In the clinic Autoimmunity in cystic fibrosis: significance and clinical implications Kenneth Iwuji MD, Sharan Bijlani BA, Rose Izuchi MD, David Sotello MD ABSTRACT Anti-neutrophil cytoplasmic antibodies specific for bactericidal/permeability-increasing protein (BPI-ANCA) are frequently present in cystic fibrosis patients. These autoantibodies are believed to develop in response to infection and colonization by Pseudomonas aeruginosa. Development of BPI-ANCA has been shown to correlate with the severity of lung infection and poor prognosis in cystic fibrosis patients. Keywords: Anti-neutrophil cytoplasmic antibodies, autoimmune disease, inflammation, bactericidal/permeability-increasing protein, cystic fibrosis, Pseudomonas aeruginosa Article citation: Iwuji K, Bijlani S, Izuchi R, Sotello D. Autoimmunity in cystic fibrosis: significance and clinical implications. The Southwest Respiratory and Critical Care Chronicles. 2018;6(23):48–50 From: Department of Internal Medicine at Texas Tech University Health Sciences Center, Lubbock, TX Submitted: 2/14/2018 Accepted: 3/23/2018 Reviewer: Adaobi Kanu MD, John Pixley MD Conflicts of interest: None This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License