Gene and cell therapy for cystic fibrosis: From bench to bedside Current therapies for human are inadequate, and the need for effective therapies for most human molecular genetic provides a tool for unprecedented approach to the treatment of diseases through attack to the mutant genes. Results have indicated various target organs and gene transfer techniques resulting to a wide scientific and medical acceptance regarding the feasibility of gene therapy for disorder of various organs such as liver, lungs and some kind of cancer in addition to enzymes and hormones. There are well developed models that involve alteration of mutant target genes through gene transfer with recombinant pathogenic virus to express new genetic information hence, correcting disease phenotypes