Strategy for microbiome analysis using 16S rRNA gene sequence analysis on the Illumina sequencing platform

Area of Science:

• Microbiology
• Genomics
• Bioinformatics

Background:

• Human microbiome research is vital for understanding diseases like vaginosis.
• High-throughput sequencing reveals microbiome diversity but can be costly.
• Current Illumina Genome Analyzer (IGA) limitations restrict read length for phylogenetic analysis.

Purpose of the Study:

• To develop and test a multiplex sequencing strategy for the IGA to achieve >300 base reads.
• To enable cost-effective, in-depth analysis of the human microbiome, including urogenital samples.
• To overcome IGA's short read-length limitation for 16S rRNA gene sequencing.

Main Methods:

• A multiplex sequencing strategy was designed for PCR-amplified 16S rRNA genes.
• The strategy was tested on the Illumina Genome Analyzer (IGA).
• Bioinformatic optimization of the IGA Bustard analysis pipeline was performed.

Main Results:

• The multiplex strategy successfully produced amplicons of expected size.
• Correct sequences were obtained using proposed forward primers.
• Bioinformatic adjustments improved sequence extraction from IGA data.

Conclusions:

• The developed multiplex sequencing method enables deep microbiome profiling (>300 bases) on the IGA.
• This technique offers a cost-effective solution for extensive taxonomic identification per sample.
• Further optimization of the analysis pipeline could enhance data quality and analysis scope.