{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,25]],"date-time":"2025-09-25T15:49:30Z","timestamp":1758815370270,"version":"3.37.3"},"reference-count":22,"publisher":"Oxford University Press (OUP)","issue":"9","license":[{"start":{"date-parts":[[2010,9,1]],"date-time":"2010-09-01T00:00:00Z","timestamp":1283299200000},"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\/100000002","name":"NIH","doi-asserted-by":"publisher","award":["ADB-NO1-DK-6-3430","HHSN267200603430"],"award-info":[{"award-number":["ADB-NO1-DK-6-3430","HHSN267200603430"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000030","name":"CDC","doi-asserted-by":"publisher","award":["1U01EH000362"],"award-info":[{"award-number":["1U01EH000362"]}],"id":[{"id":"10.13039\/100000030","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2010,9,1]]},"abstract":"<jats:sec>\n                  <jats:title>BACKGROUND<\/jats:title>\n                  <jats:p>Severe combined immunodeficiency (SCID) fulfills many of the requirements for addition to a newborn screening panel. Two newborn screening SCID pilot studies are now underway using the T-cell receptor excision circle (TREC) assay, a molecular technique. Here we describe an immunoassay with CD3 as a marker for T cells and CD45 as a marker for total leukocytes that can be used with the Guthrie specimen.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>METHODS<\/jats:title>\n                  <jats:p>The multiplexing capabilities of the Luminex platform were used. Antibody pairs were used to capture and detect CD3 and CD45 from a single 3-mm punch of the Guthrie specimen. The assay for each biomarker was developed separately in identical buffers and then combined to create a multiplex assay.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>RESULTS<\/jats:title>\n                  <jats:p>Using calibrators made from known amounts of leukocytes, a detection limit of 0.25 \u00d7 106 cells\/mL for CD3 and 0.125 \u00d7 106 cells\/mL for CD45 was obtained. Affinity tests showed no cross-reactivity between the antibodies to CD3 and CD45. The multiplex assay was validated against 8 coded specimens of known clinical status and linked to results from the TREC assay that had identified them. All were correctly identified by the CD345 assay.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>CONCLUSIONS<\/jats:title>\n                  <jats:p>The performance parameters of the CD345 assay met the performance characteristics generally accepted for immunoassays. Our assay classifications of positive specimens concur with previous TREC results. This CD345 assay warrants evaluation as a viable alternative or complement to the TREC assay as a primary screening tool for detecting T-cell immunodeficiencies, including SCID, in Guthrie specimens.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1373\/clinchem.2010.144329","type":"journal-article","created":{"date-parts":[[2010,7,21]],"date-time":"2010-07-21T22:22:18Z","timestamp":1279750938000},"page":"1460-1465","source":"Crossref","is-referenced-by-count":16,"title":["A Multiplex Immunoassay Using the Guthrie Specimen to Detect T-Cell Deficiencies Including Severe Combined Immunodeficiency Disease"],"prefix":"10.1093","volume":"56","author":[{"given":"David K","family":"Janik","sequence":"first","affiliation":[{"name":"Biggs Laboratory, Wadsworth Center, Department of Health, NYS"},{"name":"Department of Biomedical Sciences, School of Public Health, University at Albany, Albany, New 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