Chromosomal aberrations in patients exposed to X-rays and contrast medium

Area of Science:

• Medical Imaging
• Radiation Biology
• Genetics

Background:

• Diagnostic X-ray examinations utilize contrast media to enhance imaging.
• Chromosomal aberrations in lymphocytes can be biomarkers of radiation exposure.
• Previous studies have focused on radiation-induced chromosomal damage.

Purpose of the Study:

• To investigate the cause of increased chromosomal aberrations observed after X-ray examinations with contrast media.
• To differentiate the effects of X-ray radiation from the effects of contrast media on chromosomal stability.

Main Methods:

• Peripheral lymphocytes were collected from four patients before and after X-ray examination with contrast medium.
• The frequency of chromosomal aberrations, specifically dicentrics, was quantified.
• In vitro experiments were conducted to assess inherent chromosomal radiosensitivity.

Main Results:

• A significant seven-fold increase in dicentric aberrations was observed post-examination compared to pre-examination levels.
• The observed aberration frequency was too high to be solely attributed to the radiation dose.
• In vitro tests showed no predisposition to chromosomal radiosensitivity among the patients.

Conclusions:

• The application of contrast medium during X-ray diagnosis is a likely inducer of the observed increase in chromosomal aberrations.
• Contrast media may possess properties that elevate chromosomal instability beyond the effects of ionizing radiation.
• Further investigation into the genotoxic potential of contrast media is warranted.