Identification of proteomic signatures associated with COPD frequent exacerbators

Publication date: Available online 20 May 2019Source: Life SciencesAuthor(s): Pengbo Sun, Ruin Ye, Cuihong Wang, Shuang Bai, Li ZhaoAbstractAimsAcute exacerbation is a major event that alters the natural course of chronic obstructive pulmonary disease (COPD), and recurrent exacerbation results in worse clinical outcomes and greater economic consequences. While some patients suffer frequent exacerbations, others experience no exacerbations; this study was designed to detect proteins that were differentially abundant in COPD frequent exacerbators and assess whether those expression profiles are unique among COPD patients.Main methodsTandem mass tag labeled quantitative proteomics combined with two-dimensional liquid chromatography-tandem mass spectrometry was used to detect the changes in the lung proteome in COPD frequent exacerbators and infrequent exacerbators. A series of bioinformatics analyses were performed to screen potential signatures of COPD frequent exacerbations. The accuracy of proteomic results was further verified by western blot studies.Key findingsCompared with infrequent exacerbators, 23 proteins in the lung tissues from frequent exacerbators showed significant degrees of differential expression; combined bioinformatics analyses of proteome indicated that the immune network for IgA production and the phenylalanine metabolism pathway were associated with frequent exacerbations. The Western blot analysis confirmed the expression pattern of three significantly r...
Source: Life Sciences - Category: Biology Source Type: research