Decreased kynurenine in cerebrospinal fluid and potential role in neuromyelitis optica spectrum disorder.

Tryptophan (Trp) metabolism has been implicated in neuroinflammatory and neurodegenerative disorders, but its relationship with neuromyelitis optica spectrum disorder (NMOSD) is unclear. In this pilot study, cerebrospinal fluid (CSF) was prospectively collected from 26 NMOSD patients in relapse and 16 controls with noninflammatory diseases and 6 neurometabolites in the tryptophan metabolic pathway, including 5-hydroxytryptamine (5-HT), kynurenine (KYN), melatonin (MLT), 5-hydroxyindoleacetic acid (5HIAA), 3-hydroxy-o-aminobenzoic acid (3-HAA), and kynurenic acid (KYA), were measured by ultrahigh-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS). The association of Trp metabolites with NMOSD and its clinical parameters was evaluated.

Cystatin C predicts the risk of incident cerebrovascular disease in the elderly: A meta-analysis on survival date studies.

Background: Stroke is the third leading cause of global year of life lost in all-age and second-ranked cause of disability adjusted life years in middle-aged and elder population. Therefore, it is critical to study the relationship between vascular-related risk factors and cerebrovascular diseases. Several cross-sectional studies have shown that Cystatin C (Cys C) is an independent risk factor for cerebrovascular diseases and levels of Cys C are significantly higher in stroke patients than in healthy individuals.

Myelin oligodendrocyte glycoprotein antibody-associated disorders coexisting with ankylosing spondylitis: Potential association between demyelination and tumor necrosis factor inhibitors.

Myelin oligodendrocyte glycoprotein antibody-associated disorders (MOGAD) is a newly described demyelinating disease. Ankylosing spondylitis (AS) is an inflammatory disease that predominantly affects the axial skeleton. Treatments for AS, such as tumor necrosis factor alpha (TNFα) inhibitors, may induce demyelination.