Genetics

The kynurenine pathway may represent an important metabolic link between excitotoxicity and neuroprotection in multiple sclerosis (MS). This blog post examines the findings of Hartai and colleagues, who investigated kynurenine aminotransferase (KAT I and KAT II) activity and kynurenic acid (KYNA) concentrations in the blood of patients experiencing MS exacerbations. Their results showed significantly increased KAT activity in red blood cells and elevated plasma KYNA levels, suggesting that peripheral kynurenine metabolism is altered during active disease. The authors propose that these changes may represent a compensatory protective response against excitotoxic damage, while also highlighting the kynurenine pathway as a potential target for future therapeutic strategies in MS.