{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T02:07:32Z","timestamp":1780452452987,"version":"3.54.1"},"reference-count":17,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2021,9,29]],"date-time":"2021-09-29T00:00:00Z","timestamp":1632873600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJNS"],"abstract":"<jats:p>Purine nucleoside phosphorylase (PNP) deficiency is a rare inherited disorder, resulting in severe combined immunodeficiency. To date, PNP deficiency has been detected in newborn screening only through the use of liquid chromatography tandem mass spectrometry. We report the first case in which PNP deficiency was detected by TREC analysis.<\/jats:p>","DOI":"10.3390\/ijns7040062","type":"journal-article","created":{"date-parts":[[2021,10,11]],"date-time":"2021-10-11T21:47:34Z","timestamp":1633988854000},"page":"62","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Early Diagnosis and Treatment of Purine Nucleoside Phosphorylase (PNP) Deficiency through TREC-Based Newborn Screening"],"prefix":"10.3390","volume":"7","author":[{"given":"Andrea","family":"Mart\u00edn-Nalda","sequence":"first","affiliation":[{"name":"Pediatric Infectious Diseases and Immunodeficiencies Unit, Hospital Universitari Vall d\u2019Hebron, Vall d\u2019Hebron Research Institute (VHIR), Universitat Aut\u00f2noma de Barcelona, 08035 Barcelona, Spain"},{"name":"Immunology Division, Hospital Universitari Vall d\u2019Hebron, Institut de Recerca Vall d\u2019Hebron, Universitat Aut\u00f2noma de Barcelona, 08035 Barcelona, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1055-2063","authenticated-orcid":false,"given":"Jacques G.","family":"Rivi\u00e8re","sequence":"additional","affiliation":[{"name":"Pediatric Infectious Diseases and Immunodeficiencies Unit, Hospital Universitari Vall d\u2019Hebron, Vall d\u2019Hebron Research Institute (VHIR), Universitat Aut\u00f2noma de Barcelona, 08035 Barcelona, Spain"},{"name":"Immunology Division, Hospital Universitari Vall d\u2019Hebron, Institut de Recerca Vall d\u2019Hebron, Universitat Aut\u00f2noma de Barcelona, 08035 Barcelona, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2655-3458","authenticated-orcid":false,"given":"Mireia","family":"Catal\u00e0-Besa","sequence":"additional","affiliation":[{"name":"Pediatric Infectious Diseases and Immunodeficiencies Unit, Hospital Universitari Vall d\u2019Hebron, Vall d\u2019Hebron Research 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