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1.
Rev. Col. Bras. Cir ; 37(2): 128-134, mar.-abr. 2010. graf, tab
Article in Portuguese | LILACS | ID: lil-550075

ABSTRACT

OBJETIVO: Avaliar a expressão imunohistoquímica de p53 e ki-67 na carcinogênese esofágica induzida quimicamente através do uso de dietilnitrosamina, em um grupo de 100 camundongos fêmeas. MÉTODOS: O estudo experimental foi realizado com quatro grupos de animais, onde os grupos I e II foram considerados controles, sendo diferenciados por gavagem esofágica, uma vez semana, com água fria (temperatura ambiente) ou quente (60º-70ºC). E os grupos III e IV foram considerados estudos, os quais receberam dietilnitrosamina por três dias consecutivos semanalmente, também sendo diferenciados por gavagem, uma vez por semana, com água fria ou quente. O estudo apresentou datas progressivas de sacrifícios com coleta de peças esofágicas, que iniciava aos 30 dias de experimento e terminava aos 150 dias. Demonstrou-se que não houve diferença na incidência tumoral quando foi acrescida a variável temperatura da água; provavelmente devido ao episódio único semanal que era adicionado ao animal em experimentação. RESULTADOS: A análise imunohistoquímica do p53 não evidenciou diferença estatística durante a evolução da carcinogênese até 150 dias, porém quando analisado a relação com alterações patológicas demonstra-se que apresenta significância em relação à patologia baixo grau de displasia, alto grau e carcinoma. CONCLUSÃO: A análise imunohistoquímica do ki-67 demonstrou diferença estatística durante a evolução da carcinogênese a partir do dia 120 de experimento e quando analisada a relação com alterações patológicas demonstrou-se que apresenta significância também em relação à lesão intraepitelial de alto grau e carcinoma.


OBJECTIVE:To evaluate the expression of P53 and Ki-67 during esophageal diethylnitrosamine (DEN)-induced carcinogenesis in 100 mice by immunohistochemistry. METHODS: The animals were assigned to 4 groups, receiving water and food ad libitum. Control groups I and II received weekly esophageal gavage with cold (room temperature) or hot (60-70ºC) water, respectively. Experimental groups III and IV were treated with DEN for 3 consecutive days during the week, and one weekly gavage as above. The mice were sacrificed in different periods from day 30 to day 150 after the beginning of the experiment, for collection of esophageal samples which were then submitted to microscopic and immunohistochemical analyses. The temperature of the water administered by gavage was not related to the frequency of esophageal tumors. RESULTS:The expression of Ki-67 was significantly higher in high-grade intraepithelial lesion (I.L.), and the expression of P53 was also higher in low-grade I.L. CONCLUSION:The results emphasize the direct relationship of the carcinogenic process with early cell alterations detected by immunohistochemistry.


Subject(s)
Animals , Female , Mice , Carcinoma, Squamous Cell/immunology , Esophageal Neoplasms/immunology , /biosynthesis , /biosynthesis , Carcinoma, Squamous Cell/chemically induced , Diethylnitrosamine/administration & dosage , Esophageal Neoplasms/chemically induced , Immunohistochemistry
2.
Rev. Assoc. Med. Bras. (1992) ; 53(4): 360-364, jul.-ago. 2007. tab
Article in Portuguese | LILACS | ID: lil-460309

ABSTRACT

OBJETIVO: O esôfago de Barrett (EB) é conseqüência do refluxo gastroesofágico crônico e considerado fator de risco para o desenvolvimento de adenocarcinoma. Estudos do muco, em especial das mucinas ácidas representadas pelas sialomucinas presentes nas células caliciformes, mostraram que na metaplasia do tipo intestinal, o epitélio do órgão pode expressar antígenos denominados Tn e Stn. Estes antígenos já foram analisados em tumores gástricos e colônicos, porém não foram encontradas referências à sua utilização no EB. Este trabalho objetivou analisar estes antígenos em doentes com EB e em adenocarcinoma associado ao EB. MÉTODOS: Foram estudados, utilizando testes imunohistoquímicos, os antígenos Tn e Stn, nas biópsias endoscópicas de 29 doentes com EB, sete com adenocarcinoma no EB, além de oito indivíduos com epitélio esofágico normal. RESULTADOS: Nas células caliciformes, foi observada positividade para Stn em 100 por cento dos casos e para Tn em 48 por cento dos casos. Nas células colunares, o Stn foi sempre negativo, enquanto o Tn foi positivo em 100 por cento dos casos. Entretanto, nos doentes com adenocarcinoma no EB, a positividade para ambos os antígenos foi de 100 por cento. Nos indivíduos normais, houve positividade para o antígeno Tn e negatividade para Stn em todos os casos (100 por cento). CONCLUSÃO: É provável que nos doentes com EB a positividade para o Tn, à semelhança do ocorrido quanto à positividade do mesmo antígeno nos portadores de adenocarcinoma, possa significar maior suscetibilidade para ocorrência futura de câncer. Assim, a pesquisa das sialomucinas poderá ser rotineiramente utilizada, contribuindo como fator prognóstico para desenvolvimento de adenocarcinoma no EB.


