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Related Experiment Video

Updated: Jan 24, 2026

Grafting of Beads into Developing Chicken Embryo Limbs to Identify Signal Transduction Pathways Affecting Gene Expression
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A single-cell transcriptomic atlas of the developing chicken limb.

Christian Feregrino1, Fabio Sacher1, Oren Parnas2,3

  • 1DUW Zoology, University of Basel, Vesalgasse 1, CH-4051, Basel, Switzerland.

BMC Genomics
|May 24, 2019
PubMed
Summary

This study maps cell types and gene activity during chicken limb development using single-cell RNA sequencing. It reveals new cell populations and gene networks crucial for limb patterning and digit formation.

Keywords:
Autopod patterningCellular transcriptomicsDigitsGene expressionInterdigitPerichondriumPhalangesscRNA-seq

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Area of Science:

  • Developmental Biology
  • Genomics
  • Evolutionary Biology

Background:

  • Organogenesis relies on precise, spatiotemporal cell type specification.
  • The developing chicken limb is a model for vertebrate pattern formation.
  • Previous research lacked genome-wide molecular data at cellular resolution for limb development.

Purpose of the Study:

  • To catalogue the developmental emergence of distinct tissue types in the chicken autopod at cellular resolution.
  • To analyze transcriptome dynamics during limb development.
  • To understand the interplay between cell specification and pattern formation.

Main Methods:

  • Droplet-based single-cell RNA sequencing (scRNA-seq).
  • Analysis of 17,628 cells from three key developmental stages of chicken autopod patterning.
  • Inference of gene co-expression modules.

Main Results:

  • Identification of 23 distinct cell populations, including rare cell types like the apical ectodermal ridge.
  • Discovery of molecularly distinct subpopulations within developing limb compartments with signaling functions.
  • Tracking of patterning-relevant cell populations using inferred gene co-expression modules.

Conclusions:

  • Provides a functional genomics resource for studying chicken limb patterning at cellular resolution.
  • The single-cell transcriptomic atlas captures major autopod cell populations and reveals transcriptional complexity.
  • Enables assessment of molecular similarities across tetrapod limb development and identifies candidate genes for morphological diversification.