Evidence map›Paper›PMID 33383609›Full record

SynthesisNeuroImage. Clinical2020

Meta-analysis of brain metabolite differences in HIV infection.

Lydia Chelala, Erin E O'Connor, Peter B Barker, Thomas A Zeffiro

Open access · goldAbstract readMeta-AnalysisReview
In one paragraph

Synthesis in NeuroImage. Clinical, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 6 pooled it
1.7field-weighted citation impact, top 15% 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

21 citing papers in PubMed, 6 syntheses or guidelines pooled it, 25 citations in OpenAlex.

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  19. Harmonization of multi-scannerFrontiers in neurology · 2022
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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

4 authors at 2 institutions in 1 country.

Lydia ChelalaUniversity of Maryland, School of Medicine, Baltimore, MD, United States.
Erin E O'ConnorUniversity of Maryland, School of Medicine, Baltimore, MD, United States. Electronic address: erin.oconnor@umm.edu.
Peter B BarkerJohns Hopkins University, School of Medicine, Baltimore, MD, United States.
Thomas A ZeffiroUniversity of Maryland, School of Medicine, Baltimore, MD, United States. Electronic address: thomas.zeffiro@som.umaryland.edu.
University of Maryland, Baltimore · USJohns Hopkins University · US

Funding

Cardiovascular and HIV/AIDS Effects on Brain Structure/Function and CognitionR01AG034852 · NIA · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI BECKER, JAMES T. · 2010 to 2020
$9.2M
Mechanism and Predictors of Neurocognitive Impairment in HIV InfectionK23MH118070 · NIMH · UNIVERSITY OF MARYLAND BALTIMORE · PI O'CONNOR, ERIN E · 2020 to 2023
$757k
NIA NIH HHS R01 AG034852NIMH NIH HHS K23 MH118070
6 · The paper itself

Abstract

backgroundNumerous studies have used magnetic resonance spectroscopy (MRS) neurometabolite measurements to study HIV infection effects. While many have reported differences in total N-Acetylaspartate (tNAA), myo-Inositol (mI), and total Choline (tCho), there have been no meta-analyses performed to evaluate concordance across studies. PURPOSE: To evaluate the consistency of HIV serostatus effects on brain metabolites. STUDY SELECTION: The sample included studies conducted between 1993 and 2019 reporting HIV infection effects measured using proton MRS. tNAA/tCr ratios (21 papers), tCho/tCr ratios (21 papers), mI/tCr ratios (17 papers) and quantitative tCr (9 papers), sampling from basal ganglia (BG), gray matter (GM), and white matter (WM) were included. DATA ANALYSIS: Random effects meta-analysis using inverse variance weighting and bias corrected standardized mean differences (SMDs) was used. Meta-regression examined effects of publication year and data acquisition technique differences. DATA SYNTHESIS: BG SMDs related to positive serostatus were -0.10 [-0.39; 0.18] tNAA/tCr, 0.27 [0.05; 0.49] tCho/tCr, 0.60 [0.31; 0.90] mI/tCr, and -0.26 [-0.59; 0.06] tCr. GM SMDs related to serostatus were -0.29 [-0.49; -0.09] tNAA/tCr, 0.37 [0.19; 0.54] tCho/tCr, 0.41 [0.15; 0.68] mI/tCr, and -0.24 [-0.45; -0.03] tCr. WM SMDs related to serostatus were -0.52 [-0.79; -0.25] tNAA/tCr, 0.41 [0.21; 0.61] tCho/tCr, 0.59 [0.24; 0.94] mI/tCr, and -0.03 [-0.25; 0.19] tCr. WM regions showed larger serostatus effect sizes than BG and GM. I LIMITATIONS: Many studies pooled participants with varying treatment, infection, and comorbidity durations.

conclusionsHIV neurometabolite studies showed consistently lower tNAA/tCr, higher tCho/tCr and higher mI/tCr ratios associated with chronic HIV infection. Substantial between-study variation may have resulted from measurement technique variations, study population differences and HIV treatment changes over time. Higher WM tCho/tCr and mI/tCr may reflect reactive gliosis or myelin turnover. Neurometabolite measurements can reliably detect chronic HIV infection effects and may be useful in understanding the pathophysiology of cognitive and sensorimotor decline following HIV infection. CLASSIFICATION OF EVIDENCE: This study provides Class II evidence of neurometabolite differences in chronic HIV infection.

Indexed as

HIV InfectionsAspartic AcidBrainCholineCreatineHumansInositolMagnetic Resonance ImagingMagnetic Resonance SpectroscopyAspartic AcidCholineCreatineInositolAnti-retroviral therapyARTHANDHIV associated neurocognitive disorderInflammationMagnetic resonance spectroscopyMRSNeurons

Identifiers

PMID33383609
PMCPMC7596344
OpenAlexW3087105236

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.