{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,20]],"date-time":"2026-09-20T17:44:27Z","timestamp":1789926267090,"version":"4.0.1"},"reference-count":21,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2022,3,16]],"date-time":"2022-03-16T00:00:00Z","timestamp":1647388800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Neurol."],"abstract":"<jats:p>The Poirier\u2013Bienvenu neurodevelopmental syndrome is an autosomal dominant disorder characterized by intellectual disability and epilepsy. The disease is caused by mutations in the <jats:italic>CSNK2B<\/jats:italic> gene, which encodes the beta subunit of casein kinase II, and it has important roles in neuron development and synaptic transmission. In this study, five Chinese patients were diagnosed with Poirier\u2013Bienvenu neurodevelopmental syndrome caused by <jats:italic>CSNK2B<\/jats:italic> mutations by whole exome sequencing. We detected four different <jats:italic>de novo<\/jats:italic> variants of the <jats:italic>CSNK2B<\/jats:italic> gene in these five unrelated Chinese patients: two novel mutations, namely, c.100delT (p.Phe34fs<jats:sup>*<\/jats:sup>16) and c.158_159insA (p.Asp55fs<jats:sup>*<\/jats:sup>4), and two recurrent mutations, namely, c.1A&amp;gt;G (p.Met1?) and c.332 G &amp;gt;C (p.R111P). All five patients showed mild-to-profound intellectual disabilities\/or learning disabilities and developmental delays, with or without seizures. Although intellectual disability\/developmental delay and epilepsy are the most common manifestations of CSNK2B deficiency, the clinical phenotypes of probands are highly variable, and there is no significant correlation between genotype and phenotype. An abnormal stature may be another common manifestation of CSNK2B deficiency. Here, we report the effects of growth hormone (GH) therapy on the patients' linear height. In conclusion, Poirier\u2013Bienvenu neurodevelopmental syndrome is a highly heterogeneous disease caused by mutations in the <jats:italic>CSNK2B<\/jats:italic> gene. The phenotype was highly variable, and no significant correlation of genotype and phenotype was found. Patients with short-stature and CSNK2B deficiency may benefit from GH therapy. The identification and characterization of these novel variants will expand the genotypic and phenotypic spectrum of Poirier\u2013Bienvenu neurodevelopmental syndrome.<\/jats:p>","DOI":"10.3389\/fneur.2022.811092","type":"journal-article","created":{"date-parts":[[2022,3,16]],"date-time":"2022-03-16T04:29:39Z","timestamp":1647404979000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":13,"title":["De Novo CSNK2B Mutations in Five Cases of Poirier\u2013Bienvenu Neurodevelopmental Syndrome"],"prefix":"10.3389","volume":"13","author":[{"given":"Qi","family":"Yang","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qinle","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shang","family":"Yi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zailong","family":"Qin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fei","family":"Shen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shang","family":"Ou","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jingsi","family":"Luo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sheng","family":"He","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2022,3,16]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"932","DOI":"10.1002\/humu.23270","article-title":"CSNK2B splice site mutations in patients cause intellectual disability with or without myoclonic epilepsy","volume":"38","author":"Poirier","year":"2017","journal-title":"Hum Mutat."},{"key":"B2","doi-asserted-by":"publisher","first-page":"17909","DOI":"10.1038\/s41598-019-53484-9","article-title":"Germline de novo variants in CSNK2B in Chinese patients with epilepsy","volume":"9","author":"Li","year":"2019","journal-title":"Sci Rep."},{"key":"B3","doi-asserted-by":"publisher","first-page":"51","DOI":"10.1023\/A:1006840613986","article-title":"Interactions of protein kinase CK2beta subunit within the holoenzyme and with other proteins","volume":"191","author":"Kusk","year":"1999","journal-title":"Mol Cell Biochem."},{"key":"B4","doi-asserted-by":"publisher","first-page":"1212","DOI":"10.1016\/j.jmb.2009.01.033","article-title":"First inactive conformation of CK2 alpha, the catalytic subunit of protein kinase CK2","volume":"386","author":"Raaf","year":"2009","journal-title":"J Mol Biol."},{"key":"B5","doi-asserted-by":"publisher","first-page":"263","DOI":"10.1111\/j.1432-1033.1994.tb18622.x","article-title":"Recombinant human casein kinase II. 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