Immunoglobulin A (IgA)
Secretory Immunoglobulin A (IgA) is found in tears, sweat, saliva, milk, colostrum, and in gastrointestinal and bronchial secretions. It protects the mucosa from bacteria and viruses. The presence of secretory IgA also affects the development of allergic (IgE) reactions to various ingested antigens by binding the antigens and preventing IgE responses. Increased serum IgA is common in patients with skin, gut, respiratory, renal infections and in ARC/AIDS. In portal cirrhosis, IgA and sometimes IgG are increased. Deficiency of IgA is found in one in 750 individuals. Absence of this immunoglobulin is also found in ataxia telangiectasia. A significant number of IgA-deficient individuals will have circulating anti-IgA, which can mediate fatal anaphylactoid reactions when sources of immunoglobulin are infused (e.g., blood component therapy).
Swiss-Prot Accession Number: P01876, P01877
PublicationsNBAS variants are associated with quantitative and qualitative NK and B cell deficiency (2021) Lenz, D, Pahl J, Hauck F, Alameer S, Balasubramanian M, Baric I, Boy N, Church JA, Crushell E, Dick A, Distelmaier F, Gujar J, Indolfi G, Lurz E, Peters B, Schwerd T, Serranti D, Kolker S, Klein C, Hoffmann GF, Prokisch H, Greil J, Cerwenka A, Giese T Staufner C Journal of Clinical Immunology
SLE Plasma Profiling Identifies Unique Signatures of Lupus Nephritis and Discoid Lupus (2019) Smith MA, Henault J, Karnell JL, Parker ML, Riggs JM, Sinibaldi D, Taylor DK, Ettinger R, Grant EP, Sanjuan MA, Kolbeck R, Petri MA, Casey KA Scientific Reports
Extracorporeal apheresis therapy for Alzheimer disease-targeting lipids, stress, and inflammation (2019) Bornstein SR, Voit-Bak K, Rosenthal P, Tselmin S, Julius U, Schatz U, Boehm BO, Thuret S, Kempermann G, Reichmann H, Chrousos GP, Licinio J, Wong ML, Schally AV, Straube R Molecular Psychiatry
Dendritic cell immunotherapy followed by cART interruption during HIV-1 infection induces plasma protein markers of cellular immunity and neutrophil recruitment (2018) van den Ham HJ, Cooper J, Tomasik J, Bahn S, Aerts J, Oseterhaus A, Gruters R, Andeweg A PLoS One
Lower serum IgA is associated with COPD exacerbation risk in SPIROMICS (2018) Putcha N, Paul GG, Azar A, Wise RA, O'Neal WK, Dransfield MT, Woodruff PG, Curtis JL, Comellas AP, Drummond MB, Lambert AA, Paulin LM, Fawzy A, Kanner RE, Paine R 3rd, Han MK, Martinez FJ, Bowler RP, Barr RG, Hansel NN, SPIROMICS investigators PLoS One
Anemia and Adverse Outcomes in a Chronic Obstructive Pulmonary Disease Population with a High Burden of Comorbidities (2018) Putcha N, Fawzy A, Paul GG, Lambert AA, Psoter KJ, Sidhaye VK, Woo J, Wells JM, Labaki WW, Doerschuk CM, Kanner RE, Han MK, Martinez C, Paulin LM, Martinez FJ, Wise RA, O'Neal WK, Barr RG, Hansei NN AnnalsATS
Serum Apolipoprotein E and Other Inflammatory Markers Can Identify Non-Responding Patients to a Dendritic Cell Vaccine (2018) Leeman H, Kaminska E, Green D, Bodman-Smith M, Gravett A, Bodman-Smith K, Copier J, Coulton G, Fusi A, Dalgleish AG Translational Oncology
