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Cell Specific Gene Expression01:58

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Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
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Updated: Feb 2, 2026

Using an Automated Cell Counter to Simplify Gene Expression Studies: siRNA Knockdown of IL-4 Dependent Gene Expression in Namalwa Cells
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MER57E3 transposable elements regulate gene expression in a human cell model of neural development.

Michelle Almeida da Paz1,2, Umut Yildiz2, Minyoung Kim2,3

  • 1Institute of Biomedical Informatics, Graz University of Technology, Graz, Austria.

Genome Biology
|January 31, 2026
PubMed
Summary

Transposable elements (TEs) regulate neurogenesis genes. Specific MER57E3 elements control critical genes like PAX6 and NEUROG2, impacting neural progenitor cell development and potentially neurodevelopmental disorders.

Keywords:
Early neural developmentEpigenetic profileGene regulationNeural progenitor cell (NPC)Targeted CRISPR interference (CRISPRi)Transposable element

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Area of Science:

  • Genomics
  • Epigenetics
  • Neuroscience

Background:

  • Transposable elements (TEs), once viewed as genomic parasites, are now recognized as key drivers of genome evolution.
  • TEs contribute cell-type specific cis-regulatory elements that influence gene expression and phenotypes.
  • The regulatory roles and disease implications of TEs, particularly in transcriptional networks, are likely underestimated.

Purpose of the Study:

  • To systematically characterize the epigenetic profile of TEs in human neural development models.
  • To investigate the regulatory function of specific TE subfamilies, like MER57E3, in neurogenesis.
  • To explore the potential contribution of TE epigenetic dysregulation to neurodevelopmental disorders.

Main Methods:

  • Utilized a multimapper-aware strategy for systematic TE epigenetic profiling in human neural cell systems.
  • Analyzed histone modifications and transcription factor motif enrichment associated with TEs.
  • Employed CRISPR interference (CRISPRi) and RNA-sequencing (RNA-seq) to assess the impact of TE targeting on gene expression.

Main Results:

  • Identified MER57E3, a primate-specific TE subfamily, as enriched for active histone modifications in six human neural cell types.
  • Found MER57E3 copies located near zinc finger genes and enriched for brain-specific transcription factor binding motifs (e.g., homeodomain motifs).
  • Demonstrated that CRISPRi-mediated targeting of MER57E3 copies leads to downregulation of neurogenesis genes PAX6 and NEUROG2.

Conclusions:

  • MER57E3 transposable elements regulate key neurogenesis genes during neural progenitor cell development.
  • Highlights the significance of studying TEs and their epigenetic regulation in understanding neurodevelopment.
  • Suggests that epigenetic dysregulation of TEs may contribute to the pathogenesis of neurodevelopmental disorders.