Journal
MEDICINA-LITHUANIA
Volume 57, Issue 8, Pages -Publisher
MDPI
DOI: 10.3390/medicina57080823
Keywords
upper airways; microbiota; dysbiosis; inflammation; airborne exposures; age; environmental exposure; disease
Categories
Funding
- Flight Attendant Medical Research Institute [CIA160005]
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The microbiota of the upper airways plays a crucial role in maintaining homeostasis and is impacted by environmental pollution, inflammation, and disease. The composition of the microbiota is associated with airborne exposures, diseases, and inflammatory conditions, influencing normal respiratory development and function.
Along with playing vital roles in pathogen exclusion and immune system priming, the upper airways (UAs) and their microbiota are essential for myriad physiological functions such as conditioning and transferring inhaled air. Dysbiosis, a microbial imbalance, is linked with various diseases and significantly impedes the quality of one's life. Daily inhaled exposures and/or underlying conditions contribute to adverse changes to the UA microbiota. Such variations in the microbial community exacerbate UA and pulmonary disorders via modulating inflammatory and immune pathways. Hence, exploring the UA microbiota's role in maintaining homeostasis is imperative. The microbial composition and subsequent relationship with airborne exposures, inflammation, and disease are crucial for strategizing innovating UA diagnostics and therapeutics. The development of a healthy UA microbiota early in life contributes to normal respiratory development and function in the succeeding years. Although different UA cavities present a unique microbial profile, geriatrics have similar microbes across their UAs. This lost community segregation may contribute to inflammation and disease, as it stimulates disadvantageous microbial-microbial and microbial-host interactions. Varying inflammatory profiles are associated with specific microbial compositions, while the same is true for many disease conditions and environmental exposures. A shift in the microbial composition is also detected upon the administration of numerous therapeutics, highlighting other beneficial and adverse side effects. This review examines the role of the UA microbiota in achieving homeostasis, and the impact on the UAs of environmental airborne pollutants, inflammation, and disease.
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