DNA-based prenatal diagnosis of the infantile form of neuronal ceroid lipofuscinosis (INCL,CLN1) |
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| Authors: | Irma Järvelä MD Juhani Rapola Leena Peltonen Lea Puhakka Jouni Vesa Pirkko Ämmälä Riitta Salonen Markku Ryynänen Pertti Haring Aki Mustonen Pirkko Santavuori |
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| Institution: | 1. Department of Pathology, University of Helsinki, Finland;2. Laboratory of Molecular Genetics, National Public Health Institute, Helsinki, Finland;3. Department of Obstetrics and Gynecology, University of Helsinki, Finland;4. Laboratory of Prenatal Genetics, University of Helsinki, Finland;5. Departmenl of Clinical Genetics, Kuopio University Hospital, Finland;6. Department of Obstetrics and Gynecology, Kuopio University Hospital, Finland;7. Department of Child Neurology, University of Helsinki, Finland |
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| Abstract: | Eleven fetuses at risk for the infantile form of neuronal ceroid lipofuscinosis (INCL, CLN1) were studied using DNA markers and the results were compared with the results of electron microscopy (EM) of chorionic villus specimens from pregnancies in the first or early second trimester of pregnancy. In four cases, the prenatal diagnosis was made independently with both methods, and in seven cases, the EM diagnosis was confirmed postnatally or from autopsy material using RFLP analysis. The two methods gave concordant results in all cases. The DNA analysis based on RFLP haplotypes also for the first time facilitates reliable carrier diagnostics. RFLP analysis based on polymorphic markers closely linked to the INCL locus is now available for prenatal diagnosis of this fatal brain disease, whose biochemical background is totally unknown and for which no treatment is available. |
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| Keywords: | Prenatal diagnosis INCL DNA analysis Electron microscopy |
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