biostudies-literatureUnknown15(1)Quist-Paulsen E<h4>Background</h4>The host response to intruders in the central nervous system (CNS) may be beneficial but could also be harmful and responsible for neurologic symptoms and sequelae in CNS infections. This immune response induces the activation of the kynurenine pathway (KP) with the production of neuroactive metabolites. Herein, we explored cytokine and KP responses in cerebrospinal fluid (CSF) and serum in patients with encephalitis, aseptic, and bacterial meningitis.<h4>Methods</h4>Cytokines were measured in CSF and serum by multiplex assay in adult patients with encephalitis of infectious, autoimmune or unknown etiology (n = 10), aseptic meningitis (ASM, n = 25), acute bacterial meningitis (ABM, n = 6), and disease control patients with similar symptoms but without pleocytosis in CSF Journal of neuroinflammation327https://www.ebi.ac.uk/biostudies/studies/S-EPMC6260858biostudies-literatureHigh neopterin and IP-10 levels in cerebrospinal fluid are associated with neurotoxic tryptophan metabolites in acute central nervous system infections.PMC6260858Ueland TUeland PMStiksrud BOrmaasen VDyrhol-Riise AMAukrust PKran ABQuist-Paulsen EDunlop OMidttun OMollnes TEfalseHigh neopterin and IP-10 levels in cerebrospinal fluid are associated with neurotoxic tryptophan metabolites in acute central nervous system infections.<h4>Background</h4>The host response to intruders in the central nervous system (CNS) may be beneficial but could also be harmful and responsible for neurologic symptoms and sequelae in CNS infections. This immune response induces the activation of the kynurenine pathway (KP) with the production of neuroactive metabolites. Herein, we explored cytokine and KP responses in cerebrospinal fluid (CSF) and serum in patients with encephalitis, aseptic, and bacterial meningitis.<h4>Methods</h4>Cytokines were measured in CSF and serum by multiplex assay in adult patients with encephalitis of infectious, autoimmune or unknown etiology (n = 10), aseptic meningitis (ASM, n = 25), acute bacterial meningitis (ABM, n = 6), and disease control patients with similar symptoms but without pleocytosis in CSF 2018-01-01T00:00:00Z2018 Nov2026-05-05T21:36:09.194Z2026-04-07T22:00:12.192ZS-EPMC62608583047023410.1186/s12974-018-1366-3