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NOD2-RIP2 contributes to the inflammatory responses of mice in vivo to Streptococcus pneumoniae

Yuan Zheng1, Feng Shang2, Li An1

  • 1Department of Pediatrics, Jinan Central Hospital Affiliated with Shandong University, Jinan, Shandong, China.

Neuroscience Letters
|February 7, 2018
PubMed

Insights

The NOD2-RIP2 pathway is involved in Streptococcus pneumoniae meningitis. The RIP2 inhibitor gefitinib reduces inflammation and protects neurons in a mouse model, offering a potential therapeutic strategy.

Area of Science:

  • Neuroscience
  • Immunology
  • Microbiology

Background:

  • Streptococcus pneumoniae is a common cause of bacterial meningitis.
  • The NOD2-RIP2 pathway plays a role in innate immunity and inflammation.
  • Understanding host responses is crucial for developing effective treatments.

Purpose of the Study:

  • To investigate the role of the NOD2-RIP2 pathway in S. pneumoniae meningitis.
  • To evaluate the therapeutic potential of the RIP2 inhibitor gefitinib.

Main Methods:

  • A mouse model of S. pneumoniae meningitis was established.
  • Mice were treated with gefitinib or vehicle.
  • NOD2-RIP2 pathway activation, inflammatory markers, and neuronal injury were assessed.

Main Results:

  • S. pneumoniae meningitis upregulated NOD2, RIP2, NF-κB, TNF-α, and IL-6 in the CNS.
  • Meningitis led to severe illness and significant neuronal loss.
  • Gefitinib treatment reduced NF-κB activation, inflammatory cytokine levels, and neuronal damage.

Conclusions:

  • The NOD2-RIP2 pathway is implicated in the host response to S. pneumoniae in the central nervous system.
  • Gefitinib demonstrates neuroprotective effects against S. pneumoniae-induced brain damage.
Keywords:
CytokinesGram-positive bacteriaMeningitisNOD2RIP2

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