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Role of PML in nucleolar functions
 Kučerová, Alena ; Hodný, Zdeněk (advisor) ; Skalníková, Magdalena (referee)
Promyelocytic leukemia protein (PML) is a tumour suppressor which is frequently downregulated in human tumours. PML plays a role in many cellular processes including DNA damage response, senescence and apoptosis and is mainly localized in special structures called PML nuclear bodies (PML NBs). The nucleolus is a key nuclear compartment, where transcription of ribosomal DNA and biogenesis of ribosomes take place. The nucleolus is also called a stress sensor because of its role, for instance, in stabilization of tumour suppressor p53. Localization of PML to the nucleolar periphery appears to be prominent after disturbance of nucleolar functions - for example inhibition of rRNA transcription or processing. Thus the relationship between the nucleolus and PML nuclear bodies may be important for cellular response to stress. However, the role of PML nucleolar associations in nucleolar function including mechanism of formation of these structures remain unclear. Here we characterised PML nucleolar structures and mechanism of their formation. We showed that formation of PML nucleolar structures is not caused by replication stress, is not dependent on any specific phase of cell cycle and is not caused by DNA damage response but is induced by topological stress due to inhibition of toposiomerase function....
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2 Skalníková, M.
4 Skalníková, Martina
2 Skalníková, Michaela
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