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The clinical relevance of immunogenic cell death associated signalling and molecules in cancer therapy
Holíček, Peter ; Palich Fučíková, Jitka (advisor) ; Říhová, Blanka (referee) ; Starková, Júlia (referee)
The clinical relevance of immunogenic cell death-associated signaling and molecules in cancer therapy The capacity of cancer cells to induce anticancer immune responses relies on multiple factors, including the antigenic repertoire of cancer cells and their ability to provide adjuvant signals, as represented by danger-associated molecular patterns (DAMPs), which are exposed and released by malignant cells during immunogenic cell death (ICD). The release and secretion of DAMPs can orchestrate the activation of innate and adaptive tumor-targeting immunity, resulting in tumor regression. Various chemotherapies, radiation therapy, physical modalities, and targeted anticancer agents have been described as potent ICD inducers, which besides being directly cytotoxic, can activate clinically relevant anticancer immune responses. Therefore, patients whose tumor microenvironment (TME) is shows defective DAMP release or downstream DAMP-sensing signaling pathways do not fully benefit from ICD-inducing treatments, which can lead to overall therapeutic failure. My dissertation contributes to this field by exploring the impact of ICD on the development of innate anticancer immune responses, with a particular focus on natural killer (NK) cells, showing that surface-exposed calreticulin (ecto-CALR) positively impacts the...
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Activation and regulation of cell death in senescent cancer cells.
Holíček, Peter ; Anděra, Ladislav (advisor) ; Drbal, Karel (referee)
Cellular senescence is a distinct cell state, characteristic by cessation of cell proliferation and it is accompanied by specific morphological and biochemical alterations. Increasing and persisting incidence of senescence cells has been shown to have detrimental effect on an organism largely contributing to its ageing. Senescent cells also positively support tumour growth and can even stimulate carcinogenic transformation of surrounding cells. Moreover, senescence can be induced even in tumour cells spontaneously or by chemotherapy. Regardless of an initial stimuli and type of cells, there are two main senescence inducing pathways p16/pRb and p53/p21. Both senescent cells as well as senescent cancer cells seems to have modified apoptotic signalling at the level of mitochondria and Bcl-2 family proteins. In this study, we aimed to analyse effect of senescent state as well as pre-senescent (growth arrested state) induced by p16/pRb and p53/p21 signalling pathways on the response of H28 mesothelioma cancer cells-derived clonal cultures to various cell death-inducing stimuli. By inducible expression of p16 and p21 proteins in doxycycline-dependent manner, we forced cells to acquire senescent-like phenotype, which we detailly characterised. Our results showed that senescent-like phenotype, manifests...
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Activation and regulation of cell death in senescent cancer cells.
Holíček, Peter ; Anděra, Ladislav (advisor) ; Drbal, Karel (referee)
Cellular senescence is a distinct cell state, characteristic by cessation of cell proliferation and it is accompanied by specific morphological and biochemical alterations. Increasing and persisting incidence of senescence cells has been shown to have detrimental effect on an organism largely contributing to its ageing. Senescent cells also positively support tumour growth and can even stimulate carcinogenic transformation of surrounding cells. Moreover, senescence can be induced even in tumour cells spontaneously or by chemotherapy. Regardless of an initial stimuli and type of cells, there are two main senescence inducing pathways p16/pRb and p53/p21. Both senescent cells as well as senescent cancer cells seems to have modified apoptotic signalling at the level of mitochondria and Bcl-2 family proteins. In this study, we aimed to analyse effect of senescent state as well as pre-senescent (growth arrested state) induced by p16/pRb and p53/p21 signalling pathways on the response of H28 mesothelioma cancer cells-derived clonal cultures to various cell death-inducing stimuli. By inducible expression of p16 and p21 proteins in doxycycline-dependent manner, we forced cells to acquire senescent-like phenotype, which we detailly characterised. Our results showed that senescent-like phenotype, manifests...
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