SciELO - Scientific Electronic Library Online

 
vol.41 issue2Inequalities in dental prenatal control in Colombia: An analysis based on the IV National Oral Health Study, 2013-2014In-hospital complications in an acute care geriatric unit author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google

Share


Biomédica

Print version ISSN 0120-4157On-line version ISSN 2590-7379

Abstract

ABARCA, Hugo et al. Importance of determining variations in the number of copies in newborns with autosomal aneuploidies. Biomed. [online]. 2021, vol.41, n.2, pp.282-292.  Epub June 15, 2021. ISSN 0120-4157.  https://doi.org/10.7705/biomedica.5354.

Introduction:

Aneuploidies are frequent genetic disorders in clinical practice. However, little is known about other genetic variants that may influence the final phenotype.

Objective:

To determine the variations in the number of copies and regions with homozygosity greater than 0.5% or larger than 10 Mb in newborns with autosomal aneuploidies.

Materials and methods:

We performed a chromosomal microarray analysis on newborns with autosomal aneuploidies (n=7), trisomy 21 (n=5), and trisomy 18 (n=2) evaluated at the Hospital Antonio Lorena and Hospital Regional of Cusco, Perú, during 2018.

Results:

We found pathogenic and probably pathogenic variants in the number of copies in other genomic regions different to chromosomes 21 or 18 in two neonates. Additionally, we found two variants bigger than 500 kpb of unknown pathogenicity.

Conclusions:

Although the number of analyzed individuals was small, it is important to highlight that we found other variants in the number of copies that have been described in association with neurodevelopmental disorders, congenital anomalies, deafness, and short/ tall stature, among others, in almost half of them, which will probably impact the phenotype negatively in patients with aneuploidies.

Keywords : Aneuploidy; DNA copy number variations; infant, newborn; neurodevelopmental disorders; deafness.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )