Navegando por Assunto "Transportador de glucose tipo 1"

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Extranodal nasal NK/T-Cell Lymphoma: a rare oral presentation and FASN, CD44 and GLUT-1 Expression
(2013) PONTES, Hélder Antônio Rebelo; PONTES, Flávia Sirotheau Corrêa; SILVA, Brunno Santos de Freitas; FONSECA, Felipe Paiva; ANDRADE, Bruno Augusto Benevenuto de; RIZO, Victor Hugo Toral; ROMAÑACH, Mário José; LEÓN, Jorge Esquiche; ALMEIDA, Oslei Paes de
Extranodal natural killer (NK)/T-cell lymphoma is an aggressive malignant tumor with distinctive clinicopathological features, characterized by vascular invasion and destruction, prominent necrosis, cytotoxic lymphocyte phenotype and a strong association with Epstein-Barr virus. Here is reported an extranodal nasal NK/T-cell lymphoma case, involving the maxillary sinus, floor of the orbit, and interestingly extending to the oral cavity through the alveolar bone and buccal mucosa, preserving the palate, leading to a primary misdiagnosis of aggressive periodontal disease. Moreover, this work investigated for the first time the immunohistochemical expression of fatty acid synthase (FASN) and glucose transporter 1 (GLUT-1) proteins in this neoplasia. FASN showed strong cytoplasmatic expression in the neoplastic cells, whereas GLUT-1 and CD44 were negative. These findings suggest that the expression of FASN and the loss of CD44 might be involved in the pathogenesis of the extranodal nasal NK/T-cell lymphoma, and that GLUT-1 may not participate in the survival adaptation of the tumor cells to the hypoxic environment. Further studies with larger series are required to confirm these initial results.