Abstract
The presence and functional status of intracellular expression of caspase 8, caspase 10, cFLIP, caspase 3, survivin, and NF-κB was investigated in permeabilized tumor and tumor-infiltrating lymphocytes (TIL) in gastric carcinoma (N = 20) from primary locus, metastatic gastric carcinoma (N = 22) from malignant ascites, and benign gastric mucosa (N = 20) for the control. The quantitative analysis was based on the percentage of positive cells by a flow cytometry. The results showed that the six intracellular molecules were constitutively expressed in primary and metastatic carcinomas as well as normal epithelium in nearly all the patients. In particular, metastatic carcinoma revealed to significantly overexpress these molecules. In the analysis of TIL, the expression of these six molecules could usually be observed in carcinoma and normal epithelium. There was aberrant expression of these molecules in immune TIL within metastatic carcinoma nests. Taken together, the results showed the significantly different expression of the signaling molecules in both tumor and TIL between primary and metastatic carcinoma nests. Increased expression of cFLIP, survivin, and NF-κB in carcinoma might play an important role in hindering an intracellular apoptotic process, followed by accelerating the cancer invasion and/or metastasis.
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Koyama, S. Differential Expression of Intracellular Apoptotic Signaling Molecules in Tumor and Tumor-Infiltrating Lymphocytes During Development of Invasion and/or Metastasis of Gastric Carcinoma. Dig Dis Sci 48, 2290–2300 (2003). https://doi.org/10.1023/B:DDAS.0000007865.96569.9a
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DOI: https://doi.org/10.1023/B:DDAS.0000007865.96569.9a