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Comparison of quantitative fluorescent polymerase chain reaction and karyotype analysis for prenatal screening of chromosomal aneuploidies in 270 amniotic fluid samples

Nooshin Masoudzadeh and Shahram Teimourian ORCID logo

Abstract

Background

Quantitative fluorescent polymerase chain reaction (QF-PCR) technique is a rapid prenatal aneuploidy detection method. This method can diagnose abnormality in chromosome 13, 18, 21, X and Y. Karyotyping is a technique in which, by the process of pairing and painting, all the chromosomes of an organism are displayed under a microscope. In the present study, a statistical comparison was made between karyotyping and QF-PCR for prenatal diagnosis.

Methods

A total of 270 samples were tested for QF-PCR and the results were compared with karyotyping. We also investigated heterozygosity of short tandem repeat (STR) markers by QF-PCR. Deoxyribonucleic acid (DNA) samples (n = 270) were extracted from amniotic fluid (AF) cells. After PCR amplifications, analysis was performed using GeneMarker. A Devyser QF-PCR kit containing 26 primers was used to estimate the observed heterozygosity of STR markers located on chromosome 13, 18, 21, X and Y.

Results

The results of karyotyping and QF-PCR were as follows: trisomy 13 (one case), trisomy 18 (five cases), trisomy 21 (five cases) and triploidy (one case). Chromosomal rearrangements and mosaicisms were not detected by QF-PCR but were detected by karyotyping. Maternal cell contamination (MCC) made the karyotyping fail but not the QF-PCR.

Conclusion

The QF-PCR method is especially important because it is fast, accurate, low cost and has a short turnaround time. This method will avoid ambiguity of karyotype results and parental anxiety. It will also shorten clinical management for high-risk families.


Corresponding author: Shahram Teimourian, PhD, PD, Department of Medical Genetics, Iran University of Medical Sciences, Crossroads of Shahid Hemmat and Shahid Chamran Highways, P.O. Box: 15875-6171, Tehran 1449614535, Iran

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Employment or leadership: None declared.

  4. Honorarium: None declared.

  5. Competing interests: The funding organization(s) played no role in the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the report for publication.

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Received: 2019-03-02
Accepted: 2019-05-09
Published Online: 2019-06-11
Published in Print: 2019-08-27

©2019 Walter de Gruyter GmbH, Berlin/Boston