Sputum Microbiome Composition in Patients with Squamous Cell Lung Carcinoma

Area of Science:

• Microbiome research
• Oncology
• Bacteriology

Background:

• The host microbiome influences lung cancer development through inflammation, dysbiosis, and genome damage.
• Identifying specific bacterial communities linked to lung squamous cell carcinoma (LUSC) is crucial.

Purpose of the Study:

• To investigate bacterial communities associated with LUSC.
• To compare the sputum microbiome of LUSC patients with healthy controls.

Main Methods:

• Comparative analysis of sputum microbiome composition in 40 LUSC patients and 40 healthy controls.
• Next-Generation sequencing of bacterial 16S rRNA genes for taxonomic profiling of the respiratory microbiome.

Main Results:

• No significant differences in alpha diversity between LUSC and control groups.
• Significant differences in bacterial community structure (beta diversity) in sputum samples from LUSC patients (pseudo-F = 1.53; p = 0.005).
• Enrichment of Streptococcus, Bacillus, Gemella, and Haemophilus genera in LUSC patients; reduction in 19 other genera.

Conclusions:

• Streptococcus, particularly Streptococcus agalactiae, is a potential biomarker for LUSC.
• Further research is required to validate Streptococcus as a reliable LUSC biomarker.