Prenatal testing for late infantile neuronal ceroid lipofuscinosis

Classic late infantile neuronal ceroid Lipofuscinosis (LINCL) is a neurodeg enerative disease in which autofluorescent "curvilinear" storage bodies acc umulate in tissues from affected patients. Recently, the LINCL gene (CLN2) has been found to code for a pepstatin-insensitive lysosomal protease whose activity is deficient in LINCL specimens, We report the first 2 cases of s uccessful prenatal testing for LINCL by using DNA and enzyme-based methods on amniocytes, and describe a new private mutation in one of the families a nalyzed. These approaches allow definitive prenatal diagnosis and represent a significant improvement over previous pathological methods.