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Related Experiment Video

Updated: Jan 3, 2026

Determining Genetic Expression Profiles in C. elegans Using Microarray and Real-time PCR
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Exploratory analysis of transposable elements expression in the C. elegans early embryo.

Federico Ansaloni1, Margherita Scarpato2, Elia Di Schiavi3

  • 1Area of Neuroscience, International School for Advanced Studies (SISSA), Trieste, Italy.

BMC Bioinformatics
|November 24, 2019
PubMed
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Transposable elements (TE) expression varies across Caenorhabditis elegans early embryo cell types. Different TE classes, like Long Terminal Repeats, show distinct expression patterns, suggesting diverse developmental roles.

Area of Science:

  • Genomics
  • Developmental Biology
  • Molecular Biology

Background:

  • Transposable Elements (TE) are mobile genomic sequences comprising large portions of eukaryote genomes.
  • TE play roles in physiological and pathological processes, influencing gene transcription and contributing to diseases like cancer and neurodevelopmental disorders.

Purpose of the Study:

  • To investigate the expression patterns of Transposable Elements (TE) in different cell types of the Caenorhabditis elegans (C. elegans) early embryo.
  • To determine if TE expression correlates with genes involved in early embryonic development.

Main Methods:

  • Utilized a public C. elegans embryonic single-cell RNA-seq (sc-RNAseq) dataset.
  • Developed a bioinformatics pipeline to accurately quantify TE expression, excluding reads from TE fragments within annotated transcripts.
Keywords:
BioinformaticsCaenorhabditis elegansEarly embryoEmbryogenesisRNA-SeqSingle-cellTransposable elements

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Main Results:

  • Standard TE expression analysis tools may overestimate expression levels.
  • Long Terminal Repeats (LTR) elements are primarily expressed in undifferentiated cells, potentially involved in pluripotency and immune response.
  • Non-LTR elements are expressed in differentiated cells, particularly neurons, while DNA TE show homogeneous expression throughout early development.

Conclusions:

  • TE expression is finely modulated during C. elegans early embryogenesis.
  • Different TE classes exhibit distinct cell-type-specific and stage-specific expression patterns.
  • These findings suggest diverse functional roles for TE in early embryonic development.