{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T23:25:14Z","timestamp":1777937114134,"version":"3.51.4"},"reference-count":34,"publisher":"SAGE Publications","issue":"4","license":[{"start":{"date-parts":[[2018,2,9]],"date-time":"2018-02-09T00:00:00Z","timestamp":1518134400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Mult Scler"],"published-print":{"date-parts":[[2019,4]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>CD59, a broadly expressed glycosylphosphatidylinositol-anchored protein, is the principal cell inhibitor of complement membrane attack on cells. In the demyelinating disorders, multiple sclerosis (MS) and neuromyelitis optica spectrum disorder (NMOSD), elevated complement protein levels, including soluble CD59 (sCD59), were reported in cerebrospinal fluid (CSF).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objectives:<\/jats:title>\n                    <jats:p>We compared sCD59 levels in CSF and matched plasma in controls and patients with MS, NMOSD and clinically isolated syndrome (CIS) and investigated the source of CSF sCD59 and whether it was microparticle associated.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>sCD59 was quantified using enzyme-linked immunosorbent assay (ELISA; Hycult; HK374-02). Patient and control CSF was subjected to western blotting to characterise anti-CD59-reactive materials. CD59 was localised by immunostaining and in situ hybridisation.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>CSF sCD59 levels were double those in plasma (CSF, 30.2 ng\/mL; plasma, 16.3 ng\/mL). Plasma but not CSF sCD59 levels differentiated MS from NMOSD, MS from CIS and NMOSD\/CIS from controls. Elimination of microparticles confirmed that CSF sCD59 was not membrane anchored.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>CSF levels of sCD59 are not a biomarker of demyelinating diseases. High levels of sCD59 in CSF relative to plasma suggest an intrathecal source; CD59 expression in brain parenchyma was low, but expression was strong on choroid plexus (CP) epithelium, immediately adjacent the CSF, suggesting that this is the likely source.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/1352458518758927","type":"journal-article","created":{"date-parts":[[2018,2,9]],"date-time":"2018-02-09T04:48:22Z","timestamp":1518151702000},"page":"523-531","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":7,"title":["Measurement of soluble CD59 in CSF in demyelinating disease: Evidence for an intrathecal source of soluble CD59"],"prefix":"10.1177","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2230-3550","authenticated-orcid":false,"given":"Wioleta M","family":"Zelek","sequence":"first","affiliation":[{"name":"Systems Immunity Research Institute, School of Medicine, Cardiff University, Cardiff, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lewis M","family":"Watkins","sequence":"additional","affiliation":[{"name":"Institute of Life Science (ILS), Swansea University Medical School, Swansea, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Owain W","family":"Howell","sequence":"additional","affiliation":[{"name":"Institute of Life Science (ILS), Swansea University Medical School, Swansea, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rhian","family":"Evans","sequence":"additional","affiliation":[{"name":"Institute of Life Science (ILS), Swansea University Medical School, Swansea, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sam","family":"Loveless","sequence":"additional","affiliation":[{"name":"Division of Psychological Medicine and Clinical Neurosciences, School of Medicine, Cardiff University, Cardiff, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Neil 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