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RUNX2 quadruplication: additional evidence toward a new form of syndromic craniosynostosis.

Authors:
Matthew R Greives Eric A Odessey Darrel J Waggoner Deana S Shenaq Swaroop Aradhya Allison Mitchell Emma Whitcomb Neil Warshawsky Tong-Chuan He Russell R Reid

J Craniofac Surg 2013 Jan;24(1):126-9

Department of Surgery, and †Genetics; ‡Pediatrics, Comer Children's Hospital, University of Chicago Medical Center, Chicago, IL 60637, USA.

The RUNX2 transcription factor regulates osteoblast differentiation. Its absence, as with cleidocranial dysplasia, results in deficient bone formation. However, its excess seems to follow a dose response of over ossification. RUNX2 duplications (3 copies) are exceedingly rare but have been reported to cause craniosynostosis. There are no existing reports of quadruplications (4 copies). We present a case study of a boy with an atypical skull deformity with pan-craniosynostosis whose microarray analysis revealed 4 copies of a 1.24-Mb region from 6p12.3 to 6p21.1 containing the RUNX2 gene. Further characterization of this osteogenic pathway may aid in our understanding of the pathogenesis and subsequent prevention and treatment of syndromic craniosynostosis.

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http://dx.doi.org/10.1097/SCS.0b013e31826686d3DOI Listing
January 2013

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