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

Molecular Diagnosis & Therapy
Danila MoranoAntonio Farina

Abstract

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. 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. 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. 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 s...Continue Reading

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Citations

Aug 28, 2020·Frontiers in Cardiovascular Medicine·Liangping ChengZhan-Peng Huang

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