Evidence map›Paper›PMID 26474857›Full record

ArticleRadiation oncology (London, England)2015

Hippocampal proton MR spectroscopy as a novel approach in the assessment of radiation injury and the correlation to neurocognitive function impairment: initial experiences.

Petr Pospisil, Tomas Kazda, Martin Bulik, Marie Dobiaskova, Petr Burkon, Ludmila Hynkova, Pavel Slampa, Radim Jancalek

Abstract read
In one paragraph

Article in Radiation oncology (London, England), 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

17 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Trial
  4. Review
  5. Review
  6. Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. Review
  12. Article
  13. Review
  14. Article
  15. Role of Ionizing Radiation in Neurodegenerative Diseases.Frontiers in aging neuroscience · 2018
    Review
  16. Review
  17. 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

8 authors.

Petr PospisilDepartment of Radiation Oncology, Faculty of Medicine, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic. ppospisil@mou.cz.
Tomas KazdaDepartment of Radiation Oncology, Faculty of Medicine, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic. tomas.kazda@mou.cz.
Martin BulikInternational Clinical Research Center, St. Anne's University Hospital Brno, Pekarska 53, 656 91, Brno, Czech Republic. martin.bulik@fnusa.cz.
Marie DobiaskovaInternational Clinical Research Center, St. Anne's University Hospital Brno, Pekarska 53, 656 91, Brno, Czech Republic. marie.dobiaskova@fnusa.cz.
Petr BurkonDepartment of Radiation Oncology, Faculty of Medicine, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic. burkon@mou.cz.
Ludmila HynkovaDepartment of Radiation Oncology, Faculty of Medicine, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic. hynkova@mou.cz.
Pavel SlampaDepartment of Radiation Oncology, Faculty of Medicine, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic. slampa@mou.cz.
Radim JancalekDepartment of Neurosurgery - St. Anne's University Hospital Brno, Faculty of Medicine, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic. radim.jancalek@fnusa.cz.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe hippocampus is considered as the main radiosensitive brain structure responsible for postradiotherapy cognitive decline. We prospectively assessed correlation of memory change to hippocampal N-acetylaspartate (h-tNAA) concentration, a neuronal density and viability marker, by (1)H-MR spectroscopy focused on the hippocampus.

methodsPatients with brain metastases underwent whole brain radiotherapy (WBRT) to a dose of 30 Gy in ten fractions daily. Pre-radiotherapy (1)H-MR spectroscopy focused on the h-tNAA concentration and memory testing was performed. Memory was evaluated by Auditory Verbal Learning Test (AVLT) and Brief Visuospatial Memory Test-Revised (BVMT-R). Total recall, recognition and delayed recall were reported. The both investigation procedures were repeated 4 months after WBRT and the h-tNAA and memory changes were correlated.

resultsOf the 20 patients, ten passed whole protocol. The h-tNAA concentration significantly decreased from pre-WBRT 8.9, 8.86 and 8.88 [mM] in the right, left and both hippocampi to 7.16, 7.65 and 7.4 after WBRT, respectively. In the memory tests a significant decrease was observed in AVLT total-recall, BVMT-R total-recall and BVMT-R delayed-recall. Weak to moderate correlations were observed between left h-tNAA and AVLT recognition and all BVMT-R subtests and between the right h-tNAA and AVLT total-recall.

conclusionsA significant decrease in h-tNAA after WBRT was proven by (1)H-MR spectroscopy as a feasible method for the in vivo investigation of radiation injury. Continuing patient recruitment focusing on other cognitive tests and metabolites is needed.

Indexed as

AgedAspartic AcidBiomarkersBrain NeoplasmsCognition DisordersCranial IrradiationFemaleHippocampusHumansKaplan-Meier EstimateMagnetic Resonance SpectroscopyMaleMemoryMiddle AgedNeuropsychological TestsProtonsAspartic AcidBiomarkersN-acetylaspartateProtons

Identifiers

PMID26474857
PMCPMC4609038

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.