title: Molecular Profiling in Lung Biopsies of Human Pulmonary Allografts to Predict Chronic Lung Allograft Dysfunction.
abstract: Chronic lung allograft dysfunction (CLAD) is the main reason for poor long-term outcome of lung transplantation, with bronchiolitis obliterans (BO) representing the predominant pathological feature. BO is defined as a progressive fibrous obliteration of the small airways, thought to be triggered by a combination of nonimmune bronchial injury and alloimmune and autoimmune mechanisms. Because biopsy samples are too insensitive to reliably detect BO and a decline in lung function test results, which is clinically used to define CLAD, does not detect early stages, there is need for alternative biomarkers for early diagnosis. Herein, we analyzed the cellular composition and differential expression of 45 tissue remodeling-associated genes in transbronchial lung biopsy specimens from two cohorts with 18 patients each: patients who did not develop CLAD within 3 years after transplantation (48 biopsy specimens) and patients rapidly developing CLAD within the first 3 postoperative years (57 biopsy specimens). Integrating the mRNA expression levels of the five most significantly dysregulated genes from the transforming growth factor-β axis (BMP4, IL6, MMP1, SMAD1, and THBS1) into a score, patient groups could be confidently separated and the outcome predicted (P < 0.001). We conclude that overexpression of fibrosis-associated genes may be valuable as a tissue-based molecular biomarker to more accurately diagnose or predict the development of CLAD.
authors.affiliation: Institute of Pathology, Hanover Medical School, Hanover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease, the Hanover Division of the German Center for Lung Research, Gießen, Germany. Electronic address: jonigk.danny@mh-hannover.de.
authors.forename: Danny
authors.initials: D
authors.lastname: Jonigk
authors.affiliation: Institute of Pathology, Hanover Medical School, Hanover, Germany.
authors.forename: Nicole
authors.initials: N
authors.lastname: Izykowski
authors.affiliation: Institute of Pathology, Hanover Medical School, Hanover, Germany.
authors.forename: Johanna
authors.initials: J
authors.lastname: Rische
authors.affiliation: Institute of Pathology, Hanover Medical School, Hanover, Germany.
authors.forename: Peter
authors.initials: P
authors.lastname: Braubach
authors.affiliation: Institute of Functional and Applied Anatomy, Hanover Medical School, Hanover, Germany.
authors.forename: Mark
authors.initials: M
authors.lastname: Kühnel
authors.affiliation: Biomedical Research in Endstage and Obstructive Lung Disease, the Hanover Division of the German Center for Lung Research, Gießen, Germany; Department of Thoracic Surgery, Hanover Medical School, Hanover, Germany.
authors.forename: Gregor
authors.initials: G
authors.lastname: Warnecke
authors.affiliation: Institute of Pathology, Hanover Medical School, Hanover, Germany.
authors.forename: Torsten
authors.initials: T
authors.lastname: Lippmann
authors.affiliation: Institute of Pathology, Hanover Medical School, Hanover, Germany.
authors.forename: Hans
authors.initials: H
authors.lastname: Kreipe
authors.affiliation: Biomedical Research in Endstage and Obstructive Lung Disease, the Hanover Division of the German Center for Lung Research, Gießen, Germany; Department of Thoracic Surgery, Hanover Medical School, Hanover, Germany.
authors.forename: Axel
authors.initials: A
authors.lastname: Haverich
authors.affiliation: Biomedical Research in Endstage and Obstructive Lung Disease, the Hanover Division of the German Center for Lung Research, Gießen, Germany; Department of Respiratory Medicine, Hanover Medical School, Hanover, Germany.
authors.forename: Tobias
authors.initials: T
authors.lastname: Welte
authors.affiliation: Biomedical Research in Endstage and Obstructive Lung Disease, the Hanover Division of the German Center for Lung Research, Gießen, Germany; Department of Respiratory Medicine, Hanover Medical School, Hanover, Germany.
authors.forename: Jens
authors.initials: J
authors.lastname: Gottlieb
authors.affiliation: Institute of Pathology, Hanover Medical School, Hanover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease, the Hanover Division of the German Center for Lung Research, Gießen, Germany.
authors.forename: Florian
authors.initials: F
authors.lastname: Laenger
mesh_terms: D000328:Adult; D015415:Biomarkers / Q000378:metabolism*; D001706:Biopsy / Q000379:methods; D001989:Bronchiolitis Obliterans / Q000175:diagnosis* / Q000209:etiology / Q000235:genetics / Q000473:pathology; D002452:Cell Count; D042241:Early Diagnosis; D005260:Female; D015870:Gene Expression; D020869:Gene Expression Profiling / Q000379:methods; D006084:Graft Rejection / Q000175:diagnosis / Q000235:genetics / Q000473:pathology; D006801:Humans; D008168:Lung / Q000378:metabolism* / Q000473:pathology; D016040:Lung Transplantation / Q000009:adverse effects*; D016676:Macrophages, Alveolar / Q000473:pathology; D008297:Male; D008875:Middle Aged; D012333:RNA, Messenger / Q000235:genetics; D012189:Retrospective Studies; D055815:Young Adult
chemical_list: D015415:Biomarkers; D012333:RNA, Messenger