Abstract
Objective
To perform the ultrastructural examination of a chorionic villi biopsy as a predictor of foetal involvement in the infantile form of glycogenosis type II (Pompe disease).
Methods
Ultrastructural, biochemical and genetic analyses were performed on chorionic villi biopsies of three consecutive pregnancies in a woman with a previous child affected by Pompe disease.
Results
In the only affected foetus, glycogen storage was observed in fibrocytes and endothelial cells of a chorionic villi sample at 11 week’s gestation. Severe multi-organ involvement was demonstrated in the tissues of the aborted foetus. No abnormal material was found in the chorionic samples of two subsequent pregnancies, and a healthy boy and girl were born at term and remain unaffected. Both exhibited a partial reduction in acid maltase and were carriers of the maternal mutation.
Conclusions
Ultrastructural findings correlated with biochemical and genetic results, providing a clear and early indicator of the definite diagnosis for future pregnancy management or an early therapeutic approach.
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Abbreviations
- GSDII:
-
glycogen storage disease type II
- ERT:
-
enzyme replacement therapy
- CK:
-
creatine kinase
- EMG:
-
electromyography
- PAS:
-
periodic acid–Schiff
- GAA :
-
acid α-glucosidase gene
- 4MUG:
-
4-methylumbelliferyl-α-D-glucoside
- CVS:
-
chorionic villi sample
- LSDs:
-
lysosomal storage disorders
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Acknowledgements
The authors are grateful to Christine O’Hara for her help with the English version of the paper, to Soraya Barrera for her excellent technical work, and to Tania Vazquez for editorial assistance. This work was supported by grants from Fondo de Investigacion Sanitaria (PI07/1257 and PI07/90043) and Xunta de Galicia (PGIDIT06PXIB905328PR and INCITE07PXI905221ES). Beatriz San Millan was supported by a research contract from the Instituto de Salud Carlos III (ISCIII), (Exp CM07/00135).
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Communicated by: Alberto B. Burlina
Competing interest: None declared.
Beatriz San Millan and Susana Teijeira contributed in equal measure to this study
References to electronic databases: OMIM catalogue number: Pompe disease, glycogen storage disease type II, OMIM 232300.
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San Millan, B., Teijeira, S., Domínguez, C. et al. Chorionic villi ultrastructure in the prenatal diagnosis of glycogenosis type II. J Inherit Metab Dis 33 (Suppl 3), 105–111 (2010). https://doi.org/10.1007/s10545-009-9033-6
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DOI: https://doi.org/10.1007/s10545-009-9033-6