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Related Concept Videos

Traumatic Brain Injury l: Introduction01:28

Traumatic Brain Injury l: Introduction

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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Controlled Cortical Impact Model for Traumatic Brain Injury
05:30

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Published on: August 5, 2014

Endocannabinoids and traumatic brain injury.

R Mechoulam1, E Shohami

  • 1Department of Medicinal Chemistry and Natural Products, Hebrew University Medical Faculty, Ein Kerem campus, Jerusalem 91120, Israel. mechou@cc.huji.ac.il

Molecular Neurobiology
|October 24, 2007
PubMed
Summary

2-arachidonoylglycerol (2-AG) accumulates after traumatic brain injury, offering neuroprotection by reducing inflammation and protecting the blood-brain barrier. This endogenous cannabinoid system component is a potential therapeutic target for brain injury.

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Last Updated: Jul 10, 2026

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Published on: January 20, 2023

Area of Science:

  • Neuroscience
  • Pharmacology
  • Cell Biology

Background:

  • Traumatic brain injury (TBI) triggers local 2-arachidonoylglycerol (2-AG) accumulation.
  • Exogenous 2-AG demonstrates neuroprotective effects, suggesting a role in mitigating TBI-induced damage.

Purpose of the Study:

  • To investigate the role of 2-AG and cannabinoid receptor 1 (CB1) in TBI pathophysiology.
  • To elucidate the mechanisms underlying 2-AG's neuroprotective effects in TBI.

Main Methods:

  • Utilized CB1 antagonist SR-141716A and CB1 knockout mice to assess 2-AG's mechanism.
  • Analyzed the impact of 2-AG on NF-kappaB transactivation and pro-inflammatory cytokine expression (TNF-alpha, IL-6, IL-1beta).
  • Examined the interaction of 2-AG with CB1, CB2, and TRVP1 receptors on microvascular endothelial cells and its effect on endothelin-1 (ET-1) responses.

Main Results:

  • 2-AG accumulation peaks at 4 hours post-TBI and persists for at least 24 hours.
  • 2-AG's neuroprotection involves inhibiting NF-kappaB transactivation and early expression of pro-inflammatory cytokines.
  • 2-AG reduces blood-brain barrier (BBB) permeability and counteracts ET-1-induced vasoconstriction via endothelial receptor activation.

Conclusions:

  • 2-AG and the CB1 receptor are crucial in TBI pathophysiology.
  • 2-AG exerts neuroprotection through anti-inflammatory and BBB-protective mechanisms.
  • The interaction between 2-AG and ET-1 signaling presents a potential therapeutic pathway for TBI.