexW2007538253

What OpenQuestion holds

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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.