Related Experiment Video
Updated: Jun 4, 2026
09:45
Radiosensitivity of Cancer Stem Cells in Lung Cancer Cell Lines
Published on: August 21, 2019
Acute high-dose X-radiation-induced genomic changes in A549 cells
A Muradyan1, K Gilbertz, S Stabentheiner
1a Max-Planck-Inst. für Molekulare Genetik, D-14195 Berlin, Germany.
Radiation Research
|March 3, 2011
Summary
Acute ionizing radiation exposure causes significant genomic alterations and chromosomal aberrations in cancer cells. These changes, particularly at fragile sites, highlight the genome-wide stress induced by radiation.
Area of Science:
- Genomics
- Radiation Biology
- Cancer Research
Background:
- Accidents involving ionizing radiation can cause acute radiation syndrome and long-term effects like cancer.
- Understanding cellular-level responses to acute high-dose radiation is crucial for predicting health outcomes.
Purpose of the Study:
- To investigate genome-wide chromosomal aberrations induced by acute ionizing radiation in A549 adenocarcinoma cells.
- To identify specific genomic alterations and fragile sites affected by radiation exposure.
Main Methods:
- Exposing A549 cells to a 6 Gy dose of 240 kV X rays.
- Analyzing surviving clones using chromosome painting and tiling-path array comparative genomic hybridization (CGH).
- Comparing gene expression patterns between irradiated and sham-irradiated clones.
Main Results:
- Acute X-ray exposure induced translocations and changes in chromosome number in irradiated clones.
- Array CGH revealed recurrent genomic losses, with fragile sites FRA3B and FRA16D being preferential alteration regions.
- Clone 4 showed increased radiosensitivity and differential gene expression related to 'M Phase'.
Conclusions:
- A single acute radiation exposure can significantly impact the cell genome, inducing stress and alterations.
- Fragile site expression is a key feature of radiation-induced genomic instability.
- Cellular responses to radiation, including radiosensitivity and gene expression, vary among clones.
