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Comparing Copy Number Variations and SNPs02:26

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Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
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Related Experiment Video

Updated: Aug 1, 2025

Detection of Copy Number Alterations Using Single Cell Sequencing
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A zero-agnostic model for copy number evolution in cancer.

Henri Schmidt1, Palash Sashittal1, Benjamin J Raphael1

  • 1Department of Computer Science, Princeton University, NJ, USA.

Biorxiv : the Preprint Server for Biology
|April 24, 2023
PubMed
Summary

We introduce a new model for tumor evolution, the zero-agnostic copy number transformation (ZCNT) model, which simplifies genome analysis. Our algorithm, Lazac, efficiently infers tumor phylogenies, outperforming existing methods on simulated and real data.

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Last Updated: Aug 1, 2025

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Area of Science:

  • Computational Biology
  • Genomics
  • Cancer Research

Background:

  • Single-cell DNA sequencing provides tumor copy number profiles.
  • Inferring tumor evolutionary history relies on copy number phylogenies.
  • The copy number transformation (CNT) model is widely used but lacks efficient phylogeny algorithms.

Conclusions:

  • The ZCNT model offers a computationally tractable approach to tumor phylogeny.
  • Lazac provides a significant advancement in inferring cancer evolutionary histories.
  • This work facilitates more accurate reconstruction of tumor development from genomic data.