Abstract:
BACKGROUND:Primary microcephaly is defined as reduced occipital-frontal circumference noticeable before 36 weeks of gestation. Large amount of insults might lead to microcephaly including infections, hypoxia and genetic mutations. More than 16 genes are described in autosomal recessive primary microcephaly. However, the cause of microcephaly remains unclear in many cases after extensive investigations and genetic screening. CASE PRESENTATION:Here, we described the case of a boy with primary microcephaly who presented to a neurology clinic with short stature, global development delay, dyskinetic movement, strabismus and dysmorphic features. We performed microcephaly investigations and genetic panels. Then, we performed whole-exome sequencing to identify any genetic cause. Microcephaly investigations and genetic panels were negative, but we found a new D317V homozygous mutation in TELOE-2 interacting protein 2 (TTI2) gene by whole-exome sequencing. TTI2 is implicated in DNA damage response and mutation in that gene was previously described in mental retardation, autosomal recessive 39. CONCLUSIONS:We described the first French Canadian case with primary microcephaly and global developmental delay secondary to a new D317V homozygous mutation in TTI2 gene. Our report also highlights the importance of TTI2 protein in brain development.
journal_name
BMC Neuroljournal_title
BMC neurologyauthors
Picher-Martel V,Labrie Y,Rivest S,Lace B,Chrestian Ndoi
10.1186/s12883-020-01643-1subject
Has Abstractpub_date
2020-02-15 00:00:00pages
58issue
1issn
1471-2377pii
10.1186/s12883-020-01643-1journal_volume
20pub_type
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