8,700 Studies Reviewed. 87.0% Found Biological Effects. The Evidence is Clear.
Shield Your Body
Whole Body / General796 citations

Thymidine decreases the DNA damage and apoptosis caused by tumor-treating fields in cancer cell lines

Bioeffects Seen

Jeong H, Jo Y, Yoon M, Hong S · 2021

Share:

Thymidine pretreatment appears to protect cells from the DNA-damaging and apoptotic effects of tumor-treating fields, suggesting potential for reducing side effects when combining TTFields with conventional cancer treatments.

Plain English Summary

Summary written for general audiences

This study examined whether thymidine could mitigate DNA damage and apoptosis caused by tumor-treating fields (TTFields), which use alternating electric fields for cancer treatment. Researchers exposed human cancer cells and normal cells to TTFields at 120 kHz with or without thymidine cell cycle arrest, finding that thymidine-treated cells showed no significant changes in colony formation, apoptosis, DNA damage, or related gene expression, whereas untreated cells showed decreased colony formation and increased DNA damage markers.

Why This Matters

Tumor-treating fields represent an emerging cancer treatment modality that uses intermediate-frequency electric fields to disrupt cell division. The protective mechanism of thymidine likely relates to cell cycle arrest at G1/S phase, which may render cells less susceptible to the mitotic disruption caused by TTFields exposure.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Jeong H, Jo Y, Yoon M, Hong S (2021). Thymidine decreases the DNA damage and apoptosis caused by tumor-treating fields in cancer cell lines.
Show BibTeX
@article{jeong_h_jo_y_yoon_m_hong_s_ce4059,
  author = {Jeong H and Jo Y and Yoon M and Hong S},
  title = {Thymidine decreases the DNA damage and apoptosis caused by tumor-treating fields in cancer cell lines},
  year = {2021},
  doi = {10.1038/s41586-021-03767-x},
  
}
DOI: 10.1038/s41586-021-03767-xPubMed: 33950471

Quick Questions About This Study

Genetic variations can make some people more susceptible to environmental factors like infections or toxins while others remain relatively protected. This study found 13 genetic locations that influence COVID-19 outcomes, demonstrating that identical exposures can produce vastly different health effects based on individual genetic makeup.
Yes, genome-wide association studies like this COVID-19 research could identify genetic factors that make some people more sensitive to electromagnetic fields. This approach could explain why EMF symptoms vary so dramatically between individuals and help develop personalized exposure guidelines.
Large sample sizes from diverse populations are essential for detecting genetic associations with complex diseases. Smaller studies often miss important genetic factors, which may explain why some EMF health studies show conflicting results when they use insufficient sample sizes.
Mendelian randomization uses genetic variations as natural experiments to determine if factors like smoking actually cause disease rather than just correlate with it. This technique confirmed smoking increases severe COVID-19 risk and could similarly clarify whether EMF exposure truly causes reported health effects.
Global research networks like this COVID-19 consortium enable larger studies with more diverse populations, leading to more reliable findings. Similar collaborative approaches in EMF research could overcome the limitations of small, isolated studies that currently dominate the field.