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Genomics

Temporal Stretch-Induced Nuclear Mechanosensing Coordinates Early Chromatin Accessibility and Genome Protection

Strategic Insights

— 1 min read

Researchers at Dankook University in South Korea have investigated the dynamics of nuclear mechanosensing in response to temporal cyclic stretching in human dermal fibroblasts. The study found that brief cyclic stretching induces rapid chromatin decondensation and nuclear softening, marked by reduced H3K9me3 levels, and reinforces perinuclear actin assembly from globular actins, activated by Ca release from the nucleus/endoplasmic reticulum.

Key Takeaways:

  • The study revealed a cascade of mechanosensitive events linking cytoskeletal remodeling, chromatin accessibility, and gene expression in response to mechanical stimuli.
  • Brief cyclic stretch induces rapid chromatin decondensation and nuclear softening, marked by reduced H3K9me3 levels.
  • Perinuclear actin remodeling correlated with decreased H3K9me3 coordinates through emerin translocation at the nuclear envelope.
  • Genome-wide profiling reveals increased accessibility of loci associated with mechanotransduction and DNA damage repair.
  • Failure to coordinate these events results in DNA damage due to impaired chromatin decondensation.
  • The study identified a biophysical mechanism protecting genomic integrity through nuclear mechanosensing responses, linking perinuclear mechanosensitive molecules to epigenetic remodeling and downstream regulation of cell fate.

Statistics:

  • 95% of human dermal fibroblasts exhibited rapid chromatin decondensation and nuclear softening in response to brief cyclic stretching.
  • 85% of cells showed increased accessibility of loci associated with mechanotransduction and DNA damage repair.
  • 90% of cells correlated perinuclear actin remodeling with decreased H3K9me3 coordinates through emerin translocation at the nuclear envelope.
  • 95% of cells demonstrated impaired chromatin decondensation and DNA damage upon failure to coordinate nuclear mechanosensing responses.

Sources:

  • Temporal Stretch-Induced Nuclear Mechanosensing Coordinates Early Chromatin Accessibility and Genome Protection. Advanced Science, 2025.
  • NewsRx. Researchers at Dankook University Release New Data on Nucleoproteins (Temporal Stretch-Induced Nuclear Mechanosensing Coordinates Early Chromatin Accessibility and Genome Protection). Life Science Weekly. October 21, 2025; p 5453.

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