Navegando por Autor "Tajara, Eloiza Helena"
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Artigo HIF-1alpha expression profile in intratumoral and peritumoral inflammatory cells as a prognostic marker for squamous cell carcinoma of the oral cavity(Public Library of Science, 2014-01-09) Mendes, Suzanny Oliveira; Santos, Marcelo dos; Peterle, Gabriela Tonini; Maia, Lucas de Lima; Stur, Elaine; Agostini, Lidiane Pignaton; Carvalho, Marcos Brasilino de; Tajara, Eloiza Helena; Louro, Iúri Drumond; Trivilin, Leonardo Oliveira; Silva-Conforti, Adriana Madeira Álvares daThe HIF-1 transcriptional complex is responsible for controlling transcription of over 100 genes involved in cell hypoxia response. HIF-1alpha subunit is stabilized in hypoxia conditions, creating the HIF-1 nuclear transcription factor. In inflammatory cells, high HIF-1alpha expression induces lymphocytic immunosuppression, decreasing tumoral antigen recognition, which promotes tumor growth. The present work investigated the relationship between HIF-1alpha expression in lymphocytes populating the intratumoral and peritumoral region of 56 patients with oral cancer. Our data indicates a prognostic value for this expression. High HIF-1alpha expression in peritumoral inflammatory cells is significantly related to worse patient outcome, whereas high expression in the intratumoral lymphoid cells correlates with a better prognosis. A risk profile indicating the chance of disease relapse and death was designed based on HIF-1alpha expression in tumoral inflammatory cells, defining low, intermediate and high risks. This risk profile was able to determine that high HIF-1alpha expression in peritumoral cells correlates with worse prognosis, independently of intratumoral expression. Low HIF-1alpha in tumor margins and high expression in the tumor was considered a low risk profile, showing no cases of disease relapse and disease related death. Intermediate risk was associated with low expression in tumor and tumor margins. Our results suggest that HIF-1alpha expression in tumor and peritumoral inflammatory cells may play an important role as prognostic tumor markerArtigo JMJD1A, H3K9me1, H3K9me2 and ADM expression as prognostic markers in oral and oropharyngeal squamous cell carcinoma(Public Library of Science, 2018-03-28) Maia, Lucas de Lima; Peterle, Gabriela Tonini; Santos, Marcelo dos; Trivilin, Leonardo Oliveira; Mendes, Suzanny Oliveira; Oliveira, Mayara Mota de; Santos, Joaquim Gasparini dos; Stur, Elaine; Agostini, Lidiane Pignaton; Couto, Cinthia Vidal Monteiro da Silva; Dalbo, Juliana; Assis, Arícia Leone Evangelista Monteiro de; Archanjo, Anderson Barros; Mercante, Ana Maria Da Cunha; Lopez, Rossana Veronica Mendoza; Nunes, Fábio Daumas; Carvalho, Marcos Brasilino de; Tajara, Eloiza Helena; Louro, Iúri Drumond; Álvares-da-Silva, Adriana MadeiraAims: Jumonji Domain-Containing 1A (JMJD1A) protein promotes demethylation of histones, especially at lysin-9 of di-methylated histone H3 (H3K9me2) or mono-methylated (H3K9me1). Increased levels of H3 histone methylation at lysin-9 (H3K9) is related to tumor suppressor gene silencing. JMJD1A gene target Adrenomeduline (ADM) has shown to promote cell growth and tumorigenesis. JMJD1A and ADM expression, as well as H3K9 methylation level have been related with development risk and prognosis of several tumor types. Methods and results: We aimed to evaluate JMJD1A, ADM, H3K9me1 and H3K9me2expression in paraffinembedded tissue microarrays from 84 oral and oropharyngeal squamous cell carcinoma samples through immunohistochemistry analysis. Our results showed that nuclear JMJD1A expression was related to lymph node metastasis risk. In addition, JMJD1A cytoplasmic expression was an independent risk marker for advanced tumor stages. H3K9me1 cytoplasmic expression was associated with reduced disease-specific death risk. Furthermore, high H3K9me2 nuclear expression was associated with worse specific-disease and disease-free survival. Finally, high ADM cytoplasmic expression was an independent marker of lymph node metastasis risk. Conclusion: JMJD1A, H3K9me1/2 and ADM expression may be predictor markers of progression and prognosis in oral and oropharynx cancer patients, as well as putative therapeutic targets