{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,30]],"date-time":"2026-04-30T09:12:10Z","timestamp":1777540330666,"version":"3.51.4"},"reference-count":215,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2019,12,5]],"date-time":"2019-12-05T00:00:00Z","timestamp":1575504000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Antibodies"],"abstract":"<jats:p>Immunoglobulin A (IgA) plays a key role in defending mucosal surfaces against attack by infectious microorganisms. Such sites present a major site of susceptibility due to their vast surface area and their constant exposure to ingested and inhaled material. The importance of IgA to effective immune defence is signalled by the fact that more IgA is produced than all the other immunoglobulin classes combined. Indeed, IgA is not just the most prevalent antibody class at mucosal sites, but is also present at significant concentrations in serum. The unique structural features of the IgA heavy chain allow IgA to polymerise, resulting in mainly dimeric forms, along with some higher polymers, in secretions. Both serum IgA, which is principally monomeric, and secretory forms of IgA are capable of neutralising and removing pathogens through a range of mechanisms, including triggering the IgA Fc receptor known as Fc\u03b1RI or CD89 on phagocytes. The effectiveness of these elimination processes is highlighted by the fact that various pathogens have evolved mechanisms to thwart such IgA-mediated clearance. As the structure\u2013function relationships governing the varied capabilities of this immunoglobulin class come into increasingly clear focus, and means to circumvent any inherent limitations are developed, IgA-based monoclonal antibodies are set to emerge as new and potent options in the therapeutic arena.<\/jats:p>","DOI":"10.3390\/antib8040057","type":"journal-article","created":{"date-parts":[[2019,12,5]],"date-time":"2019-12-05T11:16:23Z","timestamp":1575544583000},"page":"57","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":223,"title":["IgA: Structure, Function, and Developability"],"prefix":"10.3390","volume":"8","author":[{"given":"Patr\u00edcia","family":"de Sousa-Pereira","sequence":"first","affiliation":[{"name":"School of Life Sciences, University of Dundee, Dundee DD1 5EH, UK"},{"name":"CIBIO-InBIO, Campus Agr\u00e1rio de Vair\u00e3o, University of Porto, 4485-661 Vair\u00e3o, Portugal"}]},{"given":"Jenny M.","family":"Woof","sequence":"additional","affiliation":[{"name":"School of Life Sciences, University of Dundee, Dundee DD1 5EH, UK"}]}],"member":"1968","published-online":{"date-parts":[[2019,12,5]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"105","DOI":"10.1016\/0090-1229(86)90073-5","article-title":"The human IgA system: A reassessment","volume":"40","author":"Mestecky","year":"1986","journal-title":"Clin. 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