{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,27]],"date-time":"2026-08-27T16:13:11Z","timestamp":1787847191775,"version":"build-2784847793"},"reference-count":33,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2021,2,18]],"date-time":"2021-02-18T00:00:00Z","timestamp":1613606400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100012774","name":"Innovationsfonden","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100012774","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J Cutan Pathol"],"published-print":{"date-parts":[[2021,7]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>\n                      Filaggrin is a protein integral to the structure and function of the epidermis.\n                      <jats:italic>Filaggrin<\/jats:italic>\n                      (\n                      <jats:italic>FLG<\/jats:italic>\n                      ) loss\u2010of\u2010function (LOF) mutations are common and increase the risk of developing atopic dermatitis (AD) and ichthyosis vulgaris (IV). Epidemiologic data suggest a link between skin cancer and AD. We examined if FLG staining pattern can be used to characterize cutaneous squamous cell carcinomas (SCC), basal cell carcinomas (BCC), and reactive squamous epithelium.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Tissue microarrays (TMAs) were created from 196 cases of formalin\u2010fixed paraffin\u2010embedded (FFPE) SCC and 144 BCC cases. TMAs and sections of reactive squamous epithelium were stained with optimized anti\u2010FLG antibody and evaluated for FLG expression (normal, abnormal, or negative).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      FLG was absent in poorly differentiated (PD) compared to well\u2010differentiated (WD) SCC (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0&lt;\u2009.0001) and moderately\u2010differentiated (MD) (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0=\u2009.0231) SCC, and in MD compared to WD SCC (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0=\u2009.0099). Abnormal staining was significantly increased in PD compared to WD cases (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0=\u2009.0039) and in MD compared to WD cases (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0=\u2009.0006). Most BCC did not exhibit FLG expression (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0&lt;\u2009.05). Reactive squamous epithelium demonstrated normal, but exaggerated FLG expression.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Our findings demonstrate the differences in FLG expression patterns in types of keratinocyte carcinomas and their mimickers.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/cup.13975","type":"journal-article","created":{"date-parts":[[2021,2,6]],"date-time":"2021-02-06T03:26:34Z","timestamp":1612581994000},"page":"877-883","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Filaggrin expression via immunohistochemistry in basal cell carcinoma and squamous cell carcinoma"],"prefix":"10.1111","volume":"48","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4365-6387","authenticated-orcid":false,"given":"Kaitlin","family":"Vanderbeck","sequence":"first","affiliation":[{"name":"Department of Pathology and Molecular Medicine Kingston Health Sciences Centre  Kingston Ontario Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christine E.","family":"Orr","sequence":"additional","affiliation":[{"name":"Department of Pathology and Molecular Medicine Kingston Health Sciences Centre  Kingston Ontario Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nikoo","family":"Parvinnejad","sequence":"additional","affiliation":[{"name":"Department of Pathology and Laboratory Medicine University of Calgary  Calgary Alberta Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tao","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Pathology and Molecular Medicine Kingston Health Sciences Centre  Kingston Ontario Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Scott","family":"Bradshaw","sequence":"additional","affiliation":[{"name":"Department of Pathology and Molecular Medicine Kingston Health Sciences Centre  Kingston Ontario Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ami","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Pathology and Molecular Medicine Kingston Health Sciences Centre  Kingston Ontario Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuka","family":"Asai","sequence":"additional","affiliation":[{"name":"Division of Dermatology, Department of Medicine Kingston Health Sciences Centre and Queen's University  Kingston Ontario 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