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tom 54
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nr 4
717-726
EN
Cancer stem cells are a small subset of cancer cells constituting a reservoir of self-sustaining cells with the exclusive ability to self-renew and maintain the tumor. These cells are identified by specific stem cell markers: antigens, molecules and signaling pathways. Transcription factors and molecules associated with oncogenesis, such as NF-κB, Bmi-1, Notch, WNT beta-catenin, Sonic hedgehog and their biochemical pathways, active only in a small minority of cancer cells might play key roles in determining the biology and the overall long-term behavior of a tumor. The molecules and pathways specific for cancer stem cells, which contribute to their drug resistance, are potential targets for new therapeutic strategies.
EN
The aim of this study was to investigate the effect of brachytherapy on lipid peroxidation and antioxidant status in patients with uterine cervix cancer. The study was conducted on 84 uterine cervix cancer patients from the Brachytherapy Department of the Regional Centre of Oncology in Bydgoszcz. Patients with uterine cervix cancer were found to have elevated levels of lipid peroxidation and antioxidant defence system impairment relative to healthy females. The results of the study indicate that brachytherapy has no direct effect on the antioxidant system of patients with uterine cervical carcinoma. However, the normalisation of catalase and glutathione peroxidase activity and erythrocyte TBARS level observed six months after the end of therapy may be due to the arrest of the progression of the disease.
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