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Imprinting disorders.

Thomas Eggermann1, David Monk2, Guiomar Perez de Nanclares3

  • 1Institute for Human Genetics and Genomic Medicine, Medical Faculty, RWTH Aachen University, Aachen, Germany. teggermann@ukaachen.de.

Nature Reviews. Disease Primers
|June 29, 2023
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Summary
This summary is machine-generated.

Imprinting disorders (ImpDis) are rare congenital conditions affecting genomic imprinting, leading to challenges in diagnosis and treatment. Research is advancing understanding of their mechanisms and developing personalized therapies for conditions like Prader-Willi and Angelman syndromes.

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Area of Science:

  • Genetics
  • Developmental Biology
  • Pediatrics

Background:

  • Imprinting disorders (ImpDis) are congenital conditions resulting from disruptions in genomic imprinting.
  • Common examples include Prader-Willi syndrome, Angelman syndrome, and Beckwith-Wiedemann syndrome, often presenting with non-specific symptoms like growth disturbances and developmental delay.
  • Diagnosis is challenging due to the heterogeneity and overlap of clinical features.

Purpose of the Study:

  • To explore the mechanisms underlying imprinting disorders (ImpDis) and imprinting defects (ImpDefs).
  • To identify the impact of defects in differentially methylated regions (DMRs) on imprinted gene expression.
  • To provide insights into the pathophysiology and potential therapeutic strategies for ImpDis.

Main Methods:

  • Analysis of genomic and imprinting defects (ImpDefs) affecting differentially methylated regions (DMRs).
  • Investigation of monoallelic and parent-of-origin-specific gene expression.
  • Identification of functional cross-talk between imprinted genes and pathways.

Main Results:

  • Four types of genomic and imprinting defects (ImpDefs) affecting DMRs are identified as causes of ImpDis.
  • These defects disrupt the normal parent-specific expression of imprinted genes.
  • Functional cross-talk between imprinted genes and pathways offers insights into ImpDis pathophysiology.

Conclusions:

  • Understanding ImpDis requires a multidisciplinary approach, integrating genetic, developmental, and clinical perspectives.
  • Current treatments for ImpDis are symptomatic, with targeted and personalized therapies under development.
  • Further research into DMR regulation and gene interactions is crucial for improving diagnosis and treatment outcomes.