{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,14]],"date-time":"2025-10-14T07:08:15Z","timestamp":1760425695964,"version":"3.37.3"},"reference-count":32,"publisher":"Oxford University Press (OUP)","issue":"3","license":[{"start":{"date-parts":[[2019,2,27]],"date-time":"2019-02-27T00:00:00Z","timestamp":1551225600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"funder":[{"DOI":"10.13039\/501100006668","name":"Spanish Ministry for Health, non-oriented research program, Fondo de Investigaci\u00f3n de la Seguridad Social","doi-asserted-by":"publisher","award":["FIS-PI10\/00337"],"award-info":[{"award-number":["FIS-PI10\/00337"]}],"id":[{"id":"10.13039\/501100006668","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2019,5,14]]},"abstract":"<jats:title>Summary<\/jats:title>\n               <jats:p>The major histocompatibility complex (MHC) class I-related chain A (MICA) is induced upon stress, and labels malfunctioning cells for their recognition by cytotoxic lymphocytes. Alterations in this recognition and also abnormal natural killer (NK) functions have been found in systemic lupus erythematosus (SLE). MICA can be shed from cells, subsequently acting as a soluble decoy receptor (sMICA). Our purpose was to study circulating sMICA levels in relationship with the activation of innate pathways in PBMC in a cohort of lupus patients. NK cells were characterized by flow cytometry. Gene expression of Toll-like receptors (TLR), interferon (IFN)-I sensitive genes and MICA were separately analyzed in monocytes, T cells and B cells. Serum sMICA was measured with enzyme-linked immunosorbent assay (ELISA). In our cohort, NK cell counts dropped in relationship with disease activity. sMICA showed an inverse trend with NK cell counts, as well as a significant association with activity indices, but not with complement decrease. Levels of sMICA associated to proteinuria and active nephritis. A multivariate regression model revealed anti-nuclear antibody (ANA) titres, the up-regulation of TLR-4 in T cells and lower vitamin D as predictors of sMICA enhancement. Interestingly, vitamin D showed an inverse association with proteinuria and a strong correlation with T cell MICA mRNA levels. According to our data, circulating sMICA identifies a subgroup of lupus patients with low vitamin D, innate activation of T cells and nephritis. We propose that lymphocyte shedding could account for the enhancement of sMICA and reflect an immune evasion mechanism driving disease activation in lupus.<\/jats:p>","DOI":"10.1111\/cei.13273","type":"journal-article","created":{"date-parts":[[2019,2,9]],"date-time":"2019-02-09T04:18:54Z","timestamp":1549685934000},"page":"336-344","source":"Crossref","is-referenced-by-count":8,"title":["A subgroup of lupus patients with nephritis, innate T cell activation and low vitamin D is identified by the enhancement of circulating MHC class I-related chain A"],"prefix":"10.1093","volume":"196","author":[{"given":"M","family":"P\u00e9rez-Ferro","sequence":"first","affiliation":[{"name":"Fundaci\u00f3n Jim\u00e9nez D\u00edaz University Hospital and Research Institute, Autonoma University, Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"F I","family":"Romero-Bueno","sequence":"additional","affiliation":[{"name":"Fundaci\u00f3n Jim\u00e9nez D\u00edaz University Hospital and Research Institute, Autonoma University, Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C","family":"Serrano del Castillo","sequence":"additional","affiliation":[{"name":"Fundaci\u00f3n Jim\u00e9nez D\u00edaz University Hospital and Research Institute, Autonoma University, Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"I","family":"Mahillo","sequence":"additional","affiliation":[{"name":"Fundaci\u00f3n Jim\u00e9nez D\u00edaz University Hospital and Research Institute, Autonoma University, Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A","family":"Alvear","sequence":"additional","affiliation":[{"name":"Fundaci\u00f3n Jim\u00e9nez D\u00edaz University Hospital and Research Institute, Autonoma University, Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6525-2944","authenticated-orcid":false,"given":"R","family":"Largo","sequence":"additional","affiliation":[{"name":"Fundaci\u00f3n Jim\u00e9nez D\u00edaz University Hospital and Research Institute, Autonoma University, Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"G","family":"Herrero-Beaumont","sequence":"additional","affiliation":[{"name":"Fundaci\u00f3n Jim\u00e9nez D\u00edaz University Hospital and Research Institute, Autonoma University, Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9894-5699","authenticated-orcid":false,"given":"O","family":"S\u00e1nchez-Pernaute","sequence":"additional","affiliation":[{"name":"Fundaci\u00f3n Jim\u00e9nez D\u00edaz University Hospital and Research Institute, Autonoma University, Madrid, 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