{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T21:30:33Z","timestamp":1790803833289,"version":"4.1.0"},"reference-count":58,"publisher":"Oxford University Press (OUP)","issue":"4","license":[{"start":{"date-parts":[[2024,8,1]],"date-time":"2024-08-01T00:00:00Z","timestamp":1722470400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"funder":[{"DOI":"10.13039\/100001003","name":"Boehringer Ingelheim","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100001003","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100001003","name":"Boehringer Ingelheim","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100001003","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["www.atsjournals.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2024,8,15]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Rationale<\/jats:title>\n                    <jats:p>Idiopathic pulmonary fibrosis (IPF) affects the subpleural lung but is considered to spare small airways. Micro\u2013computed tomography (micro-CT) studies demonstrated small airway reduction in end-stage IPF explanted lungs, raising questions about small airway involvement in early-stage disease. Endobronchial optical coherence tomography (EB-OCT) is a volumetric imaging modality that detects microscopic features from subpleural to proximal airways.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objectives<\/jats:title>\n                    <jats:p>In this study, EB-OCT was used to evaluate small airways in early IPF and control subjects in vivo.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>EB-OCT was performed in 12 subjects with IPF and 5 control subjects (matched by age, sex, smoking history, height, and body mass index). Subjects with IPF had early disease with mild restriction (FVC: 83.5% predicted), which was diagnosed per current guidelines and confirmed by surgical biopsy. EB-OCT volumetric imaging was acquired bronchoscopically in multiple, distinct, bilateral lung locations (total: 97 sites). IPF imaging sites were classified by severity into affected (all criteria for usual interstitial pneumonia present) and less affected (some but not all criteria for usual interstitial pneumonia present). Bronchiole count and small airway stereology metrics were measured for each EB-OCT imaging site.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Measurements and Main Results<\/jats:title>\n                    <jats:p>Compared with the number of bronchioles in control subjects (mean\u2009=\u200911.2\/cm3; SD\u2009=\u20096.2), there was significant bronchiole reduction in subjects with IPF (42% loss; mean\u2009=\u20096.5\/cm3; SD\u2009=\u20093.4; P\u2009=\u20090.0039), including in IPF affected (48% loss; mean: 5.8\/cm3; SD: 2.8; P\u2009&amp;lt;\u20090.00001) and IPF less affected (33% loss; mean: 7.5\/cm3; SD: 4.1; P\u2009=\u20090.024) sites. Stereology metrics showed that IPF-affected small airways were significantly larger, more distorted, and more irregular than in IPF-less affected sites and control subjects. IPF less affected and control airways were statistically indistinguishable for all stereology parameters (P\u2009=\u20090.36\u20131.0).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>EB-OCT demonstrated marked bronchiolar loss in early IPF (between 30% and 50%), even in areas minimally affected by disease, compared with matched control subjects. These findings support small airway disease as a feature of early IPF, providing novel insight into pathogenesis and potential therapeutic targets.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1164\/rccm.202401-0249oc","type":"journal-article","created":{"date-parts":[[2024,5,15]],"date-time":"2024-05-15T09:25:30Z","timestamp":1715765130000},"page":"473-483","update-policy":"https:\/\/doi.org\/10.1164\/crossmarkpolicies","source":"Crossref","is-referenced-by-count":24,"title":["Microscopic Small Airway Abnormalities Identified in Early Idiopathic Pulmonary Fibrosis\n                    <i>In Vivo<\/i>\n                    Using Endobronchial Optical Coherence Tomography"],"prefix":"10.1093","volume":"210","author":[{"given":"Sarita R.","family":"Berigei","sequence":"first","affiliation":[{"name":"Division of Pulmonary and Critical Care 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G.","family":"Auchincloss","sequence":"additional","affiliation":[{"name":"Division of Thoracic Surgery"},{"name":"Harvard Medical School, Boston, Massachusetts"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Henning","family":"Gaissert","sequence":"additional","affiliation":[{"name":"Division of Thoracic Surgery"},{"name":"Harvard Medical School, Boston, Massachusetts"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6049-1276","authenticated-orcid":false,"given":"Michael","family":"Lanuti","sequence":"additional","affiliation":[{"name":"Division of Thoracic Surgery"},{"name":"Harvard Medical School, Boston, Massachusetts"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Harald C.","family":"Ott","sequence":"additional","affiliation":[{"name":"Division of Thoracic Surgery"},{"name":"Harvard Medical School, Boston, 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