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Immunological aspects of head and neck cancer in relation to etiology
Koucký, Vladimír ; Bouček, Jan (advisor) ; Říhová, Blanka (referee) ; Smilek, Pavel (referee)
Tumor immunology is a progressively developing, multidisciplinary branch of biology. Results of basic research have already been successfully translated to clinical practice. The immediate success of new immunotherapeutic drugs, especially immune checkpoint inhibitors, has further supported the expansion of basic and clinical research in this field. In the case of head and neck squamous cell carcinoma (HNSCC), some immune system elements, such as CD8+ T cells, were shown to play an important role in the progression of the disease. Importantly, HNSCC is a diverse group of diseases, and a significant number of the tumors are induced by high-risk strains of human papillomavirus (HPV). HPV-associated tumors (HPV+ ) respond better to standard therapy, and the immune system was shown to be one of the crucial factors in this phenomenon. We focused on the analysis of phenotype, function, and prognostic value in tumor-infiltrating immune cells in HNSCC patients regarding the HPV status of the tumor. We were able to detect CD8+ tumor-infiltrating T cells reacting to HPV16 antigens in the majority of HPV+ oropharyngeal cancers. Moreover, activity of these T cells was enhanced after blockade of both PD-1 and TIM-3 immune-checkpoint pathways, supporting a concept of combined immunotherapy. In our...
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Study of Epithelial Mesenchymal Interactions in Squamous Epithelium Derived Tumors
Kodet, Ondřej ; Lacina, Lukáš (advisor) ; Borovanský, Jan (referee) ; Ehrmann, Jiří (referee)
This thesis is focused on the epithelial mesenchymal interactions in tumors derived from squamous epithelium including tumors arising from minor cell population (melanocytes). This study is also reflecting aspects of epithelial glycobiology resp. the study of endogenous lectins, the galectins, in head and neck squamous carcinomas. Galectins represent, in the current concepts of cell and tumor biology molecules with a remarkable potential. Galectins participate, besides in regulation of pre- and postnatal homeostasis in normal tissues, also in many pathological processes such as autoimmune reactions or malignancies. In this thesis, we demonstrated the presence of galectin-1 and -2 and their glycoligands in interphasic and mitotic nuclei, which may contribute to regulation of the cell cycle. Furthermore, we demonstrated galectin-9 as a sensitive marker of transformation normal to the dysplastic squamous epithelium in head and neck. The epithelial mesenchymal interactions represent mechanisms, which are responsible for dynamic maintenance of the homeostasis of the organism during prenatal development, postnatal growth and during cyclic renewal of certain tissues. These interactions also participate in wound healing. On the other hand they play a crucial role in the process of tumor transformation,...
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Study of Epithelial Mesenchymal Interactions in Squamous Epithelium Derived Tumors
Kodet, Ondřej ; Lacina, Lukáš (advisor) ; Borovanský, Jan (referee) ; Ehrmann, Jiří (referee)
This thesis is focused on the epithelial mesenchymal interactions in tumors derived from squamous epithelium including tumors arising from minor cell population (melanocytes). This study is also reflecting aspects of epithelial glycobiology resp. the study of endogenous lectins, the galectins, in head and neck squamous carcinomas. Galectins represent, in the current concepts of cell and tumor biology molecules with a remarkable potential. Galectins participate, besides in regulation of pre- and postnatal homeostasis in normal tissues, also in many pathological processes such as autoimmune reactions or malignancies. In this thesis, we demonstrated the presence of galectin-1 and -2 and their glycoligands in interphasic and mitotic nuclei, which may contribute to regulation of the cell cycle. Furthermore, we demonstrated galectin-9 as a sensitive marker of transformation normal to the dysplastic squamous epithelium in head and neck. The epithelial mesenchymal interactions represent mechanisms, which are responsible for dynamic maintenance of the homeostasis of the organism during prenatal development, postnatal growth and during cyclic renewal of certain tissues. These interactions also participate in wound healing. On the other hand they play a crucial role in the process of tumor transformation,...
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