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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Derivation and characterization of tumor cell lines labeled with fluorescent proteins
 Majerová, Miriam ; Šmahel, Michal (advisor) ; Drbal, Karel (referee)
The effective treatment of cancer is hindered by the mechanisms of tumor cells allowing them to escape from immunosurveillance. One such mechanism is the downregulation of MHC I expression by tumor cells. As a result, CD8+ T lymphocytes are not able to eliminate tumor cells. These cells are often characterized by different expression of MHC I, which leads to the heterogeneity of the tumor environment. This thesis describes a production of a model of MHC I heterogeneity in tumors. Expression plasmids carrying genes for FP were created. Tumor cell lines TC-1, TC-1/A9 and TC-1/dB2m with different expression of MHC I molecules were successfully labeled with these plasmids. When monitoring stability of FP expression by these cell lines, a decrease was observed both in vitro and in vivo. The assumption that the cytokine environment of the tumor induces FP expression could not be confirmed because of unstable FP expression. In a tumor from a mixture of TC-1+TC-1/dB2m cell lines, it was possible to distinguish between these two lines based on the expression of β2m. In a mixture of TC- 1/A9+TC-1/dB2m lines, that could not be done due to the heterogeneity of TC-1/A9 MHC I expression. The use of combined immunotherapy showed the greatest impact on immune cell infiltration in tumors from a mixture of TC-1+...
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Factors affecting the efficacy of anti-tumor therapy by blocking the PD-1/PD-L1 signaling pathway and predictive biomarkers of this treatment
 Majerová, Miriam ; Šmahel, Michal (advisor) ; Krulová, Magdaléna (referee)
In recent years there has been a focus on cancer therapies that use patient's immune system instead of invasive traditional methods. One such method of immunotherapy is using checkpoint inhibitors. Blockade of PD-1/PD-L1 signaling pathway is one of main immunotherapy approaches utilizing patient's immune cells to combat cancer cells. Despite of positives that come along with this blockade, many patients do not respond to treatment. Therefore, better understanding of immune mechanisms and factors that affect the efficacy is needed. Finding and summarizing predictive biomarkers play an important role in selection of patients with highest chances of positive outcome and it could result in higher percentage of positively responding patients. It could also prevent patients from experiencing adverse events and unnecessary discomfort. Key words: immune checkpoints, immunotherapy, inhibitors, PD-1, PD-L1, biomarkers
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See also: similar author names
8 MAJEROVÁ, Markéta
5 MAJEROVÁ, Martina
1 MAJEROVÁ, Miroslava
4 MAJEROVÁ, Monika
3 Majerová, Marie
8 Majerová, Markéta
5 Majerová, Martina
4 Majerová, Michaela
4 Majerová, Monika
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