TY - JOUR
T1 - A kinetic study of the cytokine/chemokines levels and disruption of blood-brain barrier in infant rats after pneumococcal meningitis
AU - Barichello, Tatiana
AU - Pereira, Joseandra S.
AU - Savi, Geovana D.
AU - Generoso, Jaqueline S.
AU - Cipriano, Andreza L.
AU - Silvestre, Cintia
AU - Petronilho, Fabricia
AU - Dal-Pizzol, Felipe
AU - Vilela, Márcia Carvalho
AU - Teixeira, Antonio Lucio
PY - 2011/4
Y1 - 2011/4
N2 - Bacterial meningitis is an inflammation of the meninges and subarachnoid space that occurs in response of bacteria. Young children are particularly vulnerable to bacterial meningitis, two thirds of meningitis deaths in low-income countries occur among children under the age of fifteen. The main bacterial pathogens causing meningitis beyond the neonatal period are Streptococcus pneumoniae, Haemophilus influenza type b and Neisseria meningitidis. Therefore, the aim of this study is to evaluate the kinetic and the levels of TNF-α, IL-1β, IL-6, IL-10 and CINC-1 in different brain regions as well as the blood-brain barrier permeability after meningitis induced by S. pneumoniae in infant Wistar rats. The animals underwent a magna cistern tap receiving either 10μL sterile saline as a placebo or an equivalent volume of a S. pneumoniae suspension at the concentration 1×106CFU/mL. The animals were killed at different times after induction. The brain was removed and the hippocampus and the cortex were isolated and used for the determination of cytokine/chemokine levels and blood-brain barrier permeability. The cerebrospinal fluid was obtained by puncture of the cisterna magna to TNF-α and IL-1β analysis. In the hippocampus, the CINC-1 and IL-1μ levels were found increased at 6h, 12h and 24h after pneumococcal meningitis induction. In the cortex the levels of the CINC-1 were increased at 6h, 12h and 24h. The IL-1μ and TNF-α were increased at 12h and 24h. The level of IL-6 was increased only after 24h after pneumococcal meningitis induction. In cerebrospinal fluid, the TNF-α was increased at 12h, 24h and IL-1 was increased at 24h after S. pneumoniae induction. The blood-brain barrier breakdown in hippocampus and cortex were observed at 12h until 24h during meningitis. In conclusion, a peak of pro-inflammatory cytokine/chemokine is associated with disruption of the blood-brain barrier in infants with pneumococcal meningitis.
AB - Bacterial meningitis is an inflammation of the meninges and subarachnoid space that occurs in response of bacteria. Young children are particularly vulnerable to bacterial meningitis, two thirds of meningitis deaths in low-income countries occur among children under the age of fifteen. The main bacterial pathogens causing meningitis beyond the neonatal period are Streptococcus pneumoniae, Haemophilus influenza type b and Neisseria meningitidis. Therefore, the aim of this study is to evaluate the kinetic and the levels of TNF-α, IL-1β, IL-6, IL-10 and CINC-1 in different brain regions as well as the blood-brain barrier permeability after meningitis induced by S. pneumoniae in infant Wistar rats. The animals underwent a magna cistern tap receiving either 10μL sterile saline as a placebo or an equivalent volume of a S. pneumoniae suspension at the concentration 1×106CFU/mL. The animals were killed at different times after induction. The brain was removed and the hippocampus and the cortex were isolated and used for the determination of cytokine/chemokine levels and blood-brain barrier permeability. The cerebrospinal fluid was obtained by puncture of the cisterna magna to TNF-α and IL-1β analysis. In the hippocampus, the CINC-1 and IL-1μ levels were found increased at 6h, 12h and 24h after pneumococcal meningitis induction. In the cortex the levels of the CINC-1 were increased at 6h, 12h and 24h. The IL-1μ and TNF-α were increased at 12h and 24h. The level of IL-6 was increased only after 24h after pneumococcal meningitis induction. In cerebrospinal fluid, the TNF-α was increased at 12h, 24h and IL-1 was increased at 24h after S. pneumoniae induction. The blood-brain barrier breakdown in hippocampus and cortex were observed at 12h until 24h during meningitis. In conclusion, a peak of pro-inflammatory cytokine/chemokine is associated with disruption of the blood-brain barrier in infants with pneumococcal meningitis.
KW - Chemokines
KW - Cytokines
KW - Meningitis
KW - Streptococcus pneumoniae
UR - http://www.scopus.com/inward/record.url?scp=79953318174&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79953318174&partnerID=8YFLogxK
U2 - 10.1016/j.jneuroim.2010.10.035
DO - 10.1016/j.jneuroim.2010.10.035
M3 - Article
C2 - 21109308
AN - SCOPUS:79953318174
SN - 0165-5728
VL - 233
SP - 12
EP - 17
JO - Journal of Neuroimmunology
JF - Journal of Neuroimmunology
IS - 1-2
ER -