To investigate hypoxia-induced factor-1 alpha expression in distinct oral squamous cell carcinoma subtypes and topographies and correlate with clinicopathological data. Hypoxia-induced factor-1 alpha expression was assessed by immunohistochemistry in 93 cases of OSCC. Clinical and histopathological data were reviewed from medical records. Hypoxia-induced factor-1 alpha status was distinct according to tumor location, subtype and topography affect. In superficial oral squamous cell carcinomas, most tumor cells overexpressed hypoxia-induced factor-1 alpha, whereas hypoxia-induced factor-1 alpha was restricted to the intratumoral region in conventional squamous cell carcinomas. All basaloid squamous cell carcinomas exhibited downregulation of hypoxia-induced factor-1 alpha. Interestingly, metastatic lymph nodes (91.7%, p = 0.001) and the intratumoral regions of corresponding primary tumors (58.3%, p = 0.142) showed hypoxia-induced factor-1 alpha-positive tumor cells. Overall survival was poor in patients with metastatic lymph nodes. Hypoxia-induced factor-1 alpha has distinct expression patterns in different oral squamous cell carcinoma subtypes and topographies, suggesting that low oxygen tension promotes the growth pattern of superficial and conventional squamous cell carcinoma, but not basaloid squamous cell carcinoma. Indeed, a hypoxic environment may facilitate regional metastasis, making it a useful diagnostic and prognostic marker in primary tumors.
Este estudo investigou a opinião de formandos em Odontologia de uma universidade pública sobre as Diretrizes Curriculares Nacionais (DCN) implantadas no curso. Foi realizado um estudo transversal quanti-qualitativo com aplicação de questionário aos primeiros concluintes do curso (em 2010, 2011 e 2012) após a implantação do novo currículo em uma universidade pública da região Centro-Oeste em 2006. Foi realizada estatística descritiva e análise de conteúdo temática. Dos 158 respondentes (taxa de resposta=98,8%), 60,8% relataram que já tinham ouvido falar das DCN e 36,7% tinham lido total ou parcialmente o documento das diretrizes. 63,9% dos formandos tiveram uma opinião negativa sobre a mudança curricular e esta foi associada a não leitura das DCN. Na análise qualitativa das justificativas para as opiniões, três categorias emergiram: estrutura curricular, processos de ensino-aprendizagem e perfil do egresso. As opiniões foram conflitantes na maioria dos aspectos e revelaram questões que necessitam de maior aprofundamento. Parte dos problemas ou equívocos apontados pelos estudantes referem-se à operacionalização do curso e requerem medidas de ajustes para sua superação. Concluiu-se que houve pouco conhecimento das DCN e predomínio de opiniões negativas acerca do currículo vigente entre os formandos.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2025 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.