Crosstalk between the lung microbiome and lung cancer.

The human microbiome is a complex ecosystem that mediates interaction between the human host and the environment. All of the human body is colonized by microorganisms. The lung as an organ used to be considered sterile. Recently, however, there has been a growing number of reports with evidence that the lungs are also in a state of carrying bacteria. The pulmonary microbiome is associated with many lung diseases and is increasingly reported in current studies. These include; chronic obstructive pulmonary disease (COPD), asthma, acute chronic respiratory infections, and cancers. These lung diseases are associated with reduced diversity and dysbiosis. It directly or indirectly affects the occurrence and development of lung cancer. Very few microbes directly cause cancer, while many are complicit in cancer growth, usually working through the host's immune system. This review focuses on the correlation between lung microbiota and lung cancer, and investigates the mechanism of action of lung microorganisms on lung cancer, which will provide new and reliable treatments and diagnosis of lung cancer in the future.

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Declaration of competing interest The authors declare that there is no conflict of interest regarding the publication of this paper.