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Biomarkers used to assess radio- and chemotherapy-induced lymphocyte genome instability in a case of cerebral infarction during relapse of a testicular seminoma (CROSBI ID 213141)

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Gamulin, Marija ; Pastuhović, Ana ; Šantek, Fedor ; Grgić, Mislav ; Kopjar, Nevenka Biomarkers used to assess radio- and chemotherapy-induced lymphocyte genome instability in a case of cerebral infarction during relapse of a testicular seminoma // Biomonitoring, 1 (2014), 1; 25-38. doi: 10.2478/bimo-2014-0003

Podaci o odgovornosti

Gamulin, Marija ; Pastuhović, Ana ; Šantek, Fedor ; Grgić, Mislav ; Kopjar, Nevenka

engleski

Biomarkers used to assess radio- and chemotherapy-induced lymphocyte genome instability in a case of cerebral infarction during relapse of a testicular seminoma

We report a case of a testicular seminoma patient with relapse who was irradiated after acute cerebral infarction induced by cisplatin- based chemotherapy. Lymphocytic genome instability was studied using an alkaline comet assay, analysis of structural chromosome aberrations, and cytokinesis-block micronucleus assay in blood samples collected before and after PET CT scanning that preceded radiotherapy, as well as before the administration of the first and after the administration of the last fraction of 3D conformal radiation. A challenge test with hydrogen peroxide (H2O2) was performed on isolated peripheral blood lymphocytes in order to establish to what extent earlier therapies had modified the response of the patient’s DNA to external stimuli with a genotoxic chemical. Levels of primary DNA damage in lymphocytes increased after diagnostic exposure, lowered prior to administration of a conformal 3D radiotherapy, and were the highest at the end of radiotherapy. Ex vivo exposure to H2O2 caused additional lymphocyte DNA damage, which gradually increased 15 and 30 minutes after treatment. Diagnostic and therapeutic exposure to radiation caused measurable cytogenetic damage that was subjected to extensive repair. All of the obtained results point to increased genomic instability in the patient which should be taken into account in his future medical surveillance.

Cisplatin-based chemotherapy; chromosome aberrations; comet assay; irradiation; lymphocyte; micronucleus; testicular cancer

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Podaci o izdanju

1 (1)

2014.

25-38

objavljeno

2300-4606

10.2478/bimo-2014-0003

Povezanost rada

Kliničke medicinske znanosti, Biologija

Poveznice