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Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition
Published on: March 11, 2021
Why do we need a new paradigm in radiobiology?
1Department of Environmental Science, University of Eastern Finland, Kuopio Campus, PL 1627, 70211 Kuopio, Finland.
Mutation Research
|January 19, 2010
Summary
New biological evidence challenges long-held radiobiology principles. Cellular epigenetic organization, specifically high dimensional dynamic attractors, explains stress-induced genomic instability and radiation effects beyond DNA damage.
Area of Science:
- Cellular Biology
- Radiobiology
- Epigenetics
Background:
- Experimental evidence over 20 years questions fundamental biological and radiobiological principles.
- Cellular organizational (epigenetic) features are crucial for accommodating new findings.
Purpose of the Study:
- To present a framework incorporating new evidence on cellular organization.
- To explore the role of high dimensional dynamic attractors in representing phenotype and genomic instability.
Main Methods:
- Conceptual framework integrating epigenetic regulation and dynamic attractors.
- Analysis of how attractor robustness influences cellular response to stress and radiation.
Main Results:
- High dimensional dynamic attractors represent cellular phenotype.
- Limited attractor robustness explains stress-induced genomic instability.
- Radiation events can cause transitions to variant attractors, leading to loss of stability (type B effects).
Conclusions:
- Type B radiation effects are distinct from conventional (type A) effects and relate to loss of evolutionary stability, not direct DNA damage.
- This model offers a new perspective on radiation risk assessment.
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