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Related Concept Videos

DNA Damage can Stall the Cell Cycle02:36

DNA Damage can Stall the Cell Cycle

In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
DNA Damage Can Stall the Cell Cycle02:36

DNA Damage Can Stall the Cell Cycle

In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
Nucleotide Excision Repair01:38

Nucleotide Excision Repair

DNA Distortion and Damage
Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
Nucleotide Excision Repair01:08

Nucleotide Excision Repair

Overview
Nucleotide Excision Repair01:08

Nucleotide Excision Repair

Overview
Epigenetic Regulation01:37

Epigenetic Regulation

Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...

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  3. Rna-triggered Chromatin Shredding Hits Cancer's Hardest Targets
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  3. Rna-triggered Chromatin Shredding Hits Cancer's Hardest Targets

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Genome-Wide CRISPR Screen for Unveiling Radiosensitive and Radioresistant Genes
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RNA-Triggered Chromatin Shredding Hits Cancer's Hardest Targets

    Cancer Discovery
    |June 23, 2026

    View abstract on PubMed

    Summary
    This summary is machine-generated.

    New CRISPR technology uses RNA to shred chromatin, targeting cancer cells with hard-to-drug mutations like TP53 and MYC. This RNA-triggered chromatin shredding offers a novel therapeutic strategy for resistant cancers in mouse models.

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    Capturing Common Fragile Site Breaks by Native γH2A.X ChIP
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    Area of Science:

    • Molecular Biology
    • Genetics
    • Oncology

    Background:

    • Cancer cells often harbor mutations in genes like TP53 and MYC.
    • These mutations can confer resistance to conventional cancer therapies.
    • Targeting these hard-to-drug genes remains a significant challenge in cancer treatment.

    Purpose of the Study:

    • To investigate a novel RNA-triggered chromatin shredding mechanism for cancer therapy.
    • To evaluate the efficacy of the CRISPR enzyme Cas12a2 in selectively eliminating tumor cells.
    • To explore new therapeutic avenues for cancers resistant to existing drugs.

    Main Methods:

    • Utilized mouse models of cancer.
    • Employed the CRISPR enzyme Cas12a2 activated by a specific target transcript.
  • Assessed the selective elimination of tumor cells with specific genetic mutations.

    • Main Results:

    • Demonstrated RNA-triggered chromatin shredding by Cas12a2.
    • Showcased selective elimination of tumor cells with TP53 and MYC mutations.
    • Validated the approach in preclinical mouse models.

    Conclusions:

    • RNA-triggered chromatin shredding is a viable strategy against resistant cancers.
    • Cas12a2 offers a targeted approach to eliminate tumor cells with difficult mutations.
    • This method presents a promising new direction for cancer drug development.