Using more-specific `genetic scissors` may avoid problems associated with gene editing
(PHYSorg.com Biology)

Recent studies have suggested a potential barrier to making CRISPR gene-editing treatments a viable option for inherited blood-related disorders such as sickle cell anemia, thalassemia, and primary immunodeficiency syndromes. Stem cells may respond to having their genes edited by shutting down-and trying to get around this roadblock could increase the risk of cancer.