Long term follow-up in a patient with a de novo microdeletion of 14q11.2 involving CHD8.
We identified a de novo deletion of 14q11.2 in a Czech patient with developmental delay, mild autistic features, macrosomy, macrocephaly, orthognathic deformities, and dysmorphic facial features. The clinical follow-up of the patient lasting 14 years documented changes in the facial dysmorphism from infancy to adolescence. The deletion affects approximately 200 kb of DNA with five protein-coding genes and two snoRNA genes. Two of the protein-coding genes, SUPT16H and CHD8, have been proposed as candidate genes for a new microdeletion syndrome. Our patient further supports the existence of this syndrome and extends its phenotypic spectrum, especially points to the possibility that orthognathic deformities may be associated with microdeletions of 14q11.2. CHD8 mutations have been found in patients with neurodevelopmental disorders and macrocephaly. The HNRNPC gene, repeatedly deleted in patients with developmental delay, is another candidate as its 5́ end is adjacent to the deletion, and the expression of this gene may be affected by position effect.
Department of Biology and Medical Genetics, Charles University 2nd Faculty of Medicine and University Hospital Motol, Prague, Czech Republic.
Jana
J
Drabova
Eva
E
Seemanova
Miroslava
M
Hancarova
Radka
R
Pourova
Martin
M
Horacek
Tereza
T
Jancuskova
Sona
S
Pekova
Drahuse
D
Novotna
Zdenek
Z
Sedlacek
D000015:Abnormalities, Multiple / Q000175:diagnosis* / Q000235:genetics; D000293:Adolescent; D002872:Chromosome Deletion; D002883:Chromosomes, Human, Pair 14 / Q000235:genetics*; D004268:DNA-Binding Proteins / Q000235:genetics*; D002658:Developmental Disabilities / Q000175:diagnosis / Q000235:genetics; D005500:Follow-Up Studies; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis / Q000235:genetics; D008297:Male; D058627:Megalencephaly / Q000175:diagnosis / Q000235:genetics; D014157:Transcription Factors / Q000235:genetics*
C523331:CHD8 protein, human; D004268:DNA-Binding Proteins; D014157:Transcription Factors
CHD8; Microdeletion 14q11.2; SUPT16H; intellectual disability; macrocephaly; orthognathic deformities