# Plasma Metabolites Link Non‐Communicable Diseases to Increased White Matter Hyperintensities

## TL;DR

This study finds that non-communicable diseases are linked to increased white matter hyperintensities, with plasma metabolites playing a mediating role.

## Contribution

The study identifies plasma metabolites as mediators linking non-communicable diseases to increased white matter hyperintensities.

## Key findings

- Individuals with NCDs had significantly increased white matter hyperintensities (WMH) volume compared to those without.
- Plasma metabolites associated with NCDs partially mediate the increased risk of WMH.
- Hypertension, obstructive sleep apnea, and coronary ischemic heart disease were strongly linked to larger WMH volumes.

## Abstract

Cerebral small vessel disease (CSVD) and non‐communicable diseases (NCDs) are major global health burdens. White matter hyperintensities (WMH) are a key imaging feature of CSVD, but the relationship between WMH and NCDs, especially the role of plasma metabolites in this association, remains unclear. This study aims to elucidate this link.

This study included participants with WMH from the UK Biobank cohort and examined the prevalence of 29 common NCDs in this population. General linear regression was used to analyze the association between NCDs and WMH. Propensity score matching and elastic net regression identified plasma metabolites associated with NCDs. Mediation analysis was conducted to explore the role of these metabolites in the association between NCDs and WMH.

A total of 44,630 participants were included, of whom 47.0% were male. Approximately one‐third of the participants had NCDs, with the most common being hypertension, dyslipidemia, and asthma. Compared to those without NCDs, the WMH volume in individuals with one or more comorbid NCDs was significantly increased by 18.43% to 68.15%. During a median follow‐up of 9.5 years, individuals with hypertension, obstructive sleep apnea, and hypertension combined with coronary ischemic heart disease had significantly larger WMH volumes compared to those without NCDs, with increases of 30.81%, 36.44%, and 36.75%, respectively. Further analysis revealed that plasma metabolites associated with NCDs mediated this risk.

This study elucidated the association between WMH and NCDs, showing that common NCDs significantly increase WMH volume. Plasma metabolites associated with NCDs mediate this risk. This provides new insights into preventing WMH progression in individuals.

Approximately one‐third of individuals with white matter hyperintensities (WMH) have at least one common non‐communicable disease (NCDs). Individuals with NCDs have a larger WMH volume, with NCD‐related plasma metabolites partially contributing to this increase.