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Effects of long-term regular oral aspirin combined with atorvastatin to prevent ischemic stroke on human gut microbiota.

PURPOSE: Every year, there is a large number of people take aspirin and atorvastatin to prevent ischemic stroke, but the effect of these drugs on gut microbiota remains unknown. We aimed to examine the effects of long-term regular oral aspirin with atorvastatin to prevent ischemic stroke on human gut microbiota.

METHODS: A cross-sectional study of 20 participants with the drugs over one year and the other 20 gender- and age-matching participants without medication were recruited from the Affiliated Hospital of Guizhou Medical University. The medication habits and dietary information were obtained using a questionnaire. Fecal samples collected from all participants were subjected to 16S rRNA sequencing of the microbiome. The datasets were analyzed using bioinformatics approaches.

RESULTS: The Alpha diversity showed that compared with controls, medication participants had lower ACE and Chao1 index, while no difference in the Shannon index and Simpson index. The Beta diversity analysis revealed significant shifts in the taxonomic compositions of the two groups. Linear discriminant analysis effect size (LEfSe) analysis combined with receiver operating characteristic (ROC) curves revealed the marker bacteria associated with taking medication were g_Parabacteroides(AUC = 0.855), g_Bifidobacterium(AUC = 0.815), s_Bifidobacterium_longum_subsp(AUC = 0.8075), and with no taking medication was g_Prevotella_9(AUC = 0.76).

CONCLUSIONS: Our findings indicated that long-term regular oral aspirin and atorvastatin modulate the human gut microbiota. Taking these drugs may affect the preventive effect of ischemic stroke by changing the abundance of specific gut microbiota.

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