22q11缺失综合征的研究进展

22q11缺失综合征(22q11DS)是最常见的染色体微缺失疾病.它的临床表现复杂多样,可表现为心脏、颅面、四肢、免疫和内分泌等多系统的异常.其患病率约为1/2500～1/4000.22q11缺失的发病机制是缺失区域内的低拷贝重复序列之间的不对称重组,TBX1基因等被认为是其相关致病基因.

Progress on chromosome 22q11 deletion syndrome

Chromosome 22qll deletion syndrome(22q11DS) is a common chromosomal microdeletion syndrome. Its clinical manifestation is complex, comprising congenital heart disease, dysmorphic facial, immunodeficiency, endocrine dysfunction and so on. The syndrome has a population prevalence of approximately 1/2500-1/4000. There have been many recent advances in understanding of the clinical manifestation, behavior and psychiatric problems and the mechanisms leading to the specific phenotypic features in chromosome 22q11 deletion syndrome. Asymmetric recombination of homologous low copy repetitives in the deletion region causes the deletion of 22q11. TBX1 is the dominant gene contributing to the phenotype.