Usage of Metatranscriptomics to Understand Oral Disease

Area of Science:

• Microbiology
• Genomics
• Molecular Biology

Background:

• Metatranscriptomics offers a comprehensive view of bacterial activity at the transcriptional level within microbiota.
• 16S rDNA sequencing, while useful for composition, provides limited functional insights compared to metatranscriptomics.
• Understanding microbial gene expression is crucial for deciphering complex biological systems.

Purpose of the Study:

• To describe a novel protocol for performing metatranscriptomics on oral microbiota.
• To introduce a method for quantifying bacterial transcriptional activity using high-throughput sequencing.
• To establish a reliable internal control for measuring gene expression in microbial communities.

Main Methods:

• Development of a metatranscriptomics protocol specifically for oral microbiota samples.
• Utilization of high-throughput sequencing technology for comprehensive gene expression analysis.
• Implementation of ribosomal RNA (rRNA) expression levels as an internal control for normalization.

Main Results:

• The protocol enables detailed analysis of transcribed genes and the bacterial taxa responsible for them.
• A key innovation is the use of rRNA expression levels to normalize messenger RNA (mRNA) levels.
• The mRNA/rRNA ratio serves as a robust indicator of transcriptional activity for each bacterial taxon.

Conclusions:

• This metatranscriptomics protocol provides a powerful tool for studying oral microbiota function.
• The normalization method using rRNA expression enhances the accuracy of transcriptional activity measurements.
• The findings advance our ability to investigate microbial community dynamics and host-microbe interactions.