# Effect of evolocumab on the gut microbiota in patients with acute myocardial infarction

## TL;DR

This study found that evolocumab, a drug used for heart disease, can shift gut bacteria in patients with heart attacks toward a healthier balance.

## Contribution

First study to investigate the effect of evolocumab on gut microbiota in acute myocardial infarction patients.

## Key findings

- Evolocumab treatment increased the abundance of beneficial bacteria like Odoribacter and Parabacteroides.
- Firmicutes decreased while Bacteroidota increased in patients after evolocumab treatment.
- No significant differences in gut microbiota diversity were observed between groups.

## Abstract

Introduction. Growing evidence indicates significant interactions between the intestinal microflora and drugs commonly used to treat coronary heart disease.

Hypothesis/Gap Statement. Despite this, research specifically investigating the relationship between proprotein convertase subtilisin/kexin type 9 inhibitors and alterations in the gut microbiota has not been previously published.

Aim. This study aimed to identify changes in the gut microbiota potentially associated with evolocumab use in patients with acute myocardial infarction (AMI).

Methodology. In this prospective study, 26 AMI patients receiving statins (≥8 weeks) were administered evolocumab (420 mg/4 weeks) alongside standard therapy. Eighteen age-matched healthy volunteers served as controls. 16S rRNA sequencing (NCBI SRA: PRJNA1154993) was subsequently performed on samples from these groups to analyse the gut microbiota community.

Results. No significant α-diversity differences were observed among groups (P>0.05). Firmicutes dominated AMI-evolocumab baseline (0 W: 76.32%) versus post-treatment (8 W: 65.22%) and controls (60.40%), while Bacteroidota increased post-treatment (0 W: 15.07%→8 W: 19.99%; control: 27.11%). The second most abundant phyla were Proteobacteria and Actinobacteria. In addition, the differences in the microbial structure among the three groups were as follows: at the genus level, the results of the genus difference analysis revealed significant differences in the abundances of nine types of bacteria among the three groups. Compared with those in the AMI-evolocumab (0 W) group, the abundances of beneficial bacteria, such as Odoribacter and Parabacteroides, were increased in the AMI-evolocumab (8 W) group.

Conclusion. Our research showed that evolocumab can regulate the gut microbiota of patients with AMI to promote a healthier state, which is beneficial for patients with AMI.