HuMiChip2 for strain level identification and functional profiling of human microbiomes

Area of Science:

• Microbiology
• Genomics
• Bioinformatics

Background:

• The Human Microbiome Project generated vast data, posing challenges for extracting actionable insights.
• Strain-level identification and functional characterization are crucial for understanding microbiome roles.

Purpose of the Study:

• To develop a comprehensive microarray, HuMiChip2, for high-resolution human microbiome analysis.
• To enable strain-level identification and functional profiling of microbial communities.

Main Methods:

• HuMiChip2 design: 29,467 strain-specific probes and 133,924 sequence/group-specific probes.
• Probes target 2063 microbial strains/species and 157 functional gene families.
• Computational and experimental validation of probe specificity using mock communities and single strains.

Main Results:

• HuMiChip2 demonstrated high specificity for target microorganisms and genes.
• Alcoholic liver cirrhosis patients showed altered gut microbiome functional structure (p < 0.05).
• Specific gene families (21) and Bacteroides strains (5) were differentially abundant in cirrhosis patients (p < 0.1).

Conclusions:

• HuMiChip2 is an effective tool for strain-level identification and functional profiling of human microbiomes.
• The study highlights significant microbiome dysbiosis in alcoholic liver cirrhosis.