OBJECIVE: Barrett's esophagus (BE) is a consequence of chronic gastroesophageal reflux and is considered a risk factor for adenocarcinoma. The study of the mucus, especially acid mucins, such as the sialomucins in the goblet cells which characterize BE, showed that in intestinal metaplasia, frequent in the digestive tract, the organ's original epithelium could express Tn and Stn antigens. These antigens have already been detected in gastric and colonic tumors, however references in BE were not found. This research aimed to analyze these antigens in patients with BE and in adenocarcinoma associated with BE. METHODS: Utilizing immunohistochemistry tests, Tn and Stn antigens were studied in the endoscopic biopsies of 29 patients with BE and seven with adenocarcinoma in BE, as well as eight individuals with normal esophageal epithelium at upper digestive endoscopy.. RESULTS: The Stn antigen was positive in the goblet cells of patients with BE in 100 percent of the cases and the Tn was positive in 48 percent. In the columnar cells, Stn was always negative, while Tn was positive in 100 percent of the cases. However, in adenocarcinoma in BE, both antigens were 100 percent positive. In normal individuals, the Tn antigen was positive and the antigen Stn negative in all cases. CONCLUSION: It is probable that the BE group in which the Tn antigens in the goblet cells are positive, similarly to the same antigen in the adenocarcinoma group, might indicate a higher susceptibility for potential occurrence of cancer. In the future, trials with sialomucins could be used routinely, thereby contributing as a prognostic factor of adenocarcinoma in BE.


Subject(s)
Adult , Aged , Female , Humans , Male , Middle Aged , Adenocarcinoma/immunology , Barrett Esophagus/immunology , Esophageal Neoplasms/immunology , Sialomucins/analysis , Adenocarcinoma/etiology , Adenocarcinoma/pathology , Antigens, Tumor-Associated, Carbohydrate/analysis , Biopsy , Barrett Esophagus/complications , Barrett Esophagus/pathology , Case-Control Studies , Endoscopy, Gastrointestinal , Esophageal Neoplasms/etiology , Esophageal Neoplasms/pathology , Esophagus/immunology , Immunohistochemistry , Sialomucins/immunology , Biomarkers, Tumor/analysis
3.
Article in English | IMSEAR | ID: sea-46818

ABSTRACT

Primary small cell carcinoma of esophagus (SCC) is a rare disease but has more aggressive behavior than esophageal squamous cell carcinoma (SQC). The distinction of SCC from SQC is very important therapeutically. Few systematic studies of immunohistochemical analysis to differentiate primary esophageal SCC with concomitant SQC, and adjacent normal esophageal epithelium have been reported. The objective of this study is to know the immunohistochemical markers in distinguishing SCC from SQC of esophagus. We studied 6 cases of primary esophageal SCC histologically and immunohistochemically using 15 different antibodies including a cytokeratin (CK) panel and neuroendocrine markers. Pure SCCs were identified in 2 of the 6 cases (33.3%), and the remaining 4 cases (66.7%) were found to exhibit combined SCC with an SQC component. Among the combined types, in situ SQC was observed in all 4 cases (100.0%) and invasive SQC was observed in 3 cases (75.0%). Among the normal esophageal epithelia specimens (n=7), CK14 expression was seen 6 out of 7 (85.7%) specimens and CKAE1/3 in 5 out of 7 (71.4%) specimens. CD56 was more frequently expressed among the SCC specimens (4/6; 66.7%) than among the SQC specimens (0/4; 0%; p = 0.07). The expression of p53 protein in SCC (4/6; 66.7%) and SQC (3/4; 75.0%) specimens was significantly more frequent than in normal esophageal epithelium (0/7; 0%; p = 0.02 each). Neurone-specific enolase (NSE), synaptophysin, and CKAE1/3 were expressed in 83.3%, 66.7%, and 66.7% of the SCC cases (n=6), respectively. NSE expression was significantly more frequent in SCC specimens (5/6; 83.3%) (p = 0.02) than in normal esophageal epithelium (0/7; 0%; p = 0.02). However, the frequencies of NSE expression in SCC (5/6; 83.3%) and SQC (2/4; 50%) were not significantly different. All of the SQC specimens (n=4) expressed CK14 and CKAE1/3. The CK14 expression was significantly more frequent in SQC specimens (4/4; 100.0%) than in (p = 0.04) SCC specimens (1/6; 16.6%; p = 0.04). These findings suggest that the CK14 and CD56 may be useful markers for differentiating SQC from SCC and vice versa. The p53 may also be useful to differentiate normal esophageal epithelium from SCC or SQC tissue.


Subject(s)
CD56 Antigen/immunology , Carcinoma, Small Cell/immunology , Carcinoma, Squamous Cell/immunology , Diagnosis, Differential , Epithelium/pathology , Esophageal Neoplasms/immunology , Humans , Immunochemistry , Keratins/immunology
4.
Acta oncol. bras ; 7(1): 13-20, jan.-abr. 1987. ilus, tab
Article in Portuguese | LILACS, Inca | ID: lil-40409

ABSTRACT

Estudou-se o impacto das neoplasias malignas de esôfago sobre o estado nutricional e imunológico dos pacientes e correlacionaram-se os resultados obtidos com o tratamento recebido e a evoluçäo desses pacientes. Foram estudados 38 pacientes portadores de carcinoma espinocelular de esôfago, no Depto. de Cirurgia Torácica do Hospital A. C. Camargo, no período de l983-1984. Medidas antropométricas, laboratoriais e imunológicas foram realizadas. Verificou-se que há uma interaçäo entre a desnutriçäo e a imunoincompetência provocada ou agravada por ela e que se justifica a necessidade de suporte nutricional e imunológico como parte do tratamento multidisciplinar destes tumores


Subject(s)
Humans , Male , Adult , Middle Aged , Nutritional Status , Immunity, Cellular , Esophageal Neoplasms/immunology , Antibody Formation
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