Cited by 151Extracellular vesicles in diseaseTraumatic Brain Injury and Neurovascular DisturbancesMicroRNA in disease regulation

Traumatic brain injury increases levels of miR‐21 in extracellular vesicles: implications for neuroinflammation

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Harrison, Emily B., Hochfelder, Colleen G., Lamberty, Benjamin G., Meays, Brittney M., Morsey, Brenda M., Kelso, Matthew L., Fox, Howard S., Yelamanchili, Sowmya V.·2016·FEBS Open Bio

Abstract

Traumatic brain injury (TBI) is an important health concern and effective treatment strategies remain elusive. Understanding the complex multicellular response to TBI may provide new avenues for intervention. In the context of TBI, cell-cell communication is critical. One relatively unexplored form of cell-cell communication in TBI is extracellular vesicles (EVs). These membrane-bound vesicles can carry many different types of cargo between cells. Recently, miRNA in EVs have been shown to mediate neuroinflammation and neuronal injury. To explore the role of EV-associated miRNA in TBI, we isolated EVs from the brain of injured mice and controls, purified RNA from brain EVs, and performed miRNA sequencing. We found that the expression of miR-212 decreased, while miR-21, miR-146, miR-7a, and miR-7b were significantly increased with injury, with miR-21 showing the largest change between conditions. The expression of miR-21 in the brain was primarily localized to neurons near the lesion site. Interestingly, adjacent to these miR-21-expressing neurons were activated microglia. The concurrent increase in miR-21 in EVs with the elevation of miR-21 in neurons, suggests that miR-21 is secreted from neurons as potential EV cargo. Thus, this study reveals a new potential mechanism of cell-cell communication not previously described in TBI.

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Crossref · 10.1002/2211-5463.12092

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  • By carrying pro-inflammatory or anti-inflammatory molecules, EVs can either exacerbate or mitigate secondary injury mechanisms, affecting progression of neuronal damage and cognitive deficits post-TBI.

    “By carrying molecules with pro-inflammatory or anti-inflammatory actions, EVs can either exacerbate or mitigate secondary injury mechanisms, thereby affecting the progression of neuronal damage and the development of cognitive deficits post-TBI [180].”

    From Extracellular vesicles as nanotheranostic platforms for targeted neurological disorder interventions (2024) · cites this paper as [180]

    The Discussion (page unavailable) describes EV-associated miRNAs that may promote neuronal injury and suggests that EV-carried miR-146 could reduce neuroinflammation after TBI. The Conclusion (page unavailable) says changes in EV miRNAs likely affect TBI progression, but their effects after TBI remain to be tested. The paper does not establish that EVs exacerbate or mitigate secondary injury, or link them to cognitive deficits after TBI. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • The molecular cargo of EVs, especially those released from injured brain cells, can modulate the immune response within the CNS, potentially influencing the trajectory of injury and subsequent recovery.

    “The molecular cargo of EVs, especially those released from injured brain cells, can modulate the immune response within the CNS, potentially influencing the trajectory of injury and subsequent recovery processes.”

    From Extracellular vesicles as nanotheranostic platforms for targeted neurological disorder interventions (2024) · cites this paper as [180]

    The Abstract (page unavailable) says EV miRNA can mediate neuroinflammation and neuronal injury, and the Conclusion says injury-related changes in EV miRNA likely affect TBI progression. The Conclusion also says whether neuronal EV miR-21 activates nearby microglia still needs testing. The paper does not link EV cargo to subsequent recovery processes. (LLM, conf=0.83)

    Experimental — accuracy not yet measured

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Authors
Harrison, E. B., Hochfelder, C. G., Lamberty, B. G., Meays, B. M., Morsey, B. M., Kelso, M. L., Fox, H. S., & Yelamanchili, S. V.
Affiliations
University of Nebraska Medical Center (US)
Corresponding author
Yelamanchili, Sowmya V.
Venue
FEBS Open Bio
Publisher
Wiley
Published
2016-06-14
Volume
6
Issue
8
Pages
835-846
ISSN
2211-5463 (ISSN-L)
OpenAlex
W2397416734
Cited by
151
References
61
Citations by year
2026: 7 · 2025: 8 · 2024: 11 · 2023: 20 · 2022: 18 · 2021: 21 · 2020: 17 · 2019: 17 · 2018: 21 · 2017: 10 · 2016: 1
FWCI
8.49
Type
journal article
Language
en
Open access
Locations
  • FEBS Open Bio (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DigitalCommons@UNMC (submittedVersion, cc-by)
Funders
Nebraska Research Initiative Grant
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Extracellular vesicles in disease
  • Health Sciences › Medicine › Neurology › Traumatic Brain Injury and Neurovascular Disturbances
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
Keywords
traumatic brain injury, extracellular vesicles, microRNA, miR-21, neuroinflammation, intercellular communication, microglial activation, neuronal injury, miR-212, miR-146, miR-7, vesicle cargo, brain injury biomarkers

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