Journal
JOURNAL OF NEUROIMMUNOLOGY
Volume 273, Issue 1-2, Pages 96-102Publisher
ELSEVIER
DOI: 10.1016/j.jneuroim.2014.05.009
Keywords
Human brain abscess; Cytokines; Gram negative bacteria; Gram positive bacteria
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Funding
- extramural grant IRIS by the Indian Council for Medical Research [2008-01430]
- UGC from the University Grant Commission, Govt of India [2040/(NET)]
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Brain abscess is a focal suppurative process. Host inflammatory response in Gram type and specific bacteria has not been studied in brain abscess. A total of 57 brain abscess patients with monomicrobial infections were studied for Thl (TNF-alpha, IFN-gamma, IL1-beta), Th2 (IL-4, IL-10) and Th17 (IL-17, IL-23) cytokine response by reverse-transcriptase,PCR and ELISA. Th1 and Th17 cytokines were significantly elevated in Gram positive (Staphylococcus aureus and Streptococcus intermedius) and Th2 cytokine (IL-10) in Gram negative (Bacteroides fragilis and Escherichia coli) infections (p < 0.05). Cytokine levels were significantly higher in abscess than blood (p < 0.001). Elevated levels of several inflammatory cytokines (TNF-alpha, IFN-gamma,IL1-beta, IL-17 and IL-23) were associated with the duration of symptoms; predisposing factors also influenced the levels of several cytokines. The expression of inflammatory cytokines in abscess was influenced by the bacterial pathogen, duration of symptoms and predisposing factors. Local milieu of brain plays significant role in secretion of various cytokines. (C) 2014 Elsevier B.V. All rights reserved.
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