Avaliação de marcadores moleculares relacionados ao prognóstico de pacientes com carcinoma epidermóide de cavidade oral e orofaringe
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Data
2014-08-29
Autores
Santos, Marcelo dos
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Universidade Federal do Espírito Santo
Resumo
Head and neck cancer is the fourth in incidence and the fifth in mortality among the most frequent malignancies worldwide. For 2014, there has been estimated over 15 thousand new oral and oropharynx cancers in Brasil. Similar to other tumors, oral and oropharynx cancer is a multifactorial disease, caused by multiple environmental and genetic factors, involving alterations in molecular pathways and cellular homeostasis. The investigation of molecular markers involved in this process has been the object of my studies, especially because in spite of great advances in the molecular aspects of cancer, little progress has been made in the clinical outcome during the last decades. It is known that tumor progression depends on cellular aquisition of competences, such as apoptosis evasion, cell proliferation disregulation, angiogenic activation, cellular adaptation to hipoxia, cell survival mechanism activation and hypoxia dependent epigenetic changes. Therefore, the present work had the purpose to evaluate the potential of proteins FAS, FASL, FGFR4, LEPR, HIF1-a, NDRG1 and JMJD1a, as well as polymorphisms FGFR4 Gly388Arg and LEPR Gln223Arg, as putative molecular markers for clinicopathological tumor features or oral and oropharynx squamous cell carcinoma. Our results show that HIF1-1 expression was associated with local disease relapse and local disease-free survival in patients who undertook pos-operative radiotherapy and were also related to tumor vascular microdensity. In addition, NDRG1 expression was different in tumor tissue and non tumoral margins, but also showing an association with disease survival. FGFR4 polymorphism and expression showed a relation with death and disease survival. However, FGFR4 expression alone showed an association with lymph node metastasis and relapse. FGFR4 profile showed a relation with disease survival. FAS/FASL expression showed a correlation with death and its proposed profise was related with disease survival. LEPR Gln223Arg polymorphism was realted with disease free survival and disease specific survival, whereas LEPR expression was realted with lymph node metastasis. JMJD1A nuclear and cytoplasmic expression were related with lymph node metastasis. However, only nuclear expression was related with relapse and disease survival. In conclusion, our results suggest that proteins ans polymorphisms can be used as molecular markers to help predict prognosis in oral and oropharynx squamous cell carcinoma.
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Head and neck cancer , Apoptosis , Cell proliferation , Hypoxia , Angiogenesis , Prognosis , Câncer cabeça e pescoço , Prognóstico , Apoptose , Proliferação celular , Hipóxia , Angiogênese