National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
The role of iron in the regulation of proteins connected with tamoxifen-resistance
Potomová, Petra ; Truksa, Jaroslav (advisor) ; Balušíková, Kamila (referee)
Cancer cells are highly dependent on nutrient uptake to sustain their increased proliferation, one of these nutrients being iron. In recent years, a heightened dependency on iron was observed in cancer cells, allowing for the proper function of numerous enzymes, DNA synthesis and mitochondrial respiration. Here, we further delve into the iron metabolism of malignant cells, attempting to understand the differences between tamoxifen-sensitive and resistant (Tam5R) ones using two breast cancer cell lines of luminal A origin, MCF7 and T47D. These cells show numerous changes in iron homeostasis and iron-dependent mechanisms. Based on alterations in proteomes of Tam5R cell lines, we focused on iron regulation of proteins that are deregulated in tamoxifen resistance - assessing their regulation on transcriptional (mRNA) and post-transcriptional level (protein) as well as comparing their responsiveness to their sensitive parental cell line. We assessed two main types of regulation - iron-responsive element interaction with iron-regulatory proteins (IRE-IRP pathway) and tristetraprolin (TTP) driven mRNA degradation via AU-rich elements (ARE). Using iron loading and chelation, we challenged the cells - confirming the known IRE-IRP regulation of ferritin heavy chain (FTH), transferrin receptor 1 (TfR1),...
Unconventional protocols in treatment of glioblastoma
Potomová, Petra ; Kubíková, Iva (advisor) ; Škvárová, Karolina (referee)
Glioblastoma multiforme is one of the tumours defying the treatment that is currently in use (radiotherapy and chemotherapy). Due to the failure in its complete repression, new methods were developed, methods that do not fulfil the traditional expectation about oncological treatment. But it's these methods that could lead to inhibition of further proliferation and growth of the tumour. Therapies, like anti-angiogenesis, ketogenic diet, photothermal therapy or ferroptosis, can be targeted against the tumour and significantly tip the oncological treatment in favour of patients and doctors. Despite the need to optimize them due to side effects, added toxicity or development of resistance, they play a vital role in the future of oncology. Keywords: glioblastoma multiforme, oncological treatment; anti-angiogenic therapy, ketogenic diet, photothermal therapy, ferroptosis

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