Impact of the human genome project on medical practice

The Human Genome Project is a coordinated effort to define the human genetic blueprint. The goals include construction of a variety of maps of the human genome, including the identification and localization of all genes. The discovery of genes responsible for human diseases has had a significant impact on the practice of medicine. Methods for defining the human genome include cytogenetic, physical, and genetic mapping techniques. A variety of strategies have been used to identify human genes, especially those genes that are responsible for disease. Once a disease gene has been identified, this information can be used to develop new diagnostic and therapeutic procedures. A number of disease genes have already been identified, leading to improved diagnosis and novel approaches to therapy. A new type of mutation, trinucleotide repeat expansion, has been found to be responsible for at least seven diseases with an unusual inheritance pattern. Materials and technology generated by the Human Genome Project and related research have provided important tools for the diagnosis and treatment of patients afflicted with genetic diseases.