Genes (Dec 2021)

Prenatal Diagnosis by Array Comparative Genomic Hybridization in Fetuses with Cardiac Abnormalities

  • Katarzyna Kowalczyk,
  • Magdalena Bartnik-Głaska,
  • Marta Smyk,
  • Izabela Plaskota,
  • Joanna Bernaciak,
  • Marta Kędzior,
  • Barbara Wiśniowiecka-Kowalnik,
  • Krystyna Jakubów-Durska,
  • Natalia Braun-Walicka,
  • Artur Barczyk,
  • Maciej Geremek,
  • Jennifer Castañeda,
  • Anna Kutkowska-Kaźmierczak,
  • Paweł Własienko,
  • Marzena Dębska,
  • Anna Kucińska-Chahwan,
  • Tomasz Roszkowski,
  • Szymon Kozłowski,
  • Boyana Mikulska,
  • Tadeusz Issat,
  • Ewa Obersztyn,
  • Beata Anna Nowakowska

DOI
https://doi.org/10.3390/genes12122021
Journal volume & issue
Vol. 12, no. 12
p. 2021

Abstract

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Congenital heart defects (CHDs) appear in 8–10 out of 1000 live born newborns and are one of the most common causes of deaths. In fetuses, the congenital heart defects are found even 3–5 times more often. Currently, microarray comparative genomic hybridization (array CGH) is recommended by worldwide scientific organizations as a first-line test in the prenatal diagnosis of fetuses with sonographic abnormalities, especially cardiac defects. We present the results of the application of array CGH in 484 cases with prenatally diagnosed congenital heart diseases by fetal ultrasound scanning (256 isolated CHD and 228 CHD coexisting with other malformations). We identified pathogenic aberrations and likely pathogenic genetic loci for CHD in 165 fetuses and 9 copy number variants (CNVs) of unknown clinical significance. Prenatal array-CGH is a useful method allowing the identification of all unbalanced aberrations (number and structure) with a much higher resolution than the currently applied traditional assessment techniques karyotype. Due to this ability, we identified the etiology of heart defects in 37% of cases.

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