Impact of Age on Plasma Inflammatory Biomarkers in the 6 Months Following Mild Traumatic Brain Injury

Overview

Journal J Head Trauma Rehabil

Specialties Emergency Medicine
Rehabilitation Medicine

Date 2020 Sep 4

PMID 32881766

Citations 7

Authors

Hilaire J Thompson

Sarah R Martha

Jin Wang

Kyra J Becker

Affiliations

Soon will be listed here.

Abstract

Objective: To compare plasma inflammatory biomarker concentrations to 6 months in young and older adults with and without mild traumatic brain injury (TBI).

Setting: Level 1 trauma center.

Participants: Younger (21-54 years) and older (55+) adults diagnosed with mild TBI along with age-/sex-matched noninjured controls (n = 313).

Design: Prospective cohort study.

Main Measures: Multiplex assays were used to quantify concentrations of selected plasma inflammatory markers at day 0, months 1 and 6.

Results: Persistent aging-related differences were found between control groups in concentrations of 4 cytokines up to 6 months. At day 0, interleukin-6 (IL-6), IL-8, and fractalkine were higher in the older TBI compared with older control as well as the younger TBI groups, while IL-10 was higher in older TBI compared with controls. At month 1, significantly higher concentrations of IL-8, fractalkine, and tumor necrosis factor-α (TNF-α) were seen. At 6 months postinjury, significantly higher concentrations of IL-6 and IL-8 were seen, while a lower concentration of IL-7 was found in older versus younger TBI groups.

Conclusion: The neuroinflammatory signature that accompanies mild TBI in older adults differs from that of younger adults. The differences seen are notable for their roles in neutrophil attraction (IL-8), neuronal-microglial-immune cell interactions (fractalkine), and chronic inflammation (IL-6).

Citing Articles

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A Systematic Review and Meta-Analysis of the Inflammatory Biomarkers in Mild Traumatic Brain Injury.

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