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Related Experiment Video

Updated: Apr 30, 2026

Identification of OTX1 and OTX2 As Two Possible Molecular Markers for Sinonasal Carcinomas and Olfactory Neuroblastomas
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OTX2 duplication is implicated in hemifacial microsomia.

Dina Zielinski1, Barak Markus1, Mona Sheikh1

  • 1Whitehead Institute for Biomedical Research, Cambridge, Massachusetts, United States of America.

Plos One
|May 13, 2014
PubMed
Summary
This summary is machine-generated.

A large duplication on chromosome 14q22.3 is linked to hemifacial microsomia (HFM). This finding implicates the OTX2 gene in craniofacial development and suggests a potential link between HFM and medulloblastoma.

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Area of Science:

  • Genetics
  • Developmental Biology
  • Medical Genetics

Background:

  • Hemifacial microsomia (HFM) is a common congenital facial anomaly with variable presentation.
  • Most HFM cases are sporadic, indicating diverse genetic causes.

Purpose of the Study:

  • To identify the genetic cause of HFM in a large, multi-generational family.
  • To investigate the role of OTX2 in craniofacial development.

Main Methods:

  • Whole-exome sequencing to rule out point mutations.
  • Genome-wide analysis of segmental variations to detect chromosomal duplications.
  • Bioinformatic analysis integrating human disease networks and mouse expression data.

Main Results:

  • A 1.3 Mb duplication at chromosome 14q22.3 was identified in all affected individuals.
  • The duplication was absent in controls and other sporadic HFM cases.
  • OTX2 was identified as the most likely causal gene within the duplicated region.

Conclusions:

  • Dosage sensitivity of OTX2 plays a role in human craniofacial development.
  • A subtype of HFM may share an etiology with medulloblastoma, given OTX2's role in both conditions.