The full spectrum of holoprosencephaly-associated mutations within the ZIC2 gene in humans predicts loss-of-function as the predominant disease mechanism
✍ Scribed by Erich Roessler; Felicitas Lacbawan; Christèle Dubourg; Aimee Paulussen; Jos Herbergs; Ute Hehr; Claude Bendavid; Nan Zhou; Maia Ouspenskaia; Sherri Bale; Sylvie Odent; Vèronique David; Maximilian Muenke
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 254 KB
- Volume
- 30
- Category
- Article
- ISSN
- 1059-7794
No coin nor oath required. For personal study only.
✦ Synopsis
Mutations of the ZIC2 transcription factor gene are among the most common heterozygous variations detected in holoprosencephaly (HPE) patients, a patient group who lack critical midline forebrain specification due to defective embryonic signaling during development.
Recent studies indicate that complete deficiency of the related murine Zic2 transcription factor can also be a contributing factor to variable midline deficiencies, presenting during mid-gastrulation, that could explain similar forebrain anomalies in this model system. Here we collect and summarize all available mutations in the human ZIC2 gene detected in HPE patients (21 published and 62 novel). Our analysis corroborates this mechanism proposed in mice by predicting loss-offunction as the likely pathogenetic mechanism common to most, if not all, of these mutations in HPE.