Exosomes in the nose induce immune cell trafficking and harbour an altered protein cargo in chronic airway inflammation

Journal of Translational Medicine

Research

Yong Song Gho¹  Bo Lundbäck²  Serena E. O’Neil²  Cecilia Lässer²  Jan Lötvall²  Ganesh V. Shelke²  Carina Sihlbom³  Sara F. Hansson³ 

[1] Department of Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea;Krefting Research Centre, Department of Internal Medicine and Clinical Nutrition, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden;Proteomics Core Facility, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden;

关键词: Asthma;    Chronic rhinosinusitis;    Exclusion list;    Exosomes;    Extracellular vesicles;    Cell migration;    Mass spectrometry;    Nasal lavage fluid;    Proteomics;    Tandem mass tags;   

DOI  :  10.1186/s12967-016-0927-4

 received in 2015-10-09, accepted in 2016-05-30,  发布年份 2016

来源: Springer

【 摘 要 】

BackgroundExosomes are nano-sized extracellular vesicles participating in cell-to-cell communication both in health and disease. However, the knowledge about the functions and molecular composition of exosomes in the upper airways is limited. The aim of the current study was therefore to determine whether nasal exosomes can influence inflammatory cells and to establish the proteome of nasal lavage fluid-derived exosomes in healthy subjects, as well as its alterations in individuals with chronic airway inflammatory diseases [asthma and chronic rhinosinusitis (CRS)].MethodsNasal lavage fluid was collected from 14 healthy subjects, 15 subjects with asthma and 13 subjects with asthma/CRS. Exosomes were isolated with differential centrifugation and the proteome was analysed by LC–MS/MS with the application of two exclusion lists as well as using quantitative proteomics. Ingenuity Pathways Analysis and GO Term finder was used to predict the functions associated with the exosomal proteome and a migration assay was used to analyse the effect on immune cells by nasal exosomes.ResultsFirstly, we demonstrate that nasal exosomes can induce migration of several immune cells, such as monocytes, neutrophils and NK cells in vitro. Secondly, a mass spectrometry approach, with the application of exclusion lists, was utilised to generate a comprehensive protein inventory of the exosomes from healthy subjects. The use of exclusion lists resulted in the identification of ~15 % additional proteins, and increased the confidence in ~20 % of identified proteins. In total, 604 proteins were identified in nasal exosomes and the nasal exosomal proteome showed strong associations with immune-related functions, such as immune cell trafficking. Thirdly, a quantitative proteomics approach was used to determine alterations in the exosome proteome as a result of airway inflammatory disease. Serum-associated proteins and mucins were more abundant in the exosomes from subjects with respiratory diseases compared to healthy controls while proteins with antimicrobial functions and barrier-related proteins had decreased expression.ConclusionsNasal exosomes were shown to induce the migration of innate immune cells, which may be important as the airway epithelium is the first line of defence against pathogens and allergens. The decreased expression in barrier and antimicrobial exosomal proteins in subjects with airway diseases, could possibly contribute to an increased susceptibility to infections, which have important clinical implications in disease progression.

【 授权许可】

CC BY   
© The Author(s) 2016