DNA double-strand breaks after percutaneous transluminal angioplasty

Radiology
Dominik GeiselHans-Joachim Wagner

Abstract

To determine exemplarily the amount of DNA damage and the repair kinetics after interventional radiologic procedures by using visualization of foci of the phosphorylated form of the H2AX histone variant (gammaH2AX) to quantify DNA double-strand breaks (DSBs) at percutaneous transluminal angioplasty (PTA) of the lower limb arteries. After local ethics committee approval and written informed consent were obtained, five patients (two women, three men; mean age, 64.4 years; age range, 45-76 years) scheduled for computed tomography (CT) and 20 patients (six women, 14 men; mean age, 68.5 years; age range, 53-85 years) scheduled for PTA of lower limb arteries were prospectively entered into the study. Blood samples were taken before the first exposure to ionizing radiation and 5 minutes, 1 hour, 6 hours, and 24 hours after the last exposure. Additional samples were taken from the irradiated limb (femoral vein) of three patients who underwent PTA--before the first radiation exposure, 5 and 10 minutes after the first exposure, and 5 minutes after the last exposure. Lymphocytes were isolated, fixed, and stained with anti-gammaH2AX antibody, and gammaH2AX focus yields were determined with fluorescence microscopy. Data were analyzed with l...Continue Reading

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