National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
The role of inflammatory signaling in cancer cell invasiveness
Šůchová, Anna-Marie ; Brábek, Jan (advisor) ; Brdička, Tomáš (referee)
Metastasizing is responsible for 90% of death in cancer patients. Metastatic tumour cells have several strategies that they use to invade surrounding tissues - they can migrate together or individually. When individual cells migrate, tumour cells adopt two different morphologies. They are either elongated and migrate using the proteolytically active mesenchymal mode, or they are rounded and migrate in the amoeboid mode. Metastatic tumour cells can switch between these modes, which complicates the development of effective migrastatics. In this work, we focused on the effect of inflammatory signalling on metastatic cell migration. We worked with cell lines of malignant human melanoma, which adopt a mixed morphology and show both amoeboid and mesenchymal phenotype during migration. Upon stimulation of melanoma human cells with interferon beta, a mesenchymal to amoeboid transition occurs. Interferon beta appears to induce amoeboid morphology by maintaining high levels of the ISGF3 complex, which is composed of the heterodimer of STAT 1 and STAT 2 proteins and the IRF9 protein. Upon blocking of Jak / Stat signalling pathway by negative regulators, human melanoma cells return to mesenchymal morphology. Key words - invasiveness, mesenchymal-ameboid transition, interferons, inflammation, migration, metastases
Influence of fetal microchimerism on breast carcinoma in mothers
Šůchová, Anna-Marie ; Hromadníková, Ilona (advisor) ; Balounová, Jana (referee)
Fetal microchimerism is a condition where fetal cells are present in the body of the mother, they are transmitted during pregnancy and may persist for several decades after parturition. Their presence affects the immune system of the mother, which is investigated in both autoimmune and tumor diseases. This work, as a literature review, summarizes the current knowledge of the effect of fetal microchimerism on breast carcinomas in mothers, which is one of the most common cancer in women worldwide. It is based on studies that examined the presence of fetal cells in peripheral blood and neoplastic maternal tissues. While the correlation between the presence of fetal microchimerism in peripheral blood and breast cancer suggests a possible protective role, the data on the investigation of the same correlation in neoplastic tissue are not so unambiguous. Some of them suggest a protective role, others have a negative role. Key words - fetal microchimerism, breast carcinoma, pathogenesis, oncology, tumor