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Breath Res."],"published-print":{"date-parts":[[2024,10,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Noninvasive sample sources of exosomes, such as exhaled breath and sputum, which are in close proximity to the tumor microenvironment and may contain biomarkers indicative of lung cancer, are far more permissive than invasive sample sources for biomarker screening. Standardized exosome extraction and characterization approaches for low-volume noninvasive samples are critically needed. We isolated and characterized exhaled breath condensate (EBC) and sputum exosomes from healthy nonsmokers (<jats:italic>n<\/jats:italic> = 30), tobacco smokers (<jats:italic>n<\/jats:italic> = 30), and lung cancer patients (<jats:italic>n<\/jats:italic> = 40) and correlated the findings with invasive sample sources. EBC samples were collected by using commercially available R-Tubes. To collect sputum samples the participants were directed to take deep breaths, hold their breath, and cough in a collection container. Dynamic light scattering, nanoparticle tracking analysis, and transmission electron microscopy were used to evaluate the exosome morphology. Protein isolation, western blotting, exosome quantification via EXOCET, and Fourier transform infrared spectroscopy were performed for molecular characterization. Exosomes were successfully isolated from EBC and sputum samples, and their yields were adequate and sufficiently pure for subsequent downstream processing and characterization. The exosomes were confirmed based on their size, shape, and surface marker expression. Remarkably, cancer exosomes were the largest in size not only in the plasma subgroups, but also in the EBC (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05) and sputum (<jats:italic>p<\/jats:italic> = 0.0036) subgroups, according to our findings. A significant difference in exosome concentrations were observed between the control sub-groups (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05). Our research confirmed that exosomes can be extracted from noninvasive sources, such as EBC and sputum, to investigate lung cancer diagnostic biomarkers for research, clinical, and early detection in smokers.<\/jats:p>","DOI":"10.1088\/1752-7163\/ad5eae","type":"journal-article","created":{"date-parts":[[2024,7,11]],"date-time":"2024-07-11T08:13:30Z","timestamp":1720685610000},"page":"046003","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":5,"title":["Extraction and characterization of exosomes from the exhaled breath condensate and sputum of lung cancer patients and vulnerable tobacco consumers\u2014potential noninvasive diagnostic biomarker source"],"prefix":"10.1088","volume":"18","author":[{"given":"Afsareen","family":"Bano","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pooja","family":"Yadav","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Megha","family":"Sharma","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Deepika","family":"Verma","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ravina","family":"Vats","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dhruva","family":"Chaudhry","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pawan","family":"Kumar","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7045-0830","authenticated-orcid":true,"given":"Rashmi","family":"Bhardwaj","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"266","published-online":{"date-parts":[[2024,7,11]]},"reference":[{"key":"jbrad5eaebib1","doi-asserted-by":"publisher","first-page":"157","DOI":"10.1038\/s41422-020-00409-1","article-title":"RAB31 marks and controls an ESCRT-independent exosome pathway","volume":"31","author":"Wei","year":"2021","journal-title":"Cell Res."},{"key":"jbrad5eaebib2","doi-asserted-by":"publisher","first-page":"21","DOI":"10.1186\/s12943-022-01499-8","article-title":"A signature of saliva-derived exosomal small RNAs as predicting biomarker for esophageal carcinoma: a multicenter prospective study","volume":"21","author":"Li","year":"2021","journal-title":"Mol. 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All rights, including for text and data mining, AI training, and similar technologies, are reserved.","name":"copyright_information","label":"Copyright Information"},{"value":"2024-02-29","name":"date_received","label":"Date Received","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2024-07-03","name":"date_accepted","label":"Date Accepted","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2024-07-11","name":"date_epub","label":"Online publication date","group":{"name":"publication_dates","label":"Publication dates"}}]}}