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Molecular Medicine

, Volume 21, Issue 1, pp 219–226 | Cite as

CD40-CD40 Ligand Pathway Is a Major Component of Acute Neuroinflammation and Contributes to Long-term Cognitive Dysfunction after Sepsis

  • Monique Michels
  • Lucinéia Gainski Danieslki
  • Andriele Vieira
  • Drielly Florentino
  • Dhébora Dall’Igna
  • Letícia Galant
  • Beatriz Sonai
  • Francieli Vuolo
  • Franciele Mina
  • Bruna Pescador
  • Diogo Dominguini
  • Tatiana Barichello
  • Joäo Quevedo
  • Felipe Dal-Pizzol
  • Fabrícia Petronilho
Research Article

Abstract

Sepsis-associated encephalopathy (SAE) is associated with an increased rate of morbidity and mortality. It is not understood what the exact mechanism is for the brain dysfunction that occurs in septic patients, but brain inflammation and oxidative stress are a possible theory. Such events can occur through the alteration of molecules that perpetuate the inflammatory response. Thus, it is possible to postulate that CD40 may be involved in this process. The aim of this work is to evaluate the role of CD40-CD40L pathway activation in brain dysfunction associated with sepsis in an animal model. Microglia activation induces the upregulation of CD40-CD40L, both in vitro and in vivo. The inhibition of microglia activation decreases levels of CD40-CD40L in the brain and decreases brain inflammation, oxidative damage and blood brain barrier dysfunction. Despite this, anti-CD40 treatment does not improve mortality in this model. However, it is able to improve long-term cognitive impairment in sepsis survivors. In conclusion, there is a major involvement of the CD40-CD40L signaling pathway in long-term brain dysfunction in an animal model of sepsis.

Notes

Acknowledgments

This work was supported by CNPq (grant number 476859/2012-3), and NENASC project (PRONEX program from CNPq/FAPESC).

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Authors and Affiliations

  • Monique Michels
    • 1
  • Lucinéia Gainski Danieslki
    • 1
  • Andriele Vieira
    • 1
  • Drielly Florentino
    • 1
  • Dhébora Dall’Igna
    • 2
  • Letícia Galant
    • 2
  • Beatriz Sonai
    • 2
  • Francieli Vuolo
    • 2
  • Franciele Mina
    • 3
  • Bruna Pescador
    • 3
  • Diogo Dominguini
    • 3
  • Tatiana Barichello
    • 4
    • 5
  • Joäo Quevedo
    • 3
    • 5
  • Felipe Dal-Pizzol
    • 2
  • Fabrícia Petronilho
    • 1
    • 6
  1. 1.Laboratory of Clinical and Experimental Pathophysiology, Graduate Program in Health SciencesUniversity of South of Santa CatarinaFlorianópolisBrazil
  2. 2.Laboratory of Experimental Pathophysiology, Graduate Program in Health SciencesUniversity of South of Santa CatarinaTubaräoBrazil
  3. 3.Graduate Program in Health Sciences, Health Sciences UnitLaboratory of NeurosciencesCriciúmaBrazil
  4. 4.Laboratory of Experimental Microbiology, Graduate Program in Health Sciences, Health Sciences UnitUniversity of Southern Santa CatarinaCriciúmaBrazil
  5. 5.Center for Experimental Models in Psychiatry, Department of Psychiatry and Behavioral Sciences, Medical SchoolThe University of Texas Health Science Center at HoustonHoustonUSA
  6. 6.Programa de Mestrado em Ciências da SaúdeUniversidade do Sul de Santa CatarinaFlorianópolisBrazil

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