Gene therapy is an experimental technique that uses genes to treat or prevent disease. In the future, this technique may allow doctors to treat a disorder by inserting a gene into a patient's cells instead of using drugs or surgeryGene therapy is designed to introduce genetic material into cells to compensate for abnormal genes or to make a beneficial protein. ... Alternately, a sample of the patient's cells can be removed and exposed to the vector in a laboratory setting. The cells containing the vector are then returned to the patientThe goal of gene therapy is to cure or slowdown a genetic disease by repairing the damaged gene responsible for the disease. To achieve this goal, gene therapy requires the technology to insert the missing ? normal? gene into the DNA of the patient?Gene therapy is currently available primarily in a research setting. The U.S. Food and Drug Administration (FDA) has approved only a limited number of gene therapy products for sale in the United States