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De novo copy number variants and parental age: Is there an association?

Abstract：

PURPOSE:To investigate whether increased parental age is associated with an increased risk for de novo copy number variant (CNV) formation in offspring. METHODS:CNV calls from 2323 individuals referred to Signature Genomic Laboratories for clinical microarray-based comparative genomic hybridization were investigated; 17% of the samples were prenatal and 83% were postnatal. The de novo CNV data were further split into de novo CNVs bound by low copy repeats (LCRs) and those not bound by LCRs. RESULTS:No association was found between CNV occurrence and paternal age in both the prenatal (p = 0.6795) and postnatal (p = 0.1741) cohorts. Maternal age was significantly higher with de novo CNV occurrence in our postnatal cohort (p = 0.0126), an effect which may be driven by formation of de novo CNVs that are bound by LCRs (p = 0.0026). Furthermore, a significant positive correlation was observed between maternal age and de novo CNVs (Point-Biserial R2 = 0.0503, p = 0.0152). CONCLUSIONS:This large-scale study did not find any evidence for the influence of increased paternal age on de novo CNV formation, while increased maternal age appeared to increase risk for de novo, non-complex CNV occurrence in offspring with intellectual disability/developmental delay. Further studies and continued technological advances will help yield more information on the risk factors for de novo CNVs.

journal_name

Eur J Med Genet

journal_title

European journal of medical genetics

authors

Wadhawan I,Hai Y,Foyouzi Yousefi N,Guo X,Graham JM Jr,Rosenfeld JA

doi

10.1016/j.ejmg.2019.103829

subject

Has Abstract

pub_date

2020-04-01 00:00:00

pages

103829

issue

4

eissn

1769-7212

issn

1878-0849

pii

S1769-7212(18)30701-8

journal_volume

63

pub_type

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