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Eye and Blood Levels of SLIT2 Track Cognition in Middle-Aged Adults, Study Finds

The peer-reviewed report signals preliminary biomarker potential requiring larger, longitudinal validation.

Overview

  • In a cohort of 79 surgical patients with a mean age of about 56, researchers measured SLIT2 in vitreous humor and plasma using a custom Meso Scale Discovery electrochemiluminescence assay.
  • Lower SLIT2 in vitreous humor was linked to lower Montreal Cognitive Assessment scores and poorer immediate verbal recall.
  • Higher SLIT2 in plasma was associated with lower global cognition scores on the MoCA, showing an opposite-direction pattern to the eye fluid.
  • Vitreous humor contained up to seven times more SLIT2 than plasma, and levels in the two compartments did not correlate.
  • The findings, now published in the Journal of Alzheimer’s Disease after an ARVO presentation in May, remained significant after adjusting for demographics and health factors but are cross-sectional and need replication.