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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Wnt signaling in intestinal homeostasis and tumorigenesis
 Janečková, Lucie ; Kořínek, Vladimír (advisor) ; Macůrek, Libor (referee) ; Truksa, Jaroslav (referee)
The canonical Wnt signaling pathway is one of the most important pathways involved in cell proliferation and differentiation. It is highly conserved in evolution and participates not only in embryonic development but also in adult tissue homeostasis. In the intestine, Wnt signaling is closely connected to maintenance of intestinal stem cells and renewal of the epithelia. Conversely, aberrant activation of the Wnt signaling pathway underlies different types of human diseases. Its constitutive activation results in neoplasia and specifically in development of colorectal cancer, which is the third most common malignancy in western world. The aim of this thesis was to uncover various aspects of the regulatory mechanisms of the Wnt/β-catenin signaling cascade. Furthermore, I headed to find novel Wnt pathway modulators and confirm their function in vivo. The results are presented in four publications. The first study examines murine Wnt proteins processing and the sequential order of Wnt post-translational modifications which are required for the secretion and signaling activity of the ligands. Next publication focuses on the gene Troy, which we identified as negative regulator of Wnt signaling. TROY was discovered as a Wnt target gene during DNA microarray profiling of human colorectal cancer cells....
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