Assessment of free fetal DNA concentration in maternal plasma during the first trimester of pregnancy: comparative study between EDTA and PPT tubes - pilot study.
| Autor: | Chadud CS; Department of Obstetrics and Gynecology, Medical College Sciences of Santa Casa of São Paulo (FCMSCSP) , São Paulo-SP , Brazil ., Araujo Júnior E, Martinhago CD, Andari VC, Tedesco GD, Bussamra LC, Aoki T |
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| Jazyk: | angličtina |
| Zdroj: | The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians [J Matern Fetal Neonatal Med] 2015 Jan; Vol. 28 (2), pp. 172-6. Date of Electronic Publication: 2014 May 14. |
| DOI: | 10.3109/14767058.2014.908843 |
| Abstrakt: | Objective: To compare ethylenediamine tetraacetic acid (EDTA) tubes and plasma preparation tubes (PPT) for evaluating maternal plasma during the first trimester of pregnancy. Methods: A cross-sectional study was conducted on 24 male fetuses in women between 6 and 14 weeks of pregnancy. Blood samples (10 mL) were collected and stored in EDTA and PPT tubes. Subsequently, the samples were centrifuged and sent for free fetal DNA extraction by means of the polymerase chain reaction (PCR) technique. The reactions were performed in a real time PCR machine for detecting the amplification products. The genome region chosen for performing the PCR reactions was a target specific for the Y chromosome, in which the DYS-14 marker was amplified only when the DNA was of male sex. The free fetal DNA concentration was given by the threshold cycle (TC). To compare the tubes, the paired Student t-test was used. Results: The mean gestational age was 11.08 ± 2.30 weeks (range: 6-14). The mean TC for PPT was 30.08 ± 1.05 (range: 27.08-32.61) and for EDTA, 30.23 ± 0.96 (range: 28.01-32.09), but without statistical significance (p=0.357). Conclusion: We did not observe any statistically significant difference in free fetal DNA concentration between the EDTA and PPT tubes. |
| Databáze: | MEDLINE |
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