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Related Concept Videos

Traumatic Brain Injury l: Introduction01:28

Traumatic Brain Injury l: Introduction

37
DefinitionTraumatic brain injury, or TBI, is a disturbance of normal brain function induced by an external mechanical force, such as a direct blow to the head or a penetrating injury. It can affect both brain structure and function, producing a wide range of clinical outcomes. TBI is a heterogeneous condition, meaning its effects may differ based on the type, location, and severity of the injury.Basis of ClassificationTBI is classified based on severity, injury mechanism, or pathophysiology. In...
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Immunosuppressive Formulations for Immunological Defense against Traumatic Brain Injury.

Kelly Lintecum1, Abhirami Thumsi2, Kara Dunn1

  • 1Biomedical Engineering, School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, 85281, USA.

Advanced Healthcare Materials
|May 29, 2025
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Summary

A novel formulation containing polymer of alpha-ketoglutarate (paKG) with PFK15 and myelin antigens reduces neuroinflammation and improves motor function after traumatic brain injury (TBI). This approach targets chronic inflammation, offering a potential new strategy for TBI treatment.

Keywords:
TBIantigen‐specificimmunosuppressivemicroparticlestrauma

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Area of Science:

  • Neuroscience
  • Immunology
  • Biochemistry

Background:

  • Traumatic brain injury (TBI) leads to neurodegeneration driven by chronic local and systemic inflammation.
  • Current TBI treatments do not effectively manage inflammation, highlighting the need for novel anti-inflammatory strategies.
  • Developing interventions to mitigate TBI-induced inflammation is crucial for minimizing long-term neurological damage.

Purpose of the Study:

  • To evaluate a novel subcutaneous formulation for its prophylactic immunosuppressive effects in a mouse model of TBI.
  • To investigate the formulation's impact on immune cell populations, neuroinflammation, and motor function post-TBI.
  • To determine if the formulation can reduce TBI-associated inflammation and its sequelae.

Main Methods:

  • A subcutaneous formulation comprising polymer of alpha-ketoglutarate (paKG), PFK15 (PFKFB3 inhibitor), alpha-ketoglutarate, and a myelin proteolipid protein peptide (PLP139-151) was developed.
  • In vitro studies assessed the formulation's effects on T cell proliferation and differentiation.
  • Mice received the formulation two weeks prior to TBI induction; immune cell analysis, immunohistochemistry, spatial proteomics, and motor function tests were performed post-TBI.

Main Results:

  • The formulation stimulated regulatory T cells and T helper-2 cells in vitro.
  • Subcutaneous administration increased immunosuppressive macrophages and dendritic cells in the periphery and brain post-TBI.
  • Enhanced infiltration of PLP-specific immunosuppressive cells into the brain was observed by day 28 post-TBI, alongside altered neuroinflammation markers and improved motor function.

Conclusions:

  • The developed paKG-based formulation effectively induces an anti-inflammatory profile.
  • This prophylactic immunosuppressive approach shows promise in decreasing TBI-associated inflammation and improving outcomes.
  • The findings suggest a potential new therapeutic avenue for managing TBI and preventing subsequent neurodegeneration.