Communication Sciences and Disorders Commons^™

Overt Cleft Palate Phenotype And Tbx1 Genotype Correlations In Velo-Cardio-Facial/Digeorge/22q11.2 Deletion Syndrome Patients, Sean Herman, Tingwei Guo, Donna Mcdonald Mcginn, Anna Blonska, Alan Shanske, Anne Bassett, Eva Chow, Mark Bowser, Molly Sheridan, Frits Beemer, Koen Devriendt, Ann Swillen, Jeroen Breckpot, Maria Digilio, Bruno Marino, Bruno Dallapiccola, Courtney Carpenter, Xin Zheng, Jacob Johnson, Jonathan Chung, Anne Marie Higgins, Nicole Philip, Tony Simon, Karlene Coleman, Damian Heine Suñer, Jordi Rosell, Wendy Kates, Marcella Devoto, Elaine Zackai, Tao Wang, Robert Shprintzen, Beverly Emanuel, Bernice Morrow, International Chromosome 22q11.2 Consortium

Robert J. Shprintzen

Velo-cardio-facial syndrome/DiGeorge syndrome, also known as 22q11.2 deletion syndrome (22q11DS) is the most common microdeletion syndrome, with an estimated incidence of 1/2,000 – 1/4,000 live births. Approximately 9–11% of patients with this disorder have an overt cleft palate (CP), but the genetic factors responsible for CP in the 22q11DS subset are unknown. The TBX1 gene, a member of the T-box transcription factor gene family, lies within the 22q11.2 region that is hemizygous in patients with 22q11DS. Inactivation of one allele of Tbx1 in the mouse does not result in CP, but inactivation of both alleles does. Based on these data, …