Cerebral Intraparenchymal Hemorrhage Changes Patients' Gut Bacteria Composition and Function

Area of Science:

• Microbiome research
• Neuroscience
• Genomics

Background:

• Gut bacteria play a crucial role in human health, influencing disease and even mentality.
• The impact of human brain injury on the gut microbiome remains largely unexplored.

Purpose of the Study:

• To investigate alterations in gut bacteria composition and function following cerebral intraparenchymal hemorrhage.
• To identify specific microbial changes associated with brain injury.

Main Methods:

• Metagenomic shotgun sequencing was employed to analyze 20 fecal samples from patients with cerebral intraparenchymal hemorrhage and healthy controls.
• Comparative analysis of gut bacteria composition and functional profiles between patient and control groups.

Main Results:

• Significant changes in gut bacteria composition at the phylum level were observed in patients.
• The phylum Verrucomicrobiota was specifically identified in the gut of patients.
• Functional alterations included increased metabolic activity for nutrients and neuroactive compounds, enhanced antibiotic resistance, and reduced virulence factor diversity.

Conclusions:

• Cerebral intraparenchymal hemorrhage leads to distinct alterations in the gut microbiome.
• Changes in differential species' transcription and metabolism are key drivers of functional gut bacteria shifts in patients with brain injury.