Biomedical subjects
Publications and source records attributed to F Tanaka.
This is a case report of a 19-year old woman with primary leiomyosarcoma of the lung. The tumor was successfully diagnosed by the bronchial brushing method under fluoroscopic guidance. Cellular features of the leiomyosarcoma are described in detail.
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The vascular endothelial growth factor (VEGF) and its receptor (Flt) protein expression was immunologically studied individually and in combination with the microvascular density (MVD) determined by the factor 8-related antigen (F8RA) and their prognostic value in 118 patients with a pulmonary adenocarcinoma. The presence of VEGF and Flt was associated with the MVD and prognosis. A reduced expression of both of VEGF and Flt correlated with less tumor angiogenesis and a better prognosis. Our findings suggest that VEGF and Flt expressions play an important role in tumor angiogenesis and that the VEGF and Flt coexpression promotes angiogenesis and metastasis in pulmonary adenocarcinoma.
MAGE genes code tumor antigens that are recognized by cytolytic T lymphocytes and have been shown to be expressed in various malignant tumors. However, there is still little information on the expression of the MAGE gene family except for reports of MAGE-1 and -3. In this study, we therefore investigated the expression of MAGE-4, -6, -8, -9, -10, -11 and -12, as well as MAGE-1, -2 and -3 in both cell lines and surgical samples of gastric carcinoma, using reverse transcriptionPCR. Of the investigated 11 cell lines, MAGE-4, -6, -8, -9, -10, -11 and -12 were detected in 8 (73%), 6 (55%), 2 (18%), 59 (44%), 6 (55%), 4 (36%), and 7 (64%), respectively. No expression of these genes was seen in any of the 54 samples of normal gastric tissue. In contrast, the tumor tissue samples were found to express MAGE-4, -6, -8, -9, -10, -11, and -12 in 18 (33%), 13 (24%), 6 (11%), 10 (19%), 5 (9%), 13 (24%), and 10 (19%), respectively. Forty-four (82%) of 54 gastric tumors expressed at least one of these genes. No significant correlation was observed between the expression of MAGE genes and any specific clinicopathological factors. These results may hopefully prove to be useful in developing strategies for tumor-specific immunotherapy of gastric carcinoma using MAGE gene products.