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Mass Spectrometry: Molecular Fragmentation Overview01:20

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A Direct Force Probe for Measuring Mechanical Integration Between the Nucleus and the Cytoskeleton
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Published on: July 29, 2018

Pressure induced nucleus DNA fragmentation.

Cezary Grygoruk1, Piotr Sieczynski, Jacek A Modlinski

  • 1Center for Reproductive Medicine Bocian, Akademicka 26, 15-267, Bialystok, Poland. cezary.grygoruk@gmail.com

Journal of Assisted Reproduction and Genetics
|January 15, 2011
PubMed
Summary

A brief pressure impulse significantly damages nuclear DNA in mouse blastocysts. This study reveals that pressure fluctuations cause DNA shearing, impacting cell integrity.

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Published on: September 14, 2011

Area of Science:

  • Reproductive Biology
  • Molecular Biology
  • Cell Biology

Background:

  • Nuclear DNA integrity is crucial for viable cells.
  • Understanding environmental impacts on DNA is vital for reproductive health.

Purpose of the Study:

  • To investigate the effects of pressure on nuclear DNA integrity in mouse blastocysts.
  • To determine if low-magnitude pressure can induce DNA damage.

Main Methods:

  • Mouse blastocysts (N=15) were exposed to a pressure impulse (~0.021 s, ~76 mmHg).
  • Nuclear DNA fragmentation was quantified using the TUNEL assay within 60 seconds post-exposure.

Main Results:

  • The experimental group showed a significantly higher DNA fragmentation index (83%) compared to the control group (19.7%).
  • A statistically significant difference was observed (p < 0.001).

Conclusions:

  • Low-magnitude pressure impulses can induce nuclear DNA fragmentation in mouse blastocysts.
  • Compression and decompression forces during pressure fluctuations are identified as the cause of DNA shearing.