"The fledgling field of gene therapy has scored another win An experimental treatment seemed to help boys with the inherited nerve disease featured in the movie Lorenzos Oil.  Fifteen of the  boys treated in a study had no major disability two years laterremarkable for a disease that often causes swift decline and kills within a decade.  This appears to be a terrific new therapy for many kids who had little hope before said one study leader Dr. David A. Williams of Boston Childrens Hospital.  The news is bittersweet for Paul and Liliana Rojas a couple from Dover Plains New York with two sons who have the disease. Brian  received the treatment Brandon  didnt.  Brandon was too far along in his disease to qualify for the study his father said. Brian was not. Thanks to Brandon he was diagnosed early in time to be helped.  Study results were published Wednesday by the New England Journal of Medicine and discussed at a medical conference in Kansas City Missouri. Government grants and the therapys makerBluebird Bio Inc. of Cambridge Massachusettspaid for the study and some researchers work or consult for the company.  Only one gene therapy is sold in the United States a leukemia treatment approved in August. Only a few are sold elsewhere. Researchers increasingly are trying these approaches for diseases caused by a single gene as this one is. Called adrenoleukodystrophy ahdreenolewkohDIStrofee it almost exclusively strikes boys who have only one copy of the X chromosome where the gene that causes the disease lies. It affects about  in every  boys worldwide.  They are unable to make a protein that helps break down certain fatty acids causing the acids to build up and damage nerves muscles and the brain.  Their plight became better known after the  movie about a couple who desperate for a cure for their son developed a treatment from olive and rapeseed oils that seemed to help him. The real life Lorenzo died in  at age  having lived two decades longer than doctors predicted.  Lorenzos oil did not turn out to be a cure. The only effective treatment is a stem cell transplant from a matched sibling but only about  in  boys with the disease have such a donor.  The gene therapy tested a way for boys to serve as their own cell donors. Doctors remove some of the patients blood stem cells modify them in the lab to carry the healthy gene and give them back intravenously. Before the modified cells are returned patients take strong medicines to destroy much of their native bone marrow. That helps the genetically modified cells take hold and multiply so they can supply the protein that the boys lack.  The study tested this treatment in  boys ages  to  with the most severe form of the disease that affects the brain. Two years after treatment  were neurologically stable. The other two died one from worsening disease and the other from complications of a donor transplant attempted after he withdrew from the study.  The results suggest this therapy is at least as good as stem cell transplants given to boys who have suitable donors and it is possibly safer Dr. Marc Engelen of Emma Childrens Hospital in Amsterdam wrote in a commentary in the medical journal.  The main questions are how long the benefits will last how much the treatment will cost if it wins approval and whether it will replace stem cell transplants from donors he wrote. The U.S. Food and Drug Administration requires gene therapy participants to be monitored for  years so these patients will continue to be studied Williams said. Eight more patients are being added to the study as part of Bluebirds plans to seek approval of the therapy in the U.S. and Europe.  Brandon Rojas now needs a wheelchair and feeding tube. He had been a healthy normal child until suddenly starting to drool and have learning problems in school about the time he turned . He was diagnosed three years ago and doctors advised the couple to have Brian tested too. They were on a MakeAWish Foundation trip when the results came.  We were driving to one of the Disney parks and had to pull over to get the call Paul Rojas said. Once we got off the phone we both looked at each other and said we need to move forward now and save our younger son any way we can.  The couple has joined an effort to increase newborn screening for the disease especially now that a therapy may soon be available to helpif its tried soon enough."