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Transcription initiation arising from E-cadherin/CDH1 intron2: a novel protein ...
Pinheiro, Hugo; Carvalho, Joana; Oliveira, Patrícia; Ferreira, Daniel; Teixeira Pinto, Marta; Osório, Hugo; Licastro, Danilo; Bordeira-Carriço, RenataDisruption of E-cadherin (CDH1 gene) expression, subcellular localization or function arises during initiation and progression of almost 90% of all epithelial carcinomas. Nevertheless, the mechanisms through which this occurs are largely unknown. Previous studies showed the importance of CDH1 intron 2 sequences for proper gene and protein expression, supporting these as E-cadherin cis-modulators. Through RACE a...
Mixed lineage kinase 3 gene mutations in mismatch repair deficient gastrointest...
Velho, Sérgia; Oliveira, Carla; Paredes, Joana; Sousa, Sónia; Leite, Marina; Matos, Paulo; Milanezi, Fernanda; Ribeiro, Ana Sofia; Mendes, NunoMixed lineage kinase 3 (MLK3) is a serine/threonine kinase, regulating MAPkinase signalling, in which cancer-associated mutations have never been reported. In this study, 174 primary gastrointestinal cancers (48 hereditary and 126 sporadic forms) and 7 colorectal cancer cell lines were screened for MLK3 mutations. MLK3 mutations were significantly associated with MSI phenotype in primary tumours (P = 0.0005), o...
Luteolin, quercetin and ursolic acid are potent inhibitors of proliferation and...
Xavier, Cristina P. R.; Lima, Cristóvão F.; Preto, Ana; Seruca, Raquel; Ferreira, Manuel Fernandes; Wilson, Cristina PereiraKRAS and BRAF mutations are frequent in colorectal carcinoma (CRC) and have the potential to activate proliferation and survival through MAPK/ERK and/or PI3K signalling pathways. Because diet is one of the most important determinants of CRC incidence and progression, we studied the effects of the dietary phytochemicals quercetin (Q), luteolin (L) and ursolic acid (UA) on cell proliferation and apoptosis in two ...
E-Cadherin (CDH1) and p53 rather than SMAD4 and Caspase-10 germline mutations c...
Oliveira, Carla; Ferreira, Paulo; Nabais, Sérgio; Campos, Luísa; Ferreira, Ana; Cirnes, Luís; Alves, Catarina Castro; Veiga, Isabel; Fragoso, MariaApproximately 30% of all hereditary diffuse gastric cancer (HDGC) families carry CDH1 germline mutations. The other two thirds remain genetically unexplained and are probably caused by alterations in other genes. Using polymerase chain reaction (PCR)/single-strand conformation polymorphism (SSCP)/sequencing, we screened 32 Portuguese families with a history of gastric cancer and 23 patients with early onset gas...
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