Related Experiment Video
Updated: Apr 18, 2026
11:24
Measuring DNA Damage and Repair in Mouse Splenocytes After Chronic In Vivo Exposure to Very Low Doses of Beta- and Gamma-Radiation
Published on: July 3, 2015
11.6K
Circulating Alu Elements as Biomarkers for Radiation-Induced Toxicity in Cancer.
Mansi Patel1, Charmi Jyotishi2, Suresh Prajapati2
1Research and Development Cell, Parul University, Vadodara, Gujarat, India.
Genetic Testing and Molecular Biomarkers
|April 17, 2026
Summary
Alu elements, activated by radiation, drive cancer treatment response variations and genomic instability. These elements also serve as biomarkers for radiation dose and toxicity risk.
Area of Science:
- Genomics
- Molecular Biology
- Cancer Research
Background:
- Radiation therapy efficacy varies due to patient genomic differences.
- Alu elements, abundant in the human genome, are increasingly recognized for their role in cellular stress responses.
- Understanding Alu element behavior under radiation is crucial for cancer treatment.
Purpose of the Study:
- To review the biology of Alu elements, focusing on their activation by ionizing radiation.
- To explore Alu element influence on DNA damage, repair, gene regulation, and immune signaling.
- To highlight Alu elements as potential biomarkers for radiation response and toxicity.
Main Methods:
- Literature review of Alu element biology, structure, retrotransposition, methylation, and expression.
- Analysis of studies on Alu element activation by ionizing radiation.
- Examination of Alu-associated mutations, microsatellite instability, and cell-free DNA.
Main Results:
- Ionizing radiation activates Alu elements, leading to genomic destabilization, impaired DNA repair, and inflammation.
- Alu-associated mutations and microsatellite instability are linked to key cancer genes (e.g., TP53, BRCA2).
- Alu hypomethylation correlates with microsatellite instability, defective repair, and therapeutic resistance.
- Circulating Alu sequences in cell-free DNA correlate with radiation dose and toxicity.
Conclusions:
- Alu element activation is a key mechanism underlying varied patient responses to radiation therapy.
- Alu elements represent promising minimally invasive biomarkers for biodosimetry and toxicity risk stratification.
- Targeting Alu element activity may offer new therapeutic strategies for cancer treatment.
Related Concept Videos
02:59Biological Effects of Radiation
19.9K
All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
19.9K
03:18Non-LTR Retrotransposons
14.1K
As the name suggests, non-LTR retrotransposons lack the long terminal repeats characteristic of the LTR retrotransposons. Additionally, both LTR and non-LTR retrotransposons use distinct mechanisms of mobilization. Non-LTR retrotransposons are further divided into two classes - Long interspersed nuclear elements (LINEs) and short interspersed nuclear elements (SINEs), both of which occur abundantly in most mammals, including humans. Some of the active non-LTR retrotransposons in humans are L1...
14.1K
01:18Other Unique Bacteria
561
Magnetic bacteria exhibit a directed movement called magnetotaxis, driven by structures called magnetosomes. These magnetosomes consist of chains of magnetic particles made of either magnetite (Fe₃O₄) or greigite (Fe₃S₄) and are organized in a linear conformation by a protein scaffold within invaginations of the cell membrane. The bacteria align along the north–south magnetic field lines, much like a compass needle. They are typically microaerophilic or anaerobic...
561