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Breath Res."],"published-print":{"date-parts":[[2018,4,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Water vapor in expired air, as well as dispersed non-volatile components, condense onto a cooler surface after exiting the respiratory tract. This exhaled breath condensate (EBC) provides a dilute sampling of the epithelial lining fluid. Accordingly, the collection of EBC imparts a capacity to provide biomarkers of injury preceding clinical disease. Concentrations of transition and post-transition metals in EBC are included among these endpoints. Iron and zinc are the metals with the highest concentration and are measurable in all EBC samples from healthy subjects; other metals are most frequently either at or below the level of detection in this group. Gender, age, and smoking can impact EBC metal concentrations in healthy subjects. EBC metal concentrations among patients diagnosed with particular lung diseases (e.g. asthma, chronic obstructive disease, and interstitial lung disease) have been of research interest but no definite pattern of involvement has been delineated. Studies of occupationally exposed workers confirm significant exposure to specific metals, but such EBC metal measurements frequently provide evidence redundant with environmental sampling. Measurements of metal concentrations in EBC remain a research tool into metal homeostasis in the respiratory tract and participation of metals in disease pathogenesis. The quantification of metal concentrations in EBC is currently not reliable for clinical use in either supporting or determining any diagnosis. Issues that must be addressed prior to the use of EBC metal measurements include the establishment of both standardized collection and measurement techniques.<\/jats:p>","DOI":"10.1088\/1752-7163\/aaa214","type":"journal-article","created":{"date-parts":[[2017,12,15]],"date-time":"2017-12-15T09:17:01Z","timestamp":1513329421000},"page":"027112","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":19,"title":["Transition and post-transition metals in exhaled breath condensate"],"prefix":"10.1088","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0502-6448","authenticated-orcid":false,"given":"Andrew J","family":"Ghio","sequence":"first","affiliation":[{"name":"National Health and Environmental Effects Research Laboratory, Environmental Protection Agency, Chapel Hill NC,"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael C","family":"Madden","sequence":"additional","affiliation":[{"name":"National Health and Environmental Effects Research Laboratory, Environmental Protection Agency, Chapel Hill NC,"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"suffix":"Jr","given":"Charles R","family":"Esther","sequence":"additional","affiliation":[{"name":"University of North Carolina"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"266","published-online":{"date-parts":[[2018,2,7]]},"reference":[{"key":"jbraaa214bib1","first-page":"391","type":"journal-article","article-title":"The internal surface area of the adult human lung","volume":"112","author":"Hasleton","year":"1972","journal-title":"J. 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