{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,31]],"date-time":"2025-12-31T18:40:03Z","timestamp":1767206403457,"version":"build-2238731810"},"reference-count":73,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2022,3,10]],"date-time":"2022-03-10T00:00:00Z","timestamp":1646870400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001870","name":"Fundacja na rzecz Nauki Polskiej","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100001870","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004281","name":"Narodowe Centrum Nauki","doi-asserted-by":"publisher","award":["2013\/09\/N\/NZ6\/02405"],"award-info":[{"award-number":["2013\/09\/N\/NZ6\/02405"]}],"id":[{"id":"10.13039\/501100004281","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Mol. Biosci."],"abstract":"<jats:p>\n                    Deficiency in a principal epidermal barrier protein, filaggrin (FLG), is associated with multiple allergic manifestations, including atopic dermatitis and contact allergy to nickel. Toxicity caused by dermal and respiratory exposures of the general population to nickel-containing objects and particles is a deleterious side effect of modern technologies. Its molecular mechanism may include the peptide bond hydrolysis in X\n                    <jats:sub>1<\/jats:sub>\n                    -S\/T-c\/p-H-c-X\n                    <jats:sub>2<\/jats:sub>\n                    motifs by released Ni\n                    <jats:sup>2+<\/jats:sup>\n                    ions. The goal of the study was to analyse the distribution of such cleavable motifs in the human proteome and examine FLG vulnerability of nickel hydrolysis. We performed a general bioinformatic study followed by biochemical and biological analysis of a single case, the FLG protein. FLG model peptides, the recombinant monomer domain human keratinocytes\n                    <jats:italic>in vitro<\/jats:italic>\n                    and human epidermis\n                    <jats:italic>ex vivo<\/jats:italic>\n                    were used. We also investigated if the products of filaggrin Ni\n                    <jats:sup>2+<\/jats:sup>\n                    -hydrolysis affect the activation profile of Langerhans cells. We found X\n                    <jats:sub>1<\/jats:sub>\n                    -S\/T-c\/p-H-c-X\n                    <jats:sub>2<\/jats:sub>\n                    motifs in 40% of human proteins, with the highest abundance in those involved in the epidermal barrier function, including FLG. We confirmed the hydrolytic vulnerability and pH-dependent Ni\n                    <jats:sup>2+<\/jats:sup>\n                    -assisted cleavage of FLG-derived peptides and FLG monomer, using\n                    <jats:italic>in vitro<\/jats:italic>\n                    cell culture and\n                    <jats:italic>ex-vivo<\/jats:italic>\n                    epidermal sheets; the hydrolysis contributed to the pronounced reduction in FLG in all of the models studied. We also postulated that Ni-hydrolysis might dysregulate important immune responses. Ni\n                    <jats:sup>2+<\/jats:sup>\n                    -assisted cleavage of barrier proteins, including FLG, may contribute to clinical disease associated with nickel exposure.\n                  <\/jats:p>","DOI":"10.3389\/fmolb.2022.828674","type":"journal-article","created":{"date-parts":[[2022,3,10]],"date-time":"2022-03-10T06:08:45Z","timestamp":1646892525000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":5,"title":["Ni2+-Assisted Hydrolysis May Affect the Human Proteome; Filaggrin Degradation Ex Vivo as an Example of Possible Consequences"],"prefix":"10.3389","volume":"9","author":[{"given":"Ewa Izabela","family":"Podobas","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Danuta","family":"Gutowska-Owsiak","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S\u00e9bastien","family":"Moretti","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jaros\u0142aw","family":"Pozna\u0144ski","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mariusz","family":"Kuli\u0144czak","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marcin","family":"Grynberg","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Aleksandra","family":"Gruca","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Arkadiusz","family":"Bonna","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dawid","family":"P\u0142onka","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tomasz","family":"Fr\u0105czyk","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Graham","family":"Ogg","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wojciech","family":"Bal","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1965","published-online":{"date-parts":[[2022,3,10]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"1672","DOI":"10.1017\/s1431927607079652","article-title":"ImageJ as an Image Processing Tool and Library","volume":"13","author":"Abramoff","year":"2007","journal-title":"Micros. 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