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Updated: Jan 29, 2026
07:13
Detection of Post-translational Modifications on Native Intact Nucleosomes by ELISA
Published on: April 26, 2011
17.8K
Nucleosome Clustering as a Biomarker and Mechanistic Switch for Reprogramming Cells
Zhaoyuan Xu1, Yinzhi Xu1, Baiyan Li2
1Weldon School of Biomedical Engineering, Purdue University Indianapolis, Indianapolis, IN 46202, USA.
Cells
|January 28, 2026
Summary
Biophysical stimuli reprogram osteosarcoma cells into tumor-suppressing cells by decondensing chromatin. This chromatin remodeling, involving nucleosome scattering, is key to reprogramming the tumor microenvironment.
Area of Science:
- Cell Biology
- Epigenetics
- Cancer Research
Background:
- Chromatin architecture is dynamic and crucial for cellular function.
- Osteosarcoma progression is influenced by the tumor microenvironment.
- Cellular plasticity and reprogramming are potential therapeutic strategies.
Purpose of the Study:
- To investigate the nanoscale chromatin organization and cellular plasticity in osteosarcoma cells.
- To explore the effects of biophysical stimuli on chromatin structure and cell reprogramming.
- To identify epigenetic modifications associated with induced tumor-suppressing (iTS) cells.
Main Methods:
- High-resolution stochastic optical reconstruction microscopy (STORM) for nanoscale visualization.
- Application of mechanical vibration, electrical stimulation, and optical pulses.
- Pharmacological inhibition of histone deacetylases (Trichostatin A) and methyltransferases (chaetocin).
Main Results:
- Biophysical stimuli enlarged nuclear size and disrupted nuclear envelope integrity.
- All stimuli induced transient nucleosome scattering, indicating chromatin decondensation.
- iTS cells showed elevated histone demethylase expression (KDM3A, KDM4) and reduced H3K9me3.
- Pharmacological agents also induced nucleosome scattering and iTS cell conversion.
Conclusions:
- Nucleosome clustering is a responsive epigenetic feature to biophysical and chemical cues.
- Chromatin decondensation is a hallmark of induced tumor-suppressing cell generation.
- Microscale chromatin remodeling plays a role in reprogramming the tumor microenvironment for therapeutic benefit.
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