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Karyotyping01:17

Karyotyping

Describing the number and physical features of chromosomes can reveal abnormalities that underlie genetic diseases. This description is facilitated by special staining techniques that produce a particular banding pattern on each chromosome. State-of-the-art techniques make this approach even more powerful, enabling the detection of individual genes that cause disease.A Simple Chromosome Staining Technique Provides Valuable Scientific InsightSome genetic diseases can be detected by looking at...
Karyotyping01:17

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Updated: Jun 16, 2026

Array Comparative Genomic Hybridization (Array CGH) for Detection of Genomic Copy Number Variants
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Published on: February 21, 2015

Rare 19q13.42 duplication encompassing PRKCG associated with neurodevelopmental abnormalities.

Jiasun Su1, Lin Yang2, Huiping Li3

  • 1Division of Neonatology and Center for Newborn Care, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China.

Translational Pediatrics
|June 15, 2026
PubMed
Summary

Rare 19q13.42 duplications are linked to neurodevelopmental disorders (NDDs). This study identifies PRKCG as a candidate gene for NDDs associated with these duplications, suggesting a genotype-phenotype framework.

Keywords:
19q13.42PRKCGduplicationneurodevelopmental delaypediatrics

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Area of Science:

  • Genetics
  • Neurodevelopmental Disorders
  • Genomic Medicine

Background:

  • 19q13.42 duplications are rare genetic variations.
  • Their association with neurodevelopmental phenotypes is not well-understood.
  • Limited cases with detailed clinical data hinder characterization.

Purpose of the Study:

  • To investigate the clinical and genomic features of 19q13.42 duplications.
  • To identify candidate genes associated with neurodevelopmental disorders in this region.
  • To establish a preliminary genotype-phenotype framework for 19q13.42 duplications.

Main Methods:

  • Reviewed 20 pediatric cases with 19q13.42 duplications (10 internal, 10 public).
  • Utilized next-generation sequencing (NGS) and quantitative real-time polymerase chain reaction (qPCR).
  • Performed genotype-phenotype correlation and smallest region of overlap (SRO) mapping.

Main Results:

  • Neurodevelopmental disorders (NDDs) were observed in 94.1% of patients.
  • All NDD cases involved duplications of the PRKCG gene.
  • Duplication sizes ranged from 76.864 to 724.194 Kb with nonrecurrent breakpoints.

Conclusions:

  • Recurrent neurodevelopmental features are associated with 19q13.42 duplications.
  • PRKCG is proposed as a candidate gene for associated NDDs.
  • Further functional studies and comprehensive phenotyping are needed to validate findings.