Which is an Example of Gene Therapy

Question

Which is an example of gene therapy?
A) replacing a failing heart with a new heart from a genetically matched donor
B) injecting human factor VIII protein into hemophiliacs with a defective factor VIII gene
C) infecting a cystic fibrosis patient with a virus carrying a working copy of the cystic fibrosis gene
D) providing therapeutic drugs to a patient experiencing high blood pressure

Accepted Answer

Gene therapy involves introducing new or functional genes into a patient's cells to replace or supplement nonfunctional or missing genes. In this case, infecting a cystic fibrosis patient with a virus carrying a working copy of the cystic fibrosis gene is an example of gene therapy.