Quantitative 18F-fluorodeoxyglucose positron emission tomography/computed tomography to assess pulmonary inflammation in COPD

Autor: Laurence Vass, Marie Fisk, Joseph Cheriyan, Divya Mohan, Julia Forman, Adelola Oseni, Anand Devaraj, Kaisa M. Mäki-Petäjä, Carmel M. McEniery, Jonathan Fuld, Nicholas S. Hopkinson, David A. Lomas, John R. Cockcroft, Ruth Tal-Singer, Michael I. Polkey, Ian B. Wilkinson
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: ERJ Open Research, Vol 7, Iss 3 (2021)
Druh dokumentu: article
ISSN: 2312-0541
23120541
DOI: 10.1183/23120541.00699-2020
Popis: Rationale COPD and smoking are characterised by pulmonary inflammation. 18F-fluorodeoxyglucose positron emission tomography/computed tomography (FDG PET/CT) imaging may improve knowledge of pulmonary inflammation in COPD patients and aid early development of novel therapies as an imaging biomarker. Objectives To evaluate pulmonary inflammation, assessed by FDG uptake, in whole and regional lung in “usual” (smoking-related) COPD patients, alpha-1 antitrypsin deficiency (α1ATD) COPD patients, smokers without COPD and never-smokers using FDG PET/CT. Secondly, to explore cross-sectional associations between FDG PET/CT and systemic inflammatory markers in COPD patients and repeatability of the technique in COPD patients. Methods Data from two imaging studies were evaluated. Pulmonary FDG uptake (normalised Ki; nKi) was measured by Patlak graphical analysis in four subject groups: 84 COPD patients, 11 α1ATD-COPD patients, 12 smokers and 10 never-smokers. Within the COPD group, associations between nKi and systemic markers of inflammation were assessed. Repeatability was evaluated in 32 COPD patients comparing nKi values at baseline and at 4-month follow-up. Results COPD patients, α1ATD-COPD patients and smokers had increased whole lung FDG uptake (nKi) compared with never-smokers (0.0037±0.001, 0.0040±0.001, 0.0040±0.001 versus 0.0028±0.001 mL·cm−3·min−1, respectively, p
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