High false-positive rate of a putative biomarker test to aid in the diagnosis of schizophrenia (2016) Wehler CA, Preskorn, SH Journal of Clinical Psychiatry
Assessment of Urine Proteomics in Type 1 Primary Hyperoxaluria*American Journal of Nephrology (2016) Brooks ER, Hoppe B, Milliner DS, Salido E, Rim J, Krevitt LM, Olson JB, Price HE, Vural G, Langman CB American Journal of Nephrology
Sjögren’s Syndrome Patients with Ectopic Germinal Centers Present with a Distinct Salivary Proteome (2016) Delaleu N, Mydel P, Brun JG, Jonsson MV, Alimonti A, Jonsson R Rheumatology
Variation in Serum Biomarkers with Sex and Female Hormonal Status: Implications for Clinical Tests (2016) Ramsey JM, Cooper JD, Penninx BWJH, Bahn S Scientific Reports
Identifying amyloid pathology–related cerebrospinal fluid biomarkers for Alzheimer's disease in a multicohort study (2015) Leung YY, Toledo JB, Nefedov A, Polikar R, Raghavan N, Xie SX, Farnum M, Schultz T, Baek Y, Deerlin VV, Hu WT, Holtzman DM, Fagan AM, Perrin RJ, Grossman M, Soares HD, Kling MA, Mailman M, Arnold SE, Narayan VA, Lee VMY, Shaw LM, Baker D, Wittenberg GM, Trojanowski JQ, Wang LS Alzheimer's & Dementia
Development of a Blood-Based Molecular Biomarker Test for Identification of Schizophrenia before Disease Onset (2015) Chan MK, Krebs MO, Cox D, Guest PC, Yolken RH, Rahmoune H, Rothermundt M, Steiner J, Leweke FM, Van Beveren NJM, Niebuhr DW, Weber NS, Cowan DN, Suarez-Pinilla P, Crespo-Facorro B, Mam-Lam-Fook C, Bourgin J, Wenstrup RJ, Kaldate RR, Cooper JD, Bahn S Translational Psychiatry
Serum proteomic analysis identifies sex-specific differences in lipid metabolism and inflammation profiles in adults diagnosed with Asperger syndrome (2014) Steeb H, Ramsey JM, Guest PC, Stocki P, Cooper JD, Rahmoune H, Ingudomnukul E, Auyeung B, Ruta L, Baron-Cohen S, Bahn S Mol Autism. 2014 Jan 27;5(1):4
Serum proteomic analysis identifies sex-specific differences in lipid metabolism and inflammation profiles in adults diagnosed with Asperger syndrome (2014) Steeb H, Ramsey JM, Guest PC, Stocki P, Cooper JD, Rahmoune H, Ingudomnukul E, Auyeung B, Ruta L, Baron-Cohen S, Bahn S Mol Autism. 2014 Jan 27;5(1):4
Peripheral profiling analysis for bipolar disorder reveals markers associated with reduced cell survival (2011) Herberth M, Koethe D, Levin Y, Schwarz E, Krzyszton ND, Schoeffmann S, Ruh H, Rahmoune H, Kranaster L, Schoenborn T, Leweke MF, Guest PC, Bahn S Proteomics 11: 94-105.
Validation of a Blood-Based Laboratory Test to Aid in the Confirmation of a Diagnosis of Schizophrenia (2010) Schwarz E, Izmailov R, Spain M, Barnes A, Mapes JP, Guest PC, Rahmoune H, Pietsch S, Leweke FM, Rothermundt M, Steiner J, Koethe D, Kranaster L, Ohrmann P, Suslow T, Levin Y, Bogerts B, (JM) van Beveren N, McAllister G, Weber N, Niebuhr D, Cowan D, Yolken RH, Bahn S Biomark Insights5: 39–47.
Plasma biomarkers in carbon monoxide poisoning. (2010) Thom SR, Bhopale VM, Milovanova TM, Hardy KR, Logue CJ, Lambert DS, Troxel AB, Ballard K, Eisinger D Clin Toxicol (Phila) 48: 47-56.