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Related Concept Videos

Comparing Copy Number Variations and SNPs02:26

Comparing Copy Number Variations and SNPs

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Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
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Motor difficulties in 16p11.2 copy number variation.

Amandeep Jutla1,2, Loraine Harvey3, Jeremy Veenstra-VanderWeele1,2

  • 1Department of Psychiatry, Columbia University, New York, New York, USA.

Autism Research : Official Journal of the International Society for Autism Research
|April 25, 2024
PubMed
Summary

Rare genetic variants 16p11.2 deletion and 16p11.2 duplication impact motor skills differently. Deletion is linked to greater gross motor impairment, while duplication is associated with less fine motor impairment.

Keywords:
16p11.2 deletion syndromeDNA copy number variationsautism Spectrum disorderhuman geneticsmotor skillsmovementphenotype

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Area of Science:

  • Genetics
  • Neurodevelopmental Disorders
  • Human Phenomics

Background:

  • 16p11.2 copy number variations (CNVs) are rare genetic variants associated with autism, intellectual disability, psychiatric disorders, and motor difficulties.
  • While 16p11.2 duplication and deletion share some clinical features, subtle phenotypic distinctions are emerging.
  • Previous research has not comprehensively compared motor deficits between 16p11.2 deletion and duplication carriers.

Purpose of the Study:

  • To conduct a comprehensive comparison of motor difficulties between individuals with 16p11.2 deletion and 16p11.2 duplication.
  • To identify specific patterns of motor impairment that converge or diverge between these two genetic variants.
  • To hypothesize that motor impairment is generally greater in deletion carriers than in duplication carriers.

Main Methods:

  • A comparative study involving 133 carriers of 16p11.2 deletion, 122 carriers of 16p11.2 duplication, and 388 familial controls.
  • Utilized regression models to analyze motor function data.
  • Assessed both gross and fine motor function indices.

Main Results:

  • 16p11.2 deletion status predicted greater impairment in gross motor function.
  • 16p11.2 deletion status predicted less impairment in fine motor function.
  • These findings suggest distinct motor profiles associated with 16p11.2 deletion versus duplication.

Conclusions:

  • Motor difficulties present differently in 16p11.2 deletion and duplication carriers, with deletion linked to more gross motor issues and duplication to less fine motor issues.
  • Understanding these motor differences can enhance insights into the complex effects of 16p11.2 CNV and other rare genetic causes of autism.
  • Further research is warranted to investigate these performance patterns in future studies.