Evidence map›Paper›PMID 31931830›Full record

ArticleJournal of neuroinflammation2020

Blast traumatic brain injury and serum inflammatory cytokines: a repeated measures case-control study among U.S. military service members.

Jennifer Rusiecki, Lynn I Levin, Li Wang, Celia Byrne, Jayasree Krishnamurthy, Ligong Chen, Zygmunt Galdzicki, Louis M French

Open access · goldAbstract read
In one paragraph

Article in Journal of neuroinflammation, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
2.0field-weighted citation impact, top 11% 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

19 citing papers in PubMed, 1 synthesis or guideline pooled it, 30 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

8 authors at 3 institutions in 1 country.

Jennifer RusieckiDepartment of Preventive Medicine and Biostatistics, F. Edward Hébert School of Medicine, Uniformed Services University, Bethesda, MD, USA. jennifer.rusiecki@usuhs.edu.
Lynn I LevinStatistics and Epidemiology Branch, Walter Reed Army Institute of Research, Silver Spring, MD, USA.
Li WangDepartment of Preventive Medicine and Biostatistics, F. Edward Hébert School of Medicine, Uniformed Services University, Bethesda, MD, USA.
Celia ByrneDepartment of Preventive Medicine and Biostatistics, F. Edward Hébert School of Medicine, Uniformed Services University, Bethesda, MD, USA.
Jayasree KrishnamurthyDepartment of Pediatrics, F. Edward Hébert School of Medicine, Uniformed Services University, Bethesda, MD, USA.
Ligong ChenDepartment of Preventive Medicine and Biostatistics, F. Edward Hébert School of Medicine, Uniformed Services University, Bethesda, MD, USA.
Zygmunt GaldzickiDepartment of Anatomy, Physiology, and Genetics, F. Edward Hébert School of Medicine, Uniformed Services University, Bethesda, MD, USA.
Louis M FrenchNational Intrepid Center of Excellence, Walter Reed National Military Medical Center, Bethesda, MD, USA.
Uniformed Services University of the Health Sciences · USWalter Reed Army Institute of Research · USWalter Reed National Military Medical Center · US

Funding

Congressionally Directed Medical Research Programs PT073882
6 · The paper itself

Abstract

backgroundThere is a paucity of human data on exposure to blast traumatic brain injury (bTBI) and the corresponding systemic cytokine immune response at later time points (i.e., months, years) post-injury.

methodsWe conducted a repeated measures, case-control study, examining associations of serum levels of pro- and anti-inflammatory cytokines, measured both pre- and post-deployment with having mild and moderate/severe bTBI. Utilizing serum from the Department of Defense Serum Repository cytokines were measured via an ELISA-based array for 15 cytokines. We compared pre- vs. post-levels among mild cases, moderate/severe cases, and controls and carried out case-control comparisons, using paired t- tests and generalized linear models.

resultsThe average time between bTBI and post-deployment/bTBI serum among cases was 315.8 days. From pre- to post-deployment/bTBI, levels of interleukin 8 (IL-8) were decreased among both mild cases (μ = - 83.43 pg/ml; s.e. = 21.66) and moderate/severe cases (μ = - 107.67 pg/ml; s.e. = 28.74 pg/ml), while levels increased among controls (μ = 32.86 pg/ml; s.e. = 30.29). The same pattern occurred for matrix metallopeptidase 3 (MMP3), with levels decreasing for moderate/severe cases (μ = - 3369.24 pg/ml; s.e. = 1701.68) and increasing for controls (μ = 1859.60 pg/ml; s.e. = 1737.51) from pre- to post-deployment/bTBI. Evidence was also suggestive of case-control differences, from pre- to post-deployment/bTBI for interleukin 1 alpha (IL-1α), interleukin 4 (IL-4), and interleukin 6 (IL-6) among moderate/severe cases.

conclusionThe findings of this longitudinal study indicate that in the chronic phase of bTBI, levels of IL-8 and MMP3 may be substantially lower than pre-injury. These results need confirmation in other studies, potentially those that account for treatment differences, which was not possible in our study.

Indexed as

AdultBlast InjuriesBrain Injuries, TraumaticCase-Control StudiesCytokinesFemaleHumansInflammationLongitudinal StudiesMaleMiddle AgedMilitary PersonnelYoung AdultCytokinesCytokinesInflammationMicroarrayMilitaryOperation enduring freedomOperation Iraqi freedomProteinTBITraumatic brain injury

Identifiers

PMID31931830
PMCPMC6958571
OpenAlexW3004046558

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.