Advancing transcriptomic profiling of airborne bacteria.

Area of Science:

• Aerobiology
• Microbial Ecology
• Molecular Biology

Background:

• Bioaerosol research has identified airborne microbes but little is known about their real-time activity and metabolic responses to aerosolization.
• Microbial messenger RNA (mRNA) provides a unique window into organismal responses to environmental stresses.
• Understanding live bioaerosol activity is crucial for environmental health due to constant human exposure.

Purpose of the Study:

• To review current transcriptomic knowledge on airborne bacterial activity under aerosolization stress.
• To discuss potential artifacts in bioaerosol collection affecting mRNA fidelity.
• To provide recommendations for improving gene expression studies of airborne microbes.

Main Methods:

• Review of transcriptomic studies on airborne bacteria.
• Analysis of mRNA preservation and fidelity during aerosolization and collection.
• Discussion of experimental design for bioaerosol research.

Main Results:

• Transcriptomic data reveal bacterial cellular activity and responses to environmental stresses during aerosolization.
• Aerosolization and collection methods can introduce artifacts impacting mRNA integrity.
• Specific experimental improvements are needed to accurately capture transcriptional activity.

Conclusions:

• Transcriptome profiling is a valuable tool for assessing live bioaerosol activity and stress responses.
• Optimizing bioaerosol collection and experimental conditions is essential for reliable gene expression data.
• Further research can elucidate the role of the atmosphere as a microbial habitat or transient pathway.