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Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced...
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Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
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Genome-Wide CRISPR Screen for Unveiling Radiosensitive and Radioresistant Genes
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FACS-based genome-wide CRISPR screening platform identifies modulators of CD47.

Ling Yin1, Wei He2, Yifan Wang3

  • 1Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States.

Frontiers in Immunology
|January 28, 2026
PubMed
Summary
This summary is machine-generated.

Researchers identified DNAJC13 as a key regulator of CD47, an immune checkpoint protein. DNAJC13 deficiency increases tumor cell phagocytosis, enhancing innate immune response against cancer and improving CD47 blockade therapy efficacy.

Keywords:
CD47CRISPR/Cas9 screenDNAJC13FACSmacrophage

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Area of Science:

  • Immunology
  • Genetics
  • Cancer Biology

Background:

  • CD47 acts as an innate immune checkpoint, allowing tumor cells to evade macrophage clearance.
  • Understanding CD47 regulation is crucial for developing effective cancer immunotherapies.

Purpose of the Study:

  • To systematically identify genetic regulators of CD47 surface expression.
  • To explore the functional role of identified regulators in immune evasion and therapeutic response.

Main Methods:

  • Genome-wide CRISPR screens using Fluorescence-Activated Cell Sorting (FACS) across three murine cancer cell lines.
  • Comparative analysis using DrugZ software to identify genetic modifiers of CD47 expression.
  • Functional validation through gene knockout and co-culture assays with macrophages.

Main Results:

  • DNAJC13 consistently emerged as a robust regulator of CD47 surface expression across all tested cell lines.
  • DNAJC13-deficient tumor cells showed significantly reduced CD47 levels and increased susceptibility to phagocytosis by macrophages.
  • DNAJC13 knockout enhanced the efficacy of CD47 blockade therapy in reducing tumor burden.

Conclusions:

  • DNAJC13 is a previously unrecognized regulator of CD47, playing a role in tumor immune evasion.
  • High-throughput FACS-based CRISPR screening is effective for discovering modulators of immune checkpoint pathways.
  • Targeting DNAJC13 may represent a novel strategy to enhance cancer immunotherapy.