{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T17:27:36Z","timestamp":1791912456445,"version":"4.3.4"},"reference-count":16,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2025,4,16]],"date-time":"2025-04-16T00:00:00Z","timestamp":1744761600000},"content-version":"vor","delay-in-days":15,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2025,4,1]],"date-time":"2025-04-01T00:00:00Z","timestamp":1743465600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100003042","name":"Else Kr\u00f6ner-Fresenius-Stiftung","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100003042","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100005224","name":"Deutsches Zentrum f\u00fcr Neurodegenerative Erkrankungen","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100005224","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Euro J of Neurology"],"published-print":{"date-parts":[[2025,4]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Seed amplification assays (SAA) detect alpha\u2010synuclein (aSYN) pathology in patient biomatrices such as cerebrospinal fluid (CSF)\u2014potentially even before clinical manifestations. As CSF\u2010based SAA are approaching broader use in clinical trials and research, ensuring that different laboratories obtain the same results becomes increasingly important.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>In this cross\u2010laboratory, cross\u2010aSYN\u2010recombinant substrate and cross\u2010protocol round\u2010robin test, we compared SAA results from a common set of 38 CSF samples measured independently in four research laboratories of the German Center for Neurodegenerative diseases. Three laboratories (A\u2013C) used an assay protocol adapted from Parchi's group at ISNB (Bologna, Italy); laboratory D used an assay protocol adapted from Amprion Inc. Two different manufacturers of aSYN protein were used as substrates for the SAA reaction.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Qualitative results were identical in at least three of the four laboratories for 37 out of 38 samples (20 positive, 17 negative). Fleiss Kappa for all four laboratories was 0.751 (\n                      <jats:italic>z<\/jats:italic>\n                      \u2009=\u200912,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001). For each laboratory, agreement with laboratory A was &gt;\u200992%. For the number of positive replicates, Fleiss Kappa was 0.45 for a score of zero positive replicates and 0.42 for a score of four positive replicates.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>The qualitative SAA results showed a high level of agreement across research laboratories, aSYN monomers, and assay protocols. Small differences between laboratories were systematic, consistent with the notion that SAA reports biologically relevant properties. These results also underline that round\u2010robin tests can be helpful in assessing and ensuring SAA quality across laboratories.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/ene.70165","type":"journal-article","created":{"date-parts":[[2025,4,28]],"date-time":"2025-04-28T04:40:38Z","timestamp":1745815238000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["High Agreement Across Laboratories Between Different Alpha\u2010Synuclein Seed Amplification Protocols"],"prefix":"10.1111","volume":"32","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2449-5530","authenticated-orcid":false,"given":"Stefan","family":"Br\u00e4uer","sequence":"first","affiliation":[{"name":"German Center for Neurodegenerative Diseases (DZNE)  Dresden Germany"},{"name":"Department of Neurology Technische Universit\u00e4t  Dresden 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