Abstract
Through the years, several techniques capable of detecting DNA copy number changes have been developed. A number of those, such as karyotyping and fluorescence in situ hybridization (FISH), have proven to be valuable tools in both research and diagnostics. Recently, a new technique, called microarray-based comparative genomic hybridization (array CGH), has been introduced. Array CGH has proven to be a specific, sensitive, and fast technique, with considerable advantages compared to other methods used for the analysis of DNA copy number changes. Array CGH enables analysis of the whole genome in a single experiment. Until now, its applications have been mainly directed at detecting genomic abnormalities in cancer. However, array CGH is also suitable for the analysis of DNA copy number aberrations that cause human genetic disorders. This review gives an overview of array CGH and its applications in human genetics. Advantages, limitations, and future perspectives of array CGH are discussed.
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