Prenatal diagnosis of variant late infantile neuronal ceroid lipofuscinosis (vLINCLFinnish; CLN5)

Autor: Irma Järvelä, Jaana Lähdetie, Juhani Rapola, Maila Penttinen, Päivi Helminen, Juha Isosomppi
Rok vydání: 1999
Předmět:
Zdroj: Prenatal Diagnosis. 19:685-688
ISSN: 1097-0223
0197-3851
DOI: 10.1002/(sici)1097-0223(199907)19:7<685::aid-pd603>3.0.co;2-f
Popis: The first prenatal diagnosis of variant late infantile neuronal ceroid lipofuscinosis (vLINCLFinnish; CLN5) is reported. The disease belongs to the group of progressive encephalopathies in children with psycho-motor deterioration, visual failure and premature death. Neurons and several extraneural cells harbour lysosomal inclusions showing accumulation of material with histochemical characteristics of ceroid and lipofuscin. A Finnish woman with a daughter with vLINCL came for genetic counselling for her current pregnancy. Electron microscopy of a chorionic villus sample (CVS) at the 11th week of gestation did not reveal inclusions characteristic for NCL. DNA analysis showed that the fetus had inherited the major mutation, a 2 bp deletion of the CLN5 gene from the mother, and the same paternal (and maternal) haplotypes for COLAC1 and AC224 as the aVected daughter. The pregnancy was terminated. Electron microscopy of the CVS of the aborted fetus at the 14th week of pregnancy showed lysosomal electron dense inclusions with straight and curved lamellar profiles consistent with vLINCL. Prenatal diagnosis of NCL-disorders (CLN1, CLN2, CLN3) can be made from CVS by demonstrating the mutations of the aVected genes or by haplotype analysis using the closely linked markers in most cases. In various clinical settings the DNA diagnostics may not be possible. Demonstration of the characterisitic inclusions of the placenta and fetal tissues remains a helpful adjunct in such cases. Copyright ? 1999 John Wiley & Sons, Ltd.
Databáze: OpenAIRE
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