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Mutant ATRX: pathogenesis of ATRX syndrome and cancer

Kejia Yuan1, Yan Tang1, Zexian Ding1

  • 1Key Laboratory of Model Animals and Stem Cell Biology, Hunan Normal University School of Medicine, Changsha, Hunan, China.

Frontiers in Molecular Biosciences
|October 31, 2024
PubMed

Insights

Alpha-thalassemia X-linked intellectual disability syndrome (ATRX) mutations cause intellectual, skeletal, and other disabilities. These mutations also drive cancer development, highlighting ATRX

Area of Science:

  • Genetics and Molecular Biology
  • Cancer Biology
  • Developmental Biology

Background:

  • The transcriptional regulator ATRX is a crucial genetic factor implicated in various developmental processes.
  • Mutations in ATRX are linked to a spectrum of disabilities, including intellectual, hematopoietic, skeletal, facial, and urogenital abnormalities.
  • ATRX dysfunction is also a significant factor in the pathogenesis of ATRX syndrome and is frequently observed in gliomas and other cancers.

Purpose of the Study:

  • To elucidate the role of ATRX in the pathogenesis of various diseases, including developmental disorders and cancers.
  • To understand how ATRX mutations disrupt its normal function and contribute to disease.
  • To highlight ATRX as a central protein involved in multiple disease pathways.

Main Methods:

  • Analysis of ATRX gene mutations and their impact on protein function.
  • Investigation of ATRX's role in cellular processes like transcriptional regulation and subcellular localization.
  • Examination of ATRX interactions with key regulatory proteins (DAXX, EZH2, TERRA).

Main Results:

  • ATRX mutations disrupt its organization, localization, and transcriptional activity.
  • These disruptions lead to chromosomal instability.
  • Impaired interactions with proteins like DAXX, EZH2, and TERRA are observed.

Conclusions:

  • ATRX is a pivotal protein whose abnormalities are central to the pathogenesis of multiple diseases.
  • Understanding ATRX function and mutation effects is critical for addressing associated syndromes and cancers.
  • ATRX plays a significant role in neuronal disorders and other pathological conditions.
Keywords:
ALTATRXATRX syndromereplication stresstranscriptional regulationtumorigenesis

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