{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,17]],"date-time":"2026-08-17T14:53:52Z","timestamp":1786978432804,"version":"build-2736575974"},"reference-count":42,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2019,1,16]],"date-time":"2019-01-16T00:00:00Z","timestamp":1547596800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"JSPS Grant-in-Aid for Scientific Research","award":["#16 K10141"],"award-info":[{"award-number":["#16 K10141"]}]}],"content-domain":{"domain":["pathsocjournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["The Journal of Pathology"],"published-print":{"date-parts":[[2019,3]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Immunoglobulins (Igs) consist of two antigen\u2010binding regions (Fab) and one constant region (Fc). Protein A and protein G are bacterial proteins used for the purification of IgG by virtue of their high affinities for the Fc fragment. Rheumatoid factors are autoantibodies against IgG Fc fragments, which are present in the body under physiological conditions. Little is known about the influence of Fc\u2010binding proteins on the pathogenicity of antibody\u2010induced autoimmune diseases. Pemphigoid diseases are a group of autoimmune subepidermal blistering disorders that includes bullous pemphigoid and mucous membrane pemphigoid. IgGs targeting the non\u2010collagenous NC16A domain of the 180\u2010kDa bullous pemphigoid antigen (BP180) are known to induce skin fragility in mice and the depletion of BP180 in keratinocytes. In this study, mAb against NC16A in combination with Fc\u2010binding proteins was found to enhance BP180 depletion. Although mAb against the C\u2010terminus of BP180 does not show pathogenicity\n                    <jats:italic>in vivo<\/jats:italic>\n                    or\n                    <jats:italic>in vitro<\/jats:italic>\n                    , mAb treatment with Fc\u2010binding proteins clearly induced skin fragility in mice and BP180 depletion in keratinocytes. Anti\u2010BP180 mAbs and Fc\u2010binding proteins were colocalized in the cytoplasm and at the basement membrane zone. Cell adhesion strengths were decreased in parallel with BP180 amounts. Clinically, bullous pemphigoid patients had higher rheumatoid factor titers than controls. Anti\u2010BP180 mAb in combination with high\u2010titer rheumatoid factor serum was found to enhance BP180 depletion. Furthermore, saliva from mucous membrane pemphigoid patients contained larger quantities of bacteria and Fc\u2010binding proteins than controls. Our results suggest that Fc\u2010binding proteins (rheumatoid factor or protein G) may enhance the pathogenicity of autoantibodies in pemphigoid diseases. Copyright \u00a9 2018 Pathological Society of Great Britain and Ireland. Published by John Wiley &amp; Sons, Ltd.\n                  <\/jats:p>","DOI":"10.1002\/path.5196","type":"journal-article","created":{"date-parts":[[2018,11,14]],"date-time":"2018-11-14T03:57:29Z","timestamp":1542167849000},"page":"371-380","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Fc\u2010binding proteins enhance autoantibody\u2010induced BP180 depletion in pemphigoid"],"prefix":"10.1002","volume":"247","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8781-2735","authenticated-orcid":false,"given":"Hiroaki","family":"Iwata","sequence":"first","affiliation":[{"name":"Department of Dermatology Hokkaido University Graduate School of Medicine  Sapporo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4055-9047","authenticated-orcid":false,"given":"Mayumi","family":"Kamaguchi","sequence":"additional","affiliation":[{"name":"Department of Dermatology Hokkaido 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