{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,17]],"date-time":"2026-07-17T12:09:08Z","timestamp":1784290148126,"version":"3.55.0"},"reference-count":15,"publisher":"BMJ","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Med Genet"],"accepted":{"date-parts":[[2010,9,13]]},"published-print":{"date-parts":[[2011,2]]},"abstract":"\n Background<\/jats:title>\n Mutations of the SET binding protein 1 gene (SETBP1<\/jats:italic>) on 18q12.3 have recently been reported to cause Schinzel\u2013Giedion syndrome (SGS). As rare 18q interstitial deletions affecting multiple genes including SETBP1<\/jats:italic> correlate with a milder phenotype, including minor physical anomalies and developmental and expressive speech delay, mutations in SETBP1<\/jats:italic> are thought to result in a gain-of-function or a dominant-negative effect. However, the consequence of the SETBP1<\/jats:italic> loss-of-function has not yet been well described.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n Microarray-based comparative genomic hybridisation (aCGH) analyses were performed to identify genetic causes for developmental and expressive speech delay in two patients. SETBP1 expression in fibroblasts obtained from one of the patients was analysed by real-time RT-PCR and western blotting. A cohort study to identify nucleotide changes in SETBP1<\/jats:italic> was performed in 142 Japanese patients with developmental delay.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n aCGH analyses identified submicroscopic deletions of less than 1\u2005Mb exclusively containing SETBP1<\/jats:italic>. Both patients show global developmental, expressive language delay and minor facial anomalies. Decreased expression of SETBP1 was identified in the patient's skin fibroblasts. No pathogenic mutation of SETBP1<\/jats:italic> was identified in the cohort study.<\/jats:p>\n <\/jats:sec>\n \n Conclusion<\/jats:title>\n SETBP1 expression was reduced in a patient with SETBP1<\/jats:italic> haploinsufficiency, indicating that the SETBP1<\/jats:italic> deletion phenotype is allele dose sensitive. In correlation with the exclusive deletion of SETBP1<\/jats:italic>, this study delimits a milder phenotype distinct from SGS overlapping with the previously described phenotype of del(18)(q12.2q21.1) syndrome including global developmental, expressive language delay and distinctive facial features. These findings support the hypothesis that mutations in SETBP1<\/jats:italic> causing SGS may have a gain-of-function or a dominant-negative effect, whereas haploinsufficiency or loss-of-function mutations in SETBP1<\/jats:italic> cause a milder phenotype.<\/jats:p>\n <\/jats:sec>","DOI":"10.1136\/jmg.2010.084582","type":"journal-article","created":{"date-parts":[[2010,10,30]],"date-time":"2010-10-30T20:34:36Z","timestamp":1288470876000},"page":"117-122","source":"Crossref","is-referenced-by-count":79,"title":["Reduced expression by SETBP1<\/i> haploinsufficiency causes developmental and expressive language delay indicating a phenotype distinct from Schinzel\u2013Giedion 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caused by a paternal sister chromatid rearrangement in a developmentally delayed girl","volume":"135","author":"Kotzot","year":"2005","journal-title":"Am J Med Genet A"},{"key":"2025100511191533000_48.2.117.8","doi-asserted-by":"crossref","first-page":"1858","DOI":"10.1002\/ajmg.a.31850","article-title":"Genotype-phenotype mapping of chromosome 18q deletions by high-resolution array CGH: an update of the phenotypic map","volume":"143A","author":"Feenstra","year":"2007","journal-title":"Am J Med Genet A"},{"key":"2025100511191533000_48.2.117.9","doi-asserted-by":"publisher","DOI":"10.1002\/ajmg.a.31729"},{"key":"2025100511191533000_48.2.117.10","doi-asserted-by":"publisher","DOI":"10.1002\/ajmg.a.32267"},{"key":"2025100511191533000_48.2.117.11","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2141.2006.06410.x"},{"key":"2025100511191533000_48.2.117.12","doi-asserted-by":"crossref","first-page":"1340","DOI":"10.1046\/j.1432-1327.2001.02000.x","article-title":"Identification and 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