Copy Number Variations with Isolated Fetal Ventriculomegaly

Title:Copy Number Variations with Isolated Fetal Ventriculomegaly

Volume: 17 Issue: 2

Author(s): P. Hu, Y. Wang, R. Sun, L. Cao, X. Chen, C. Liu, C. Luo, D. Ma, W. Wang, X. Fu, W. Shi, S. Yi, K. Zhang*, H. Liu*Z. Xu*

Affiliation:

• Institute for Genomic Medicine, University of California San Diego, La Jolla, California 92093,United States

• Department of Gynecology and Obstetrics, West China Second Hospital, Sichuan University, Chengdu, Sichuan,China

• State Key Laboratory of Reproductive Medicine, Department of Prenatal Diagnosis, Obstetrics and Gynecology Hospital Affiliated to Nanjing Medical University, Nanjing,China

Keywords: Fetal ventriculomegaly, copy number variant, autism, mental retardation, prenatal diagnosis.

Abstract: Background: Copy Number Variations (CNVs) are an important genetic cause of a number of neurodevelopmental disorders (NDs). However, the association between CNVs and the development and prognosis of fetal isolated mild ventriculomegaly (IMV) is unclear.

Objectives: To investigate possible associations between CNVs and the development of fetal IMV.

Methods: This retrospective study recruited 154 subjects with ultrasound-confirmed fetal IMV and 190 subjects in a control cohort who underwent a high-risk prenatal serum screening program. The exclusion criteria included fetus G-banding chromosomal abnormality or positive fetus TORCH infection. DNA samples from all 344 fetuses were examined by an SNP-array. Developmental outcomes were assessed during postnatal follow-up.

Results: Fourteen pathogenic CNVs (pCNVs) were identified in 13 out of 154 IMV fetuses. Three pCNVs were found in 3 out of 190 subjects in the prenatal screening high-risk cohort, with a significant difference (P value=0.016, X2 test). Notably, the 14 pCNVs detected in the IMV cohort were all associated with neurodevelopmental disorders (NDs), including autism, intellectual disability. Among the 13 IMV fetuses carrying pCNVs, five subjects were found in the postnatal follow-up to manifest NDs, including two with autism and three with mild neurodevelopmental delay. The other 8 subjects consisted of three normal infants younger than 12-months old, two lost in the follow-up, and three with the termination of pregnancy. Out of 141 IMV subjects without detectable pCNVs, 123 subjects showed normal development, 16 were lost in the follow-up, 2 subjects terminated the pregnancy due to fetal hydrocephalus or congenital heart disease in the late fetus development.

Conclusions: This study suggests an association between pCNVs and fetal IMV. pCNVs may be involved in the pathological process of fetal IMV and postnatal NDs. Identifying specific genomic alterations may provide an insight into pathogenetic mechanism and aid better diagnosis and prognosis of neurodevelopmental outcomes in fetal IMV.

Cite this article as:

Hu P. , Wang Y. , Sun R. , Cao L., Chen X., Liu C., Luo C., Ma D. , Wang W. , Fu X., Shi W., Yi S. , Zhang K. *, Liu H.*, Xu Z.*, Copy Number Variations with Isolated Fetal Ventriculomegaly, Current Molecular Medicine 2017; 17 (2) . https://dx.doi.org/10.2174/1566524017666170303125529

DOI https://dx.doi.org/10.2174/1566524017666170303125529	Print ISSN 1566-5240
Publisher Name Bentham Science Publisher	Online ISSN 1875-5666