Jacopo Mariani, Simona Iodice, Laura Cantone, Giulia Solazzo, Paolo Marraccini, Emanuele Conforti, Pallav A. Bulsara, Maria Stella Lombardi, Robert P. Howlin, Valentina Bollati and Luca Ferrari
Int J Environ Res Public Health. 2021 Oct 12;18(20):10689. doi: 10.3390/ijerph182010689.
Particulate matter (PM) exposure is known to worsen respiratory conditions, namely allergic rhinitis. Allergic rhinitis prevalence is rising, affecting the quality of life. The objective of this study was to investigate the molecular mechanisms beneath the triggering of nasal and systemic inflammation by particulate matter, specifically the release of plasmatic extracellular vesicles and the relation between the host and nasal microbiome.
The study included 26 participants with allergic rhinitis and 24 matched healthy participants, whose reaction to PM10 and PM25 exposure was assessed on the bacteria-derived-extracellular vesicles portion (bEV) and the host-derived-extracellular vesicles (hEV), and also on the bacterial nasal microbiome (bNM). The function of bNM as a modifier of PM effects on the extracellular vesicles signaling network in the context of allergic rhinitis was also evaluated.
This study has shown an association between particulate matter exposure in participants with allergic rhinitis, both in the context of bNM composition and plasmatic extracellular vesicles release, affecting in different ways the release of extracellular vesicles and the composition of bNM. More studies are needed to better understand the link between particulate matter exposure and bNM modulation and plasmatic extracellular vesicles release and characterize the different responses observed in participants after particulate matter exposure.
