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Subtelomeric MLPA: is it really useful in prenatal diagnosis?
MedLine Citation:
PMID:  20936637     Owner:  NLM     Status:  In-Process    
OBJECTIVE: To evaluate the usefulness of subtelomeric multiplex ligation-dependent probe amplification (MLPA) in both the detection of subtelomeric rearrangements in fetuses with ultrasound abnormalities and normal karyotype, and the characterization of cytogenetically detectable rearrangements.
METHOD: We studied by subtelomeric MLPA 229 pregnancies with ultrasound findings and normal karyotype (Group 1) and five pregnancies with a cytogenetically visible but not microscopically characterizable rearrangement (Group 2). The detected imbalances were confirmed by fluorescence in situ hybridization (FISH) and parents were also studied.
RESULTS: In Group 1, two clinically relevant subtelomeric imbalances (14qter deletion and 20pter deletion) and one subtelomeric imbalance of uncertain significance (X/Ypter duplication) were diagnosed, showing a detection rate of cryptic subtelomeric imbalances in these pregnancies of 1.3%. However, only 14qter deletion seems to be clearly associated with the observed prenatal findings. In Group 2, MLPA contributed to the precise description of the chromosome abnormalities.
CONCLUSION: The low detection rate of subtelomeric imbalances and the poor genotype-phenotype correlations in pregnancies with ultrasound abnormalities and normal karyotype suggest that subtelomeric MLPA is not a crucial tool in the prenatal diagnosis of these cases. However, our work provides evidence that MLPA is very useful for the characterization of unbalanced karyotypes. Copyright © 2010 John Wiley & Sons, Ltd.
Irene Mademont-Soler; Carme Morales; Jordi Bruguera; Irene Madrigal; Núria Clusellas; Ester Margarit; Aurora Sánchez; Anna Soler
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Prenatal diagnosis     Volume:  30     ISSN:  1097-0223     ISO Abbreviation:  Prenat. Diagn.     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-11-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8106540     Medline TA:  Prenat Diagn     Country:  England    
Other Details:
Languages:  eng     Pagination:  1165-9     Citation Subset:  IM    
Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Barcelona, Spain.
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