Abstract
Objective
Maternal plasma is a source of circulating placental nucleic acids. In this study, we validated previous observations on abnormal levels of circulating messenger RNA (mRNA) for the tenascin-X gene in pregnancies with ventricular septal defects in the second trimester of pregnancy.
Methods
This was a bicentric retrospective study conducted from March 2016 to July 2017. Real-time polymerase chain reaction was used to identify abnormally expressed genes, comparing ten women carrying a euploid fetus with ventricular septal defects to 30 controls at 19–24 weeks of gestation. The univariable analysis was used to determine whether the mean mRNA for the tenascin-X gene values would differ from the expected values for the controls.
Results
mRNA for tenascin-X gene values was higher in ventricular septal defects, 4.38 ± 3.01 versus 1.00 ± 0.80. The result was still significant even after adjustment for gestational age.
Conclusions
These data confirm previous studies on the specific association of mRNA species and type of congenital heart defect and confirm that ventricular septal defects are associated with abnormal mRNA for the tenascin-X gene. The positive predictive value of this molecular marker in the general population should be assessed through prospective studies.
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D. Morano, S. Berto, C. Lapucci, L. Walczer Baldinazzo D. Prandstraller, and A. Farina declare that they have no conflict of interest.
Funding
This study was funded by RFO University of Bologna, Italy (A. Farina) and by Synlab Brescia (S. Berto and C. Lapucci).
Ethical approval and informed consent
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.
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Morano, D., Berto, S., Lapucci, C. et al. Levels of Circulating mRNA for the Tenascin-X (TNXB) Gene in Maternal Plasma at the Second Trimester in Pregnancies with Isolated Congenital Ventricular Septal Defects. Mol Diagn Ther 22, 235–240 (2018). https://doi.org/10.1007/s40291-018-0321-4
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DOI: https://doi.org/10.1007/s40291-018-0321-4