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Related Concept Videos

Somatic to iPS Cell Reprogramming01:29

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Reprogramming alters the gene expression in somatic cells, transforming them into induced pluripotent stem (iPS) cells over several generations. Scientists can reprogram cells by introducing genes for four transcription factors—Oct4, Sox2, Klf4, and c-Myc (OSKM) by viral or non-viral methods. These factors are also known as Yamanaka factors after Shinya Yamanaka, who first generated iPS cells using mouse skin cells. Yamanaka was awarded the Nobel Prize in Physiology or Medicine in 2012...
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Nuclear reprogramming is a process of transforming one cell type into an unrelated cell type by epigenetic changes that alter the cell’s original gene expression pattern. Such epigenetic changes force cells to express a different set of genes, which play a significant role in inducing transformation into other cell types. Nuclear reprogramming offers applications in reproductive cloning for livestock propagation and regenerative medicine — developing patient-specific cells for...
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Single-cell and spatial transcriptomics define 20E-driven developmental reprogramming in silkworm wing disc.

Qingsong Liu1, Mingmin He2, Hao Chen1

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This summary is machine-generated.

Scientists mapped silkworm wing development using single-cell analysis. They identified key cell types and transitions, revealing how hormones control organogenesis for potential agricultural applications.

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Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Insect Science

Background:

  • Insect wing development involves complex tissue patterning, cell fate changes, and hormonal signaling.
  • The precise spatiotemporal control governing these processes remains largely unelucidated.
  • Silkworms offer a robust model system due to large wing discs and distinct developmental stages.

Purpose of the Study:

  • To construct a high-resolution, spatiotemporal single-cell atlas of silkworm wing disc development.
  • To identify distinct cell types, their developmental trajectories, and key regulatory mechanisms.
  • To investigate the role of hormone signaling, specifically 20-hydroxyecdysone, in accelerating development.

Main Methods:

  • Generated a spatiotemporal single-cell atlas across 10 timepoints of silkworm wing disc development.
  • Employed time-resolved single-nucleus RNA sequencing (snRNA-seq) to analyze transcriptional dynamics.
  • Integrated morphological data, hormone level measurements, and gene expression profiles.

Main Results:

  • Identified 12 major cell types and characterized their developmental transitions, with Wing Morphogenesis (Wm) cells as central progenitors.
  • Revealed hierarchical transcriptional reprogramming and identified Wm cells as early signaling hubs.
  • Demonstrated that 20-hydroxyecdysone rapidly accelerates cell fate transitions and gene expression, mimicking natural development.

Conclusions:

  • Established a five-stage Gene Transition Model for silkworm wing development, detailing progressive fate resolution.
  • Provided insights into hormone-driven organogenesis and the spatiotemporal regulation of insect development.
  • Highlighted potential applications for manipulating insect development in agriculture.