Document Detail

Quantification of fetal nucleated cells in maternal blood of pregnant women with a male trisomy 21 fetus using molecular cytogenetic techniques.
MedLine Citation:
PMID:  16374897     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Prenatal diagnosis of trisomy 21 is based on fetal karyotyping generally obtained using invasive methods. During pregnancy, the circulating fetal cells in maternal blood constitute a potential source for development of a noninvasive prenatal diagnosis. The objective of this study was the identification and quantification of all fetal nucleated cells per unit volume of peripheral blood of pregnant women carrying male fetuses with trisomy 21 using molecular cytogenetic techniques. METHODS: Peripheral blood samples were obtained from 16 women carrying male fetuses with trisomy 21. We used a simple and rapid method of harvesting blood without recourse to any enrichment procedures or cell-separation techniques. To evaluate the potential of this method, 16 specimens were analyzed by molecular cytogenetic techniques such as fluorescence in situ hybridization (FISH) and primed in situ labeling (PRINS) using specific probes to chromosomes X, Y and 21. RESULTS: The number of fetal cells varied between 6 and 32 per mL of maternal blood. This number is 3-5 times higher than that from normal pregnancies. CONCLUSIONS: Our current results are in agreement with the results previously reported by other groups showing that the number of fetal cells in maternal blood in trisomic 21 pregnancies is higher than in normal pregnancies. This high number of fetal cells is regarded as an advantage for the development of a noninvasive prenatal diagnostic test.
Kada Krabchi; Macoura Gadji; Oumar Samassekou; Marie-Chantal Grégoire; Jean-Claude Forest; Régen Drouin
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Publication Detail:
Type:  Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Prenatal diagnosis     Volume:  26     ISSN:  0197-3851     ISO Abbreviation:  Prenat. Diagn.     Publication Date:  2006 Jan 
Date Detail:
Created Date:  2005-12-29     Completed Date:  2006-04-25     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8106540     Medline TA:  Prenat Diagn     Country:  England    
Other Details:
Languages:  eng     Pagination:  28-34     Citation Subset:  IM    
Copyright Information:
2006 John Wiley & Sons, Ltd.
Service of Genetics, Department of Pediatrics, Faculty of Medicine and Health Sciences, University of Sherbrooke, Sherbrooke, Quebec, Canada.
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MeSH Terms
Chromosomes, Human, Pair 21 / chemistry
Chromosomes, Human, X / chemistry
Chromosomes, Human, Y / chemistry
Cytogenetic Analysis*
Down Syndrome / blood,  diagnosis*
Erythroblasts / chemistry*
Fetal Blood / cytology*
In Situ Hybridization, Fluorescence
Predictive Value of Tests
Prenatal Diagnosis*
Primed In Situ Labeling
Sensitivity and Specificity

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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