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Published on: May 8, 2016

CXC chemokines generate age-related increases in neutrophil-mediated brain inflammation and blood-brain barrier

D Anthony1, R Dempster, S Fearn

  • 1Department of Pharmacology University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK.

Current Biology : CB
|August 26, 1998
PubMed

Insights

Young brains are more vulnerable to inflammation and damage after injury due to a heightened response to specific inflammatory signals called CXC chemokines. Blocking these signals may protect developing brains.

Area of Science:

  • Neuroscience
  • Immunology
  • Developmental Biology

Background:

  • Children face higher risks of brain damage and mortality from head injuries or infections compared to adults.
  • Rodent models reveal a 'window of susceptibility' in young animals, where the brain is more prone to neutrophil-mediated blood-brain barrier damage.
  • Interleukin-1beta (IL-1beta) triggers a robust neutrophil-mediated inflammatory response in young rodents, unlike in adults.

Purpose of the Study:

  • To investigate the mechanisms behind age-related susceptibility to brain inflammation.
  • To identify specific inflammatory mediators responsible for increased brain damage in young animals.
  • To explore potential therapeutic targets for mitigating brain injury in immature central nervous systems.

Main Methods:

  • Intracerebral administration of interleukin-1beta (IL-1beta) in young and adult rodent models.
  • Measurement of CXC chemokine induction, particularly cytokine-induced neutrophil chemoattractant (CINC-1).
  • Assessment of neutrophil response and blood-brain barrier integrity.
  • Administration of an anti-CINC-1 neutralising antibody to evaluate its protective effects.

Main Results:

  • Interleukin-1beta (IL-1beta) rapidly induced CXC chemokines, including CINC-1, in the brains of young rats.
  • Young rats exhibited a more intense neutrophil response to IL-1beta compared to adult rats.
  • An anti-CINC-1 neutralising antibody significantly attenuated IL-1beta-induced blood-brain barrier breakdown in young rats.

Conclusions:

  • The immature central nervous system (CNS) is highly susceptible to the chemotactic effects of CXC chemokines.
  • CXC chemokines, such as CINC-1, play a critical role in mediating neutrophil-induced blood-brain barrier damage in young brains.
  • Blocking CXC chemokine activity presents a promising therapeutic strategy for preventing brain inflammation and damage in vulnerable pediatric populations.

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