Adenosine deaminase (ADA deficiency) could be permanently cure, if the gene isolated from marrow cells producing ADA is introduced into cell at
(1) early embryonic stages
(2) Late embryonic stages
(3) early childhood
(4) None of the above
(1) ADA deficiency is disorder caused due to the deletion of gene for adenosine deaminase. In some children ADA deficiency can be cured by bone marrow transplantation and in other it can be treated by enzyme replacement therapy. However, if the gene isolated from marow cells producing ADA introduced into cells at early embryonic stages, it could be a permanent cure.