sistema glutation-s-transferase como fator prognóstico no carcinoma papilífero da tireoide gst genes expression as prognostic factor in papillary thyroid cancer
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ID: 189639
2009
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Abstract
OBJETIVO: Analisar se existe relação entre os fatores moleculares dos genes GTS e a mortalidade dos pacientes com câncer de tireoide dado pelo índice AMES de prognóstico clínico. MÉTODOS: Foram coletadas amostras da tireoide de 66 pacientes com carcinoma papilífero (53 mulheres e 13 homens), de modo a permitir extração do material genético das enzimas. Foram constituídos dois grupos, segundo os fatores prognósticos clínicos de alto e baixo risco, de acordo a classificação AMES. Cada grupo foi avaliado pela presença ou não do genótipo nulo para as enzimas estudadas, correlacionando-os com os fatores prognósticos clínicos (AMES). RESULTADOS: Foram analisados os resultados de 17 doentes com alto risco (grupo A) e 49 com baixo (grupo B). Todas combinações de genótipos do GSTT1 e GSTM1 foram encontrados. O genótipo nulo dos dois genes do grupo de alto risco foi encontrado em 5,8% e no de baixo risco em 6,1%. CONCLUSÃO: A presença ou deleção dos genes GST (GSTT1 e GSTM1) não são bom fatores prognósticos no câncer papilífero da tireoide.
PURPOSES: Analyze the relationship between the AMES classification and molecular factors from Glutation-S-Transferase System, specifically the GSTT1 and GSTM1 in patients with well differentiated thyroid cancer. METHODS: Samples of thyroid tissue of 66 patients with papillary thyroid carcinoma were obtained (53 women and 13 men). Patients were divided in two groups (high and low risk) according to the AMES classification. In each group, presence of the null genotype of both GST enzymes system was studied. These results were compared with the AMES classification. Samples were obtained in the operating room immediately after thyroidectomy, placed in cryotubes, immersed in liquid nitrogen and stored in a freezer at -80ºC. DNA of this enzymes was extracted by the fenol-cloroformium method. RESULTS: There were 17 high risk patients and 49 low risk patients. The null genotype of the high risk group was 5.8% and in the other group was 6.1%. CONCLUSION: There was no relationship between absence of genes GSTT1 and GSTM1 and prognosis of the papillary thyroid carcinoma when compared to the AMES classifications.
PURPOSES: Analyze the relationship between the AMES classification and molecular factors from Glutation-S-Transferase System, specifically the GSTT1 and GSTM1 in patients with well differentiated thyroid cancer. METHODS: Samples of thyroid tissue of 66 patients with papillary thyroid carcinoma were obtained (53 women and 13 men). Patients were divided in two groups (high and low risk) according to the AMES classification. In each group, presence of the null genotype of both GST enzymes system was studied. These results were compared with the AMES classification. Samples were obtained in the operating room immediately after thyroidectomy, placed in cryotubes, immersed in liquid nitrogen and stored in a freezer at -80ºC. DNA of this enzymes was extracted by the fenol-cloroformium method. RESULTS: There were 17 high risk patients and 49 low risk patients. The null genotype of the high risk group was 5.8% and in the other group was 6.1%. CONCLUSION: There was no relationship between absence of genes GSTT1 and GSTM1 and prognosis of the papillary thyroid carcinoma when compared to the AMES classifications.
| Reference Key |
gonalves2009revistasistema
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| Authors | ;Antonio Jose Gonçalves;Osmar Monte;Eliane Cristina Morari;Laura Sterian Ward;Diana Shimoda Nakasako;Juliana Nieto;Marianne Yumi Nakai |
| Journal | acta crystallographica section e |
| Year | 2009 |
| DOI |
10.1590/S0104-42302009000300019
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