Treacher Collins Syndrome - Genetic Testing

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What genes are related to Treacher Collins syndrome?

Mutations in the TCOF1 gene cause Treacher Collins syndrome.

The TCOF1 gene provides instructions for making a protein called treacle. Although researchers have not determined the precise function of this protein, they believe that it plays a critical role before birth in the development of bones and other tissues in the face. Mutations in the TCOF1 gene reduce the amount of treacle that is produced in cells. Researchers believe that a loss of this protein signals cells that are important for the development of facial bones to self-destruct (undergo apoptosis). This abnormal cell death may lead to the specific problems with facial development found in Treacher Collins syndrome.

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