Human milk oligosaccharide 2′-fucosyllactose alleviates cognitive impairment via the vagal afferent pathway in Alzheimer's disease mice

Jun 13, 2025Food & function

Human milk sugar 2'-fucosyllactose reduces memory problems through the nerve pathway to the brain in Alzheimer’s mice

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Abstract

Oral administration of 2'-fucosyllactose (2'-FL) at doses of 500 and 1000 mg kg improved cognitive deficits in Alzheimer’s disease model mice.

  • 2'-FL reduced β-amyloid deposition and neuroinflammation in the mice.
  • The treatment improved spatial and recognition memory, suggesting cognitive benefits.
  • Enhancement of c-Fos expression in the solitary tract nucleus indicated increased vagus nerve activity.
  • Vagotomy demonstrated that the cognitive improvement from 2'-FL relied on the vagus nerve.
  • 2'-FL improved gut barrier function and decreased gut inflammation.
  • Alterations in gut microbiota composition and increased production of short-chain fatty acids (SCFAs) were observed with 2'-FL treatment.

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