TY - JOUR T1 - Insulin-Like Growth Factors and IGF-Binding Proteins levels in serum from smokers and patients with different grades of COPD, COPD and lung cancer and exacerbated COPD JF - European Respiratory Journal JO - Eur Respir J DO - 10.1183/13993003.congress-2021.PA1952 VL - 58 IS - suppl 65 SP - PA1952 AU - Iciar Paula Lopez Garcia AU - Elvira Alfaro-Arnedo AU - Marta Canalejo AU - Alfredo Urtubia AU - Alejandra Roncero AU - Carlos Ruiz-Martínez AU - Andreas Hoeflich AU - Christine Höflich AU - Carolina Gotera AU - German Peces Barba AU - Jose G Pichel Y1 - 2021/09/05 UR - http://erj.ersjournals.com/content/58/suppl_65/PA1952.abstract N2 - Context: Members of the insulin-like growth factor (IGF) system, including IGF1 and 2 and IGF binding proteins (IGFBPs), are involved in lung homeostasis and respiratory diseases, including COPD.Aim: To compare levels of IGF components in serum between groups of patients with different COPD status, smoking habit and controls.Methods: Serum levels of IGF1 and IGF2, and IGFBP2 to 5, measured by ELISA and immunoblotting, were compared between seven groups of patients (n=200): healthy controls (n=30), smokers (n=30), mild-COPD (n=30), moderate-COPD (n=30), severe-COPD (n=23), COPD+lung cancer (n=21) and exacerbated-COPD (n=36).Results: While IGF1 concentration was increased in smokers respect to controls and exacerbated-COPD patients, IGF2 was reduced in exacerbated-COPD respect to all groups, in COPD+lung cancer group respect to controls and smokers, and in severe-COPD respect to controls. IGFBP2 levels were elevated in both exacerbated-COPD, respect the rest of groups except COPD+lung cancer, and in COPD+lung cancer respect to controls, smokers and severe COPD. In contrast, IGFBP3 and IGFBP5 levels were reduced in exacerbated COPD with respect the rest of groups. The ratio fragmented/intact IGFBP3 was increased in smokers and exacerbated-COPD. Levels of IGFBP4 were significantly increased in COPD+lung cancer respect the rest of groups except smokers.Conclusion: Serum levels of IGF components changed with COPD status. IGFBP2 and 3 showed opposed serum concentration profiles in COPD. While IGFBP4 was upregulated in COPD+lung cancer, variations in IGFs and IGBP2 and 3 levels were more marked in exacerbated-COPD.FootnotesCite this article as: European Respiratory Journal 2021; 58: Suppl. 65, PA1952.This abstract was presented at the 2021 ERS International Congress, in session “Prediction of exacerbations in patients with COPD”.This is an ERS International Congress abstract. No full-text version is available. Further material to accompany this abstract may be available at www.ers-education.org (ERS member access only). ER -