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OROFACIAL CLEFT 5; OFC5

OROFACIAL CLEFT 5; OFC5

Alternative titles; symbolsCLEFT LIP WITH OR WITHOUT CLEFT PALATE, NONSYNDROMIC, 5▼ Molecular GeneticsWith both case-control- and nuclear family-based approaches...

Alternative titles; symbols

  • CLEFT LIP WITH OR WITHOUT CLEFT PALATE, NONSYNDROMIC, 5

▼ Molecular Genetics
With both case-control- and nuclear family-based approaches, Lidral et al. (1998) screened candidate genes for clefting in both the CL/P CPO of the nonsyndromic type. Significant linkage disequilibrium was found between CL/P and both MSX1 and TGFB3 (190230) and between CPO and MSX1, suggesting that these genes are involved in the pathogenesis of clefting. In addition, a mutation search in the genes DLX2 (126255), MSX1, and TGFB3 was performed in 69 CPO patients and in a subset of CL/P patients. No common mutations were found in the coding regions of these genes; however, several rare variants of MSX1 and TGFB3 were found that may alter their function.

Van den Boogaard et al. (2000) identified a stop codon in the MSX1 gene (142983.0002) in a 3-generation Dutch family with tooth agenesis and combinations of cleft palate only and cleft lip and cleft palate, providing further evidence for this gene in orofacial clefting. Scapoli et al. (2002) were unable to confirm the involvement of the MSX1 gene in nonsyndromic CL/P.

In 3 of 242 Filipinos with cleft lip/palate, Jezewski et al. (2003) identified a mutation in the MSX1 gene (142983.0004). One patient had unilateral cleft lip/palate; a second had bilateral cleft lip/palate; and the third had isolated cleft lip.

In 1 of 110 Uruguayan patients with cleft lip/palate, Jezewski et al. (2003) identified a mutation in the MSX1 gene (142983.0005). There was no family history of cleft lip/palate.

Suzuki et al. (2004) and Vieira et al. (2005) identified a missense mutation in the MSX1 gene (P147Q; 142983.0007) in Vietnamese and Filipino CL/P patients, respectively; however, Tongkobpetch et al. (2006) identified the variant in both Thai patients with nonsyndromic CL/P as well as normal Thai controls. Tongkobpetch et al. (2006) suggested that the P147Q variant is not pathogenic.

Tags: 4p16.2