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Related Experiment Videos

Tracking Multiple Genomic Elements Using Correlative CRISPR Imaging and Sequential DNA FISH.

Juan Guan1, Harrison Liu1, Xiaoyu Shi1

  • 1University of California, San Francisco, San Francisco, California.

Biophysical Journal
|March 30, 2017
PubMed
Summary
This summary is machine-generated.

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This study introduces a novel method combining CRISPR imaging and DNA FISH for highly multiplexed live genome recording. This technique allows for precise identification of multiple genomic loci without spectral limitations.

Area of Science:

  • Genomics
  • Molecular Biology
  • Cell Biology

Background:

  • Live imaging of the genome is crucial for understanding genome organization and gene expression dynamics.
  • Current multicolor CRISPR imaging methods face limitations due to the need for spectrally distinct fluorophores for multiplexing.

Purpose of the Study:

  • To develop a highly multiplexed live recording approach for genomic loci.
  • To overcome the spectral limitations of traditional multicolor imaging techniques.

Main Methods:

  • Correlative CRISPR imaging combined with sequential DNA fluorescence in situ hybridization (FISH).
  • Optimized DNA FISH protocol for rapid (1-minute per round) and reversible staining (up to 20 rounds).
  • Developed a correlation-based algorithm for accurate registration of live and FISH images.

Related Experiment Videos

Main Results:

  • Successfully identified seven genomic elements using the correlative approach.
  • Demonstrated simultaneous live imaging of genomic loci and a cell cycle reporter.
  • The image registration algorithm is transferable to other multiplex imaging systems.

Conclusions:

  • The developed correlative CRISPR imaging and sequential DNA FISH approach enables highly multiplexed live genome recording.
  • This method overcomes spectral limitations and allows for concurrent imaging of other cellular processes.
  • The image registration algorithm has broad applicability for other multiplex imaging modalities.